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Experimental study on effects of soil pipe on hillslope water dynamics and slope failure

conference contribution
posted on 06.12.2017, 00:00 by Raj Sharma, H Konietzky
Soil pipes (porous pipes inside a hillslope) are often detected in collapsed slopes indicating their influence on slope failure. Flume tests were conducted to see the impact of soil pipes on a slope failure. Three different soil pipe configurations: a) no pipe, b) closed pipe and c) open pipe that are common in the field were conducted. Two types of tests were conducted for each of the pipe configurations: a) rainfall induced failure test and b) seepage induced failure tests. Experimental results show that a closed pipe accumulates water around its lower end and continuously increasespore-water pressure till a failure. Open pipes if are blocked, raises pore-water pressure more rapidly than other cases leading to immediate soil mass movement. This indicates the blockage of open soilpipes makes a slope more susceptible to a failure. The result also showed sudden increase in discharge before the slope failure. Such an increase in hillslope discharge can be taken as an indication of increment in potentiality of slope failure in real hillslopes. Before a large failure small fluctuations in pore water pressure were also seen in the experiments. This can also be used as an indicator of impending failure in an instrumented hillslopes.

History

Parent Title

Proceedings of the 34th IAHR World Congress 26th June - 1st July, Brisbane, Australia.

Start Page

1701

End Page

1708

Number of Pages

8

Start Date

01/01/2011

Finish Date

01/01/2011

Location

Brisbane, Australia

Publisher

Engineers Australia

Place of Publication

Brisbane, Australia

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Faculty of Sciences, Engineering and Health; TBA Research Institute; Technische Universität Bergakademie Freiberg; World Congress;

Era Eligible

Yes

Name of Conference

International Association for Hydro-Environment Engineering and Research. World Congress

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