二元地质条件下内支撑与土钉墙支护设计问题  

Design Problems of Internal Bracing and Composite Soil Nailing Wall in Foundation Pits under Binary Geological Conditions

作　　者：张有祥[1] 杨光华[1] 姚捷[1] 

机构地区：[1]武汉大学土木建筑工程学院,武汉430072

出　　处：《重庆建筑大学学报》2008年第3期63-68,共6页Journal of Chongqing Jianzhu University

基　　金：广东省水利厅科技计划项目(粤水计[2005]205)

摘　　要：结合某基坑工程的设计实践,对在基坑开挖深度内有土层和岩层、且岩层内存在软弱夹层的二元地质条件下采用内支撑和复合土钉墙组合形式支护时存在的问题进行了详细分析,主要包括土压力的计算模式、钢管桩下局部地基承载力的验算、刚-揉性组合支护型式的交接处刚度协调、内撑立柱的约束状态对内支撑稳定性的影响等问题,通过对这些问题的分析,得到在设计类似基坑支护形式时需要注意的问题,并提出解决问题的措施,为同类工程提供参考。Combined with the design practice in foundation excavation engineering,the problems for combined supporting from inner supports and composite soil nailing wall under binary geological conditions,including soil layers and rock stratum with weak intercalation in range of excavation depth,are analyzed.These problems mainly include the following: calculation model of earthen pressure,the local bearing capacity of foundations below steel pipe piles,stiffness coordination at the junction of rigid and flexible sup...

关 键 词：土压力 复合土钉墙 内支撑 刚度 

分 类 号：TU753[建筑科学—建筑技术科学]