软土盾构隧道结构理论与模型试验研究  

Structural Analysis and Model Test of Shield Tunnel in Soft Soil under Locally Even Load

作　　者：余占奎[1,2] 黄宏伟[2] 娄宇[3] 叶正强[3] 徐凌 李文婷[1] 

机构地区：[1]上海师范大学建工学院,201418 [2]同济大学地下建筑与工程系,上海200092 [3]中国电子工程设计院,北京100840 [4]不详

出　　处：《特种结构》2006年第2期74-77,共4页Special Structures

基　　金：上海市教育委员会科学项目资助(项目编号04DC35);国家自然科学基金(项目编号50279032);上海市科委重大攻关项目(项目编号04DZ12019)

摘　　要：本文通过上海典型地质条件下的盾构隧道结构的相似模型试验量测的模型结构纵向位移分布和纵向的地基土反力(土压力)的分布与结构原型相应理论结果的对比分析,表明尽管理论值比试验值大,但两者的规律相同,通过适当调整局部均布荷载作用下弹性地基梁解析解完全可以满足纵向设计需要,为局部均布荷载作用下软土盾构隧道结构在设计阶段就考虑避免和减小地铁隧道结构运营阶段出现纵缝过量变形所致的渗水、漏水、纵向开裂等既增加运营维护费用又影响地铁安全的问题奠定了基础。The analytic solutions of the displacement, internal forces of shield tunnel and ground reaction of the shield tunnel constructed in soft soil under the same locally uniformly distributed load under which the simultaneous structure model test was conducted was compared with the datum of the longitudinal simultaneous model test of 50 rings of the shield tunnel with nonstaggering installation pattern, especially the displacements and ground reactions. The results show that the values of calculation and results of the model test are different, but they are very similar. So the method of analyzing shield tunnel can be used to design the shield tunnel in longitude under any locally even load, and is one way to conquer such problems as the failure of tunnel structure and waterproofing of joints, which is caused by the longitudinal deformation of shield tunnel.

关 键 词：盾构隧道 弹性地基梁 纵向设计 相似结构 模型试验 

分 类 号：U451[建筑科学—桥梁与隧道工程]