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在城市高层建筑中,不是和已有建筑物相邻,就是在已建立工程的包围之中。在这样的环境下完成深基坑开挖,并因此导致场地变形,或因基坑边坡失稳,造成地基变形或稳定性降低;造成排水系统不能正常工作,引起地下水位上升,地基被水浸泡,产生附加变形;已建工程地基或支档工程,因新建工程产生应力迭加,导致变形、失稳;基坑底以下有承压水,因挖基坑,上覆隔水层变薄,有冲毁基底板的可能性,挖基坑
In urban high-rise buildings, it is not adjacent to existing buildings or is surrounded by established projects. Under such circumstances, the deep excavation is completed, which leads to the deformation of the site, or the deformation of the foundation due to the instability of the foundation pit, or the reduction of the stability; causing the drainage system to not work properly, causing the groundwater level to rise, and the foundation water being Immersion, resulting in additional deformation; Foundations or retaining projects have been built, due to the new project due to the superposition of stress, resulting in deformation, instability; the bottom of the pit under the pressure water, because of excavation pit, the overlying aquifer thinning , there is the possibility of destroying the substrate board, digging the foundation pit