Longitudinal needle beam slip form trolley for tunnel bottom plate

Abstract

The utility model discloses a tunnel bottom plate longitudinal needle beam slip form trolley. The tunnel bottom plate longitudinal needle beam slip form trolley comprises a formwork assembly, a hopper, a chute, a needle beam, a hydraulic advancing device used for pushing the formwork assembly to move along the needle beam, a movable supporting leg, a front supporting leg, a rear supporting leg and two sets of anti-floating devices. The hydraulic advancing device is arranged so that the formwork assembly can walk in the length direction of the needle beam, after the formwork assembly walks to the limit, conversion of another working section of the needle beam and another working section of an assembly of the needle beam is achieved through supporting of the movable supporting legs and the formwork assembly, and continuous pouring of adit bottom arch concrete is achieved within the length range of the needle beam. Calendaring and plastering can be performed in time before initial setting of the concrete, bubbles on the surface of the concrete are eliminated, and the apparent quality of the concrete is improved; the trolley can walk without independently arranging an external track, so that the labor and tool amortization cost is reduced; the bottom arch trolley is suitable for bottom arch lining construction of different section ranges with the same inner diameter.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a tunnel bottom plate longitudinal needle beam sliding formwork trolley. Background Art

[0002] Currently, the hydraulic engineering industry primarily utilizes traditional needle-beam bottom arch trolleys and track-mounted hydraulic slipform trolleys for bottom arch lining construction. The needle-beam bottom arch trolley draws on successful experience in top and side arch lining construction, adapting to the specific characteristics of tunnel bottom arches. This has enabled the gradual mechanization and industrialization of tunnel construction. The advent of the needle-beam bottom arch trolley has increased the mechanization of tunnel bottom arch construction, effectively improving production efficiency and reducing costs, aligning with the trend toward industrialized production in tunnel engineering. However, with increasing demands for concrete pouring quality, efficiency, and appearance, needle-beam bottom arch trolleys struggle to meet the demands of large-scale, rapid construction. Consequently, track-mounted hydraulic slipform trolley technology emerged, enabling continuous concrete pouring while improving construction efficiency and quality. However, excessive amortization of labor and tool costs persists in flat tunnel construction.

[0003] At present, the main construction technologies used in tunnel bottom arch construction include: needle beam bottom arch trolley and track-type bottom arch slipform trolley.

[0004] (1) Disadvantages of the needle beam bottom arch trolley: ① The construction strength is limited by the length of the formwork and the strength of the concrete. Even if more resources are allocated, the construction progress cannot be significantly improved. ② During the pouring process, it is difficult to completely expel all the bubbles in the concrete. After the formwork is removed, the surface quality is poor. The reasons are: ① It is a fixed combination formwork trolley. It can only pour one compartment at a time according to the length of the formwork. The concrete strength does not meet the demoulding requirements, and the next working surface cannot be constructed. The construction progress cannot be significantly improved. ② After the needle beam bottom arch formwork is installed, the bottom arch surface will be sealed. During the pouring and vibration process of the bottom arch, it is difficult to completely expel all the bubbles in the concrete. After the formwork is removed, the concrete has already set, and it is difficult to repair the surface quality.

[0005] (2) Disadvantages of the rail-type bottom arch sliding formwork trolley: ① The sliding of the formwork during construction is greatly affected by the fluidity of the concrete and is easily blocked; ② Along the sliding direction, when pouring the side walls on both sides of the bottom arch, it is difficult to pile up the concrete to form a shape; ③ In the flat tunnel sliding formwork construction, the sliding formwork trolley adopts a rail travel system, and the amortization cost of labor and rail steel in the track laying construction is high. The reasons are as follows: ① During the formwork walking in the pouring project, the walking system only relies on the hydraulic system and the wire rope traction. The sliding of the formwork during the construction process is greatly affected by the fluidity of the concrete. When the fluidity is poor, the sliding is easily blocked; ② Affected by the friction between the formwork and the concrete, along the sliding direction, the width of the formwork is generally 2.5m-3m. When pouring the side walls on both sides of the bottom arch, the accumulated concrete tends to flow forward, and the concrete of the side walls on both sides is difficult to accumulate and form; ③ In the flat tunnel sliding formwork construction, a track walking system is used. It is necessary to manually drill holes in the bottom plate to install track dowels and supporting I-beams, and install track seats and tool tracks. When pouring the bottom arch concrete, the dowels and supporting I-beams will be buried in the poured concrete and cannot be reused. The supporting steel depreciates greatly and the construction cost is high.

[0006] Therefore, it is necessary to develop a tunnel floor longitudinal needle beam sliding formwork trolley to solve the above problems. Utility Model Content

[0007] The purpose of the utility model is to design a tunnel floor longitudinal needle beam sliding formwork trolley in order to solve the above problems.

[0008] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0009] A tunnel floor longitudinal needle beam sliding formwork trolley, comprising:

[0010] The template assembly includes a bottom mold, two small side molds, a portal assembly, multiple first travel cams, and multiple tracks. The portal assembly is formed into a rectangular frame structure. The bottom mold is installed at the bottom of the portal assembly. The two small side molds are respectively connected to both sides of the bottom mold. The multiple first travel cams are divided into two groups and are respectively placed at the top and bottom of the portal assembly.

[0011] Hopper; the hopper is installed on the top of the portal assembly;

[0012] Chute; the lower end of the hopper is connected to the upper end of the chute, and the lower end of the chute is connected to the feed port of the small side mold;

[0013] Needle beam; the gantry assembly is mounted on the outside of the needle beam, and the multiple tracks are divided into two groups and respectively placed at the top and bottom of the needle beam. The first travel cam at the top slides with the track at the top, and the first travel cam at the bottom slides with the track at the bottom.

[0014] A hydraulic travel device for pushing the template assembly along the needle beam; one part of the hydraulic travel device is connected to the track, and the other part is connected to the gantry assembly;

[0015] Movable support leg; the upper part of the movable support leg is formed into a rectangular frame structure, the upper part of the movable support leg is sleeved on the outside of the needle beam, and multiple second travel cams are divided into two groups and respectively placed at the top and bottom of the upper part of the movable support leg. The second travel cam at the top slides with the track at the top, and the second travel cam at the bottom slides with the track at the bottom; a support leg oil cylinder is provided at the bottom of the movable support leg, and the support leg oil cylinder is installed vertically, and a support foot is installed on the lower output end of the support leg oil cylinder;

[0016] front outrigger;

[0017] Rear support legs; the front and rear support legs are respectively installed under the two ends of the needle beam and supported on the ground when the template assembly is working;

[0018] Two sets of anti-floating devices; the anti-floating devices include anti-floating brackets and top support mechanisms. The anti-floating brackets of the two sets of anti-floating devices are respectively installed above the two ends of the needle beam, and the top support mechanism is installed above the anti-floating brackets. The top of the top support mechanism is connected to the top of the tunnel.

[0019] Furthermore, the tunnel floor longitudinal needle beam slipform trolley also includes a first electric hoist, which is installed at the front end of the needle beam, and the first wire rope acting end of the first electric hoist is connected to the gantry assembly.

[0020] Furthermore, two horizontal supports are provided on two opposite side walls of each anti-floating support. The two horizontal supports are provided on the same horizontal line, and ends of the two horizontal supports are respectively connected to two sides of the tunnel.

[0021] Furthermore, the tunnel floor longitudinal needle beam slipform trolley also includes a second electric hoist and a second steel wire rope. The second electric hoist is installed at the front end of the needle beam, and the anchor point is placed on the ground in front of the trolley. The second electric hoist is connected to the anchor point through the second steel wire rope.

[0022] Furthermore, ladders are provided below both ends of the needle beam.

[0023] Furthermore, the gantry assembly includes multiple gantries and two longitudinal beams. The gantry is formed in a U shape. The multiple gantries are arranged parallel to each other. The lower first ends of the multiple gantries are connected by a longitudinal beam, and the lower second ends of the multiple gantries are connected by another longitudinal beam. The two longitudinal beams are parallel to each other. A chord beam is connected below each gantry and located at the lower part of the longitudinal beam. The chord beam is parallel to the gantry. A plurality of platform columns are provided at the lower end of each chord beam. The lower ends of the multiple platform columns and both ends of the chord beam are connected to the inner side of the bottom mold.

[0024] Furthermore, a curved walkway plate is provided at one end of the door frame assembly.

[0025] Furthermore, the template assembly also includes a side mold cylinder and a screw jack. The first end of the small side mold is hinged to the bottom mold, the fixed end of the side mold cylinder is hinged to the first end of the chord beam, the actuating end of the side mold cylinder is hinged to the second end of the small side mold, the first end of the screw jack is hinged to the side wall of the door frame, and the second end of the screw jack is hinged to the second end of the small side mold.

[0026] Furthermore, the hydraulic travel device includes a walking articulated seat, a walking oil cylinder, a first locking oil cylinder, a second locking oil cylinder, a first locking frame, a first locking tongue, a first tooth plate, a second locking frame, a second locking tongue, and a second tooth plate. The upper end of the walking articulated seat is fixedly mounted on the inner side of the upper end of the door frame assembly, the first locking frame and the second locking frame are slidably placed on the track, the first tooth plate is mounted on the first locking frame and placed under the track, the second tooth plate is mounted on the second locking frame and placed under the track, the lower end of the walking articulated seat is hinged to the first end of the second locking frame, the middle part of the second locking tongue is hinged to the second locking frame, and the first end of the second locking tongue is placed The cam is connected to the second tooth plate and is used to cooperate with the second tooth plate to clamp the rail. The second end of the second locking tongue is hinged to the output end of the second locking oil cylinder, the fixed end of the second locking oil cylinder is hinged to the inner side of the second end of the second locking frame, the second end of the second locking frame is connected to the fixed end of the traveling oil cylinder, the active end of the traveling oil cylinder is hinged to the first end of the first locking frame, the fixed end of the first locking oil cylinder is hinged to the inner side of the first end of the first locking frame, the second end of the first locking oil cylinder is hinged to the first end of the first locking tongue, the middle part of the first locking tongue is hinged to the first locking frame, the second end of the first locking tongue is placed above the first tooth plate and is used to cooperate with the first tooth plate to clamp the rail.

[0027] Furthermore, an automatic cable retracting and releasing device is provided at the upper end of the movable leg.

[0028] The beneficial effects of the present invention are:

[0029] 1. The template assembly can be moved along the length of the needle beam by setting a hydraulic travel device. After the template assembly moves to the limit, the needle beam and its components can be switched to another working section through the support of the movable legs and the template assembly. The continuous pouring of flat hole bottom arch concrete can be achieved within the length of the needle beam. The surface can be smoothed and plastered in time before the initial setting of the concrete, eliminating bubbles on the concrete surface and improving the surface quality of the concrete.

[0030] 2. The trolley does not need to be equipped with a separate external track, which reduces the amortization cost of labor and tools;

[0031] 3. The bottom arch trolley is suitable for the bottom arch lining construction with the same inner diameter and different cross-section ranges;

[0032] 4. The added anti-floating device can prevent the trolley from floating while realizing rapid pouring of the bottom arch. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is the main view of the utility model;

[0034] Figure 2 It is an enlarged schematic diagram of the first part of the utility model;

[0035] Figure 3 It is an enlarged schematic diagram of the second part of the utility model;

[0036] Figure 4 This is a schematic diagram of the structure of the hydraulic travel device in the utility model;

[0037] Figure 5 It is a left view of the present utility model.

[0038] In the figure, 1, bottom mold; 2, small side mold; 3, door frame; 4, needle beam; 5, movable leg; 6, front leg; 7, rear leg; 8, hydraulic travel device; 80, travel articulated seat; 81, travel cylinder; 82, first locking cylinder; 83, second locking cylinder; 84, first locking frame; 85, first locking tongue; 86, first tooth plate; 87, second locking frame; 88, second locking tongue; 89, second tooth plate; 9 , anti-floating bracket; 10. Horizontal bracket; 11. Top support mechanism; 12. Hopper; 13. Automatic cable retracting and releasing device; 14. Second electric hoist; 15. Second wire rope; 16. Ladder; 17. First electric hoist; 18. Curved walkway board; 19. Platform column; 20. String beam; 21. Longitudinal beam; 22. Side mold cylinder; 23. Screw jack; 24. Chute; 25. Track; 26. First walking cam. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0042] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0043] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0044] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0045] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0046] like Figure 1-5 As shown, a tunnel floor longitudinal needle beam sliding formwork trolley comprises:

[0047] The template assembly includes a bottom mold 1, two small side molds 2, a gantry assembly, four first travel cams, and four tracks 25. The gantry assembly is formed into a rectangular frame structure. The bottom mold 1 is installed at the bottom of the gantry assembly. The two small side molds 2 are respectively connected to both sides of the bottom mold 1. The four first travel cams are divided into two groups and are respectively placed at the top and bottom of the gantry assembly.

[0048] Hopper 12; Hopper 12 is mounted on top of the portal assembly;

[0049] The chute 24; the lower end of the hopper 12 is connected to the upper end of the chute 24, and the lower end of the chute 24 is connected to the feed port of the small side mold 2;

[0050] Needle beam 4; the gantry assembly is mounted on the outside of the needle beam 4, and the four tracks 25 are divided into two groups and are respectively placed at the top and bottom of the needle beam 4. The first travel cam at the top slides with the track 25 at the top, and the first travel cam at the bottom slides with the track 25 at the bottom;

[0051] A hydraulic travel device 8 for pushing the template assembly along the needle beam 4; a portion of the hydraulic travel device 8 is connected to the track 25, and the other portion is connected to the gantry assembly;

[0052] Movable support leg 5; the upper part of the movable support leg 5 is formed into a rectangular frame structure, the upper part of the movable support leg 5 is sleeved on the outside of the needle beam 4, and multiple second travel cams are divided into two groups and respectively placed at the top and bottom of the upper part of the movable support leg 5. The second travel cam at the top slides with the track 25 at the top, and the second travel cam at the bottom slides with the track 25 at the bottom; a support leg cylinder is provided at the bottom of the movable support leg 5, and the support leg cylinder is installed vertically, and a support foot is installed on the lower output end of the support leg cylinder;

[0053] Front outrigger 6;

[0054] Rear support leg 7; front support leg 6 and rear support leg 7 are respectively installed under the ends of the needle beam 4 and supported on the ground when the template assembly is working;

[0055] Two sets of anti-floating devices; the anti-floating device includes an anti-floating bracket 9 and a top support mechanism 11. The anti-floating bracket 9 of the two sets of anti-floating devices are respectively installed above the two ends of the needle beam 4, and the top support mechanism 11 is installed above the anti-floating bracket 9. The top of the top support mechanism 11 is connected to the top of the tunnel.

[0056] like Figure 1 and 3 As shown, the tunnel floor longitudinal needle beam slipform trolley also includes a first electric hoist 17, which is installed at the front end of the needle beam 4, and the first wire rope action end of the first electric hoist 17 is connected to the gantry assembly.

[0057] like Figure 5 As shown, two horizontal supports 10 are provided on two opposite side walls of each anti-floating support. The two horizontal supports 10 are provided on the same horizontal line, and the ends of the two horizontal supports are respectively connected to the two sides of the tunnel.

[0058] like Figure 1 and 3 As shown, the tunnel floor longitudinal needle beam slipform trolley also includes a second electric hoist 14 and a second steel wire rope 15. The second electric hoist 14 is installed at the front end of the needle beam 4, and the anchor point is placed on the ground in front of the trolley. The second electric hoist 14 is connected to the anchor point through the second steel wire rope 15.

[0059] like Figure 1 and3 As shown, ladders 16 are provided below both ends of the needle beam 4.

[0060] like Figure 1 and 2 As shown in Figure 5, the gantry assembly includes multiple gantries 3 and two longitudinal beams 21. The gantry 3 is formed in a U shape. The multiple gantries 3 are arranged parallel to each other. The lower first ends of the multiple gantries 3 are connected by a longitudinal beam 21, and the lower second ends of the multiple gantries 3 are connected by another longitudinal beam 21. The two longitudinal beams 21 are parallel to each other. A chord beam 20 is connected below each gantry 3 and located at the lower part of the longitudinal beam 21. The chord beam 20 is parallel to the gantry 3. A plurality of gantry columns 19 are provided at the lower end of each chord beam 20. The lower ends of the plurality of gantry columns 19 and the two ends of the chord beam 20 are connected to the inner side of the bottom mold.

[0061] like Figure 2 As shown, a curved walkway plate 18 is provided at one end of the door frame assembly.

[0062] like Figure 5 As shown, the template assembly also includes a side mold cylinder 22 and a screw jack 23. The first end of the small side mold 2 is hinged to the bottom mold 1. The fixed end of the side mold cylinder 22 is hinged to the first end of the chord beam 20. The actuating end of the side mold cylinder 22 is hinged to the second end of the small side mold 2. The first end of the screw jack 23 is hinged to the side wall of the door frame, and the second end of the screw jack 23 is hinged to the second end of the small side mold 2.

[0063] like Figure 4As shown, the hydraulic travel device 8 includes a travel articulated seat 80, a travel cylinder 81, a first locking cylinder 82, a second locking cylinder 83, a first locking frame 84, a first locking tongue 85, a first tooth plate 86, a second locking frame 87, a second locking tongue 88, and a second tooth plate 89. The upper end of the travel articulated seat 80 is fixedly mounted on the inner side of the upper end of the door frame assembly, the first locking frame 84 and the second locking frame 87 are slidably placed on the track 25, the first tooth plate 86 is mounted on the first locking frame 84 and placed below the track 25, the second tooth plate 89 is mounted on the second locking frame 87 and placed below the track 25, the lower end of the travel articulated seat 80 is hinged to the first end of the second locking frame 87, the middle part of the second locking tongue 88 is hinged to the second locking frame 87, and the first end of the second locking tongue 88 is hinged to the second locking frame 87. The end is placed above the second tooth plate 89 and is used to cooperate with the second tooth plate 89 to clamp the rail 25. The second end of the second locking tongue 88 is hinged to the output end of the second locking cylinder 83, and the fixed end of the second locking cylinder 83 is hinged to the inner side of the second end of the second locking frame 87. The second end of the second locking frame 87 is connected to the fixed end of the traveling cylinder 81, and the active end of the traveling cylinder 81 is hinged to the first end of the first locking frame 84. The fixed end of the first locking cylinder 82 is hinged to the inner side of the first end of the first locking frame 84, the second end of the first locking cylinder 82 is hinged to the first end of the first locking tongue 85, the middle part of the first locking tongue 85 is hinged to the first locking frame 84, and the second end of the first locking tongue 85 is placed above the first tooth plate 86 and is used to cooperate with the first tooth plate 86 to clamp the rail 25. When the hydraulic travel device is working, first, the first locking cylinder 82 pushes the first locking tongue 85 to rotate, and the second end of the first locking tongue 85 moves downward to cooperate with the first tooth plate 86 to clamp the rail 25. After the travel cylinder 81 works, it pushes the second locking frame 87, the travel hinge seat 80 and the template assembly to move forward. When it moves into place, the second locking cylinder 83 pushes the second locking tongue 88 to rotate, and the first end of the second locking tongue 88 moves downward to cooperate with the second tooth plate 89 to clamp the rail 25. The first locking cylinder 82 pulls back the first locking tongue 85, and the first locking tongue 85 rotates. The second end of the first locking tongue 85 releases the clamping of the rail 25, and the travel cylinder 81 pulls back, causing the first locking frame 84 to move forward along the rail. This reciprocating process completes the forward movement of the template assembly on the needle beam 4. When the template assembly and the movable support leg 5 support the entire sliding formwork trolley and the needle beam needs to be moved, a similar principle is used to complete it.

[0064] After the travel oil cylinder 81 works, it pushes the second locking frame 87, the travel articulated seat 80 and the template assembly forward.

[0065] like Figure 1 and 3 As shown, an automatic cable retracting device 13 is provided at the upper end of the movable leg 5 .

[0066] In some embodiments:

[0067] In the formwork assembly: the stand columns 19 and the string beam 20 form the skeleton of the bottom formwork and are connected to the bottom formwork as a whole by bolts. The small side forms on both sides are hinged to the bottom formwork to form the formwork system. During the construction process, the small side forms 2 on both sides are adjusted by adjusting the side form oil cylinder 22 and the screw jack 23; in addition, the adjacent portal columns are connected by a scissor frame to form the portal frame. The longitudinal beam and the string beam are connected as a whole by bolts. The four first travel cams (26) are divided into two groups, two in each group, and are respectively arranged on the inner side of the upper crossbeam of the portal frame and on the string beam.

[0068] The needle beam assembly consists of a main beam (pulley beam), horizontal tie rods, vertical tie rods, diagonal tie rods, a scissor frame, and rails, all connected by welding and bolting (this is prior art and will not be described in detail here). The needle beam is first assembled into three sections: front, middle, and rear, before being hoisted. The rails are then welded to the main beam (pulley beam) longitudinally to form a single unit, serving as the travel track for the supporting rollers. The hydraulic travel rails are secured to the center of the top and bottom of the needle beam using steel pads and bolts.

[0069] The support system (this is prior art and will not be described in detail here) consists of a front support leg 6, a rear support leg 7, and a movable support leg 5. The front and rear support legs include: a support leg, a slide, a transverse connecting frame, a limiting mechanism, a translation trolley, and a support. The support legs are fixed to the main beams on both sides of the needle beam end with bolts and fixed to each other by a transverse connecting frame. Slides are arranged inside the support legs to adjust the vertical displacement of the needle beam. A connecting steel plate and a translation trolley are fixed at the bottom of the slide, and a translation cylinder is installed between the translation trolleys. The translation trolley and the support are connected by mortise and tenon joints, and a limiting mechanism is installed on the support with pins to fix the translation trolley. The front support leg is a rectangular pad, and the rear support leg is an arc-shaped pad (placed on the surface of the completed bottom arch). The movable leg includes: a movable leg jack, a support, and a gantry. The movable leg is connected to the needle beam via the gantry, and upper and lower walking rollers are arranged between the gantry and the needle beam. The support is composed of a connecting plate and a rib plate, which is connected to the support legs through pins, and the inclination of the bottom can be adjusted around the pins.

[0070] Hydraulic jack system (this is existing technology and will not be described in detail here): It consists of the hydraulic system at the front end of the trolley (six-way valve), the hydraulic system at the rear end of the trolley (six-way valve), the movable leg hydraulic system (four-way valve) and the template and travel hydraulic system (nine-way valve). The front and rear end hydraulic devices are installed at both ends of the needle beam, including: the lifting cylinder installed on the slide, the translation cylinder between the translation trolleys, the anti-floating cylinder of the anti-floating top rod, and the lateral anti-displacement cylinder of the horizontal support. The movable leg hydraulic system is mainly the movable leg cylinder installed in the leg, and the control system is arranged on the top platform of the movable leg gantry. The template and travel hydraulic system includes: the side mold cylinder that controls the small side molds on both sides, and the locking cylinder and travel cylinder arranged in the middle of the top of the gantry for controlling the template and gantry system. The cylinders are connected by pins, and the control system is arranged on the top platform of the template gantry.

[0071] The concrete distribution system consists of a hopper and a chute. The hopper is located in the center of the formwork gantry, and concrete is pumped into the hopper via a pump pipe. The chute is tilted and overlapped on the gantry, evenly distributing concrete from the hopper to the feed inlets of the small formwork on both sides.

[0072] The anti-floating device consists of an anti-floating support 9, a horizontal support 10, and a support mechanism 11, all connected by bolts. The anti-floating device is installed at the front and rear ends of the needle beam. An anti-floating cylinder is installed at the center of the support mechanism. The bottom of the cylinder is fixed to the middle intersection of the horizontal scissors frame, and the top is connected to the anti-floating top rod via a connecting steel plate and bolts. A lateral anti-displacement cylinder is installed at the center of the horizontal support. The bottom of the cylinder is fixed to the middle intersection of the vertical scissors frame, and the top is connected to the horizontal top rod via a connecting steel plate and bolts.

[0073] Other Auxiliary Devices: An automatic cable retractor is installed on the top of the active leg portal frame to assist in pulling the formwork system and supporting the movement of the active legs. A second electric hoist, anchor points, and a second wire rope together form the anchoring system for the front end of the trolley needle beam. Ladders are welded to the ends of the needle beam, providing access to the inner passageway of the needle beam for construction personnel. A working platform (expanded steel mesh) is located on the top of the formwork portal frame, the top of the active leg portal frame, and the inner side of the needle beam. A curved walkway plate is bolted to the rear of the formwork, providing a platform for construction personnel to perform finishing and plastering.

[0074] Description of working principle:

[0075] Needle beam slipform trolley; as the pouring progresses, the hydraulic walking device is started, and the hydraulic device is locked at the same time, assisted by the automatic cable retracting device, so that the formwork slides forward, keeping the sliding speed consistent with the pouring speed. For the concrete surface after the formwork slides away, the construction workers will promptly perform calendering and plastering on the curved walkway board.

[0076] After the needle beam slipform trolley arrives at the construction area, the front and rear hydraulic devices of the needle beam are operated to align the needle beam with the tunnel center and adjust its height to the desired position. The formwork (bottom formwork and small side formwork) is then aligned to the tunnel lining contour. The front and rear hydraulic devices are then operated to secure the front and rear anti-floating mechanisms and the horizontal anti-displacement supports on both sides. The formwork position and the needle beam axis are simultaneously measured and verified. After verification, the hydraulic control system is shut down. The side form cylinders and screw jacks are installed, and the trolley is secured to the front anchor point using a second electric hoist and a second wire rope, completing the trolley's formwork erection. As pouring progresses, the hydraulic travel device is activated, assisted by the automatic cable retraction device and the first electric hoist, allowing the formwork assembly to slide forward, maintaining the same speed as the pouring. After the formwork slides off, construction workers promptly apply a smoothing finish on the curved walkway slab.

[0077] As pouring progresses, if the needle beam needs to be moved forward, the locking mechanism in the hydraulic travel device is activated to secure the formwork. Simultaneously, the outrigger cylinders of the movable legs are activated, lowering the legs to form two support points for the needle beam. The front and rear hydraulic devices are then activated to lift the front and rear supports, retracting the anti-floating mechanism and the anti-displacement brackets on both sides. The travel cylinders of the hydraulic travel device are then activated to push the needle beam forward to the designated position. The front and rear supports are then lowered to support the formwork. A second steel wire rope is then used to secure the needle beam to the front anchor point. The formwork adjustment, installation, and pouring operations are repeated.

[0078] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A tunnel floor longitudinal needle beam sliding formwork trolley, characterized in that: include: Template assembly; The template assembly comprises a bottom mold (1), two small side molds (2), a door frame assembly, a plurality of first travel cams (26), and a plurality of tracks (25); the door frame assembly is formed into a rectangular parallelepiped frame structure; the bottom mold (1) is mounted at the bottom of the door frame assembly; the two small side molds (2) are respectively connected to both sides of the bottom mold (1); and the plurality of first travel cams (26) are divided into two groups and respectively placed at the top and bottom of the door frame assembly; Hopper (12); the hopper (12) is mounted on the top of the portal assembly; The chute (24); the lower end of the hopper (12) is connected to the upper end of the chute (24), and the lower end of the chute (24) is connected to the feed port of the small side mold (2); Needle beam (4); the door frame assembly is sleeved on the outside of the needle beam (4); a plurality of tracks (25) are divided into two groups and respectively placed at the top and bottom of the needle beam (4); a first travel cam (26) at the top is slidably matched with the track (25) at the top, and a first travel cam (26) at the bottom is slidably matched with the track (25) at the bottom; A hydraulic travel device (8) for pushing the template assembly to move along the needle beam (4); a portion of the hydraulic travel device (8) is connected to the track (25), and another portion is connected to the portal assembly; A movable leg (5); the upper portion of the movable leg (5) is formed into a rectangular frame structure, the upper portion of the movable leg (5) is sleeved on the outside of the needle beam (4), a plurality of second travel cams are divided into two groups and are respectively placed at the top and bottom of the upper portion of the movable leg (5), the second travel cam located at the top is slidably matched with the track (25) located at the top, and the second travel cam located at the bottom is slidably matched with the track (25) located at the bottom; a leg oil cylinder is provided at the bottom of the movable leg (5), the leg oil cylinder is vertically installed, and a support foot is installed on the lower output end of the leg oil cylinder; Front legs (6); Rear support leg (7); front support leg (6) and rear support leg (7) are respectively installed below the two ends of the needle beam (4) and supported on the ground when the template assembly is working; Two sets of anti-floating devices; the anti-floating devices include anti-floating brackets (9) and a top supporting mechanism (11); the anti-floating brackets (9) of the two sets of anti-floating devices are respectively installed above the two ends of the needle beam (4); the top supporting mechanism (11) is installed above the anti-floating brackets (9); and the top of the top supporting mechanism (11) is connected to the top of the tunnel.

2. The tunnel floor longitudinal needle beam sliding formwork trolley according to claim 1, characterized in that: The tunnel floor longitudinal needle beam slipform trolley further comprises a first electric hoist (17), which is mounted on the front end of the needle beam (4), and a first steel wire rope action end of the first electric hoist (17) is connected to the portal assembly.

3. The tunnel floor longitudinal needle beam sliding formwork trolley according to claim 1, characterized in that: Two horizontal supports (10) are provided on two opposite side walls of each anti-floating support, the two horizontal supports (10) are provided on the same horizontal line, and the ends of the two horizontal supports are respectively connected to two sides of the tunnel.

4. The tunnel floor longitudinal needle beam sliding formwork trolley according to claim 1, characterized in that: The tunnel floor longitudinal needle beam slipform trolley further comprises a second electric hoist (14) and a second steel wire rope (15). The second electric hoist (14) is installed at the front end of the needle beam (4), and the anchor point is placed on the ground in front of the trolley. The second electric hoist (14) is connected to the anchor point via the second steel wire rope (15).

5. The tunnel floor longitudinal needle beam sliding formwork trolley according to claim 1, characterized in that: Ladders (16) are provided below both ends of the needle beam (4).

6. The tunnel floor longitudinal needle beam sliding formwork trolley according to claim 1, characterized in that: The portal assembly comprises a plurality of portals (3) and two longitudinal beams (21). The portals (3) are formed into a U shape. The plurality of portals (3) are arranged parallel to each other. The first ends of the lower portions of the plurality of portals (3) are connected by a longitudinal beam (21). The second ends of the lower portions of the plurality of portals (3) are connected by another longitudinal beam (21). The two longitudinal beams (21) are parallel to each other. A string beam (20) is connected below each portal (3) and located below the longitudinal beam (21). The string beam (20) is parallel to the portal (3). A plurality of platform columns (19) are arranged at the lower end of each string beam (20). The lower ends of the plurality of platform columns (19) and both ends of the string beam (20) are connected to the inner side of the bottom mold.

7. The tunnel floor longitudinal needle beam sliding formwork trolley according to claim 1, characterized in that: An arc-shaped walkway plate (18) is provided at one end of the door frame assembly.

8. The tunnel floor longitudinal needle beam sliding formwork trolley according to claim 1, characterized in that: The template assembly also includes a side mold cylinder (22) and a screw jack (23). The first end of the small side mold (2) is hinged to the bottom mold (1). The fixed end of the side mold cylinder (22) is hinged to the first end of the string beam (20). The actuating end of the side mold cylinder (22) is hinged to the second end of the small side mold (2). The first end of the screw jack (23) is hinged to the side wall of the door frame, and the second end of the screw jack (23) is hinged to the second end of the small side mold (2).

9. The tunnel floor longitudinal needle beam sliding formwork trolley according to claim 1, characterized in that: The hydraulic travel device (8) includes a travel articulated seat (80), a travel oil cylinder (81), a first locking oil cylinder (82), a second locking oil cylinder (83), a first locking frame (84), a first locking tongue (85), a first tooth plate (86), a second locking frame (87), a second locking tongue (88), and a second tooth plate (89). The upper end of the travel articulated seat (80) is fixedly mounted on the inner side of the upper end of the door frame assembly. The first locking frame (84), the second locking frame (85) and the second locking frame (86) are fixedly mounted on the inner side of the upper end of the door frame assembly. The locking frame (87) is slidably placed on the track (25), the first tooth plate (86) is mounted on the first locking frame (84) and is placed below the track (25), the second tooth plate (89) is mounted on the second locking frame (87) and is placed below the track (25), the lower end of the travel hinge seat (80) is hinged to the first end of the second locking frame (87), the middle part of the second locking tongue (88) is hinged to the second locking frame (87), and the second locking tongue (88) is hinged to the second locking frame (87). ) is placed above the second tooth plate (89) and is used to cooperate with the second tooth plate (89) to clamp the rail (25), the second end of the second locking tongue (88) is hinged to the output end of the second locking cylinder (83), the fixed end of the second locking cylinder (83) is hinged to the inner side of the second end of the second locking frame (87), the second end of the second locking frame (87) is connected to the fixed end of the traveling cylinder (81), and the active end of the traveling cylinder (81) is hinged to the first locking frame (87). The first end of the tightening frame (84) is hinged, the fixed end of the first locking oil cylinder (82) is hinged to the inner side of the first end of the first locking frame (84), the second end of the first locking oil cylinder (82) is hinged to the first end of the first locking tongue (85), the middle part of the first locking tongue (85) is hinged to the first locking frame (84), and the second end of the first locking tongue (85) is placed above the first tooth plate (86) and is used to cooperate with the first tooth plate (86) to clamp the rail (25).

10. The tunnel floor longitudinal needle beam sliding formwork trolley according to claim 1, characterized in that: An automatic cable retracting and releasing device (13) is provided at the upper end of the movable leg (5).

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