Steel foundation turnover method for super high-rise buildings with tower cranes

Abstract

The invention discloses a super high-rise building additional tower crane steel foundation transfer method. The method is characterized by comprising the following steps: (a) a steel drawer frame is designed; (b) after a tower crane finishes climbing, a lowermost additional tower crane steel foundation is exposed out; (c) before the next climbing of the tower crane, when the casting of floor concrete is selected, the tower crane is used for lifting the lowermost additional tower crane steel foundation on the steel drawer frame, and the additional tower crane steel foundation is lifted above two steel foundations on a core cylinder shearing force; and (d) the steps (b) and (c) are circulated to finish the transfer of super high-rise building additional tower crane steel foundations. Throughadjustment of the transfer method, the idle periods of the tower crane between two-time casting of the floor concrete are effectively used; the disassembly, the temporary storage and lifting and theinstallation of the lowermost tower crane steel foundation can be performed in the two idle periods; and the operations are repeatedly carried out to finish the transfer of the three additional towercrane steel foundations.

Description

Technical field [0001] The invention belongs to the field of super high-rise main structure engineering, and in particular relates to a method for turning over the steel foundation of a super high-rise building externally attached to a tower crane. Background technique [0002] With the development of society, there are more and more super high-rise buildings. In the construction industry, buildings above 100m in height are called super high-rise buildings. Existing super high-rise buildings generally adopt a core tube + outer frame structure, and the core tube is constructed before the outer frame structure during the construction process. Tower cranes that are convenient for construction are mostly attached to the shear wall of the core tube, and the tower crane is generally equipped with three steel foundations, supported by the two steel foundations above, and the bottom steel foundation is left on the shear wall of the core tube. When the tower crane climbs the next time, u...

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Problems solved by technology

[0004] 1. Since the external tower crane climbs each time, the entire turnover process from dismantling to reinstallation of the steel foundation needs to be carried out continuously. Unable to carry out other hoisting operations, seriously affecting the construction progress on site

[0005] 2. Since the bottom steel foundation is attached to the shear wall of the core tube, there is no space to provide a working surface here, so the outer frame construction here cannot be carried out, resulting in the 4-5 floors corresponding to the bottom steel foundation The construction progress is delayed on the side close to the steel foundation, which further delays the construction progress

At the same time, in the follow-up construction of the 4-5 floors corresponding to the bottom steel foundation, using the "pumping" method to pour concrete requires mortar to moisten the pipe, which requires cost, and the disposal of dross after moistening the pipe also requires cost; and, partition pouring More construction joints need to be left, and the treatment of construction joints also requires cost

To sum up, the attachment of the bottom steel foundation to the shear wall of the core tube will not only delay the construction progress, but also greatly increase the construction cost

[0006] 3. Affected by the bottom steel foundation, the highest construction surface of the outer frame structure cannot exceed the bottom steel foundation. The construction progress of the outer frame structure is limited by the bottom steel foundation of the tower crane, which will easily lead to the core tube and the bottom steel foundation. The height difference of the outer frame structure is too large, which affects the safety of structural construction

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