本工程为六层砖混结构,现浇钢筋混凝土筏基,有地下室。建筑面积8592m~2。基槽开时发现此处系青龙河老河道,土层极不均匀,大量淤泥、回填土与粉质粘土交叉分布,原地质勘察布点较少,没能充分反映地基上层的情况。开挖时设计及施工部门现场决定挖除淤泥进行换填,此时已超出设计挖深2.4m。经 The project is a six-story brick and concrete structure, cast-in-place reinforced concrete raft basement. Construction area of ​​8592m ~ 2. When the foundation trenches were opened, it was found here that the Qinglonghe old river course had a very uneven soil layer. A large amount of silt and backfill soil were crossed with silty clay. There were few original geologic survey sites, which did not fully reflect the situation of the upper foundation. At the time of excavation, the design and construction department decided to dredge the mud for replacement at this time, which exceeded the designed excavation depth by 2.4m. through