東日本建設コンサルタント List of Products and Services

Cracks that occur in concrete components of bridges pose a risk of leading to rebar corrosion, spalling, and a decrease in load-bearing capacity as they progress. However, quantitatively recording "where and to what extent cracks exist" can be difficult with visual inspections alone. This service combines close visual inspections, high-resolution camera imaging, and measurements using crack scales to detail the condition of cracks in bridges by specific areas. We create deformation diagrams, photo archives, and inspection reports, which can be used as foundational materials for determining the need for repairs and for longevity planning. We can assist in situations such as "I want to officially document cracks that have been a concern for some time" or "I want to organize the results of regular inspections."

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The deterioration of bridges progresses due to multiple factors such as cracking, spalling, exposed rebar, salt damage, and alkali-silica reaction. Systematically understanding "which components are deteriorating and to what extent" directly relates to determining repair priorities and planning maintenance. This service combines close visual inspections and sound tests to evaluate the deterioration status of bridges by component. A report will be created that records the types, locations, and degrees of changes, providing a basis for assessing soundness and making repair decisions. It addresses the needs of those responsible who wish to "organize the current state of aging bridges" and "determine the priority of repairs."

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"The inspection costs for bridges are putting pressure on the annual maintenance budget. Because multiple bridges are being ordered individually, costs and procedures are accumulating." — Cost management for bridge inspections is a common challenge for road administrators and local governments. This service supports the reduction of total costs through bulk inspections of multiple bridges, regular contracting, and consultations on organizing and reviewing inspection scope and frequency. You can consult with us even if you are at the stage of wanting to confirm whether the current inspection costs are appropriate or wanting to place a bulk order to lower costs.

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In the departments responsible for road management and local governments, even though they understand the legal obligation for inspections, there are increasing cases where securing engineers with specialized knowledge in bridge inspections and the personnel available for inspection work are insufficient. Particularly for close visual inspections, specialized knowledge and field experience are required, making it a challenging area for in-house production. This service entrusts the entire process of bridge inspection (on-site surveys, recording, report preparation, and preparation of administrative documents) to specialized staff. The person in charge can complete the inspection tasks simply by receiving the report, allowing them to focus on their primary duties. We have established a system that can continuously respond even in the event of personnel transfers or resignations.

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In bridges that have been in place for several decades, complex deterioration such as concrete carbonation, salt damage, fatigue, and steel corrosion may be progressing. To make informed decisions about "when repairs should be made" and "whether there are any issues with traffic," it is important to quantitatively understand the current condition. This service combines close visual inspections, sound tests, and detailed damage investigations to evaluate the deterioration status of aging bridges by individual components. We will create a report that serves as a reference for assessing structural integrity, prioritizing repairs, and formulating longevity plans. This addresses the needs of personnel who want to conduct a thorough investigation of bridges that are a concern due to aging.

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Damage to bridges expands in scale the longer it goes undiscovered, leading to increased costs and construction time. Detecting and addressing cracks before they progress to exposed or spalling rebar contributes to controlling maintenance costs. This service supports early detection of damage and monitoring of its progression through regular close visual inspections and the accumulation of deformation records. By comparing with previous inspection data, we visualize "where and how much has worsened," aiding in the judgment of whether and when repairs are necessary. It addresses the needs of those responsible who say, "We continue regular inspections, but we are not utilizing the records" and "We want to address issues before damage progresses."

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"I understand that repairs are necessary, but there is no data to support where and to what extent repairs should be made." — Detailed understanding of the extent and degree of damage is essential for the design and estimation of repair work. There are often cases where records from regular inspections do not provide sufficient information for repair design. This service conducts more detailed close visual inspections, sound tests, and damage measurements than regular inspections, obtaining data that can be used for the design and estimation of repair work. We will create reports that serve as the basis for determining the extent of damage, selecting repair methods, and calculating quantities. We also accommodate collaboration with design consultants and construction companies.

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Cracks in tunnel lining concrete can lead to water leakage, spalling, and the formation of voids behind the lining, making regular recording and evaluation necessary. However, systematically understanding "where and to what extent cracks exist" is not easy due to access restrictions in dark areas. This service combines close visual inspections, high-resolution camera photography, and measurements using crack scales to document the condition of tunnel lining cracks on a layout diagram. We create deformation diagrams, photo archives, and inspection reports, which can be used as foundational materials for determining the need for repairs and for long-term maintenance planning.

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Water leakage in tunnels leads to a combination of risks such as accelerated deterioration of the lining concrete, corrosion of rebar, freezing of the road surface, and erosion of backfill soil. Understanding "where and to what extent the leakage is occurring" is essential for determining the need for repairs and selecting appropriate methods. This service will record the location and extent of the leakage through visual inspection and photography, and evaluate the amount and condition of the leakage (such as seepage, dripping, or outflow). By documenting this in a deformation development diagram and preparing a report, we provide materials that can be used for planning repair strategies and for administrative reporting.

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Tunnel inspections require considerable preparation, including traffic regulations, lighting equipment, scaffolding, and safety management. Challenges such as "the limited scope of inspections that can be conducted at one time due to time constraints on regulations" and "the accumulation of management costs due to individual orders for multiple tunnels" are common among many managers. This service supports the overall efficiency of inspection work by optimizing the inspection of multiple tunnels, traffic regulations, and standardizing records. It addresses the needs of those in charge who want to reduce effort and costs without compromising the quality of inspections.

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The peeling of tunnel lining concrete poses a direct danger to passing vehicles and pedestrians. To detect "bubbles" and "delamination," which are difficult to confirm from appearance alone, systematic checks using sound testing are effective. This service identifies areas of bubbling and delamination in tunnel lining concrete through sound testing and evaluates sections and locations with a high risk of peeling. By recording on deformation development diagrams and determining the necessity for urgent repairs, we support safety assurance and planned repair implementation. We also respond to situations where there is an urgent need to check tunnels that are a concern for peeling.

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"The past inspection records are not organized, and we cannot grasp where and what kinds of abnormalities exist." "Records exist, but they are not in a usable format." — The organization of tunnel deformation records is an important task that serves as the foundation for maintenance management. This service provides comprehensive support from conducting inspection surveys to creating deformation development diagrams, photo ledgers, and inspection reports. We also assist in the digitization and organization of past records, supporting the establishment of ledgers that can be utilized in the long term.

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Inspection work in tunnels prioritizes the safety of both passing vehicles and workers. We respond to the needs of those in charge who find that "traffic regulation arrangements are complicated and planning inspection work is difficult" and "establishing a system to ensure worker safety is burdensome." Our service provides an inspection system that includes planning traffic regulation, arranging lighting equipment, and establishing safety management systems. By optimizing regulation times and sections and ensuring safety management systems, we carry out inspection work reliably and safely. We handle everything from ensuring safety during inspection work to record-keeping and report preparation.

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The longevity of infrastructure is achieved through a systematic accumulation of planned inspections and repairs based on the concept of "preventive maintenance." Reactive maintenance, which addresses issues only after damage has become severe, leads to increased repair costs and longer traffic restrictions. This service provides comprehensive support, from regular inspections of bridges and tunnels to condition assessments, prioritization of repairs, and the formulation of long-term repair plans. By establishing a basis for decisions on "where, when, and to what extent repairs should be made," we support efficient maintenance management within a limited budget.

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"The inspection costs are putting pressure on the annual maintenance budget." "Costs are accumulating because multiple facilities are being ordered individually." — Cost management for bridge and tunnel inspections is a common issue for road administrators and local governments. This service supports the reduction of total costs through bulk inspections of multiple facilities, regular outsourcing contracts, and consultations on reviewing inspection frequency and content. You can consult us even if you are at the stage of wanting to confirm whether the current inspection costs are appropriate or wanting to lower costs by placing a consolidated order.

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"The burden on personnel is significant from the preparation, implementation, recording, and report creation of inspection work. When trying to internalize tasks that require specialized knowledge, the costs become too high." — Streamlining inspection work is a challenge for many road managers and local governments. Our service takes on everything from on-site inspections to recording, report creation, and preparation of documents for administrative submission. Personnel can complete inspection tasks simply by being present at the site or by receiving the report. We also accommodate ongoing contracts, ensuring stable inspection quality even when personnel change.

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"In previous inspection records, the details were insufficient and could not be used for repair design." "There is variability in the quality of records depending on the inspector." — Concerns about inspection accuracy pose risks in all situations involving repair decisions and administrative reports. This service conducts systematic close visual inspections and sound tests in accordance with the Ministry of Land, Infrastructure, Transport and Tourism's inspection guidelines, and records the type, location, and extent of damage in detail. We create reports with clear bases for soundness assessment, which can be utilized for repair decisions, administrative reports, and design materials.

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"I want to plan with evidence on which facilities should be repaired, when, and to what extent." "I want to formulate and update a long-term repair plan, but the basic data is not in place." — The development of maintenance management plans cannot proceed without the accumulation of inspection data and condition assessments. Our service comprehensively addresses everything from regular inspections and condition assessments of bridges and tunnels to organizing repair priorities and creating support materials for long-term repair plan formulation. We respond to the needs of personnel who say, "I want to understand the current situation before making a plan," from surveys to the creation of planning documents.

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Regular inspections of road bridges (mandatory inspections every five years) are fundamentally based on close visual inspections, which require specialized knowledge and field experience. Our service conducts close visual inspections and sound tests in accordance with the inspection guidelines set by the Ministry of Land, Infrastructure, Transport and Tourism, and produces condition assessments, deformation diagrams, photo records, and inspection reports. We provide comprehensive support for necessary inspection tasks across all phases of bridge maintenance management, from regular inspections to detailed surveys before repairs and support for long-term maintenance planning. We respond to requests from a wide range of clients, including road administrators, local governments, and construction companies.

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Regular inspections of road tunnels (mandatory inspections every five years) are fundamentally based on close visual inspections and sound tests of the lining concrete, requiring specialized knowledge and a safety management system. This service conducts close visual inspections and sound tests in accordance with the inspection guidelines of the Ministry of Land, Infrastructure, Transport and Tourism, and prepares condition assessments, deformation development diagrams, photo records, and inspection reports. We provide comprehensive support for necessary inspection tasks across all phases of tunnel maintenance management, from regular inspections to detailed surveys before repairs and support for developing longevity plans.

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To comply with the legal inspection obligations of bridges every five years and tunnels every five years, it is necessary to establish a systematic inspection framework. This service comprehensively handles everything from the annual planning of regular inspections to on-site surveys, documentation, report preparation, and the creation of administrative submission documents. Through an annual outsourcing contract, we can simplify the ordering process each year while maintaining stable inspection quality. Even if the personnel change, it is possible to continuously accumulate inspection records.

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"Reported damage by a passerby" "I want to quickly check the condition of bridges and tunnels after an earthquake or typhoon" — In emergencies, prompt assessment of the situation and safety judgment are required. This service will quickly dispatch to the site after receiving an emergency contact and will record and evaluate the damage status of bridges and tunnels. An emergency inspection report will be prepared, organizing the information necessary for safety assessment, supporting the decision on whether to close the road and the urgency of repairs. If you have been continuously contracting for regular inspections during normal times, we can also smoothly compare with past records.

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For the design and estimation of repair work, detailed damage data is required, which is more specific than the records of regular inspections. This can be utilized in situations where "there are records of regular inspections, but there is no detailed data at a level usable for repair design" or "we want to establish the basis for calculating repair quantities." In this service, we conduct more detailed close visual inspections, sound tests, and damage measurements than regular inspections, and obtain data that can be used for the design and estimation of repair work. We will create reports that serve as the basis for determining the extent of damage, selecting repair methods, and calculating quantities.

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After the repair work is completed, this service can be utilized in situations where you want to confirm whether the repairs have been properly executed and to keep a record comparing the condition before and after the repairs. This service conducts close visual inspections and sound tests after the repair work, confirming the construction status and creating comparison records before and after the repairs. It can be used as verification materials for the effectiveness of the repairs, as attachments for the completion report, and as updated materials for maintenance management records.

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Local governments have a wide range of tasks related to the maintenance and management of bridges and tunnels, including compliance with inspection obligations, record keeping, and administrative reporting. Many cases face challenges in securing specialized technicians and funding for inspections. This service provides comprehensive support from regular inspections (statutory inspections) of bridges and tunnels to the preparation of inspection reports and administrative reports. We create documents in accordance with the formats and guidelines set by the Ministry of Land, Infrastructure, Transport and Tourism, supporting the maintenance and management operations of local governments. We also accommodate ongoing contracts.

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Infrastructure managed by the private sector, such as bridges within factory premises, agricultural waterway structures, and access bridges for logistics facilities, also requires measures to address aging. Even if they are not subject to mandatory inspections, regular self-inspections and record maintenance are effective for ensuring safety and prolonging the lifespan of facilities. This service provides inspection surveys and record maintenance for bridges, tunnels, and structures managed by the private sector. The frequency and content of inspections can be adjusted to meet the needs of the managers, and we can respond flexibly from spot orders to regular contracts.

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Infrastructure located in hard-to-access areas, such as forest roads, agricultural roads, and mountain tunnels, can make inspections difficult. However, overlooking the aging or damage of such facilities poses risks directly related to traffic safety. This service addresses inspections of infrastructure in mountainous and hilly areas that are difficult to access. We will establish an inspection system tailored to the local conditions and carry out reliable close visual inspections and documentation.

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Bridge inspections on major roads and primary local roads with high traffic volumes face significant constraints in terms of regulation times and areas, making the planning and efficient execution of inspection plans challenging. We address the needs of personnel who face issues such as "short regulation times and limited areas that can be inspected at once" and "complex arrangements for nighttime regulations that delay inspections." Our service establishes a traffic regulation plan and an efficient inspection system that utilizes nighttime and early morning regulation periods, ensuring that inspections of bridges with high traffic volumes are reliably conducted.

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Bridges and tunnels that have been constructed for several decades may be experiencing complex deterioration. "I want to determine how to maintain and renew aging facilities," and "I need data to support the decision between repair or replacement" — detailed understanding of the current situation is essential for addressing these issues. This service conducts detailed inspections, condition assessments, and prioritization of repairs for aging bridges and tunnels. We will prepare reports that serve as decision-making materials for repairs or replacements and support the development of maintenance management plans.

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We received an inquiry from a local government stating, "We have conducted inspections of all the bridges in our jurisdiction, but the records are not organized, and we are unable to utilize them for planning maintenance and management." They requested a comprehensive service that includes not only the implementation of regular inspections but also the organization of records, the maintenance of ledgers, and the preparation of support materials for formulating longevity plans. In this case, we conducted close visual inspections and sound tests, and created deformation diagrams, photo ledgers, and inspection reports in accordance with the Ministry of Land, Infrastructure, Transport and Tourism's format. We also prepared a list of condition evaluations and organized materials for repair prioritization, which were utilized in the formulation of longevity repair plans.

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We received an inquiry from a road administrator stating, "We are conducting regular inspections of the tunnels within our jurisdiction, but the records are scattered across each inspection, making it difficult to grasp the progress of any changes." Along with the implementation of the inspection survey, we were asked to standardize the records, organize the ledger, and create comparative materials for changes over time. In this case, we conducted close visual inspections and sound tests, and created standardized formats for the change development diagrams, photo ledger, and inspection reports. We also prepared comparative materials with past records, which were utilized to identify areas of change and prioritize sections for repairs.

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During a regular inspection of a certain bridge, a sound test was conducted on a bridge pier that appeared to be in good condition externally, and a large-scale delamination of the concrete was discovered. If left unaddressed, there was a risk of spalling and exposure of the rebar, but early detection allowed for a reduction in the scale of repairs. This case is a typical example that demonstrates the importance of close inspections and sound tests. Regular inspections and detailed records enable the early detection of damage that is difficult to confirm through visual inspection alone.

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We received an inquiry from a local government stating, "There are several aging bridges within our jurisdiction, but we lack the basis for determining which ones should be repaired first, and we are struggling with budget applications." It was required to conduct a detailed survey and condition assessment of all bridges to objectively organize the repair priorities. In this case, we performed detailed inspections and condition evaluations of multiple bridges and created reference materials for repair plans based on urgency and priority. These materials were also utilized for explanations to the council, leading to budget allocation and planned repair implementation.

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We received an inquiry from a local government stating, "We are individually ordering inspections of bridges in our area every year, but the procedures and costs associated with ordering are piling up." In this case, we consolidated the regular inspections of multiple bridges into a single contract and switched to an annual commissioning agreement. This allowed us to reduce the mobilization costs and procedural expenses that were incurred with individual orders, while ensuring the quality of inspections and the continuity of records. Even with personnel changes, we have maintained a continuous accumulation of records and stable inspection quality.

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We received a request from a road administrator stating, "We must conduct an inspection of the bridge before ordering repair work, but there is not enough time before the construction period." A short-term inspection and delivery of the report were required to align with the repair work schedule. In this case, we quickly organized the inspection system and completed the on-site inspection, damage recording, and report preparation in a short period. We delivered the report in time for the start of the repair work schedule, which was utilized for the construction order.

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We received a request from a certain city stating, "We are conducting inspections of the bridges in our area, but the records are not organized, and we are unable to formulate a long-term maintenance plan. We would like you to handle everything from inspections to plan formulation." In this case, we conducted regular inspections and condition assessments of all bridges in the city, and prepared condition diagrams, photo records, and inspection reports in accordance with the Ministry of Land, Infrastructure, Transport and Tourism's format. We created a list of condition assessments and organized materials for repair prioritization, which were utilized in the formulation of the long-term maintenance plan. We are currently continuing to be entrusted with regular inspections and plan updates.

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Inspection of bridges and tunnels does not yield the same results regardless of who conducts it. Oversights in identifying changes, accuracy of records, and the basis for assessing structural integrity—these qualities vary significantly depending on the knowledge, experience, and recording methods of the inspection technician. Our company conducts systematic close visual inspections and sound tests in accordance with the inspection guidelines set by the Ministry of Land, Infrastructure, Transport and Tourism, and we meticulously document the type, location, and extent of any changes. We prepare reports with clear bases for assessing structural integrity, ensuring they can be reliably used for repair decisions, administrative reporting, and design documentation. Our extensive inspection track record, primarily in Eastern Japan, and our ongoing commitment to improving technology support the quality of our inspections.

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"Inspections are being conducted, but the records are not being utilized" — such voices are often heard among bridge and tunnel managers. By properly organizing and utilizing inspection data, it can be used in various aspects of maintenance management, such as determining the necessity of repairs, prioritizing repairs, formulating long-term durability plans, justifying budget requests, and preparing materials for council explanations. This page introduces typical ways to utilize inspection data and the services that support its utilization. Please use this as a reference for those in charge who are wondering how to make the most of inspection records.

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Inspection work for bridges and tunnels is a site where safety management is particularly important due to traffic regulations, high-altitude work, and work in dark places. We respond to the needs of personnel who want to "delegate inspection work including safety management systems" and "confirm what safety measures are being taken." Our company establishes a safety management system during inspection work by planning traffic regulation measures, installing safety equipment, deploying safety monitors, and ensuring safety during high-altitude work. We provide reliable and safe inspections while reducing the safety management burden on the client side.

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In maintaining and managing harbors and fishing ports, as well as understanding sedimentation conditions and confirming changes in seabed topography, there are cases where the conventional single-line depth surveys cannot adequately capture the irregularities and localized changes. Our company conducts marine surveys utilizing our own multi-beam sonar equipment to acquire and analyze seabed topography with high precision over large areas. 【Main Issues We Can Address】 - Depth surveys of harbors and fishing ports - Understanding sedimentation conditions and considering dredging plans - Confirming seabed topography around aging facilities - Investigating seabed changes after disasters - Creating foundational data for maintenance and management plans We have a long history of engaging in marine surveys and harbor-related operations, particularly along the coast of Fukushima Prefecture, and we can provide comprehensive support from survey planning to measurement, data analysis, and mapping. We welcome inquiries from harbor and fishing port managers, design offices, construction companies, and anyone in need of seabed topography data.

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In dams and reservoirs, understanding the progression of sedimentation and changes in topography is an important issue for long-term maintenance management and ensuring water storage capacity. Conventional single-line surveys may not adequately capture localized sedimentation conditions or subtle changes in topography. Our company utilizes our own multi-beam sonar equipment to accurately acquire the underwater topography of dam lakes and reservoirs in a comprehensive manner. 【Main Issues We Can Address】 - Confirmation of sedimentation conditions in dam lakes and reservoirs - Acquisition of topographic data for understanding water storage capacity - Preparation of foundational materials for maintenance management planning - Assessment of current conditions for dredging considerations - Analysis of topographic changes through year-on-year comparisons The acquired data can be organized into three-dimensional topographic models or contour maps. We will propose analyses tailored to the objectives of the management personnel.

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In harbor depth and shallow surveys and maintenance management operations, it is essential to accurately understand the seabed topography around the quay and navigation routes. In traditional surveys using single measurement lines, there are cases where local sedimentation and scouring conditions cannot be sufficiently grasped. Our company utilizes its own multi-beam echo sounder to acquire seabed topography in the harbor area in a planar manner. This data can be visualized and analyzed as three-dimensional data. 【Main Issues We Can Address】 - Regular depth and shallow surveys in harbor areas - Confirmation of seabed topography around quays and revetments - Understanding sedimentation conditions and preparing dredging study materials - Confirmation of current topography in navigation routes - Acquisition of basic data for developing maintenance management plans Focusing on the Tohoku coastal area, we have a track record in harbor-related operations and can provide consistent support from investigation to analysis and mapping.

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In fishing ports, the progression of sediment accumulation within the harbor and the assurance of usable water depth are important issues for daily operations and maintenance management. Especially in small-scale ports, localized sediment accumulation and changes in topography can directly impact operations. Our company utilizes its own multi-beam sonar equipment to acquire the seabed topography within fishing ports in a comprehensive manner. This data can be visualized and analyzed as three-dimensional topographic data. 【Main Issues We Can Address】 - Confirmation of sediment accumulation status within the fishing port - Understanding of usable water depth - Acquisition of current topography for dredging range considerations - Confirmation of sediment progression through comparative analysis of changes over time - Creation of basic materials for maintenance management planning We have a track record of fishing port-related work, particularly along the Tohoku coast, and we propose survey plans that take regional characteristics into account.

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In the maintenance and management of ports, fishing ports, and coastal areas along the Tohoku coast, the acquisition of extensive and high-precision seabed topography data is required. Our company conducts marine survey operations primarily along the Tohoku coast and is capable of area-wide depth measurement using our own multi-beam echo sounder. 【Available Areas】 - Tohoku coast (focusing on the coastal area of Fukushima Prefecture) - Southern Tohoku to the coastal area of northern Kanto 【Main Services Offered】 - Depth surveys of port areas - Confirmation of sedimentation conditions within fishing ports - Seabed topography surveys of coastal areas - Verification of seabed changes after disasters - Preparation of basic data for maintenance and management planning We will propose survey plans taking into account the marine conditions and regional characteristics of the Tohoku area.

• Surveying

In waterway infrastructure such as ports, fishing ports, and dams, regular topographical surveys are required for long-term maintenance management. Localized sedimentation and erosion conditions that cannot be captured by conventional single-line surveys can be visualized in a planar manner through multi-beam sonar. Our company utilizes its own multi-beam sonar equipment to acquire three-dimensional data of the seabed topography. We conduct analyses that can be used for maintenance management tasks, such as comparing changes over time and estimating sediment volumes. 【Main Services Offered】 - Confirmation of changes over time through regular depth surveys - Monitoring of sedimentation progress - Acquisition of current topography for dredging plan considerations - Preparation of foundational data for maintenance management planning - Verification of seabed topography around structures We propose the development of data that serves as decision-making material for maintenance management, going beyond mere surveying.

• Surveying