Open trench tunnel main structure tall side wall unilateral vertical mold and construction process thereof

Abstract

The invention discloses an open trench tunnel main structure tall side wall unilateral vertical mold and a construction process thereof. The open trench tunnel main structure tall side wall unilateral vertical mold comprises a right triangle-shaped profile steel triangular truss; an embedded foundation bolt is inclined at one side of the bottom of the profile steel triangular truss; multiple pressing beam channel steels are arranged on the profile steel triangular truss; a template is mounted at the outer side of the long edge of the right-angled edge of the profile steel triangular truss; multiple connecting devices are arranged between the profile steel triangular truss and the template; one ends of the connecting devices are positioned in the template at one side of the profile steel triangular truss; a transverse connecting steel pipe is mounted on the inclined edge of the profile steel triangular truss in the length direction; and an operation platform is mounted at the upper part of the profile steel triangular truss. The profile steel triangular truss and an embedded part are used as support systems of the template; the unilateral mold standing can be performed; a bracket is high in stability and excellent in water resistance; the steel pipe use level is low; the disassembly is convenient; enough sidesway and buoyancy resistance can be provided to the tunnel tall side wall template; the template construction precision is improved; and the construction efficiency and the engineering progress are greatly improved.

Description

technical field [0001] The invention relates to a side wall of a main structure of an open-cut tunnel and a construction process thereof, in particular to a single-side vertical formwork of a large side wall of the main structure of an open-cut tunnel and a construction process thereof. Background technique [0002] Under the premise that the engineering land is becoming increasingly tight, the foundation pit engineering is developing in the direction of deep, large, and close, followed by the form of vertical support being applied to construction more and more frequently. Due to the narrow operating space, the obvious The construction of the side wall of the main structure of the excavation tunnel cannot be realized by using double-sided formwork, and must use single-side formwork. [0003] The traditional single-side formwork technology uses steel pipes to build bent frames as the formwork support system. Through a series of engineering applications in recent years, it can...

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Problems solved by technology

[0002] Under the premise that the engineering land is becoming increasingly tight, the foundation pit engineering is developing in the direction of deep, large, and close, followed by the form of vertical support being applied to construction more and more frequently. Due to the narrow operating space, the obvious The construction of the side wall of the main structure of the excavation tunnel cannot be realized by using double-sided formwork, and must use single-side formwork

[0003] The traditional single-side formwork technology uses steel pipes to build bent frames as the formwork support system. Through a series of engineering applications in recent years, it can be found that it has major disadvantages: ① At present, China's infrastructure construction has short construction periods and heavy engineering tasks. , The characteristics of the long construction line, while the traditional one-sided vertical formwork process uses a large number of steel pipes, a long erection period, and a large disassembly workload, which seriously affects the construction efficiency of the side wall, and it is difficult to meet the actual requirements of the project for the construction period; ② Due to The volume of the side wall is large, and the lateral pressure and buoyancy force are extremely large during the concrete pouring process. However, the single-side vertical formwork technology of the traditional steel pipe bent frame has a low height of the primary formwork, and the phenomenon of formwork floating and expansion is very easy to occur, resulting in the concrete wall. Surface flatness, verticality, etc. have defects, which affect the quality and image of the project; ③Affected by its own structural form, the traditional single-side vertical formwork technology needs to pull bolts, and the application of the pull bolts will affect the side wall of the main structure. The waterproof performance has a great impact, causing waterproof hidden dangers, and the construction quality is difficult to guarantee

For the wall formwork with a higher height, the traditional single-side formwork technology is more difficult to construct

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