Shearing Effect Of Anchorage Interface Of Slope Of Rock Body With Weak Layer Under Seismic Action

The anchor is an important supporting member in geotechnical engineering,which can improve the stability of the slope under earthquake action.However,due to the complexity and diversity of anchoring engineering under earthquake action,the anchorage mechanics transfer law under earthquake action has not yet been clarified.The study on the shearing action between the two-anchor interface of the bolt-grout and grout-rock mass is rarely involved.In view of this,this paper designs and completes a large-scale shaking table model test of a slope with a similar ratio of 1:8 with a weak interlayer,and the core problem of rock and soil anchoring is also a key issue----the bolt-grout and grout-rock shearing effect of the two anchoring interfaces was studied.This is also the first time that large-scale shaking table is used to study the shearing effect of the anchoringinterface under earthquake action.And through the FLAC3D numerical analysis software to simulatte the test conditions S-23,further improve and enrich theconclusions of the test.The main work and results are as follows:(1)Similar rock materials which can be used for pouring have been prepared with good fluidity and consolidation,and a two-anchor interface strain gauge sticking method suitable for pouring is provided.(2)The seismic dynamic response of the slope with the weak interlayer and the slope of the rock mass under the S-23 condition is analyzed,and the failure mode and accleeration response law are obtained.Moreover,the shear stress of the anchorage interface was obtained by monitoring the strain of the anchor bolt,and the distribution pattern of the shear stress along the length of the bolt-grout and grout-rock mass interface along the rod length and the development law with time were analyzed in detail at intervals of 0.125s.(3)Simulated the test S-23 condition using FLAC3D.The shear stress of the anchoring interface was obtained by the modified cable unit.The debonding effect of the anchoring interface was achieved by FISH language programming,that is,the interfacial shear stress reached the interface frictional strength and decreased to the interface frictional resistance.Through comparison with the test results,it is found that the test results and numerical simulations have been mutually comfirmed,and the numerical simulation results further supplement the test.This study systematically and comprehensively studies the mechanism of the anchoring system through experiments and numerical simulations,which has certain guiding significance for engineering practice and theoretical exploration.Figure[94]table[17]reference[84].