测绳法在基坑周边土体变形测量中的应用  

APPLICATION OF ROPE MEASURING TO SOIL DEFORMATION MEASUREMENT AROUND THE FOUNDATION PIT

作　　者：薛丽影[1] 王新东 杨斌[1] 

机构地区：[1]中国建筑科学研究院地基基础研究所建筑安全与环境国家重点实验室,北京100013 [2]昆明市建筑设计研究院有限责任公司,云南昆明650041

出　　处：《岩石力学与工程学报》2013年第A01期2710-2715,共6页Chinese Journal of Rock Mechanics and Engineering

摘　　要：研制基于测绳法的土中多点沉降测量设备,用来测量土体分层竖向位移,其精度高于目前常用的测量方法,且满足单孔多点的测量要求,并成功应用于昆明银杏金川基坑支护工程现场实测。土中多点沉降测量设备结合土体水平位移观测,实现土层深部任意点矢量位移的量测。根据某基坑实测的土体位移,对其线应变、体应变场进行分析。土体单元发生竖向压缩、水平膨胀,且竖向压缩量大于水平膨胀量,宏观表现为地表沉降曲线面积大于支护结构水平位移曲线面积。The multipoint settlement measurement equipment in the soil based on rope measuring has been developed. It is used to measure the vertical displacement of the soil, the precision of which is higher than the commonly used measuring methods. Also it can meet the measuring requirements of single-port and multipoint and successfully be used in Kunming Yinxing Jinchuan foundation pit field measurement. The equipment of measuring multipoint settlement in the soil combines with the horizontal displacement measurement of the soil, which can achieve the displacement measurement of any point in the deep soil. The linear strain and volumetric strain are analyzed according to the actual displacement measurement of the foundation pit soil. The soil unit made vertical compression and horizontal swelling and the vertical deformation is larger than the horizontal deformation, which manifests that the area of the ground surface settlement curve is larger than that of supporting structure horizontal displacement curve in the macroscopic.

关 键 词：基坑工程 基坑监测 沉降测量 现场试验 研制 

分 类 号：TU47[建筑科学—结构工程]