Analysis Of Soil Arching Effect Of Double-row Anti-slide Piles

Anti-slide pile is widely used in the landslide governance， A large number ofengineering practice proved that sliding of landslides mainly depends on soil archingeffect to prevent soil between piles，Then gets up the anti-slippery effect. Soil archingeffect is the soil for inhomogeneous deformation，makes a phenomenon in the soil stressprincipal stress deflection to the pile body，Pile soil arching effect for a long time iswidely concerned in engineering field，especially since twentieth Century， themeasured data of soil arching effect，model test and theoretical study of graduallyincreasing. In landslide，for there is a clear sliding surface and the landslide thrust islarger，if setting a row of anti-slide pile is a lot of cross section and the pile length，leadto higher cost or retaining structure is unreasonable，then can consider to adopt doubleor more rows of anti-slide pile top management， the cantilever double-row piles is oneof the more common in double-row anti-slide pile，is often used in cutting side slopeand foundation pit supporting with baffle cantilever double-row piles. The current studyof double-row anti slide pile is still in the exploratory stage，there is no mature theoryand practical design method, the mechanism is not very clear，and the study on thedouble cantilever piles is even less，because in the actual project, with a baffle of doublecantilever piles are widely used，therefore this paper is based on the Chongqing city100engineering and technical talents project "cantilever anti slide pile soil arching effect ofthree-dimensional and dynamic disaster"（NO.0218002432010），through indoor modeltest and numerical analysis of three-dimensional soil with baffle cantilever double rowpiles of arch effect is studied，the main work and conclusions are as follows:（1）On the basis of literature review，research status of anti slide pile soil arching effectand the mechanism of its formation were reviewed，summarized the results of previousstudies on soil arching effect.（2）Design of indoor model test of cantilever pile，tests focusing on the strain of pileand soil between piles and pile of internal stress distribution analysis on study of soilarching effect，analysis of the influence of top load and soil water content to cantileverrow pile soil arch；Analysis of the influence of top load， row spacing and different pilearrangement on double cantilever pile soil arching effect and front and rear row of theinternal force of the pile body，in this paper test models，cantilever double-row piles aredivided into parallel cantilever double-row piles and cantilever double-row quincuncial piles of two different arrangement.（3）Use of a large general purpose finite element analysis software for ABAQUScantilever double-row piles with the numeric value calculation，and the value tocalculate results with indoor model test results of the analysis for comparativestudies.To investigate the piles row distance，horizontal thrust，baffle stiffness influenceon the double cantilever piles soil arching effect and the internal force of pile body，comparison of the double cantilever piles two different layout of piles，and withembedded double row piles and beams with cantilever double row piles are analyzed.