Construction Method for Installing Steel Bars of Elevator Shaft Side Wall in Raft Foundation

Abstract

The invention discloses a construction method for installing elevator shaft side wall rebars in a raft foundation. The construction method comprises the steps that bottom-layer rebars and surface-layer rebars of the raft foundation are constructed, and the position of an elevator shaft is reserved in the raft foundation; a supporting bed-jig is arranged in the position, a certain distance away from the elevator shaft, between the bottom-layer rebars and the surface-layer rebars; an automobile crane is craned to the position, corresponding to the supporting bed-jig, of the surface-layer rebars through a tower crane; and the side wall rebars of the elevator shaft are craned and installed through the automobile crane. According to the construction method for installing the elevator shaft side wall rebars in the raft foundation, the automobile crane is placed on the raft foundation, the traditional tower crane is replaced with the automobile crane to complete heavy craning and installing tasks of the elevator shaft side wall rebars, and overuse of the tower crane is avoided; and meanwhile, the situation that risks exist due to the fact that a chain hoist is close to the side walls when the elevator shaft side wall rebars are craned and installed through the chain hoist in a super-thick raft is also avoided.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method for installing side wall steel bars of an elevator shaft in a raft foundation. Background technique [0002] Due to limited land resources, in order to meet the needs of modern buildings, most of them are super high-rise buildings. Super high-rise buildings must be accompanied by ultra-thick raft foundations. The thickness of raft foundations is relatively large, generally reaching 5 meters or more. In the construction of the steel bar on the side wall of the shaft, due to the large thickness of the raft on the side wall of the elevator shaft, the amount of reinforcement on the side wall of the elevator shaft is large, and the weight of the steel bar is also heavy. The weight of each steel bar generally reaches 100kg-150kg. Cannot be installed manually. [0003] Due to the super thick raft of the side wall of the elevator shaft, which can generally reac...

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Problems solved by technology

[0002] Due to limited land resources, in order to meet the needs of modern buildings, most of them are super high-rise buildings. Super high-rise buildings must be accompanied by ultra-thick raft foundations. The thickness of raft foundations is relatively large, generally reaching 5 meters or more. In the construction of the steel bars on the side wall of the shaft, due to the large thickness of the raft on the side wall of the elevator shaft, the amount of reinforcement on the side wall of the elevator shaft is large, and the weight of the steel bars is also heavy. The weight of each steel bar generally has to reach 100kg-150kg. Cannot be installed manually

[0003] Due to the extra-thickness of the raft on the side wall of the elevator shaft, which can generally reach more than 10m, it is too dangerous to hoist the steel bars close to the side wall when hoists are used to hoist the steel bar upside down. In addition, the 1# and 2# tower cranes installed in the foundation pit (the size of the site is small and close to the side wall) In the urban area, only 2 tower cranes can be installed), the 2# tower crane cannot cover the position of the elevator shaft, the 1# tower crane is mainly responsible for lifting the on-site steel materials, steel structures, etc., and the use of the 1# tower crane to install the side wall reinforcement will cause the utilization rate of the tower crane to be too high Low, and will seriously affect the construction period

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