A high-strength track segment and its manufacturing equipment

Abstract

The present invention discloses a high-strength track segment and its manufacturing equipment, including a steel inner frame and a concrete body, wherein the concrete body is wrapped around the steel inner frame, and the concrete body is a concrete slab in a ring shape without an arc. A pair of connecting components are provided on both sides of the concrete body; the steel inner frame includes a first steel frame and a second steel frame. The present invention relates to the field of tunnel segment technology. During the production process of the track segment, a supporting bottom mold is used as the interval for welding operation, and external anchor rods are used in combination with pulling components to achieve prestressed pulling of the steel inner frame of the track segment, and prestress is applied to the stress-bearing part of the inner arc of the segment, so that the segment can effectively resist the concentrated external force at the inner arc during application, thereby improving the structural strength and tensile properties of the segment.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel segments, and in particular to a high-strength track segment and a manufacturing device thereof. Background Art

[0002] With the development of urban planning and the popularization and increase of vehicles, the pressure on ground transportation has increased accordingly. Underground transportation has improved the economy and environmental protection of urban and rural travel and has begun to be more and more popular among people. Therefore, more and more cities pay more attention to the application of underground transportation in traffic planning.

[0003] In the current underground transportation system, track segments are an important component of underground tunnels. The track segments form the supporting structure of underground tunnels, and combined with construction methods such as casting, the tracks have good support. However, the current segments are prone to tension deformation when exposed to earthquakes or huge external forces, resulting in poor seismic toughness of the shield tunnel structure.

[0004] The current production process for tunnel segments mainly involves the following steps: steel bar welding, concrete pouring, forming and curing, demoulding, and repairing. During the production process, concrete is poured directly onto the steel frame to form a composite segment structure. However, the current segment structure is often an arc-less ring structure. After the segment is installed, its inner arc side is subjected to pressure, making it particularly prone to cracks due to vibration. This is because no prestress is applied to the segment during pouring, resulting in poor seismic resistance and tension properties of the concrete structure.

[0005] In response to the above problems, at present, there is an application of increasing prestressing to improve the structural strength of the pipe segment. However, this method is mostly used at the connection position of the pipe segment, and is mostly used for long straight steel bars. There is no better protection for the inner arc side of the pipe segment that is subjected to higher tension. As a result, during the application of the pipe segment, the concrete on the inner arc side of the pipe segment has poor tensile strength and is prone to cracks. Moreover, the current construction equipment is mainly based on direct casting design, which cannot effectively provide auxiliary functions for prestressing manufacturing, resulting in low construction efficiency and many inconveniences in operation. In view of this, in-depth research on the above problems has led to the emergence of this case. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a high-strength track segment and its manufacturing equipment, which solves the existing background technology problems.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-strength track segment, comprising a steel inner frame and a concrete body, wherein the concrete body is wrapped around the steel inner frame, the concrete body is a concrete slab in the shape of a missing arc ring, and a pair of connecting components are provided on both sides of the concrete body;

[0008] The steel inner frame includes a first steel frame and a second steel frame, both of which are steel plates with fan-shaped structures. The first steel frame and the second steel frame are bent. Specifically, the first steel frame and the second steel frame are coaxially arranged in parallel, and a plurality of support rods arranged in a matrix are welded between the first steel frame and the second steel frame.

[0009] The arc diameter of the second steel frame is smaller than the arc diameter of the first steel frame, and the second steel frame and the first steel frame are respectively provided with a plurality of pairs of through slots;

[0010] The second steel frame is provided with a prestressed steel bar assembly connected to the first steel frame, and a plurality of pairs of prestressed anchor holes are provided on both sides of the first steel frame and the second steel frame in a circumferential direction, and the number of the prestressed steel bar assemblies is not less than 2;

[0011] The prestressed steel bar assembly includes a central tube, a central tube is welded to the center line of the second steel frame, the central axis of the central tube coincides with the radial direction of the second steel frame and the central tube is welded to the first steel frame, a pair of pulling tubes are staggered on both sides of the central tube, and the ends of the pair of pulling tubes are respectively welded to the first steel frame and the second steel frame, and the central tube and the pair of pulling tubes apply prestress to the circumferential direction of the second steel frame;

[0012] A pair of the pulling tubes and the central tube are arranged in the circumferential direction of the first steel frame and the second steel frame;

[0013] Two pairs of positioning plug-in components are provided at the four corners of the first steel frame and the second steel frame, and the first steel frame and the second steel frame are positioned corresponding to each other through the two pairs of positioning plug-in components.

[0014] The compressive strength of the concrete used in the concrete body is at least 30 MPa, the waterproof grade of the concrete body is not less than the anti-seepage grade of P10, and the tensile strength of the concrete body after molding is above 5 MPa.

[0015] The connection assembly includes a dovetail guide groove. A dovetail guide groove is provided on one side of the concrete body, and the dovetail guide groove runs through both ends of the concrete body. A dovetail guide block is provided on the other side of the concrete body, and the dovetail guide block matches the width of the dovetail guide groove. At least two pairs of embedded connecting rods are provided between the dovetail guide block and the dovetail guide groove.

[0016] The positioning plug-in assembly includes a positioning plug rod, the first steel frame is provided with a positioning plug rod, and the second steel frame is provided with a positioning plug tube corresponding to the positioning plug rod, and the positioning plug rod and the positioning plug tube are transitionally matched.

[0017] A high-strength rail segment manufacturing device includes a processing frame, the processing frame is a rectangular frame, the processing frame is provided with a casting support trough, the casting support trough is equipped with a support bottom mold, the support bottom mold has a cavity matching the concrete body, the casting support trough is hinged with a closed top cover, the closed top cover is provided with a casting port, and the support bottom mold is provided with pulling corresponding holes corresponding to prestressed anchor holes;

[0018] A pouring frame is provided on the upper part of the processing frame, and a pouring bucket is installed on the pouring frame, and the bottom opening of the pouring bucket corresponds to the pouring port;

[0019] The processing frame is provided with a roving vibrating structure, which performs mechanical vibration on the casting support trough;

[0020] The central tube and the pair of pulling tubes are both internally threaded tubes, a first prestressed counter-pull rod is connected and installed in the central tube, a pair of second prestressed counter-pull rods are threadedly connected to the pair of pulling tubes, the first prestressed counter-pull rod and the pair of second prestressed counter-pull rods are respectively connected to three adjusting sleeves, the middle sections of the first prestressed counter-pull rod and the pair of second prestressed counter-pull rods are both provided with adjusting knobs, the first prestressed counter-pull rod and the pair of second prestressed counter-pull rods are connected to three adjusting assemblies, and the three adjusting assemblies correspond to the three adjusting sleeves;

[0021] The casting frame is provided with a fixed plate, and the fixed plate is provided with a prestressed pulling structure connected with three adjusting sleeves;

[0022] The prestressed pulling structure includes an adjustment hole, an adjustment hole is provided on the fixed plate, an adjustment pulling screw is mounted on the adjustment hole, the bottom end of the adjustment pulling screw is connected to a pulling plate, the pulling plate is connected to the three adjustment sleeves respectively by at least two screws, a pair of guide rods are provided on both sides of the adjustment hole, a pair of guide rings are provided on the pulling plate, and the pair of guide rings are sleeved on the pair of guide rods;

[0023] The adjustment component includes a thread groove, the first prestressed reverse pull rod is provided with a thread groove, a reverse thrust screw is threadedly connected to the thread groove, and the reverse thrust screw is in corresponding contact with the adjustment sleeve through a limiting ring washer.

[0024] A pair of guide rails are provided at the bottom of the processing frame, and a pair of guide blocks are provided at the bottom of the casting support groove. The pair of guide blocks are assembled on the pair of guide rails. A pair of linear screw modules are provided on the pair of guide rails, and the pair of linear screw modules are threadedly engaged with the pair of guide blocks.

[0025] The casting support groove is provided with mounting holes corresponding to the pulling holes, and fixed anchor rods are installed on the mounting holes. The fixed anchor rods pass through the pulling holes corresponding to the prestressed anchor holes and are threadedly connected.

[0026] The first prestressed counter-tension rod and the second prestressed counter-tension rod are both columnar rods, the adjustment knob is a plate with a polygonal structure, and the adjustment knob is integrated with the first prestressed counter-tension rod and the second prestressed counter-tension rod.

[0027] The closed top cover is provided with through holes corresponding to the first prestressed counter-tension rod and the second prestressed counter-tension rod. A closed ring is provided inside the through holes. The closed ring contacts the top openings of the central tube and a pair of pulling tubes.

[0028] The roving vibration structure includes a roving track, which is mounted on the inner side of a casting frame. A roving assembly is mounted on the roving track, and a vibrator is mounted on the roving assembly. The vibrator vibrates the side wall of the corresponding casting support trough.

[0029] The patrol assembly includes a patrol linear motor, a control slider is installed on the patrol track, a pair of position switches are set at both ends of the patrol track, the control slider is connected to the vibrator, and the sliding end of the patrol linear motor is connected to the control slider.

[0030] Beneficial effects:

[0031] The present invention provides a high-strength rail segment and its manufacturing equipment. It has the following beneficial effects: During the rail segment production process, by using a supporting bottom mold as the welding operation interval, and utilizing external anchor rods in conjunction with a pulling assembly, prestressing is achieved on the steel inner frame of the rail segment. Prestress is applied to the stress-bearing portion of the inner arc of the segment, enabling the segment to effectively resist concentrated external forces at the inner arc during use, thereby improving the structural strength and tensile properties of the segment. It also has the following specific advantages:

[0032] 1. First, the track segment processing equipment is designed based on the frame of the track structure and the inner mold for segment forming. The improvements to the two are based on the two devices themselves. The track segment processing equipment is equipped with a prestressed tensioning structure that cooperates with the prestressed steel bar assembly. The prestressed tensioning structure cooperates with the adjustment component to pre-tension the prestressed steel bar assembly. Therefore, the improvement is minimal, easy to implement, and has good economic efficiency.

[0033] 2. A prestressed steel bar assembly consisting of a central tube and a pair of tensioning tubes is installed inside the track segment. The prestressed steel bar assembly is welded, which is convenient and simple to operate. The central tube and a pair of tensioning tubes form the prestressed anchor points of the steel bar internal frame, which has little impact on the main structure of the segment.

[0034] 3. The track segment uses the integral sheet metal first and second steel frames as the welding foundation for the inner steel frame, effectively improving the integrity of the inner steel frame. Prestressed anchor holes are set on both sides of the first and second steel frames to cooperate with the prestressed steel bar assemblies to achieve tensioning of the arc position of the inner steel frame, thereby applying prestress to the segment and improving the tensile strength of the segment.

[0035] 4. A pair of roving vibrating structures are set on both sides of the track segment processing equipment. During the pouring process, the pair of roving vibrating structures are used to perform synchronous vibration to ensure the uniformity of the segment pouring and further improve the structural strength of the segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the first three-dimensional structure of a high-strength track segment described in the present invention.

[0037] Figure 2 This is a schematic diagram of the second three-dimensional structure of a high-strength track segment described in the present invention.

[0038] Figure 3 This is a schematic diagram of the cross-sectional structure of a high-strength track segment described in the present invention.

[0039] Figure 4 This is a schematic diagram of the steel inner frame structure of a high-strength track segment described in the present invention.

[0040] Figure 5 This is a schematic diagram of the partial cross-sectional structure of a high-strength track segment described in the present invention.

[0041] Figure 6 This is a third stereoscopic structural schematic diagram of the high-strength track segment manufacturing equipment described in the present invention.

[0042] Figure 7 This is a schematic diagram of the main structure of a high-strength track segment manufacturing device according to the present invention.

[0043] Figure 8 This is a schematic diagram of the blasting structure of the high-strength track segment manufacturing equipment described in the present invention.

[0044] Figure 9 This is a schematic cross-sectional structural diagram of a high-strength track segment manufacturing device according to the present invention.

[0045] Figure 10 The invention provides a high-strength track segment manufacturing device Figure 9 Schematic diagram of the locally enlarged structure at point A in the middle.

[0046] Figure 11This is a fourth stereoscopic structural schematic diagram of the high-strength track segment manufacturing equipment described in the present invention.

[0047] Figure 12 This is a fifth stereoscopic structural schematic diagram of the high-strength track segment manufacturing equipment described in the present invention.

[0048] Figure 13 The invention provides a high-strength track segment manufacturing device Figure 6 Schematic diagram of the locally enlarged structure at point B in the middle.

[0049] In the figure: 1. Inner steel frame; 2. Concrete body; 3. Prestressed steel assembly; 4. Processing frame; 5. Casting support trough; 6. Support bottom mold; 7. Tour vibrating structure; 8. Prestressed pulling structure; 9. Adjustment assembly; 11. First steel frame; 12. Second steel frame; 13. Support rod; 14. Through slot; 15. Prestressed anchor hole; 16. Positioning rod; 17. Positioning insert; 21. Dovetail guide groove; 22. Dovetail guide block; 23. Embedded inner pipe; 24. Embedded threaded pipe; 31. Center pipe; 32. Pulling pipe; 41. Casting frame; 42. Casting bucket; 43. Guide rail; 51. Closed top cover; 52. Casting port; 53. Perforation; 54. Closed ring; 61. Pulling corresponding hole position; 62. Fixed anchor rod; 71. Circulating rail; 72. Vibrator; 73. Circulating linear motor; 74. Control slider; 75. Position switch; 81. Fixed plate; 82. Adjusting hole position; 83. Adjusting pulling screw rod; 84. Pulling plate; 85. Guide rod; 86. First prestressed counter-pull rod; 87. Second prestressed counter-pull rod; 88. Adjusting sleeve; 89. Adjusting knob; 91. Threaded groove; 92. Back-thrust screw; 93. Limiting ring washer; 94. Nut. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] See also Figures 1-13The present invention provides an implementation scheme: In the construction process of modern underground rail transit, track segments are a material commonly used in shield construction. The current production of track segments mainly relies on casting construction. However, in the application process of modern track segments, due to the characteristics of concrete, the track segments are prone to cracks on the inner arc side when subjected to geological movement or settlement force. This is because the tensile properties of concrete are poor, and the complex force direction of geological movement makes the segments susceptible to lateral forces, resulting in uneven force on the inner arc side of the concrete.

[0052] To address the above issues, there is currently a method of applying prestress on both sides of the steel tendons to increase the tensile strength of concrete. However, the current prestressed steel bar construction is mainly for straight bars. The prestressed method cannot be used to improve the tensile properties of the curved main bars of the track segments, which cannot provide more help to the tensile strength of the track segments.

[0053] Example 1: In response to the problems of the above-mentioned segment structure, the present application discloses a high-strength track segment, comprising a steel inner frame 1 and a concrete body 2. The concrete body 2 is wrapped around the steel inner frame 1. The steel inner frame 1 serves as the internal skeleton of the segment, and the concrete body 2 wrapped around the steel inner frame 1 serves as the supporting body of the segment. The concrete body 2 is a concrete slab with a missing arc ring. During use, when the track segment is installed after the shield is machined, a pair of connecting assemblies are provided on both sides of the concrete body 2. The pair of connecting assemblies can be used to connect adjacent track segments, and the shield pipeline can be constructed by splicing.

[0054] According to the instruction manual Figure 1 -Attached Figure 5 It can be seen that the above-mentioned steel inner frame 1 includes a first steel frame 11 and a second steel frame 12. The first steel frame 11 and the second steel frame 12 are both steel plates with fan-shaped structures. The first steel frame 11 and the second steel frame 12 are bent. Specifically, the first steel frame 11 and the second steel frame 12 are coaxially arranged. The first steel frame 11 and the second steel frame 12 are parallel to form the main reinforcement of the pipe segment. Different from the use of steel bar welding, the integrally bent steel plate structure is used as the main reinforcement for welding, which improves the integrity of the pipe segment steel bar, thereby facilitating the welding operation of the steel inner frame 1. The first steel frame 1 1 is arranged coaxially and parallel to the second steel frame 12. A plurality of support rods 13 arranged in a matrix are welded between the first steel frame 11 and the second steel frame 12. The plurality of support rods 13 are used as support to fill the space between the first steel frame 11 and the second steel frame. The support rods 13 act as supporting ribs. In order to ensure the strength of the segment after forming, the compressive strength of the concrete used in the concrete body 2 is at least 30 MPa, the concrete waterproof grade of the concrete body 2 is not less than the anti-seepage grade of P10, and the tensile strength of the concrete body 2 after forming is above 5 MPa.

[0055] Specifically, the arc diameter of the second steel frame 12 is smaller than the arc diameter of the first steel frame 11. The second steel frame 12 is close to the inner arc side of the concrete body 2, and the first steel frame 11 is close to the outer arc side of the concrete body 2. The second steel frame 12 and the first steel frame 11 are respectively provided with a plurality of pairs of through grooves 14, and the plurality of pairs of through grooves 14 are used for passing during the concrete pouring process.

[0056] According to the instruction manual Figure 1 -Attached Figure 5 It can be seen that the above-mentioned connection assembly includes a dovetail guide groove 21. A dovetail guide groove 21 is opened on one side of the concrete body 2. The dovetail guide groove 21 runs through both ends of the concrete body 2. A dovetail guide block 22 is provided on the other side of the concrete body 2. The dovetail guide block 22 matches the width of the dovetail guide groove 21. At least two pairs of embedded connecting rods are provided between the dovetail guide block 22 and the dovetail guide groove 21.

[0057] During the specific implementation process, the dovetail guide block 22 on the concrete main body 2 matches the dovetail guide groove 21. When the track segments are spliced, the dovetail guide block 22 on one side of the concrete main body 2 is inserted into the dovetail guide groove 21 of the concrete main body 2 of the other segment. The dovetail guide groove 21 and the dovetail guide block 22 guide the guiding effect of the dovetail guide groove 21, thereby realizing the splicing of the track segments. Then, the embedded connecting rods on the dovetail guide block 22 and the dovetail guide groove 21 correspond to each other. The embedded connecting rods include an embedded inner tube 23 arranged on one side of the dovetail guide groove 21, and an embedded threaded tube 24 is arranged on the corresponding dovetail guide block 22. After the segment splicing is completed, the embedded screw is used to pass through the embedded inner tube 23 and connect to the embedded threaded tube 24 to realize the splicing of the segments.

[0058] Furthermore, a prestressed steel bar assembly 3 is provided on the second steel frame 12 and connected to the first steel frame 11. A plurality of pairs of prestressed anchor holes 15 are provided on both sides of the annular direction of the first steel frame 11 and the second steel frame 12. Prestress is applied to the first steel frame 11 and the second steel frame 12 by the prestressed steel bar assembly 3. The prestressing method is adopted to perform prestressing before the first steel frame 11 and the second steel frame 12 are welded, so that the inner steel frame 1 is prestressed. After the pouring is completed, the tensioning effect is released, so that the pipe segment has tensile strength. The specific number of prestressed steel bar assemblies 3 is not less than 2, so that the prestress applied to the first steel frame 11 and the second steel frame 12 is more evenly distributed.

[0059] According to the instruction manual Figure 1 -Attached Figure 5It can be seen that the above-mentioned prestressed steel bar assembly 3 includes a central tube 31, which is welded to the center line of the second steel frame 12. The central axis of the central tube 31 coincides with the radial direction of the second steel frame 12 and the central tube 31 is welded to the first steel frame 11. A pair of pulling tubes 32 are staggered on both sides of the central tube 31. The two ends of the pair of pulling tubes 32 are respectively welded to the first steel frame 11 and the second steel frame 12. The central tube 31 and the pair of pulling tubes 32 apply prestress to the circumferential direction of the second steel frame 12.

[0060] During the specific implementation process, the central tube 31 of the prestressed steel bar assembly 3 corresponds to the center line of the first steel frame 11 and the second steel frame 12, a pair of pulling tubes 32 and the central tube 31 are arranged in the circumferential direction of the first steel frame 11 and the second steel frame 12, and a pair of pulling tubes 32 correspond to the inclined radial positions of the first steel frame 11 and the second steel frame 12. A plurality of prestressed anchor holes 15 are provided at the circumferential ends of the first steel frame 11 and the second steel frame 12, which are connected to the external fixed anchor rods 62 through the prestressed anchor holes 15 to realize the position limitation of the first steel frame 11 and the second steel frame 12, and also play the role of applying prestress.

[0061] According to the instruction manual Figure 1 -Attached Figure 5 It can be seen that in order to facilitate the corresponding arrangement and welding of the first steel frame 11 and the second steel frame 12, two pairs of positioning plug-in components are provided at the four corners of the first steel frame 11 and the second steel frame 12. The first steel frame 11 and the second steel frame 12 are positioned corresponding to each other through the two pairs of positioning plug-in components. When welding, the positioning plug-in components at the four corners of the first steel frame 11 and the second steel frame 12 are first plugged into each other to achieve the positioning of the first steel frame 11 and the second steel member, and then the welding is completed;

[0062] Specifically, the above-mentioned positioning plug-in assembly includes a positioning rod 16. The first steel frame 11 is provided with a positioning rod 16, and the second steel frame 12 is provided with a positioning tube 17 corresponding to the positioning rod 16. The positioning rod 16 and the positioning tube 17 are transitionally matched. The positioning rod 16 corresponds to the positioning tube 17. When the first steel frame 11 corresponds to the second steel frame 12, the positioning rod 16 is inserted into the positioning tube 17 to achieve the positioning effect of the first steel frame 11 and the second steel frame 12.

[0063] Example 2: According to the instructions attached Figure 6 -Attached Figure 13As can be seen, the present application discloses a high-strength rail segment manufacturing device, including a processing frame 4, which is a rectangular frame. A casting support trough 5 is provided on the processing frame 4, and a supporting bottom mold 6 is assembled on the casting support trough 5. A cavity matching the concrete body 2 is opened in the supporting bottom mold 6. A closed top cover 51 is hinged on the casting support trough 5, and a casting port 52 is provided on the closed top cover 51. A pulling corresponding hole position 61 is provided on the supporting bottom mold 6, which corresponds to the prestressed anchor hole 15.

[0064] During the specific implementation process, the processing frame 4 serves as the supporting base of the equipment, and the processing frame 4 is relied on to support the casting support trough 5, and then a pair of guide rails 43 are provided at the bottom of the processing frame 4, which are matched with the casting support trough 5 through the pair of guide rails 43. A pair of guide blocks are provided at the bottom of the casting support trough 5, and the pair of guide blocks are assembled on the pair of guide rails 43. A pair of linear screw modules are provided on the pair of guide rails 43, and the pair of linear screw modules are threadedly engaged with the pair of guide blocks. By rotating the pair of linear screw modules, the pair of linear screw modules are threadedly engaged with the pair of guide blocks, thereby driving the casting support trough 5 to move linearly, and then the casting support trough 5 drives the supporting bottom mold 6 thereon to move;

[0065] In the specific implementation process, the casting support trough 5 is used as a support to drive the supporting bottom mold 6 to move to the casting station. After the casting is completed, the supporting bottom mold 6 is driven to move to the maintenance station for subsequent construction. A closed top cover 51 is provided on the casting support trough 5. The top of the supporting bottom mold 6 can be sealed by the closed top cover 51, which plays a molding role in the casting process. The supporting bottom mold 6 can be removed from the casting support trough 5 during use. Before casting, the supporting bottom mold 6 is used to fix the steel inner frame 1 of the pipe segment, and then welding and casting are carried out. When welding, prestressed The anchor hole 15 cooperates with the pulling corresponding hole position 61, and then a fixed anchor rod 62 is installed on the pulling corresponding hole position 61 and is threadedly connected to the prestressed anchor hole 15. The fixed anchor rod 62 is used to penetrate the pulling corresponding hole position 61 and fix it to the prestressed anchor hole 15. The fixed anchor rod 62 is used to reversely pull the prestressed anchor hole 15, thereby reversely pulling the first steel frame 11 and the second steel frame 12, and applying prestress to the first steel frame 11 and the second steel frame 12, thereby applying prestress to the steel inner frame 1, and then performing the welding process of the support rod 13. After the support rod 13 is completely welded, the pouring construction is carried out;

[0066] According to the instruction manual Figure 6 -Attached Figure 12It can be seen that a pouring frame 41 is provided on the upper part of the processing frame 4, and a pouring bucket 42 is installed on the pouring frame 41. The bottom opening of the pouring bucket 42 corresponds to the pouring port 52. The pouring frame 41 is installed on the processing frame 4 to support and fix the pouring bucket 42. The mixed concrete is added to the pouring bucket 42, and the pouring bucket 42 is used to weigh the amount of concrete. Then, the pipeline at the bottom of the pouring bucket 42 corresponds to the supporting bottom mold 6 to realize the pouring of concrete.

[0067] In order to maintain the uniformity of pouring and ensure that all pouring is in place during the pouring process, a roving vibrating structure 7 is provided on the processing frame 4. Figure 11 -Attached Figure 12 It can be seen that the above-mentioned roving vibrating structure 7 performs mechanical vibration on the casting support trough 5;

[0068] According to the instruction manual Figure 6 -Attached Figure 12 It can be seen that in order to achieve the pulling effect on the first steel frame 11 and the second steel frame 12, the above-mentioned central tube 31 and the pair of pulling tubes 32 are both internally threaded tubes, and a first prestressed counter-tension rod 86 is connected and installed in the central tube 31, and a pair of second prestressed counter-tension rods 87 are threadedly connected to the pair of pulling tubes 32. The ends of the first prestressed counter-tension rod 86 and the pair of second prestressed counter-tension rods 87 are respectively connected with three adjusting sleeves 88. The first prestressed counter-tension rod 86 is threadedly connected to the central tube 31, serving as the prestress application point of the first prestressed counter-tension rod 86. Before pouring, after the pouring support trough 5 is moved to the pouring station, the first prestressed counter-tension rod 86 is limited and reversed by the adjusting sleeve 88, thereby achieving prestressed reverse pulling of the central tube 31, and the pair of second prestressed counter-tension rods 87 perform the same operation on the pair of pulling tubes 32, thereby achieving prestress application to the first steel frame 11 or the second steel frame 12;

[0069] According to the instruction manual Figure 6 -Attached Figure 10It can be seen that the middle sections of the first prestressed counter-pull rod 86 and the pair of second prestressed counter-pull rods 87 are both provided with an adjusting knob 89, and the first prestressed counter-pull rod 86 and the second prestressed counter-pull rod 87 are both connected to the central tube 31 and the pair of pulling tubes 32 in a threaded connection manner. The first prestressed counter-pull rod 86 and the second prestressed counter-pull rod 87 can be easily adjusted by the adjusting knob 89, and the prestress can be transferred for reverse pulling by the connection effect of the thread. The top end of the first prestressed counter-pull rod 86 or the second prestressed counter-pull rod 87 is matched with the adjusting sleeve 88 through the adjusting component 9 to achieve the function of limiting and applying prestress, and the first prestressed counter-pull rod 86 and the second prestressed counter-pull rod 87 can be disassembled after forming. The force counter-tension rod 87 can not only realize the reuse of the counter-tension rod, but also release the prestress, and apply prestress to the steel inner frame 1 of the concrete body 2. The first prestressed counter-tension rod 86 and a pair of second prestressed counter-tension rods 87 are connected with three adjustment components 9. The three adjustment components 9 correspond to the three adjustment sleeves 88. The adjustment components 9 cooperate with the adjustment sleeves 88 to specifically realize the limiting counter-tension effect of the first prestressed counter-tension rod 86 and the second prestressed counter-tension rod 87. The first prestressed counter-tension rod 86 and the second prestressed counter-tension rod 87 are both columnar rods. The adjusting knob 89 is a plate with a polygonal structure. The adjusting knob 89 is integrated with the first prestressed counter-tension rod 86 and the second prestressed counter-tension rod 87.

[0070] A fixed plate 81 is provided on the casting frame 41, and a prestressed pulling structure 8 is provided on the fixed plate 81 and connected to three adjusting sleeves 88. The prestressed pulling structure 8 can realize synchronous height adjustment of the three adjusting sleeves 88, and plays a positioning role for the adjusting sleeves 88, making it the basic point for prestressed reverse pulling force;

[0071] According to the instructions attached Figure 6 -Attached Figure 8 It can be seen that the above-mentioned prestressed pulling structure 8 includes an adjustment hole 82, an adjustment hole 82 is provided on the fixing plate 81, an adjustment pulling screw 83 is mounted on the adjustment hole 82, the bottom end of the adjustment pulling screw 83 is connected to a pulling plate 84, the pulling plate 84 is connected to the three adjustment sleeves 88 respectively by at least two screws, a pair of guide rods 85 are provided on both sides of the adjustment hole 82, a pair of guide rings are provided on the pulling plate 84, and the pair of guide rings are sleeved on the pair of guide rods 85;

[0072] In the specific implementation process, the fixed plate 81 is fixed to the casting machine frame 41 through a triangular reinforcement frame, and an adjusting pulling screw 83 is provided on the adjusting hole 82. By rotating the adjusting pulling screw 83 and threading it with the adjusting hole 82, the adjusting pulling screw 83 is moved, and then the adjusting pulling screw 83 drives the pulling plate 84 to move. The pulling plate 84 is fixedly connected to the three adjusting sleeves 88 by screws. After the height adjustment of the pulling plate 84 is completed, the adjusting sleeves 88 are positioned and installed using screws, so that the first prestressed counter-tension rod 86 and the second prestressed counter-tension rod 87 both pass through the corresponding adjusting sleeves 88, and then the adjusting assembly 9 and the adjusting sleeves 88 are used to push back to exert prestress on the first prestressed counter-tension rod 86 and the second prestressed counter-tension rod 87;

[0073] According to the instructions attached Figure 9 -Attached Figure 10 It can be seen that the above-mentioned adjustment component 9 includes a thread groove 91, and a thread groove 91 is opened on the first prestressed reverse pull rod 86. The thread groove 91 is internally threaded with a reverse thrust screw 92, and the reverse thrust screw 92 is in corresponding contact with the adjustment sleeve 88 through a limiting ring gasket 93.

[0074] During the specific implementation process, a perforation 53 is provided on the closed top cover 51 corresponding to the first prestressed counter-tension rod 86 and the second prestressed counter-tension rod 87. Before pouring, the closed cover plate on the casting support groove 5 is closed, and a closed ring 54 is provided on the inner side of the perforation 53 of the closed cover plate. The closed ring 54 contacts the top opening of the central tube 31 and a pair of pulling tubes 32, serving as an installation channel for the first prestressed counter-tension rod 86 and the second prestressed counter-tension rod 87. One end of the external thread of the first prestressed counter-tension rod 86 and the second prestressed counter-tension rod 87 passes through the perforation 53 on the closed cover plate, and the other end of the first prestressed counter-tension rod 86 and the second prestressed counter-tension rod 87 is located in the adjusting sleeve 88. The reverse thrust screw 92 is inserted into the adjusting sleeve 88 and the first prestressed counter-tension rod 86 or the second prestressed counter-tension rod 87. The internal threaded end of 7 is threadedly engaged, so that the limiting ring washer 93 at the end of the reverse push screw 92 reverses the adjusting sleeve 88, and the first prestressed reverse pull rod 86 and the second prestressed reverse pull rod 87 are rotated by a torque wrench with the adjusting sleeve 88 as the fulcrum, and the first prestressed reverse pull rod 86 and the second prestressed reverse pull rod 87 are adjusted to reverse pull the central tube 31 and a pair of pulling tubes 32 to achieve the adjustment of the reverse prestress. When the adjustment is completed, the external threaded end of the first prestressed reverse pull rod 86 and the external threaded end on the second prestressed reverse pull rod 87 are respectively threadedly connected with nuts 94, so that the nuts 94 fit the closed cover plate. After the pouring is completed, the first prestressed reverse pull rod 86 and the second prestressed reverse pull rod 87 are released from the cooperation with the adjusting sleeve 88, and the pre-tensioning of the steel bar inner frame 1 is maintained through the nut 94 and the closed cover plate.

[0075] According to the instructions attached Figure 11 -Attached Figure 13 It can be seen that the above-mentioned roving vibration structure 7 includes a roving track 71, which is assembled on the inner side of the casting frame 41, and a roving component is assembled on the roving track 71, and a vibrator 72 is assembled on the roving component. The vibrator 72 vibrates the side wall of the corresponding casting support trough 5.

[0076] The patrol assembly includes a patrol linear motor 73 , a control slider 74 is mounted on the patrol track 71 , a pair of position switches 75 are provided at both ends of the patrol track 71 , the control slider 74 is connected to the vibrator 72 , and the sliding end of the patrol linear motor 73 is connected to the control slider 74 .

[0077] During the specific implementation process, the patrol track 71 on the inner side of the casting frame 41 is used as a limiting channel, and then the patrol component on it is used to slide on the patrol component, thereby driving the vibrator 72 to perform a patrol motion on the patrol track 71, and the vibrator is used to vibrate the side wall of the casting support trough 5. The casting support trough 5 is in contact with the support bottom mold 6, and the vibration acts on the support bottom mold 6. During the casting process, the vibrator 72 is used to achieve vibration to ensure the uniformity and stability of the casting.

[0078] The processing flow of the above-mentioned track segment is as follows: first, prepare the steel bars to be welded, including the first steel frame 11, the second steel frame 12 and a plurality of supporting rods 13, fix the first steel frame 11 and the second steel frame 12 on the supporting bottom mold 6 through the fixing anchor rods 62, realize the prestressed tension of the first steel frame 11 and the second steel frame 12, and realize the fixation of the first steel frame 11 and the second steel frame 12, and then weld the plurality of supporting rods 13 in a matrix form between the first steel frame 11 and the second steel frame 12 to form a complete track frame, and weld the prestressed steel bar assembly 3 between the first steel frame 11 and the second steel frame 12. After the welding is completed, assemble the supporting bottom mold 6 on the casting support trough 5, and use the track to cast the cast track. The supporting trough 5 is transported to the pouring station, and the prestressed pulling structure 8 and the prestressed steel bar assembly on the pouring station are used to pull the center position of the first steel frame 11 and the second steel frame 12, and then the concrete is weighed by the pouring bucket 42 and poured into the supporting bottom mold 6 along the pouring mouth 52. During the pouring process, the supporting bottom mold 6 is vibrated by the circulating vibration structure 7 to ensure the stability of the pouring, and then the pouring supporting trough 5 is moved to drive the poured pipe segment to the curing station. After curing and forming, the track pipe segment is demoulded, and the first prestressed counter-tension rod 86 and the second prestressed counter-tension rod 87 are released after demoulding to complete the prestressing of the pipe segment, thereby improving the structural strength and tensile resistance of the pipe segment.

[0079] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength track segment, comprising a steel inner frame (1) and a concrete body (2), wherein the concrete body (2) is wrapped around the steel inner frame (1), and the concrete body (2) is a concrete slab in the shape of a missing arc ring, characterized in that: A pair of connecting components are provided on both sides of the concrete body (2); The steel inner frame (1) includes a first steel frame (11) and a second steel frame (12), the first steel frame (11) and the second steel frame (12) are both steel plates with fan-shaped structures, the first steel frame (11) and the second steel frame (12) are coaxially arranged in parallel, and a plurality of matrix-arranged support rods (13) are welded between the first steel frame (11) and the second steel frame (12); A prestressed steel bar assembly (3) is provided on the second steel frame (12) and is connected to the first steel frame (11); a plurality of pairs of prestressed anchor holes (15) are provided on both sides of the first steel frame (11) and the second steel frame (12); and the number of the prestressed steel bar assembly (3) is not less than 2; The prestressed steel bar assembly (3) includes a central tube (31), the central tube (31) is welded on the center line of the second steel frame (12), the central axis of the central tube (31) coincides with the radial direction of the second steel frame (12), and the central tube (31) is welded to the first steel frame (11), a pair of pulling tubes (32) are staggered on both sides of the central tube (31), and the two ends of the pair of pulling tubes (32) are respectively welded to the first steel frame (11) and the second steel frame (12), and the central tube (31) and the pair of pulling tubes (32) apply prestress to the circumferential direction of the second steel frame (12); A pair of pulling tubes (32) and a central tube (31) are arranged in a circumferential direction of the first steel frame (11) and the second steel frame (12); The central tube (31) and the pair of pulling tubes (32) are both internally threaded tubes. A first prestressed counter-tension rod (86) is connected and installed inside the central tube (31). A pair of second prestressed counter-tension rods (87) are threadedly connected to the pair of pulling tubes (32). The first prestressed counter-tension rod (86) and the pair of second prestressed counter-tension rods (87) are both connected to a high-strength track segment manufacturing device, and the high-strength track segment manufacturing device provides a prestressed counter-tensioning effect.

2. The high-strength track segment according to claim 1, characterized in that: The compressive strength of the concrete used in the concrete body (2) is at least 30 MPa, the waterproof grade of the concrete of the concrete body (2) is not less than the anti-seepage grade of P10, and the tensile strength of the concrete body (2) after being formed is above 5 MPa.

3. The high-strength track segment according to claim 2, characterized in that: The arc diameter of the second steel frame (12) is smaller than the arc diameter of the first steel frame (11), and the second steel frame (12) and the first steel frame (11) are respectively provided with a plurality of pairs of through grooves (14); the connection assembly includes a dovetail guide groove (21), one side of the concrete body (2) is provided with a dovetail guide groove (21), the dovetail guide groove (21) runs through both ends of the concrete body (2), and the other side of the concrete body (2) is provided with a dovetail guide block (22), the width of the dovetail guide block (22) matches that of the dovetail guide groove (21), and at least two pairs of pre-buried connecting rods are provided between the dovetail guide block (22) and the dovetail guide groove (21).

4. The high-strength track segment according to claim 3, characterized in that: Two pairs of positioning plug-in components are provided at the four corners of the first steel frame (11) and the second steel frame (12). The first steel frame (11) and the second steel frame (12) are positioned in correspondence with each other through the two pairs of positioning plug-in components. The positioning plug-in components include positioning rods (16). The first steel frame (11) is provided with positioning rods (16). The second steel frame (12) is provided with positioning tubes (17) corresponding to the positioning rods (16). The positioning rods (16) and the positioning tubes (17) are transitionally matched.

5. A high-strength rail segment manufacturing device, applied to the high-strength rail segment according to any one of claims 1 to 4, characterized in that: The processing frame (4) is a rectangular frame, the processing frame (4) is provided with a casting support trough (5), the casting support trough (5) is equipped with a support bottom mold (6), a cavity matching the concrete body (2) is provided in the support bottom mold (6), a closed top cover (51) is hingedly connected to the casting support trough (5), a casting port (52) is provided on the closed top cover (51), and a pulling corresponding hole position (61) is provided on the support bottom mold (6) corresponding to the prestressed anchor hole (15); A pouring frame (41) is provided on the upper portion of the processing frame (4), a pouring hopper (42) is mounted on the pouring frame (41), and a bottom opening of the pouring hopper (42) corresponds to a pouring port (52); A roving vibrating structure (7) is provided on the processing frame (4), and the roving vibrating structure (7) mechanically vibrates the inside of the casting support trough (5); A fixing plate (81) is provided on the casting frame (41), and a prestressed tensioning structure (8) is provided on the fixing plate (81); The first prestressed counter-tension rod (86) and the pair of second prestressed counter-tension rods (87) are respectively connected to three adjustment sleeves (88); the middle sections of the first prestressed counter-tension rod (86) and the pair of second prestressed counter-tension rods (87) are both provided with adjustment knobs (89); the first prestressed counter-tension rod (86) and the pair of second prestressed counter-tension rods (87) are connected to three adjustment components (9); the three adjustment components (9) correspond to the three adjustment sleeves (88); The adjustment assembly (9) includes a thread groove (91), the first prestressed reverse pull rod (86) is provided with a thread groove (91), the thread groove (91) is internally threadedly connected to a reverse thrust screw (92), and the reverse thrust screw (92) is in corresponding contact with the adjustment sleeve (88) via a limiting ring washer (93).

6. The high-strength rail segment manufacturing equipment according to claim 5, characterized in that: A pair of guide rails (43) are provided at the bottom of the processing frame (4), a pair of guide blocks are provided at the bottom of the casting support groove (5), the pair of guide blocks are assembled on the pair of guide rails (43), a pair of linear screw modules are provided on the pair of guide rails (43), and the pair of linear screw modules are threadedly engaged with the pair of guide blocks.

7. The high-strength rail segment manufacturing equipment according to claim 6, characterized in that: The casting support groove (5) is provided with a mounting hole corresponding to the pulling hole position (61), and a fixing anchor rod (62) is installed on the mounting hole. The fixing anchor rod (62) passes through the pulling hole position (61) and is threadedly connected to the prestressed anchor hole (15).

8. The high-strength rail segment manufacturing equipment according to claim 7, characterized in that: The first prestressed counter-tension rod (86) and the second prestressed counter-tension rod (87) are both columnar rods, and the adjustment knob (89) is a plate with a polygonal structure.

9. The high-strength rail segment manufacturing equipment according to claim 8, characterized in that: The closed top cover (51) is provided with perforations (53) corresponding to the first prestressed counter-tension rod (86) and the second prestressed counter-tension rod (87).

10. The high-strength rail segment manufacturing equipment according to claim 9, characterized in that: The roving vibrating structure (7) comprises a roving track (71), the roving track (71) being mounted on the inner side of the casting frame (41), the roving track (71) being mounted with a roving assembly, the roving assembly being mounted with a vibrator (72), the vibrator (72) vibrating the side wall of the corresponding casting support trough (5); The patrol assembly comprises a patrol linear motor (73); a control slider (74) is mounted on the patrol track (71); the control slider (74) is connected to the vibrator (72); and a sliding end of the patrol linear motor (73) is connected to the control slider (74).

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