摘要
隧道洞口明挖段围岩一般自稳能力较差,如何通过支护等手段保证洞口明挖段在施工过程中的围岩稳定是至关重要的问题。为保证隧道安全顺利施工,采用三维空间弹塑性有限差分法(FLAC)对隧道施工过程进行模拟分析计算,包括施工过程中周边土体的应力分布状况、变形情况,地表沉降情况,支护与衬砌的受力情况和变形状况等方面。根据模拟分析结果对隧道周边土体的稳定性和支护参数做出综合评判,为隧道施工提供科学依据。
Rocks surrounding an open excavated tunnel portal is generally weak in self stability, hence guaranteeing the stability of tunnel portal during its construction is of crucial importance. Three dimensional elasticity and plasticity finite difference method (FLAC) was used for simulating analysis and computation of tunnel construction process, including stress distribution and deformation of surrounding soil, settlement of ground surface, force bearing and deformation of support and lining, etc. A comprehensive assessment of the stability of surrounding soil and supporting parameter was made according to the result of analysis, providing a scientific basis for tunnel construction.
出处
《铁道建筑技术》
2004年第2期13-15,共3页
Railway Construction Technology
