Study On Centrifuge Model Tests Of Anti-slide Pile In Clay

Of all slope failure types,landslide is the widest distribution and the most severe geological hazard.Our nation is one of the countries suffering the mostserious landslide hazard loss in the world. The Three Gorges Reservoir project,Qinghai-Tibet railway project,West-East natural gas transferring project, West-East electricity transmission project,Wenchuan earthquake reconstruction,etc,agreat number of key project related to national welfare and the people's livelihood aresuccessively carried out.As a result,it is urgent to systematic study the way of controlling the landslides to provide scientific basis for engineering practice.Anti-slide pile is one of the most significant measures for controlling the landslide,and it is widely used in the landslide control project.However,due to thegap between the theory study and the engineering practice of anti-slide pile,the determination of design parameters of anti-slide pile always depend on engineering experience,lacking of reasonable standard and scientific theory basis. As a result,the design scheme is difficult to achieve both safety and economy. The main reason for this phenomenon is the interaction mechanism of soil-arch effect between anti-silde piles has not yet fully clear.The main research work done in this thesis consists of the following parts:â‘ Base on the centrifugal model test,combined with the current design principles and internal force calculation method of anti-slide pile to study the friction resistance,the bending moment,shear force distrbution of anti-slide pile and the impact of internal forces to anti-slide pile with the pile spacing changing.â‘¡Through the three-dimensional numerical model to analyze the pile and thesurrounding rock and soil deformation and stress changes in trends, on the base of studying on the interaction mechanism of anti-slide piles and landslide it can propose the calculation method of critical space between anti-slide pile in clay soil.The reasonable distance of anti-slide pile is about 4 times of the pile diameter in clay soil.â‘¢In the other variables obtained by analyzing certain circumstances, the critical spacing between piles increases with cohesion,internal friction angle increaseing. When the soil friction angle is a certain body, changes of the soil arch height is related to spacing between piles and about 1/3 of spacing betweenpiles.