| Abstract:Landslide is a kind of geological disaster, which is widely distributed and serious harmful. China is one of the countries that suffer from the most serious landslide losses in the world. With the fast development of the economic construction in our country, more and more landslides have been found in the project construction. At present, the popular measure to deal with the landslide is passive pile, but the traditional theory avoids pile-soil interaction to some extent, leading to actual engineering design is not reasonable. The thesis relies on the "Landslide-Prevention Structure Interaction and Long-term Safety" of Research Subject4of973National Basic Study Plan (2011CB710604), conducting further research on landslide thrust calculation, distribution form, pile spacing based on the soil arching effect, and soil arching effect.The thesis mainly researches the following aspects:(1) With the deficiency of unbalanced thrust transfer method, combining with the influence of rainfall on landslide thrust calculation, the author puts forward a hybrid thrust calculation method, and verifies the rationality of this calculation method by specific landslide cases;(2) The author puts forward the calculation method that based on thrusting force distribution form of limit equilibrium method, which calculates landslide thrust through calculating the most dangerous sliding surface thrust of assuming cut exports, then gets the distribution mode, and finally through an engineering case, the author proves the applicability of the method;(3) Through the study of soil arching effect, the author puts forward a reasonable passive pile spacing calculation formula based on the soil arching effect, and analyzes the influence of the thrust power, soil mechanical parameters and the geometric parameters of pile on the maximum pile spacing;(4) With the help of numerical simulation software, the formation mechanism of pile been arch effect and influential factors are analyzed. |
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