摘要
土压平衡式盾构施工中,开挖面支护土压力控制是保证掘进顺利进行的关键,利用能够考虑大变形的拉格朗日有限差分计算程序,对砂土地层土压平衡式盾构施工中开挖面支护应力不足引起开挖面的变形及破坏问题进行了分析研究,探讨了隧道开挖面变形及破坏问题,为砂土地层中盾构开挖面控制压力的确定提供参考。
The face stability control is a key operation during shield tunnel excavation. The study of supporting earth pressure in chamber takes a major role in the design of such kind of underground structures and many centrifugal-model tests have been carried out in recent years. A three dimensional fast Lagrangian differential finite element method which could reflect the large strain behavior of material was employed to simulate the deformation and failure of excavated face. Based on the numerical analysis, some insights were given and discussed.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2005年第8期897-902,共6页
Chinese Journal of Geotechnical Engineering
关键词
盾构
开挖面
支护应力
数值模拟
shield
face stability
support earth pressure
numerical simulation
