Excavation blind area pretreatment method and tunnel excavation construction method

A tunnel boring machine and pretreatment technology, which is applied in the pretreatment of blind areas in excavation and tunnel excavation construction, can solve the problems of excavation path deviation, boring machine topping, etc., and achieve the effect of convenient removal

Active Publication Date: 2021-04-13
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to provide a tunnel excavation construction method, which is used to solve the problems of excavation path deviation and tunneling machine topping during the non-circular cross-section tunnel excavation construction process of bedrock strata using traditional construction methods

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  • Excavation blind area pretreatment method and tunnel excavation construction method
  • Excavation blind area pretreatment method and tunnel excavation construction method
  • Excavation blind area pretreatment method and tunnel excavation construction method

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specific Embodiment 1

[0067]It is an object of the present invention to facilitate a stratum tunneling machine (non-circular:, but not limited to, rectangular, horseshoe, etc.) in a stratospheric, partial rock or pile foundation. Digging in the blind zone, and the blind zone is unable to cut into, which in turn makes a deviation of the digging path of the excavator, and even the problem of dying, and provides a new tunnel excavation construction method.

[0068]CombineFigure 1-14In this embodiment, through the geological exploration of the tunneling position, it is determined that the position of the base rock 3 in the soft soil 20 is determined, and the shaped section tunneling, the selection of the excavation machine needs to maximize the efficiency of the later digging machine. Stable excavation, and the shaped cross-sectionalging machine should have a stirring device, a foam injection system, and a bentonite improvement system, ensuring that the stabilization effect of the soil pressure or mud water bal...

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Abstract

The invention relates to an excavation blind area pretreatment method and a tunnel excavation construction method. The tunnel excavation construction method specifically comprises the steps that firstly, an excavation blind area of a special-shaped section tunneling machine is pretreated through the excavation blind area pretreatment method, and then special-shaped section tunneling construction is conducted; and the pretreatment method specifically comprises the steps that the position where bed rock invades in the excavation blind area is determined, and then the bed rock at the position is pretreated, wherein pretreatment comprises the step that the bed rock at the position is crushed. In the abovementioned way, before special-shaped section tunneling construction, the bed rock which has adverse effects on tunneling of the special-shaped section tunneling machine in the excavation blind area is crushed, invasion of the bed rock in the excavation blind area is eliminated, and normal tunneling construction is guaranteed.

Description

Technical field[0001]The present invention relates to a tunnel construction method, and more particularly to a pretreatment method of excavation blind zone and a tunnel traction construction method.Background technique[0002]With the rapid development of urban construction, the demand for urban underground space development is increasing, and the tunnel traction is required to face the cross-section and the formation of the formation is getting higher and higher. During the construction of the underground tunnel, it often encounters geological conditions such as soft and local rock, which invaded the tunnel trailer, and often cause a certain Adverse effects. For the conventional circular full-section hard rock tunnel, it is easy to cause the shield mold cutter wear, affecting the efficiency of the eye and the life of the cutter. For non-circular (odoric) section, it is more serious about the adverse effects caused by the excavator. Due to the restriction of the cutting machine disc i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E02D9/00
CPCE21D9/001E02D9/00E21D9/00E21F15/00
Inventor 范磊刘娇孙恒贺飞冯战勇徐姣姣薛广记
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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