填砂地基中碎石桩复合地基受力特性研究  

Study on the Force Characteristics of Rubble Pile Composite Foundation in Sand-filled Foundation

作　　者：邓凡 吕文龙 谢明桦 DENG Fan;LYU Wenlong;XIE Minghua(Guangdong Academy of Building Research Group Co.,Ltd.,Guangzhou 510500,China)

机构地区：[1]广东省建筑科学研究院集团股份有限公司,广州510500

出　　处：《路基工程》2025年第2期70-73,共4页Subgrade Engineering

基　　金：住房与城乡建设部科技计划资助项目:既有建筑综合改造技术研究(2017-k10-006)。

摘　　要：针对广东省湛江市东海岛填砂地基,开展碎石桩复合地基静载荷试验和桩土应力测试,研究分级荷载作用下碎石桩复合地基的平均桩间土应力、桩顶应力、桩土应力比、荷载分担比变化规律。结果表明:填砂地基中碎石桩复合地基桩土应力比介于1.0~2.0之间;桩间土承担的荷载占比介于80.0%~90.0%之间,碎石桩承担的荷载占比介于10.0%~20.0%之间;经碎石桩复合地基处理后的桩间土地基承载力比处理前提高51.6%。For the sand-filled foundation in Donghai Island,Zhanjiang City,Guangdong Province,static load test and pile-soil stress test were carried out to study the average inter-pile soil stress,pile top stress,pile-soil stress ratio,and loadsharing ratio change rule of the rubble pile composite foundation under graded loading.The results show that:the pile-soil stress ratio of rubble pile composite foundation in sand-filled foundation is between 1.0 and 2.0;the load share borne by the soil between piles is about 80.0%-90.0%,and the load share borne by rubble piles is about 10.0%-20.0%;the bearing capacity of the foundation between piles can be increased by 51.6%after rubble pile composite foundation treatment compared with that before treatment.

关 键 词：填砂地基 碎石桩复合地基 静载试验 应力测试 受力特性 

分 类 号：TU472.35[建筑科学—结构工程]