输电线路节理化岩体注浆锚杆基础抗拔力数值模拟研究  

Numerical simulation research on pullout strength of grouted bolt foundation in jointed rock masses for transmission lines

作　　者：孙益振[1] 杨岳峰[2] 郑卫锋[3] 梁正召[2] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024 [2]大连理工大学岩石破裂与失稳研究所,辽宁大连116024 [3]中国电力科学研究院工程力学研究所,北京100055

出　　处：《大连理工大学学报》2011年第4期473-478,共6页Journal of Dalian University of Technology

基　　金：国家电网公司科学技术资助项目(SGKJ[2007]1006)

摘　　要：采用正交数值模拟方法研究了岩体及注浆体相关因素对节理化岩体注浆锚杆基础抗拔力的影响.数值模型中考虑了岩石弹性模量、浆体弹性模量、节理迹长、节理倾角、锚杆埋深5个因素的变化,选择5因素4水平的正交试验方法进行了数值模拟.结果表明,锚杆埋深对注浆锚杆基础抗拔力的影响最大,其次为浆体弹性模量、岩石弹性模量、节理迹长、节理倾角,浆体弹性模量和强度对锚杆基础抗拔力的影响虽然大于岩石弹性模量的影响,但是提高浆体强度和弹性模量对节理化岩体注浆锚杆基础抗拔力的提升效果有限.The influence of rock mass and grouted material on the pullout strength of grouted bolt foundation in jointed rock masses is analyzed by the orthogonal numerical simulation.The numerical models focus on the following five factors： elasticity modulus of rock,elasticity modulus of mortar,trace lengths and joint inclination angle in rock mass,embedding depth of the bolt in the rock mass on four different levels of every factor.The experimental results reveal that the embedding depth of the bolt in the rock mass is the most important and sensitive factor influencing the pullout strength of grouted bolt foundation,and the factors next are elasticity modulus of mortar,elasticity modulus of rock,trace lengths and joint inclination angle in rock mass.The elasticity modulus and strength of mortar are more significant than those of rock mass in improvement of the pullout strength of the grouted bolt foundation,but the extent of the improvement is limited.

关 键 词：输电线路 节理化岩体注浆锚杆基础 抗拔力 正交数值模拟试验 

分 类 号：TU47[建筑科学—结构工程]