Nuclear engineering underground pipe gallery and construction method thereof

Abstract

The invention relates to the technical field of underground passages, and discloses a nuclear engineering-related underground pipe gallery which comprises a pipe gallery main body, the pipe gallery main body comprises a plurality of pipe gallery sections and a secondary pouring section; wherein the pipe gallery section comprises a plurality of prefabricated sections, and the multiple prefabricated sections are connected in an anchoring mode; the number of the secondary pouring sections is multiple, and any two adjacent pipe gallery sections are connected through one secondary pouring section in a pouring mode. The invention provides a nuclear engineering underground pipe gallery and a construction method thereof. The problems that nuclear engineering underground pipe gallery construction is large in environmental influence, large in manpower demand and high in safety risk can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of underground passage structures, and in particular to underground pipe galleries for nuclear engineering and construction methods thereof. Background Art

[0002] The nuclear engineering pipe gallery, that is, the pipeline corridor in the nuclear power plant, is the main place for the centralized laying of large-scale pipelines. It is mainly used to transmit electricity, heat energy, cooling water and other media to ensure the safe and stable operation of the nuclear power plant. The pipe gallery is composed of columns, beams and trusses of steel or reinforced concrete structures, and various pipelines, cables, valves and other equipment are laid inside.

[0003] In the relevant technology, the design and construction method of underground pipeline corridors in nuclear projects is full cast-in-place design and construction. Due to the solidification of concrete, on-site wet operations require a large number of people to carry out long-term continuous operations. Not only is the workload large, but the gases released during the solidification process of the concrete and the residual operations have a great impact on the environment of the construction site. At the same time, wet operations have high safety risks. Summary of the invention

[0004] In view of this, the present application provides an underground pipeline corridor for nuclear-related projects and a construction method thereof, so as to improve the problems of underground pipeline corridor construction for nuclear-related projects having a great impact on the environment, requiring a large amount of manpower and having high safety risks.

[0005] On the one hand, the present application provides an underground pipeline corridor for nuclear engineering, including a pipeline corridor main body, wherein the pipeline corridor main body includes a pipeline corridor section and a secondary casting section, and there are multiple pipeline corridor sections; wherein the pipeline corridor section includes multiple prefabricated segments, and the multiple prefabricated segments are anchored and connected; wherein there are multiple secondary casting sections, and any two adjacent pipeline corridor sections are cast and connected through one secondary casting section.

[0006] The main body of the tunnel includes a tunnel section and a secondary casting section, and any adjacent tunnel sections are cast and connected through the secondary casting section, wherein the tunnel section is anchored and connected through multiple prefabricated segments. The prefabricated segments can be processed in advance at the prefabrication plant, transported to the construction site, and then anchored and assembled in the trench, thereby avoiding a large number of wet casting operations at the construction site, thereby eliminating the need for a large number of personnel. At the same time, a small amount of casting operations can avoid the release of a large amount of gas from concrete and the impact of operation residues on the environment, and reduce construction risks.

[0007] In an optional embodiment, the secondary casting section is connected to two adjacent pipe gallery sections through pre-embedded force transfer reinforcement; and / or, a steel plate waterstop is provided on the outer surface where the secondary casting section is connected to the pipe gallery section; and / or, the outer surface of the pipe gallery body is covered with two layers of waterproof membrane, which is a self-adhesive polymer modified asphalt waterproof membrane; and / or, a centrally embedded rubber waterstop is pre-embedded in the secondary casting section to form an expansion joint.

[0008] In an optional embodiment, the prefabricated segment is provided with a channel along its length direction, a plurality of anchoring ends are provided at circumferential intervals on the inner wall surface of the channel, and a tensioning grouting device is pre-embedded in the anchoring end.

[0009] In an optional embodiment, the tensioning grouting device includes an anchor plate, a steel pipe and a connecting rod, wherein there are two anchor plates, and the two anchor plates are respectively fixed on the steel pipe near its two ends, and there are multiple connecting rods, and the multiple connecting rods are arranged at intervals along the circumference of the steel pipe, and the two ends of the connecting rod are respectively connected to the two anchor plates.

[0010] In an optional embodiment, the prefabricated segment is anchored by a steel strand, and the steel strands inside the two ends of the steel pipe are provided with water-swellable waterstop strips for closing the two ends of the steel pipe; and / or, a grouting pipe is connected to the steel pipe for grouting into the steel pipe; and / or, a caliper is pre-embedded in the wall of the channel; and / or, the length of the prefabricated segment is 2.5m to 3.5m; and / or, the length of the pipe gallery section is 30m to 40m.

[0011] In an optional embodiment, the two ends of the prefabricated segment are respectively provided with a plug and a socket, and the plug and the socket are both two stepped surfaces, and the two stepped surfaces of the plug are provided with a water-swellable rubber composite sealing ring, and the water-swellable rubber composite sealing ring is provided with a center hole. Correspondingly, the two step surfaces of the socket are provided with a slot, and in the matching plug and the socket, the end of the water-swellable rubber composite sealing ring close to the socket is crimped into the slot.

[0012] In an optional embodiment, the gaps on the inner surface and the outer surface of the mating point between the plug and the socket are filled with polysulfide sealing paste; and / or a waterproof reinforcement layer is provided on the outer surface of the mating point between the plug and the socket; and / or an angle between the connecting surface of the two stepped surfaces of the plug and the length direction of the pipe gallery section is 5° to 10°; an angle between the connecting surface of the two stepped surfaces of the socket and the length direction of the pipe gallery section is 5° to 10°.

[0013] In an optional embodiment, a water injection channel is provided on the prefabricated segment, one end of the water injection channel is provided on the inner wall surface of the channel, and the other end of the water injection channel is located on the surface of the socket and between two circles of the water-swellable rubber composite sealing ring; it also includes a pad layer, and the pad layer is in contact with the outer bottom surface of the pipeline corridor body.

[0014] In an optional embodiment, reinforcing ribs are embedded in the top of the prefabricated segment, and a plurality of the reinforcing ribs are arranged in a criss-cross pattern. A plurality of hanging points are arranged on the top of the prefabricated segment, and the plurality of hanging points are evenly distributed on the top of the prefabricated segment.

[0015] On the other hand, the present application also provides a construction method for an underground pipe gallery of a nuclear-related project in any one of the above-mentioned embodiments, comprising the steps of:

[0016] making the prefabricated segment;

[0017] Digging trenches;

[0018] Hoisting the prefabricated segment into the pipe trench, and forming a plurality of spaced pipe gallery segments in the pipe trench by anchoring;

[0019] Between two adjacent pipe gallery sections, the secondary casting section is formed by casting through a secondary casting method for connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a structural schematic diagram of an underground pipe gallery in a nuclear engineering project with the base plate layer removed according to an embodiment of the present application;

[0022] Figure 2 for Figure 1 Cross-section of the middle AA;

[0023] Figure 3 This is a structural schematic diagram of a socket on a prefabricated segment according to an embodiment of the present application;

[0024] Figure 4 This is a structural schematic diagram of a prefabricated segment upper socket according to an embodiment of the present application;

[0025] Figure 5 This is a structural schematic diagram of the mating position of the spigot and the socket on a prefabricated segment according to an embodiment of the present application;

[0026] Figure 6 A schematic diagram of the cross-sectional structure of a prefabricated segment upper socket according to an embodiment of the present application;

[0027] Figure 7 This is a schematic structural diagram of a water-swellable rubber composite sealing ring according to an embodiment of the present application;

[0028] Figure 8 This is a structural schematic diagram of the mating position of the spigot and the socket on another prefabricated segment according to an embodiment of the present application;

[0029] Fig. 9 This is a schematic diagram of the relevant matching structure of the steel strands in a pipe gallery section in an embodiment of the present application;

[0030] Fig.10 A structural schematic diagram of another perspective of the related coordination of the middle steel stranded rope in an embodiment of the present application;

[0031] Fig.11 A schematic structural diagram of a tension grouting device according to an embodiment of the present application;

[0032] Fig.12 A side view of a tension grouting device according to an embodiment of the present application;

[0033] Fig.13 for Fig.12 Sectional view at the middle BB;

[0034] Fig.14 A top view of a prefabricated segment according to an embodiment of the present application;

[0035] Fig.15 This is a schematic structural diagram of a prefabricated segment top according to an embodiment of the present application;

[0036] Fig.16 This is a schematic diagram of a pipeline corridor section during the anchoring process according to an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 1. Pipe gallery body; 2. Pad layer; 3. Jack;

[0039] 11. Pipe gallery section; 12. Secondary pouring section; 13. Steel plate water stop; 14. Waterproof membrane;

[0040] 111. Prefabricated segment; 112. Water-swellable rubber composite sealing ring; 113. Steel strand; 114. Polysulfide sealing paste; 115. Waterproof reinforcement layer; 116. Water-swellable waterstop strip;

[0041] 1111, channel; 1112, anchor end; 1113, tension grouting device; 1114, caliper; 1115, socket; 1116, socket; 1117, water injection channel; 1118, reinforcement bar; 1119, hanging point;

[0042] 11131. anchor plate; 11132. steel pipe; 11133. connecting rod; 11134. grouting pipe;

[0043] 11161, card slot;

[0044] 1121, middle hole;

[0045] 121. Embedded rubber waterstop; 122. Force transfer reinforcement. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0047] In the relevant technology, underground pipe corridors for nuclear projects, i.e., pipe corridors in nuclear power plants, are the main places for the centralized laying of pipes for large-scale devices. They are mainly used to transmit media such as electricity, heat energy, cooling water, etc., to ensure the safe and stable operation of nuclear power plants. Pipe corridors are composed of columns, beams and trusses of steel or reinforced concrete structures, and various pipes, cables, valves and other equipment are laid inside.

[0048] The design and construction method of underground pipeline corridors in nuclear projects is full cast-in-place design and construction. Due to the solidification of concrete, on-site wet operations require a large number of people to carry out long-term continuous operations. Not only is the workload large, but the gases released during the solidification process of the concrete and the residual operations have a great impact on the environment of the construction site. At the same time, wet operations have high safety risks.

[0049] Therefore, the present application provides an underground pipeline corridor for nuclear-related projects and a construction method thereof, so as to improve the problems that the construction of underground pipeline corridors for nuclear-related projects has a great impact on the environment, requires a lot of manpower and has high safety risks.

[0050] Combine the following Figures 1 to 16 , describing an embodiment of the present application.

[0051] According to an embodiment of the present application, on the one hand, a nuclear engineering underground pipe gallery is provided, such as Figure 1 As shown, it includes a pipe gallery body 1, and the pipe gallery body 1 includes a secondary casting section 12 and a pipe gallery section 11.

[0052] Specifically: there are multiple pipe gallery sections 11, wherein the pipe gallery section 11 includes multiple precast segments 111, the precast segments 111 are concrete prefabricated products, and the multiple precast segments 111 are anchored and connected; there are multiple secondary casting sections 12, and any two adjacent pipe gallery sections 11 are cast and connected through a secondary casting section 12.

[0053] More specifically, the length of the prefabricated segment 111 is preferably 2.5m to 3.5m, and more preferably, the length of the prefabricated segment 111 is 3m; of course, the length of the prefabricated segment 111 can have various specifications, such as any one of 3m, 2m and 1m or a mixture of multiple ones; the length of the corridor section 11 is 30m to 40m, specifically: any one of 30m, 31m, 32m, 33m, 34m, 35m, 36m, 37m, 38m, 39m and 40m; preferably 35m, that is, a secondary casting section 12 is arranged every 35m in the corridor body 1.

[0054] It should be noted that any two adjacent pipe gallery sections 11 are connected by casting through a secondary casting section 12. Specifically, during the casting process, the secondary casting section 12 is directly connected to the pipe gallery sections 11 on both sides thereof without the need to set up connectors for separate connection.

[0055] In this embodiment, the tunnel body 1 includes a tunnel section 11 and a secondary casting section 12, and any adjacent tunnel sections 11 are cast and connected through the secondary casting section 12, wherein the tunnel section 11 is anchored and connected through a plurality of prefabricated segments 111, and the prefabricated segments 111 can be pre-processed in a prefabrication plant, transported to the construction site, and then anchored and assembled in the trench, thereby avoiding a large number of wet casting operations at the construction site, thereby eliminating the need for a large number of personnel, and a small amount of casting operations, thereby avoiding the release of a large amount of gas from concrete and the impact of operation residues on the environment, and reducing construction risks.

[0056] In one embodiment, Figure 1 As shown, the secondary casting section 12 is connected to the two adjacent pipe gallery sections 11 through the pre-buried force transfer reinforcement 122. Specifically, the force transfer reinforcement 122 is a steel bar, preferably a first-grade steel bar with a diameter of 12mm to 16mm; and the force transfer reinforcement 122 is greased before installation to prevent rust; in this embodiment, the setting of the force transfer reinforcement 122 can enable force to be transmitted between adjacent pipe gallery sections 11.

[0057] and / or, if Figure 1 As shown, the outer surface where the secondary casting section 12 is connected to the pipe gallery section 11 is provided with a steel plate water stop strip 13 for waterproofing to improve the waterproofness of the pipe gallery body 1.

[0058] and / or, if Figure 8As shown, the outer surface of the tunnel body 1 is covered with two layers of waterproof membrane 14 by bonding or other means, and the waterproof membrane 14 is a self-adhesive polymer modified asphalt waterproof membrane. Preferably, the self-adhesive polymer modified asphalt waterproof membrane is a polyethylene film (PE) surface type II type N self-adhesive polymer modified asphalt waterproof membrane 14, and the thickness of the two layers is not less than 1.5 mm; in this embodiment, by arranging two layers of waterproof membrane 14 on the outside of the tunnel body 1, the overall waterproof performance of the tunnel body 1 can be improved.

[0059] and / or, if Figure 1 As shown, a buried rubber waterstop 121 is pre-buried in the secondary casting section 12 to form an expansion joint. Specifically, the model and size of the buried rubber waterstop 121 can be selected and set according to the size and performance requirements of the corridor body 1. In this embodiment, by setting the expansion joint, the deformation resistance of the corridor body 1 caused by thermal expansion and contraction can be improved.

[0060] In one embodiment, Figure 2 As shown, the prefabricated segment 111 is provided with a channel 1111 along its length direction, and a plurality of anchoring ends 1112 are provided at intervals in the circumferential direction on the inner wall surface of the channel 1111 , and a tensioning grouting device 1113 is pre-buried in the anchoring end 1112 .

[0061] Specifically, the number of channels 1111 can be one or more. Generally, when there is one channel 1111, it is a single-compartment underground pipeline corridor, and when there are two channels 1111, it is a double-compartment underground pipeline corridor. Generally, the shape of the channel 1111 is a rectangle, and the anchoring end 1112 is usually arranged at the inner corner of the channel 1111. The anchoring end 1112 is a concrete structure and is in the form of an isosceles right triangle. Specifically, the anchoring end 1112 is arranged in multiple sections at intervals in the prefabricated segment 111.

[0062] In this embodiment, multiple anchoring ends 1112 are arranged circumferentially within the inner wall of the channel 1111 to anchor multiple prefabricated segments 111, and a tensioning grouting device 1113 is pre-embedded in the anchoring ends 1112, so that the overall stability of the corridor section 11 can be improved.

[0063] In one embodiment, Figures 11 to 13As shown, the tension grouting device 1113 includes an anchor plate 11131, a steel pipe 11132 and a connecting rod 11133. The anchor plate 11131 is a metal plate made of Q235B, and its shape can be a proportional reduction of the cross section of the anchor end 1112. There are two anchor plates 11131, and the two anchor plates 11131 are respectively fixedly arranged on the parts of the steel pipe 11132 near its two ends by welding. The anchor plate 11131 and the steel pipe 11132 are connected to each other. The relative relationship can be adjusted according to actual needs; the material of the steel pipe 11132 is Q235B, and its aperture is not less than 45mm; the connecting rod 11133 is specifically a metal rod, specifically a steel bar, and a plurality of connecting rods 11133 are provided, and the plurality of connecting rods 11133 are arranged at intervals along the circumference of the steel pipe 11132, and the two ends of the connecting rod 11133 are respectively connected to the two anchor plates 11131 by welding or bolting.

[0064] In this embodiment, the tensioning grouting device 1113 includes an anchor plate 11131, a steel pipe 11132 and a connecting rod 11133. An anchor plate 11131 is respectively provided at both ends of the steel pipe 11132, and a plurality of connecting rods 11133 arranged at intervals along the circumference of the steel pipe 11132 are connected between the two anchor plates 11131, thereby not only enhancing the connection strength between the steel pipe 11132 and the anchoring end 1112, but also enhancing the self-strength of the anchoring end 1112 and improving its anti-deformation ability.

[0065] In one embodiment, Fig. 9 and Fig.10 As shown, the prefabricated segment 111 is anchored by a steel strand 113, and water-swellable waterstop strips 116 are wound around the steel strand 113 at both ends of the steel pipe 11132 to seal the two ends of the steel pipe 11132 to prevent leakage and prevent water vapor from entering the steel pipe 11132, thereby improving the corrosion resistance of the steel pipe 11132.

[0066] and / or, if Fig.11 As shown, the steel pipe 11132 is connected with a grouting pipe 11134 for grouting into the steel pipe 11132. Specifically, the grouting pipe 11134 is made of Q235B, and its position and size can be set according to actual construction requirements.

[0067] and / or, if Figure 2 As shown, a caliper 1114 is pre-embedded in the wall of the channel 1111 , which can enhance the anti-deformation capability of the prefabricated segment 111 .

[0068] In one embodiment, Figures 3 to 7As shown, the two ends of the prefabricated segment 111 are respectively provided with a socket 1115 and a socket 1116, and the socket 1115 and the socket 1116 are both two stepped surfaces, and the two stepped surfaces of the socket 1115 are provided with a water-swellable rubber composite sealing ring 112, as shown in FIG. Figure 7 As shown, a center hole 1121 is provided in the water-swellable rubber composite sealing ring 112, and correspondingly, a card groove 11161 is provided on the two step surfaces of the socket 1116, and in the matching connected socket 1115 and the socket 1116, the end of the water-swellable rubber composite sealing ring 112 close to the socket 1116 is crimped in the card groove 11161.

[0069] Specifically, Figure 3 and Figure 4 As shown, the number of water-swellable rubber composite sealing rings 112 provided on the two step surfaces of the plug 1115 can be one or more, and when there are multiple, they are arranged concentrically; of course, correspondingly, the number of slots 11161 required to be provided on the two step surfaces of the socket 1116 can be one or more, and when there are multiple, they are arranged concentrically.

[0070] More specifically, the water-swellable rubber composite sealing ring 112 can be arranged at a position slightly inner to the stepped surface; the shape of the slot 11161 matches the profile of the water-swellable rubber composite sealing ring 112; the size of the water-swellable rubber composite sealing ring 112 can be designed based on a cross-sectional pressure of not less than 1.5 MPa, and the diameter of the middle hole 1121 is 6 mm to 10 mm, which is used to compensate for the deformation of the length direction of the pipe gallery body 1 and ensure the tightness of the water-swellable rubber composite sealing ring 112.

[0071] In this embodiment, two adjacent prefabricated segments 111 are connected by means of a socket 1115 and a socket 1116, and at least two circles of water-swellable rubber composite sealing rings 112 are arranged between the two, thereby forming a bending sealing structure, and in the anchored connection mode, the gap between the socket 1115 and the socket 1116 can be adjusted, thereby ensuring and improving the waterproofness of the corridor body.

[0072] In one embodiment, Figure 5 As shown, the gaps on the inner surface and the outer surface of the mating place between the plug 1115 and the socket 1116 are filled with polysulfide sealing paste 114, which can further improve the waterproof effect of the pipe gallery body 1.

[0073] and / or, if Figure 8 As shown, a waterproof reinforcement layer 115 is provided on the outer surface of the joint between the plug 1115 and the socket 1116. Specifically, the waterproof reinforcement layer 115 is a rubber waterstop, and the overlap amount between the waterproof reinforcement layer 115 and the prefabricated segments 111 on both sides is not less than 300 mm, so as to further improve the waterproof effect of the pipeline corridor body 1.

[0074] and / or, if Figure 5 As shown, the angle between the connecting surface of the two step surfaces of the plug 1115 and the length direction of the pipe gallery section 11 is 5° to 10°; the angle between the connecting surface of the two step surfaces of the socket 1116 and the length direction of the pipe gallery section 11 is 5° to 10°, which can facilitate installation, and the space formed between the plug 1115 and the socket 1116 can be used for water injection test.

[0075] In one embodiment, Figure 5 As shown, a water injection channel 1117 is provided on the prefabricated segment 111, one end of the water injection channel 1117 is provided on the inner wall surface of the channel 1111, and the other end of the water injection channel 1117 is located on the surface of the socket 1115 and between two circles of water-swellable rubber composite sealing rings 112, which is used for conducting water injection tests to detect the waterproof effect of the pipe body.

[0076] The underground pipeline corridor of the nuclear project also includes a pad layer 2, which is in contact with the outer bottom surface of the pipeline corridor body 1. Specifically, the pad layer 2 is generally C20 plain concrete, and its thickness is preferably 100mm to 200mm, generally 100mm. For areas with poor geological conditions, the thickness of the pad layer 2 can be thickened, preferably 200mm.

[0077] By providing the pad layer 2, the supporting stability of the pipeline corridor body 1 can be improved, the service life thereof can be increased, local lower limits can be prevented, and the maintenance cost can be reduced.

[0078] In one embodiment, Fig.14 and Fig.15 As shown, reinforcing ribs 1118 are embedded in the top of the prefabricated segment 111 , and the plurality of reinforcing ribs 1118 are arranged in a criss-cross pattern. The top of the prefabricated segment 111 is provided with a plurality of hanging points 1119 , and the plurality of hanging points 1119 are evenly distributed on the top of the prefabricated segment 111 .

[0079] Specifically, the reinforcing ribs 1118 are steel bars with a specification of grade 3 steel and a diameter of 12 mm. The transverse and longitudinal steel bars are connected by binding and embedded in the prefabricated segment 111. Of course, the reinforcing ribs 1118 can be connected to the hanging points 1119, such as by welding; the distance between the hanging points 1119 and the top edge of the prefabricated segment 111 is 500 mm to 1200 mm, and this result is obtained through analysis using the simulation program ANSYS.

[0080] In this embodiment, crisscross reinforcing ribs 1118 are provided on the top of the prefabricated segment 111 to enhance the deformation resistance of the prefabricated segment 111, thereby preventing deformation and damage during the hoisting process, which would affect its performance.

[0081] According to an embodiment of the present application, in a second aspect, a construction method for an underground pipe gallery of a nuclear-related project in the first aspect is provided, comprising the steps of:

[0082] Fabricating prefabricated segments 111 in a prefabrication plant;

[0083] Digging trenches;

[0084] The prefabricated segments 111 are hoisted into the pipe trench and a plurality of spaced pipe gallery segments 11 are formed in the pipe trench by anchoring;

[0085] Between two adjacent pipe gallery sections 11, a secondary casting section 12 is formed by casting through a secondary casting method for connection.

[0086] The above method is the construction method of the underground pipeline corridor of the nuclear-related project in the first aspect, and the effect is the same as that of the underground pipeline corridor of the nuclear-related project, so it will not be repeated here.

[0087] According to an embodiment of the present application, in a third aspect, there is provided an underground pipe gallery of a nuclear engineering project in the first aspect, such as Figure 1 As shown, it includes a pipe gallery body 1 and a pad layer 2, and the pad layer 2 is in contact with the outer bottom surface of the pipe gallery body 1; specifically, the pad layer 2 is generally C20 plain concrete, and its thickness is preferably 100mm to 200mm, generally 100mm. For areas with poor geological conditions, the thickness of the pad layer 2 can be thickened, preferably 200mm.

[0088] Specifically, the tunnel body 1 includes a secondary casting section 12 and a tunnel section 11; there are multiple tunnel sections 11, wherein the tunnel section 11 includes multiple precast segments 111, the precast segments 111 are concrete prefabricated products, and the multiple precast segments 111 are anchored and connected; there are multiple secondary casting sections 12, and any two adjacent tunnel sections 11 are cast and connected through a secondary casting section 12.

[0089] More specifically, the length of the prefabricated segment 111 is preferably 2.5m to 3.5m, and more preferably, the length of the prefabricated segment 111 is 3m; of course, the length of the prefabricated segment 111 can have various specifications, such as any one of 3m, 2m and 1m or a mixture of multiple ones; the length of the corridor section 11 is 30m to 40m, specifically: any one of 30m, 31m, 32m, 33m, 34m, 35m, 36m, 37m, 38m, 39m and 40m; preferably 35m, that is, a secondary casting section 12 is arranged every 35m in the corridor body 1.

[0090] like Figure 1As shown, the secondary casting section 12 is connected to the two adjacent pipe gallery sections 11 through the pre-buried force transfer reinforcement 122. Specifically, the force transfer reinforcement 122 is a steel bar, preferably a first-grade steel bar with a diameter of 12mm to 16mm; and the force transfer reinforcement 122 is greased before installation to prevent rust; in this embodiment, the setting of the force transfer reinforcement 122 can enable force to be transmitted between adjacent pipe gallery sections 11.

[0091] like Figure 1 As shown, the outer surface where the secondary casting section 12 is connected to the pipe gallery section 11 is provided with a steel plate water stop strip 13 for waterproofing to improve the waterproofness of the pipe gallery body 1.

[0092] like Figure 8 As shown, the outer surface of the tunnel body 1 is covered with two layers of waterproof membrane 14 by bonding or other means, and the waterproof membrane 14 is a self-adhesive polymer modified asphalt waterproof membrane 14. Preferably, the self-adhesive polymer modified asphalt waterproof membrane 14 is a polyethylene film (PE) surface type II type N self-adhesive polymer modified asphalt waterproof membrane 14, and the thickness of the two layers is not less than 1.5 mm; in this embodiment, by arranging two layers of waterproof membrane 14 on the outside of the tunnel body 1, the overall waterproof performance of the tunnel body 1 can be improved.

[0093] like Figure 1 As shown, a buried rubber waterstop 121 is pre-buried in the secondary casting section 12 to form an expansion joint. Specifically, the model and size of the buried rubber waterstop 121 can be selected and set according to the size and performance requirements of the corridor body 1. In this embodiment, by setting the expansion joint, the deformation resistance of the corridor body 1 caused by thermal expansion and contraction can be improved.

[0094] like Figure 2 As shown, the prefabricated segment 111 is provided with a channel 1111 along its length direction, and a plurality of anchoring ends 1112 are provided at intervals in the circumferential direction of the inner wall surface of the channel 1111, and a tension grouting device 1113 is pre-buried in the anchoring end 1112. Specifically, the number of channels 1111 can be one or more. Generally, when there is one channel 1111, it is a single-cabin underground pipe gallery, and when there are two channels 1111, it is a double-cabin underground pipe gallery; generally, the shape of the channel 1111 is rectangular, and the anchoring end 1112 is usually arranged at the inner corner of the channel 1111. The anchoring end 1112 is a concrete structure and is in the form of an isosceles right triangle. Specifically, the anchoring end 1112 is arranged in the prefabricated segment 111 at intervals of multiple sections.

[0095] like Figures 11 to 13As shown, the tension grouting device 1113 includes an anchor plate 11131, a steel pipe 11132 and a connecting rod 11133. The anchor plate 11131 is a metal plate made of Q235B, and its shape can be a proportional reduction of the cross section of the anchor end 1112. There are two anchor plates 11131, and the two anchor plates 11131 are respectively fixedly arranged on the parts of the steel pipe 11132 near its two ends by welding. The anchor plate 11131 and the steel pipe 11132 are connected to each other. The relative relationship can be adjusted according to actual needs; the material of the steel pipe 11132 is Q235B, and its aperture is not less than 45mm; the connecting rod 11133 is specifically a metal rod, specifically a steel bar, and a plurality of connecting rods 11133 are provided, and the plurality of connecting rods 11133 are arranged at intervals along the circumference of the steel pipe 11132, and the two ends of the connecting rod 11133 are respectively connected to the two anchor plates 11131 by welding or bolting.

[0096] like Fig. 9 and Fig.10 As shown, the prefabricated segment 111 is anchored by a steel strand 113, and water-swellable waterstop strips 116 are wound around the steel strand 113 at both ends of the steel pipe 11132 to seal the two ends of the steel pipe 11132 to prevent leakage and prevent water vapor from entering the steel pipe 11132, thereby improving the corrosion resistance of the steel pipe 11132.

[0097] like Fig.11 As shown, the steel pipe 11132 is connected with a grouting pipe 11134 for grouting into the steel pipe 11132. Specifically, the grouting pipe 11134 is made of Q235B, and its position and size can be set according to actual construction requirements.

[0098] like Figure 2 As shown, a caliper 1114 is pre-embedded in the wall of the channel 1111 , which can enhance the anti-deformation capability of the prefabricated segment 111 .

[0099] like Figures 3 to 7 As shown, the two ends of the prefabricated segment 111 are respectively provided with a socket 1115 and a socket 1116, and the socket 1115 and the socket 1116 are both two-step surfaces. The two step surfaces of the socket 1115 are provided with a water-swellable rubber composite sealing ring 112, and the water-swellable rubber composite sealing ring 112 is provided with a center hole 1121. Correspondingly, the two step surfaces of the socket 1116 are provided with a groove 11161. In the matching socket 1115 and the socket 1116, the end of the water-swellable rubber composite sealing ring 112 close to the socket 1116 is crimped in the groove 11161.

[0100] Specifically, Figure 3 and Figure 4As shown, the number of water-swellable rubber composite sealing rings 112 provided on the two step surfaces of the plug 1115 can be one or more, and when there are multiple, they are arranged concentrically; of course, correspondingly, the number of slots 11161 required to be provided on the two step surfaces of the socket 1116 can be one or more, and when there are multiple, they are arranged concentrically.

[0101] More specifically, the water-swellable rubber composite sealing ring 112 can be arranged at a position slightly inner to the stepped surface; the shape of the slot 11161 matches the profile of the water-swellable rubber composite sealing ring 112; the size of the water-swellable rubber composite sealing ring 112 can be designed based on a cross-sectional pressure of not less than 1.5 MPa, and the diameter of the middle hole 1121 is 6 mm to 10 mm, which is used to compensate for the deformation of the length direction of the pipe gallery body 1 and ensure the tightness of the water-swellable rubber composite sealing ring 112.

[0102] like Figure 5 As shown, the gaps on the inner surface and the outer surface of the mating place between the plug 1115 and the socket 1116 are filled with polysulfide sealing paste 114, which can further improve the waterproof effect of the pipe gallery body 1.

[0103] like Figure 8 As shown, a waterproof reinforcement layer 115 is provided on the outer surface of the joint between the plug 1115 and the socket 1116. Specifically, the waterproof reinforcement layer 115 is a rubber waterstop, and the overlap amount between the waterproof reinforcement layer 115 and the prefabricated segments 111 on both sides is not less than 300 mm, so as to further improve the waterproof effect of the pipeline corridor body 1.

[0104] like Figure 5 As shown, the angle between the connecting surface of the two step surfaces of the plug 1115 and the length direction of the pipe gallery section 11 is 5° to 10°; the angle between the connecting surface of the two step surfaces of the socket 1116 and the length direction of the pipe gallery section 11 is 5° to 10°, which can facilitate installation, and the space formed between the plug 1115 and the socket 1116 can be used for water injection test.

[0105] like Figure 5 As shown, a water injection channel 1117 is provided on the prefabricated segment 111, one end of the water injection channel 1117 is provided on the inner wall surface of the channel 1111, and the other end of the water injection channel 1117 is located on the surface of the socket 1115 and between two circles of water-swellable rubber composite sealing rings 112, which is used for conducting water injection tests to detect the waterproof effect of the pipe body.

[0106] like Fig.14 and Fig.15As shown, reinforcing ribs 1118 are embedded in the top of the prefabricated segment 111 , and the plurality of reinforcing ribs 1118 are arranged in a criss-cross pattern. The top of the prefabricated segment 111 is provided with a plurality of hanging points 1119 , and the plurality of hanging points 1119 are evenly distributed on the top of the prefabricated segment 111 .

[0107] Specifically, the reinforcing ribs 1118 are steel bars with a specification of grade 3 steel and a diameter of 12 mm. The transverse and longitudinal steel bars are connected by binding and embedded in the prefabricated segment 111. Of course, the reinforcing ribs 1118 can be connected to the hanging points 1119, such as by welding; the distance between the hanging points 1119 and the top edge of the prefabricated segment 111 is 500 mm to 1200 mm, and this result is obtained through analysis using the simulation program ANSYS.

[0108] According to an embodiment of the present application, in a fourth aspect, a construction method for an underground pipe gallery of a nuclear-related project in the third aspect is provided, comprising the steps of:

[0109] The prefabricated segment 111 is manufactured in a prefabrication plant. The size of the prefabricated segment 111 is set according to the demand. The prefabricated segment 111 is pre-embedded with pre-tensioning grouting devices 1113, calipers 1114, steel bars and other pre-embedded parts. The top of the prefabricated segment is pre-embedded with criss-cross reinforcing ribs 1118 and hanging points 1119.

[0110] Dig the trench, the depth of which can be set according to the needs.

[0111] The prefabricated segments 111 are hoisted into the trench and anchored to form multiple spaced pipe gallery segments 11 in the trench; before anchoring, water-swellable waterstop strips 116 are first wound around the steel strands 113; Fig.16 As shown, during anchoring, jacks 3 are used for tensioning, and the total tonnage of each jack 3 is controlled within 25T; after the gap between the socket 1115 and the socket 1116 reaches the design value C (generally 10mm), the tensioning is completed and the anchor is sealed; after anchoring, the gaps in the outer and inner surfaces of the socket 1115 and the socket 1116 are filled with polysulfide sealing paste 114; and then the waterproof reinforcement layer 115, specifically, a rubber waterstop, is bonded to the outer surfaces of the socket 1115 and the socket 1116.

[0112] Between two adjacent pipe gallery sections 11, a secondary casting section 12 is formed by casting through secondary casting for connection. Specifically, holes are drilled on the cross-sections of the two adjacent pipe gallery sections 11, and the two ends of the force transfer reinforcement 122 are respectively inserted into the two adjacent pipe gallery sections 11, and the embedded rubber waterstop 121 is fixed at the corresponding position. Then, the two sides of the embedded rubber waterstop 121 are cast separately to form an expansion joint, and the two adjacent pipe gallery sections 11 are connected.

[0113] A steel plate water stop strip 13 is bonded to the outer surface of the connection between the pipe gallery section 11 and the secondary casting section 12; and two layers of waterproof membrane 14 are bonded to the outer surface of the pipe gallery body.

[0114] A water injection test is carried out through the water injection channel 1117. The test water head is the bottom elevation of the corridor floor plus a 2m head height, and should not be less than 0.1MPa. After pressurizing to the design pressure, the pressure is maintained constant for 5 minutes. During the constant pressure process, there should be no water seepage or water flowing along the wall inside or outside the joints.

[0115] After the water injection test is completed, grouting is injected into the steel pipe 11132 through the grouting pipe 11134, and then soil is filled into the trench.

[0116] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An underground pipe gallery for nuclear engineering, characterized in that: include: A pipe gallery body (1), the pipe gallery body (1) comprising: A pipe gallery section (11), wherein a plurality of pipe gallery sections (11) are provided; wherein the pipe gallery section (11) comprises a plurality of prefabricated segments (111), and the plurality of prefabricated segments (111) are anchored and connected; and A plurality of secondary casting sections (12) are provided, and any two adjacent pipe gallery sections (11) are connected by casting through one secondary casting section (12).

2. The underground pipe gallery for nuclear engineering according to claim 1 is characterized in that: The secondary casting section (12) is connected to two adjacent pipe gallery sections (11) via pre-buried force transfer bars (122); And / or, a steel plate water stop strip (13) is provided on the outer surface where the secondary pouring section (12) is connected to the pipe gallery section (11); And / or, the outer surface of the pipe gallery body (1) is covered with two layers of waterproof rolls (14), and the waterproof rolls (14) are self-adhesive polymer modified asphalt waterproof rolls; And / or, a centrally embedded rubber water stop strip (121) is pre-buried in the secondary pouring section (12) to form an expansion joint.

3. The underground pipe gallery for nuclear engineering according to claim 1 is characterized in that: The prefabricated segment (111) is provided with a channel (1111) along its length direction, and a plurality of anchoring ends (1112) are provided at circumferential intervals on the inner wall surface of the channel (1111), and a tension grouting device (1113) is pre-buried in the anchoring end (1112).

4. The underground pipe gallery for nuclear engineering according to claim 3 is characterized in that: The tension grouting device (1113) comprises an anchor plate (11131), a steel pipe (11132) and a connecting rod (11133). There are two anchor plates (11131), and the two anchor plates (11131) are respectively fixedly arranged on the steel pipe (11132) near its two ends. There are multiple connecting rods (11133), and the multiple connecting rods (11133) are arranged at intervals along the circumference of the steel pipe (11132), and the two ends of the connecting rod (11133) are respectively connected to the two anchor plates (11131).

5. The underground pipe gallery for nuclear engineering according to claim 4 is characterized in that: The prefabricated segment (111) is anchored by a steel strand (113), and water-swellable waterstop strips (116) are provided on the steel strand (113) at both ends of the steel pipe (11132) to seal both ends of the steel pipe (11132); And / or, a grouting pipe (11134) is connected to the steel pipe (11132) and is used for injecting grout into the steel pipe (11132); And / or, a caliper (1114) is pre-embedded in the wall surface of the channel (1111); and / or, the length of the prefabricated segment (111) is 2.5m to 3.5m; And / or, the length of the pipe gallery section (11) is 30m to 40m.

6. The underground pipe gallery for nuclear engineering according to any one of claims 1 to 5, characterized in that: The two ends of the prefabricated segment (111) are respectively provided with a socket (1115) and a socket (1116); the socket (1115) and the socket (1116) are both two stepped surfaces; a water-swellable rubber composite sealing ring (112) is provided on the two stepped surfaces of the socket (1115); a center hole (1121) is provided in the water-swellable rubber composite sealing ring (112); correspondingly, a clamping groove (11161) is provided on the two stepped surfaces of the socket (1116); in the matching socket (1115) and the socket (1116), the end of the water-swellable rubber composite sealing ring (112) close to the socket (1116) is pressed into the clamping groove (11161).

7. The underground pipe gallery for nuclear engineering according to claim 6 is characterized in that: The gaps on the inner surface and the outer surface of the mating portion between the plug (1115) and the socket (1116) are filled with polysulfide sealing paste (114); And / or, a waterproof reinforcement layer (115) is provided on the outer surface of the mating point between the plug (1115) and the socket (1116); And / or, the angle between the connecting surface of the two step surfaces of the socket (1115) and the length direction of the pipe gallery section (11) is 5° to 10°; the angle between the connecting surface of the two step surfaces of the socket (1116) and the length direction of the pipe gallery section (11) is 5° to 10°.

8. The underground pipe gallery for nuclear engineering according to claim 6 is characterized in that: The prefabricated segment (111) is provided with a water injection channel (1117), one end of the water injection channel (1117) is arranged on the inner wall surface of the channel (1111), and the other end of the water injection channel (1117) is located on the surface of the socket (1115) and between two circles of the water-swellable rubber composite sealing ring (112); It also comprises a pad layer (2), wherein the pad layer (2) is in contact with the outer bottom surface of the pipe gallery body (1).

9. The underground pipe gallery of a nuclear engineering project according to any one of claims 1 to 5, characterized in that: A reinforcing rib (1118) is pre-buried in the top of the prefabricated segment (111), and a plurality of the reinforcing ribs (1118) are arranged in a crisscross pattern. A plurality of hanging points (1119) are arranged on the top of the prefabricated segment (111), and the plurality of hanging points (1119) are evenly distributed on the top of the prefabricated segment (111).

10. A construction method for an underground pipe gallery of a nuclear engineering project as claimed in any one of claims 1 to 9, characterized in that: Includes steps: Making the prefabricated segment (111); Digging trenches; The prefabricated segment (111) is hoisted into the pipe trench, and a plurality of spaced pipe gallery segments (11) are formed in the pipe trench by anchoring; Between two adjacent pipe gallery sections (11), the secondary casting section (12) is cast by secondary casting to connect them.

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