岩土工程学报Issue(9)：1714-1720,7.DOI:10.11779/CJGE201409019
盾构隧道施工松动土压力计算方法研究
Method for calculating loosening earth pressure during construction of shield tunnels
摘要
Abstract
Due to the limitations on vault displacement, such as lining segment support and synchronous grouting, the soil arching effect only plays partial function during construction of shield tunnels, and the shear stress of soil is less than its shear strength. Terzaghi's loosening earth pressure theory cannot be used for this case. To solve this problem, a method for calculating lateral pressure coefficient is deduced based on the Handy's theory. The results show that the lateral pressure coefficient is associated with the rotation angle of the principal stress, and its value varies between coefficients of active and passive earth pressures. Subsequently, the development of soil arching effect is related to the vault displacement of the tunnels. Accordingly, a computational formula for loosening earth pressure is proposed considering the ground loss and the stiffness of the segment based on the Terzaghi's theory. Finally, a simplified method for predicting construction disturbance scope of tunnels is put forward by studying soil arching height.关键词
盾构隧道/不完全土拱效应/松动土压力/施工扰动Key words
shield tunnel/partially-developed soil arching effect/loosening earth pressure/construction disturbance分类
建筑与水利引用本文复制引用
黎春林..盾构隧道施工松动土压力计算方法研究[J].岩土工程学报,2014,(9):1714-1720,7.基金项目
国家自然科学基金项目（51108078）；安徽省自然科学基金项目（1408085ME98）；铜陵学院人才科研启动基金项目 （）
