皖南山区灰岩单桩锚杆基础变形破坏特征分析

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中图分类号：U416.1 文献标志码：A文章编号：1001-5922（2026）03-0803-03

Analysis of deformation and failure characteristics of single-pile anchor foundation in limestone of southern Anhui mountainous area

ZHANGJinfeng1，DINGMintao²，LITao³，WULei³，HUChen³

（1.State Grid Anhui Electric Power Co.，Ltd.，Hefei 230022，China; 2. China Electric Power Research Institute Co.，Ltd.，Beijing 100192，China; 3.Economic and Technical Research Institute of State Grid Anhui Electric Power Co.，Ltd.，Hefei 23O022，China）

Abstract：To explore the deformationand failurecharacteristics ofrockbolt foundations andthe bearing mechanism of singlebolts under the limestone geological conditions in the southern Anhui mountainousarea，aresearch method combining field in-situ tests，laboratorytriaxial testsandrefinednumerical simulation wasadopted tosystematically analyze their mechanical behaviors and the influence ofkeyparameters.Field in-situ tests clearly identified that an anchorage depth of about 3.5m is the critical point for the transformation of failure modes. When the anchorage depth is less than or equal to 3m ，the failure is manifested as the overall shear slip at the rock-grout interface ; when the anchorage depth is greater than or equal to 4m ，it transforms into the bond failure at the anchor bar-grout interface.This study provides a theoretical basis and engineering application reference for the design andoptimization of rock bolt foundations in limestone geology.

Key Words ：rock bolt foundation;deformation and failure characteristics;limestone ;parameter optimization

岩石锚杆基础是输电线路工程应对山区复杂地质条件的关键技术，在皖南灰岩地层中展现出显著的经济与环境适应性[1-3]。（剩余3739字）