多层住宅工程发生不均匀沉降的原因主要有以下四个方面。一、勘探资料缺乏近年来,大多数新建住宅小区均位于城乡结合部或远郊县,勘探资料积累较少,且多数小区内项目多、范围广,一些住宅小区在建设过程中,不重视勘探工作,没有足够的勘探点地质剖面图作依据或勘探点位间距过大,造成地质剖面图的连续性不可靠。软弱土层的埋深、厚度变化情况及分布范围反映不全面、不准确,甚至有明显差错。少数勘探单位选用的取土器不规范或取土不当,致使原状 The reasons for the uneven settlement of multi-storey residential projects mainly include the following four aspects. First, the lack of exploration data In recent years, most of the new residential area are located in the urban-rural junction or suburban counties, less accumulation of exploration data, and most of the project within a large area, a wide range of some residential area in the construction process, does not attach importance to exploration work , There is not enough exploration site geological profile as a basis or exploration site spacing is too large, resulting in the continuity of the geological profile is not reliable. The depth and thickness of soft soil layer and its distribution range are not comprehensive, inaccurate and even obvious errors. A small number of exploration unit selection of earth borrowers are not nor improper soil, resulting in the status quo