Superposed type cable well top plate structure and construction method thereof

Abstract

The invention relates to a cable well top plate structure and construction, in particular to a superposed type cable well top plate structure and a construction method thereof. The superposed type cable well top plate structure is characterized in that H-shaped steel main beams, channel steel secondary beams, steel plates and pouring concrete slabs are included; the two ends of each H-shaped steelmain beam are erected on L-shaped steps on the tops of the two side walls of a cable well, the channel steel secondary beams are located on the lower end faces of upper flanges of the H-shaped steelmain beams, the two ends of each channel steel secondary beam and the two adjacent H-shaped steel main beams are welded, the channel steel secondary beams are fully paved with the steel plates, and the steel plates are parallel to the H-shaped steel main beams; and anti-shear steel members are welded to the upper end faces of the upper flanges of the H-shaped steel main beams, the concrete slabs are poured on the H-shaped steel main beams and are fully paved with the steel plates, and the H-shaped steel main beams are connected to the cast-in-place concrete slabs through the anti-shear steel members. The cable well top plate structure and the construction method have the advantages that construction is facilitated, no scaffold needs to be erected in the construction process, the construction period can be effectively shortened, the construction efficiency is greatly improved, and the waterproof performance is ensured. In addition, a steel support frame is fully used, and the stress performance of the top plate is improved.

Description

technical field [0001] The invention relates to a roof structure and construction of a cable well, in particular to a superimposed cable well roof structure and a construction method thereof. Background technique [0002] The cable structure is an underground project, and the open-cut cable structure needs roof construction during construction. The construction method is based on the demolition mode and superimposed roof scheme in construction engineering. The details are: considering the thickness of the roof, it is necessary to set up scaffolding in the well first, etc. Auxiliary construction measures; secondly, the top of the scaffold is supported by a prefabricated formwork, and then a concrete roof is poured on the prefabricated slab. After the roof reaches the strength of the design requirements, the formwork can be removed, and then the support in the well is installed and constructed. The disadvantages of this construction method are: [0003] 1) During construction...

AI Technical Summary

Problems solved by technology

[0003] 1) During construction, due to the large thickness (250mm-400mm) and heavy weight of the roof, auxiliary construction measures such as scaffolding must be set up in the well to support the weight of the cast-in-place concrete roof during construction and molding, while inside the well The space is limited, so the construction is inconvenient, cumbersome and complicated, and the safety is difficult to guarantee;

[0004] 2) Since the scaffolding needs to cover the entire space in the well, during the roof construction period, that is, from the beginning of the scaffolding under the roof to the completion of the roof pouring, other construction projects, such as pipeline construction, cannot be carried out, and can only be constructed on the roof It is carried out before or after, which affects the construction period and reduces the construction efficiency;

[0005] In order to solve the above-mentioned problems of erecting scaffolding, the construction scheme of directly hoisting the prefabricated roof is also adopted in the prior art. The waterproof performance of the structure has higher requirements, especially the work well after laying a large number of auxiliary facilities or the work well where the joints are directly installed, the waterproof level is higher, but the gap formed by this prefabricated hoisting scheme is due to its deep depth. , The gap is long and difficult to deal with, so it is generally left untreated or treated with mortar, which results in insufficient waterproof performance during operation, and often has problems such as leakage, so the application rate is low; It will also bring problems in transportation, hoisting, etc.

Images