Formwork system for top longitudinal beam and mid-span buckling arch of PBA underground excavation station and construction method

A formwork system and top longitudinal beam technology, applied in earthwork drilling, shaft lining, tunnel lining, etc., can solve problems such as long installation time, large labor demand, dangerous installation and dismantling, etc., reduce operating personnel and solve labor problems Intensity, the effect of reducing the probability of accidents with mass casualties and casualties

Inactive Publication Date: 2021-01-15
BCEG CIVIL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a formwork system for the roof longitudinal beam and mid-span buckle arch of the PBA underground excavation s

Method used

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  • Formwork system for top longitudinal beam and mid-span buckling arch of PBA underground excavation station and construction method
  • Formwork system for top longitudinal beam and mid-span buckling arch of PBA underground excavation station and construction method
  • Formwork system for top longitudinal beam and mid-span buckling arch of PBA underground excavation station and construction method

Examples

Experimental program
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Embodiment Construction

[0044] like Figure 1-4 As shown, the formwork system of the roof longitudinal beam and mid-span buckle arch of this PBA underground excavation station is installed in the excavated pilot tunnel 1; in the pilot tunnel 1, longitudinal support beams are respectively arranged on both sides of the bottom of the vault 2;

[0045] The formwork system includes side guide rails 3, middle guide rails 4, trolley 5, buckle arch formwork structure, beam bottom formwork structure 6, beam side formwork structure 7 and side support frame 8; the middle guide rail 4 is installed in the guide hole 1 at a position between two longitudinal support beams 2 to be poured; the side guide rails 3 are installed on both sides of the bottom of the guide hole 1 and are respectively located at outer positions of the longitudinal support beams 2 to be poured;

[0046] The trolley 5 is installed on the intermediate rail 4, and the bottom of the intermediate rail 4 is provided with a first sleeper 9; the bot...

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Abstract

The invention discloses a formwork system for a top longitudinal beam and a mid-span buckling arch of a PBA underground excavation station. The formwork system comprises side guide rails, a middle guide rail, a trolley, a buckling arch formwork structure, a beam bottom formwork structure, a beam side formwork structure and side supporting frames; the trolley is mounted on the middle guide rail; afirst formwork bracket is arranged at the top of the trolley; a horizontal oil cylinder is connected between the first formwork bracket and the trolley; the buckling arch formwork structure comprisesa top formwork and side formworks; the side supporting frames are mounted on the side guide rails, and second formwork supports are arranged at the tops of the side supporting frames; the beam side formwork structure is mounted on the second formwork bracket; the beam bottom formwork structure is installed on the bottom face of a to-be-poured longitudinal supporting beam, and the two sides of thebeam bottom formwork structure are connected with the side formworks and the beam side formwork structure correspondingly; and joints between the beam bottom formwork structure and a first vertical section as well as between the beam bottom formwork structure and a second vertical section are sealed correspondingly. The technical problems that a traditional formwork system is long in installationtime, large in labor demand and large in installation and detachment risk are solved.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering construction, and in particular relates to a formwork system and a construction method for a top longitudinal beam and a mid-span buckle arch of a PBA underground excavation station. Background technique [0002] In the subway PBA station, the second lining buckle arch of the guide tunnel needs to be completed together with the longitudinal beams on both sides. Usually, the full house bracket is used as the formwork support system for structural construction. Commonly used are fastener type, bowl button type and disc button type full house bracket. The full house support system consists of small steel formwork panels, secondary corrugated (I-beam), main corrugated (square wood or I-beam) and full house supports. The full house support is generally composed of vertical and horizontal sweeping poles, vertical poles, horizontal bars and scissors. The installation of the full house bracket ...

Claims

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Application Information

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IPC IPC(8): E21D11/10
CPCE21D11/10
Inventor 杜昌隆马骐母贤辉刘希胜高帮星石广阔姜朋飞冯宝家孙延衡郑文宝
Owner BCEG CIVIL ENG
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