摘要
基于其古顶炭质泥岩隧道现场出现的问题,考虑炭质泥岩遇水膨胀软化效应,建立锁脚锚管-钢拱架力学模型,采用结构力学和材料力学理论分析了围岩产生的松散压力和支护后产生的弹性抗力对钢拱架的力学影响,分析了锁脚锚管抗滑移性能和弯曲性能,给出了超挖地段锁脚锚管-钢拱架的稳定性判断依据并进行计算,利用ANSYS软件对锁脚锚管-钢拱架受力进行模拟验证.根据对锁脚锚管-钢拱架稳定性的理论计算和数值模拟数据对比可知:锚管与钢拱架连接点的弯矩、竖向力和水平力的理论计算值与数值模拟结果基本保值一致,验证了锁脚锚管—钢拱架稳定性验算理论的有效性与合理性.
To solve the problems in Qi Gu Ding tunnel made of carbonaceous shale,considering the carbonaceous mudstone expansion under the influence of water softening effect,the mechanical model of feet-lock pipe-steel arch is established.The structural mechanics and material mechanics theory is adopted in analyzing the influence of the loosening pressure imposed by the surrounding rock and the elastic resistance caused by supporting on the mechanics of steel arch.Then the feet-lock pipe slip resistance and bending performance are analyzed,providing criterion for judging and calculating the stability of the feet-lock pipe-steel arch in over break sections.The force on feet-lock pipe-steel arch is simulated by using ANSYS software.After comparing the theoretical calculation and numerical simulation results of to feet-lock pipe-steel arch stability performance,it is concluded that bending moment of the connection point between anchor pipe and steel arch,the theoretical calculation results of the vertical force and horizontal force is basically consistent with the results of numerical simulation.This proves that the stability checking method offeet-lock pipe-steel arch is correct and effective.
作者
梁辉如
王永东
燕新
刘俊锋
彭浩
郭旭东
LIANG Huiru;WANG Yongdong;YAN Xin;LIU Junfeng;PENG Hao;GUO Xudong(Guangdong Road&Bridge Construction Development Co.,Ltd.,Guangzhou 510507,China;School of Highway,Chang’an University,Xi’an 710064,China)
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2020年第4期34-41,共8页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
广东省交通运输厅科技项目(2019Z6)。
关键词
隧道工程
锁脚锚管
修正系数
稳定性验算
数值模拟
tunneling engineering
feet-lock pipe
correction factor
stability checking
numerical simulation
作者简介
第一作者:梁辉如(1971-),男,广东广州人,高级工程师.研究方向为隧道工程.email:mzdhgs@163.com;通信作者:王永东(1974-),男,湖北省鄂州人,副教授,博士.email:wydchdgl@163.com.
