Pressure-bearing type lining capillary drainage system

Abstract

The utility model discloses a pressure-bearing type lining capillary drainage system, and relates to water conveyance projects, in particular to a pressure-bearing type lining capillary drainage system which is stable in structure, high in universality and good in waterproof and drainage effect. The drainage structure is arranged in a lining structure and comprises a capillary drainage belt, non-woven geotechnical cloth and drainage pipes, the capillary drainage belt is annularly arranged in the 110-degree range of a top arch of the lining structure, the two drainage pipes are symmetrically and longitudinally arranged at the two ends of the capillary drainage belt, and the two ends of the capillary drainage pipe are bent and then inserted into the drainage pipes from openings of the drainage pipes. The non-woven geotextile is laid between the capillary drainage pipe and the lining structure. The pressure-bearing type lining capillary drainage system is stable in structure, high in universality, good in waterproof and drainage effect, capable of effectively reducing external water load acting on a tunnel lining structure, capable of guaranteeing reliability and effectiveness of a permanent drainage system of the tunnel lining structure, capable of improving safety of a tunnel in the construction period and the operation period, and capable of reducing construction cost. The permanent capillary drainage system of the pressure-bearing lining structure is suitable for special geological conditions.

Description

Technical Field

[0001] The utility model relates to a water conveyance project, in particular to a pressure-bearing lining capillary drainage system with stable structure, strong versatility and good waterproofing and drainage effect. Background Art

[0002] How to ensure effective drainage measures for the lining structure during the construction and operation of the water diversion tunnel, thereby improving the stress conditions of the lining concrete, is a key technical issue that needs to be solved urgently.

[0003] When dealing with tunnel drainage problems, the usual treatment method is to adopt a drainage-based approach. Drainage measures have played a significant role in reducing the effect of external water on the lining structure, and can ensure that the external water pressure on the tunnel lining structure is significantly reduced or even eliminated. However, traditional tunnel lining structure drainage measures also have certain shortcomings. When passing through special geological conditions such as mudstone, faults or water corrosion, tunnels that adopt traditional drainage treatment methods may cause problems such as damage or blockage of the drainage system during operation due to their special geological conditions, thereby affecting the stability of the tunnel lining structure and even causing serious safety problems, resulting in economic losses and casualties. Summary of the invention

[0004] The utility model aims to solve the problem that the drainage measures of traditional lining structures are easily damaged and blocked when passing through special geological conditions such as mudstone, faults or water corrosion, which affects drainage and poses a safety hazard. The utility model provides a pressure-bearing lining capillary drainage system with stable structure, strong versatility and good drainage effect.

[0005] The utility model provides a pressure-bearing lining capillary drainage system, which is characterized in that the drainage system is arranged in a lining structure, and comprises a capillary drainage belt, a non-woven geotextile and a drainage pipe. The capillary drainage belt is arranged circumferentially within a 110-degree range of the top arch of the lining structure, and two drainage pipes are symmetrically arranged longitudinally at both ends of the capillary drainage belt. The two ends of the capillary drainage pipe are bent and inserted into the drainage pipe from the drainage pipe opening, and the non-woven geotextile is laid between the capillary drainage pipe and the lining structure.

[0006] The capillary drainage belts are spaced 3m apart along the axis of the cave, and the grooved surfaces of the capillary drainage belts point toward the water-facing surface.

[0007] The capillary drainage belt and the non-woven geotextile are fixed on the lining structure at equal intervals by using steel nails or nails.

[0008] The lining structure of the utility model adopts a pressure-bearing lining. The tunnel section passing through mudstone or fault adopts a capillary drainage belt arranged in a circumferential direction within a range of 110 degrees of the top arch. The two ends of the capillary drainage belt are correspondingly connected to a 40mm PVC drainage pipe to form a tunnel lining structure drainage and pressure reduction system. The capillary drainage belt is made of polyvinyl chloride PVC, and the water flow rate is not less than 100cm3 / (m*s). The capillary drainage belt is provided with dense grooves with large inside and small outside along the entire longitudinal section to form a capillary water collection hole groove drainage channel. Secondly, the capillary drainage belt should not have joints within the specification range. At the same time, the capillary drainage belt should have a smooth surface, neat edges, and no cracks, mechanical damage, creases and other usage defects.

[0009] By comprehensively utilizing capillary drainage tapes, non-woven geotextiles, PVC drainage pipes and lining structures, for pressure-bearing tunnels under special geological conditions, capillary drainage tapes are arranged within the lining in a certain range and overlap manner to increase the drainage capacity of the lining structure and reduce the external water load, thereby achieving the purpose of reducing the external water load acting on the tunnel lining structure and ensuring the permanent, reliable effectiveness of the tunnel drainage system, thereby avoiding tunnel safety problems.

[0010] The pressure-bearing lining capillary drainage system of the utility model has a stable structure, strong versatility, and good drainage effect. It can effectively reduce the external water load acting on the tunnel lining structure and ensure the reliability and effectiveness of the permanent drainage system of the tunnel lining structure, thereby improving the safety of the tunnel during the construction and operation periods. It is a permanent capillary drainage system for pressure-bearing lining structures suitable for special geological conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model.

[0012] Figure 2 It is a cross-sectional view of the capillary drainage zone.

[0013] Figure 3 Schematic diagram of drainage arrangement for pressure lining tunnel section.

[0014] Among them, there are capillary drainage belt 1, non-woven geotextile 2, and drainage pipe 3. DETAILED DESCRIPTION

[0015] Embodiment 1: A pressure-bearing lining capillary drainage system is arranged in a lining structure, comprising a capillary drainage belt, a non-woven geotextile and a drainage pipe. The capillary drainage belt is arranged circumferentially within a 110-degree range of the top arch of the lining structure. Two drainage pipes are symmetrically arranged longitudinally at both ends of the capillary drainage belt. Both ends of the capillary drainage pipe are bent and inserted into the drainage pipe from the drainage pipe opening. The non-woven geotextile is laid between the capillary drainage pipe and the lining structure.

[0016] The capillary drainage belt is arranged at a distance of 3m along the tunnel axis, and the grooved surface of the capillary drainage belt points to the water-facing surface. The capillary drainage belt and non-woven geotextile are fixed to the lining structure at equal intervals using steel nails or nails.

[0017] The capillary drainage belt is arranged in a circumferential manner within a range of 110 degrees in the top arch of the tunnel section passing through mudstone or faults. The two ends of the capillary drainage belt are connected to the corresponding Φ40mm PVC drainage pipe to form a tunnel lining structure drainage and pressure reduction system. The capillary drainage belt is made of polyvinyl chloride PVC, and the water flow rate is not less than 100cm3 / (m*s). The capillary drainage belt is opened along the entire longitudinal section with dense grooves that are larger inside and smaller outside to form a capillary water collection hole groove drainage channel. Secondly, the capillary drainage belt should not have joints within the specification range. At the same time, the capillary drainage belt should have a smooth surface, neat edges, and no cracks, mechanical damage, creases and other usage defects.

[0018] By comprehensively utilizing capillary drainage tapes, non-woven geotextiles, PVC drainage pipes and lining structures, for pressure-bearing tunnels under special geological conditions, capillary drainage tapes are arranged within the lining in a certain range and overlap manner to increase the drainage capacity of the lining structure and reduce the external water load, thereby achieving the purpose of reducing the external water load acting on the tunnel lining structure and ensuring the permanent, reliable effectiveness of the tunnel drainage system, thereby avoiding tunnel safety problems.

Claims

1. A pressure-bearing lining capillary drainage system, characterized in that The drainage system is arranged in the lining structure, including a capillary drainage belt, a non-woven geotextile and a drainage pipe. The capillary drainage belt is arranged circumferentially within a 110-degree range of the top arch of the lining structure. Two drainage pipes are symmetrically arranged longitudinally at both ends of the capillary drainage belt. The two ends of the capillary drainage pipe are bent and inserted into the drainage pipe from the drainage pipe opening. The non-woven geotextile is laid between the capillary drainage pipe and the lining structure.

2. The pressure-bearing lining capillary drainage system according to claim 1, characterized in that The capillary drainage belts are spaced 3m apart along the axis of the cave, and the grooved surfaces of the capillary drainage belts point toward the water-facing surface.

3. The pressure-bearing lining capillary drainage system according to claim 1, characterized in that The capillary drainage belt and the non-woven geotextile are fixed on the lining structure at equal intervals by using steel nails or nails.

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