STUDY ON THE STABILITY OF PEBBLY CLAY SLOPES WITH PIPE DRAINAGE SYSTEM
管网渗流系统对含碎石粘性土边坡的稳定作用

Landslides often develop in pebbly clay slopes as toe cutting or surface loading. The mechanism of this kind of landslide is concerned with the change of mechanical condition and with the change of hydro-geological condition. Groundwater pipe drainage system usually develops in pebbly clay slopes. It is important to restrict groundwater level from rising in a slope. Therefore,the pipe drainage system is an important factor to keep a pebbly clay slope from failure. When local failure of a slope takes place by cutting at slope toe or loading on slope surface,the pipe drainage system may be destroyed. As a result,the ground water level will rise obviously and a landslide may take place. The effect of pipe drainage system on slope stability is studied by investigation and calculation of a landslide,and a physical model is used to uncover the development of groundwater pipe drainage system.