Energy-saving rapid construction method for ventilating shafts of tunnels

A construction method and tunnel ventilation technology, which are used in shaft equipment, well sinking, earthwork drilling, etc., to achieve the effects of improving utilization, increasing the number of excavation cycles, and shortening exposure time.

Active Publication Date: 2012-08-15
中铁十七局集团第三工程有限公司
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Problems solved by technology

[0014] The present invention provides an energy-saving and rapid construction method for tunnel ventilation shafts in order to

Method used

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Embodiment Construction

[0030] The energy-saving and rapid construction method of the tunnel ventilation shaft, the steps are as follows: a. Measure and locate the position of the shaft; b. Reinforce the geology of the shaft mouth; Tunneling to the vertical shaft position until it communicates with the vertical slag discharge hole; c. The method of combining drilling and blasting is used to excavate the shaft; d. When the shaft is excavated to a certain depth, the second lining construction is carried out on the upper part of the shaft, and the construction of the second lining is consistent with that of the shaft The construction is carried out simultaneously; e. Install shaft ventilation equipment.

[0031] The specific steps for the secondary lining construction on the upper part of the shaft are as follows: a. Clean and reinforce the wall seat through the construction hanging pan; b. Install and consolidate the well-shaped I-shaped steel beam on the lower half of the wall seat; c. Install the bot...

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Abstract

The invention specifically relates to an energy-saving rapid construction method for ventilating shafts of tunnels, which solves the problem that shortcomings exist in the construction on the existing ventilating shafts of tunnels by using a downward driving method. The method comprises the following steps of: a, measuring the position of a positioned shaft; b, carrying out strengthening construction on the geologic status of a shaft mouth, meanwhile, excavating a vertical ballast-discharge hole downwards from the shaft mouth, and carrying out excavation from the front hole of a tunnel to the position of the shaft until the excavating position meets the vertical ballast-discharge hole; c, carrying out shaft excavation by using a drilling and blasting combined method; d, when the shaft is excavated to a certain depth, carrying out secondary lining construction on the upper part of the shaft, wherein the secondary lining construction and the shaft construction are performed synchronously; and e, installing a shaft ventilating device. According to the invention, through adopting a mode of carrying out equidirectional and synchronous operation flow on the shaft excavation construction and the shaft secondary-lining construction, the method has the significant advantages of small safety risk, high construction speed, high working efficiency, energy saving, consumption reduction, easiness in construction drainage in shafts, low comprehensive construction cost, and capabilities of reducing the equipment investment, saving the occupied land and the cost of ecological restoration engineering, and obviously improving the construction work environment.

Description

technical field [0001] The invention relates to the construction technology of a tunnel ventilation shaft, in particular to an energy-saving and rapid construction method for a tunnel ventilation shaft. Background technique [0002] The air quality in the tunnel of expressways and railway long tunnels has dropped significantly during the operation phase, so ventilation shafts (generally 6-10m in diameter) are designed to replace the air in the tunnel to improve the air quality. [0003] At present, the engineering field mostly adopts the front shaft method, and its construction sequence is: drilling and blasting excavation from top to bottom, and temporary support of the shaft wall; [0004] At present, most of the excavation methods used are: drilling and blasting excavation, temporary support, vertical lifting of dregs, discarding dregs nearby, setting up protection projects to prevent water and soil loss, and restoration of natural vegetation and greening projects in dreg...

Claims

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Application Information

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IPC IPC(8): E21D1/00E21D5/04E21D5/12
Inventor 王新民孙修德曹会芹邓华军王华
Owner 中铁十七局集团第三工程有限公司
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