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在高层建筑帮市政地下工程施工中,当基坑开挖深度较大、地基土质较差或周边距建筑物、地下管线较近,施工受周受周围环境限制时,往往采用内支撑式基坑支护体系。在这种情况下,基坑的支护结构组成。挡土结构的作用是直接承受侧向土压力、水压力,使基坑免于坍塌;支撑结构的作用是间搠承爱上述外力使基抗保持平衡,控制位移。二者构成一个整体,共同抵挡外力的作用。同时,还视情况采取止水或地基加固等措施,以保证基坑施工的晏全作业和保护邻近建筑(构筑)物、地下管线的安全使用。
In the construction of underground construction projects for high-rise buildings, when the pit excavation depth is large, the foundation soil quality is poor, or the surrounding area is close to the building and underground pipelines, and the construction is restricted by the surrounding environment, internal support pits are often used. Support system. In this case, the foundation pit support structure is composed. The role of the retaining structure is to directly withstand the lateral earth pressure and water pressure, so as to prevent the foundation pit from collapsing; the role of the support structure is to ensure that the foundation resists the balance and controls the displacement. The two constitute a whole and jointly resist the role of external forces. At the same time, measures such as water stoppage or foundation reinforcement are also taken as appropriate to ensure the full operation of foundation pit construction and the safe use of nearby buildings (construction) and underground pipelines.