Bridge bearing structure passing through huge karst cave and construction method of bridge bearing structure

A technology for load-bearing structures and bridge structures, which is used in earth-moving drilling, shaft equipment, wellbore lining, etc., can solve problems such as affecting the safety of tunnel engineering operations, cracking and damage of tunnel structures, and uneven stress on tunnel structures, so as to avoid post-construction settlement. Large, high reliability, dynamic and static load transfer dispersion effect

Pending Publication Date: 2020-07-14
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, when tunnels span karst caves, waste slag backfilling is generally used to deal with them. However, for giant karst caves, the depth of which is tens of meters or even hundreds of meters. Disorders such as uneven force, cracking and damage seriously affect the operation safety of tunnel engineering
Therefore, it is of grea

Method used

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  • Bridge bearing structure passing through huge karst cave and construction method of bridge bearing structure
  • Bridge bearing structure passing through huge karst cave and construction method of bridge bearing structure
  • Bridge bearing structure passing through huge karst cave and construction method of bridge bearing structure

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Embodiment 1

[0043] See Figure 1-Figure 9 . The embodiment of the present invention provides a load-bearing structure of a bridge passing through a giant karst cave 10, which includes a bridge structure 1 and a protective structure.

[0044] See image 3 and Figure 4 . Among them, the protective structure includes a first layer of protective structure and a second layer of protective structure. The first layer of protective structure includes open tunnel structure 6, support beam one 701, support beam two 702, support beam support one 801 and support beam support two. 802. The second layer of protection structure includes anchor net spray structure 4 and vertical long anchor cable 5 support.

[0045] Specifically, the anchor net and shotcrete structure 4 and the vertical long anchor cable 5 support the surrounding rock on the top of the cave 10. By setting the vertical long anchor cable 5, it is ensured that the large rock mass at the top of the cave 10 can be anchored. The combination of...

Embodiment 2

[0069] The embodiment of the present invention provides a load-bearing structure of a bridge passing through a giant karst cave 10. The difference from Embodiment 1 is that in this embodiment, a shed structure is used instead of the open cave structure 6 in Embodiment 1.

[0070] In this embodiment, the shed structure is a reinforced concrete member or a steel structural member.

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Abstract

The invention relates to the field of tunnel and underground engineering, in particular to a bridge bearing structure passing through a huge karst cave and a construction method of the bridge bearingstructure. The bridge bearing structure comprises a bridge structure and a protection structure, the protection structure comprises a first supporting beam and a second supporting beam, and further comprises an open cut tunnel structure or a shed tunnel structure, the first supporting beam crosses the karst cave, the two ends of the first supporting beam are arranged on stable foundations on the two sides of the karst cave, the second supporting beam crosses the karst cave, the two ends of the second supporting beam are arranged on the stable foundations on the two sides of the karst cave, thetwo sides of the lower part of the open cut tunnel structure or the shed tunnel structure are fixed to the first supporting beam and the second supporting beam correspondingly, the bridge structure is arranged in the open cut tunnel structure or the shed tunnel structure and crosses the karst cave, and the two ends of the bridge structure are arranged the stable foundations on the two sides of the karst cave. The construction method is used for constructing the bridge bearing structure. Compared with a traditional method for crossing the karst cave through a backfilling method, the karst caveis continuously crossed through prestressed concrete, construction is convenient, the structure is reliable, and the defect of large settling after construction due to tunnel slag backfilling of thehuge karst cave is avoided.

Description

Technical field [0001] The invention relates to a tunnel and underground engineering, in particular to a bridge bearing structure and a construction method for crossing a giant karst cave. Background technique [0002] Since the beginning of the 21st century, with the rapid development of my country’s railway construction, more and more high-standard double-track railways have been constructed at speeds above 200km per hour. Especially in the central and western mountainous areas, the route selection is affected by large curve radii and complex terrain and geological conditions. Restricted by various factors, the scale of tunnels is increasing rapidly, and there are more and more tunnels crossing karst. When the tunnel straddles a large karst cave, it is very likely to cause foundation collapse and structural damage due to the imperfect backfill or suspension of the foundation. Therefore, an effective bearing structure must be adopted to ensure the safety of the tunnel during cons...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/15E21D20/00
CPCE21D11/10E21D11/152E21D20/00
Inventor 郑杰元卿伟宸龙杰朱勇喻渝汪勇郑伟邸成刘明付敏王能王健宏
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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