Double-curved arch supporting structure used for underground engineering and construction method

A technology for supporting structure and underground engineering, applied in underground chambers, earthwork drilling, wellbore lining, etc., can solve the problems of many processes, difficult to meet design requirements, heavy structure, etc., to improve the construction progress, shorten the operation time, Ensure the effect of construction safety

Inactive Publication Date: 2017-06-27
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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  • Double-curved arch supporting structure used for underground engineering and construction method
  • Double-curved arch supporting structure used for underground engineering and construction method
  • Double-curved arch supporting structure used for underground engineering and construction method

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] Below in conjunction with accompanying drawing concrete description:

[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 p...

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-curved arch supporting structure used for underground engineering and a construction method and relates to the field of underground engineering. The double-curved arch supporting structure is located between surrounding rock and a hole body and comprises an arc-shaped arch and an inverted arch. The arc-shaped arch is matched with the hole body in annular radian, and the longitudinal surface of the arc-shaped arch is in a wave shape. Compared with an existing supporting material, the double-curved arch supporting structure and a flat plate unit supporting structure use materials with the same quality, machined members have the same length. The bending resistance ability of double-curved arch units can reach certain ten times as large as that of flat plate units. The double-curved arch structure adopts factory prefabricating, so that the supporting operation time of constructors in underground space is shortened. Further, wave-shaped grooves in the outer surface of an arc-shaped arch serve as drainage channels, so that water outlet holes do not need to be constructed, construction difficulty of the underground space is reduced, and the safety assurance of operators is improved while the construction time is shortened.

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 Applications(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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