岩土工程学报Issue(12)：2203-2212,10.DOI:10.11779/CJGE201412007
软土盾构隧道横向大变形侧向注浆控制机理研究
Effective control of large transverse deformation of shield tunnels using grouting in soft deposits
摘要
Abstract
Grouting is frequently used to control and adjust the large transverse deformation of shield tunnels in clays. However, the grouting is usually performed based on the engineering experience. The control mechanism of grouting for the tunnel transverse deformation is not clear. In this paper, the method to simulate the performance of grouting through the resulted soil expansion is proposed and validated. The effect of grouting on the large transverse deformation of shield tunnels is investigated in terms of the change of tunnel diameter and joint movement using numerical simulation. The optimization is finally carried out through the parametric study. The researches indicate that the grouting can significantly reduce the tunnel transverse deformation and joint opening, and can also produce remarkable joint offset when the volumetric strain of ground caused by the grouting is larger than 3%. The grouting firstly causes rotation and then rigid movement of tunnel segements. Thereafter, the joint opening reduces more significantly due to the segmental rotation at the beginning of grouting. The joint offset increases significantly due to the rigid movement of tunnel segments when more grouting is injected.关键词
软土/盾构隧道/横向变形/注浆Key words
soft deposit/shield tunnel/transverse deformation/grouting分类
建筑与水利引用本文复制引用
张冬梅,邹伟彪,闫静雅..软土盾构隧道横向大变形侧向注浆控制机理研究[J].岩土工程学报,2014,(12):2203-2212,10.基金项目
国家自然科学基金项目（51278379）；国家基础研究技术项目（2011CB013800）；上海市自然科学基金项目（12ZR1433600）；上海青年科技启明星计划项目 （）
