桩基竖向抗压静载试验及理论研究  

Vertical Compressive Static Load Test and Theoretical Research on Pile Foundation

作　　者：郝龙龙 武坤伦 王利春 HAO Longlong;WU Kunlun;WANG Lichun(China Hebei Jiankan Group Co.,Ltd.,Shijiazhuang 050227,China)

机构地区：[1]中冀建勘集团有限公司,石家庄050227

出　　处：《路基工程》2022年第3期98-102,共5页Subgrade Engineering

摘　　要：依托海南产业园项目,开展了单桩竖向抗压静载试验及理论研究。首先依据规范计算单桩极限承载力的理论值,并依据CASE法承载力计算,得出桩基极限承载力测试理论值;然后给出地基土以及单桩试验检测参数值,对S-1、S-7、S-11、S-15、S-17、S-22等6根基桩进行试验研究;最后分析基桩在静载作用下承载力的变化规律,将理论值与试验值进行对比。基桩的极限承力均满足要求;在基桩桩径相同,入土深度不同的情况下,基桩沉降量随入土深度的增加呈减小趋势;桩基极限承载力理论计算值与试验值基本吻合,CASE法计算桩基极限承载力具有较高的可靠性。Relying on the Hainan Industrial Park project,the vertical compressive static load test and theoretical research of single piles were carried out,Firstly,it calculates the theoretical value of the ultimate bearing capacity of single piles according to the specification,and calculates the bearing capacity of pile foundation according to the CASE method,obtains the theoretical value of the pile foundation limit bearing capacity test.And then it gives the test parameters of the foundation soil and the single pile test,and the six single foundation piles S-1,S-7,S-11,S-15,S-17,S-22 were tested and studied.Finally,the changes in the bearing capacity of the foundation piles under static load were analyzed.The theoretical values were compared with the test values.The ultimate bearing capacity of the foundation pile meets the requirements.In the case of the same diameter of the foundation pile and the different depth of the soil,the settlement of the foundation pile decreases with the increase of the depth of the foundation pile.The theoretical calculation value of the ultimate bearing capacity of the pile foundation is basically consistent with the ultimate bearing capacity obtaine by the test,and CASE method has high reliability in calculating ultimate bearing capacity of pile foundation.

关 键 词：静载荷抗压 入土桩长 单桩极限承载力 单桩极限承载力特征值 桩径 

分 类 号：TU473.11[建筑科学—结构工程]