Effectiveness of seismic countermeasures against manhole and sewer pipe uplift in liquefied ground
Effectiveness of seismic countermeasures against manhole and sewer pipe uplift in liquefied ground
The floatless manhole countermeasure has been developed and applied to prevent the uplift of manholes owing to ground liquefaction during an earthquake using valves to dissipate excess pore water pressure. The effectiveness of this countermeasure has been verified through centrifuge model tests conducted on individual manholes. Furthermore, the lining pipe countermeasure has been developed to strengthen aging sewer pipes against uplift and connection damage during soil liquefaction. Though these countermeasures are likely to be applied together, their combined effectiveness has not been investigated. This study accordingly conducted a series of dynamic centrifuge model tests on manholes (with and without the floatless manhole countermeasure) connected to a line of sewer pipes (with and without the lining pipe countermeasure) to confirm the effectiveness of these countermeasures against uplift. The results show that the combined use of the floatless manhole and lining pipe countermeasures leads to a quantifiable decrease in manhole uplift under the influence of ground liquefaction induced by seismic excitation.
Sreng Sokkheang SUZUKI; K. Fukuda; Y. Horiguchi; Makoto Sato; Kazuo Sakamaki
5th European Conference on Physical Modelling in Geotechnics (ECPMG2024)
Geotechnical infrastructure
https://doi.org/10.53243/ECPMG2024-57
Contact Information
- Secretary General - Dr A M McNamara
- Email: [email protected]
- Phone: +44 20 7040 8154
- City, University of London
- Northampton Square
- London EC1V 0HB. United Kingdom