Pressure-resistant energy-dissipation seismic mitigation and isolation layer for tunnel seismic fortification measures

Abstract

The invention discloses a pressure-resistant energy-dissipation seismic mitigation and isolation layer for tunnel seismic fortification measures, specifically, the pressure-resistant energy-dissipation seismic mitigation and isolation layer is composed of an energy dissipation plate and pressure-resistant plates, a plurality of holes are uniformly formed in the energy dissipation plate, and the pressure-resistant plates matched with the hole diameter are arranged in the holes. According to the pressure-resistant energy-dissipation seismic mitigation and isolation layer for the tunnel seismic mitigation and isolation measure, after a tunnel is excavated, the surrounding rock generates convergence deformation, the pressure-resistant plate of the seismic mitigation and isolation layer can resist the convergence deformation of the surrounding rock, and the seismic mitigation and isolation layer is prevented from being compressed and compacted, losing the elastic recovery capacity or losing efficacy. When an earthquake occurs, the energy dissipation plate of the shock absorption and isolation layer can effectively absorb impact energy and can quickly restore to the original shape after being stressed and deformed, and the impact strength of surrounding rock on a tunnel structure is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering anti-seismic reduction, and in particular relates to a pressure-resistant energy dissipation and seismic isolation layer used for tunnel anti-seismic fortification measures. Background Art

[0002] In terms of underground structure seismic resistance, for a long time in the past, people believed that underground structures were constrained by the surrounding rock and had good seismic resistance, and did not pay attention to the research on seismic resistance and reduction measures of underground structure engineering. However, what caught people off guard was that in the Great Hanshin Earthquake in 1995, subway stations and tunnels and other different types of underground structures suffered large-scale damage, which attracted the attention of domestic and foreign researchers to the seismic resistance of underground structures. At present, domestic and foreign scholars focus on the seismic fortification technology of underground structures, and the seismic reduction and isolation technology of tunnels and underground structures, mainly surrounding rock reinforcement, changing structural performance and setting up seismic reduction and isolation systems.

[0003] The seismic isolation layer is an important measure for seismic fortification of tunnels and underground structures. However, during the construction of tunnels in areas with high water pressure and high ground stress, after the initial support, seismic isolation layer and secondary lining are completed, the tunnel often undergoes convergence deformation. The surrounding rock pressure generated by the convergence deformation applies a permanent load to the tunnel, causing the originally elastic seismic isolation material to be compressed and compacted, losing its elastic recovery ability or even failing. Therefore, it is necessary to design a tunnel seismic isolation layer that can withstand the static load pressure of the surrounding rock and absorb seismic loads, and can still maintain a good seismic isolation effect in environments with high water pressure, high ground stress or multiple strong earthquakes. Summary of the invention

[0004] In order to design a tunnel seismic isolation layer that can withstand the static load pressure of the surrounding rock and absorb the seismic load, the seismic isolation layer can select different types of seismic isolation layer materials according to the underground structure itself and the surrounding rock conditions to form a seismic isolation layer with pressure-resistant and energy-dissipating performance. The present invention provides a pressure-resistant and energy-dissipating seismic isolation layer for tunnel seismic fortification measures.

[0005] The present invention discloses a pressure-resistant energy dissipation and seismic isolation layer for tunnel seismic fortification measures, which specifically comprises an energy dissipation plate and a pressure-resistant plate, wherein a plurality of holes are evenly arranged on the energy dissipation plate, and pressure-resistant plates matching the hole size are arranged in the holes.

[0006] Furthermore, the energy dissipation plate and the pressure-resistant plate are firmly bonded and deform in coordination with each other.

[0007] Further, the material of the energy dissipation plate is but not limited to rubber, polyethylene foam, polyurethane foam and shape memory polymer.

[0008] Further, the pressure-resistant plate material is but not limited to polyurethane, polyethylene and polyamide.

[0009] Furthermore, the size and number of holes on the energy dissipation plate are determined according to the defense requirements and engineering design requirements.

[0010] Furthermore, the pressure-resistant energy dissipation and seismic isolation layer is installed on the primary support or secondary lining structure of the tunnel.

[0011] The beneficial technical effects of the present invention are:

[0012] The pressure-resistant energy dissipation and seismic isolation layer used in the tunnel seismic protection measures of the present invention is capable of resisting the convergence deformation of the surrounding rock after tunnel excavation, and preventing the seismic isolation layer from being compressed and compacted, losing its elastic recovery ability or becoming ineffective. When an earthquake occurs, the energy dissipation plates of the seismic isolation layer can effectively absorb the impact energy, and can quickly return to their original state after being deformed by force, thereby reducing the impact strength of the surrounding rock on the tunnel structure. Compared with general seismic isolation layers, the pressure-resistant energy dissipation and seismic isolation layer of the present invention enables the tunnel structure to still have good seismic resistance under the alternating action of static and dynamic loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the pressure-resistant energy dissipation and seismic isolation layer used for tunnel seismic fortification measures of the present invention.

[0014] Figure 2 It is a schematic diagram of the energy dissipation plate of the present invention.

[0015] Figure 3 It is a schematic diagram of the pressure-resistant plate of the present invention.

[0016] Figure 4 This is a diagram showing the installation effect of the pressure-resistant, energy-dissipating and seismic-isolating layer used in the tunnel seismic fortification measures of the present invention.

[0017] In the figure: 1-pressure-resistant energy dissipation and seismic isolation layer, 2-energy dissipation board, 3-pressure-resistant board, 4-primary support, 5-secondary lining. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] A pressure-resistant energy dissipation and seismic isolation layer structure for tunnel seismic protection measures according to the present invention is as follows: Figure 1 As shown, specifically: the pressure-resistant energy dissipation and seismic isolation layer 1 is composed of an energy dissipation plate 2 and a pressure-resistant plate 3. A plurality of holes are evenly opened on the energy dissipation plate 2, and the holes are filled with pressure-resistant plates 3 that match the hole size.

[0020] Furthermore, the energy dissipation plate 2 and the pressure-resistant plate 3 are firmly bonded to ensure that they can deform in coordination with each other to form a pressure-resistant, energy dissipation, and seismic isolation layer 1 .

[0021] Furthermore, the energy dissipation plate 2 is as follows Figure 2As shown, the energy dissipation plate 2 can be made of materials with good elasticity, softness, deformation and recovery of deformation, and the ability to absorb dynamic load energy and reduce structural vibration, such as rubber, polyethylene foam, polyurethane foam, shape memory polymer, etc.

[0022] Furthermore, the pressure-resistant plate 3 is as follows Figure 3 As shown, the pressure-resistant plate 3 can be made of a material with high elasticity, high strength, compressibility, tear resistance, and wear resistance, such as polyurethane, polyethylene, polyamide and other high-elasticity and high-strength polymers.

[0023] Furthermore, the size and number of holes on the energy dissipation plate 2 are determined according to defense requirements and engineering design requirements.

[0024] Furthermore, the pressure-resistant energy dissipation and seismic isolation layer 1 is installed on the tunnel primary support 4 or secondary lining 5 structure, and forms a defense system with the tunnel structure.

[0025] The specific implementation process is as follows:

[0026] (1) According to the defense requirements and engineering needs, select the appropriate hole diameter and number of holes to make holes in the energy dissipation plate 2.

[0027] (2) According to the hole diameter and number in the energy dissipation material 2, the pressure-resistant plate 3 is processed and manufactured.

[0028] (3) According to Figure 1 As shown, the pressure-resistant plate 3 is installed in the energy dissipation plate 2, and the two materials are firmly bonded to form a pressure-resistant energy dissipation and seismic isolation layer 1.

[0029] (4) Install the pressure-resistant energy dissipation and seismic isolation layer 1 on the tunnel structure so that the seismic isolation layer and the tunnel structure form a system. The installation effect is as follows: Figure 4 shown.

Claims

1. A pressure-resistant energy dissipation and seismic isolation layer for tunnel seismic fortification measures, characterized in that: The pressure-resistant energy dissipation and seismic isolation layer (1) is composed of an energy dissipation plate (2) and a pressure-resistant plate (3). The energy dissipation plate (2) is evenly provided with a plurality of holes, and the holes are filled with pressure-resistant plates (3) having a size matching the hole diameter.

2. The pressure-resistant energy dissipation and seismic isolation layer for tunnel seismic fortification measures according to claim 1 is characterized in that: The energy dissipation plate (2) and the pressure-resistant plate (3) are firmly bonded to each other and deform in coordination with each other.

3. The pressure-resistant energy dissipation and seismic isolation layer for tunnel seismic fortification measures according to claim 1 is characterized in that: The material of the energy dissipation plate (2) is but not limited to rubber, polyethylene foam, polyurethane foam and shape memory polymer.

4. The pressure-resistant energy dissipation and seismic isolation layer for tunnel seismic fortification measures according to claim 1 is characterized in that: The material of the pressure-resistant plate (3) is but not limited to polyurethane, polyethylene and polyamide.

5. The pressure-resistant energy dissipation and seismic isolation layer for tunnel seismic fortification measures according to claim 1 is characterized in that: The size and number of holes on the energy dissipation plate (2) are determined according to defense requirements and engineering design requirements.

6. The pressure-resistant energy dissipation and seismic isolation layer for tunnel seismic fortification measures according to claim 1 is characterized in that: The pressure-resistant energy dissipation and seismic isolation layer (1) is installed on the primary support (4) or secondary lining (5) structure of the tunnel.

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