Tunnel multi-section formwork supporting device

Abstract

The invention discloses a tunnel multi-section formwork supporting device, relates to the technical field of section supporting, and provides the technical scheme of the tunnel multi-section formwork supporting device which is characterized in that the tunnel multi-section formwork supporting device comprises a base, a main hydraulic telescopic rod is installed on the base, and a supporting plate is installed at the end of the main hydraulic telescopic rod; during use, the base is fixed to the ground, the main hydraulic telescopic rods are started, the main hydraulic telescopic rods drive the supporting plates to extend to make contact with the wall face of the tunnel and then stop, then the prefabricated arc plates and the supporting plates are assembled, and a complete arc face is formed to support the interior of the tunnel. The supporting mode can adjust different extension lengths of the main hydraulic telescopic rod according to different sizes of tunnel sections, can be suitable for supporting a multi-section formwork, is convenient and rapid, and improves the construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of cross-section support technology, specifically to a multi-section formwork support device for tunnels. Background Technology

[0002] Tunnel cross-section support is a key technical system for maintaining the stability of the surrounding rock and ensuring structural safety during tunnel construction. It mainly includes two stages: temporary support and permanent lining. Temporary support is quickly constructed after excavation to control the deformation of the surrounding rock, prevent collapse, and facilitate subsequent construction work. The support system needs to be dynamically adjusted according to geological conditions—advanced pipe roof or grouting reinforcement is used for soft strata, while support can be simplified for hard rock sections.

[0003] Under current technology, scaffolding and steel pipes are mostly used for simple support, which is cumbersome to install and not very safe. When encountering walls with multiple sections and different sizes, the support becomes even more difficult. A template-based support device is needed that is easy to move and assemble, has high safety, and can be applied to the support needs of multiple sections. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-section formwork support device for tunnels to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a base for a tunnel multi-section template support device, wherein a fixing hole is provided on the base, a hydraulic mounting seat is installed on the base, five main hydraulic telescopic rods are installed on the hydraulic mounting seat, a support plate is installed at the end of the main hydraulic telescopic rod, two adjacent support plates are connected by a precast arc plate, a first connecting column is installed on the support plate, and a second connecting column is installed at both ends of the precast arc plate, and the first connecting column and the second connecting column are connected by a connecting plate.

[0006] As a preferred technical solution, except for the two in the horizontal direction, the included angle between any two adjacent main hydraulic telescopic rods is 45°.

[0007] As a preferred technical solution, the radius of the precast arc plate is prepared in advance according to the tunnel cross-section radius, the thickness of the precast arc plate is the same as the thickness of the support plate, and the arc of the precast arc plate is the shortest arc of the adjacent support plate.

[0008] As a preferred technical solution, the base is provided with a stabilizing component and a compensating component. The stabilizing component is deployed by the operation of the main hydraulic telescopic rod, and the compensating component is triggered by the deformation of the prefabricated arc plate.

[0009] As a preferred technical solution, the stabilizing component includes a mounting plate, a slide rail, a slider, a vertical outer rod, a vertical inner rod, a vertical screw hole, and a fixing nut;

[0010] The base has symmetrical mounting plates on both sides. Each mounting plate has two slide rails, and each slide rail has a slider. Each slider has a vertical outer rod. Two vertical inner rods are symmetrically mounted on two support plates that are inclined to the base. The vertical inner rods are perpendicular to the base and are nested inside the vertical outer rods. The vertical outer rods have several vertical screw holes, and fixing nuts are installed in the screw holes.

[0011] As a preferred technical solution, the stabilizing component further includes a horizontal outer rod, a horizontal inner rod, and a horizontal screw hole;

[0012] On the same side, one of the two vertical outer rods is equipped with a horizontal inner rod, and the other is equipped with a horizontal outer rod. The horizontal outer rod is sleeved outside the horizontal inner rod, and several horizontal screw holes are opened on the horizontal outer rod. Fixing nuts are installed on the horizontal screw holes.

[0013] As a preferred technical solution, the compensation component includes a compensation hydraulic telescopic rod, a top plate, a mounting hole, a trigger mounting block, a sleeve, a slide rod, a contact block, an air inlet, a pressure valve, a cylindrical T-shaped platform, a trigger switch, a reset spring, an exhaust hole, and an end top block;

[0014] Four compensating hydraulic telescopic rods are installed on the hydraulic mounting base. A top plate is installed at the end of each compensating hydraulic telescopic rod, and mounting holes are provided on the top plate. A trigger mounting block is installed on each compensating hydraulic telescopic rod. The mounting holes and trigger mounting blocks are connected via sleeves. A sliding rod is slidably installed inside the sleeve. A contact block is installed at the end of the sliding rod. A pressure valve is installed inside the trigger mounting block. A cylindrical T-shaped platform is slidably installed inside the trigger mounting block. The cylindrical T-shaped platform is connected to the trigger mounting block via a return spring. A trigger switch is installed inside the trigger mounting block, located below the cylindrical T-shaped platform. An air inlet is provided on the side of the sleeve closest to the trigger mounting block. The trigger switch is electrically connected to the auxiliary hydraulic telescopic rod.

[0015] As a preferred technical solution, the highest surface of the sleeve is flush with the upper surface of the top plate, and the contact block and the end block have the same radius.

[0016] As a preferred technical solution, the extension line of the compensating hydraulic telescopic rod intersects the midpoint of the precast arc plate, and the width of the top plate is less than the shortest distance between the two horizontal outer rods.

[0017] As a preferred technical solution, the trigger mounting block is provided with an exhaust hole, and the position of the exhaust hole is lower than that of the pressure valve.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. Adjust the extension length of the main hydraulic telescopic rod according to the different dimensions of the tunnel cross section to ensure that it can be used for multi-section formwork support, which is convenient, quick and easy and improves construction efficiency.

[0020] 2. The installation of stabilizing components can provide further support for the horizontal and vertical directions of the entire device, thereby increasing its support strength.

[0021] 3. The installation of compensation components can prevent further concavity and deformation of the precast curved slab, thus preventing damage to the precast curved slab and tunnel collapse, ensuring the normal progress and safety of tunnel construction. Attached Figure Description

[0022] Figure 1 This is a first-view structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the second perspective structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the third-view structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the compensation component structure of the present invention;

[0026] Figure 5 This is a cross-sectional structural diagram of the compensation component of the present invention;

[0027] Figure 6 For the present invention Figure 3 Enlarged structural diagram at point A;

[0028] Figure 7 For the present invention Figure 5 Enlarged structural diagram at point B;

[0029] Figure 8 This is a schematic diagram of the installation structure of the present invention in a tunnel.

[0030] In the diagram: 1. Base; 2. Fixing hole; 3. Hydraulic mounting base; 4. Main hydraulic telescopic rod; 5. Support plate; 6. Precast arc plate; 7. First connecting column; 8. Second connecting column; 9. Connecting plate; 12. Tunnel;

[0031] 10. Stabilizing component; 1001. Mounting plate; 1002. Slide rail; 1003. Slider; 1004. Vertical outer rod; 1005. Vertical inner rod; 1006. Vertical screw hole; 1007. Horizontal outer rod; 1008. Horizontal inner rod; 1009. Horizontal screw hole; 1010. Fixing nut;

[0032] 11. Compensation component; 1101. Compensating hydraulic telescopic rod; 1102. Top plate; 1103. Mounting hole; 1104. Trigger mounting block; 1105. Sleeve; 1106. Slide rod; 1107. Contact block; 1108. Air inlet; 1109. Pressure valve; 1110. Columnar T-shaped platform; 1111. Trigger switch; 1112. Return spring; 1113. Exhaust port; 1114. End top block. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example: Figures 1-3 As shown, the present invention provides a technical solution for a tunnel multi-section formwork support device, characterized in that: the tunnel multi-section formwork support device includes a base 1, a fixing hole 2 is provided on the base 1, a hydraulic mounting seat 3 is installed on the base 1, five main hydraulic telescopic rods 4 are installed on the hydraulic mounting seat 3, a support plate 5 is installed at the end of the main hydraulic telescopic rod 4, two adjacent support plates 5 are connected by a precast arc plate 6, a first connecting column 7 is installed on the support plate 5, and a second connecting column 8 is installed at both ends of the precast arc plate 6, and the first connecting column 7 and the second connecting column 8 are connected by a connecting plate 9.

[0035] When using this multi-section tunnel formwork support device, the base 1 is fixed to the ground, and the main hydraulic telescopic rod 4 is activated. The main hydraulic telescopic rod 4 extends until it drives the support plate 5 to contact the tunnel wall and then stops. Then, the precast arc plate 6 is assembled with the support plate 5 to form a complete arc surface to support the inside of the tunnel. The main hydraulic telescopic rod 4 drives the support plate 5 to extend and form the framework of the arc surface. This support method can adjust the extension length of the main hydraulic telescopic rod 4 according to different dimensions of the tunnel cross section to ensure that it can be used for multi-section formwork support, which is convenient, quick and improves construction efficiency.

[0036] Except for the two horizontal ones, the included angle between any two adjacent main hydraulic telescopic rods 4 is 45°.

[0037] The main hydraulic telescopic rod 4 and the support plate 5 form the frame of the entire support device, so they need to have a certain load-bearing capacity. The spacing between each main hydraulic telescopic rod 4 is the same, which is conducive to the uniform force on the entire support device. The structure is reasonable, the load-bearing capacity is better, and the support strength of the device can be improved.

[0038] The radius of the precast arc plate 6 is prepared in advance according to the radius of the tunnel cross section. The thickness of the precast arc plate 6 is the same as the thickness of the support plate 5. The curvature of the precast arc plate 6 is the shortest curvature of the adjacent support plate 5.

[0039] The different precast arc plates 6 required for different cross sections will result in different arc lengths between each support plate 5, and the required size of the precast arc plates 6 will also change. Therefore, before use, it is necessary to prepare precast arc plates 6 of corresponding size according to the construction requirements in advance to ensure that the size of the precast arc plates 6 is sufficient to connect the support plates 5 and fit with the tunnel wall, thereby further improving the support strength and adapting to the support requirements of multiple cross sections.

[0040] The base 1 is equipped with a stabilizing component 10 and a compensating component 11. The stabilizing component 10 is deployed by the operation of the main hydraulic telescopic rod 4, and the compensating component 11 is triggered by the deformation of the precast arc plate 6.

[0041] like Figures 1-3 As shown, the stabilizing component 10 includes a mounting plate 1001, a slide rail 1002, a slider 1003, a vertical outer rod 1004, a vertical inner rod 1005, a vertical screw hole 1006, and a fixing nut 1010;

[0042] Each of the two mounting plates 1001 is symmetrically mounted on both sides of the base 1. Each mounting plate 1001 has two slide rails 1002 symmetrically mounted on it. Each slide rail 1002 has a slider 1003 symmetrically mounted on it. Each slider 1003 has a vertical outer rod 1004 mounted on it. Each of the two support plates 5, which are mounted at an angle to the base 1, has two vertical inner rods 1005 symmetrically mounted on it. The vertical inner rods 1005 are perpendicular to the base 1 and are nested inside the vertical outer rods 1004. Each vertical outer rod 1004 has several vertical screw holes 1006, and each screw hole 1006 has a fixing nut 1010 fitted onto it.

[0043] Initially, the fixing nut 1010 is loose, and the vertical inner rod 1005 can slide along the vertical outer rod 1004. When the main hydraulic telescopic rod 4 extends, it will drive the support plate 5 to move away from the base 1. At this time, the vertical inner rod 1005 fixed to the support plate 5 will move synchronously with the movement of the support plate 5. Since the vertical inner rod 1005 is sleeved inside the vertical outer rod 1004, the movement of the vertical inner rod 1005 will drive the vertical outer rod 1004 to move synchronously in the horizontal direction. After the main hydraulic telescopic rod 4 has extended, the worker needs to tighten the fixing nut 1010 on the vertical screw hole 1006. The fixing nut 1010 will press against the vertical inner rod 1005. At this time, the vertical inner rod 1005 and the vertical outer rod 1004 are fixed together. The vertical inner rod 1005 and the vertical outer rod 1004 add a vertical support to the support plate 5, which can enhance the vertical support strength of the support device.

[0044] The stabilizing component 10 also includes a horizontal outer rod 1007, a horizontal inner rod 1008, and a horizontal screw hole 1009;

[0045] On the same side, one of the two vertical outer rods 1004 is equipped with a horizontal inner rod 1008, and the other is equipped with a horizontal outer rod 1007. The horizontal outer rod 1007 is sleeved outside the horizontal inner rod 1008. Several horizontal screw holes 1009 are opened on the horizontal outer rod 1007, and fixing nuts 1010 are installed on the horizontal screw holes 1009.

[0046] In the initial state, the fixing nut 1010 on the horizontal screw hole 1009 is loose, and the horizontal inner rod 1008 can slide along the horizontal outer rod 1007. When the vertical outer rod 1004 moves away from the base 1, it will pull the horizontal inner rod 1008 to move synchronously along the horizontal outer rod 1007. After the main hydraulic telescopic rod 4 has extended, the worker needs to tighten the fixing nut 1010 on the horizontal screw hole 1009. At this time, the horizontal outer rod 1007 and the horizontal inner rod 1008 can no longer slide relative to each other, forming a fixed support rod, which provides horizontal support for the vertical outer rod 1004 located on both sides of the base 1. On the one hand, it can provide horizontal support force for the entire support device, which is conducive to the transmission and dispersion of force and improves the support capacity. On the other hand, it can prevent the vertical outer rod 1004 from sliding along the slide rail 1002 when the support plate 5 is under force. The horizontal outer rod 1007 and the horizontal inner rod 1008 play a fixing role, further improving the support strength.

[0047] like Figures 1-7 As shown, the compensation assembly 11 includes a compensation hydraulic telescopic rod 1101, a top plate 1102, a mounting hole 1103, a trigger mounting block 1104, a sleeve 1105, a slide rod 1106, a contact block 1107, an air inlet 1108, a pressure valve 1109, a cylindrical T-shaped platform 1110, a trigger switch 1111, a return spring 1112, an exhaust hole 1113, and an end top block 1114;

[0048] Four compensating hydraulic telescopic rods 1101 are mounted on the hydraulic mounting base 3. A top plate 1102 is mounted at the end of each compensating hydraulic telescopic rod 1101. Mounting holes 1103 are provided on the top plate 1102. Trigger mounting blocks 1104 are mounted on each compensating hydraulic telescopic rod 1101. The mounting holes 1103 and trigger mounting blocks 1104 are connected via a sleeve 1105. A sliding rod 1106 is slidably mounted inside the sleeve 1105. A contact block 1107 is mounted at the end of the sliding rod 1106. The aforementioned trigger mounting blocks 1104... A pressure valve 1109 is installed inside the 4. A cylindrical T-shaped platform 1110 is slidably installed inside the trigger mounting block 1104. The cylindrical T-shaped platform 1110 and the trigger mounting block 1104 are connected by a return spring 1112. A trigger switch 1111 is installed inside the trigger mounting block 1104. The trigger switch 1111 is located below the cylindrical T-shaped platform 1110. An air inlet 1108 is opened on the side of the sleeve 1105 near the trigger mounting block 1104. The trigger switch 1111 is electrically connected to the compensating hydraulic telescopic rod 1101.

[0049] After the entire support device is assembled, the tunnel wall will be sprayed with concrete. The solidification of the concrete or the collapse of the layer will put pressure on the precast arc plate 6. Since there is a certain distance between the support plates 5, the precast arc plate 6 may be severely deformed or the connection with the support plate 5 may fall off.

[0050] After the support device is installed, gas is injected into the sleeve 1105 through the air inlet 1108, pushing the slide rod 1106 to bring the contact block 1107 into contact with the precast arc plate 6. Then the air inlet 1108 is closed. When the precast arc plate 6 deforms and indents towards the base 1, the precast arc plate 6 will push the contact block 1107 and the slide rod 1106 towards the base 1. The slide rod 1106 slides along the sleeve 1105 and compresses the gas inside the sleeve 1105. When the deformation of the precast arc plate 6 exceeds the expected value, the gas pressure inside the sleeve 1105 will also increase. As it rises to a certain vertical position, the pressure valve 1109 opens, and the gas passes through the pressure valve 1109 to push the cylindrical T-shaped platform 1110. The bottom of the cylindrical T-shaped platform 1110 contacts the trigger switch 1111, which controls the extension of the compensating hydraulic telescopic rod 1101. The top plate 1102 and the end block 1114 at the end of the compensating hydraulic telescopic rod 1101 will form a new support for the precast arc plate 6, which can prevent the precast arc plate 6 from further sinking and deforming, prevent the precast arc plate 6 from being damaged and the tunnel from collapsing, and ensure the normal progress and safety of tunnel construction.

[0051] The highest surface of the sleeve 1105 is flush with the upper surface of the top plate 1102, and the contact block 1107 and the end block 1114 have the same radius.

[0052] When the end block 1114 contacts the precast top plate 1102, since the contact block 1107 and the end block 1114 have the same radius, the contact block 1107 will not be damaged due to excessive pressure. At the same time, the contact block 1107 can also play the same supporting role as the end block 1114.

[0053] The extension line of the compensating hydraulic telescopic rod 1101 intersects the midpoint of the precast arc plate 6, and the width of the top plate 1102 is less than the shortest distance between the two horizontal outer rods 1007.

[0054] The middle position of the precast arc plate 6 is the most prone to deformation. Therefore, when the compensating hydraulic telescopic rod 1101 extends, it supports the middle position of the precast arc plate 6, further enhancing the auxiliary support effect of the precast arc plate 6.

[0055] The trigger mounting block 1104 has an exhaust port 1113, which is located below the pressure valve 1109.

[0056] When the cylindrical T-shaped stage 1110 contacts the trigger switch 1111 to activate the compensating hydraulic telescopic rod 1101, the gas inside the sleeve 1105 needs to be released to the outside to prevent the trigger switch 1111 from being continuously compressed, which could damage the trigger switch 1111 and ensure the sensitivity and service life of the trigger switch 1111.

[0057] Working principle of the invention:

[0058] When using this multi-section tunnel formwork support device, the base 1 is fixed to the ground, and the main hydraulic telescopic rod 4 is activated. The main hydraulic telescopic rod 4 extends until it drives the support plate 5 to contact the tunnel wall and then stops. Then, the precast arc plate 6 is assembled with the support plate 5 to form a complete arc surface to support the inside of the tunnel. The main hydraulic telescopic rod 4 drives the support plate 5 to extend and form the framework of the arc surface. This support method can adjust the extension length of the main hydraulic telescopic rod 4 according to different dimensions of the tunnel cross section to ensure that it can be used for multi-section formwork support, which is convenient, quick and improves construction efficiency.

[0059] The main hydraulic telescopic rod 4 and the support plate 5 form the frame of the entire support device, so they need to have a certain load-bearing capacity. The spacing between each main hydraulic telescopic rod 4 is the same, which is conducive to the uniform force on the entire support device. The structure is reasonable, the load-bearing capacity is better, and the support strength of the device can be improved.

[0060] The different precast arc plates 6 required for different cross sections will result in different arc lengths between each support plate 5, and the required size of the precast arc plates 6 will also change. Therefore, before use, it is necessary to prepare precast arc plates 6 of corresponding size according to the construction requirements in advance to ensure that the size of the precast arc plates 6 is sufficient to connect the support plates 5 and fit with the tunnel wall, thereby further improving the support strength and adapting to the support requirements of multiple cross sections.

[0061] Initially, the fixing nut 1010 is loose, and the vertical inner rod 1005 can slide along the vertical outer rod 1004. When the main hydraulic telescopic rod 4 extends, it will drive the support plate 5 to move away from the base 1. At this time, the vertical inner rod 1005 fixed to the support plate 5 will move synchronously with the movement of the support plate 5. Since the vertical inner rod 1005 is sleeved inside the vertical outer rod 1004, the movement of the vertical inner rod 1005 will drive the vertical outer rod 1004 to move synchronously in the horizontal direction. After the main hydraulic telescopic rod 4 has extended, the worker needs to tighten the fixing nut 1010 on the vertical screw hole 1006. The fixing nut 1010 will press against the vertical inner rod 1005. At this time, the vertical inner rod 1005 and the vertical outer rod 1004 are fixed together. The vertical inner rod 1005 and the vertical outer rod 1004 add a vertical support to the support plate 5, which can enhance the vertical support strength of the support device.

[0062] In the initial state, the fixing nut 1010 on the horizontal screw hole 1009 is loose, and the horizontal inner rod 1008 can slide along the horizontal outer rod 1007. When the vertical outer rod 1004 moves away from the base 1, it will pull the horizontal inner rod 1008 to move synchronously along the horizontal outer rod 1007. After the main hydraulic telescopic rod 4 has extended, the worker needs to tighten the fixing nut 1010 on the horizontal screw hole 1009. At this time, the horizontal outer rod 1007 and the horizontal inner rod 1008 can no longer slide relative to each other, forming a fixed support rod, which provides horizontal support for the vertical outer rod 1004 located on both sides of the base 1. On the one hand, it can provide horizontal support force for the entire support device, which is conducive to the transmission and dispersion of force and improves the support capacity. On the other hand, it can prevent the vertical outer rod 1004 from sliding along the slide rail 1002 when the support plate 5 is under force. The horizontal outer rod 1007 and the horizontal inner rod 1008 play a fixing role, further improving the support strength.

[0063] After the support device is installed, gas is injected into the sleeve 1105 through the air inlet 1108, pushing the slide rod 1106 to bring the contact block 1107 into contact with the precast arc plate 6. Then the air inlet 1108 is closed. When the precast arc plate 6 deforms and indents towards the base 1, the precast arc plate 6 will push the contact block 1107 and the slide rod 1106 towards the base 1. The slide rod 1106 slides along the sleeve 1105 and compresses the gas inside the sleeve 1105. When the deformation of the precast arc plate 6 exceeds the expected value, the gas pressure inside the sleeve 1105 will also increase. As it rises to a certain vertical position, the pressure valve 1109 opens, and the gas passes through the pressure valve 1109 to push the cylindrical T-shaped platform 1110. The bottom of the cylindrical T-shaped platform 1110 contacts the trigger switch 1111, which controls the extension of the compensating hydraulic telescopic rod 1101. The top plate 1102 and the end block 1114 at the end of the compensating hydraulic telescopic rod 1101 will form a new support for the precast arc plate 6, which can prevent the precast arc plate 6 from further sinking and deforming, prevent the precast arc plate 6 from being damaged and the tunnel from collapsing, and ensure the normal progress and safety of tunnel construction.

[0064] When the end block 1114 contacts the precast top plate 1102, since the contact block 1107 and the end block 1114 have the same radius, the contact block 1107 will not be damaged due to excessive pressure. At the same time, the contact block 1107 can also play the same supporting role as the end block 1114.

[0065] The middle position of the precast arc plate 6 is the most prone to deformation. Therefore, when the compensating hydraulic telescopic rod 1101 extends, it supports the middle position of the precast arc plate 6, further enhancing the auxiliary support effect of the precast arc plate 6.

[0066] When the cylindrical T-shaped stage 1110 contacts the trigger switch 1111 to activate the compensating hydraulic telescopic rod 1101, the gas inside the sleeve 1105 needs to be released to the outside to prevent the trigger switch 1111 from being continuously compressed, which could damage the trigger switch 1111 and ensure the sensitivity and service life of the trigger switch 1111.

[0067] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A tunnel multi-section formwork support device, characterized in that: The tunnel multi-section template support device includes a base (1), a fixing hole (2) is provided on the base (1), a hydraulic mounting seat (3) is installed on the base (1), five main hydraulic telescopic rods (4) are installed on the hydraulic mounting seat (3), a support plate (5) is installed at the end of the main hydraulic telescopic rod (4), two adjacent support plates (5) are connected by a precast arc plate (6), a first connecting column (7) is installed on the support plate (5), and a second connecting column (8) is installed at both ends of the precast arc plate (6). The first connecting column (7) and the second connecting column (8) are connected by a connecting plate (9).

2. The tunnel multi-section formwork support device according to claim 1, characterized in that: Except for the two in the horizontal direction, the included angle between any two adjacent main hydraulic telescopic rods (4) is 45°.

3. The tunnel multi-section formwork support device according to claim 2, characterized in that: The radius of the precast arc plate (6) is prepared in advance according to the tunnel cross-section radius. The thickness of the precast arc plate (6) is the same as the thickness of the support plate (5). The arc of the precast arc plate (6) is the shortest arc of the adjacent support plate (5).

4. The tunnel multi-section formwork support device according to claim 2, characterized in that: The base (1) is provided with a stabilizing component (10) and a compensating component (11). The stabilizing component (10) is deployed by the operation of the main hydraulic telescopic rod (4), and the compensating component (11) is triggered by the deformation of the precast arc plate (6).

5. The tunnel multi-section formwork support device according to claim 4, characterized in that: The stabilizing component (10) includes a mounting plate (1001), a slide rail (1002), a slider (1003), a vertical outer rod (1004), a vertical inner rod (1005), a vertical screw hole (1006), and a fixing nut (1010); The base (1) is symmetrically equipped with mounting plates (1001) on both sides. Two slide rails (1002) are symmetrically installed on each of the two mounting plates (1001). Slider blocks (1003) are symmetrically installed on the slide rails (1002). Vertical outer rods (1004) are installed on the sliders (1003). Two vertical inner rods (1005) are symmetrically installed on the two support plates (5) that are inclined to the base (1). The vertical inner rods (1005) are perpendicular to the base (1). The vertical inner rods (1005) are nested inside the vertical outer rods (1004). Several vertical screw holes (1006) are opened on the vertical outer rods (1004). Fixing nuts (1010) are installed in the vertical screw holes (1006).

6. The tunnel multi-section formwork support device according to claim 5, characterized in that: The stabilizing component (10) also includes a horizontal outer rod (1007), a horizontal inner rod (1008), and a horizontal screw hole (1009); On the same side, one of the two vertical outer rods (1004) is equipped with a horizontal inner rod (1008), and the other is equipped with a horizontal outer rod (1007). The horizontal outer rod (1007) is sleeved on the horizontal inner rod (1008). Several horizontal screw holes (1009) are opened on the horizontal outer rod (1007), and fixing nuts (1010) are installed on the horizontal screw holes (1009).

7. The tunnel multi-section formwork support device according to claim 4, characterized in that: The compensation assembly (11) includes a compensation hydraulic telescopic rod (1101), a top plate (1102), a mounting hole (1103), a trigger mounting block (1104), a sleeve (1105), a slide rod (1106), a contact block (1107), an air inlet (1108), a pressure valve (1109), a cylindrical T-shaped platform (1110), a trigger switch (1111), a return spring (1112), an exhaust hole (1113), and an end top block (1114). Four compensating hydraulic telescopic rods (1101) are installed on the hydraulic mounting base (3). A top plate (1102) is installed at the end of each compensating hydraulic telescopic rod (1101). A mounting hole (1103) is provided on the top plate (1102). A trigger mounting block (1104) is installed on each compensating hydraulic telescopic rod (1101). The mounting hole (1103) and the trigger mounting block (1104) are connected by a sleeve (1105). A slide rod (1106) is slidably installed inside the sleeve (1105). A contact block (1107) is installed at the end of the slide rod (1106). The trigger mounting block (1104) is... 04) A pressure valve (1109) is installed inside. A cylindrical T-shaped platform (1110) is slidably installed inside the trigger mounting block (1104). The cylindrical T-shaped platform (1110) is connected to the trigger mounting block (1104) through a return spring (1112). A trigger switch (1111) is installed inside the trigger mounting block (1104). The trigger switch (1111) is located below the cylindrical T-shaped platform (1110). An air inlet (1108) is opened on the side of the sleeve (1105) near the trigger mounting block (1104). The trigger switch (1111) is electrically connected to the compensating hydraulic telescopic rod (1101).

8. The tunnel multi-section formwork support device according to claim 7, characterized in that: The highest surface of the sleeve (1105) is flush with the upper surface of the top plate (1102), and the contact block (1107) and the end block (1114) have the same radius.

9. The tunnel multi-section formwork support device according to claim 7, characterized in that: The extension line of the compensating hydraulic telescopic rod (1101) intersects the midpoint of the precast arc plate (6), and the width of the top plate (1102) is less than the shortest distance between the two horizontal outer rods (1007).

10. The tunnel multi-section formwork support device according to claim 7, characterized in that: The trigger mounting block (1104) is provided with an exhaust hole (1113), and the position of the exhaust hole (1113) is lower than that of the pressure valve (1109).

Images