A construction method for assembling trolley formwork with gradually changing section of tunnel arch wall lining

Abstract

The invention belongs to the technical field of tunnel construction and relates to a trolley formwork for tunnel arch wall lining fracture surface gradual change and a splicing construction method. The trolley formwork comprises a trolley for serving as main supporting of the trolley formwork, an original trolley formwork body is arranged on the outer side of the trolley, a formwork body is spliced on the outer side of the original trolley formwork body through a plurality of formwork supports, and the original trolley formwork body and the trolley, the formwork supports and the original trolley formwork body as well as the formwork supports and the formwork body are fixed through bolts. The mounting method of the trolley formwork comprises the steps that (1) lining normal section formwork trolley positioning is conducted, gradual change section formwork in position is conducted, and gradual change section formwork bodies are conveyed to a site in a classified mode according to preset serial numbers; (2) the gradual change section formwork bodies are mounted; and (3) mounting and checking are conducted. The trolley formwork for tunnel arch wall lining fracture surface gradual change and the splicing construction method have the beneficial effects that integrality of the formwork is ensured, and the supporting strength is improved; meanwhile mounting and dismounting are easy and convenient; the lining clearance size and the appearance quality are ensured; and normal circular construction in a tunnel is ensured.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and relates to a construction method for assembling a trolley formwork with gradual changes in the lining section of a tunnel arch wall. Background technique [0002] In the construction of tunnel arch wall lining, it is often encountered that the section is from normal section--gradient section--enlarged section--gradient section--normal section, and the lining of the normal section arch wall adopts a hydraulic formwork trolley as a support Formwork for construction. Usually in the tunnel lining, the lining trolley considers that the normal design section of the entire tunnel can meet the use before processing, but for the section gradient section and enlarged section, the traditional lining method often uses combined steel formwork and full scaffolding (arch frame plus Horizontal and vertical support) construction. The erection of scaffolding occupies the entire tunnel space, maki...

AI Technical Summary

Problems solved by technology

The erection of scaffolding occupies the entire tunnel space, making it impossible for vehicles to pass through, which affects the circulation construction in the tunnel; the scaffolding erection process is all manually carried out, which is labor-intensive, time-consuming, and laborious, and there are certain safety hazards; affected by the change and increase of the section, The footage of one construction is very short, and a section of enlarged section needs to be assembled and dismantled several times to complete

In addition, the template is easily deformed, it is difficult to guarantee the clearance size, and the appearance quality is poor

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