摘要
结合软土地区某地铁车站基坑工程,通过对地下连续墙及周边土体的系统监测,分析了施工过程中地下连续墙及周边土体的变形规律。研究结果表明。地下连续墙施工会引起周边土体发生水平变形,主要影响深度范围为地表下18m的土体。周边建筑物基础形式也会对地下连续墙周边土体水平位移有影响。邻近建筑物为浅基础时,地连墙周边土体水平位移平均值为0.118%H;邻近建筑物为桩基础时,地连墙周边土体水平位移平均值为0.08%H。邻近建筑物桩基础对土体水平位移有限制作用。当距地连墙超过23m(0.92H)时,基坑周边土体沉降趋于平缓,基坑北侧土体沉降峰值远大于基坑南侧土体沉降峰值。桩基础对其周边土体的影响比对地连墙周边土体的影响更加显著。
Combined with the foundation pit project of a subway station in soft soil area,the deformation law of the diaphragm wall and surrounding soil during construction is analyzed through the systematic monitoring of the diaphragm wall and surrounding soil.The results show that.The construction of di-aphragm wall will cause horizontal deformation of surrounding soil,and the main influence depth range is 18m below the surface.The foundation form of surrounding buildings will also affect the horizontal dis-placement of soil around the diaphragm wall.When the adjacent buildings are shallow foundations,the av-erage horizontal displacement of soil around the diaphragm wall is 0.118%h;When the adjacent buildings are pile foundations,the average horizontal displacement of soil around the diaphragm wall is 0.08%H.The pile foundation of adjacent buildings restricts the horizontal displacement of soil.When the distance from the diaphragm wall is more than 23m(0.92h),the soil settlement around the foundation pit tends to be flat,and the peak value of soil settlement in the north of the foundation pit is much greater than that in the south of the foundation pit.The influence of pile foundation on the surrounding soil is more significant than that of diaphragm wall.
出处
《辽宁省交通高等专科学校学报》
2023年第3期6-9,共4页
Journal of Liaoning Provincial College of Communications
关键词
软土地区
地铁车站
现场监测
变形特征
soft soil area
subway station
on site monitoring
deformation characteristics
