Basalt fiber grid reinforced lining structure for high ground temperature high-pressure hydraulic tunnel

A technology of basalt fiber and hydraulic tunnels, which is applied in water conservancy projects, hydropower, hydropower stations, etc., can solve problems such as cracking and endangering the stability of surrounding rocks, and achieve low construction cost, low engineering cost, and good crack resistance.

Inactive Publication Date: 2017-01-11
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a lining structure suitable for hydraulic tunnels operating under high internal water pressure conditions in high ground temperature areas, aiming to solve the problem of the currently widely used lining structure of concrete or reinforced concrete materials in high ground temperature and high internal water pressure. The problem of severe cracking and endangering the stability of surrounding rock under the combined action of pressure and load

Method used

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  • Basalt fiber grid reinforced lining structure for high ground temperature high-pressure hydraulic tunnel
  • Basalt fiber grid reinforced lining structure for high ground temperature high-pressure hydraulic tunnel
  • Basalt fiber grid reinforced lining structure for high ground temperature high-pressure hydraulic tunnel

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Embodiment 1

[0037] The basalt fiber mesh reinforced lining structure used in high-temperature and high-pressure hydraulic tunnels consists of primary lining, water-resisting layer and secondary lining in sequence from the surface of the surrounding rock of the tunnel to the tunnel wall.

[0038] The initial lining is a reinforced concrete layer;

[0039] The water-proof layer includes a concrete sealing primer layer on the surface of the initial lining outer wall and a polyurea elastomer layer on the outer surface of the concrete sealing primer layer;

[0040] The secondary lining is a reinforced concrete layer embedded with basalt fiber grids.

[0041] The basalt fiber grid is fixed with the hoop stress reinforcement in the secondary lining through the limit support.

Embodiment 2

[0043] The basalt fiber grid reinforced lining structure used in high-temperature and high-pressure hydraulic tunnels, from the surface of the surrounding rock of the tunnel to the tunnel wall, is the primary lining 1, the water-resisting layer 2 and the secondary lining 3,

[0044] The initial lining 1 is the initial lining of shotcrete, which is composed of shotcrete and steel mesh;

[0045] The water-proof layer 2 is a polyurea elastomer water-proof spray layer, which is composed of a roller-coated concrete sealing primer layer 2a and a spray-coated polyurea elastomer 2b on the outer wall surface of the initial lining;

[0046] The secondary lining 3 is a basalt fiber grid reinforced reinforced concrete secondary lining, which is composed of circumferential steel bars 3a, basalt fiber grid 3b for distribution network on the inner wall of the secondary lining, limit support 3c and concrete poured by formwork. 3d composition.

[0047] Wherein, the primary lining of sprayed c...

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Abstract

The invention discloses a basalt fiber grid reinforced lining structure for a high ground temperature high-pressure hydraulic tunnel. A primary lining, a water-resisting layer and a secondary lining are sequentially arranged from the surface of a tunnel surrounding rock to the wall of a tunnel, wherein the primary lining is a reinforced concrete layer, the water-resisting layer comprises a concrete sealing primer layer on the outer wall surface of the primary lining and a polyurea elastomer layer on the outer surface of the concrete sealing primer layer, and the secondary lining is a reinforced concrete layer with basalt fiber grids embedded inside. The basalt fiber grids with high tensile bearing capacity are assembled inside the secondary lining, the reinforced concrete linings are effectively reinforced by inhibiting generation of tension cracks, polyurea elastomer is sprayed to the outer wall of the sprayed concrete primary lining to serve as a water-resisting material, unfavorable action of heat conduction between the high-temperature surrounding rock and low-temperature high-pressure water can be reduced, and the basalt fiber grids and circumferential reinforcements jointly bear circumferential tensile force generated by temperature gradient and high-pressure water load when the hydraulic tunnel is in water filling operation.

Description

technical field [0001] The invention relates to a hydraulic tunnel lining structure, which is particularly suitable for the lining structure of high-pressure hydraulic tunnels in high ground temperature regions, and belongs to the technical field of water conservancy and hydropower engineering. [0002] technical background [0003] In the high-pressure (working water head greater than or equal to 100 meters) hydraulic tunnels built in areas with high ground temperature (the initial temperature of the rock mass is higher than 30 degrees Celsius), the water temperature is low and the temperature of the rock mass is relatively high during the first water operation. There is a temperature gradient of internal cooling and external heating, and the temperature gradient will cause hoop tensile stress in the lining; in addition, the high internal water pressure will also cause hoop tensile stress in the lining. Under the superimposed action of the hoop tensile stress produced by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B9/06
CPCE02B9/06Y02E10/20
Inventor 苏国韶鲁和彭立锋何保煜
Owner GUANGXI UNIV
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