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A construction method for anti-cracking of side wall structure of underground rail transit

A technology for underground rail transit and side wall structure, applied in underwater structures, infrastructure engineering, artificial islands, etc., can solve problems such as concrete cracking, reduce hydration temperature rise, solve temperature cracks, and achieve obvious cooling effects. Effect

Active Publication Date: 2021-03-16
WUHAN MUNICIPAL CONSTR GROUP +1
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Problems solved by technology

[0004] The object of the present invention is to, aiming at the deficiencies of the prior art, provide a kind of anti-crack construction method for the side wall structure of underground rail transit, which combines materials and construction technology to solve the problem of the structural constraints of the side wall structure concrete due to the prior pouring and the concrete itself. Cracking problems caused by shrinkage deformation

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  • A construction method for anti-cracking of side wall structure of underground rail transit
  • A construction method for anti-cracking of side wall structure of underground rail transit
  • A construction method for anti-cracking of side wall structure of underground rail transit

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Embodiment Construction

[0035] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] like figure 1 and figure 2 As shown, the concrete pouring sequence of the underground rail transit structure with a two-story structure is bottom plate 1, negative second floor side wall 2, middle plate 7, negative first floor side wall 2, and roof 8; Figure 3 ~ Figure 5 The one-story structure of the underground rail transit side wall 2 structure shown includes a base plate 1 and a side wall 2, the base plate 1 is provided with a guide wall 5, and the pouring sequence is the base plate 1, the guide wall 5, the side wall 2, the middle plate 7 and top plate8. The construction method of the underground rail transit side wall 2 structure will be described below only by taking the base plate 1 and the side wall 2 of a one-story structure as examples.

[0037] An anti-crack constructio...

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Abstract

The invention discloses an anti-crack construction method for an underground rail transit side wall structure, which includes construction preparation: providing various structures and equipment required in the construction process; binding bottom plate steel bars and guide wall steel bars, installing base plate formwork and guide wall formwork and pre-embedding Bottom slab ventilation pipe; binding side wall reinforcement and installing side wall formwork and pre-embedding side wall ventilation pipe; preparing concrete; pouring bottom slab concrete pouring; Introduce hot air; carry out roof construction. The beneficial effects of the present invention are as follows: the present invention reserves ventilation pipes in the base plate formwork and the side wall formwork, and the cold air is introduced into the side wall ventilation pipes at the beginning of side wall concrete pouring, which can effectively reduce the temperature of the side wall concrete after it is molded, which is equivalent to The mold entry temperature of the concrete is lowered, especially before the concrete is finally set, its thermal conductivity is relatively large, and the cooling effect on the concrete is extremely obvious, which can effectively prevent the generation of cracks.

Description

technical field [0001] The invention relates to the technical field of underground structure construction, in particular to an anti-crack construction method for an underground rail transit side wall structure. Background technique [0002] The cracking of the concrete of the side wall structure of underground rail transit is very common in the solid engineering structure, and it is also a very difficult problem to solve and overcome in the field of concrete engineering. The cracking form of side wall structural concrete is dominated by temperature cracks, mainly because during the process of concrete temperature drop, the side wall structural concrete is strongly restrained by the bottom plate and guide wall structural concrete of the previous part, resulting in shrinkage and cracking. [0003] At present, the methods to reduce the temperature cracks of the underground side wall mainly include the additive method and the physical cooling method. Among them, the additive met...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/045C04B22/06
CPCC04B22/066E02D29/04E02D29/045
Inventor 蔡兵华李忠超张建亮吕远屈秦萼黄栋彭静陈亮
Owner WUHAN MUNICIPAL CONSTR GROUP
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