Anti-pulling steel pipe pile structure supplemented on existing structure foundation slab and construction method of anti-pulling steel pipe pile structure

Abstract

The invention belongs to the field of constructional engineering, and particularly relates to an anti-pulling steel pipe pile (including rectangular steel pipe piles and circular steel pipe piles) structure supplemented on an existing structure foundation slab. The anti-pulling steel pipe pile structure supplemented on the existing structure foundation slab comprises the existing structure foundation slab, pile pressing holes are formed in the existing structure foundation slab, the steel pipe piles are pressed in foundation soil under the existing structure foundation slab through the pile pressing holes, and pile driving construction is conducted through the pile pressing holes after pile pressing is completed. By means of the anti-pulling steel pipe pile structure, the characteristic that the existing structure has certain bearing capacity can be sufficiently utilized, the temporary construction safety supporting measure does not need to be taken, the construction cost is reduced, and the construction efficiency is also improved; damage to the existing structure is little, and use of normal functions of existing buildings does not need to be suspended; and the improving effect of the anti-floating bearing capacity of the transformed structure foundation slab is obvious, the requirements for use safety, durability and seismic ductility can be met, and the application range iswide.

Description

technical field [0001] The invention belongs to the field of construction engineering, and in particular relates to a supplementary uplift-resistant steel pipe pile structure on the base plate of an existing structure and a construction method thereof. The steel pipe piles include rectangular steel pipe piles and circular steel pipe piles. Background technique [0002] With the rapid development of urban construction, the super-large basement structure has been widely used, which has brought many new technical problems to the design and construction of the project, among which the anti-floating problem of the basement is particularly prominent. Insufficient estimation of the groundwater level will directly lead to a certain degree of damage to the basement structure, which requires a series of reinforcement measures. [0003] Steel pipe pile features: small cross-section, small volume of extruded soil, strong penetration capacity of pile sinking, high bearing capacity, and e...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing foundation anti-floating reinforcement technology, such as repairing bored piles and increasing ballast, there are generally problems such as poor anti-floating effect, construction is greatly affected by environmental conditions, high construction cost, and reduced seismic performance after reinforcement.

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