Erecting construction method for basement outer wall pre-counter-pull bent frame single-side formwork supporting system

Abstract

The invention discloses an erecting construction method for a basement outer wall pre-counter-pull bent frame single-side formwork supporting system in the technical field of constructional engineering. The erecting construction method for the basement outer wall pre-counter-pull bent frame single-side formwork supporting system comprises the following steps that step 1, before the formwork supporting system is erected, outer side basement outer wall steel bars are bound, and the outer side steel bars are fixed by supporting points to prevent overturning. The construction method has the beneficial effects that the hidden danger of leakage of the basement outer wall can be well eradicated by adopting the construction method, erection of a formwork system can be completed only by adopting conventional steel pipe fasteners, the erection process is convenient to operate, the steel pipe cage is formed by fixing pre-buried ground anchor short steel pipes and cross rods and vertical rods, the horizontal cross rods at the bottom and the upper part are reversely pulled through steel wire ropes every several spans, so that the lateral stress of the formwork system can be counteracted, and the overall stability of the formwork system is ensured. The construction process is novel and worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a construction method for erecting a single-side formwork system of a pre-reversed bent frame on a basement exterior wall. Background technique [0002] With the rapid development of the construction industry, super high-rise buildings have sprung up. More and more super high-rise buildings continue to seek benefits from the underground space. Before the construction of the basement, deep foundation pit excavation and foundation pit support construction are required. As the depth of the foundation pit With the continuous increase, the difficulty of construction is also increasing, and the waterproof requirements are also getting higher and higher. Foundation pit support often adopts reinforced concrete support piles and internal support beam system. After the construction of this type of support system is completed, it is often encountered that the basement exter...

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Problems solved by technology

Foundation pit support often adopts reinforced concrete support piles and internal support beam system. After the construction of this type of support system is completed, it is often encountered that the basement exterior wall is too close to the side wall of the foundation pit, and some exterior walls are even close to the side of the foundation pit. The conventional double-sided formwork system cannot be used when pouring the exterior wall of the basement, and the single-side formwork system is generally used. However, in order to ensure the overall stability of the formwork system in most single-side formwork systems, it is necessary to set the wall-through screw on the formwork It is fixed to the side wall of the foundation pit. After the screw is removed, there will often be local leakage in the screw hole of the side wall of the foundation pit, resulting in water seepage on the outer wall, and it is not convenient to plug the leak later.

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