A lifting device for tunnel arch bridges and the arch bridge itself.

Abstract

This utility model relates to the technical field of tunnel construction equipment, specifically to a lifting device for a tunnel invert arch trestle and the invert arch trestle itself. The lifting device includes a lifting cylinder and a safety support installed at the bottom of the trestle body. The upper ends of the safety support and the lifting cylinder are both connected to the bottom of the trestle body, and the lower ends of the safety support and the lifting cylinder are both supported on the ground below the trestle body. The lengths of the lifting cylinder and the safety support are adjustable. The lifting cylinder is used to lift or lower the trestle body, and the safety support is used to support the trestle body. This utility model allows for height adjustment of the invert arch trestle through the lifting device. When space is insufficient in the invert arch construction area, the lifting device can be used to raise the invert arch trestle to provide sufficient space for continued construction of the invert arch below, without affecting passage above the invert arch. It allows for simultaneous construction of the invert arch and the tunnel face during the final stage of invert arch construction, maintaining construction progress and improving construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction equipment technology, and in particular to a lifting device and an inverted arch trestle for tunnels. Background Technology

[0002] The invert arch trestle is a crucial temporary structure in tunnel construction. Its main function is to resolve spatial and temporal conflicts between invert arch construction and tunnel face excavation and muck removal, enabling parallel operations and significantly improving construction efficiency and safety. Specifically, the invert arch trestle is erected above the invert arch construction area at the bottom of the tunnel, providing a continuous, stable, and uninterrupted passage for transport vehicles (such as dump trucks, concrete mixer trucks, and material trucks) unaffected by the invert arch construction below. Vehicles can safely drive across the trestle, completely avoiding the construction area below and thus preventing conflicts with the invert arch construction progress. However, currently, the height of the invert arch trestle is fixed and cannot be adjusted. As construction in the invert arch area continues, the height of the invert arch will increase, and the height difference between the invert arch and the trestle will decrease. The reduced space under the trestle makes manual invert arch filling difficult, affecting both the efficiency and quality of the filling process. Utility Model Content

[0003] The purpose of this utility model is to overcome the technical problem that the existing invert arch trestle bridge has a fixed height, which will affect the efficiency and quality of invert arch filling construction in the final stage of invert arch construction due to insufficient height of the invert arch construction area, thereby affecting the construction progress and causing low construction efficiency. The present invention provides a lifting device and an invert arch trestle bridge for tunnel invert arch trestle bridges.

[0004] In a first aspect, the present invention provides a lifting device for a tunnel arch bridge, comprising a lifting cylinder and a safety support installed at the bottom of the bridge body. The upper end of the safety support and the upper end of the lifting cylinder are both connected to the bottom of the bridge body, and the lower end of the safety support and the lower end of the lifting cylinder are both capable of supporting the ground below the bridge body. The length of the lifting cylinder and the length of the safety support are both adjustable. The lifting cylinder is used to lift or lower the bridge body, and the safety support is used to support the bridge body.

[0005] This invention utilizes a lifting device installed at the bottom of the invert arch trestle to adjust its height. When space is insufficient in the invert arch construction area, the lifting device raises the trestle to provide sufficient construction space for the invert arch below, ensuring adequate space for invert arch filling while allowing passage for transport vehicles and personnel. Specifically, pressure is applied to the lifting cylinder to extend it, raising the trestle to a preset height. The length of the safety support is then increased to support the trestle on the ground below. The pressure in the lifting cylinder is then released, allowing the safety support to stabilize the trestle at the preset height. This expands the construction area for the invert arch, maintaining passage above it without hindering continued construction. It allows for simultaneous construction of the invert arch and the tunnel face during the final stages of construction, preserving construction progress and the quality of invert arch filling, thus improving construction efficiency.

[0006] Preferably, a groove is formed at the bottom of the bridge body, and the safety support includes a fixed sleeve and a column. The fixed sleeve is fixedly connected to the bottom of the bridge body, and the inner cavity of the fixed sleeve communicates with the groove. The column passes through the fixed sleeve and can extend into the groove. The column can support the bridge body through the fixed sleeve.

[0007] Preferably, the column has a plurality of first positioning holes spaced apart along its length, and the side wall of the fixing sleeve has a second positioning hole that corresponds to the first positioning holes. The safety support also includes a positioning pin, which can be inserted into the first positioning holes and the second positioning holes to connect the fixing sleeve and the column.

[0008] Preferably, the lifting cylinder includes a sleeve and a piston rod, the piston rod passing through the sleeve, and a piston provided at one end of the piston rod extending into the sleeve, the piston rod being able to slide along the sleeve.

[0009] Preferably, the sleeve is fixedly connected to the bottom of the bridge body, and the end of the piston rod away from the piston can be supported on the ground below the bridge body.

[0010] Preferably, the lower end of the piston rod is provided with a support pad.

[0011] Preferably, the end of the piston rod away from the piston is fixedly connected to the bottom of the bridge body, and the sleeve can be supported on the ground below the bridge body.

[0012] In a second aspect, the present invention provides an arch bridge, including a bridge body and a lifting device for an arch bridge in a tunnel as described above.

[0013] Preferably, it also includes a fixed support, which is disposed at the bottom of the bridge body.

[0014] Preferably, the bridge also includes wheels, which are disposed at the bottom of the bridge body.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model provides a lifting device and an invert arch trestle for tunnel invert arch trestle. By installing a lifting device at the bottom of the invert arch trestle, the height of the trestle can be adjusted. When the space in the invert arch construction area is insufficient, the lifting device can be used to raise the height of the invert arch trestle to provide sufficient construction space for the invert arch below, ensuring sufficient construction space for invert arch filling while allowing passage for transport vehicles and personnel. Specifically, pressure can be applied to the lifting cylinder to extend it, raising the invert arch trestle to a preset height. Then, the length of the safety support is extended to support it on the ground below the trestle. The pressure in the lifting cylinder is then released, and the safety support can be used to support the invert arch trestle, stabilizing it at the preset height after lifting. This expands the space in the invert arch construction area, maintaining passage above the invert arch without affecting the continued construction. It allows for simultaneous construction of the invert arch and the tunnel face in the final stage of invert arch construction, maintaining construction progress and the quality of invert arch filling, and improving construction efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the arch bridge of this utility model before it is lifted.

[0018] Figure 2 This is a schematic diagram of the state of the arch bridge of this utility model after it has been lifted.

[0019] Figure 3 This is a schematic diagram of the lifting cylinder.

[0020] Figure 4 This is a structural diagram of a safety support.

[0021] Marked in the image:

[0022] 1. Lifting cylinder; 11. Sleeve; 12. Piston rod; 13. Piston; 14. Support pad; 2. Safety support; 21. Fixing sleeve; 211. Second positioning hole; 22. Column; 221. First positioning hole; 23. Positioning pin; 3. Fixed support; 4. Traveling wheel; 41. Telescopic mechanism; 5. Bridge body; 6. Ramp. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0024] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0026] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0027] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0028] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0029] Example 1

[0030] This embodiment provides a lifting device for a tunnel arch bridge.

[0031] Figure 1 This is a schematic diagram of the arch bridge of this utility model before it is lifted. Figure 2 This is a schematic diagram of the state of the arch bridge of this utility model after it has been lifted. Figure 3 This is a schematic diagram of the lifting cylinder. Figure 4 This is a structural diagram of a safety support.

[0032] like Figures 1 to 4 As shown in the figure, the lifting device for the tunnel arch bridge in this embodiment includes a lifting cylinder 1 and a safety support 2 installed at the bottom of the bridge body 5. The upper end of the safety support 2 and the upper end of the lifting cylinder 1 are both connected to the bottom of the bridge body 5, and the lower end of the safety support 2 and the lower end of the lifting cylinder 1 can be supported on the ground below the bridge body 5. The length of the lifting cylinder 1 and the length of the safety support 2 are both adjustable. The lifting cylinder 1 is used to lift or lower the bridge body 5, and the safety support 2 is used to support the bridge body 5. Here, the lifting cylinder 1 can be a hydraulic cylinder, a pneumatic cylinder, etc. As a component for adjusting the height of the arch bridge, the lifting cylinder 1 can also be replaced by other types of components, such as a lead screw, a push rod, a linear motor, a jack, etc. This utility model does not specifically limit this.

[0033] This invention adjusts the height of the invert arch trestle by installing a lifting device at the bottom. When space is insufficient in the invert arch construction area, the lifting device raises the trestle to provide sufficient construction space for the invert arch below, ensuring adequate space for invert arch filling while allowing passage for transport vehicles and personnel. Specifically, pressure is applied to the lifting cylinder 1 to extend it, raising the invert arch trestle to a preset height. The length of the safety support 2 is then increased to support the trestle on the ground below. The pressure in the lifting cylinder 1 is then released, allowing the safety support 2 to stabilize the trestle at the preset height. This expands the construction area for the invert arch, maintaining passage above it without hindering continued construction. It allows for simultaneous construction of the invert arch and the tunnel face during the final stages of construction, preserving construction progress and the quality of invert arch filling, thus improving construction efficiency.

[0034] In this embodiment, a groove is formed at the bottom of the bridge body 5. The safety support 2 includes a fixing sleeve 21 and a column 22. The fixing sleeve 21 is fixedly connected to the bottom of the bridge body 5, and the inner cavity of the fixing sleeve 21 communicates with the groove. The column 22 passes through the fixing sleeve 21 and can extend into the groove. The column 22 can support the arched trestle bridge through the fixing sleeve 21. Here, the groove at the bottom of the bridge body 5 can be formed between the steel structural members of the bridge body 5, that is, the gap between the steel structural members can be formed as a groove. If the bottom of the bridge body 5 is a single piece of base plate structure, The groove needs to be correspondingly opened at the position of the column 22, because the height of the column 22 is fixed, while the height of the arch bridge is adjusted according to the position of the fixing sleeve 21 on the column 22. When the fixing sleeve 21 is lower on the column 22, the column 22 will inevitably extend into the groove. If there is no groove structure at the bottom of the bridge body 5, the arch bridge will interfere with the column 22 when it is lowered and cannot be lowered. Therefore, a groove for accommodating the column 22 needs to be formed at the bottom of the bridge body 5 to realize the height adjustment of the arch bridge.

[0035] In this embodiment, a plurality of first positioning holes 221 are spaced apart along the length of the column 22, and a second positioning hole 211 corresponding to the first positioning hole 221 is provided on the side wall of the fixing sleeve 21. The safety support 2 also includes a positioning pin 23, which can pass through the first positioning hole 221 and the second positioning hole 211 to connect the fixing sleeve 21 and the column 22. The second positioning hole 211 on the fixing sleeve 21 can correspond to any one of the first positioning holes 221 at different heights of the fixing sleeve 21 on the column 22. The position of the fixing sleeve 21 on the column 22 can be determined by the height of the bridge body 5. For example, when the arch bridge is raised by the lifting action of the lifting cylinder 1, the position of the fixing sleeve 21 on the column 22 also rises. During the raising process, a suitable first positioning hole 221 on the column 22 can be selected to correspond to the second positioning hole 211 on the fixing sleeve 21. After the second positioning hole 211 corresponds to one of the first positioning holes 221, the lifting action of the lifting cylinder 1 can be stopped. The positioning pin 23 is inserted into the corresponding first positioning hole 221 and second positioning hole 211 to fix the fixing sleeve 21 to the column 22. Then, the lifting cylinder 1 is depressurized to realize the support of the safety support 2 for the arch bridge at the preset height. Of course, the connection between the fixing sleeve 21 and the column 22 is not limited to opening positioning holes and fixing with positioning pin 23. Other methods can also be used, such as opening a vertical groove on the column 22 and opening a positioning hole on the fixing sleeve 21 corresponding to the groove. The fixing sleeve 21 and the column 22 can be fastened by bolts passing through the groove and the positioning hole. Moreover, the position of the fixing sleeve 21 on the column 22 can be adjusted steplessly, which can also realize the adjustment and fixation of the fixing sleeve 21 and the column 22. This utility model does not make specific limitations in this regard.

[0036] In this embodiment, the lifting cylinder 1 includes a sleeve 11 and a piston rod 12. The piston rod 12 passes through the sleeve 11, and a piston 13 is provided at one end of the piston rod 12 that extends into the sleeve 11. The piston rod 12 can slide along the sleeve 11. The piston 13 and the piston rod 12 can be integrally connected or fixedly connected by welding to form an integral structure. The piston 13 and the piston rod 12 can slide together in the sleeve 11. The space in the sleeve 11 can be divided into a rod chamber and a rodless chamber by the piston 13. When the pressure in the rodless chamber is higher than the pressure in the rod chamber, the piston rod 12 can be pushed out of the sleeve 11, which can extend the lifting cylinder 1. When the pressure in the rod chamber is higher than the pressure in the rodless chamber, the piston rod 12 can be pushed into the sleeve 11, which can shorten the lifting cylinder 1.

[0037] Specifically, when it is necessary to raise the height of the inverted arch bridge, pressure can be applied to the rodless cavity of the sleeve 11 to push the piston rod 12 out of the sleeve 11, thereby extending the lifting cylinder 1 and raising the inverted arch bridge. Conversely, when it is necessary to lower the height of the inverted arch bridge, the pressure in the rodless cavity of the sleeve 11 can be reduced. When the pressure in the rodless cavity is insufficient to support the inverted arch bridge, the weight of the inverted arch bridge can be used to compress the piston rod 12 so that it extends into the sleeve 11, causing the lifting cylinder 1 to contract and lower the inverted arch bridge.

[0038] Alternatively, the sleeve 11 is fixedly connected to the bottom of the bridge body 5, and the end of the piston rod 12 away from the piston 13 can be supported on the ground below the bridge body 5; here, the setting direction of the lifting cylinder 1 can be selected, for example, the end where the sleeve 11 is located can be facing upwards, that is... Figure 1 and Figure 2 As shown in the diagram, the sleeve 11 is connected to the bottom of the bridge body 5, with the end of the piston rod 12 facing downwards, meaning the piston rod 12 is supported on the ground below the bridge body 5.

[0039] Optionally, a support 14 is provided at the lower end of the piston rod 12; here, when the direction of the lifting cylinder 1 is as follows... Figure 1 and Figure 2 When the direction shown is such that the piston rod 12 is supported on the ground below the bridge body 5, a support pad 14 can be set at the lower end of the piston rod 12 to increase the contact area between the lower end of the lifting cylinder 1 and the ground, reduce the pressure, and protect the contact end between the piston rod 12 and the ground to avoid structural damage.

[0040] Alternatively, the end of the piston rod 12 away from the piston 13 is fixedly connected to the bottom of the bridge body 5, and the sleeve 11 can be supported on the ground below the bridge body 5; compared to the above... Figure 1 and Figure 2 The direction of the lifting cylinder 1 shown in the diagram can also be reversed, so that the end containing the piston rod 12 faces upwards, which is the same as... Figure 1 , Figure 2 The directions shown are opposite, with the piston rod 12 connected to the bottom of the bridge body 5, and the end where the sleeve 11 is located facing downwards, that is, the sleeve 11 is supported on the ground below the bridge body 5.

[0041] When the sleeve 11 is installed facing downwards, a support pad 14 can also be installed at the bottom of the sleeve 11 to reduce the pressure on the ground.

[0042] Example 2

[0043] This embodiment provides an arched trestle bridge.

[0044] The arch bridge in this embodiment includes the bridge body 5 and the lifting device for the tunnel arch bridge in embodiment 1.

[0045] The lifting device for the tunnel arch bridge in Example 1 is located at the bottom of the bridge body 5.

[0046] In this embodiment, the arch bridge also includes a fixed support 3, which is located at the bottom of the bridge body 5. The height of the fixed support 3 determines the initial height of the arch bridge, that is, when the arch bridge is at the initial height, it can be supported by the fixed support 3.

[0047] In this embodiment, the arch bridge also includes a traveling wheel 4, which is located at the bottom of the bridge body 5. The arch bridge can be moved by the traveling wheel 4. A telescopic mechanism 41, such as a hydraulic cylinder, a pneumatic cylinder, or a lead screw, can also be installed between the traveling wheel 4 and the bridge body 5. When it is necessary to move the arch bridge, the telescopic mechanism 41 can be extended to lower the position of the traveling wheel 4 below the safety support 2, the lifting cylinder 1, and the fixed support 3. The traveling wheel 4 can then support the upper bridge body 5, and the arch bridge can be moved by the traveling wheel 4.

[0048] In this embodiment, ramps 6 are also provided on both sides of the bridge body 5 (only one ramp 6 is shown in the figure). The ramps 6 facilitate the movement of transport vehicles and personnel up and down the arch bridge. The ramps 6 and the bridge body 5 can be connected by a hinge. The ramps 6 and the bridge body 5 can rotate relative to each other. When the bridge body 5 is raised, the ramps 6 can rotate downward to increase the slope, so that the cantilever side of the ramps 6 is always in contact with the ground, thus not affecting the movement of transport vehicles and personnel up and down the arch bridge. Similarly, when the bridge body 5 is lowered, the ramps 6 can rotate upward to decrease the slope, so that the cantilever side of the ramps 6 is always in contact with the ground, also not affecting the movement of transport vehicles and personnel up and down the arch bridge.

[0049] It should be noted that the lifting cylinder 1, the safety support 2, the fixed support 3, and the telescopic mechanism 41 on the traveling wheel 4 can all be connected to the bottom of the bridge body 5 by welding or other fixed connection methods. Specifically, if the sleeve 11 of the lifting cylinder 1 faces upward, the sleeve 11 can be welded to the bottom of the bridge body 5; if the piston rod 12 of the lifting cylinder 1 faces upward, the piston rod 12 can be welded to the bottom of the bridge body 5; the fixed sleeve 21 of the safety support 2 can be welded to the bottom of the bridge body 5; of course, the above components can also be connected to the bottom of the bridge body 5 by other commonly used fixed connection methods, and this utility model does not make specific limitations on this.

[0050] In summary, this utility model provides a lifting device and an invert arch trestle for tunnel invert arch trestle. By installing a lifting device at the bottom of the invert arch trestle to adjust its height, the height of the invert arch trestle can be raised when there is insufficient space in the invert arch construction area, so that there is enough construction space below the invert arch to continue construction. This ensures sufficient construction space for invert arch filling while allowing the invert arch trestle to maintain the passage of transport vehicles and personnel. Specifically, pressure is applied to the lifting cylinder to extend it, lifting the invert arch trestle to a preset height. Then, the length of the safety support is extended to support it on the ground below the trestle. The pressure in the lifting cylinder is then released, and the safety support can then be used to support the invert arch trestle, stabilizing it at the preset height after lifting. This expands the space in the invert arch construction area, maintaining passage above the invert arch without affecting the continued construction. It allows for simultaneous construction of the invert arch and the tunnel face in the final stage of invert arch construction, maintaining construction progress and the quality of invert arch filling, and improving construction efficiency.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting device for a tunnel invert trestle, characterized in that, The bridge body (5) includes a lifting cylinder (1) and a safety support (2) installed at the bottom of the bridge body (5). The upper end of the safety support (2) and the upper end of the lifting cylinder (1) are both connected to the bottom of the bridge body (5). The lower end of the safety support (2) and the lower end of the lifting cylinder (1) can both be supported on the ground below the bridge body (5). The length of the lifting cylinder (1) and the length of the safety support (2) can both be adjusted. The lifting cylinder (1) is used to lift or lower the bridge body (5), and the safety support (2) is used to support the bridge body (5).

2. A lifting device for a tunnel invert causeway according to claim 1 characterised in that, The bottom of the bridge body (5) has a groove. The safety support (2) includes a fixing sleeve (21) and a column (22). The fixing sleeve (21) is fixedly connected to the bottom of the bridge body (5). The inner cavity of the fixing sleeve (21) communicates with the groove. The column (22) passes through the fixing sleeve (21) and can extend into the groove. The column (22) can support the bridge body (5) through the fixing sleeve (21).

3. A lifting device for a tunnel invert causeway according to claim 2, characterised in that, The column (22) is provided with a plurality of first positioning holes (221) spaced apart along its length. The side wall of the fixing sleeve (21) is provided with a second positioning hole (211) that corresponds to the first positioning hole (221). The safety support (2) also includes a positioning pin (23). The positioning pin (23) can be inserted into the first positioning hole (221) and the second positioning hole (211) to connect the fixing sleeve (21) and the column (22).

4. A lifting device for a tunnel invert causeway according to any one of claims 1 to 3, characterised in that, The lifting cylinder (1) includes a sleeve (11) and a piston rod (12). The piston rod (12) passes through the sleeve (11), and a piston (13) is provided at one end of the piston rod (12) that extends into the sleeve (11). The piston rod (12) can slide along the sleeve (11).

5. A lifting device for a tunnel invert causeway according to claim 4, characterised in that, The sleeve (11) is fixedly connected to the bottom of the bridge body (5), and the end of the piston rod (12) away from the piston (13) can be supported on the ground below the bridge body (5).

6. A lifting device for a tunnel invert causeway according to claim 5, characterised in that, The piston rod (12) is provided with a support (14) at its lower end.

7. The lifting device for a tunnel invert causeway according to claim 4, characterized in that, The piston rod (12) is fixedly connected to the bottom of the bridge body (5) at one end away from the piston (13), and the sleeve (11) is able to support the ground below the bridge body (5).

8. A inverted arch trestle characterized in that, Includes the bridge body (5) and the lifting device for the tunnel arch trestle as described in any one of claims 1 to 7.

9. A haunch causeway according to claim 8, characterised in that, It also includes a fixed support (3), which is located at the bottom of the bridge body (5).

10. A haunch causeway according to claim 8 or 9, characterised in that, It also includes a traveling wheel (4), which is located at the bottom of the bridge body (5).

Images