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A double-curved arch support structure and construction method for underground engineering

A support structure and underground engineering technology, applied in underground chambers, earthwork drilling, shaft equipment, etc., can solve problems such as many processes, difficulty in meeting design requirements, and heavy structures, so as to improve construction progress, shorten operation time, The effect of ensuring construction safety

Inactive Publication Date: 2019-10-18
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mine method and TBM method mostly use composite lining or single-layer lining by spraying, injection molding, etc., with bulky structure, high rigidity, many processes, and high consumption. The support effect is not good under special geological conditions, and it is difficult to meet the design requirements.

Method used

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  • A double-curved arch support structure and construction method for underground engineering
  • A double-curved arch support structure and construction method for underground engineering
  • A double-curved arch support structure and construction method for underground engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Example 1: In this example, a tunnel is taken as an example. The stratum around the tunnel is unstable, the surrounding rock type is IV, the cracks are developed, and the water richness is average. The tunnel width is 10m, and the double-curved arch structure is used as the composite lining. initial support.

[0063] Describe in detail below in conjunction with accompanying drawing:

[0064] Such as figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, a double-curved arch support structure for underground engineering includes a surrounding rock 1, a double-curved arch support structure 2, and a cave body 3. The double-curved arch support structure 2 is located between the surrounding rock 1 and the cave body 3. A secondary lining 7 is constructed between the double-curved arch support structure 2 and the cave body 3. The double-curved arch support structure 2 includes an arc-shaped arch 4 connected by a plurality of double-curved arch units 6 and a concrete pou...

Embodiment 2

[0075] Example 2: In this example, the roadway is taken as an example. The formation around the cave is stable, the surrounding rock type is II, the cracks are relatively developed, and the water-rich property is weak. The width of the tunnel is 4m, and the service life of the roadway is 1 to 3 years. , the double-curved arch structure is used as a single-layer lining support.

[0076] Such as figure 1 As shown, a double-curved arch support structure for underground engineering includes a surrounding rock 1, a double-curved arch support structure 2 and a cave body 3. The double-curved arch support structure 2 is located between the surrounding rock 1 and the cave body 3, and other The structure is as described in Example 1.

[0077] The construction method of using the double-curved arch structure 2 as a single-layer lining support: includes the following steps:

[0078] Step 1: Determine and prefabricate the double-curved arch unit 6 with a specification of 800mm×1800mm acc...

Embodiment 3

[0084] Embodiment 3: In this embodiment, a tunnel is taken as an example. The stratum around the tunnel is unstable, the surrounding rock type is IV, the cracks are developed, and the water abundance is average. The tunnel width is 10m.

[0085] Such as image 3 As shown, a double-curved arch support structure for underground engineering uses the double-curvature arch support structure 2 as permanent support, and an initial support 8 is constructed between the double-curvature arch support structure 2 and the surrounding rock 1 .

[0086] The above-mentioned double-curved arch structure 2 is used as the construction method of the secondary lining of the composite lining: comprising the following steps:

[0087] Step 1: Determine and prefabricate the double-curved arch unit 6 with a specification of 800mm×1800mm according to the grade of surrounding rock, the magnitude of the load, the excavation contour line of the cave body, and the excavation method;

[0088] Step 2: Perfor...

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Abstract

The invention discloses a double-curvature arch support structure and a construction method for underground engineering, and relates to the field of underground engineering. The double-curvature arch support structure is located between surrounding rock and a cave body, and includes arc arches and inverted arches. The circular arc of the arc-shaped arch matches the circular arc of the cave body, and the longitudinal surface of the arc-shaped arch is wavy. Compared with the existing supporting materials, the double-curved arch support structure of the present invention uses the same quality material and is processed into members with the same length. The bending resistance of the double-curved arch unit can reach dozens of times that of the flat plate unit, and The double-curved arch structure adopts factory prefabrication, which shortens the time for construction personnel to support the underground space. Further, the wavy grooves on the outer surface of the curved arch are used as drainage channels, eliminating the need for construction of water discharge holes, which reduces the difficulty of construction in the underground space. The construction time is shortened while the safety of the operators is improved.

Description

technical field [0001] The invention relates to the field of underground engineering, in particular to a double-curved arch structure used in the construction of underground engineering such as tunnels and a construction method thereof. Background technique [0002] At present, underground engineering construction is mainly divided into open excavation method and concealed excavation method. The shape of underground engineering constructed by open excavation method is mainly rectangular foundation pit and circular shaft. Among them, the urban rail transit is mainly rectangular foundation pit. As far as the circular wellbore is concerned, its stress state is not good. Underground excavation methods are represented by mining methods, shield tunneling methods, and TBM methods. Among them, shield tunneling methods are mostly applied to soil strata, and circular segment support is the main method. Mine method and TBM method mostly adopt composite lining or single-layer lining by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/18E21D11/38E21D11/10E21D20/00E21F16/02
Inventor 孙克国仇文革许炜萍
Owner SOUTHWEST JIAOTONG UNIV
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