By non-excavation, we will achieve seismic reinforcement measures for existing manholes.
The construction method suppresses the uplift of manholes through two functions: ground improvement by vibration and the drainage function for excess pore water pressure relief. Without drawing in groundwater or soil, it is possible to drill from inside the manhole to the bottom of the manhole and install a filter. By vibrating the manhole body and compacting the surrounding ground, ground improvement is achieved, and even if excess pore water pressure occurs due to aftershocks, it is maintenance-free, providing peace of mind. 【Features】 ■ No excavation ■ Maintenance-free ■ Responds to aftershocks *For more details, please refer to the PDF materials or feel free to contact us.
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basic information
【Construction Procedure】 1. Positioning 2. Inverted drilling (drilling 8 inches) 3. Sleeve pipe fixation 4. Base plate drilling (drilling 5 inches) 5. Filter installation 6. Sleeve pipe removal fixation 7. Guidance pipe installation 8. Vibration work 9. Gap filling work *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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We have been in the construction business for over 100 years, based in Ishikawa Prefecture.