Hydraulic Jacking Integral Steel End Formwork for Secondary Lining of Highway Tunnels and Construction Method

Abstract

The present application relates to a hydraulically lifted integral steel end formwork for the secondary lining of a highway tunnel, and relates to the field of road tunnel construction, and is used to block the end face of the secondary lining. It includes a pedestal, a hydraulic assembly, and an end formwork. There are several end formworks, and they are all fan-shaped. A hinge is provided between two adjacent end formworks, and the hinge is used to hinge two adjacent end formworks. Several end formworks are adapted to the end face of the secondary lining, and two adjacent end formworks are close to each other and abut one side. The hydraulic assembly includes a first hydraulic cylinder and a hydraulic pump station. There are several first hydraulic cylinders, and they are all connected to the hydraulic pump station. The fixed end of the first hydraulic cylinder is hinged to the pedestal, and the movable end of the first hydraulic cylinder is connected to the hinge, and there is a hinge between two adjacent first hydraulic cylinders. The present application also relates to a construction method for a steel end formwork. The present application has the effect of facilitating the installation and disassembly of the end formwork of the secondary lining.

Description

Technical Field

[0001] This application relates to the field of road tunnel construction, and in particular to a hydraulic jacking integral steel end form for the secondary lining of a highway tunnel and a construction method. Background Art

[0002] During the construction of a highway tunnel, the excavated tunnel is usually initially supported first, and then the secondary lining is carried out through a lining trolley to reinforce the tunnel by the secondary lining.

[0003] Currently, during the process of the secondary lining, wooden formwork is mainly used as the end formwork for pouring concrete for the lining. The wooden end formwork is generally fabricated on-site, and then the fabricated wooden end formwork is spliced, and the spliced wooden end formwork is used as the blocking end formwork for the secondary lining.

[0004] Since the wooden end formwork blocks the secondary lining in a splicing manner, it is not easy to install and disassemble the end formwork, thereby reducing the construction efficiency of the secondary lining. Summary of the Invention

[0005] In order to facilitate the installation and disassembly of the end formwork for the secondary lining, this application provides a hydraulic jacking integral steel end form for the secondary lining of a highway tunnel and a construction method.

[0006] A hydraulic jacking integral steel end form for the secondary lining of a highway tunnel and a construction method provided by this application adopt the following technical solutions:

[0007] In the first aspect, this application provides a hydraulic jacking integral steel end form for the secondary lining of a highway tunnel, adopting the following technical solutions:

[0008] A hydraulic jacking integral steel end form for the secondary lining of a highway tunnel, used for blocking the end face of the secondary lining, includes a pedestal, a hydraulic component, and an end form. There are several end forms, and they are all fan-shaped rings. An articulated member is arranged between two adjacent end forms for articulating the two adjacent end forms. The several end forms are adapted to the end face of the secondary lining. The mutually approaching sides of two adjacent end forms are in contact. The hydraulic component includes a first hydraulic cylinder and a hydraulic pump station. There are several first hydraulic cylinders, and they are all connected to the hydraulic pump station. The fixed end of the first hydraulic cylinder is articulated with the pedestal, and the movable end of the first hydraulic cylinder is connected to the articulated member. There is an articulated member spaced between two adjacent first hydraulic cylinders.

[0009] By adopting the above technical solution, the movable ends of a number of first hydraulic cylinders are extended through a hydraulic pump station. The movable ends of the first hydraulic cylinders push the hinge members. Since the adjacent end formworks are hinged through the hinge members, under the push of the first hydraulic cylinders, a number of end formworks are gradually unfolded and adapted to the end face of the secondary lining. At the same time, under the action of the jacking force of the first hydraulic cylinders, a number of end formworks are easy to maintain the unfolded state, thus completing the installation of the end formworks of the secondary lining; after a section of the secondary lining is completed, the movable ends of a number of first hydraulic cylinders are retracted through the hydraulic pump station, so that a number of end formworks are folded, and the disassembly of the end formworks of the secondary lining is completed. Furthermore, under the action of the first hydraulic cylinders, through the unfolding and folding of a number of end formworks, the end formworks of the secondary lining are convenient for installation and disassembly.

[0010] Optionally, the hinge member includes a hinge rod and a connecting rod. There are a number of hinge rods, and they are all located at the abutting positions of two adjacent end formworks. The middle of the hinge rod is bent, and the bending direction faces the end formwork. One end of the hinge rod is hinged to one end formwork, and the other end is hinged to another end formwork. A number of hinge rods and the connecting rod are fixedly connected, and the connecting rod is hinged to the movable end of the first hydraulic cylinder.

[0011] By adopting the above technical solution, two adjacent end formworks are hinged through a number of hinge rods, making the connection between two adjacent end formworks more firm and not prone to separation. At the same time, the bending of the hinge rod towards the end formwork enables two adjacent end formworks to be folded in two directions. And since the connecting rod and a number of hinge rods are fixedly connected, the first hydraulic cylinder can push and pull the connecting rod to enable a number of hinge rods to be simultaneously pushed and pulled, reducing the number of first hydraulic cylinders and saving costs.

[0012] Optionally, sealing rubber strips are fixedly arranged on the mutually approaching sides of two adjacent end formworks, and the sealing rubber strips are in a compressed state.

[0013] By adopting the above technical solution, sealing rubber strips are arranged on the mutually approaching sides of two adjacent end formworks, improving the sealing performance at the abutting position between two adjacent end formworks.

[0014] Optionally, the end formwork is made of steel.

[0015] By adopting the above technical solution, compared with wood, steel has higher stiffness and strength. During use, the steel end formwork is less likely to deform than the wooden end formwork. Therefore, the steel end formwork has a longer service life, enabling the end formwork to be reused and saving the consumption of wood resources.

[0016] Optionally, the hydraulic component further includes a second hydraulic cylinder. A plurality of second hydraulic cylinders are provided and are all connected to the hydraulic pump station. The plurality of second hydraulic cylinders are all located between two adjacent first hydraulic cylinders. The fixed end of the second hydraulic cylinder is fixedly connected to the pedestal, and the movable end is in close contact with the connecting rod.

[0017] By adopting the above technical solution, since the movable end of the second hydraulic cylinder is in close contact with the connecting rod, the connecting rod located between two adjacent first hydraulic cylinders is subjected to the pressing force of the second hydraulic cylinder. During the secondary lining process, the joints where two adjacent end forms are in contact with each other can withstand the pressure of the concrete, so that the end forms are not easily folded during the process of pouring concrete.

[0018] Optionally, a rubber pad is provided between the second hydraulic cylinder and the connecting rod, and the rubber pad is fixedly connected to the movable end of the second hydraulic cylinder.

[0019] By adopting the above technical solution, when the movable end of the second hydraulic cylinder presses against the connecting rod, since the movable end of the second hydraulic cylinder is fixedly connected with a rubber pad, the second hydraulic cylinder is not likely to damage the connecting rod during the process of pressing against the connecting rod.

[0020] Optionally, on the side of the end form where the hinge rod is hinged, a circular reinforcing steel ring is threadedly connected, and a cross-shaped reinforcing rib is fixedly arranged inside the reinforcing steel ring.

[0021] By adopting the above technical solution, by threadedly connecting a circular reinforcing steel ring to the end form, the lateral stiffness and longitudinal stiffness of the end form are improved, so that the end form is not easily bent and deformed under the extrusion of the concrete. And due to the threaded connection method, the reinforcing steel ring is easy to remove from the end form, so that the end form is not easily affected by the reinforcing steel ring during the folding process.

[0022] Optionally, the hydraulic component further includes a third hydraulic cylinder. A plurality of third hydraulic cylinders are provided. The fixed end of the third hydraulic cylinder is fixedly connected to the pedestal, and the movable end of the third hydraulic cylinder is used to contact the ground.

[0023] By adopting the above technical solution, the third hydraulic cylinder can apply a vertically upward pressure to the end form, so that the end form is in close contact with the primary support surface, and it is not easy for slurry leakage to occur between the end form and the primary support. And by supporting the pedestal with the third hydraulic cylinder, the position of the end form is more stable during use.

[0024] Optionally, a plurality of moving wheels are rotatably arranged on the pedestal.

[0025] By adopting the above technical solution, when it is necessary to move the pedestal, the movable end of the third hydraulic cylinder is contracted. Since the pedestal is provided with moving wheels, the pedestal can be easily moved through the moving wheels, shortening the construction time of the secondary lining and making the use of the end formwork more flexible.

[0026] Second, the present application provides a construction method for the above steel end formwork, adopting the following technical solution:

[0027] A construction method for the above steel end formwork includes the following steps:

[0028] Initial support leveling: Check the flatness of the initial support of the tunnel, and level the unqualified positions through shotcrete;

[0029] Pedestal positioning: Move the pedestal carrying the end formwork and the hydraulic components to the set position of the end formwork;

[0030] Unfolding the end formwork: Start the hydraulic pump station, and the hydraulic pump station drives a number of first hydraulic cylinders to fully unfold a number of end formworks, which are adapted to the end face of the secondary lining to complete the installation of the end formwork;

[0031] Shrinking the end formwork: After a section of secondary lining is completed, fold and shrink a number of end formworks through the hydraulic pump station to complete the disassembly of the end formwork, and move the pedestal to the set position of the end formwork of the next section of secondary lining.

[0032] By adopting the above technical solution, before installing the end formwork, first detect the flatness of the primary support, and level the positions with unqualified flatness through shotcrete, so that it is not easy to leak slurry between the end formwork and the primary support; transport the pedestal carrying the end formwork to the set position of the end formwork. After the pedestal is positioned, drive the first hydraulic cylinder through the hydraulic pump station, and the first hydraulic cylinder pushes the hinge to unfold a number of end formworks to complete the installation of the end formwork; after the end formwork is installed, then pour the secondary lining concrete. After the concrete of the secondary lining solidifies, contract the first hydraulic cylinder through the hydraulic pump station, and the first hydraulic cylinder folds a number of end formworks to complete the disassembly of the end formwork, making the installation and disassembly of the end formwork more convenient, and then move the pedestal to the set position of the end formwork of the next section of secondary lining.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] The first hydraulic cylinder is used to unfold and fold the end formwork, making the installation and disassembly of the end formwork more convenient;

[0035] The second hydraulic cylinder tightly abuts against the connecting rod, so that the connecting rod between two adjacent first hydraulic cylinders is subjected to a pressing force, making it not easy for the end formwork to fold under the extrusion of the concrete;

[0036] By threadedly connecting an annular reinforcing steel ring to the end formwork, the lateral stiffness and longitudinal stiffness of the end formwork are improved, making the end formwork not easily deformed during the process of being extruded by concrete. Description of the Drawings

[0037] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0038] Figure 2 is Figure 1 an enlarged view of part A in

[0039] Figure 3 is Figure 1 an enlarged view of part B in

[0040] Figure 4 is a schematic structural diagram of the end formwork in a folded state.

[0041] Description of the Reference Numerals:

[0042] 1, pedestal; 11, support frame; 12, moving wheels; 2, hydraulic assembly; 21, first hydraulic cylinder; 22, second hydraulic cylinder; 221, rubber pad; 23, third hydraulic cylinder; 24, hydraulic pump station; 3, end formwork; 31, sealing strip; 4, hinge; 41, hinge rod; 42, connecting rod; 5, reinforcing steel ring; 51, reinforcing rib. Detailed Embodiment

[0043] The following will further elaborate on the present application in conjunction with the attached Figures 1-4 drawings.

[0044] An embodiment of the present application discloses an integrally formed steel end formwork for hydraulic jacking of the secondary lining of a highway tunnel. Referring to Figure 1 , the integrally formed steel end formwork for hydraulic jacking of the secondary lining of a highway tunnel is placed on the ground and used to seal the end face of the secondary lining, including a pedestal 1, a hydraulic assembly 2, and an end formwork 3. The hydraulic assembly 2 is connected to the pedestal 1, and a plurality of end formworks 3 are provided. All the plurality of end formworks 3 are connected to the hydraulic assembly 2, and the hydraulic assembly 2 is used to expand or fold the plurality of end formworks 3. During use, the pedestal 1 is transported to the set position, and then the plurality of end formworks 3 are expanded through the hydraulic assembly 2. After the secondary lining is completed, the plurality of end formworks 3 are folded through the hydraulic assembly 2, thereby making the installation and disassembly of the end formwork 3 more convenient and fast.

[0045] Referring to Figure 1 , the pedestal 1 is a horizontally arranged rectangular block, and a plurality of moving wheels 12 are symmetrically and rotatably arranged on both sides in the length direction. A support frame 11 is fixedly arranged on the top surface of the pedestal 1.

[0046] Referring to Figure 1, several end templates 3 are vertically arranged and located between the pedestal 1 and the secondary lining concrete. The end templates 3 are in the shape of sector ring plates. Several end templates 3 are adapted to the end face of the secondary lining. The sides of the two end templates 3 closest to the ground among several end templates 3 are adapted to and abutted against the ground. The end templates 3 are made of steel.

[0047] Refer to Figure 2 , sealing rubber strips 31 are fixedly connected to the mutually approaching sides of adjacent two end templates 3. The sealing rubber strips 31 are in strip shape, and the length direction of the sealing rubber strips 31 is the same as the length direction of the side of the end template 3. Adjacent two sealing rubber strips 31 are in a tightly abutted state.

[0048] Refer to Figure 1 and Figure 2 , hinge members 4 are arranged between adjacent two end templates 3. The hinge members 4 are located on the side of the end template 3 close to the pedestal 1. The hinge members 4 include hinge rods 41 and connecting rods 42. A plurality of hinge rods 41 are arranged along the length direction of the sealing rubber strip 31. The hinge rods 41 are long rods with a bent middle part. One end of the hinge rod 41 is hinged to one end template 3, and the other end of the hinge rod 41 is hinged to the other end template 3. The bending direction of the hinge rod 41 faces the end template 3. The connecting rod 42 is located on the side of the hinge rod 41 away from the end template 3. The connecting rod 42 is in long rod shape, and the length direction is the same as the length direction of the sealing rubber strip 31. The connecting rod 42 is fixedly connected to a plurality of hinge rods 41.

[0049] Refer to Figure 1 and Figure 2 , the hydraulic component 2 includes a first hydraulic cylinder 21, a second hydraulic cylinder 22, a third hydraulic cylinder 23 and a hydraulic pump station 24. A plurality of first hydraulic cylinders 21 are arranged and are all located on the side of the end template 3 close to the pedestal 1. A plurality of first hydraulic cylinders 21 are all inclined. The fixed end of the first hydraulic cylinder 21 is hinged to the support frame 11, and the movable end is hinged to the connecting rod 42. There is a connecting rod 42 spaced between adjacent two first hydraulic cylinders 21. The hydraulic pump station 24 is fixedly arranged on the top surface of the pedestal 1 and is located on the side of the support frame 11 away from the end template 3. The hydraulic pump station 24 is connected to the first hydraulic cylinder 21.

[0050] During use, the pedestal 1 is pushed. Under the action of the moving wheels 12, the pedestal 1 moves to the set position of the end formwork 3. The hydraulic pump station 24 is started, and the movable end of the first hydraulic cylinder 21 is driven by the hydraulic pump station 24 to extend. The movable end of the first hydraulic cylinder 21 pushes the connecting rod 42 to unfold several end formworks 3 hinged by the hinge rods 41, and the end formworks 3 are adapted to the end face of the secondary lining, thereby completing the installation of the end formworks 3. When it is necessary to disassemble the end formworks 3, the movable end of the first hydraulic cylinder 21 is retracted through the hydraulic pump station 24, and at the same time, several end formworks 3 are folded accordingly, thereby completing the disassembly of the end formworks 3, making it convenient to install and disassemble the end formworks 3.

[0051] Refer to Figure 1 and Figure 3 , several second hydraulic cylinders 22 are provided, and several second hydraulic cylinders 22 are all horizontally arranged. The second hydraulic cylinders 22 are located between adjacent two first hydraulic cylinders 21. The fixed end of the second hydraulic cylinder 22 is fixedly connected to the support frame 11, and the movable end abuts on the connecting rod 42 spaced between adjacent two first hydraulic cylinders 21. The second hydraulic cylinders 22 are connected to the hydraulic pump station 24.

[0052] Refer to Figure 1 , the second hydraulic cylinders 22 are also located on the side of the end formwork 3 close to the ground, and the movable ends abut on the side of the end formwork 3 close to the pedestal 1.

[0053] Refer to Figure 1 and Figure 3 , a rubber pad 221 is fixedly connected to the movable end of the second hydraulic cylinder 22. The rubber pad 221 on the second hydraulic cylinder 22 located between adjacent two first hydraulic cylinders 21 is in close contact with the connecting rod 42, and the rubber pad 221 on the second hydraulic cylinder located on the side of the end formwork 3 close to the ground is in close contact with the side of the end formwork 3 close to the pedestal 1.

[0054] During use, after the end formwork 3 is fully unfolded, the movable end of the second hydraulic cylinder 22 is driven by the hydraulic pump station 24 to extend and is in close contact with the connecting rod 42 and the end formwork 3, so that the end formwork 3 is in a stable state and is not likely to fold during the process of pouring concrete.

[0055] The folded state of the end formwork is as Figure 4 shown.

[0056] Refer to Figure 1 , several third hydraulic cylinders 23 are vertically arranged and are respectively located at the four top corners of the pedestal 1. The fixed end of the third hydraulic cylinder 23 is fixedly connected to the pedestal 1, and the movable end of the third hydraulic cylinder 23 abuts on the ground. The third hydraulic cylinders 23 are connected to the hydraulic pump station 24. When the movable end of the third hydraulic cylinder 23 is in the fully extended state, there is a gap between the moving wheels 12 and the ground. When the movable end of the third hydraulic cylinder is in the fully retracted state, the moving wheels 12 abut on the ground.

[0057] During use, after the pedestal 1 moves to the set position, the third hydraulic cylinder 23 is driven by the hydraulic pump station 24. The movable end of the third hydraulic cylinder 23 extends until the movable end of the third hydraulic cylinder 23 abuts against the ground, separating the moving wheels 12 from the ground, so that the pedestal 1 is in a stable state and is not prone to displacement when the end formwork 3 is subjected to the pressure of concrete.

[0058] Refer to Figure 1 , on the side of the end formwork 3 close to the pedestal 1, a number of annular reinforcing steel rings 5 are connected by threads. The number of reinforcing steel rings 5 is arranged along the arc edge of the end formwork 3. A cross-shaped reinforcing rib 51 is fixedly arranged inside the reinforcing steel ring 5.

[0059] During use, after the end formwork 3 is fully unfolded, a number of reinforcing steel rings 5 are connected to the side of the end formwork 3 close to the pedestal 1 by threads, thereby improving the lateral stiffness and longitudinal stiffness of the end formwork 3.

[0060] The implementation principle of a kind of integral steel end formwork with hydraulic jacking for the secondary lining of highway tunnels in the embodiment of the present application is as follows: During use, the pedestal 1 is moved to the set position of the end formwork 3 through the moving wheels 12. The hydraulic pump station 24 is started, and the hydraulic pump station 24 drives the third hydraulic cylinder 23. The third hydraulic cylinder 23 jacks the pedestal 1 and the moving wheels 12 off the ground. Then, the hydraulic pump station 24 drives a number of first hydraulic cylinders 21. The first hydraulic cylinders 21 push the connecting rod 42 to move, and the connecting rod 42 drives the articulated rod 41 to move. Under the action of a number of first hydraulic cylinders 21, a number of end formworks 3 are unfolded. Then, the hydraulic pump station 24 drives the second hydraulic cylinder 22, and the second hydraulic cylinder 22 jacks the connecting rod 42 and the end formwork 3 tightly, making the end formwork 3 more stable during use. Then, the reinforcing steel ring 5 is connected to the end formwork 3 by threads, thus completing the installation of the end formwork 3;

[0061] After the secondary lining is completed, first remove the reinforcing steel ring 5 from the end formwork 3, retract the second hydraulic cylinder 22 through the hydraulic pump station 24, then retract the first hydraulic cylinder 21. At the same time, the end formwork 3 folds along with the first hydraulic cylinder 21. Then, retract the third hydraulic cylinder 23 through the hydraulic pump station 24 until the moving wheels 12 abut against the ground, thus completing the disassembly of the end formwork 3, making the installation and disassembly of the end formwork 3 more convenient and fast.

[0062] The embodiment of the present application discloses a construction method for an integral steel end formwork with hydraulic jacking for the secondary lining of highway tunnels, including the following steps:

[0063] Initial support leveling: Check the flatness of the initial support of the tunnel, and level the unqualified positions by shotcreting.

[0064] Positioning of the pedestal 1: Move the pedestal 1 of the bearing end formwork 3 and the hydraulic components 2 to the set position of the end formwork 3 through the moving wheels 12;

[0065] Fixing the pedestal 1: Start the hydraulic pump station 24, and the hydraulic pump station 24 drives a number of third hydraulic cylinders 23. The number of third hydraulic cylinders 23 jack up the pedestal 1 and the moving wheels 12 from the bottom surface, so that the pedestal 1 is fixed to the ground;

[0066] Unfolding the end formwork 3: The hydraulic pump station 24 drives a number of first hydraulic cylinders 21 to fully unfold a number of end formworks 3 and form a fan-shaped ring adapted to the end face of the secondary lining, completing the installation of the end formwork 3;

[0067] Tightening the end formwork 3: The hydraulic pump station 24 drives the movable ends of a number of second hydraulic cylinders 22 to tightly abut against the connecting rod 42;

[0068] Installing the strengthening steel ring 5: Thread a number of strengthening steel rings 5 onto the end formwork 3;

[0069] Contracting the end formwork 3: After a section of secondary lining is completed, first contract the movable ends of the second hydraulic cylinders 22 to separate the second hydraulic cylinders 22 from the connecting rod 42, and then contract a number of first hydraulic cylinders 21 through the hydraulic pump station 24. The number of first hydraulic cylinders 21 drives a number of end formworks 3 to fold, thus completing the disassembly of the end formwork 3;

[0070] Moving the pedestal 1: Contract the third hydraulic cylinders 23 through the hydraulic pump station 24 until the moving wheels 12 abut against the ground, and move the pedestal 1 to the set position of the end formwork 3 of the next section of secondary lining through the moving wheels 12.

[0071] During construction, first detect the flatness of the initial support, level the uneven positions of the initial support by shotcreting, and then move the pedestal 1 to the set position through the moving wheels 12 according to the set position of the end formwork 3. Then start the hydraulic pump station 24, and the hydraulic pump station 24 drives a number of third hydraulic cylinders 23. The number of third hydraulic cylinders 23 jack up the pedestal 1 and the moving wheels 12 and separate the moving wheels 12 from the ground, thus completing the positioning and fixing of the pedestal 1; then drive a number of first hydraulic cylinders 21 through the hydraulic pump station 24, and the number of first hydraulic cylinders 21 drives a number of end formworks 3 to unfold, and then drive the second hydraulic cylinders 22 through the hydraulic pump station 24, and the second hydraulic cylinders 22 tighten the end formwork 3, thus completing the unfolding and tightening of the end formwork 3;

[0072] Before the secondary lining, the reinforcing steel ring 5 is threadedly connected to the end formwork 3, and after the secondary lining is completed, the reinforcing steel ring 5 is removed; the second hydraulic cylinder 22 is first retracted by driving of the hydraulic pump station 24, and then the first hydraulic cylinder 21 is retracted by the hydraulic pump station 24. Meanwhile, several end formworks 3 are folded and contracted, so as to complete the disassembly of the end formworks 3. Then, the third hydraulic cylinder 23 is retracted by driving of the hydraulic pump station 24, so that the moving wheels 12 are in contact with the ground, and the pedestal 1 is moved to the set position of the next section of the secondary lining end formwork 3 through the moving wheels 12.

[0073] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A hydraulic jacking integral steel end form for the secondary lining of a highway tunnel, which is used to seal the end face of the secondary lining, is characterized in that It includes a pedestal (1), a hydraulic component (2) and end formworks (3). There are several end formworks (3), all of which are fan-shaped rings. An articulated member (4) is provided between two adjacent end formworks (3). The articulated member (4) is used to articulate two adjacent end formworks (3). The several end formworks (3) are adapted to the end face of the secondary lining. The adjacent two end formworks (3) are in contact with each other on the side close to each other. The hydraulic component (2) includes a first hydraulic cylinder (21) and a hydraulic pump station (24). There are several first hydraulic cylinders (21), and all of them are connected to the hydraulic pump station (24). The fixed end of the first hydraulic cylinder (21) is articulated with the pedestal (1), and the movable end of the first hydraulic cylinder (21) is connected to the articulated member (4). There is an articulated member (4) spaced between two adjacent first hydraulic cylinders (21); The articulated member (4) includes an articulated rod (41) and a connecting rod (42). There are several articulated rods (41), and all of them are located at the contact position of two adjacent end formworks (3). The middle of the articulated rod (41) is bent, and the bending direction is towards the end formwork (3). One end of the articulated rod (41) is articulated with one end formwork (3), and the other end is articulated with the other end formwork (3). The several articulated rods (41) and the connecting rod (42) are fixedly connected, and the connecting rod (42) is articulated with the movable end of the first hydraulic cylinder (21); Sealing rubber strips (31) are fixedly arranged on the side where the adjacent two end formworks (3) are close to each other, and the sealing rubber strips (31) are in a compressed state; The end formwork (3) is made of steel; The hydraulic component (2) further includes a second hydraulic cylinder (22). There are several second hydraulic cylinders (22), and all of them are connected to the hydraulic pump station (24). The several second hydraulic cylinders (22) are all located between two adjacent first hydraulic cylinders (21). A support frame (11) is fixedly arranged on the top surface of the pedestal (1). The fixed end of the second hydraulic cylinder (22) is fixedly connected to the support frame (11), and the movable end is in close contact with the connecting rod (42).

2. The integral steel end formwork for the second lining of a highway tunnel with hydraulic jacking according to claim 1, characterized in that, A rubber pad (221) is arranged between the second hydraulic cylinder (22) and the connecting rod (42), and the rubber pad (221) is fixedly connected to the movable end of the second hydraulic cylinder (22).

3. The integral steel end formwork with hydraulic jacking for the secondary lining of highway tunnels according to claim 1, wherein, A ring-shaped reinforcing steel ring (5) is threadedly connected to the side of the end formwork (3) where the articulated rod (41) is articulated. A cross-shaped reinforcing rib (51) is fixedly arranged inside the reinforcing steel ring (5).

4. The integral steel end formwork with hydraulic jacking for the secondary lining of highway tunnels according to claim 1, characterized in that, The hydraulic component (2) further includes a third hydraulic cylinder (23). There are several third hydraulic cylinders (23). The fixed end of the third hydraulic cylinder (23) is fixedly connected to the pedestal (1), and the movable end of the third hydraulic cylinder (23) is used to contact the ground.

5. The integral steel end formwork for the secondary lining of a highway tunnel with hydraulic jacking according to claim 1, characterized in that, Several moving wheels (12) are rotatably arranged on the pedestal (1).

6. A construction method of an integral steel end formwork with hydraulic lifting for the secondary lining of a highway tunnel according to any one of claims 1-5, characterized in that, It includes the following steps: Initial support leveling: Check the flatness of the initial support of the tunnel, and level the unqualified positions by spraying concrete; Pedestal (1) positioning: Move the pedestal (1) carrying the end formwork (3) and the hydraulic component (2) to the set position of the end formwork (3). Expansion end formwork (3): Start the hydraulic pump station (24), and the hydraulic pump station (24) drives several first hydraulic cylinders (21) to fully expand several end formworks (3) so that they are adapted to the end face of the secondary lining, completing the installation of the end formwork (3); Contraction end formwork (3): After a section of secondary lining is completed, fold and contract several end formworks (3) through the hydraulic pump station (24), complete the disassembly of the end formwork (3), and move the pedestal (1) to the set position of the end formwork (3) of the next section of secondary lining.

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