Tunnel ventilation vertical shaft wellbore construction device and method

Abstract

A tunnel ventilation vertical shaft wellbore construction device is composed of a vertical shaft construction device body and a middle partition plate construction device body. The vertical shaft wellbore construction device body is an umbrella-shaped drilling rig rock drilling machine; the middle partition plate construction device body comprises a construction hanging scaffold and a formwork; construction of a wellbore middle partition plate adopts the fabricated formwork; the middle partition plate construction hanging scaffold is a six-layer hanging scaffold, wherein a first-layer hangingscaffold body and a second-layer hanging scaffold body are double-layer hanging scaffold body of an integral structure, and a third-layer hanging scaffold body, a fourth-layer hanging scaffold body, afifth-layer hanging scaffold body and a sixth-layer hanging scaffold body are each a split-type symmetric-crescent-shaped temporary hanging scaffold body; the first-layer hanging scaffold body and the second-layer hanging scaffold body are provided with fully-closed guardrails and skirting boards; folding hinges for facilitating erecting of the formwork are arranged at the positions, adjacent tothe partition plates, of the third-layer hanging scaffold body, the fourth-layer hanging scaffold body, the fifth-layer hanging scaffold body and the sixth-layer hanging scaffold body; guardrails andskirting boards are arranged at the positions, close to the wellbore, of the third-layer hanging scaffold body, the fourth-layer hanging scaffold body, the fifth-layer hanging scaffold body and the sixth-layer hanging scaffold body; middle partition plate pouring spaces are reserved in the first-layer hanging scaffold body and the second-layer hanging scaffold body; and gaps between the two crescent-shaped discs of the crescent-shaped third-layer hanging scaffold body, the crescent-shaped fourth-layer hanging scaffold body, the crescent-shaped fifth-layer hanging scaffold body and the crescent-shaped sixth-layer hanging scaffold body serve as middle partition plate pouring spaces of the third-layer hanging scaffold body, the fourth-layer hanging scaffold body, the fifth-layer hanging scaffold body and the sixth-layer hanging scaffold body.

Description

technical field [0001] The invention relates to a shaft construction method, in particular to a construction method for a tunnel ventilation shaft shaft and a middle partition. Background technique [0002] In recent years, the pace of my country's high-grade highway construction has been accelerating, and ventilation shafts are installed in extra-long tunnels to improve the environment and safety of the tunnels. Tunnel ventilation shafts are mostly dual-purpose in function, that is, a middle partition is installed inside the circular section to divide the shaft into two equal parts or four parts that are not equal, so as to meet the requirements of the two driving directions of the road tunnel. Air supply and exhaust needs. Usually, the shaft of the ventilation shaft adopts the initial support of anchor net cable spraying and the secondary lining concrete support, which determines that the initial support must be completed first during construction, and then the secondary ...

AI Technical Summary

Problems solved by technology

In terms of structure, the middle partition of the shaft and the shaft are lined at the same time, and the integrity of the structure is good; in terms of project cost, the investment is relatively low, but in terms of construction speed, the initial support takes a long time, and the construction period is relatively long. Longer, resulting in slow construction speed; In terms of safety, it is difficult to deal with the cracking of sprayed concrete in the initial support, and the falling of concrete blocks is a source of danger in construction

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