成测量技术在基坑变形监测中的应用
2021-11-26谢钱波
谢钱波
摘要:在自然界变形是广泛存在的现象。在各类载荷作用力之下,在空间和时间域中各变形体的形状、大小以及位置发生改变。变形的范围可大可小,大到地球板块运动和地极移动等涉及整个地球的变形,小到对于工程建筑而言的沉降、倾斜、滑坡体滑动等地域性变形,总之,变形几乎无处不在。所谓变形监测的概念就是说应用一些测量方面的仪器和方法监测变形体,以免造成由变形所带来的有关灾害,避免损失。
关键词:测量技术;变形监测;基坑
Application of formation measurement technology in foundation pit deformation monitoring
——take the foundation pit of wuhu railway station as an example
Xie-Qian bo
Anhui Nuclear Exploration Technology central Institute wuhu 241000
Abstract: deformation is a widespread phenomenon in nature,that is,under various loading forces,the shape,size and position of each deformation body in the space and time domain will change.The scope of deformation can be large or small,ranging from the plate movement and pole movement of the earth,which involve the deformation of the whole earth,to the subsidence,tilting,sliding and other regional deformation of engineering buildings. In a word,deformation is almost everywhere.The so-called concept of deformation monitoring is to apply some measuring instruments and methods to monitor deformation,so as to avoid the related disasters caused by deformation. If such losses can be avoided,it is the best,and if they cannot be avoided,we should try our best to reduce it.
Key words: measurement technology,deformation monitoring,foundation pit
1.工程概况
工程包括东、西站厅及站厅见车站通道两部分,基坑面积共约23351m2,周边延长米共1916m,本工程土0.000m对应黄海高程标高12.776m,图中所注标高均为相对标高,单位以米计,图中标注尺寸单位以毫米计。东区站厅及通道部分自然地面标高为整平至-4.300m,西区站厅自然地面标高为-3.300m;本次基坑围护的对象主要为车站东、西区站厅及地下通道,该地下室采用桩基础,基坑东区开挖深度为 9.65m,西区开挖深度为10.65m。基坑安全等级为二级;本工程场地内上部土层以填土及黏性土为主。拟建芜湖站场地位于安徽省东南部,具体位于芜湖市既有火车站站内,仅东部一小部分局部位于既有站外,场地未拆迁,主要分布有既有铁路、既有站房、办公楼、库房、车整所、绿化带等;根据本工程车站地下室基坑的开挖规模、开挖深度、地质情况及周边环境情况,本基坑围护采用钻孔灌注桩+一道砼支撑的围护形式(局部采用两道支撑)。……
