地面超载对支护结构的影响  

Influence of Ground Overloading on Supporting Structure

作　　者：黎永索[1,2] 张可能[1] 周斌[1] 陈宾[1] 

机构地区：[1]中南大学地学与环境工程学院,长沙410083 [2]湖南城市学院土木工程学院,湖南益阳413000

出　　处：《防灾减灾工程学报》2009年第2期201-205,共5页Journal of Disaster Prevention and Mitigation Engineering

基　　金：湖南省自然科学基金项目(07JJ6070)资助

摘　　要：通过对超载所引起的作用在支护结构上的土压力的分析,提出超载较大时按应力扩散的方法确定超载作用的影响范围,建立了超载对支护结构土压力的计算模型,推导了支护结构土压力的计算公式,该计算模型可以较好地解释经典土压力理论计算中支护结构主动土压力偏大、被动土压力偏小的问题。该计算模型成功地用于工程实践后,大幅度降低了基坑支护的造价,表明其具有明显的适用性和经济性,因而对基坑支护和边坡支护的理论研究和工程实践具有借鉴意义。In this paper, through analyzing the action of ground overloading on supporting structure, a method to define the influential extent of ground overloading was proposed according to the methodology of stress diffusion, and a calculating model was set up to derive the formula of soil pressure on supporting structure, which can explain why the active soil pressure is bigger while the passive soil pressure is smaller in the classic theory of soil pressure. The model has been successfully applied in engineering practice to reduce significantly the cost of the pit support, which shows the efficiency of the model in terms of both applicability and economy. So, it is useful in both the theoretical study and the engineering practice of pit support and slope support.

关 键 词：地面超载 支护结构 基坑支护 土压力 

分 类 号：TU413.4[建筑科学—岩土工程]