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Jacking device of tunnel measuring hole and construction method thereof

The technology of a jacking device and a construction method is applied in tunnels, earth-moving drilling, mining equipment, etc., and can solve the problems of construction engineering accidents, affecting engineering construction efficiency and engineering progress, and the inability to successfully complete the tunnel penetration work due to large cumulative errors. Achieve the effect of improving error control, high construction efficiency and small error

Inactive Publication Date: 2013-03-20
天津第三市政公路工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the construction of long-distance shield tunneling, due to the accumulation of measurement errors, it is no longer possible to complete the tunnels with a length of more than 1,500 linear meters from the side of the station simply by contacting the measurement orientation to meet the requirements of the penetration measurement tolerance. Measurement Specifications (GB50308-2008) and the requirements of the construction plan will easily lead to large accumulated errors and the failure to complete the tunnel penetration work, seriously affecting the construction efficiency and progress of the project and other technical problems, and even causing other construction accidents, etc.

Method used

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  • Jacking device of tunnel measuring hole and construction method thereof
  • Jacking device of tunnel measuring hole and construction method thereof
  • Jacking device of tunnel measuring hole and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A jacking device for a tunnel measuring hole, including a pre-embedded part, a water stop ring, a steel pipe and a jack; The bottom is supported by jack 4. The jack 4 is supported by the oil cylinder support 1, and the bottom is provided with a steel running board 3.

[0042] The embedded part is composed of a limit steel ring 14 and a jacking bit 7. The jacking bit 7 is composed of a jacking bit cap 7.1 and a jacking bit support steel ring 7.2. The limit steel ring 14 is located under the jacking bit cap 7.1, and Jacking drill bit supports steel ring 7.2 outsides. The upper end surface of the limiting steel ring 14 in contact with the jacking drill cap 7.1 is provided with a sealing groove, and an O-shaped sealing ring 11 is housed in the sealing groove.

[0043] The water stop ring is composed of an upper water stop ring 15 and a lower water stop ring 9, the upper water stop ring 15 and the lower water stop ring 9 are respectively composed of a limit steel plate and...

Embodiment 2

[0045] A construction method for jacking up a tunnel measuring hole, including the embedding of embedded parts, the fixed installation of the jacking equipment frame, the installation of the water stop ring, and the jacking process of steel pipe welding:

[0046] Embedding of embedded parts: embed the embedded parts in the segment in advance, weld the steel bars around the segment firmly, and add reinforcing ribs at the opening; then fill the gap with fine stone concrete;

[0047] Fixed installation of the jacking equipment frame: install the jacking equipment, which is supported and fixed by the cylinder bracket; the jacking equipment is a 100-300 ton double-stroke jack, the jack stroke is 3-5m, and a steel running board is installed at the bottom of the jack.

[0048] Water stop ring installation: the water stop ring is nested and installed on the steel pipe, and assembled together by tensioning mechanism;

[0049] Steel pipe welding jacking: use seamless steel pipe, steel p...

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Abstract

The invention relates to a jacking device of a tunnel measuring hole and a construction method thereof. The invention belongs to the technical field of tunnel measurement. The jacking device of the tunnel measuring hole is characterized by comprising a pre-embedded part, a seal ring, a steel pipe and a jack; the pre-embedded part is pre-embedded inside a duct segment and sleeved at the end part of the steel pipe; the seal ring is sleeved at the outer side of the steel pipe; the seal ring is connected with the pre-embedded part, and the lower part of the steel pipe is supported by the jack. The jacking construction method of the tunnel measurement hole is characterized by comprising the processes of embedding the pre-embedded part, fixedly installing a jacking device frame body, installing the seal ring, and welding and jacking the steel pipe. The jacking device has the advantages of being simple in structure, convenient to construct, wide in application range, high in construction efficiency and the like. Error control of late tunnel breakthrough is greatly improved by this method; zero error of a planimetric position of a tunnel breakthrough gesture is finally achieved, and the breakthrough accuracy of long-distance tunnel excavation is also guaranteed.

Description

technical field [0001] The invention belongs to the technical field of tunnel measurement, in particular to a jacking device for a tunnel measurement hole and a construction method thereof. Background technique [0002] At present, in the construction of long-distance shield tunneling, due to the accumulation of measurement errors, it is no longer possible to complete the tunnels with a length of more than 1,500 linear meters from the side of the station simply by contacting the measurement orientation to meet the requirements of the penetration measurement tolerance. The measurement specification (GB50308-2008) and the requirements of the construction plan will easily lead to large accumulated errors and the failure to complete the tunnel penetration work, seriously affecting the construction efficiency and progress of the project and other technical problems, and even causing other construction accidents. Contents of the invention [0003] The invention provides a tunnel...

Claims

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Application Information

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IPC IPC(8): E21D9/00
Inventor 贾明浩胡灿辉涂杰吴冬贾利亨孙玉王明玥王淑苗
Owner 天津第三市政公路工程有限公司
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