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Control Of Ground Water For Slope Stability By Trenching Method

Mahwasane , Tshiluvhu Lowani (2009) Control Of Ground Water For Slope Stability By Trenching Method. Universiti Teknologi Petronas, Sri Iskandar,Tronoh,Perak. (Unpublished)

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Abstract

Slope failure can be defined as the slope that collapses due to weakened self-retaining ability of the earth under the certain influence such as rainfall, earthquake and behavior of soil itself. Slope movement depends on two main factors which are slope steepness and slope stability. Many slope failures have taken up during or after a period of rain and its can be concluded that rainfall is the main cause of slope failure. This report presents the results from site investigations and soil tests carried out at the campus of Universiti Teknologi PETRONAS (UTP), where a landsliding had occurred behind building 13. Experiment for soil characteristics was conducted in the laboratory and a model on the influence of rising groundwater level towards the slope stability was designed and tested. The model used was a rectangular tank with dimensions of I in length of 0.5 in and width of 0.4 m deep. The slope angle was about 33° representing angle of a cut slope. PVC pipe was used as a trench and also for standpipe reading. Different water level was used to bring about different groundwater level that might occur on site. The influence of different water level of groundwater was examined by determining the moisture content of the soil as well as the level of water in the standpipe. It was found that the presence of the Trench reduces the level of moisture on the soil even when the height of the groundwater table is at the same level as the soil. The moisture content was always below 24% above the trench while the soil below the trench reached the liquid limit of about 42%. This results differs from those recorded earlier from previous studies done without the trench provided, from their results it was obtained that as water level become higher than the toe the moisture of the soil increased to the liquid limit level this may cause slope failure.

Item Type: Final Year Project
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Users 5 not found.
Date Deposited: 11 Jan 2012 12:24
Last Modified: 25 Jan 2017 09:44
URI: http://utpedia.utp.edu.my/id/eprint/557

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