Study On Force Analysis And Design Method Of "Sliding Pile-Anchor Cable" Structure

Landslide refers to a common geological disaster phenomenon in which slope rock and soil are affected by surrounding environmental factors and human factors,and slide along the sliding surface(belt)under the action of gravity.The landslide had a significant impact on the construction of the project and caused serious damage to the safety of people’s lives and property.The "anti-slide pile-anchor cable" structure,as a new type of landslide treatment method,is mainly composed of anti-slide piles and anchor cables.The anti-slide pile structure bears most of the landslide thrust of the landslide body;the anchorage of the rock and soil body makes up for the shortcomings of the insufficient bending stiffness of the anti-slide pile,and at the same time optimizes the internal force distribution of the anti-slide pile and reduces the displacement of the anti-slide pile top The role.The anti-slide pile structure and the anchor cable structure work together,and they complement each other.In this paper,the research is carried out from several aspects such as the action mechanism,stress characteristics and stress analysis method of "anti-slide pile-anchor cable" structure.The “anti-slide pile-anchor cable” structure relies on the joint action of anti-slide pile,anchor cable and surrounding rock and soil to transmit the landslide thrust to the stable stratum.The anti-slide pile and anchor cable can make the anti-slide pile’s anti-slide ability fully exerted.There are k method,m method,c method and finite element numerical method for calculating the force of anti-slide piles.Through calculation and analysis of landslide cases in Zhejiang Province,it can be seen that the calculation results of m method and finite element method are more accurate.The design method of "anti-slide pile-anchor cable" structure can be divided into "strong pile weak anchor" structure and "strong anchor weak pile" structure.According to the engineering experience,the two design schemes and the characteristics of applicable projects are summarized.After analysis,the "strong pile and weak anchor" structure is more suitable for landslide control in Zhejiang Province.In this paper,a case of a landslide in a primary school in Qixing Street,Xinchang County is selected.Through model analysis,it can be seen that the maximum bending moment of the anti-slide pile is reduced by Eleven percent compared with the anti-slide pile structure.The displacement of the top of the sliding pile is reduced by more than forty percent.By analyzing the current status of the "anti-slide pile-anchor cable" structure landslide treatment,combined with the engineering case of the relocation of the mountain landslide at the Liquan Primary School in Qixing Street,Xinchang County,the landslide was simulated using finite element numerical analysis software and the landslide treatment was carried out Analysis and research.This landslide has a certain representative in the landslide control of Zhejiang Province,and can provide a reference for similar landslide control.