摘要
将强度折减法应用于静水压力下海底隧道素混凝土衬砌的安全稳定性分析。通过对比两种强度折减方式的位移、应力和应变曲线,判定同时折减衬砌和围岩的强度参数适用于研究海底隧道问题;综合分析隧道衬砌塑性区、剪应变增量和位移的变化情况,判断隧道的极限平衡状态。研究结果表明,素混凝土衬砌发生脆性破坏,破坏位置为拱腰,破坏方式为剪切破坏,局部破坏和整体破坏的安全系数分别为7.56和7.64。
Strength reduction method is proposed to study the safety and stability of subsea tunnel lining. The displacement,stress and shear strain increment are contrasted with different reduce methods. Found the method which reduce surrounding rock and lining＇s strength parameter is better to analysis subsea tunnel. The limit safety state is obtained by considering the plastic state,shear strain increment and displacements. The results show that tunnel haunch makes brittle failure caused by shear stress. Local and structure failure safety factors are respectively 7. 56 and 7. 64.
出处
《四川建筑科学研究》
北大核心
2016年第3期23-27,共5页
Sichuan Building Science
基金
国家重点基础研究发展计划973项目(2011CB013600)
国家自然科学基金资助项目(51378496)
关键词
强度折减法
海底隧道
衬砌
安全系数
strength reduction method
subsea tunnel
lining
safety factors
