Large karst cave and underground river arch span structure in tunnel and construction method

A technology for large-scale karst caves and tunnel structures, applied in arch bridges, bridge materials, bridge applications, etc., can solve the problems of difficult bridge construction and the existence of groundwater, and achieve the effects of good drainage performance, reduced engineering volume, and clear force

Pending Publication Date: 2019-05-31
ROAD & BRIDGE INT +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Backfill grouting is filled with gravel, soil and concrete, and is often used to deal with small karst caves and karst cavities; large karst caves and underground rivers have a large space and there is groundwater. In order to avoid a large amount of backfill and facilitate drainage, bridges are generally used to span, The construction of large karst caves and dark river bridges is relatively difficult

Method used

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  • Large karst cave and underground river arch span structure in tunnel and construction method
  • Large karst cave and underground river arch span structure in tunnel and construction method
  • Large karst cave and underground river arch span structure in tunnel and construction method

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Embodiment Construction

[0031] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0032] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention belongs to the technical field of tunnel spanning karst cave construction and discloses a large karst cave and underground river arch span structure in a tunnel and a construction method. The structure comprises complete bedrock, arches, a main arch ring, a backfill layer, a cave wall protection part and temporary structural steel supports; the arches are located at the portions, above the complete bedrock, of both sides of a karst cave and underground river, the cave wall protection part is arranged around the karst cave and the underground river, the main arch ring is supportedon the arches on both sides, and the backfill layer is arranged between an arch span structure body and an upper tunnel structure body; the temporary structural steel supports for tunnel constructionare divided into vertical temporary structural steel supports and longitudinal temporary structural steel supports, the longitudinal temporary structural steel supports are located below the tunnel structure body, an initial support steel frame of the tunnel falls onto the temporary structural steel supports, and the vertical temporary structural steel supports are adopted from the longitudinal temporary structural steel supports to the bottom of a karst cave. The arch span structure is simple and clear in stress force and has the advantages of high spanning ability and material adaptabilityand great durability.

Description

technical field [0001] The invention belongs to the technical field of tunnel spanning karst cave construction, and relates to a large karst cave and underground river arch span structure and construction method in a tunnel. Background technique [0002] During the construction of tunnels in mountainous areas, crossing karst caves, karst cavities and underground rivers are often encountered, and methods such as backfill grouting and bridge spanning are usually used to deal with them. Backfill grouting is filled with gravel, soil and concrete, and is often used to deal with small karst caves and karst cavities; large karst caves and underground rivers have a large space and there is groundwater. In order to avoid a large amount of backfill and facilitate drainage, bridges are generally used to span, The construction of large karst caves and dark river bridges is relatively difficult. Contents of the invention [0003] In view of this, the object of the present invention is...

Claims

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Application Information

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IPC IPC(8): E01D4/00E01D18/00E01D101/24
Inventor 李玲玉黄灿丁志刚陈松洲
Owner ROAD & BRIDGE INT
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