Systematically record cracks in tunnel lining concrete to support repair decisions and the maintenance of inspection logs.
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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basic information
【Inspection Methods】 - Close visual inspection (systematic confirmation of lining concrete) - Photographic records of damaged areas using a high-resolution camera - Measurement of width and length using a crack scale - Record of deformation on layout drawings (internal cross-section drawings) 【Deliverables】 - Deformation layout drawings (recording crack distribution across the entire tunnel surface) - Photo ledger (format that identifies damage location and type) - Inspection report and condition assessment (in accordance with road tunnel regular inspection guidelines) - Materials for determining the necessity of repairs 【Applicable Structures and Delivery】 - Road tunnels, waterway tunnels, etc. - Corresponding to different structures such as NATM method, sheet pile method, open-cut method, etc. - Delivery: PDF reports, photo data, Excel ledgers, etc.
Price information
Individual Estimate The cost varies depending on the content of the investigation, the scale of the facility, site conditions, and the type of deliverables. Please feel free to consult with us first.
Applications/Examples of results
【Purpose】 - Recording cracks during regular tunnel inspections (legally required every 5 years) - Detailed investigation and determination of damage extent before repair work - Understanding deterioration progress by comparing with past inspection data - Submission of inspection records to road managers and local governments 【Examples of Achievements】 - Conducting crack surveys and creating deformation development diagrams during regular inspections of tunnels managed by local governments - Detailed recording of crack distribution in lining concrete and organizing priority sections for repair work - Tunnel investigation confirming crack progression through comparison with existing inspection records - *Details of achievements will be provided in materials or upon inquiry*
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Company information
Since its establishment in 1966, East Japan Construction Consultant has been proposing "aha!" moments centered around surveying and design technology for many years. Starting with surveying and expanding into design, land acquisition, compensation, and infrastructure maintenance, we have worked as a comprehensive construction consultant to enhance our services. We have been engaged in the development and maintenance of social infrastructure that supports people's safety, security, and economic activities, including roads, rivers, ports, marine surveys, urban planning, and energy. Currently, in addition to our efforts in disaster prevention, mitigation, and national resilience, we are also focusing on digital transformation (DX) through initiatives such as BIM/CIM, AI, UAVs, and ROVs (underwater drones).
