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某工程在复合地基施工中未经设计单位同意 ,将高压旋喷桩修改为深层搅拌桩 ,其后 ,业主怀疑下卧层强度不足 .为确定现有复合地基的实际承载力及变形性能 ,采用深层沉降仪监测地基范围内各层土体的实际变形 ,并以观测数据分析不同土层的受力状态 .结果表明 :下卧层强度及变形性能满足原设计要求 ,工程可以施工到原设计高度
In the construction of a composite foundation without the consent of the design unit, a project is to modify the high pressure jet grouting pile into a deep mixing pile, and then the owner suspects that the strength of the subsoil is insufficient.In order to determine the actual bearing capacity and deformation performance of the existing composite foundation, The deep settlement meter monitors the actual deformation of the soil layers in the foundation and analyzes the stress state of different soil layers with the observation data.The results show that the strength and deformation of the sublayer can meet the original design requirements and the project can be constructed to the original design height