岩土工程学报Issue(1)：98-104,7.DOI:10.11779/CJGE201501011
砂土盾构隧道掘进开挖面稳定理论与颗粒流模拟研究
Theoretical and numerical simulations of face stability around shield tunnels in sand
摘要
Abstract
The soil density is a key factor for the studies on the limit support pressure and the face stability operation during tunneling construction. Based on the Kirsch’s laboratory model tests, the PFC2D is employed to investigate the influence of soil density on the limit support pressure, residual support pressure and void ratio in the heading face. The failure mechanisms of the excavation face are investigated at the mesoscopic level. The failure behavior and arrange of the face stability of the shield tunnels in sand are analyzed. The improved wedge model is proposed as a method for calculating the limit support pressure of face. It may provide certain guidance to the stabilization of excavation face of shield tunnels.关键词
颗粒流/砂土/隧道掘进/开挖面稳定/极限支护力/改进楔形体模型Key words
PFC2D/sand/tunneling/face stability/limit support pressure/improved wedge model分类
建筑与水利引用本文复制引用
缪林昌,王正兴,石文博..砂土盾构隧道掘进开挖面稳定理论与颗粒流模拟研究[J].岩土工程学报,2015,(1):98-104,7.基金项目
国家自然科学基金项目 （）
