浆固碎石桩复合地基沉降分析  

Settlement analysis of composite foundation reinforced by grouted gavel pile

作　　者：温世清[1,2] 刘汉龙[1,2] 闫春雷[3] 周元 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学土木与交通学院,江苏南京210098 [3]解放军理工大学工程兵工程学院,江苏南京210007 [4]舟山市港航管理局,浙江舟山316000

出　　处：《解放军理工大学学报（自然科学版）》2012年第1期92-96,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：江苏省自然科学创新学者攀登基金项目(BK2008040)

摘　　要：为研究浆固碎石桩复合地基沉降特性,首先建立了路堤荷载作用下桩土复合地基计算模型,并对桩土复合地基各部分变形协调特性进行了分析,随后按照圆形承载板作用下半空间体位移的解,对路堤荷载下复合地基各部分沉降进行分析,建立了桩土变形协调方程,推导出荷载作用下桩身轴力、桩端反力和桩侧摩阻力的计算公式。在考虑注浆渗透改善作用和桩体等效半径后,建立了复合地基沉降的计算公式。现场试验表明,实测值与理论计算值相吻合。To sesearch the settlement characteristic of composite foundation by grouted gavel pile, firstly the calculation model of the composite foundation under embankment loads was established and the settlement characteristic of the different parts of the composite foundation was analyzed. Then based on the solution of the settlement in half-space under the circular bearing plate, the settlements of the different parts of the composite foundation under loads were analyzed, and the formula of the axial force, the counterforce of the pile head and the side friction along the grouted gravel pile were derived. With the consideration of permeation grouting and equivalent radius, the settlement formula of the composite foundation was established. The results of the local tests prove that the theoretical values are close to the actual measurement results. Therefore the equations deduced in this paper are reasonable and practicable.

关 键 词：浆固碎石桩 复合地基 地基沉降 

分 类 号：TU431[建筑科学—岩土工程]