双排桩复合重力拱支护体系的工作机理分析  

Research on Working Mechanism of the Compound Pit-retaining System of Double-row Piles and Gravity Arch

作　　者：郭院成[1] 郭桂叶[2] 张景伟[1,3] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]河南建筑职业技术学院,河南郑州450064 [3]郑州市市直机关事务管理局,河南郑州450007

出　　处：《郑州大学学报（工学版）》2011年第4期1-3,共3页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省自然科学基金资助项目(0611010300)

摘　　要：双排桩与水泥土重力拱复合形成新的支护体系,可充分发挥其重力效应,将靠近坑底部分较大的土压力直接通过重力拱支护向下传至深部土体,中上部土压力通过拱形支护传至抗侧移刚度较大的双排桩支护结构从而充分发挥复合支护体系各部分的承载功能和效益,同时满足高地下水位时基坑截水设计要求.针对其构造特点选取合理的理论分析模型,通过分析复合支护体系上的土压力传力路线,研究双排桩复合重力拱支护体系的工作机理,为该类复合支护结构的工程应用和设计计算理论的建立奠定一定的理论基础.The new pit-retaining system composed of double-row piles and cement-soil gravity arch will make full use of of gravity effect,which transmits the relatively high earth pressure close to the bottom of pit down to deep soil through gravity arch,and the upper earth pressure to double-row piles,which have better lateral resisting stiffness,and further to deep soil.The compound pit-retaining system has the advantages of each single sub-system,and meets the requirements of water-cutting in case of hign ground water level.This paper intends to analyze the form of load effect transmission in the compound system by choosing a proper theoretical analysis model in accordance with its construction features,studies the working mechanism of this system and provide certain reference basis for engineering design,calculation and application of such compound pit-retaining system.

关 键 词：地基基础工程 复合支护体系 双排桩支护 重力拱支护 工作机理 

分 类 号：TU473.1[建筑科学—结构工程]