长江科学院院报2017，Vol.34Issue(10)：79-84,6.DOI:10.11988/ckyyb.20160525
坑内留土对双排桩支护结构的影响分析
Effect of Earth Berm on Double-row Pile Supporting Structure
摘要
Abstract
To investigate the evolution of horizontal shift,bending moment and passive earth pressure of the retaining structure with double-row piles,finite element analysis was conducted to analyze parameters including earth berm size,reinforcement effect and elastic modulus.Results suggest that:1) increasing the width and height of earth berm could both reduce the horizontal shift and bending moment,and increasing the height of earth berm has better effects;2) reinforcing the earth berm could remarkably reduce the horizontal shift of the double-row pile;3)elastic modulus of earth berm over 80 MPa has little effect on the decrease of horizontal shift;4) further increment of the width of earth berm after reaching a threshold has slight impact on improving the earth pressure in passive zone.The conclusion is applied in the Capital Land Shopping Mall at Gutian,and had great economic returns and social benefits.In addition,hardening of the earth berm is an effective measure to avoid platform instability in the construction caused by rainwater soaking.Proper surcharge on the earth berm is an effective way to improve the earth pressure in passive zone,beneficial for controlling the horizontal shift of double row piles.关键词
双排桩/深基坑/坑内留土/被动区土压力/有限元数值分析/前排桩/后排桩Key words
double row pile/deep foundation pit/earth berm/passive earth pressure/finite element analysis/front row pile/back row pile分类
建筑与水利引用本文复制引用
易丽丽,马郧,李松,郭运,朱佳,倪欣..坑内留土对双排桩支护结构的影响分析[J].长江科学院院报,2017,34(10):79-84,6.基金项目
2013年度湖北省建设科技项目计划(鄂建办[2013] 195号201333) （鄂建办[2013] 195号201333）
武汉市城乡建设委员会科研项目(201545,武城建[2015] 191) （201545,武城建[2015] 191）
武汉市“黄鹤英才(城市建设)专项计划”资助项目(武人才[2013]5号) （城市建设）
