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天津百货大楼扩建工程位于市中心商业区,地质情况,由于历史原因,工程地域处于退海地,海岸东移所形成,经回填形成现有地墙,在考虑深基坑支护时,考虑地下水位高,有低塑性粉质粘土为主,各层土质有较大的差距。经计算基坑支档采用800mm厚的地下继续墙与四道预应力锚杆结构型式,描杆设计荷载298kN,锁定荷载分别为200kN,200kN,200kN,20kN,第四道描杆锁定值偏小是考虑地下连续墙防止向内出现过大位移的缘故。 锚杆的设计是根据地质条件和描杆设计荷载,确
Tianjin Department Store Expansion Project is located in the downtown business district. Because of historical reasons, due to historical reasons, the project area is in the retreat, the coast is formed eastward, and the existing ground wall is backfilled. When considering deep pit support, consider the groundwater level. High, mainly low-silty silty clay, each layer has a large gap in soil quality. After calculating the foundation pit support, 800mm thick underground continuous wall and four types of prestressed anchor structure are adopted. The design load of the rod is 298kN, and the locking load is 200kN, 200kN, 200kN and 20kN, respectively. The lock value of the fourth track is small. It is due to the fact that the underground diaphragm wall prevents excessive inward displacement. The design of the anchor rod is based on the geological conditions and the design load of the rod.