上海滨江软土地区深基坑工程变形特性实测分析

发布时间：2018-05-13 22:28

本文选题：深基坑 + 承压水　；参考：《结构工程师》2016年05期

【摘要】：上海某变电站深基坑工程位于滨江软土地区,为了确保工程施工的顺利开展,基坑开挖施工期间进行了全面监测。监测内容包括坑外承压水水位、围护结构侧移、围护结构外侧土体侧移、围护结构顶部竖向位移、立柱回弹以及支撑轴力。监测数据表明:采用早强混凝土可能会引起较大的围护结构侧向位移;围护结构的侧向位移随开挖深度增大而增大,最大侧移深度随开挖深度增大而下移,均处于开挖面的附近;围护结构外侧土体的侧向变形发展规律与围护结构基本一致,且外侧土体的侧移均小于其对应围护结构的侧移;而底板的整体浇筑和地下结构施工对基坑变形有很好的限制作用。
[Abstract]:The deep foundation pit of a substation in Shanghai is located in the soft soil area of the riverside. In order to ensure the smooth development of the construction of the foundation pit, comprehensive monitoring was carried out during the excavation of the foundation pit. The monitoring contents include the water level of confined water outside the pit, the lateral displacement of the enclosure structure, the lateral displacement of the soil outside the enclosure structure, the vertical displacement of the top of the enclosure structure, the springback of the column and the supporting axial force. The monitoring data show that the lateral displacement of the surrounding structure may be caused by early strength concrete, and the lateral displacement of the retaining structure increases with the depth of excavation, and the maximum depth of lateral displacement moves down with the increase of the depth of excavation. The lateral deformation development of the surrounding soil is basically the same as that of the surrounding structure, and the lateral displacement of the lateral soil is smaller than that of the corresponding enclosure. The foundation pit deformation is restricted by the integral pouring of the bottom slab and the construction of the underground structure.
【作者单位】：同济大学地下建筑与工程系;上海宝冶集团有限公司;
【基金】：国家自然科学基金资助项目(50708078) 上海宝冶集团有限公司资助项目(2015)
【分类号】：TU753

【相似文献】