浅埋岩体隧洞初始地应力场位移反分析方法研究
Displacement Back Analysis of Initial Sresses Filed of Shallow Rock Masses Tunnel
作者:周家文(四川大学 水利水电学院,水力学与山区河流开发与保护国家重点试验室,四川 成都 610065);杨兴国(四川大学 水利水电学院,水力学与山区河流开发与保护国家重点试验室,四川 成都 610065);吴震宇(四川大学 水利水电学院,水力学与山区河流开发与保护国家重点试验室,四川 成都 610065);刘兴宁(中水顾问集团 昆明勘测设计研究院,云南 昆明 650051);李洪涛(四川大学 水利水电学院,水力学与山区河流开发与保护国家重点试验室,四川 成都 610065)
Author:Zhou Jiawen(School of Water Resources and Hydropower, Sichuan Univ., State Key Lab. of Hydraulics and Moutain River Eng., Chengdu 610065, China);Yang Xingguo(School of Water Resources and Hydropower, Sichuan Univ., State Key Lab. of Hydraulics and Moutain River Eng., Chengdu 610065, China);Wu Zhenyu(School of Water Resources and Hydropower, Sichuan Univ., State Key Lab. of Hydraulics and Moutain River Eng., Chengdu 610065, China);Liu Xingning(Kunming Investigation and Design Inst., China Hydropower Consulting Group, Kunmin 650051, China);Li Hongtao(School of Water Resources and Hydropower, Sichuan Univ., State Key Lab. of Hydraulics and Moutain River Eng., Chengdu 610065, China)
收稿日期:2008-10-26 年卷(期)页码:2010,42(1):35-41
期刊名称:工程科学与技术
Journal Name:Advanced Engineering Sciences
关键字:岩石力学;隧洞;开挖位移;反分析;初始地应力场;侧压力系数
Key words:rock mechanics;tunnel;excavation displacement;back analysis;initial stresses filed;lateral earth pressure coefficient
基金项目:〗国家自然科学基金资助项目(50539060);四川大学青年教师科学基金资助项目(2008047)
中文摘要
对于隧洞开挖数值计算问题,能否合理的模拟初始地应力场是技术关键。由于在浅埋岩体隧洞数值计算过程中,初始地应力场控制隧洞围岩变形规律,岩体力学参数控制围岩变形大小。根据初始地应力场的数值计算方法,假设垂直方向的初始地应力为岩体自重,在考虑两个水平方向的初始地应力不相等基础上,提出了以开挖相对位移比例和开挖相对位移增量比例为对象的浅埋隧洞初始地应力场反分析方法,并且通过一简单隧洞反分析实例,说明了该方法简单易行、结果合理,符合工程实际。
英文摘要
According to the numerical simulation method of initial stresses filed,and based on the assumptions that vertical initial stress is equal to gravity stress of rock masses, and two direction horizontal initial stresses are not equivalent an initial stresses field back analysis method which used the object of the excavation relative displacement ratio and the excavation relative displacement increment ratio for shallow tunnel was put forward.Through a back analysis example of a shallow tunnel, the results showed that, this back analysis method is simple and easy operation; the results is rationally and accord to the engineering fact.
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