Method for constructing cavity foundation of super high-rise building

Abstract

The invention discloses a method for constructing a cavity foundation of an elevator shaft foundation pit of a super high-rise building. According to the method for constructing the cavity foundation of the super high-rise building, slope arrangement and ejector anchor supporting are conducted on the periphery of mass concrete, so that a formwork is formed, a steel channel is arranged on a bed course to serve as a stirrup for supporting, so that it is guaranteed that a steel reinforcement framework does not deform, the size is accurate, concrete pouring construction is conducted twice, a bottom solid base plate is poured when the concrete pouring is conducted for the first time, and a cavity structure is poured when the concrete pouring is conducted for the second time. Heat preservation and maintenance are conducted after the concrete pouring is completed, so that the surface temperature is prevented from falling too quickly, and concrete cracks are prevented. Due to the adoption of the cavity design, the effective section of the concrete can be well reduced, temperature cracks are prevented from being generated, the self weight of the structure is low, the construction period is shortened, and materials are saved.

Description

technical field [0001] The invention relates to the technical field of foundation engineering in construction engineering, and belongs to a construction method for a cavity foundation of an elevator shaft foundation pit of a super high-rise building. Background technique [0002] With the rapid development of the scale of economic construction, the modern construction industry is expanding towards high, large, deep and complex structures, which often involve large-volume concrete, such as high-rise buildings or large-scale equipment foundations, ultra-thick and super-large caps of pile foundations, water Work structure, etc. Its main feature is that it is large in size and has a large heat of cement hydration, which can easily cause concrete to crack due to the temperature difference between inside and outside exceeding 25°C, affecting the safe use of the structure and prolonging the construction period. Also there is no ideal construction treatment method in the prior art ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high bearing capacity, low-cost construction method for the cavity foundation of the elevator shaft foundation pit of super high-rise buildings, so as to solve the difficult problems in the construction process of large foundations in the construction process of construction projects, thereby ensuring construction safety and safety. quality, and overcome the deficiencies of the prior art

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