水平土拱效应在护壁桩设计中的应用  

Application of Horizontal Arching Effect in Retaining Pile Design

作　　者：耿建勋[1] 耿永常[1] 张克绪[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《地下空间与工程学报》2009年第4期792-796,807,共6页Chinese Journal of Underground Space and Engineering

摘　　要：在护壁桩设计中,根据桩间水平土拱效应确定的合理桩间距有助于安全经济地发挥护壁桩的支护功能。根据各文献归纳出基于水平土拱效应合理确定桩间距的计算式。在此基础上,并根据基坑工程土压力分布的特点建立了土压力增量与位移的非线性共同作用关系的计算模型,将此计算模型应用于桩间距计算式的分析,并进一步探讨了土压力对护壁桩间距的影响。文章最后以工程实例证明,所提出的将水平土拱效应应用在护壁桩设计中的计算方法符合工程实际,可节约基坑支护的成本,具有较高的综合效益。In retaining pile design,tbe rational pile spacing in the light of horizontal aching effect is beneficial to retaining piles to work safely and cost - efficiently. In this paper, a pile spacing calculation formula based on horizontal soil arch effect was put forward according to many documents. Based on the distribution feature of soil pressure, a soil pressure increment - displacement nonlinear interaction calculation model is worked out. Then, the calculation model is applied to analysis of pile spacing calculation formula,and the effect of soil pressure on pile spacing is discussed. Finally the method given in this paper is used in the design of a real foundation pit case to test its applicability. The result proves that this method conforms to construction reality. It can save the cost of retaining structure, and is very efficient.

关 键 词：水平土拱效应 护壁桩 桩间距 非线性共同作用 

分 类 号：TU473.12[建筑科学—结构工程]