A vault continuous casting trolley and construction method thereof

Abstract

The present invention discloses a vault continuous casting trolley, comprising a gantry system, a formwork system and a vault continuous casting system. The formwork system is mounted on the gantry system, and the vault continuous casting system can be slidably mounted on the gantry system. The formwork system is provided with a slot arranged along the length direction of the tunnel at the vault position, and the slot is provided with a movable module that can selectively close or open a certain section of the slot. The movable module cooperates with the vault continuous casting system to achieve continuous casting of the vault. The present invention also provides a construction method for continuous casting of the secondary lining of the tunnel using the above-mentioned vault continuous casting trolley. The vault continuous casting trolley and construction method of the present invention can achieve continuous casting of the top of the tunnel secondary lining by reserving a pumping slot at the vault position and cooperating with the movable module, thereby eliminating the defects of hollowing or loose concrete in the vault portion that are prone to occur in ordinary casting methods and improving the quality of the tunnel secondary lining.

Description

Technical Field

[0001] The present invention belongs to the field of tunnel construction, and in particular relates to a trolley and a construction method thereof. Background Art

[0002] Currently, secondary lining trolleys used in tunnel construction employ a sequential pumping method with multiple pumping ports for vault pouring. A commonly used 12m trolley typically has four pumping ports, with spacing of 3m or greater between them. The sudden increase in area after concrete is pumped out of the ports causes a sudden drop in pumping pressure. Furthermore, most secondary lining concrete is reinforced, and the presence of rebar creates significant resistance to concrete flow. Consequently, this vault pouring method can easily result in loose concrete, even voids, and lining quality defects. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings and defects mentioned in the above background technology and provide a vault continuous casting trolley and construction method thereof that can eliminate the quality defects of loose and voided vault concrete during lining construction. To solve the above technical problems, the technical solutions proposed by the present invention are as follows:

[0004] A vault continuous casting trolley comprises a gantry system, a formwork system, and a vault continuous casting system. The formwork system is mounted on the gantry system, and the vault continuous casting system is slidably mounted on the gantry system. The formwork system has a slot at the vault position that is arranged along the length of the tunnel. The slot is provided with a movable module that can selectively close or open a certain section of the slot. The movable module cooperates with the vault continuous casting system to achieve continuous vault casting. The selective closing or opening means that when casting is required for a certain section, the slot is opened and can be closed after casting of the section is completed.

[0005] In the above-mentioned vault continuous casting trolley, preferably, the formwork system includes side forms, side arch forms, and a top arch form, all arranged along the length of the tunnel, the side forms being arranged below the side arch forms, the side forms and side arch forms being symmetrically arranged on both sides of the top arch form, and the top arch form being fixed to both ends of the top of the side arch forms so as to form a notch between the side arch forms on both sides. The ends of the top arch form are flush with the ends of the side arch forms.

[0006] In the above-mentioned vault continuous casting trolley, preferably, the top vault mold includes a first vault mold with a pumping port and a second vault mold without a pumping port, the first vault mold and the second vault mold being located at opposite ends of the top of the side vault mold, respectively. Providing the first vault mold with a pumping port facilitates casting above the first vault mold after the notch is completely closed.

[0007] In the above-mentioned vault continuous casting trolley, preferably, the slot is provided with a plurality of transverse links for connecting the two side arch molds, and the two ends of the transverse links are fixed to the lower ends of the two side arch molds by a first bolt system. The transverse links can improve the connection stability of the two side arch molds.

[0008] In the above-mentioned arch continuous casting trolley, preferably, a lower connecting seat is fixedly provided at the lower position of the side arch mold, and the lower connecting seat is fixedly connected to the upper longitudinal beam of the portal system through a second bolt system; a middle connecting seat is fixedly provided at the middle position of the side arch mold, and the middle connecting seat is fixed to the portal system through a supporting truss, and the middle connecting seat is fixed to the supporting truss through a third bolt system.

[0009] In the above-mentioned vault continuous casting trolley, preferably, the movable module includes a plurality of movable top arches, the upper surface of the movable top arches is flush with the upper surface of the formwork system, and the movable top arches can be slidably arranged in the grooves when not fixed.

[0010] In the above-mentioned vault continuous casting trolley, preferably, the notch is provided with sliding plates on both sides in the length direction, the top surface of the sliding plates does not exceed the notch, the movable top arch is π-shaped, including an upper panel and a lower connecting plate, the width of the upper panel (referring to the tunnel width direction) matches the width of the notch (referring to the tunnel width direction), the lower connecting plate is set close to the end faces of the side arch molds on both sides, and the movable top arch can slide on the sliding plates through the upper panel when it is not fixed. After the movable top arch reaches the specified position, it can be fixedly connected to the two sides of the side arch mold through the lower connecting plate by a fourth bolt system.

[0011] In the present invention, the provision of a sliding strip allows the movable top arch to slide within the notch. Once slid to the designated position, the fourth bolt system secures the movable top arch to the side arch molds, reducing the workload of sealing the notch during segmented casting. The sliding strip is not required on the side of the notch near the first top arch mold to facilitate closing the final segment of the notch.

[0012] In the above-mentioned vault continuous casting trolley, preferably, the vault continuous casting system includes a track, a casting vehicle, a pumping pipe assembly, a hydraulic assembly for adjusting the position of the pumping pipe assembly, and an electrical system for controlling the casting vehicle and the hydraulic assembly. The track is arranged on the upper surface of the crossbeam of the gantry system along the length direction of the tunnel, and the casting vehicle is movably arranged on the track.

[0013] As a general technical concept, the present invention also provides a construction method for continuously pouring the secondary lining of a tunnel using the above-mentioned vault continuous pouring trolley, comprising the following steps:

[0014] S1: Move the vault continuous casting system to the tunnel construction position, set multiple slidable movable vaults in the slot, and adjust the position of the movable vaults so that a grouting opening is opened on the side of the slot close to the second vault mold without a pumping interface (generally, the distance can be an integer multiple of the length of the movable vault);

[0015] S2: Adjust the position of the vault continuous pouring system so that the pumping pipe assembly extends from the above-mentioned grouting opening into the upper part near one end of the second top arch mold to perform grouting. After the pouring is completed, move a movable top arch near the grouting opening to the grouting opening, and fix the movable top arch to the side arch mold (using a fourth bolt system) to block the last grouting location, while moving the grouting opening away from the second top arch mold.

[0016] S3: Repeat the above step S2 until the grouting opening moves close to the first top arch mold;

[0017] S4: Install a movable top arch at the grouting opening and seal the grouting opening. Adjust the position of the arch top continuous casting system so that the outlet of the pumping pipe assembly is connected to the pumping interface of the first top arch mold. Then grout the remaining uncast part to complete the continuous casting of the tunnel secondary lining.

[0018] In the above construction method, preferably, the length of the notch along the tunnel length direction is an integral multiple of the length of the movable top arch, the width of the notch is 300-350 mm, the length of the movable top arch along the tunnel length direction is 450-550 mm, and the length of the first and second top arch molds along the tunnel length direction is 1000-2000 mm. More preferably, the length of the notch along the tunnel length direction is an integral multiple of the length of the movable top arch, the width of the notch is 350 mm, the length of the movable top arch along the tunnel length direction is 500 mm, and the length of the first top arch mold along the tunnel length direction is 2000 mm.

[0019] In the above construction method, first, a grouting opening is reserved near the second top arch mold, and then grouting is performed. After the first pouring is completed, the movable top arch is moved to seal the last grouting location, and the grouting opening is moved in the direction close to the first top arch mold. Then, the position of the arch continuous pouring system is moved (the moving distance is controlled to be the length of a movable top arch). The above grouting and moving operations of the movable top arch are repeated until only the length of a movable top arch is left above the slot. Then, a movable top arch is installed at this location and fixed to the side arch mold. Finally, the outlet of the pumping pipe assembly is connected to the pumping interface of the first top arch mold, and pressure pumping is performed above the last first top arch mold of the trolley to complete the grouting. The continuous pouring process of the present invention can continuously pour the arch in sections for multiple times, and the quality of the arch pouring can be visually observed. Compared with the prior art of pouring in sections of 3m, the present invention can achieve pouring in sections of 500mm, which can greatly eliminate the quality defects of the arch concrete pouring such as looseness and voids during lining construction.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] 1. The vault continuous casting trolley and construction method of the present invention can realize continuous casting of the top of the tunnel secondary lining by reserving pumping slots at the vault position and cooperating with the movable module. This can eliminate the defects of hollowing or loose concrete in the vault part that are prone to occur in ordinary casting methods, further improve the existing lining technology level, and enhance the quality of the tunnel secondary lining.

[0022] 2. The vault continuous casting trolley of the present invention has a simple structure. During the actual construction, the movable module can be moved, the labor intensity is low, the casting work is easy to carry out, and the construction is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is the structural front view of the vault continuous casting trolley of Example 1.

[0025] Figure 2 This is a top view of the structure of the vault continuous casting trolley in Example 1.

[0026] Figure 3 This is a schematic structural diagram of the template system in Example 1 (the side templates are not shown in the figure).

[0027] Figure 4 This is a structural diagram of the movable top arch in Example 1.

[0028] Figure 5 This is a schematic diagram of the installation structure of the sliding plate at the notch in Example 1.

[0029] Figure 6 Schematic diagram of the structure of the vault continuous casting system in Example 1.

[0030] Figure 7 Schematic diagram of the structure of the support truss in Example 1.

[0031] Figure 8 This is a schematic diagram of the process of continuous casting of the vault in Example 1.

[0032] Figure 9 This is a first axonometric schematic diagram of the vault continuous casting system in Example 2.

[0033] Figure 10 This is an axonometric diagram of the trolley in Example 2.

[0034] Figure 11 This is an axonometric diagram of the coordination of the pumping pipe assembly and the concrete distribution hopper in Example 2.

[0035] Figure 12 This is a first axonometric schematic diagram of the concrete distribution hopper in Example 2 (with the string tube hidden).

[0036] Figure 13 This is the first axonometric schematic diagram of the string tube in Example 2.

[0037] Figure 14 This is a second axonometric schematic diagram of the concrete distribution hopper in Example 2 (with the string tube hidden).

[0038] Figure 15 This is an axonometric diagram of the partition rotating mechanism in Example 2.

[0039] The legend in Example 1:

[0040] 100. Gantry system; 101. Upper longitudinal beam; 102. Support truss;

[0041] 200, formwork system; 201, side formwork; 202, side arch formwork; 2021, lower connecting seat; 2022, middle connecting seat; 203, top arch formwork; 2031, first top arch formwork; 2032, second top arch formwork; 204, notch; 2041, slide plate; 205, cross connection; 206, pumping interface;

[0042] 300. Vault continuous casting system; 301. Track; 302. Casting vehicle; 303. Pumping pipe assembly; 304. Hydraulic assembly; 305. Electrical system;

[0043] 400, movable top arch; 401, upper panel; 402, lower connecting plate.

[0044] The legend in Example 2:

[0045] 1. Trolley; 11. Hydraulic motor; 12. Speed reducer; 13. Cylinder and hopper support; 14. Support hinge plate; 15. Mounting frame; 16. Travel roller; 17. Guide roller;

[0046] 2. Pumping pipe assembly; 21. Straight pipe; 22. Clamp; 23. Bend; 24. Hoop seat; 25. Output elbow; 26. Rotating elbow; 27. Transition support steel pipe;

[0047] 3. Electronic control system;

[0048] 4. Concrete distribution hopper; 41. Hopper; 42. Partition; 43. Partition rotation mechanism; 44. Discharge pipe; 45. Feed port; 46. Rotating shaft; 47. Rocker handle; 48. Distribution plate; 49. Spring clip; 410. Connecting plate; 411. Positioning hole; 413. Outlet pipe; 414. String tube; 415. Attachment column; 416. L-shaped notch; 417. Cover plate;

[0049] 5. Direction adjustment device; 51. Hydraulic pump station; 52. Hydraulic cylinder; 53. Protective cover;

[0050] 6. Rail track; 61. Rack; 62. Track channel steel; 63. Horizontal connecting channel steel. DETAILED DESCRIPTION

[0051] To facilitate understanding of the present invention, the present invention will be described in more comprehensive and detailed form below in conjunction with the accompanying drawings and preferred embodiments. However, the protection scope of the present invention is not limited to the following specific embodiments.

[0052] Unless otherwise defined, all technical terms used hereinafter have the same meanings as those generally understood by those skilled in the art. The technical terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0053] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0054] Example 1:

[0055] like Figure 1-Figure 7As shown, the vault continuous casting trolley of this embodiment includes a gantry system 100, a formwork system 200 and a vault continuous casting system 300. The formwork system 200 is mounted on the gantry system 100, and the vault continuous casting system 300 can be slidably mounted on the gantry system 100. The formwork system 200 is provided with a slot 204 arranged along the length direction of the tunnel at the vault position, and a movable module is provided at the slot 204 for selectively closing or opening a certain section of the slot 204. The movable module cooperates with the vault continuous casting system 300 to realize the continuous casting of the vault.

[0056] like Figure 2 As shown, in this embodiment, the formwork system 200 includes a side form 201, a side arch form 202 and a top arch form 203, all of which are arranged along the length direction of the tunnel. The side form 201 is arranged below the side arch form 202, and the side form 201 and the side arch form 202 are symmetrically arranged on both sides of the top arch form 203. The top arch form 203 is fixed at both ends of the top of the side arch form 202 to form a groove 204 between the side arch forms 202 on both sides.

[0057] In this embodiment, the top arch mold 203 includes a first top arch mold 2031 with a pumping interface 206 and a second top arch mold 2032 without a pumping interface 206 . The first top arch mold 2031 and the second top arch mold 2032 are respectively located at the top ends of the side arch mold 202 .

[0058] like Figure 3 As shown, in this embodiment, a plurality of transverse links 205 for connecting the two side arch molds 202 are provided in the slot 204 , and both ends of the transverse link 205 are fixed to the lower ends of the two side arch molds 202 by a first bolt system.

[0059] In this embodiment, a lower connecting seat 2021 is fixedly provided at the lower position of the side arch form 202, and the lower connecting seat 2021 is fixedly connected to the upper longitudinal beam 101 of the portal system 100 by a second bolt system; a middle connecting seat 2022 is fixedly provided at the middle position of the side arch form 202, and the middle connecting seat 2022 is fixed to the portal system 100 through a supporting truss 102, and the middle connecting seat 2022 is fixedly connected to the supporting truss 102 by a third bolt system.

[0060] In this embodiment, the movable module includes a plurality of movable top arches 400 . The upper surface of the movable top arch 400 is flush with the upper surface of the template system 200 . The movable top arch 400 can be slidably disposed in the slot 204 when not fixed.

[0061] like Figure 4 、 Figure 5As shown, in this embodiment, sliding plates 2041 are provided on both sides of the slot 204 in the length direction, and the top surface of the sliding plates 2041 does not exceed the slot 204. The movable top arch 400 is π-shaped, including an upper panel 401 and a lower connecting plate 402. The width of the upper panel 401 matches the width of the slot 204, and the lower connecting plate 402 is arranged close to the end faces of the side arch molds 202 on both sides. When the movable top arch 400 is not fixed, it can slide on the sliding plates 2041 through the upper panel 401. When fixed, the movable top arch 400 is fixed to the side arch mold 202 through the fourth bolt system.

[0062] like Figure 6 As shown, in this embodiment, the continuous vault casting system 300 includes a track 301, a casting vehicle 302, a pumping pipe assembly 303, a hydraulic assembly 304 for adjusting the position of the pumping pipe assembly 303, and an electrical system 305 for controlling the casting vehicle 302 and the hydraulic assembly 304. The track 301 is provided along the length of the tunnel on the upper surface of the crossbeam of the gantry system 100, and the casting vehicle 302 is movably mounted on the track 301. In this embodiment, the track 301, casting vehicle 302, pumping pipe assembly 303, hydraulic assembly 304, and electrical system 305 can all adopt casting systems in the prior art. By combining them with the basic structure of this embodiment, the casting quality of the tunnel secondary lining can be improved.

[0063] In this embodiment, the first bolt system, the second bolt system, the third bolt system and the third bolt system can all adopt existing conventional bolt assemblies.

[0064] like Figure 8 As shown, the construction method for continuously pouring the secondary lining of a tunnel using the vault continuous pouring trolley of this embodiment includes the following steps:

[0065] S1: The vault continuous casting system 300 is moved to the tunnel construction position. A plurality of slidable movable vaults 400 are arranged in the slot 204. The positions of the movable vaults 400 are adjusted so that a grouting opening is formed on the side of the slot 204 close to the second vault mold 2032 without the pumping port 206 (in this embodiment, the length of the first reserved grouting opening can be the length of four movable vaults 400, and this length can be increased or decreased later according to actual conditions).

[0066] S2: Adjust the position of the vault continuous pouring system 300 so that the pumping pipe assembly 303 extends from the above-mentioned grouting opening to the upper part near one end of the second top arch mold 2032 for grouting. After the grouting is completed, move a movable top arch 400 near the grouting opening to the grouting opening, and fix the movable top arch 400 to the side arch mold 202 to block the last grouting location. At the same time, move the grouting opening away from the second top arch mold 2032.

[0067] S3: Repeat the above step S2 until the grouting opening moves close to the first top arch mold 2031;

[0068] S4: Install a movable top arch 400 at the grouting opening, and seal the grouting opening. Adjust the position of the arch continuous casting system 300 so that the outlet of the pumping pipe assembly 303 is connected to the pumping interface 206 of the first top arch mold 2031. Then grout the remaining uncast part to complete the continuous casting of the tunnel secondary lining.

[0069] In this embodiment, the length of the slot 204 along the length direction of the tunnel is an integer multiple of the length of the movable top arch 400, the width of the slot 204 is 350 mm, the length of the movable top arch 400 along the length direction of the tunnel is 500 mm, the length of the first top arch mold 2031 along the length direction of the tunnel is 2000 mm, and the length of the second top arch mold 2032 along the length direction of the tunnel is 1000 mm.

[0070] Example 2:

[0071] The portal system 100, formwork system 200 and the like in the vault continuous casting trolley of this embodiment are the same as those in embodiment 1, and the construction method is also the same as that in embodiment 1. The difference lies in the structure of the vault continuous casting system 300.

[0072] Specifically, such as Figures 9-15 As shown, the vault continuous casting system 300 of this embodiment includes a rail track 6 (similar to the rail 301 in Example 1), a trolley 1 (similar to the casting trolley 302 in Example 1), a pumping pipe group 2 (similar to the pumping pipe assembly 303 in Example 1), an electronic control system 3 (similar to the electrical system 305 in Example 1), a concrete distribution hopper 4 (similar to the hydraulic assembly 304 in Example 1) and a direction adjustment device 5 (similar to the hydraulic assembly 304 in Example 1) for controlling the output direction of the pumping pipe group 2. The pumping pipe group 2, the electronic control system 3 and the concrete distribution hopper 4 are installed on the trolley 1 (the trolley 1 is provided with a mounting frame 15 for installing various auxiliary components). The trolley 1 is movably installed on the rail track 6. The electronic control system 3 is electrically connected to the concrete distribution hopper 4 and the direction adjustment device 5. Thus, by installing the pumping pipe group 2 and the concrete distribution hopper 4 on the trolley 1, and then setting the trolley 1 on the rail track 6, the trolley 1 drives the pumping pipe group 2 and the concrete distribution hopper 4 to move horizontally back and forth, and then the direction adjustment device 5 controls the output direction of the pumping pipe group 2, so that the lower window of the tunnel secondary lining trolley is poured with the concrete distribution hopper 4, and the top is continuously poured through the pumping pipe group 2, eliminating the defects of arch concrete being hollow or not dense that are easy to occur in ordinary pouring methods, further improving the existing lining process level, and improving the quality of the tunnel secondary lining.

[0073] In this embodiment, the pumping pipe group 2 includes a plurality of straight pipes 21 and curved pipes 23 connected to both ends of the straight pipes 21 through clamps 22. Specifically, the number of straight pipes 21 is five (including one vertically arranged and four horizontally arranged), and the curved pipes 23 include seven 90° curved pipes and one 45° curved pipe. The pumping pipe group 2 is installed on the trolley 1 through the pipe clamp seat 24, and the driving end of the direction adjustment device 5 is hinged to the straight pipe 21 at the output end of the pumping pipe group 2. Among them, the direction adjustment device 5 includes a hydraulic pump station 51 and a hydraulic cylinder 52 connected by pipelines. A protective cover 53 is provided on the outside of the hydraulic pump station 51. One end of the hydraulic cylinder 52 is hinged to the oil cylinder and hopper support 13 of the trolley 1, and the other end is hinged to the straight pipe 21 at the output end of the pumping pipe group 2, thereby achieving the purpose of controlling the output direction of the pumping pipe group 2.

[0074] In this embodiment, the two ends of the straight pipe 21 at the output end of the pumping pipe group 2 are respectively connected to a 45° output elbow 25 and one end of a rotating elbow 26. The rotation of the 45° output elbow 25 is coordinated with the swing of the straight pipe 21 at the output end of the pumping pipe group 2. In order to achieve injection at multiple angles of the pumping pipe group 2, the other end of the rotating elbow 26 is pivotally connected to the other straight pipe 21 of the pumping pipe group 2. A transition support steel pipe 27 is installed on the rotating elbow 26. The transition support steel pipe 27 is pivotally connected to the support hinge plate 14 of the trolley 1, thereby improving the support strength of the rotating elbow 26.

[0075] In this embodiment, the rail track 6 includes parallel track channel steels 62 and cross-connecting channel steels 63 at the bottom connected between the track channel steels 62. The bottom of the trolley 1 is equipped with walking rollers 16 and guide rollers 17 that cooperate with the track channel steels 62. The guide rollers 17 are used to limit the left and right deflection of the trolley 1. The wheel surface of the walking roller 16 is a conical surface structure, which rolls in the groove of the track channel steel 62 to achieve forward and backward movement along the rail track 6. A hydraulic motor 11 and a reducer 12 are installed at the bottom of the trolley 1, and a rack 61 is installed on the rail track 6. The hydraulic motor 11 is connected to the hydraulic pump station 51, so that the trolley 1 and the hydraulic cylinder 52 are driven at the same time by a power source (i.e., the hydraulic pump station 51). The output shaft of the hydraulic motor 11 is connected to the input shaft of the reducer 12, and the driving gear on the output shaft of the reducer 12 is engaged with the rack 61. Furthermore, the electronic control system 3 is configured to have two control modes: remote control and local control, which can control the parallel movement of the trolley 1 and the telescopic movement of the hydraulic cylinder 52 .

[0076] In this embodiment, the concrete distribution hopper 4 is mounted at the bottom on the oil cylinder and hopper support 13 and comprises a hopper 41, a partition 42, and a partition rotating mechanism 43. The concrete distribution hopper 4 is a plate-welded hollow rectangular parallelepiped with a removable top cover 417 for easy access for internal inspection and cleaning. The partition 42 is pivotally connected to the hopper 41. Discharge pipes 44 are located at the bottom of the hopper 41, on either side of the partition 42. These are steel pipes welded to the hopper 41, with a diameter slightly smaller than the short side of the hopper 41. These pipes comprise a socketed outlet pipe 413 and a string tube 414. The outlet pipe 413 is fixedly connected to the hopper 41. A clamping post 415 is circumferentially provided outside the output end of the outlet pipe 413, and an L-shaped notch 416 is provided on the string tube 414 to mate with the clamping post 415. A feed port 45 is provided at the top for inserting a pump tube to pump material into the hopper. The diaphragm rotating mechanism 43 drives the diaphragm 42 to swing relative to the discharge pipes 44 on both sides, thereby distributing the concrete flow rate of the discharge pipes 44 on both sides. This results in different concrete volumes output by the discharge pipes 44 on both sides, thereby controlling the concrete volume at the outlet of the hopper 41. Ultimately, the lateral pressure exerted by the concrete on both sides of the trolley is basically balanced, ensuring that the trolley does not deform or move due to the lateral pressure, and ensuring safe lining construction.

[0077] In this embodiment, a shaft 46 is fixedly attached to the bottom of the partition 42, one end of which is pivotally connected to the side wall of the hopper 41. The shaft 46 is located between the input ends of the two discharge pipes 44. The rotating end of the partition rotating mechanism 43 is fixedly connected to the shaft 46. Thus, the partition rotating mechanism 43 drives the shaft 46 to cause the partition 42 to swing left and right. When the partition 42 swings to the left, the material discharge opening on the right side increases, thereby causing more material to be discharged on the right side. The same principle applies to the opposite direction.

[0078] In this embodiment, the partition rotating mechanism 43 is manually adjustable, which is simple and practical. The partition rotating mechanism 43 includes a rocker handle 47 and a rotation handle limiter assembly for limiting the rotation of the rocker handle 47. The rocker handle 47 is fixedly connected to the rotating shaft 46. Specifically, the rotation handle limiter assembly includes a distribution plate 48, a spring clip 49, and a connecting plate 410 mounted on the hopper 41. The distribution plate 48 is provided with multiple positioning holes 411 concentrically relative to the rotating shaft 46. One end of the connecting plate 410 is fixedly connected to the rotating shaft 46, and the other end is connected to the spring clip 49. The spring clip 49 is provided with a limiter head that can be retracted and inserted into the positioning hole 411. The spring clip 49 includes a spring, a sliding sleeve, and a limiter bolt. One end of the spring is connected to the sliding sleeve, and the other end is connected to the limiter bolt. The limiter bolt is in sliding engagement with the inner hole of the sliding sleeve. The spring is always in a stretched state. When the inner hole of the sliding sleeve is aligned with the positioning hole 411, the limiter head on the limiter bolt is driven to insert into the positioning hole 411, thereby locking the movement of the rotating shaft 46. In this embodiment, a plurality of positioning holes 411 on the distribution plate 48 are symmetrically arranged relative to the rotation shaft 46, thereby enabling adjustment of multiple concrete volumes.

[0079] During operation, hopper 41 is fed with material through a pump tube, which passes through feed port 45 on hopper 41 and is supported by it. Initially, shaft 46 is in the neutral position, and spring clip 49 aligns with locating hole 411 in the center of distribution plate 48. At this point, partition 42 is centered and upright, and the receiving space at both sides of hopper 41 is equal. If the pump tube discharges unevenly on both sides, spring clip 49 is removed, shaft 46 is rotated, and the receiving space at the hopper 41 outlet is adjusted so that the concrete volume at both outlets is roughly equal. Then, spring clip 49 is released, and spring clip 49 is locked into position with locating hole 411 in distribution plate 48, completing the control of the concrete outlet volume.

[0080] The vault continuous casting system 300 of this embodiment cooperates with the gantry system 100, formwork system 200, notch 204, movable top arch 400, and other components of the vault continuous casting trolley in Example 1. On the one hand, by reserving the pumping notch 204 at the vault position and cooperating with the movable top arch 400, continuous casting of the top of the tunnel secondary lining can be achieved, eliminating the defects of hollowing or loose concrete in the vault portion that are prone to occur in conventional casting methods, further improving the existing lining process and enhancing the quality of the tunnel secondary lining. On the other hand, the structural optimization of the vault continuous casting system 300 of this embodiment itself can eliminate the defects of hollowing or loose concrete in the vault portion that are prone to occur in conventional casting methods, further improving the existing lining process and enhancing the quality of the tunnel secondary lining. Overall, the vault continuous casting system 300 of Example 2 replaces the vault continuous casting system 300 of Example 1 and has a better effect.

Claims

1. A vault continuous casting trolley, characterized in that: The invention comprises a portal system (100), a template system (200) and a vault continuous casting system (300), wherein the template system (200) is mounted on the portal system (100), and the vault continuous casting system (300) can be slidably mounted on the portal system (100), and the template system (200) is provided with a slot (204) arranged along the length direction of the tunnel at the vault position, and the slot (204) is provided with a movable module that can selectively close or open a certain section of the slot (204), and the movable module cooperates with the vault continuous casting system (300) to realize vault continuous casting; The template system (200) comprises a side mold (201), a side arch mold (202) and a top arch mold (203) all arranged along the length direction of the tunnel, the side mold (201) being arranged below the side arch mold (202), the side mold (201) and the side arch mold (202) being symmetrically arranged on both sides of the top arch mold (203), and the top arch mold (203) being fixed to both ends of the top of the side arch mold (202) so as to form a notch (204) between the side arch molds (202) on both sides; The top arch mold (203) comprises a first top arch mold (2031) with a pumping interface (206) and a second top arch mold (2032) without a pumping interface (206), wherein the first top arch mold (2031) and the second top arch mold (2032) are respectively located at two ends of the top of the side arch mold (202); The movable module comprises a plurality of movable top arches (400), the upper surface of the movable top arches (400) being flush with the upper surface of the template system (200), and the movable top arches (400) being slidably disposed in the slots (204) when not fixed; The slot (204) is provided with sliding plates (2041) on both sides in the longitudinal direction, and the top surface of the sliding plates (2041) does not exceed the slot (204). The movable top arch (400) is π-shaped and includes an upper panel (401) and a lower connecting plate (402). The width of the upper panel (401) matches the width of the slot (204). The lower connecting plate (402) is arranged in close contact with the end surfaces of the side arch molds (202) on both sides. When the movable top arch (400) is not fixed, it can slide on the sliding plates (2041) through the upper panel (401).

2. The vault continuous casting trolley according to claim 1, characterized in that: A plurality of transverse links (205) for connecting the two side arch moulds (202) are provided in the notch (204), and both ends of the transverse link (205) are fixed to the lower ends of the two side arch moulds (202) via a first bolt system.

3. The vault continuous casting trolley according to claim 1, characterized in that: A lower connecting seat (2021) is fixedly provided at a lower position of the side arch mold (202), and the lower connecting seat (2021) is fixedly connected to the upper longitudinal beam (101) of the portal system (100) via a second bolt system; a middle connecting seat (2022) is fixedly provided at a middle position of the side arch mold (202), and the middle connecting seat (2022) is fixedly provided on the portal system (100) via a supporting truss (102), and the middle connecting seat (2022) is fixedly connected to the supporting truss (102) via a third bolt system.

4. The vault continuous casting trolley according to any one of claims 1 to 3, characterized in that: The vault continuous casting system (300) comprises a track (301), a casting vehicle (302), a pumping pipe assembly (303), a hydraulic assembly (304) for adjusting the position of the pumping pipe assembly (303), and an electrical system (305) for controlling the casting vehicle (302) and the hydraulic assembly (304). The track (301) is arranged on the upper surface of the crossbeam of the portal system (100) along the length direction of the tunnel, and the casting vehicle (302) is movably arranged on the track (301).

5. A construction method for continuous casting of tunnel secondary lining using the vault continuous casting trolley according to claim 4, characterized in that: The following steps are involved: S1: The vault continuous casting system (300) is moved into the tunnel construction position, a plurality of slidable movable vaults (400) are arranged in the slot (204), and the position of the movable vaults (400) is adjusted so that a grouting opening is opened on one side of the slot (204) close to the second vault mold (2032) without the pumping interface (206); S2: adjusting the position of the vault continuous pouring system (300) so that the pumping pipe assembly (303) extends from the grouting opening to the upper side of one end of the second vault mold (2032) for grouting. After the grouting is completed, a movable vault (400) close to the grouting opening is moved to the grouting opening, and the movable vault (400) is fixed to the side vault mold (202) to block the last grouting position, and at the same time, the grouting opening is moved in a direction away from the second vault mold (2032); S3: Repeat the above S2 until the grouting opening moves close to the first top arch mold (2031); S4: Install a movable top arch (400) at the grouting opening, seal the grouting opening, adjust the position of the arch top continuous casting system (300), connect the outlet of the pumping pipe assembly (303) to the pumping interface (206) of the first top arch mold (2031), and then grout the remaining uncast part to complete the continuous casting of the tunnel secondary lining.

6. The construction method according to claim 5, characterized in that: The length of the notch (204) along the tunnel length direction is an integral multiple of the length of the movable top arch (400), the width of the notch (204) is 300-350 mm, the length of the movable top arch (400) along the tunnel length direction is 450-550 mm, and the length of the first top arch mold (2031) and the second top arch mold (2032) along the tunnel length direction is 1000-2000 mm.

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