The Safety Of The Unsaturated Soil Slope Stability Analysis Under Different Moisture Content

The relevant research and engineering application of the theory of unsaturated soil should be the focus in the study of soil mechanics at home and abroad today.As is known to all,is the state of unsaturated soil slope natural existence state of the saturated state is a kind of limit state,unsaturated and saturated the differences of two conditions of slope engineering properties are fundamental.Because unsaturated state of slope instability phenomenon is very common,under construction or already finished for many engineering is a very serious damage and disaster.Therefore,study the stability of soil slopes and perfect the unsaturated state theory is particularly important and urgent.Starting from the research status of unsaturated soil theory at home and abroad at present,the theory of effective stress principle of unsaturated soil,the soil water characteristic curve,the strength theory of unsaturated soil and slope stability research and so on were summarized.For unsaturated soil test the axis-translation technique are briefly introduced.Completed by controlling the suction under the condition of considering the effects of moisture content change of stress path triaxial test of unsaturated soil,and by using digital image measurement system to get the stress and the strain of the unsaturated soil specimen under different moisture content data;Is formed the corresponding soil water characteristic curve of unsaturated soil,and then through the moisture content,soil water characteristic curve,the matrix suction,get within the matrix suction in unsaturated soil under different moisture content.Will be through the test of unsaturated soil specimen test data are collated,Flac3 D software to simulate the unsaturated soil under different moisture content and the safety factor of slope is analyzed.