WO2019184931A1

WO2019184931A1 - Structural system for use in underground neutron power station

Info

Publication number: WO2019184931A1
Application number: PCT/CN2019/079797
Authority: WO
Inventors: 何满潮; 杨晓杰; 乔亚飞; 王�琦; 刘国钊; 赵思奕
Original assignee: 何满潮
Priority date: 2018-03-29
Filing date: 2019-03-27
Publication date: 2019-10-03
Also published as: CN108343449A; CN108343449B

Abstract

A structural system for use in an underground neutron power station, the system comprising a main tunnel structural body (1) and at least one branch tunnel structural body (2) connected to one end of the main tunnel structural body (1), wherein the at least one branch tunnel structural body (2) is in communication with the main tunnel structural body (1), and a lining of the main tunnel structural body (1) and a lining of the branch tunnel structural body each have: a molded reinforced concrete layer (11), a sprayed concrete layer (12) and a bolt support structure (13) that are arranged successively from the inside to the outside, wherein a waterproof layer (14) is disposed between the sprayed concrete layer (12) and the molded reinforced concrete layer (11). The present structural system for use in an underground neutron power station may solve the construction safety and operational safety problems of the underground neutron power station, and may simultaneously meet requirements for the decommissioning and waste disposal of the underground neutron power station.

Description

Structural system for underground neutron power stations

Technical field

The invention relates to the field of underground energy structure and geological storage technology, in particular to a structural system for an underground neutron energy power station.

Background technique

Deep geological disposal is an effective geological storage method for waste. It refers to the burying of high-level waste in a stable formation with a depth of several hundred meters. It uses a multi-barrier isolation system combining engineering barrier and natural barrier to make it human living environment. isolation. The current deep geological disposal only considers physical storage of radioactive materials (eg, spent fuel and waste), requires complete containment, and it is generally recommended to use robots to complete backfilling, etc., without considering human accessibility and waste. The recyclability, therefore, the storage environment for deep geological disposal is the natural decay of radioactive materials, and is not suitable for underground neutron power stations that use radioactive materials to generate energy.

Conventional underground structural systems generally only need to meet the strength requirements and operational requirements, and almost do not involve structures that prevent nuclide migration, and do not apply to the operational requirements of underground neutron power plants.

Summary of the invention

The object of the present invention is to provide a structural system for an underground neutron power station, which can solve the construction safety and operational safety problems of an underground neutron power station, and can meet the requirements for decommissioning of underground neutron power stations and permanent disposal of waste materials. .

The above object of the present invention can be achieved by the following technical solutions:

The present invention provides a structural system for an underground neutron power station, comprising a main tunnel structure and at least one branch tunnel structure connected to one end of the main tunnel structure, the at least one branch tunnel structure and the The main tunnel structure is in communication with each other, wherein the lining of the main tunnel structure and the lining of the branch tunnel structure have:

A molded reinforced concrete layer, a shotcrete layer and a bolt supporting structure are disposed in order from the inside to the outside, and a waterproof layer is disposed between the shotcrete layer and the molded reinforced concrete layer.

The structure and advantages of the structural system for the underground neutron power station of the present invention are: the structural system for the underground neutron power station of the present invention satisfies the requirements for the construction and operation of the underground neutron power station, and can be realized in the underground. The integrated design of the construction, operation, decommissioning and waste storage of the sub-energy station can ensure the isolation of the underground neutron power station from the human living environment.

DRAWINGS

1 is a top plan view of a structural system for an underground neutron power station of the present invention.

Fig. 2 is a cross-sectional view showing the first embodiment of the cross section taken along the line A-A of Fig. 1.

Figure 3 is a cross-sectional view showing a second embodiment of the A-A cross section of Figure 1.

Figure 4 is a cross-sectional view showing a third embodiment of the A-A cross section of Figure 1.

Fig. 5 is an enlarged schematic view showing a partial lining of a main tunnel structure/branch tunnel structure of the present invention.

Fig. 6 is a front view showing the structure of a main tunnel structure and a shaft structure of the present invention.

Fig. 7 is a front view showing the structure of a branch tunnel structure and a shaft structure of the present invention.

Fig. 8 is a front view showing the structure of another branch tunnel structure and a shaft structure of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

As shown in FIG. 1 , the present invention provides a structural system for an underground neutron power station, including a main tunnel structure 1 and at least one branch tunnel structure 2 connected to one end of the main tunnel structure 1 At least one branch tunnel structure 2 is in communication with the main tunnel structure 1 , wherein the lining of the main tunnel structure 1 and the lining of the branch tunnel structure 2 each have a mold set in order from the inside to the outside A reinforced concrete layer 11, a shotcrete layer 12, and a bolt support structure 13, a waterproof layer 14 is disposed between the shotcrete layer 12 and the molded reinforced concrete layer 11.

Specifically, as shown in FIG. 2, in a feasible embodiment, the main tunnel structure 1 has a substantially circular cross section, that is, the main tunnel structure 1 has a cylindrical structure; as shown in FIG. In another possible embodiment, the main tunnel structure 1 has a substantially three-circular cross section; as shown in FIG. 4, in a further feasible embodiment, the main tunnel structure 1 has a substantially horseshoe cross section. Of course, in other embodiments, the cross section of the main tunnel structure 1 may also be other shapes, which is not limited herein.

Please refer to FIG. 1 , the main tunnel structure 1 is the core chamber of the underground neutron power station, which is generally a long strip-shaped diverticulum structure, and the main tunnel structure 1 is horizontally arranged below the ground, which is away from the ground. The vertical distance is not less than 70 m, that is, as shown in FIG. 6, the vertical distance H of the dome of the main tunnel structure 1 from the ground is not less than 70 m. In addition, the surrounding rock of the structural system for the underground neutron power station of the present invention requires selection of surrounding rock having certain ion adsorption capacity and thermal conductivity, thereby realizing complete isolation and underground of the underground neutron power station from the human living environment. The operation safety of the neutron power station.

At least one branch tunnel structure 2 is connected to one end of the main tunnel structure 1, the cross section of the branch tunnel structure 2 is the same as the cross section of the main tunnel structure 1, and is generally circular, horseshoe-shaped or three-circular, of course, In other embodiments, the cross section of the branch tunnel structure 2 may also be other shapes, which is not limited herein. In the present invention, the structural system for the underground neutron power station has two branch tunnel structures 2, and the two branch tunnel structures 2 are respectively connected to one end of the main tunnel structure 1, so that the system is used in the underground. The structural system of the sub-power station is generally Y-shaped. In the two branch tunnel structures 2, one of the branch tunnel structures 2 is used to place the ventilation distribution system 3 of the underground neutron power station, and the other branch tunnel structure 2 is used for placing the fuel of the underground neutron power station. Storage system 4. In the present invention, the branch tunnel structure 2 in which the fuel storage system 4 is placed is further provided with a screen door 5 for closing the branch tunnel to isolate the fuel storage system 4 from the outside. The branch tunnel structure 2 is generally in the form of a long strip-shaped diverticulum structure, and is horizontally arranged below the ground, and its vertical distance from the ground is not less than 70 m, that is, please refer to FIG. 7 and FIG. The vertical distance H of the dome of the structure 2 from the ground is not less than 70 m.

In the present invention, the lining of the main tunnel structure 1 and the lining of the branch tunnel structure 2 have substantially the same structural composition, and both linings include a second lining composed of a molded reinforced concrete layer 11 which is sequentially disposed from the inside to the outside. A preliminary lining composed of the shotcrete layer 12 and the anchor support structure 13 is provided with a waterproof layer 14 between the shotcrete layer 12 and the molded reinforced concrete layer 11.

Specifically, as shown in FIG. 5, the shotcrete layer 12 is formed of a steel arch 121 and concrete 122 sprayed on the steel arch 121. In this embodiment, a plurality of steel arches 121 are disposed in the sprayed concrete layer 12 along the length direction of the tunnel structure, and the spacing between adjacent steel arches 121 is 0.5m to 1.5m; The thickness h1 of the concrete layer 12 is 30 cm to 50 cm.

The reinforced concrete layer 11 is disposed on the inner side of the shotcrete layer 12, and the reinforced concrete layer 11 is cast and formed according to the specific shape of the main tunnel structure 1 and the branch tunnel structure 2, and the reinforced concrete layer is molded. 11 should be designed according to the reinforced concrete structure and bear all the surrounding rock loads, which should be determined comprehensively according to local geological and hydrological conditions. In the present embodiment, the molded reinforced concrete layer 11 has a thickness h2 of 20 cm to 50 cm.

The waterproof layer 14 is interposed between the molded reinforced concrete layer 11 and the shotcrete layer 12, and the waterproof layer 14 is used to block moisture in the underground rock formation to ensure an operating environment in the tunnel structure. In the present embodiment, the waterproof layer 14 is composed of a waterproof board and a geotextile which are laminated together, and the geotextile is joined to the shotcrete layer 12, and the waterproof board is joined to the molded reinforced concrete layer 11.

The bolt support structure 13 is composed of a plurality of anchor rods 131 arranged at intervals, and a plurality of anchor rods 131 are inserted into the shotcrete layer 12. In this embodiment, the length L of the anchor rod 131 is 3m to 5m, and the plurality of anchor rods 131 are arranged in a plum blossom shape. The specific size of the anchor rod 131 should be comprehensively determined according to the mechanical properties and geological conditions of the surrounding surrounding rock. This is not a limitation.

The lining of the branch tunnel structure 2 is similar to that of the main tunnel structure 1, but the thickness of the molded reinforced concrete layer 11 of the branch tunnel structure 2 can be appropriately reduced.

According to an embodiment of the present invention, as shown in FIG. 1 and FIG. 6, a shield door 5 is provided in the main tunnel structure 1, and the main tunnel structure 1 is divided into neutron energy by the screen door 5. The chamber 15 and the combined heat and power supply chamber 16 are provided. The neutron source system 6 and the energy generation system 7 for placing the underground neutron power station in the neutron energy chamber 15 and the cogeneration system for placing the underground neutron power station in the cogeneration chamber 16 . The screen door 5 can isolate the neutron ray and the nuclides from the outside.

Specifically, in order to realize the integrated design of the construction, operation, decommissioning and storage of the energy generation system 7 of the underground neutron power station, an energy generation system 7 for storing the underground neutron power station is provided below the main tunnel structure 1. The nuclides migrating barrier body 8 is located below the neutron energy chamber 15 and disposed adjacent to the cogeneration chamber 16. In the present invention, the anti-nuclear migration barrier body 8 has a lead powder concrete layer 81, a clay layer 82, a reinforced concrete layer 83, and a grouting layer 84 which are disposed in order from the inside to the outside, and the anti-nuclear migration barrier body 8 is further A surrounding rock formation located outside of the grouting layer 84 can be further included. The top of the anti-nuclear migration barrier body 8 is flush with the bottom of the main tunnel structure 1 and achieves a sealed connection with the main tunnel structure 1. In special cases, the top of the anti-nuclear migration barrier 8 can also be Above or below the bottom wall of the main tunnel structure 1, there is no limitation here.

According to an embodiment of the present invention, a reinforcing structure 17 is disposed below the main tunnel structure 1 , and the reinforcing structure 17 is located below the neutron energy chamber 15 and disposed adjacent to the anti-nuclear migration barrier body 8 , that is, the The reinforcing structure 17 is disposed below the neutron source system 6 for placing the underground neutron power station in the neutron energy chamber 15. In the present invention, the reinforcing structure 17 is a grouting solid 172 formed by grouting a plurality of grouting pipes 171 into the surrounding surrounding rock. The reinforcing structure 17 is used to control uneven settlement of the section for long-term operation. The plurality of grouting pipes 171 of the reinforcing structure 17 can be formed in the underground surrounding rock by drilling in the form of a plum-shaped cloth hole during the tunnel construction process, and the grouting amount should be controlled so as not to cause excessive stress on the tunnel bottom plate. Prevail. Of course, when the strength of the surrounding rock around the structural system for the underground neutron power station is high, the distribution is uniform along the tunnel direction, and the rheology is not obvious, the reinforcing structure 17 can be omitted. The grouting pressure and grouting amount can be comprehensively determined according to the geological and hydrological conditions of the surrounding rock. Of course, in other embodiments, the reinforcing structure 17 may also adopt a pile foundation or other structural system to control long-term uneven settlement of the section, which is not limited herein.

According to an embodiment of the present invention, the structural system for an underground neutron power station further has a shaft structure 9 disposed at a junction of the main tunnel structure 1 and the branch tunnel structure 2, the shaft structure 9 The main tunnel structure 1 and the branch tunnel structure 2 are respectively connected to each other.

Specifically, the cross-section of the shaft structure 9 is generally circular, and the shape of the square structure can also be partially used, and can be freely selected according to the construction space. The shaft structure 9 can be designed and constructed according to the general shaft specification, and the shaft structure 9 can be used. To realize the communication between the underground neutron power station and the ground, its structural form is reinforced concrete structure, and its structural thickness is determined comprehensively according to local geological conditions, hydrological conditions and construction level. In the better area of the stratum, it can be constructed in the form of digging with digging, steel grate, anchor and grouting are used as initial support, and then the internal concrete structure is constructed as a permanent structure. In the present embodiment, the shaft structure 9 is composed of a retaining structure 91 and a support structure 92 disposed within the retaining structure 91.

The structural system for the underground neutron energy power station of the invention satisfies the requirements for the construction and operation of the underground neutron power station, and can realize the integrated design of the construction, operation, decommissioning and waste storage of the underground neutron power station, and can ensure The isolation of the underground neutron power station from the human living environment.

The above is only a few embodiments of the present invention, and various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention.

Claims

A structural system for an underground neutron energy power plant, comprising: a main tunnel structure body and at least one branch tunnel structure connected to one end of the main tunnel structure body, the at least one branch tunnel structure body and the main body The tunnel structures are in communication, wherein the lining of the main tunnel structure and the lining of the branch tunnel structure have:

A molded reinforced concrete layer, a shotcrete layer and a bolt supporting structure are disposed in order from the inside to the outside, and a waterproof layer is disposed between the shotcrete layer and the molded reinforced concrete layer.
The structural system for an underground neutron power station according to claim 1, wherein said waterproof layer is composed of a waterproof board and a geotextile laminated together, said geotextile being joined to said shotcrete layer The waterproof board is in contact with the molded reinforced concrete layer.
The structural system for an underground neutron power station according to claim 1, wherein the anchor support structure is composed of a plurality of spaced apart anchor rods, and the plurality of anchor rods are inserted into the spray Concrete layer.
The structural system for an underground neutron power station according to claim 1, wherein the main tunnel structure is provided with a screen door, and the main tunnel structure is divided into a neutron energy chamber by the screen door. And cogeneration room with cogeneration.
The structural system for an underground neutron power station according to claim 4, wherein an anti-nuclear migration barrier for sequestering an energy generating system of the underground neutron power station is provided below the main tunnel structure The anti-nuclear migration barrier is located below the neutron energy chamber.
The structural system for an underground neutron power station according to claim 5, wherein the lining of the anti-nuclear migration barrier has a lead-pulverized concrete layer, a clay layer, a reinforced concrete layer, which are arranged in order from the inside to the outside. Grouting layer and surrounding rock layer.
The structural system for an underground neutron power station according to claim 4, wherein a reinforcing structure is disposed below the main tunnel structure, and the reinforcing structure is located in the neutron energy chamber for placing The lower part of the neutron source system of the underground neutron power station.
The structural system for an underground neutron power station according to claim 7, wherein the reinforcing structure is a grouting and solid formed by grouting a plurality of grouting pipes into the surrounding surrounding rock.
The structural system for an underground neutron power station according to claim 1, wherein said structural system for an underground neutron power station further has a shaft structure, and said shaft structure is disposed in said main tunnel structure At a junction of the branch tunnel structure, the shaft structure is in communication with the main tunnel structure and the branch tunnel structure, respectively.
The structural system for an underground neutron power station according to claim 1, wherein the structural system for the underground neutron power station has a vertical distance from the ground of not less than 70 m.
The structural system for an underground neutron power station according to claim 1, wherein the main tunnel structure has a circular, horseshoe or triple arch shape; the branch tunnel has a circular cross section. Horseshoe or three round arches.