The sound inspection identifies the detachment and delamination of the lining concrete, supporting the early detection of areas with a high risk of spalling.
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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basic information
【Investigation Methods】 - Sounding test (confirmation of delamination and detachment using a test hammer) - Close visual inspection (confirmation of cracks, discoloration, and relation to rust stains) - Recording of the delamination and detachment areas on a development diagram - Evaluation of detachment risk and determination of urgency 【Main Items to Confirm】 - Location and extent of delamination and detachment in the lining concrete - Relation to cracks (intersections, alignment, etc.) - Relationship with rust stains and water leakage - Determination of the need for emergency measures (identification of areas requiring urgent repairs) 【Deliverables】 - Deformation development diagram (recording the areas of delamination and detachment) - Photo ledger (close-up photos of sounding test results and damage conditions) - Detachment risk assessment and urgency determination materials - Delivery: PDF report, photo data, Excel ledger, etc.
Price information
Individual estimate Costs vary 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】 - Identification of areas at risk of tunnel lining spalling and urgency assessment - Conducting sound testing during regular inspections - Determining the extent of delamination and detachment before repair work - Emergency inspections (prompt confirmation of the current situation after abnormal reports) 【Examples of Achievements】 - Identified spalling risk areas through sound testing of aging tunnels - Added sound testing to regular inspections, discovering areas of detachment that were not visible externally - Conducted sound testing for multiple tunnels collectively, organizing repair priority sections - *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).
