Complex terrain steep rock mass top-down tunnel portal tunnel entrance and construction method

A technology of complex terrain and construction methods, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems that the safety of construction workers cannot be well guaranteed, the requirements of construction workers are high, and the construction efficiency and quality are not high.

Active Publication Date: 2020-08-25
四川路桥盛通建筑工程有限公司
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Problems solved by technology

However, the current reverse tunnel entry construction technology cannot well guarantee the safety of construction personnel. Once problems such as rock falling occur during the construction process, the consequences will be

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  • Complex terrain steep rock mass top-down tunnel portal tunnel entrance and construction method
  • Complex terrain steep rock mass top-down tunnel portal tunnel entrance and construction method
  • Complex terrain steep rock mass top-down tunnel portal tunnel entrance and construction method

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0016] Those skilled in the art should understand that in the disclosure of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and The above terms should not be con...

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Abstract

The invention provides a complex terrain steep rock mass top-down tunnel portal tunnel entrance and a construction method. The complex terrain steep rock mass top-down tunnel portal tunnel entrance comprises a safety protection channel, a channel top falling stone prevention cleaning device, a temporary reinforcing device rapidly installed on the outer side of the protection channel, a lifting jacking rack inner supporting type steel arch correcting and auxiliary inverted arch suspended formwork system. The safety of constructors is effectively guaranteed in top-down construction, the construction difficulty is reduced in tunnel body construction, and the construction efficiency is improved. The invention further discloses a complex terrain steep rock mass top-down tunnel portal tunnel entrance construction method. The method which mainly comprises the steps of tunnel opening measurement, tunnel opening primary excavation, safety protection channel installation, tunnel top disposal, tunnel body excavation, steel arch frame erection, concrete spraying, inverted arch reinforcement cage binding, end formwork hoisting and inverted arch concrete construction. The construction efficiencyis high, manpower and working hours can be saved and good economic and technical benefits are achieved.

Description

technical field [0001] The invention relates to the field of tunnels, in particular to a construction system for tunnel doorway excavation in complex terrain and steep rock mass. Background technique [0002] With the construction and development of high-grade highways in our country, some complex terrain areas also need to open roads, and correspondingly, tunnels need to be excavated in these complex terrain areas. However, it is not an easy task to excavate high-grade highway tunnels in complex terrain, and it is necessary to fully consider the terrain characteristics and ensure the safety of tunnel excavation. [0003] Tunnel reverse entry construction technology is a new type of tunnel technology, especially suitable for tunnel excavation in complex terrain. Its biggest feature is that it avoids large excavation of earth and stone, minimizes the disturbance of construction to the mountain, and can effectively prevent Dangerous situations such as landslides and slope col...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/14E21D11/18E21D11/10E21D11/15E21D20/00
CPCE21D9/00E21D9/003E21D9/006E21D9/14E21D11/10E21D11/152E21D11/18E21D20/00
Inventor 冯利威马翔蔡昊良胡伟宋镜刘舒文刘兴陈越张小军陈菊龙飞孙颖
Owner 四川路桥盛通建筑工程有限公司
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