Research on Raft Foundation Construction Technology of Large Deep Foundation Pit in Urban Area
In order to solve the problems of small rafting construction site and complex surrounding environment in urban areas,this paper takes a super high-rise building project as an example to deeply analyze the construction technology of raft foundation in large deep foundation pit.The results show that the concrete pouring speed is2.3～4.0 times higher than that of the traditional truckborne pump(30 m3/h).The verticality and levelness of the raft foundation after construction are 2.1 mm and 0.5 mm,and the compressive and set strength of the concrete are 45.3 MPa and 6.8 MPa,respectively,which meet the design requirements.It shows that the concrete pouring technology adopted in this project has high feasibility,good construction effect.
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