L型地铁深基坑地下连续墙变形监测分析

MONITORING AND ANALYSIS OF DEFORMATION OF UNDERGROUND DIAPHRAGM WALL IN L-SHAPED SUBWAY DEEP FOUNDATION PIT

为研究密集建筑群周边采用明挖法进行地铁车站深基坑施工中围护结构内力变化规律,文中以福州地铁某换乘车站为工程背景,采用实测与理论计算相结合的方法展开研究。监测结果表明,上层土体开挖之后,地面荷载越大,地下连续墙上部内力变化速率越快,施工过程中需要密切注意北侧连续墙的数据变化情况,做到及时预警。

Taking a transfer station of the Fuzhou Metro as the case,the change of internal forces of the enclosure structure during the construction of deep foundation pits of metro stations by open cut method around dense building complexes was carried out by field data and theoretical calculations.The monitoring results show that the greater the ground load,the faster the rate of change of internal forces in the underground diaphragm wall after the upper soil is excavated.During the construction process,paying close attention to the data changes of the north diaphragm wall is necessary to achieve timely warning.