Method for constructing tunnel by utilizing shield empty-pushing crossing mine method

A technology of tunnel construction and mining method, which is applied in the direction of tunnels, tunnel linings, mining equipment, etc. It can solve the problems of excessive manpower, slow construction progress, and high construction costs, and achieve good economic benefits, save construction costs, and reduce operating personnel.

Active Publication Date: 2012-04-25
CHINA RAILWAY NO 2 ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristics of this construction method, in terms of construction progress: due to the large workload of spraying pea gravel in front of the cutter head and pulling the segment in the hole, it requires more manpower, the construction cycle is long, and the construction progress is slow; in terms of construction quality Aspects: Since there is no object providing counterforce in front of the cutter head during the propulsion process of the shield, the segments are easy to loosen, causing the segments to be easily misplaced and damaged, and the waterproof effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] A long-distance air-lifting shield tunnel construction method through a mine section includes the following steps:

[0021] The first step, end wall construction

[0022] After the construction of the underground excavation section is completed, end wall reinforcement shall be carried out on the arrival and departure ends of the tunneling to prevent the entry of groundwater and ensure the stability of the initial support of the underground excavation section. According to the engineering materials, geological conditions, and economic conditions, the end wall construction can adopt a variety of construction methods. At present, the two most commonly used methods are glass fiber reinforcement + sprayed concrete and plain sprayed concrete:

[0023] , Glass fiber reinforcement + shotcrete end wall

[0024] (1) In order to ensure the stability of the initial support of the underground excavation section when the shield machine enters the air-propelled section from the pure shield se...

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PUM

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Abstract

The invention discloses a method for constructing a tunnel by utilizing a shield empty-pushing crossing mine method. Gravels are paved in advance on an empty-pushing section, thereby being short in construction period; the gravels are stacked and filled in front of a cutter, a counter force is provided when the shield is in a tunneling process, and duct pieces are not fixed by structural steel; most clearances between the duct pieces and rock are filled with the gravels, thereby reducing work load and promoting tunneling efficiency; enough counter force is supplied by a jack for splicing the duct pieces, a water-stopping bar is excellently pasted and a waterproof effect is excellent; the duct pieces can be filled and compacted in time, the duct pieces after being spliced cannot float upward, and damaged and over-loaded staggered slabs do not exist; the grout amount on the back of the duct pieces is reduced and the construction cost is saved; and the tunneling efficiency is greatly promoted, the production value within a unit time is high and the economic benefit is excellent.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel construction method of shield tunneling through a mine method. Background technique [0002] In order to ensure the smooth advancement of the shield tunnel, the mining method is used to excavate the extremely hard rock tunnel first, and then the shield tunnel pushes the assembled segments through, commonly known as the shield tunnel push. : After the first ring is advanced, stop the excavation and weld in front of the cutter head to provide support for the reaction force. After the segment is assembled, pass the front of the cutter head to the pea gravel behind the segment, and at the same time inject grout into the back of the segment through the lifting hole of the segment , before the next ring advances, the segments are connected by multiple steel sections to ensure that the segment water-stop strips are closely attached. The characteristics of this cons...

Claims

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Application Information

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IPC IPC(8): E21D9/093E21D11/38E21D11/14C04B28/00
Inventor 陈强卿三惠段绍和王家祥罗石宝何齐海
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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