A prefabrication production line and production process for high-strength concrete lining segments

Abstract

The present invention relates to a prefabrication production line and production process for high-strength concrete lined pipe segments. The prefabrication production line includes a mold walking unit, a plurality of pipe segment molds, a concrete pouring unit, a curing kiln, and a pipe segment demoulding unit. The concrete pouring unit includes a feeding device, a lifting device, a cover plate with a pouring port, a pneumatic clamping device, an adaptive flipping device, and a rough trowel. The prefabrication production process includes the steps of assembling pipe segment molds, installing steel skeletons and embedded parts, pouring and vibrating concrete, finishing concrete, steam curing of pipe segments, and demoulding of pipe segments. The prefabrication production line of the present invention can achieve the purpose of improving production efficiency while ensuring the quality of the pipe segments. In addition, the prefabrication production process of the present invention is mainly operated by the prefabrication production line machinery, and has the advantages of high production efficiency and good pipe segment quality.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe segment manufacturing, and in particular to a prefabrication production line and production process for high-strength concrete lined pipe segments. Background Art

[0002] Segments are prefabricated curved structures used to support the surrounding rock in shield tunneling machines and TBMs (full-face hard rock tunnel boring machines). They are typically formed by binding steel bars together and then pouring high-strength, impermeable concrete in a single pass. As the primary assembly component in tunnel construction, segments serve as the tunnel's primary support structure, bearing the earth and water pressures and certain special loads imposed by the surrounding rock. Segmental linings are tunnel linings assembled from prefabricated components in factories or on-site. The use of prefabricated linings is a trend in the development of underground engineering. The lining structure consists of multiple rings of segments assembled along the longitudinal direction of the tunnel. The segments are connected by bolts. The inner and outer surfaces of the segments are smooth, curved, and rubber waterstops are installed on all four sides. Grouting holes, locating holes, and connection holes are also provided on the segments. After the segments are assembled into rings using the locating and connection holes, grouting is injected through the grouting holes into the gaps between the segments and the surrounding rock, forming a single, integrated structure.

[0003] Chinese patent publication number CN107901208A discloses a fully automatic production line for prefabricated reinforced concrete segments, which includes a mold walking system, a concrete pouring system, a curing kiln door system, a curing chamber temperature control system, a segment demoulding system, and a video monitoring system; the mold walking system includes a straight roller conveyor, a transverse ferry mechanism, and a translational mother-and-child trolley, wherein the straight roller conveyor can realize the movement of the segment mold outside the curing kiln, the transverse ferry mechanism can realize the movement of the segment mold between the two roller conveyors, and the translational mother-and-child trolley can realize the segment mold from the straight roller conveyor into the curing kiln or from the curing kiln to the straight roller conveyor; the concrete pouring system completes the concrete pouring and vibration molding of the segment through a concrete conveyor rack, a high hopper, a low hopper, and a vibration device; the segment demoulding system includes a vacuum suction cup, a flipping machine, and a demoulding rack.

[0004] The above-mentioned existing technical solutions have the following defects: before the above-mentioned pipe segment mold enters the concrete pouring system, it is necessary to manually cover the pipe segment mold with a lifting device. After the pouring and vibration are completed, the cover is manually opened for rough finishing, which directly increases the workload and processing costs; in addition, after the cover is opened, the construction space for rough finishing becomes smaller, which is not conducive to the finishing operation and appearance monitoring of the pipe segment, and easily affects the quality of the pipe segment. The existence of these problems has to some extent restricted the development of the pipe segment prefabrication production line and its prefabrication production process. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the first purpose of the present invention is to provide a prefabricated production line for high-strength concrete lining pipe segments, which solves the problem of the existing production line requiring the disassembly and assembly of cover plates and manual rough finishing before and after concrete pouring and vibration, thereby achieving the advantages of improving production efficiency and pipe segment quality.

[0006] The second object of the present invention is to provide a prefabrication production process for high-strength concrete lining segments, which has the advantages of high production efficiency and good segment quality.

[0007] To achieve the above first object, the present invention provides the following technical solutions:

[0008] A prefabrication production line for high-strength concrete lined segments comprises a mold walking unit, a plurality of segment molds slidably mounted on the mold walking unit, and a concrete pouring unit, a curing kiln and a segment demoulding unit sequentially arranged on the walking path of the segment mold. The concrete pouring unit comprises a feeding device, a lifting device, a cover plate with a pouring port, a pneumatic clamping device and an adaptive flipping device arranged on the cover plate, and a roughing plate arranged at the output end of the adaptive flipping device. The cover plate is installed at the output end of the lifting device with the pouring port facing the discharge port of the feeding device. The clamping end of the pneumatic clamping device selectively contacts the two side surfaces of the segment mold. The flipping path of the roughing plate passes through the downstream end of the cover plate and the arc-shaped top surface of the segment mold in sequence.

[0009] By adopting the above technical solution, in the actual production process, the segment molds are arranged in sequence on the mold walking unit, and the segment molds are equipped with longitudinal vibrators and transverse vibrators. The mold walking unit can drive these segment molds to pass through the concrete pouring unit, curing kiln and segment demoulding unit in sequence to complete the steps of concrete pouring, vibration and rough finishing, segment steam curing and segment demoulding respectively; when the segment mold passes under the feeding device, the cover plate is disassembled and assembled on the segment mold by the lifting device and the pneumatic clamping device, that is, the cover plate and the segment mold are a split structure, and only one cover plate is needed for a prefabrication production line. Since the cover plate does not enter the next process with the segment mold, it does not affect the subsequent rough finishing operation; in addition, after the cover plate is removed, the segment mold is away from the feeding device. During the movement, the rough trowel is driven by the adaptive turning device and fits into the curved top surface of the segment mold. This process is assisted by the lifting mechanism to control the height of the rough trowel. As the segment mold moves, the rough trowel moves across the concrete surface to remove excess concrete and complete the rough troweling operation. In the subsequent movement of the segment mold, the medium and fine troweling can be completed. In this process, the lifting device and the pneumatic clamping device are used to mechanically control the disassembly and assembly of the cover plate on the segment mold, which directly eliminates the shortcomings of the original need to match the cover plate and the segment mold one by one, and is assisted by the adaptive turning device and the rough trowel to directly perform the rough troweling operation during the movement of the segment mold. The troweling operation is less affected by human factors, which can ensure the quality of the segment while achieving the purpose of improving production efficiency.

[0010] Preferably, the lifting device includes a truss spanning the mold travel unit, a proximity switch and multiple lifting cylinders mounted on the truss, and a lifting chain disposed between the piston rods of the lifting cylinders and the cover plate. The proximity switch is electrically connected to the lifting cylinder, the pneumatic clamping device, and the segment travel unit, with the sensing end of the proximity switch facing the downstream end of the segment mold below the feeding device. As the segment mold travels and passes below the feeding device, the downstream end of the segment mold gradually enters the sensing range of the proximity switch. At this point, the proximity switch receives information about the segment mold's position and controls the activation of the lifting cylinder and pneumatic clamping device, while deactivating the segment travel unit, thereby securing the cover plate to the segment mold. This simple and quick operation effectively saves labor costs and improves production efficiency.

[0011] Preferably, the pneumatic clamping devices are provided in multiple numbers and arranged in parallel along the length of the cover plate. The pneumatic clamping devices include a spring airbag located in the center, and a crossbar, a vertical slide, an elastic hinged bracket, and a fastening hook symmetrically arranged on either side of the spring airbag. One end of the crossbar is mounted on the spring airbag, and the other end passes through the vertical slide and is hinged to the fastening hook. The section of the fastening hook adjacent to the crossbar is slidably connected to the hinged end of the elastic hinged bracket. The crossbar, vertical slide, elastic hinged bracket, and fastening hook form a connecting rod transmission structure to clamp and secure the segment mold during the expansion and contraction of the spring airbag. To further enhance the stability of the cover plate installation, the fastening hook can cooperate with a recessed portion of the steel mold on the side of the segment mold and be bent to fit on the segment mold.

[0012] Furthermore, the elastic hinge bracket includes a pair of support plates mounted on the cover plate, a hinge shaft rotatably connected to the pair of support plates, a slider mounted on the hinge shaft, and a torsion spring disposed between the pair of support plates and sleeved on the hinge shaft. The two side surfaces of the fastening hook are in sliding contact with the surfaces of the pair of support plates, and the fastening hook is provided with a slide groove that slidably engages with the slider. The above structure has high transmission efficiency and facilitates the clamping and fixing of the fastening hook.

[0013] Preferably, the adaptive flipping device includes a controller, a flange frame, a flip motor arranged on the flange frame, a flip shaft rotatably connected to the flange frame and connected to the output shaft of the flip motor through a transmission member, a support plate arranged on the flip shaft, a pressure sensor arranged on the support plate, and an adaptive adjustment member and a first elastic member arranged on the rough wiping plate. The controller is electrically connected to the lifting device, the pressure sensor and the adaptive adjustment member. The detection end of the pressure sensor conflicts with the moving end of the adaptive adjustment member, and the end of the first elastic member is fixed to the support plate. After the cover plate is separated from the segment mold, the flip motor drives the flip shaft to rotate through the transmission part, so as to drive the support plate and the rough trowel plate to flip around the flip shaft. When the rough trowel plate rotates to contact the surface of the segment mold, the pressure sensor is subjected to the pressure transmitted by the adaptive sensor and sends the pressure signal to the controller. At the same time, the adaptive adjustment part also sends the adaptive adjustment position signal to the controller. The controller is used to receive the position signal and compare the pressure signal with the predetermined pressure value, and then control the lifting device to perform lifting operations, so that the appropriate pre-pressure can be maintained between the rough trowel plate and the concrete on the segment mold, and the surface flatness of the concrete after rough troweling is better.

[0014] Furthermore, the transmission member is a gear transmission structure or a chain transmission structure, so as to realize the fixed-point flipping operation of the rough wiping board.

[0015] Furthermore, the first elastic member is a plurality of springs arranged between the rough wiping plate and the supporting plate.

[0016] Furthermore, the adaptive adjustment member includes a second elastic member with a reader that slides sequentially from the inside to the outside, a sleeve with a magnetic scale, and a first linear bearing provided on the roughing plate. The sleeve is provided outside the pressure sensor and fixed to the support plate. One end of the second elastic member close to the reader contacts the detection end of the pressure sensor, and the other end is fixed to the roughing plate. The reader contacts the magnetic scale, and the magnetic scale is electrically connected to the controller. As the segment mold moves, the distance between its curved top surface and the support plate first decreases and then increases. At this time, the second elastic member and the first elastic member are used to perform adaptive spacing adjustment, and the reader also moves on the magnetic scale. The magnetic scale is used to send a position signal of the reader's travel distance to the controller, so that the controller can adjust the lifting distance of the lifting device according to the position signal, thereby completing the constant pressure roughing operation and ensuring the quality of the segment.

[0017] Furthermore, the second elastic member includes a fixed plate fixed on the rough wiping plate, a second linear bearing arranged on the fixed plate, a positioning sleeve slidably inserted into the second linear bearing, an abutment plate arranged on the positioning sleeve and abutting against the detection end of the pressure sensor, and a compression spring arranged in the positioning sleeve, the reader is arranged on the abutment plate, and the two ends of the compression spring are respectively fixed to the fixed plate and the abutment plate.

[0018] To achieve the above second purpose, the present invention provides the following technical solutions:

[0019] A prefabrication production process for high-strength concrete lined pipe segments comprises the steps of assembling pipe segment moulds, installing steel bar skeletons and embedded parts, pouring and vibrating concrete, forming and plastering concrete, steam curing the pipe segments, and demoulding the pipe segments using the above-mentioned prefabrication production line.

[0020] By adopting the above technical solution, the steps of concrete pouring and vibration of the pipe segments, concrete forming and finishing, steam curing of the pipe segments and demoulding of the pipe segments are mechanically operated by the prefabrication production line, which has the advantages of high production efficiency and good pipe segment quality.

[0021] Preferably, in the step of pouring and vibrating concrete, a plurality of groups of longitudinal vibrators and transverse vibrators are provided on the segment mold, and these longitudinal vibrators and transverse vibrators are evenly distributed along the length direction of the segment mold; when the concrete pouring unit is unloading, the concrete unloading speed is controlled to be 0.06~0.08m³ / s, and the transverse vibrator is turned on until the top surface of the concrete is 4~8cm away from the bottom surface of the cover plate, and then the transverse vibrator is closed and the longitudinal vibrator is turned on until the remaining concrete is poured, and then the two outermost longitudinal vibrators of the segment mold are closed, and the vibration is continued for 2~4min.

[0022] Preferably, in the step of pouring and vibrating the concrete, the concrete is composed of the following raw materials in parts by weight: 400-420 parts of cement, 150-180 parts of silica fume, 600-650 parts of machine-made sand, 800-850 parts of gravel with a particle size of 5-25 mm, 130-140 parts of copper-plated steel fiber with a length of 11-15 mm, 4-6 parts of sodium calcium phosphosilicate, 6-8 parts of styrene-methyl methacrylate resin, 4-6 parts of microcrystalline cellulose, 8-12 parts of a water reducer obtained by modifying polycarboxylic acid molecules with β-cyclodextrin, and 140-150 parts of water.

[0023] Furthermore, in the machine-made sand, the weight ratio of particles with a particle size greater than 4.75 mm is 0-5%, the weight ratio of particles with a particle size of 4.75-2.36 mm is 5-20%, the weight ratio of particles with a particle size of 2.36-1.18 mm is 10-30%, the weight ratio of particles with a particle size of 1.18-0.60 mm is 20-31%, the weight ratio of particles with a particle size of 0.60-0.30 mm is 20-30%, the weight ratio of particles with a particle size of 0.30-0.15 mm is 5-15%, and the weight ratio of particles with a particle size of less than 0.15 mm is 0-15%.

[0024] Specifically, the production process includes the following steps:

[0025] S1 Segment mold assembly: First, clean the concrete residue inside and outside the segment mold and on the bottom, then assemble the segment mold and evenly apply the release agent on the inner surface of the segment mold. After assembly, test the accuracy of the segment mold;

[0026] S2: Installation of steel skeleton and embedded parts: First, hoist the steel skeleton into the segment mold obtained in S1, then install the embedded parts, and then install the arc mandrel coated with release agent;

[0027] S4 concrete pouring and vibrating: the mold walking unit first transports the segment mold obtained in S2 to the bottom of the concrete pouring unit, the lifting device then drives the cover plate to descend and cover the segment mold, the pneumatic clamping device clamps the segment mold, and then concrete is poured through the concrete pouring unit. At the same time, the longitudinal vibrator and transverse vibrator of the segment mold are started in batches and vibrated;

[0028] S5 concrete forming and finishing: After vibrating and forming, the lifting device first causes the cover plate to rise and separate from the segment mold. The flip adaptive device drives the rough trowel to rotate and contact the curved top surface of the segment mold. The mold moving unit continues to transport the segment mold. The rough trowel scrapes off excess concrete during the movement of the segment mold. After the concrete on the segment mold absorbs water, a steel trowel is used to perform medium and fine finishing. The flatness error of the outer curved surface of the segment is controlled to be less than ±2.0mm. During the medium and fine finishing process, before the initial setting of the concrete, the curved core rod is removed.

[0029] S6: Steam curing of the segment. After vibration, let it stand at room temperature for 3-4 hours. The mold moving unit first transports the segment mold obtained in S5 to the curing kiln. The curing temperature is raised to 50-53°C at a rate of 15-20°C / h, kept at this temperature for 2 hours, and then dropped to room temperature at a rate of 10-14°C / h.

[0030] S7 segment demoulding: the segment on the segment mold is demoulded when its strength reaches 40%. The segment demoulding unit uses a vacuum suction cup hoist to lift the segment, and uses a flip frame to flip the segment to obtain the segment.

[0031] In summary, the beneficial technical effects of the present invention are:

[0032] 1. The prefabrication production line of the present invention uses a lifting device and a pneumatic clamping device to mechanically control the assembly and disassembly of the cover plate on the segment mold, directly eliminating the disadvantage of the previous one-to-one matching of the cover plate and the segment mold. Supplemented by an adaptive turning device and a roughing plate, the roughing operation is directly performed during the movement of the segment mold. The smoothing operation is less affected by manual labor, which can ensure the quality of the segment while achieving the goal of improving production efficiency.

[0033] 2. In the prefabrication production process of the present invention, the steps of concrete pouring and vibrating of the pipe segments, concrete forming and finishing, steam curing of the pipe segments, and demoulding of the pipe segments are mechanically operated by the prefabrication production line, which has the advantages of high production efficiency and good pipe segment quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the prefabrication production line of Example 1 of the present invention.

[0035] Figure 2 3 is a structural schematic diagram of the concrete pouring unit of Example 2 of the present invention in the concrete pouring state.

[0036] Figure 3 3 is a schematic structural diagram of the concrete pouring unit of Example 3 of the present invention in a roughly smoothed state.

[0037] Figure 4 It is a schematic diagram of the connection relationship between the cover plate, the pneumatic clamping device and the pipe segment mold in Example 4 of the present invention.

[0038] Figure 5 Schematic diagram of the connection relationship between the elastic hinge bracket and the fastening hook in Example 4 of the present invention.

[0039] Figure 6 It is a schematic diagram of the connection relationship between the cover plate, the adaptive turning device, the rough smear plate and the pipe segment mold of Example 5 of the present invention.

[0040] Figure 7It is a structural diagram of the adaptive flipping device of Example 5 of the present invention.

[0041] In the figure, 101, mold travel unit; 102, segment mold; 103, concrete pouring unit; 104, curing kiln; 105, segment demoulding unit; 2, feeding device; 21, conveying guide rail; 22, lower hopper; 23, upper hopper; 3, lifting device; 31, truss; 32, proximity switch; 33, lifting cylinder; 34, lifting chain; 4, cover plate; 41, pouring port; 5, pneumatic clamping device; 51, spring airbag; 52, crossbar; 53, vertical slide; 54, elastic hinge bracket; 541, support plate; 542, hinge shaft; 543, slide Block; 544, torsion spring; 55, fastening hook; 6, adaptive flip device; 61, controller; 62, flange frame; 63, flip motor; 64, transmission part; 65, flip shaft; 66, support plate; 67, pressure sensor; 68, adaptive adjustment part; 681, reading head; 682, second elastic part; 6821, fixing plate; 6822, second linear bearing; 6823, positioning sleeve; 6824, abutment plate; 6825, compression spring; 683, magnetic scale; 684, sliding sleeve; 685, first linear bearing; 69, first elastic part; 7, rough wiping plate. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further explained below with reference to the accompanying drawings and specific implementation methods.

[0043] Example 1: Reference Figure 1 The present invention discloses a prefabrication production line for high-strength concrete-lined segments, comprising a mold traveling unit 101, a plurality of segment molds 102 slidably mounted on the mold traveling unit 101, and a concrete pouring unit 103, a curing kiln 104, and a segment demoulding unit 105 sequentially arranged along the travel path of the segment molds 102. The mold traveling unit 101 is used to drive the segment molds 102 through the concrete pouring unit 103, the curing kiln 104, and the segment demoulding unit 105 in sequence to complete the steps of concrete pouring, vibration, and rough finishing, segment steam curing, and segment demoulding, respectively. This ensures segment quality while improving production efficiency.

[0044] Correspondingly, the present invention also discloses a prefabrication production process for high-strength concrete-lined pipe segments, comprising the steps of assembling the pipe segment mold 102, installing the steel reinforcement skeleton and embedded components, pouring and vibrating the concrete, forming and finishing the concrete, steam curing the pipe segments, and demolding the pipe segments using the aforementioned prefabrication production line. The steps of pouring and vibrating the concrete, forming and finishing the concrete, steam curing the pipe segments, and demolding the pipe segments are mechanically performed on the prefabrication production line, resulting in high production efficiency and high-quality pipe segments.

[0045] Example 2: Reference Figure 2 , a prefabrication production line for high-strength concrete lining segments disclosed in the present invention, differs from Example 1 in that the concrete pouring unit 103 includes a feeding device 2, a lifting device 3, a cover plate 4 with a pouring port 41, a pneumatic clamping device 5 and an adaptive turning device 6 disposed on the cover plate 4, and a roughing plate 7 disposed at the output end of the adaptive turning device 6. The cover plate 4 is mounted at the output end of the lifting device 3 with the pouring port 41 facing the discharge port of the feeding device 2. The clamping end of the pneumatic clamping device 5 selectively contacts the two side surfaces of the segment mold 102. The turning path of the roughing plate 7 sequentially passes through the downstream end of the cover plate 4 and the curved top surface of the segment mold 102.

[0046] In the actual production process, the segment molds 102 are arranged in sequence on the mold walking unit 101, and the segment molds 102 are equipped with longitudinal vibrators and transverse vibrators. The mold walking unit 101 can drive these segment molds 102 to pass through the concrete pouring unit 103, the curing kiln 104 and the segment demoulding unit 105 in sequence to complete the steps of concrete pouring and vibration, segment steam curing and segment demoulding respectively; when the segment mold 102 passes under the feeding device 2, the cover plate 4 is disassembled and assembled on the segment mold 102 through the lifting device 3 and the pneumatic clamping device 5, that is, the cover plate 4 and the segment mold 102 are a split structure, and a prefabrication production line only needs one cover plate 4. Since the cover plate 4 does not enter the next process with the segment mold 102, it does not affect the subsequent rough finishing operation. In addition, after the cover plate 4 is removed and the segment mold 102 moves away from the feeding device 2, the rough trowel 7 is driven by the adaptive flipping device 6 to fit the curved top surface of the segment mold 102. This process is assisted by the lifting mechanism to adjust the height of the rough trowel 7. As the segment mold 102 moves, the rough trowel 7 moves across the concrete surface to remove excess concrete and complete the rough troweling operation. During the subsequent movement of the segment mold 102, the medium and fine troweling can be completed. In this process, the lifting device 3 and the pneumatic clamping device 5 are used to mechanically control the assembly and disassembly of the cover plate 4 on the segment mold 102, directly eliminating the shortcomings of the original need for the cover plate 4 and the segment mold 102 to be matched one by one. The adaptive flipping device 6 and the rough trowel 7 are used to directly perform the rough troweling operation during the movement of the segment mold 102. The troweling operation is less affected by human factors and can achieve the purpose of improving production efficiency while ensuring the quality of the segment.

[0047] Example 3: Reference Figure 3, which is a prefabrication production line for high-strength concrete-lined segments disclosed in the present invention. It differs from Example 2 in that the lifting device 3 includes a truss 31 spanning the mold travel unit 101, a proximity switch 32 and four lifting cylinders 33 disposed on the truss 31, and a lifting chain 34 disposed between the piston rods of the lifting cylinders 33 and the cover plate 4. The proximity switch 32 is electrically connected to the lifting cylinder 33, the pneumatic clamping device 5, and the segment travel unit. The sensing end of the proximity switch 32 faces the downstream end of the segment mold 102 below the feeding device 2. In addition, the feeding device 2 includes a conveying rail 21 and a lower hopper 22 disposed on the truss 31, and an upper hopper 23 slidably mounted on the conveying rail 21.

[0048] As the segment mold 102 moves and passes beneath the feeding device 2, the downstream end of the segment mold 102 gradually enters the sensing range of the proximity switch 32. At this point, the proximity switch 32 receives the position information of the segment mold 102 and controls the lifting cylinder 33 and the pneumatic clamping device 5 to start and the segment moving unit to close, so that the cover plate 4 is fixed to the segment mold 102. This is a simple and quick operation that can effectively save labor costs and improve production efficiency. Prior to this, the upper hopper 23 receives concrete from the concrete mixing plant in advance and slides to the top of the lower hopper 22 via the conveyor guide rails 21. The concrete is then discharged into the lower hopper 22 for storage. After the cover plate 4 is closed, the concrete is discharged into the segment mold 102 through the pouring port 41 via the lower hopper 22.

[0049] Example 4: Reference Figure 4 and Figure 5 , is a prefabrication production line for high-strength concrete-lined segments disclosed in the present invention. The difference from Example 2 is that four pneumatic clamping devices 5 are provided and arranged in parallel along the length of the cover plate 4. The pneumatic clamping device 5 includes a spring airbag 51 located in the center, and a crossbar 52, a vertical slide 53, an elastic hinged bracket 54, and a fastening hook 55 symmetrically arranged on both sides of the spring airbag 51. One end of the crossbar 52 is provided on the spring airbag 51, and the other end passes through the vertical slide 53 and is hinged to the fastening hook 55. The section of the fastening hook 55 near the crossbar 52 is slidably connected to the hinged end of the elastic hinged bracket 54. The crossbar 52, the vertical slide 53, the elastic hinged bracket 54, and the fastening hook 55 are used to form a connecting rod transmission structure to complete the clamping and fixation of the segment mold 102 during the expansion and contraction process of the spring airbag 51. In order to further improve the stability of the installation of the cover plate 4, the fastening hook 55 can cooperate with the recessed part of the side steel mold of the tube segment mold 102, and the bent hook is provided on the tube segment mold 102.

[0050] The elastic hinge bracket 54 comprises a pair of support plates 541 mounted on the cover plate 4, a hinge shaft 542 rotatably connected to the support plates 541, a slider 543 mounted on the hinge shaft 542, and a torsion spring 544 disposed between the support plates 541 and sleeved around the hinge shaft 542. The fastening hook 55 has two side surfaces that slide in contact with the surfaces of the support plates 541, and a slot is defined on the fastening hook 55 that slidably engages the slider 543. This structure provides high transmission efficiency and facilitates the clamping and securing of the fastening hook 55.

[0051] Example 5: Reference Figure 5 and Figure 6 , is a prefabricated production line for high-strength concrete lining segments disclosed in the present invention, which differs from Example 2 in that the adaptive turning device 6 includes a controller 61 (refer to Figure 4 ), flange frame 62, a flip motor 63 mounted on flange frame 62, a flip shaft 65 rotatably connected to flange frame 62 and connected to the output shaft of flip motor 63 via a transmission member 64, a support plate 66 mounted on flip shaft 65, a pressure sensor 67 mounted on support plate 66, and an adaptive adjustment member 68 and a first elastic member 69 mounted on rough wiping plate 7. The controller 61 is electrically connected to the lifting device 3, the pressure sensor 67, and the adaptive adjustment member 68. The detection end of the pressure sensor 67 contacts the moving end of the adaptive adjustment member 68, and the end of the first elastic member 69 is fixed to the support plate 66. The transmission member 64 is a bevel gear transmission structure, and the first elastic member 69 is a pair of inner and outer springs mounted between the rough wiping plate 7 and the support plate 66.

[0052] After the cover plate 4 is separated from the segment mold 102, the flipping motor 63 drives the flipping shaft 65 to rotate through the transmission part 64, so as to drive the support plate 66 and the rough trowel plate 7 to flip around the flipping shaft 65. When the rough trowel plate 7 rotates to contact the surface of the segment mold 102, the pressure sensor 67 is subjected to the pressure transmitted by the adaptive sensor and sends the pressure signal to the controller 61. At the same time, the adaptive adjustment part 68 also sends the adaptive adjustment position signal to the controller 61. The controller 61 is used to receive the position signal and compare the pressure signal with the predetermined pressure value, and then control the lifting device 3 to perform the lifting operation so that the appropriate pre-pressure can be maintained between the rough trowel plate 7 and the concrete on the segment mold 102, and the surface flatness of the concrete after rough troweling is better.

[0053] Furthermore, the adaptive adjustment member 68 includes a second elastic member 682 with a reader 681, a sleeve 684 with a magnetic scale 683, and a first linear bearing 685 mounted on the rough wiper plate 7, which are slidably mounted from the inside out. The sleeve 684 is mounted outside the pressure sensor 67 and fixed to the support plate 66. The end of the second elastic member 682, closest to the reader 681, contacts the detection end of the pressure sensor 67, while the other end is fixed to the rough wiper plate 7. The reader 681 contacts the magnetic scale 683, which is electrically connected to the controller 61. Among them, the second elastic member 682 includes a fixed plate 6821 fixed on the rough wiping plate 7, a second linear bearing 6822 arranged on the fixed plate 6821, a positioning sleeve 6823 slidably inserted in the second linear bearing 6822, an abutment plate 6824 arranged on the positioning sleeve 6823 and abutting against the detection end of the pressure sensor 67, and a compression spring 6825 arranged in the positioning sleeve 6823, the reading head 681 is arranged on the abutment plate 6824, and the two ends of the compression spring 6825 are respectively fixed on the fixed plate 6821 and the abutment plate 6824. As the segment mold 102 moves, the distance between its curved top surface and the support plate 66 first decreases and then increases. At this time, the second elastic member 682 and the first elastic member 69 are used to perform adaptive spacing adjustment, and the reader 681 also moves on the magnetic scale 683. The magnetic scale 683 is used to send the position signal of the travel distance of the reader 681 to the controller 61, so that the controller 61 can adjust the lifting distance of the lifting device 3 according to the position signal, and then complete the constant pressure rough leveling operation to ensure the quality of the segment.

[0054] Example 6: A prefabrication production process for a high-strength concrete lining segment disclosed in the present invention is different from Example 2 in that it includes the following steps:

[0055] S1: Assemble the segment mold 102. First, clean the concrete residue on the inner and outer periphery and bottom of the segment mold 102. Then assemble the segment mold 102 and evenly apply a release agent on the inner surface of the segment mold 102. After assembly is completed, test the accuracy of the segment mold 102.

[0056] S2: Installation of steel skeleton and embedded parts: First, hoist the steel skeleton into the segment mold 102 obtained in S1, then install the embedded parts, and then install the arc mandrel coated with release agent;

[0057] S4 concrete pouring and vibration, the mold walking unit 101 first transports the segment mold 102 obtained in S2 to the bottom of the concrete pouring unit 103, and the lifting device 3 then drives the cover plate 4 to descend and cover the segment mold 102, the pneumatic clamping device 5 clamps the segment mold 102, and then concrete is poured through the concrete pouring unit 103, and at the same time, the three groups of longitudinal vibrators and transverse vibrators provided by the segment mold 102 are started in batches. These longitudinal vibrators and transverse vibrators are evenly distributed along the length direction of the segment mold 102; when the concrete pouring unit 103 is unloading, the concrete unloading speed is controlled to 0.06m³ / s, and the transverse vibrator is turned on until the top surface of the concrete is 5cm away from the bottom surface of the cover plate 4, then the transverse vibrator is turned off, and the longitudinal vibrator is turned on until the remaining concrete is poured, and then the two outermost longitudinal vibrators of the segment mold 102 are turned off, and the vibration is continued for 3min;

[0058] S5 Concrete forming and finishing: After vibrating and forming, the lifting device 3 first causes the cover plate 4 to rise and separate from the segment mold 102. The flip adaptive device drives the rough trowel 7 to rotate and contact the curved top surface of the segment mold 102. The mold moving unit 101 continues to transport the segment mold 102. The rough trowel 7 scrapes off excess concrete during the movement of the segment mold 102. After the concrete on the segment mold 102 absorbs water, a steel trowel is used to perform medium and fine finishing, controlling the flatness error of the outer curved surface of the segment to be less than ±2.0 mm. During the medium and fine finishing process and before the initial setting of the concrete, the curved core rod is removed.

[0059] S6: Steam curing of the segment. After the vibration is completed, it is left to stand at room temperature for 3 hours. The mold moving unit 101 first transports the segment mold 102 obtained in S5 to the curing kiln 104. The curing temperature is raised to 15°C / h, kept at this temperature for 2 hours, and then lowered to room temperature at 10°C / h.

[0060] S7 Segment demoulding: When the strength of the segment on the segment mold 102 reaches 40%, the segment is demoulded. The segment demoulding unit 105 uses a vacuum suction cup hoist to lift the segment and uses a flip frame to flip the segment to obtain the segment.

[0061] In the step of pouring and vibrating concrete, the concrete is composed of the following raw materials in parts by weight: 410 parts of cement, 160 parts of silica fume, 600 parts of machine-made sand, 830 parts of crushed stone with a particle size of 5 to 25 mm, 130 parts of copper-plated steel fiber with a length of 11 to 15 mm, 5 parts of sodium calcium phosphosilicate, 8 parts of styrene-methyl methacrylate resin, 5 parts of microcrystalline cellulose, 11 parts of a water reducer obtained by modifying polycarboxylic acid molecules with β-cyclodextrin, and 140 parts of water. In manufactured sand, the weight ratio of particles with a particle size greater than 4.75 mm is 1%, the weight ratio of particles with a particle size of 4.75-2.36 mm is 10%, the weight ratio of particles with a particle size of 2.36-1.18 mm is 20%, the weight ratio of particles with a particle size of 1.18-0.60 mm is 20%, the weight ratio of particles with a particle size of 0.60-0.30 mm is 22%, the weight ratio of particles with a particle size of 0.30-0.15 mm is 10%, and the weight ratio of particles with a particle size of less than 0.15 mm is 5%.

[0062] Among them, the chloride ion penetration depth of the prepared pipe segment is 2mm, the water seepage depth is 4.5mm, the carbonization depth is 0.7mm, the 7d compressive strength is 62MPa, and the 28d compressive strength is 85MPa.

[0063] Example 7: A prefabrication production process for a high-strength concrete lining segment disclosed in the present invention is different from Example 2 in that it includes the following steps:

[0064] S1: Assemble the segment mold 102. First, clean the concrete residue on the inner and outer periphery and bottom of the segment mold 102. Then assemble the segment mold 102 and evenly apply a release agent on the inner surface of the segment mold 102. After assembly is completed, test the accuracy of the segment mold 102.

[0065] S2: Installation of steel skeleton and embedded parts: First, hoist the steel skeleton into the segment mold 102 obtained in S1, then install the embedded parts, and then install the arc mandrel coated with release agent;

[0066] S4 concrete pouring and vibration, the mold walking unit 101 first transports the segment mold 102 obtained in S2 to the bottom of the concrete pouring unit 103, and the lifting device 3 then drives the cover plate 4 to descend and cover the segment mold 102, the pneumatic clamping device 5 clamps the segment mold 102, and then pours concrete through the concrete pouring unit 103, and at the same time starts the three groups of longitudinal vibrators and transverse vibrators of the segment mold 102 in batches. These longitudinal vibrators and transverse vibrators are evenly distributed along the length direction of the segment mold 102; when the concrete pouring unit 103 unloads, the concrete unloading speed is controlled to 0.07m³ / s, and the transverse vibrator is turned on until the top surface of the concrete is 6cm away from the bottom surface of the cover plate 4, then the transverse vibrator is turned off, and the longitudinal vibrator is turned on until the remaining concrete is poured, and then the two outermost longitudinal vibrators of the segment mold 102 are turned off, and the vibration is continued for 4 minutes;

[0067] S5 Concrete forming and finishing: After vibrating and forming, the lifting device 3 first causes the cover plate 4 to rise and separate from the segment mold 102. The flip adaptive device drives the rough trowel 7 to rotate and contact the curved top surface of the segment mold 102. The mold moving unit 101 continues to transport the segment mold 102. The rough trowel 7 scrapes off excess concrete during the movement of the segment mold 102. After the concrete on the segment mold 102 absorbs water, a steel trowel is used to perform medium and fine finishing, controlling the flatness error of the outer curved surface of the segment to be less than ±2.0 mm. During the medium and fine finishing process and before the initial setting of the concrete, the curved core rod is removed.

[0068] S6: Steam curing of the segment. After the vibration is completed, it is left at room temperature for 4 hours. The mold moving unit 101 first transports the segment mold 102 obtained in S5 to the curing kiln 104. The curing temperature is raised to 18°C / h, kept at this temperature for 2 hours, and then lowered to room temperature at 12°C / h.

[0069] S7 Segment demoulding: When the strength of the segment on the segment mold 102 reaches 40%, the segment is demoulded. The segment demoulding unit 105 uses a vacuum suction cup hoist to lift the segment and uses a flip frame to flip the segment to obtain the segment.

[0070] In the step of pouring and vibrating concrete, the concrete is composed of the following raw materials in parts by weight: 420 parts of cement, 180 parts of silica fume, 620 parts of machine-made sand, 825 parts of crushed stone with a particle size of 5 to 25 mm, 140 parts of copper-plated steel fiber with a length of 11 to 15 mm, 5 parts of sodium calcium phosphosilicate, 7 parts of styrene-methyl methacrylate resin, 4 parts of microcrystalline cellulose, 10 parts of a water reducer obtained by modifying polycarboxylic acid molecules with β-cyclodextrin, and 145 parts of water. In manufactured sand, the weight ratio of particles with a particle size greater than 4.75 mm is 3%, the weight ratio of particles with a particle size of 4.75-2.36 mm is 15%, the weight ratio of particles with a particle size of 2.36-1.18 mm is 25%, the weight ratio of particles with a particle size of 1.18-0.60 mm is 25%, the weight ratio of particles with a particle size of 0.60-0.30 mm is 28%, the weight ratio of particles with a particle size of 0.30-0.15 mm is 5%, and the weight ratio of particles with a particle size less than 0.15 mm is 0%.

[0071] Among them, the chloride ion penetration depth of the prepared pipe segment is 2.5mm, the water seepage depth is 5mm, the carbonization depth is 0.7mm, the 7d compressive strength is 61MPa, and the 28d compressive strength is 83MPa.

[0072] Example 8: A prefabrication production process for a high-strength concrete lining segment disclosed in the present invention is different from Example 2 in that it includes the following steps:

[0073] S1: Assemble the segment mold 102. First, clean the concrete residue on the inner and outer periphery and bottom of the segment mold 102. Then assemble the segment mold 102 and evenly apply a release agent on the inner surface of the segment mold 102. After assembly is completed, test the accuracy of the segment mold 102.

[0074] S2: Installation of steel skeleton and embedded parts: First, hoist the steel skeleton into the segment mold 102 obtained in S1, then install the embedded parts, and then install the arc mandrel coated with release agent;

[0075] S4 concrete pouring and vibration, the mold walking unit 101 first transports the segment mold 102 obtained in S2 to the bottom of the concrete pouring unit 103, and the lifting device 3 then drives the cover plate 4 to descend and cover the segment mold 102, the pneumatic clamping device 5 clamps the segment mold 102, and then pours concrete through the concrete pouring unit 103, and at the same time starts the three groups of longitudinal vibrators and transverse vibrators of the segment mold 102 in batches. These longitudinal vibrators and transverse vibrators are evenly distributed along the length direction of the segment mold 102; when the concrete pouring unit 103 unloads, the concrete unloading speed is controlled to 0.08m³ / s, and the transverse vibrator is turned on until the top surface of the concrete is 8cm away from the bottom surface of the cover plate 4, then the transverse vibrator is turned off, and the longitudinal vibrator is turned on until the remaining concrete is poured, and then the two outermost longitudinal vibrators of the segment mold 102 are turned off, and the vibration is continued for 2 minutes;

[0076] S5 Concrete forming and finishing: After vibrating and forming, the lifting device 3 first causes the cover plate 4 to rise and separate from the segment mold 102. The flip adaptive device drives the rough trowel 7 to rotate and contact the curved top surface of the segment mold 102. The mold moving unit 101 continues to transport the segment mold 102. The rough trowel 7 scrapes off excess concrete during the movement of the segment mold 102. After the concrete on the segment mold 102 absorbs water, a steel trowel is used to perform medium and fine finishing, controlling the flatness error of the outer curved surface of the segment to be less than ±2.0 mm. During the medium and fine finishing process and before the initial setting of the concrete, the curved core rod is removed.

[0077] S6: Steam curing of the segment. After the vibration is completed, it is left to stand at room temperature for 3.5 hours. The mold moving unit 101 first transports the segment mold 102 obtained in S5 to the curing kiln 104. The curing temperature is raised to ℃ at a rate of 20℃ / h, kept at this temperature for 2 hours, and then lowered to room temperature at a rate of 14℃ / h.

[0078] S7 Segment demoulding: When the strength of the segment on the segment mold 102 reaches 40%, the segment is demoulded. The segment demoulding unit 105 uses a vacuum suction cup hoist to lift the segment and uses a flip frame to flip the segment to obtain the segment.

[0079] In the step of pouring and vibrating concrete, the concrete is composed of the following raw materials in parts by weight: 415 parts of cement, 170 parts of silica fume, 630 parts of machine-made sand, 845 parts of crushed stone with a particle size of 5 to 25 mm, 136 parts of copper-plated steel fiber with a length of 11 to 15 mm, 5 parts of sodium calcium phosphosilicate, 7 parts of styrene-methyl methacrylate resin, 6 parts of microcrystalline cellulose, 12 parts of a water reducer obtained by modifying polycarboxylic acid molecules with β-cyclodextrin, and 150 parts of water. In manufactured sand, the weight ratio of particles with a particle size greater than 4.75 mm is 5%, the weight ratio of particles with a particle size of 4.75-2.36 mm is 20%, the weight ratio of particles with a particle size of 2.36-1.18 mm is 10%, the weight ratio of particles with a particle size of 1.18-0.60 mm is 31%, the weight ratio of particles with a particle size of 0.60-0.30 mm is 20%, the weight ratio of particles with a particle size of 0.30-0.15 mm is 12%, and the weight ratio of particles with a particle size of less than 0.15 mm is 10%.

[0080] Among them, the chloride ion penetration depth of the prepared pipe segment is 3mm, the water seepage depth is 5.5mm, the carbonization depth is 0.7mm, the 7d compressive strength is 58MPa, and the 28d compressive strength is 84MPa.

[0081] Example 9: A prefabrication production process for a high-strength concrete lining segment disclosed in the present invention is different from Example 2 in that it includes the following steps:

[0082] S1: Assemble the segment mold 102. First, clean the concrete residue on the inner and outer periphery and bottom of the segment mold 102. Then assemble the segment mold 102 and evenly apply a release agent on the inner surface of the segment mold 102. After assembly is completed, test the accuracy of the segment mold 102.

[0083] S2: Installation of steel skeleton and embedded parts: First, hoist the steel skeleton into the segment mold 102 obtained in S1, then install the embedded parts, and then install the arc mandrel coated with release agent;

[0084] S4 concrete pouring and vibration, the mold walking unit 101 first transports the segment mold 102 obtained in S2 to the bottom of the concrete pouring unit 103, and the lifting device 3 then drives the cover plate 4 to descend and cover the segment mold 102, the pneumatic clamping device 5 clamps the segment mold 102, and then pours concrete through the concrete pouring unit 103, and at the same time starts the three groups of longitudinal vibrators and transverse vibrators of the segment mold 102 in batches. These longitudinal vibrators and transverse vibrators are evenly distributed along the length direction of the segment mold 102; when the concrete pouring unit 103 unloads, the concrete unloading speed is controlled to 0.07m³ / s, and the transverse vibrator is turned on until the top surface of the concrete is 4cm away from the bottom surface of the cover plate 4, then the transverse vibrator is turned off, and the longitudinal vibrator is turned on until the remaining concrete is poured, and then the two outermost longitudinal vibrators of the segment mold 102 are turned off, and the vibration is continued for 3 minutes;

[0085] S5 Concrete forming and finishing: After vibrating and forming, the lifting device 3 first causes the cover plate 4 to rise and separate from the segment mold 102. The flip adaptive device drives the rough trowel 7 to rotate and contact the curved top surface of the segment mold 102. The mold moving unit 101 continues to transport the segment mold 102. The rough trowel 7 scrapes off excess concrete during the movement of the segment mold 102. After the concrete on the segment mold 102 absorbs water, a steel trowel is used to perform medium and fine finishing, controlling the flatness error of the outer curved surface of the segment to be less than ±2.0 mm. During the medium and fine finishing process and before the initial setting of the concrete, the curved core rod is removed.

[0086] S6: Steam curing of the segment. After the vibration is completed, it is left at room temperature for 4 hours. The mold moving unit 101 first transports the segment mold 102 obtained in S5 to the curing kiln 104. The curing temperature is raised to 16°C / h, kept at this temperature for 2 hours, and then lowered to room temperature at 13°C / h.

[0087] S7 Segment demoulding: When the strength of the segment on the segment mold 102 reaches 40%, the segment is demoulded. The segment demoulding unit 105 uses a vacuum suction cup hoist to lift the segment and uses a flip frame to flip the segment to obtain the segment.

[0088] In the step of pouring and vibrating concrete, the concrete is composed of the following raw materials in parts by weight: 410 parts of cement, 150 parts of silica fume, 650 parts of machine-made sand, 800 parts of crushed stone with a particle size of 5 to 25 mm, 132 parts of copper-plated steel fiber with a length of 11 to 15 mm, 6 parts of sodium calcium phosphosilicate, 6 parts of styrene-methyl methacrylate resin, 5 parts of microcrystalline cellulose, 9 parts of a water reducer obtained by modifying polycarboxylic acid molecules with β-cyclodextrin, and 143 parts of water. In the manufactured sand, the weight ratio of particles with a particle size greater than 4.75 mm is 4%, the weight ratio of particles with a particle size of 4.75-2.36 mm is 5%, the weight ratio of particles with a particle size of 2.36-1.18 mm is 15%, the weight ratio of particles with a particle size of 1.18-0.60 mm is 23%, the weight ratio of particles with a particle size of 0.60-0.30 mm is 25%, the weight ratio of particles with a particle size of 0.30-0.15 mm is 14%, and the weight ratio of particles with a particle size of less than 0.15 mm is 8%.

[0089] Among them, the chloride ion penetration depth of the prepared pipe segment is 2.4mm, the water seepage depth is 4.8mm, the carbonization depth is 0.6mm, the 7d compressive strength is 59MPa, and the 28d compressive strength is 85MPa.

[0090] Example 10: A prefabrication production process for a high-strength concrete lining segment disclosed in the present invention, which differs from Example 2 in that it includes the following steps:

[0091] S1: Assemble the segment mold 102. First, clean the concrete residue on the inner and outer periphery and bottom of the segment mold 102. Then assemble the segment mold 102 and evenly apply a release agent on the inner surface of the segment mold 102. After assembly is completed, test the accuracy of the segment mold 102.

[0092] S2: Installation of steel skeleton and embedded parts: First, hoist the steel skeleton into the segment mold 102 obtained in S1, then install the embedded parts, and then install the arc mandrel coated with release agent;

[0093] S4 concrete pouring and vibration, the mold walking unit 101 first transports the segment mold 102 obtained in S2 to the bottom of the concrete pouring unit 103, and the lifting device 3 then drives the cover plate 4 to descend and cover the segment mold 102, the pneumatic clamping device 5 clamps the segment mold 102, and then concrete is poured through the concrete pouring unit 103, and at the same time, the three groups of longitudinal vibrators and transverse vibrators provided with the segment mold 102 are started in batches. These longitudinal vibrators and transverse vibrators are evenly distributed along the length direction of the segment mold 102; when the concrete pouring unit 103 is unloading, the concrete unloading speed is controlled to 0.07m³ / s, and the transverse vibrator is turned on until the top surface of the concrete is 7cm away from the bottom surface of the cover plate 4, then the transverse vibrator is turned off, and the longitudinal vibrator is turned on until the remaining concrete is poured, and then the two outermost longitudinal vibrators of the segment mold 102 are turned off, and the vibration is continued for 3min;

[0094] S5 Concrete forming and finishing: After vibrating and forming, the lifting device 3 first causes the cover plate 4 to rise and separate from the segment mold 102. The flip adaptive device drives the rough trowel 7 to rotate and contact the curved top surface of the segment mold 102. The mold moving unit 101 continues to transport the segment mold 102. The rough trowel 7 scrapes off excess concrete during the movement of the segment mold 102. After the concrete on the segment mold 102 absorbs water, a steel trowel is used to perform medium and fine finishing, controlling the flatness error of the outer curved surface of the segment to be less than ±2.0 mm. During the medium and fine finishing process and before the initial setting of the concrete, the curved core rod is removed.

[0095] S6: Steam curing of the segment. After the vibration is completed, it is left to stand at room temperature for 3 hours. The mold moving unit 101 first transports the segment mold 102 obtained in S5 to the curing kiln 104. The curing temperature is raised to 17°C / h, kept at this temperature for 2 hours, and then lowered to room temperature at 10°C / h.

[0096] S7 Segment demoulding: When the strength of the segment on the segment mold 102 reaches 40%, the segment is demoulded. The segment demoulding unit 105 uses a vacuum suction cup hoist to lift the segment and uses a flip frame to flip the segment to obtain the segment.

[0097] In the step of pouring and vibrating concrete, the concrete is composed of the following raw materials in parts by weight: 405 parts of cement, 165 parts of silica fume, 640 parts of machine-made sand, 850 parts of crushed stone with a particle size of 5 to 25 mm, 138 parts of copper-plated steel fiber with a length of 11 to 15 mm, 4 parts of sodium calcium phosphosilicate, 7 parts of styrene-methyl methacrylate resin, 5 parts of microcrystalline cellulose, 8 parts of a water reducer obtained by modifying polycarboxylic acid molecules with β-cyclodextrin, and 148 parts of water. In the manufactured sand, the weight ratio of particles with a particle size greater than 4.75 mm is 0%, the weight ratio of particles with a particle size of 4.75-2.36 mm is 13%, the weight ratio of particles with a particle size of 2.36-1.18 mm is 30%, the weight ratio of particles with a particle size of 1.18-0.60 mm is 28%, the weight ratio of particles with a particle size of 0.60-0.30 mm is 30%, the weight ratio of particles with a particle size of 0.30-0.15 mm is 15%, and the weight ratio of particles with a particle size of less than 0.15 mm is 15%.

[0098] Among them, the chloride ion penetration depth of the prepared pipe segment is 2.8mm, the water seepage depth is 5.3mm, the carbonization depth is 0.8mm, the 7d compressive strength is 62MPa, and the 28d compressive strength is 84MPa.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A prefabrication production line for high-strength concrete lining segments, comprising a mold traveling unit (101), a plurality of segment molds (102) slidably mounted on the mold traveling unit (101), and a concrete pouring unit (103), a curing kiln (104), and a segment demoulding unit (105) sequentially arranged on a traveling path of the segment molds (102), characterized in that: The concrete pouring unit (103) comprises a feeding device (2), a lifting device (3), a cover plate (4) with a pouring port (41), a pneumatic clamping device (5) and an adaptive turning device (6) arranged on the cover plate (4), and a roughing plate (7) arranged at the output end of the adaptive turning device (6); the cover plate (4) is installed at the output end of the lifting device (3) in a manner such that the pouring port (41) faces the discharge port of the feeding device (2); the clamping end of the pneumatic clamping device (5) selectively contacts the two side surfaces of the pipe segment mold (102); and the turning path of the roughing plate (7) passes through the downstream end of the cover plate (4) and the arc-shaped top surface of the pipe segment mold (102) in sequence; The pneumatic clamping device (5) is provided with a plurality of pneumatic clamping devices (5) and arranged in parallel along the length direction of the cover plate (4). The pneumatic clamping device (5) includes a spring airbag (51) located in the center, and a crossbar (52), a vertical slide (53), an elastic hinge bracket (54) and a fastening hook (55) symmetrically arranged on both sides of the spring airbag (51). One end of the crossbar (52) is provided on the spring airbag (51), and the other end passes through the vertical slide (53) and is hinged to the fastening hook (55). The fastening hook (55) is slidably connected to the hinged end of the elastic hinge bracket (54) at a section close to the crossbar (52); The adaptive flipping device (6) comprises a controller (61), a flange frame (62), a flipping motor (63) arranged on the flange frame (62), a flipping shaft (65) rotatably connected to the flange frame (62) and connected to the output shaft of the flipping motor (63) through a transmission member (64), a supporting plate (66) arranged on the flipping shaft (65), a pressure sensor (67) arranged on the supporting plate (66), and an adaptive adjusting member (68) and a first elastic member (69) arranged on the rough wiping plate (7). The controller (61) is electrically connected to the lifting device (3), the pressure sensor (67) and the adaptive adjusting member (68). The detection end of the pressure sensor (67) contacts the moving end of the adaptive adjusting member (68). The end of the first elastic member (69) is fixed to the supporting plate (66).

2. The prefabrication production line for high-strength concrete lining segments according to claim 1, characterized in that: The lifting device (3) comprises a truss (31) straddling the mold walking unit (101), a proximity switch (32) and a plurality of lifting cylinders (33) arranged on the truss (31), and a hanging chain (34) arranged between the piston rod of the lifting cylinder (33) and the cover plate (4); the proximity switch (32) is electrically connected to the lifting cylinder (33), the pneumatic clamping device (5) and the pipe segment walking unit; and the sensing end of the proximity switch (32) faces the downstream end of the pipe segment mold (102) below the feeding device (2).

3. The prefabrication production line for high-strength concrete lining segments according to claim 1, characterized in that: The elastic hinge bracket (54) includes a pair of support plates (541) arranged on the cover plate (4), a hinge shaft (542) rotatably connected to the pair of support plates (541), a slider (543) arranged on the hinge shaft (542), and a torsion spring (544) arranged between the pair of support plates (541) and sleeved on the hinge shaft (542). The two side surfaces of the fastening hook (55) are in sliding contact with the surfaces of the pair of support plates (541) respectively, and the fastening hook (55) is provided with a sliding groove that is slidably matched with the slider (543).

4. The prefabrication production line for high-strength concrete lining segments according to claim 1, characterized in that: The adaptive adjustment member (68) includes a second elastic member (682) with a reader (681) that is slidably sleeved from the inside to the outside, a sleeve (684) with a magnetic scale (683), and a first linear bearing (685) arranged on the rough wiping plate (7). The sleeve (684) is sleeved outside the pressure sensor (67) and fixed on the support plate (66). One end of the second elastic member (682) close to the reader (681) contacts the detection end of the pressure sensor (67), and the other end is fixed on the rough wiping plate (7). The reader (681) contacts the magnetic scale (683), and the magnetic scale (683) is electrically connected to the controller (61).

5. The prefabrication production line for high-strength concrete lining segments according to claim 4, characterized in that: The second elastic member (682) includes a fixed plate (6821) fixed on the rough wiping plate (7), a second linear bearing (6822) arranged on the fixed plate (6821), a positioning sleeve (6823) slidably inserted into the second linear bearing (6822), an abutment plate (6824) arranged on the positioning sleeve (6823) and abutting against the detection end of the pressure sensor (67), and a compression spring (6825) arranged in the positioning sleeve (6823), the reading head (681) is arranged on the abutment plate (6824), and the two ends of the compression spring (6825) are respectively fixed on the fixed plate (6821) and the abutment plate (6824).

6. A prefabrication production process for high-strength concrete lining segments, characterized by: The method comprises the steps of assembling the segment mold (102), installing the steel skeleton and embedded parts, pouring and vibrating the concrete, forming and finishing the concrete, steam curing the segment, and demoulding the segment using the prefabrication production line according to any one of claims 1 to 5.

7. The prefabrication production process of high-strength concrete lining segments according to claim 6, characterized in that: In the concrete pouring and vibrating step, a plurality of groups of longitudinal vibrators and transverse vibrators are provided on the segment mold (102), and these longitudinal vibrators and transverse vibrators are evenly distributed along the length direction of the segment mold (102); when the concrete pouring unit (103) is unloading, the concrete unloading speed is controlled to be 0.06-0.08 m³ / s, and the transverse vibrator is turned on until the top surface of the concrete is 4-8 cm away from the bottom surface of the cover plate (4), then the transverse vibrator is turned off, and the longitudinal vibrator is turned on until the remaining concrete is poured, and then the two outermost longitudinal vibrators of the segment mold (102) are turned off, and the vibration is continued for 2-4 minutes.

8. The prefabrication production process of high-strength concrete lining segments according to claim 6, characterized in that: In the step of pouring and vibrating the concrete, the concrete is composed of the following raw materials in parts by weight: 400-420 parts of cement, 150-180 parts of silica fume, 600-650 parts of machine-made sand, 800-850 parts of crushed stone with a particle size of 5-25 mm, 130-140 parts of copper-plated steel fiber with a length of 11-15 mm, 4-6 parts of sodium calcium phosphosilicate, 6-8 parts of styrene-methyl methacrylate resin, 4-6 parts of microcrystalline cellulose, 8-12 parts of a water reducer obtained by modifying polycarboxylic acid molecules with β-cyclodextrin, and 140-150 parts of water.

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