摘要
浅埋暗挖人行地下通道修建过程中,合理确定分部开挖长度的大小至关重要,分部开挖长度过小,工期延长;分部开挖长度过大,易引起上覆土层不稳定,甚至塌方。文中结合杭州市某地下通道,采用FLAC3D数值分析法,模拟研究了粉砂土中修建人行地道的分部开挖长度大小,研究表明,数值模拟计算的地表沉降和实测的基本吻合,这为今后类似工程施工提供了相关依据。
In the construction of the pedestrian underpass of underground cutting with shallow embedded, it is crucial to rationally delimit the size of step length. If the size of step length is too small, the construction time will be prolonged. If the size is too large, the earth on the top of the tunnel will be unstable, even collapse. Combined with a underpass in Hangzhou, with FLAC3D numerical analysis, study on step length of underpass in silty sand is simulated in this paper. It shows that the number of subsidence of surface got from the numerical calculation is the same as the real situation. This study offers a basis for the further similar construction.
出处
《科技通报》
北大核心
2009年第6期820-825,共6页
Bulletin of Science and Technology
关键词
浅埋暗挖
人行地下地道
分部开挖长度
数值模拟
underground cutting with shallow embedded
pedestrian underpass
step length
numerical simulation
