Experimental Study On The Stress Characteristics Of Double-row Anti-slide Pile Without Coupling Beam

The geological environment in the loess area of northwestern China is relatively fragile,which is prone to landslide and other geological disasters.In addition,the large-scale development of the project construction this year has exacerbated the occurrence of landslides and other geological disasters.At present,for the control of loess landslides,due to the relatively mature theory of calculation,single-row anti-slide piles are used in many applications and have achieved good engineering results.However,for some large-scale landslides,single-row anti-slide piles cannot be effectively against sliding and double-row anti-sliding piles often become the first choice.The imperfect calculation theory of doublerow anti-sliding piles greatly limits its application in landslide control,so it is very necessary to carry out experimental research about the stress characteristics of the double-row antislide piles.In this paper,the double-row anti-slide piles without beams are parallelly erected in the control of loess landslides.Based on field investigation and data analysis,model tests of the double-row anti-slide pile are carried out on the force model,and the model tests are compared and verified by ABAQUS numerical simulation software.The main research contents of the paper are as follows:(1)On the basis of the field investigation and data collection,combined with the stress,calculation theory and related research of double-row anti-slide pile,the model test of the double row anti-slide pile without coupling beam for the loess landslide control is designed,the corresponding experimental research is carried out,and a lot of test data are obtained.(2)The mechanism of pile-soil action of double row anti-slide pile with no continuous beam is studied through the analysis of test data,and the main understandings are as follows:1)The proportion of post and front pile of double row anti-slide pile to landslide thrust is about 6:4.2)The stress of double-row anti-sliding piles is the bending-shearing mode.In the sliding surface,due to the slippage of the sliding surface,shearing is dominant,and the remaining parts are mainly bending.This results in a double-hinge failure mode.One is located in front of the pile above the slip surface and the other is located behind the slip surface below the slip surface.(3)In order to verify the indoor model test,the ABAQUS finite element software was used to mathematically model the double beam anti-sliding piles without coupling beam.The displacement,bending moment and shear force of the pile were analyzed and studied with the model test results,and compared with model test results.