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Shield structure formed by shallow tunneling method in air-pressure mode

A technology of shallow buried underground excavation and air pressure mode, which is applied in mining equipment, earthwork drilling, tunnels, etc., can solve problems such as excessive wear of cutter heads, unsuitable manual excavation, poor geological stability, etc., to reduce maintenance rate, The effect of improving working time and work efficiency and reducing failure rate

Inactive Publication Date: 2012-10-03
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many difficulties in the construction of the Beijing stratum, mainly reflected in: rich boulders, difficult cutting of the cutterhead, which can easily cause excessive wear of the cutterhead and cutter, increase the tool change maintenance time of the equipment; improve the reliability of the equipment The tool change time and failure rate of downtime and poor geological stability can easily cause stratum collapse, which is not suitable for manual excavation; it affects the normal excavation and construction management of equipment, and delays the tunnel penetration time and urban traffic pressure

Method used

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  • Shield structure formed by shallow tunneling method in air-pressure mode
  • Shield structure formed by shallow tunneling method in air-pressure mode
  • Shield structure formed by shallow tunneling method in air-pressure mode

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment one: see figure 1 , figure 2 and image 3 , the air pressure mode shallow buried undercover excavation method shield includes a cylindrical front shield 6, a cylindrical middle shield 7 and a cylindrical back shield 8. The support shell 1 inside the cylindrical middle shield 7 drives the cylinder The propulsion system 9 etc. that the shield advances in shape. Wherein, a support partition is provided at the junction of the cylindrical front shield 6 and the cylindrical middle shield 7 , and the support partition is divided into a front partition 105 and a rear partition 106 . The front partition 105 is located between the cylindrical front shield 6 and the cylindrical middle shield 7, and the rear partition 106 is located inside the cylindrical middle shield. The front bulkhead 105 and the rear bulkhead 106 are sealed and fixed together to form a sealing device 8 , a through hole 81 is arranged on the top plate of the sealing device 8 and an openable and c...

Embodiment 2

[0042] Embodiment two: accompanying drawing is not drawn, can refer to Figure 4 , the content is basically the same as that of Embodiment 1, and the similarities will not be repeated. The difference is that the excavator is only mounted on the rear bulkhead in an up-and-down mode, that is, the rear end of the outer sleeve of the excavator is hinged on the rear bulkhead Or be hinged on the fixed bracket that the back bulkhead is provided with, the front end of the outer sleeve is hinged with one or two up and down pulling oil cylinders, and the other section of the up and down pulling oil cylinders is hinged on the back bulkhead or on the fixed bracket that the rear bulkhead is provided with. This solution is suitable for parallel installation of multiple excavators, and each excavator performs up and down excavation.

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Abstract

The invention discloses a shield structure formed by a shallow tunneling method in an air-pressure mode. The soil tunneling performed by a tunneling machine in the existing cutter disk cutting mode is changed to be in a mining arm tunneling mode. The supporting mode performed by existing cutter disks is changed to be performed by slotting tools and supporting baffle plates. The number of the slotting tools and the supporting baffle plates is determined according to the diameter of a tunnel and the stratum. According to the stability of the stratum, two excavation modes including an open tunneling mode and an air pressure balance tunneling mode can be realized, so that the failure rate of equipment in the area rich in large floating rocks is lowered. Therefore, the repair rate of the equipment is lowered, and the work time and the work efficiency of the tunneling machine are improved.

Description

technical field [0001] The invention relates to a special engineering machine for tunnel excavation construction, in particular to a shield tunneling method of shallow burial and underground excavation in air pressure mode. Background technique [0002] Tunnel boring machine is a kind of special engineering machinery for tunnel boring construction. Modern tunnel boring machine integrates optical, mechanical, electrical, hydraulic, sensing and information technologies. It has the functions of excavating soil, conveying soil, assembling tunnel lining, measuring Guidance correction and other functions have been widely used in subway, railway, highway, municipal, hydropower and other tunnel projects. At present, the domestic tunnel boring machine construction application technology can be roughly divided into three types of strata, the weak stratum mainly represented by Shanghai and Zhengzhou; the sand stratum, sandy pebble stratum and weathered rock and other soft and hard stra...

Claims

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Application Information

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IPC IPC(8): E21D9/08E21D9/12E21D9/093
Inventor 蒲晓波张宁川赵华卓兴建贺飞刑泊马哲
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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