摘要
结合某住宅楼工程混凝土灌注桩承载力检测试验结果，采用数值计算方法分析了桩基承载力不足的原因，讨论了桩基承载力的主要影响因素，包括桩身材料性质、桩土间摩擦性质、桩周土体性质以及持力层土体性质等，分别分析了它们对桩Q—S曲线的影响规律。结果表明：对桩承载力的诸多影响因素中，混凝土桩身强度以及持力层强度是影响单桩承载力的主要因素，桩身弹性模量减小为原来的1／100、持力土层模量减小为原来的116分别会使桩受荷后增加15倍、6倍的沉降量。
Abstract
Based on the bearing capacity test of cast-in-situ concrete pile,numerical simulation method is used to analyze the reason of lacking bearing capacity of pile foundation. The main factors influencing the bearing capacity of pile foundations are discussed by means of analyzing the Q-S curves of piles, including the materials properties, the inter-friction between soil and piles, the properties of the soil around the piles and the features of the bearing stratum. It is shown that the concrete strength and bearing stratum properties are the main factors influencing the bearing capacity of case-in-situ concrete pile. If the concrete pile＇s elastic modulus decrease to 1/100 or the bearing stratum modulus decrease to 1/6 ,the settlement will increase by 15 folds and 6 folds respectively.
基金项目
江苏广播电视大学“十二五”规划课题(12SEW-C-110)
NETL
NSTL
维普
万方数据