超大面积复合地基堆载试验  

Heap Load Test of the Composite Foundation for Super Large Area

作　　者：陆伟岗[1] 周伟[1] 沈锦儒[1] LU Wei-gang ZHOU Wei SHEN Jin-ru(Jiangsu Province Electric Power Design Institute, Nanjing 211102, China)

机构地区：[1]江苏省电力设计院,江苏南京211102

出　　处：《电力勘测设计》2017年第5期5-9,14,共6页Electric Power Survey & Design

摘　　要：某工程桩垫复合地基大面积堆载试验,因面积巨大不可能采用刚性压板。利用2m厚的砂垫层,既可作为试验荷载施于地基上,又可作为柔性压板来逐级施加荷载。这样的静载荷试验不可能做到破坏,荷载与沉降的关系曲线也不会出现拐点,可用分析各主要部件的安全系数来确定承载力特征值。持力层承载力特征值fspk可以采用振冲法复合地基承载力特征值的公式验算。Some engineering pile-cushion large area composite foundation heap load test, because of a very large area, so can＇t use rigid bearing plate. Using 2m thick sand cushion layer, can be used as the test load applied on the foundation, and can be used as flexible bearing plate step by step loading. The static load test not possible to be damaged, there will not be a turning point on the relationship between load and settlement curve. May use analysis the safety coefficient of major parts to determine the pile-cushion composite foundation bearing capacity characteristic value. Bearing stratum bearing capacity characteristic value fspkmay checking computation using calculation formula of vibro-replacement stone column.

关 键 词：桩垫复合地基 承载力特征值 安全系数 

分 类 号：TU4[建筑科学—土工工程]