Self-propelled hydraulic trestle for tunnel construction
By designing a self-propelled hydraulic trestle, combining hydraulic lifting outriggers, traveling wheels, and an automatic trolley, and adopting a rigid-flexible connection structure, the problem of displacement and inconvenience of moving the invert arch formwork due to vibration during tunnel construction was solved, achieving stability and convenience in tunnel construction.
Patent Information
- Application Number
- CN202511423773.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-01-06
AI Technical Summary
In existing tunnel construction, the separate structure of the invert arch formwork and the trestle bridge causes vibration to affect the displacement or deformation of the invert arch formwork, and it is inconvenient to move it, making it difficult to balance the problems of vibration impact and ease of movement.
A self-propelled hydraulic trestle is adopted, which uses a combination of front and rear hydraulic lifting outriggers, traveling wheels and automatic trolleys, combined with a rigid and flexible connection structure to achieve self-propelled movement and support of the hydraulic trestle. A rotating jacking mechanism is used to achieve rigid or flexible connection to avoid vibration from trestle traffic affecting the invert arch pouring.
The hydraulic trestle bridge was able to move on its own and provide stable support, thus avoiding the impact of vibrations from trestle bridge traffic on the invert arch pouring and ensuring the stability and convenience of construction.
Smart Images
Figure CN121273371A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of tunnel technology, and specifically relates to a self-propelled hydraulic trestle bridge for tunnel construction. Background Technology
[0002] An inverted arch is a reverse-arched structure installed at the bottom of a tunnel to improve the stress conditions of the superstructure. It is one of the main components of the tunnel structure. On the one hand, it effectively transfers the ground pressure above the tunnel to the underground through the tunnel sidewall structure or the load on the road surface, and on the other hand, it effectively resists the reaction force from the strata below the tunnel. The inverted arch and the secondary lining together form the tunnel as a whole, increasing the structural stability.
[0003] The self-propelled invert arch trestle is a device specifically designed to solve the mutual interference between the invert arch construction and the tunnel face construction process. It can achieve parallel construction, that is, vehicles and people can pass on the bridge, while the invert arch reinforcement is tied under the bridge. It comes with a complete set of invert arch formwork to realize the invert arch and filling concrete pouring.
[0004] In actual construction, the invert arch formwork and the trestle bridge need to be used in combination. However, the invert arch formwork and the trestle bridge currently use separate structures. This can avoid the vibration generated during the passage of the trestle bridge from causing displacement or deformation of the invert arch formwork. However, this separate structure also causes the invert arch formwork to be inconvenient to move after the invert arch is poured. How to balance the problem of movement impact and the problem of easy movement is an urgent need for those skilled in the art. Summary of the Invention
[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a self-propelled hydraulic trestle for tunnel construction. This self-propelled hydraulic trestle achieves self-propelled movement and support by combining front and rear hydraulic lifting outriggers, traveling wheels, and an automatic trolley. Furthermore, through a rigid-flexible connection structure, it can prevent vibrations from the trestle from affecting the invert arch pouring construction within the full-width formwork.
[0006] The objective of this invention is achieved through the following technical solutions: A self-propelled hydraulic trestle for tunnel construction, the self-propelled hydraulic trestle comprising a trestle body and a full-width sliding template for the invert arch; The main body of the trestle bridge includes a main bridge and a front approach bridge and a rear approach bridge respectively hinged to both ends of the main bridge. The rear end of the main bridge is equipped with a rear hydraulic lifting outrigger and a traveling wheel. The front end of the main bridge is equipped with a front hydraulic lifting outrigger and an automatic trolley is slidably mounted thereon. A set of hydraulic legs is fixedly mounted on the lower surface of the automatic trolley. The traveling wheel travels on the surface of the already poured area of the invert arch in the tunnel, while the front hydraulic lifting outrigger and the hydraulic legs support the unpoured area of the invert arch in the tunnel. The invert arch full-width sliding formwork includes a full-width trolley and a full-width formwork. The full-width trolley is slidably mounted on the main bridge of the trestle bridge, and a rigid-flexible connection structure is adopted between the full-width trolley and the full-width formwork. The rigid-flexible connection structure includes an upper connecting block and a lower connecting block. The upper surface of the upper connecting block is fixedly connected to the full-width trolley, and the lower surface of the lower connecting block is fixedly connected to the upper surface of the full-width template. A tapered groove is formed on the lower surface of the upper connecting block. The lower connecting block includes a vertical sliding sleeve assembly and a cone. The lower end of the cone is fixedly connected to the vertical sliding sleeve assembly. The cone is inserted into the tapered groove, and the size of the cone is exactly the same as the size of the tapered groove. The upper connecting block has a lateral locking mechanism on both sides. The lateral locking mechanism has a lateral sliding rod to fix the cone in the tapered groove to form a rigid connection.
[0007] The automated trolley is positioned at the inner end of the front hydraulic lifting outrigger.
[0008] The height of the full-width template is the same as the height of the already poured area of the invert arch. The top of the full-width template has a horizontal connecting plate, and the lower connecting block of the rigid-flexible connection structure is fixedly connected to the horizontal connecting plate.
[0009] The vertical sliding sleeve assembly includes an outer sleeve and an inner sleeve. The inner sleeve is inserted into the outer sleeve and forms a vertical sliding fit. The bottom end of the inner sleeve has a circular boss that slides in fit with the inner wall of the outer sleeve. The upper end of the outer sleeve is provided with a limiting boss to limit and block the sliding range of the circular boss on the inner sleeve.
[0010] An electromagnet is fixedly installed at the top of the conical groove of the upper connecting block. The cone is a metal cone. When the electromagnet is energized, the cone is attracted upward so that the cone is completely matched with the conical groove.
[0011] The upper connecting block has transverse channels on both sides of the conical groove. A transverse sliding rod and a return spring are installed within each channel. The return spring is fitted onto the transverse sliding rod, with one end fixedly connected to the end of the channel located on the wall of the conical groove, and the other end fixedly connected to the transverse sliding rod. The outer end of the transverse sliding rod protrudes from the outer wall of the upper connecting block and has a sloping surface. The upper connecting block also has a rotary pushing mechanism. Arranged above the channel, the rotary pushing mechanism includes a hinge shaft, a first rotating arm, a second rotating arm, and a third rotating arm. The first rotating arm, the second rotating arm, and the third rotating arm are connected in sequence to form a rotating arm in the shape of a "∩". The length of the third rotating arm is greater than the length of the first rotating arm, and the end of the third rotating arm has a groove that matches the outer end of the transverse insertion rod. The cone has a slot for the transverse insertion rod to be pushed in, and the opening height of the slot corresponds to the opening height of the channel.
[0012] A sliding groove is provided on the outer wall of the upper connecting block, and a push-pull handle is provided on the transverse insertion rod and slides in the sliding groove.
[0013] The electromagnet is energized to magnetically attract the cone upward until it is fully matched and fitted with the conical groove. The rotary pushing mechanism is rotated so that the end of the third rotating arm pushes the outer end of the transverse insertion rod, and the inner end of the transverse insertion rod is pushed into the slot of the cone. The rotary pushing mechanism is rotated until the groove on the third rotating arm is aligned and engaged with the outer end of the transverse insertion rod, thus locking the transverse insertion rod. At this time, the upper connecting block and the lower connecting block form a rigid connection. The transverse sliding rod is pushed inward by the push-pull handle provided on the transverse sliding rod, and then the rotary push mechanism is rotated in the opposite direction to release the slot at the end of the third rotating arm from the alignment and engagement with the outer end of the transverse sliding rod; the push-pull handle is released, and under the rebound force of the return spring, the transverse sliding rod rebounds outward and leaves the slot in the cone; finally, the electromagnet is de-energized to allow the cone to fall under the action of gravity. At this time, there is a gap between the cone and the inner wall of the conical groove, and the upper connecting block and the lower connecting block form a flexible connection.
[0014] The advantages of this invention are: (1) The self-propelled hydraulic trestle bridge achieves its self-propelled and supporting functions through the combined use of front and rear hydraulic lifting outriggers, traveling wheels, and an automatic trolley. (2) The rigid-flexible connection structure can avoid the vibration of the trestle passing through affecting the invert arch pouring construction in the full-width template; the rotating jacking mechanism used can lock the transverse insertion rod to ensure the stability of the rigid connection. Attached Figure Description
[0015] Figure 1 This is a side view of the self-propelled hydraulic trestle bridge in this invention; Figure 2 This is a schematic diagram of the planar arrangement between the full-width sliding template of the inverted arch and the main bridge of the trestle in this invention; Figure 3 This is a schematic diagram of the connection between the full-width trolley and the full-width sliding template of the inverted arch in this invention through a rigid-flexible connection structure; Figure 4 This is a schematic diagram of the rigid-flexible connection structure in the present invention in a flexible connection state; Figure 5 This is a schematic diagram of the inner cone of the rigid-flexible connection structure of the present invention being closely attached to the conical groove by electromagnetic adsorption. Figure 6 This is a schematic diagram illustrating the process of the rotating jacking mechanism rotating and jacking the transversely moving insert rod within the rigid-flexible connection structure of the present invention. Figure 7 This is a schematic diagram of the rotating jacking mechanism inside the rigid-flexible connection structure of the present invention pushing the transverse insertion rod inward and locking it. like Figure 1-7 The markings in the diagram are as follows: 1. Main bridge of the trestle; 2. Walking wheel; 3. Rear hydraulic lifting leg; 4. Automatic trolley; 5. Hydraulic leg; 6. Front hydraulic lifting leg; 7. Full-width sliding template of the invert arch; 8. Full-width trolley; 9. Cast-in-place area of the invert arch; 10. Rigid-flexible connection structure; 11. Rotary jacking mechanism; 11. Hinge shaft; 1101. First rotating arm; 1102. Second rotating arm; 1103. Third rotating arm; 1104. Groove; 1105. Upper connecting block; 12. Electromagnet; 13. Conical groove; 14. Cone; 15. Slot; 16. Inner sleeve; 17. Circular boss; 18. Outer sleeve; 19. Limiting boss; 20. Lateral locking mechanism; 21. Lateral insertion rod; 2101. Slope surface; 2102. Return spring; 2103. Channel; 2104. Push-pull handle; 2105. Detailed Implementation
[0016] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art: Example: Figure 1-7 As shown, this embodiment specifically relates to a self-propelled hydraulic trestle bridge for tunnel construction, which includes the trestle bridge body and a full-width sliding template for the invert arch.
[0017] like Figure 1-3As shown, the main body of the trestle bridge includes the main bridge 1 and the front approach bridge and the rear approach bridge respectively hinged to both ends of the main bridge 1. The front approach bridge and the rear approach bridge (not shown in the figure) can form the transition slope section of the main bridge 1. The rear end of the main bridge 1 of the trestle is equipped with a rear hydraulic jacking outrigger 3 and traveling wheels 2. The front end of the main bridge 1 is equipped with a front hydraulic jacking outrigger 6 and an automatic trolley 4. The automatic trolley 4 is arranged inside the front hydraulic jacking outrigger 6. The automatic trolley 4 is mounted on the main bridge 1 and can move longitudinally along the main bridge 1 via its guide wheels. Hydraulic legs 5 are fixed on the lower surface of the automatic trolley 4. The rear end of the main bridge 1 is supported on the already poured area 9 of the invert arch, while the front end is supported on the unpoured area of the invert arch. That is, the traveling wheels 2 and rear hydraulic jacking outrigger 3 at the rear end are located on the already poured area 9 of the invert arch, and the front hydraulic jacking outrigger 6 and the hydraulic legs 5 of the automatic trolley 4 at the front end are also supported on the unpoured area of the invert arch. It should be noted that there is a height difference between the poured area 9 and the unpoured area of the invert arch, so the main bridge 1 needs to be erected to facilitate the passage of construction personnel and vehicles.
[0018] like Figure 1-3 As shown, the full-width sliding template 7 of the inverted arch includes a full-width trolley 8 and a full-width template. The full-width trolley 8 is slidably mounted on the main bridge 1 of the trestle bridge. The full-width trolley 8 and the full-width template are connected by a rigid-flexible connection structure 10. The rigid-flexible connection structure 10 includes an upper connecting block 12 and a lower connecting block. The upper surface of the upper connecting block 12 is fixedly connected to the full-width trolley 8, and the lower surface of the lower connecting block is fixedly connected to the upper surface of the full-width template. A conical groove 14 is provided on the lower surface of the upper connecting block 12. The lower connecting block includes a vertical sliding sleeve assembly and a cone 15. The lower end of the cone 15 is fixedly connected to the vertical sliding sleeve assembly. The cone 15 is inserted into the conical groove 14, and the size of the cone 15 is exactly the same as the size of the conical groove 14. The upper connecting block 12 has a transverse locking mechanism 21 on both sides. The transverse locking mechanism 21 has a transverse sliding rod 2101 to fix the cone 15 in the conical groove 14 to form a rigid connection. An electromagnet 13 is fixedly installed at the top of the conical groove 14 of the upper connecting block 12. The cone 15 located below is a metal cone. When the electromagnet 13 is energized, the cone 15 can be attracted upwards so that the cone 15 is completely matched with the conical groove 14, forming a controllable relationship. The height of the full-width template is the same as the height of the already poured area 9 of the invert arch. The top of the full-width template has a transverse connecting plate to connect the templates on both sides. The lower connecting block of the rigid-flexible connection structure 10 is fixedly connected to the transverse connecting plate.
[0019] Among them, such as Figure 3-7As shown, the vertical sliding sleeve assembly includes an outer sleeve 19 and an inner sleeve 17. The inner sleeve 17 is inserted into the outer sleeve 19 and forms a vertical sliding fit. The bottom end of the inner sleeve 17 has a circular boss 18 that slides in fit with the inner wall of the outer sleeve 19. The upper end of the outer sleeve 19 is provided with a limiting boss 20 to limit and block the sliding range of the circular boss 18 on the inner sleeve 17, preventing the inner sleeve 17 from coming out of the outer sleeve 19.
[0020] Furthermore, transverse channels 2104 are respectively opened on both sides of the tapered groove 14 in the upper connecting block 12. A transverse sliding rod 2101 and a return spring 2103 are installed in the channel 2104. The return spring 2103 is fitted onto the transverse sliding rod 2101. One end of the return spring 2103 is fixedly connected to the end of the channel 2104 located on the wall of the tapered groove 14, and the other end of the return spring 2103 is fixedly connected to the transverse sliding rod 2101. The outer end of the transverse sliding rod 2101 protrudes from the outer wall of the upper connecting block 12, and a ramp surface 2102 is opened at the outer end of the transverse sliding rod 2101. A rotary pushing mechanism 11 is also provided on the upper connecting block 12. The rotary pushing mechanism 11 is arranged above the channel 2104. The rotary pushing mechanism 11 includes a hinge shaft 1101 and a first rotating arm 1102. The first rotating arm 1102, the second rotating arm 1103, and the third rotating arm 1104 are connected in sequence to form a rotating arm in the shape of a "∩". The length of the third rotating arm 1104 is greater than the length of the first rotating arm 1102. The end of the third rotating arm 1104 has a groove 1105 that matches the outer end of the transverse insertion rod 2101. That is, the shape of the groove 1105 corresponds to the shape of the outer end of the transverse insertion rod 2101 and the slope surface 2102 it opens. The slope surface 2102 is conducive to the rotational transition matching of the end groove 1105 of the third rotating arm 1104. The cone 15 is provided with a slot 16 for the transverse insertion rod 2101 to be pushed in. The opening height of the slot 16 corresponds to the opening height of the channel 2104.
[0021] A groove (not shown in the figure) is provided on the outer wall of the upper connecting block 12, and a push-pull handle 2105 is provided on the transverse insertion rod 2101 and slides in the groove.
[0022] like Figure 1-7 As shown, the full-width trolley 8 and the full-width template are connected by a rigid-flexible connection structure 10. The connection can be switched between rigid and flexible depending on actual needs. The specific method is as follows: (1) The electromagnet 13 is energized to magnetically attract the cone 15 upward until it is fully matched and attached to the conical groove 14. The rotating push mechanism 11 on the upper connecting block 12 is rotated so that the end of the third rotating arm 1104 pushes the outer end of the transverse insertion rod 2101. The inner end of the transverse insertion rod 2101 is pushed into the slot 16 of the cone 15. The rotating push mechanism 11 is rotated until the groove 1105 on the third rotating arm 1104 is aligned and engaged with the outer end of the transverse insertion rod 2101 and the transverse insertion rod 2101 is locked. At this time, the upper connecting block 12 and the lower connecting block form a rigid connection. In the rigid connection state, the full-width trolley 8 can drive the full-width template to move.
[0023] (2) Push the transverse insertion rod 2101 inward by the push-pull handle 2105 provided on the transverse insertion rod 2101, and then rotate the rotating push mechanism 11 in the opposite direction so that the slot 1105 at the end of the third rotating arm 1104 is released from the alignment and fastening with the outer end of the transverse insertion rod 2101; release the push-pull handle 2105, and under the action of the return spring 2103, the transverse insertion rod 2101 rebounds outward and leaves the slot 16 in the cone 15. Finally, de-energize the electromagnet 13 so that the cone 15 falls under the action of gravity. At this time, there is a gap between the cone 15 and the inner wall of the conical groove 14, and the upper connecting block 12 and the lower connecting block form a flexible connection, which can avoid the vibration of the trestle passing through affecting the invert arch pouring construction in the full-width template.
[0024] The beneficial effects of this embodiment are: (1) The self-propelled hydraulic trestle bridge achieves its self-propelled and supporting functions through the combined use of front and rear hydraulic lifting outriggers, traveling wheels, and an automatic trolley. (2) The rigid-flexible connection structure can avoid the vibration of the trestle passing through affecting the invert arch pouring construction in the full-width template; the rotating jacking mechanism used can lock the transverse insertion rod to ensure the stability of the rigid connection.
Claims
1. A self-propelled hydraulic trestle for tunnel construction, characterized in that The self-propelled hydraulic trestle comprises a trestle body and an arch full-width sliding formwork; The trestle body comprises a main trestle bridge and front and rear lead bridges respectively hinged at both ends of the main trestle bridge, the rear end of the main trestle bridge is provided with a rear hydraulic jacking leg and a walking wheel, the front end of the main trestle bridge is provided with a front hydraulic jacking leg and slidingly sleeved with an automatic trolley, the lower surface of the automatic trolley is fixedly provided with a group of hydraulic legs; the walking wheel travels on the surface of the arch-cast region in the tunnel, and the front hydraulic jacking leg and the hydraulic legs are supported in the arch-unpoured region in the tunnel; The arch full-width sliding formwork comprises a full-width trolley and a full-width formwork, the full-width trolley is slidingly sleeved on the main trestle bridge, and a rigid-flexible connection structure is adopted between the full-width trolley and the full-width formwork; The rigid-flexible connection structure comprises upper and lower connecting blocks, the upper surface of the upper connecting block is fixedly connected with the full-width trolley, and the lower surface of the lower connecting block is fixedly connected with the upper surface of the full-width formwork; a tapered groove is formed in the lower surface of the upper connecting block, the lower connecting block comprises a vertical sliding sleeve group and a cone, the lower end of the cone is fixedly connected with the vertical sliding sleeve group, the cone is correspondingly inserted into the tapered groove, and the size of the cone is completely same as that of the tapered groove; the two sides of the upper connecting block are provided with transverse locking mechanisms, the transverse locking mechanisms are provided with transverse insertion rods to fix the cone in the tapered groove to form rigid connection.
2. A self-propelled hydraulic trestle for tunnel construction according to claim 1, characterized in that The automatic trolley is arranged at the inner end of the front hydraulic jacking leg.
3. A self-propelled hydraulic trestle for tunnel construction according to claim 1, characterized in that The height of the full-width formwork is same as that of the arch-cast region, the top of the full-width formwork is provided with a transverse connecting plate, and the lower connecting block of the rigid-flexible connection structure is fixedly connected with the transverse connecting plate.
4. A self-propelled hydraulic trestle for tunnel construction according to claim 1, characterized in that The vertical sliding sleeve group comprises an outer sleeve and an inner sleeve, the inner sleeve is inserted into the outer sleeve to form vertical sliding fit, the bottom end of the inner sleeve is provided with a circular boss and is slidingly fitted with the inner wall surface of the outer sleeve, and the upper end of the outer sleeve is provided with a limiting boss to limit and block the sliding range of the circular boss on the inner sleeve.
5. A self-propelled hydraulic trestle for tunnel construction according to claim 1, characterized in that The top end of the tapered groove of the upper connecting block is fixedly provided with an electromagnet, and the cone is a metal cone, which is upwardly adsorbed by the electromagnet to completely match the tapered groove.
6. A self-propelled hydraulic trestle for tunnel construction according to claim 5, characterized in that The lateral hole is provided with a horizontal moving plug rod and a reset spring, the reset spring is sleeved on the horizontal moving plug rod, one end of the reset spring is fixedly connected with the end of the hole located on the wall surface of the conical groove, and the other end of the reset spring is fixedly connected with the horizontal moving plug rod; the outer end of the horizontal moving plug rod protrudes from the outer wall surface of the upper connecting block, and the outer end of the horizontal moving plug rod is provided with an inclined surface; the upper connecting block is further provided with a rotary pushing mechanism, the rotary pushing mechanism is arranged above the hole, the rotary pushing mechanism comprises a hinge shaft, a first rotating arm, a second rotating arm and a third rotating arm, the first rotating arm, the second rotating arm and the third rotating arm are sequentially connected and form a rotating arm in the shape of a "∩", the length of the third rotating arm is greater than that of the first rotating arm, and the end of the third rotating arm is provided with a groove matched with the outer end of the horizontal moving plug rod; the conical body is provided with an insertion groove for pushing the horizontal moving plug rod, and the height of the insertion groove corresponds to the height of the hole.
7. A self-propelled hydraulic trestle for tunnel construction according to claim 6, characterized in that A sliding groove is formed in the outer wall surface of the upper connecting block, and a push-pull handle is arranged on the horizontal moving plug rod and slides in the sliding groove.
8. A self-propelled hydraulic trestle for tunnel construction according to claim 7, characterized in that The electromagnet is energized to magnetically attract the conical body upward to completely match the conical groove, the rotary pushing mechanism is rotated to push the outer end of the horizontal moving plug rod with the end of the third rotating arm, the inner end of the horizontal moving plug rod is pushed into the insertion groove of the conical body, the rotary pushing mechanism is continuously rotated until the groove on the third rotating arm is in position and buckled with the outer end of the horizontal moving plug rod and the horizontal moving plug rod is locked, at this time, the upper connecting block and the lower connecting block are rigidly connected; The horizontal moving plug rod is pushed inward through the push-pull handle arranged on the horizontal moving plug rod, then the rotary pushing mechanism is reversely rotated to release the buckling of the groove on the end of the third rotating arm with the outer end of the horizontal moving plug rod, the push-pull handle is released, the horizontal moving plug rod is rebounded outward and away from the insertion groove in the conical body under the rebounding force of the reset spring, and finally the electromagnet is de-energized to make the conical body fall under the action of gravity, at this time, there is a gap between the conical body and the inner wall surface of the conical groove, and the upper connecting block and the lower connecting block are flexibly connected.