Tunnel secondary lining concrete pouring mold structure

Abstract

The invention provides a tunnel secondary lining concrete pouring mold structure which comprises a mold plate trolley, a water stop belt, an end mold plate piece, a connecting base arranged at one end of a bottom mold plate and the bottom mold plate arranged on the mold plate trolley. Each end template piece comprises an inner end plate, a middle end plate, an outer end plate and two groups of crosspiece assemblies distributed in the circumferential direction of the bottom template, each crosspiece assembly comprises a connecting shaft and two groups of end head plate part connecting lugs which are distributed in the extending direction of the connecting shaft and are fixed on the connecting seat, and the rotating shaft is arranged in the connecting shaft and one group of end head plate part connecting lugs in a penetrating manner at the same time; the rotation stopping screw penetrates through the connecting shaft and the other set of end plate connecting lugs at the same time and then is connected with the separation stopping nut, the inner end plate and the middle end plate clamp the water stop belt, and the outer end plate abuts against the waterproof plate. The formwork has the advantage that secondary building is not needed, and the problem that time is wasted when an existing pouring tunnel secondary lining end formwork needs to be built on site every time is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel construction, and particularly relates to a tunnel secondary lining concrete pouring mold structure. BACKGROUND

[0002] In tunnel engineering construction, the secondary lining is a reinforced concrete structure, and concrete pouring is an important construction link. Therefore, a formwork trolley needs to be erected and arranged, and a bottom formwork is built on the formwork trolley. The bottom formwork is used for forming an inner circumferential surface of the tunnel secondary lining. An arc-shaped waterproof plate is laid on the inner circumferential surface of the tunnel bottom lining. One end of the bottom formwork is connected to the secondary lining that has been poured to achieve plugging, and the other end needs to be plugged with an end formwork to close the concrete pouring space. At present, the end formwork is mostly manually spliced on site by using wooden strips, plastic strips and other materials. The installation and disassembly process of the end formwork is complicated, and a large amount of time and manpower is consumed, which reduces the construction efficiency. The current steel end formwork is a fixed structure, and there are gaps of different sizes between the edges of the end formwork and the waterproof plates on the surface of the tunnel bottom lining, and there are also gaps between the end formwork and the water stop belts in the local inner part of the tunnel secondary lining, which causes the phenomenon of concrete leakage during pouring. SUMMARY

[0003] The first object of the present application aims to provide a tunnel secondary lining concrete pouring mold structure without the need for secondary construction, which solves the problem of time-consuming site construction of the existing pouring tunnel secondary lining end formwork.

[0004] The second object of the present application aims to further provide a tunnel secondary lining concrete pouring mold structure with good sealing effect, which solves the problem of concrete leakage of the existing pouring tunnel secondary lining end formwork.

[0005] In order to achieve the above object, the present application adopts the following technology: a tunnel secondary lining concrete pouring mold structure, comprising a mold trolley and a bottom mold plate arranged on the mold trolley, the bottom mold plate is used for forming the inner circumferential surface of the tunnel secondary lining, the inner circumferential surface of the tunnel bottom lining is paved with an arc-shaped waterproof plate, characterized in that further comprising a water stop belt, an end mold plate and a connecting seat arranged at one end of the bottom mold plate, the end mold plate comprises an inner end plate, a middle end plate, an outer end plate and two groups of crossbar assemblies distributed along the circumference of the bottom mold plate, the inner end plate, the middle end plate and the outer end plate are distributed along the radial direction of the bottom mold plate; the inner end plate is provided with an inner end plate connecting lug, the inner end plate connecting lug is provided with an inner end plate connecting hole, the inner end plate connecting hole is provided with an inner end plate threaded hole penetrating through the surface of the inner end plate connecting lug, and an inner end plate locking bolt is screwed into the inner end plate threaded hole; the middle end plate is provided with a middle end plate connecting lug, the middle end plate connecting lug is provided with a middle end plate connecting hole, the middle end plate connecting hole is provided with a middle end plate threaded hole penetrating through the surface of the middle end plate connecting lug, and a middle end plate locking bolt is screwed into the middle end plate threaded hole; the outer end plate is provided with an outer end plate connecting lug, the outer end plate connecting lug is provided with an outer end plate connecting hole, the outer end plate connecting hole is provided with an outer end plate threaded hole penetrating through the surface of the outer end plate connecting lug, and an outer end plate locking bolt is screwed into the outer end plate threaded hole; the crossbar assembly comprises a connecting shaft and two groups of end head plate connecting lugs distributed along the extension direction of the connecting shaft, the end head plate connecting lugs are fixed on the connecting seat, the same group of end head plate connecting lugs comprises two end head plate connecting lugs distributed perpendicularly to the direction of the connecting shaft, the end head plate connecting lugs are provided with connecting lug through holes, a connecting shaft is simultaneously arranged in the connecting lug through holes of the two groups of end head plate connecting lugs, a stop screw is simultaneously arranged in the connecting lug through holes of the other group of end head plate connecting lugs, and a stop nut is connected together after the stop screw is arranged in the connecting lug through holes, the connecting shaft is simultaneously arranged in the inner end plate connecting hole, the middle end plate connecting hole and the outer end plate connecting hole, the inner end plate locking bolt, the middle end plate locking bolt and the outer end plate locking bolt all abut on the connecting shaft, the inner end plate and the middle end plate clamp the water stop belt, and the outer end plate abuts on the waterproof plate.The process for pouring the second lining of the tunnel is as follows: A, pouring the first section of the second lining of the tunnel, connecting a plurality of connecting seats with end plate connecting ears distributed along the circumference of the bottom form on the end face of the bottom form; B, moving the trolley to the end of the bottom form away from the connecting seat and lapping on the poured section of the second lining of the tunnel, so that the two connecting shafts are connected to the connecting seats located at the circumferential ends of the bottom form; C, forming a local cavity of the second lining of the tunnel: rotating the connecting shaft around the shaft to lap the inner end plate on the end face of the bottom form or the connecting seat, so that the outer end plate and the waterproof plate are sealed and abutted together, the anti-rotation screw is worn and the anti-coming-off nut is locked, thereby preventing the connecting shaft from rotating, and the end form plate, the bottom form, the tunnel bottom lining and the poured section of the second lining of the tunnel form a local cavity of the second lining of the tunnel; D, pouring concrete in the local cavity of the second lining of the tunnel to form a local section of the second lining of the tunnel; E, removing the connecting shaft and connecting it to the connecting seat adjacent to the poured local section of the second lining of the tunnel, repeating C to D to pour the second local section of the second lining of the tunnel in the same section of the second lining of the tunnel; repeating C to E to complete the pouring of one section of the second lining of the tunnel; repeating B to E to complete the pouring of all sections of the second lining of the tunnel.

[0006] As a preferred, the inner end plate and the outer end plate are lapped together. It can adapt to the change of radial size.

[0007] As a preferred, the inner end plate is provided with a storage through hole distributed in the up-down direction, and the storage through hole is provided with a transparent isolation plate at one end of the connecting shaft, and the isolation plate isolates a storage hole in the storage through hole. When pouring, the pouring height of the concrete is observed through the isolation plate.

[0008] As a preferred, the storage through hole is provided with a small diameter section at one end of the connecting shaft to form a support step, and the isolation plate is supported on the support step, and the isolation plate is detachably installed in the storage hole, and the side of the isolation plate away from the small diameter section is detachably covered with a transparent protective film. After pouring, the concrete flowing into the storage hole is removed by pushing the isolation plate away from the support step, then the protective film is peeled off and a new protective film is covered, and the isolation plate is reinstalled in the storage through hole. When reused, the isolation plate can still be clearly observed.

[0009] As a preferred, the storage hole stores phenolphthalein powder. When the pouring height reaches the storage hole, the concrete will turn red when it contacts the phenolphthalein powder. It can more conveniently and reliably observe the concrete.

[0010] As preferred, one end of the connecting seat of the bottom formwork is provided with a guide slot distributed along the circumference of the bottom formwork, both ends of the guide slot are provided with a barb slot, the connecting seat comprises a connecting plate outside the guide slot and a clamping strip penetrating into both barb slots, the clamping strip is threadedly connected with a clamping screw, the clamping screw penetrates into the connecting plate, the head of the clamping screw drives the connecting plate to clamp the slot wall of the barb slot through the clamping strip, and the end plate part connecting ear is connected to the connecting plate. After pouring in one position, loosen the clamping screw, then move the connecting seat along the guide slot to the required position, and then lock the clamping screw to fix the connecting seat. Only one connecting seat is needed to complete the pouring of the whole tunnel secondary lining.

[0011] As preferred, a supporting ball is arranged on the clamping strip to support on the bottom wall of the guide slot. It is labor-saving to move the connecting seat.

[0012] As preferred, the outer end plate is provided with a self-adaptive sealing structure for sealing the outer end plate and the waterproof plate together, the self-adaptive sealing structure comprises an arc-shaped elastic sealing strip, an elastic connecting sleeve for sealing and connecting the elastic sealing strip and the outer end plate together, and a plurality of cylinder bodies arranged in the outer end plate, a piston is slidingly and sealingly connected in the cylinder body, the piston is connected with the elastic sealing strip through a piston rod, the piston rod penetrates into the elastic connecting sleeve, the elastic sealing strip is pressed on the waterproof plate through the piston rod, the diameter of the circle where the elastic sealing strip is located is greater than the diameter of the circle where the waterproof plate is located, the piston separates the cylinder body into a rod cavity and a rodless cavity, and all the piston rods are distributed along the circumference of the waterproof plate. The outer end plate can be reliably sealed together when the curvature of the inner circumferential surface of the tunnel bottom lining is different. The second invention object is achieved.

[0013] As preferred, an elastic sealing layer is arranged on the side surface of the elastic sealing strip in contact with the waterproof plate, the rod cavity of all the cylinder bodies is in communication with a first fluid inlet and outlet, and the rodless cavity is in communication with a second fluid inlet and outlet. The sealing reliability can be improved. When sealing, a fluid with pressure is input through the second fluid inlet and outlet to make the fluid in the rod cavity flow out through the first fluid inlet and outlet. When unsealing and removing the outer end plate, a fluid with pressure is input through the first fluid inlet and outlet to make the fluid in the rod cavity flow out through the second fluid inlet and outlet.

[0014] As preferred, all the cylinder bodies are distributed along the radial direction of the bottom formwork, one end of the rod cavity is provided with an avoidance channel for the piston rod to pass through, and the piston rod is sealingly connected with the end wall away from the piston of the avoidance channel. In a limited space, the piston area in each cylinder can be large so that each cylinder can bear a large force.

[0015] Beneficial effect: when used twice, the end template does not need to be newly built, saving time and effort; good sealing effect, not easy to leak slurry, can conveniently or mix concrete pouring position. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of embodiment one of the present application; Figure 2 is a partial enlarged schematic diagram of Figure 1 ; Figure 3 is a schematic diagram of the cross section of the inner end plate; Figure 4 is a schematic diagram of the side view of embodiment two of the present application; Figure 5 is a partial enlarged schematic diagram of Figure 4 ; Figure 6 is a partial enlarged schematic diagram of A of Figure 5 ; Figure 7 is a partial enlarged schematic diagram of B of Figure 5 .

[0017] In the figure: base template 1, waterproof board 2, water stop 3, end template piece 4, connecting seat 5, inner end plate 6, middle end plate 7, outer end plate 8, inner end plate part connecting lug 10, inner end plate part locking bolt 11, middle end plate part locking bolt 13, outer end plate part connecting lug 14, outer end plate part locking bolt 15, connecting shaft 16, end head plate part connecting lug 17, rotating shaft 18, rotation stopping screw 19, anti-coming-off nut 20, storage through hole 21, isolation plate 22, storage hole 23, support step 24, protective film 25, guide groove 26, barbed groove 27, connecting plate 28, clamping strip 29, clamping screw 30, support rolling ball 31, self-adapting sealing structure 32, elastic sealing strip 33, elastic connecting sleeve 34, cylinder body 35, piston 36, piston rod 37, rod cavity 38, rodless cavity 39, elastic sealing layer 40, first fluid inlet and outlet 41, second fluid inlet and outlet 42, avoidance channel 43. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0019] Embodiment one, see Figures 1 to 3The utility model provides a kind of tunnel second lining concrete pouring mould structure, including formwork trolley and the bottom formwork 1 being arranged on formwork trolley, and the bottom formwork is used to form the inner circumferential surface of tunnel second lining.Arc-shaped waterproof board 2 (only part is shown in the drawing) is laid on the inner circumferential surface of tunnel bottom lining.It also includes waterstop 3 (also only part is shown in the drawing), end formwork piece 4 and connecting seat 5 arranged at the end of bottom formwork.The connecting seat can be provided with multiple or one movable on the end surface of bottom formwork.End formwork piece includes inner end plate 6, middle end plate 7, outer end plate 8 and two groups of crossbar assembly distributed along the circumference of bottom formwork.Inner end plate, middle end plate and outer end plate are distributed along the radial direction of bottom formwork;Inner end plate is provided with inner end plate part connecting lug 10, and inner end plate part connecting lug is provided with inner end plate part connecting hole, and inner end plate part connecting hole is provided with inner end plate part screw hole penetrating the surface of inner end plate part connecting lug, and inner end plate part screw hole is screw-connected with inner end plate part locking bolt 11;Middle end plate is provided with middle end plate part connecting lug 12, and middle end plate part connecting lug is provided with middle end plate part connecting hole, and middle end plate part connecting hole is provided with middle end plate part screw hole penetrating the surface of middle end plate part connecting lug, and middle end plate part screw hole is screw-connected with middle end plate part locking bolt 13;Outer end plate is provided with outer end plate part connecting lug 14, and outer end plate part connecting lug is provided with outer end plate part connecting hole, and outer end plate part connecting hole is provided with outer end plate part screw hole penetrating the surface of outer end plate part connecting lug, and outer end plate part screw hole is screw-connected with outer end plate part locking bolt 15;Crossbar assembly includes connecting shaft 16 and two groups of end head plate part connecting lug 17 distributed along the extension direction of connecting shaft, and end head plate part connecting lug is fixed on connecting seat, and the same group of end head plate part connecting lug includes two end head plate part connecting lugs distributed perpendicularly to the direction of connecting shaft, and end head plate part connecting lug is provided with connecting lug part through hole, and rotating shaft 18 is simultaneously arranged in the two connecting lug part through holes of connecting shaft and one group of end head plate part connecting lug, and stop screw 19 is simultaneously arranged in the two connecting lug part through holes of connecting shaft and another group of end head plate part connecting lug after being arranged, and then stop nut 20 is connected together, connecting shaft is simultaneously arranged in inner end plate part connecting hole, middle end plate part connecting hole and outer end plate part connecting hole, and inner end plate part locking bolt, middle end plate part locking bolt and outer end plate part locking bolt all abut on the connecting shaft, and inner end plate and middle end plate clamp the waterstop, and outer end plate abuts on waterproof board.The process for pouring the second lining of the tunnel comprises the following steps: A, connecting a plurality of connecting seats with end plate connecting ears distributed along the circumference of the bottom formwork on the end surface of the bottom formwork after pouring the first section of the second lining of the tunnel; B, moving the trolley to the end of the bottom formwork away from the connecting seat and overlapping the trolley on the poured section of the second lining of the tunnel, so that the two connecting shafts are connected to the connecting seats located at the circumferential ends of the bottom formwork; C, forming a local cavity of the second lining of the tunnel: rotating the connecting shaft around the rotating shaft to overlap the inner end plate on the end surface of the bottom formwork or the connecting seat, so that the outer end plate and the waterproof plate are sealed and abutted together, the anti-rotation screw is tightened, and the anti-removal nut is locked, so as to prevent the connecting shaft from rotating, and the end formwork plate, the bottom formwork, the tunnel bottom lining and the poured section of the second lining of the tunnel form a local cavity of the second lining of the tunnel; D, pouring concrete in the local cavity of the second lining of the tunnel to form a local section of the second lining of the tunnel; E, removing the connecting shaft and connecting it to the connecting seat adjacent to the poured local section of the second lining of the tunnel, repeating steps C to D to pour the second local section of the second lining of the tunnel in the same section of the second lining of the tunnel; repeating steps C to E to complete the pouring of one section of the second lining of the tunnel; and repeating steps B to E to complete the pouring of all sections of the second lining of the tunnel.

[0020] The inner end plate and the outer end plate overlap together. The inner end plate is provided with a storage through hole 21 distributed in the up-down direction, and the storage through hole is provided with a transparent isolation plate 22 at one end of the connecting shaft, which isolates a storage hole 23 in the storage through hole. The storage through hole is provided with a small diameter section at one end of the connecting shaft to form a support step 24, and the isolation plate is supported on the support step. The isolation plate is detachably installed in the storage hole, and the side of the isolation plate away from the small diameter section is covered with a transparent protective film 25. The storage hole stores phenolphthalein powder.

[0021] In the second embodiment, the difference from the first embodiment is that: Referring to Figures 4 to 7The end of the connecting seat of the bottom template is provided with a guide groove 26 distributed along the circumference of the bottom template, both ends of the guide groove in the width direction are provided with a barb groove 27, the connecting seat includes a connecting plate 28 outside the guide groove and a clamping strip 29 penetrating through both ends of the barb groove, the clamping strip is screw-connected with a clamping screw 30, the clamping screw penetrates through the connecting plate, the head of the clamping bolt drives the connecting plate to cooperate with the clamping strip to clamp the groove wall of the barb groove, and the end plate part connecting lug is connected to the connecting plate. The clamping strip is provided with a supporting ball 31 for supporting on the bottom wall of the guide groove. The outer end plate is provided with a self-adapting sealing structure 32 for sealing the outer end plate and the waterproof plate together, the self-adapting sealing structure includes an elastic sealing strip 33 with an arc structure, an elastic connecting sleeve 34 for sealingly connecting the elastic sealing strip and the outer end plate together, and a plurality of cylinder bodies 35 arranged in the outer end plate, a piston 36 is slidingly and sealingly connected in the cylinder body, the piston is connected with the elastic sealing strip through a piston rod 37, the piston rod penetrates through the elastic connecting sleeve, the elastic sealing strip is pressed on the waterproof plate through the piston rod, the diameter of the circle where the elastic sealing strip is located is greater than the diameter of the circle where the waterproof plate is located, the piston separates the cylinder body into a rod cavity 38 and a rodless cavity 39, and all the piston rods are distributed along the circumference of the waterproof plate. An elastic sealing layer 40 is arranged on the side surface of the elastic sealing strip in contact with the waterproof plate, the rod cavities of all the cylinder bodies are communicated with a first fluid inlet and outlet 41, and the rodless cavities are communicated with a second fluid inlet and outlet 42. All the cylinder bodies are distributed along the radial direction of the bottom template, one end of the rod cavity is provided with an avoiding channel 43 for the piston rod to pass through, and the piston rod is sealingly connected with the end wall of the avoiding channel away from the piston.

[0022] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not, without more limitations, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0023] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A tunnel secondary lining concrete pouring formwork structure comprising a formwork carriage and a bottom formwork provided on the formwork carriage, the bottom formwork being used to form an inner circumferential surface of a tunnel secondary lining, an arc-shaped waterproof board being laid on the inner circumferential surface of the tunnel secondary lining, characterized in that, The end plate further comprises an inner end plate, a middle end plate, an outer end plate, and two groups of crosspiece assemblies distributed along the circumference of the bottom formwork, the inner end plate, the middle end plate, and the outer end plate are distributed along the radial direction of the bottom formwork; the inner end plate is provided with an inner end plate connecting lug, the inner end plate connecting lug is provided with an inner end plate connecting hole, the inner end plate connecting hole is provided with an inner end plate threaded hole penetrating the surface of the inner end plate connecting lug, and an inner end plate locking bolt is screwed into the inner end plate threaded hole; the middle end plate is provided with a middle end plate connecting lug, the middle end plate connecting lug is provided with a middle end plate connecting hole, the middle end plate connecting hole is provided with a middle end plate threaded hole penetrating the surface of the middle end plate connecting lug, and a middle end plate locking bolt is screwed into the middle end plate threaded hole; the outer end plate is provided with an outer end plate connecting lug, the outer end plate connecting lug is provided with an outer end plate connecting hole, the outer end plate connecting hole is provided with an outer end plate threaded hole penetrating the surface of the outer end plate connecting lug, and an outer end plate locking bolt is screwed into the outer end plate threaded hole; the crosspiece assembly comprises a connecting shaft and two groups of end head plate connecting lugs distributed along the extension direction of the connecting shaft, the end head plate connecting lug is fixed on the connecting seat, the same group of end head plate connecting lugs comprises two end head plate connecting lugs distributed along the direction perpendicular to the connecting shaft, the end head plate connecting lug is provided with a connecting lug through hole, the connecting shaft is simultaneously arranged in the connecting lug through hole of the two end head plate connecting lugs of one group of end head plate connecting lugs, and the connecting shaft is simultaneously arranged in the connecting lug through hole of the two end head plate connecting lugs of the other group of end head plate connecting lugs after a stop screw is arranged in the connecting lug through hole; the connecting shaft is simultaneously arranged in the inner end plate connecting hole, the middle end plate connecting hole, and the outer end plate connecting hole, the inner end plate locking bolt, the middle end plate locking bolt, and the outer end plate locking bolt are all abutted on the connecting shaft, the inner end plate and the middle end plate clamp the water stop belt, and the outer end plate is abutted on the waterproof plate.

2. A tunnel secondary lining concrete casting form structure according to claim 1, characterized in that, The middle end plate and the outer end plate are overlapped together.

3. A tunnel lining formwork structure according to claim 1 or 2, characterised in that, The inner end plate is internally provided with a storage through hole distributed along the up-down direction, the storage through hole is provided with a transparent isolation plate at one end of the connecting shaft, and the isolation plate separates a storage hole in the storage through hole.

4. A tunnel secondary lining concrete casting form structure according to claim 3, wherein The storage through hole is provided with a small diameter section at one end of the connecting shaft to form a support step, the isolation plate is supported on the support step, the isolation plate is detachably arranged in the storage hole, and the side of the isolation plate away from the small diameter section is detachably covered with a transparent protective film.

5. A tunnel secondary lining concrete casting form structure according to claim 3, wherein The storage hole stores phenolphthalein powder. When the pouring height reaches the storage hole, the concrete contacts the phenolphthalein powder and turns red.

6. A tunnel secondary lining concrete casting form structure according to claim 1 or 2, characterized in that, The bottom mold plate is provided with a connecting seat, one end of which is provided with a guide groove distributed along the circumference of the bottom mold plate, both ends of the guide groove in the width direction are provided with a barb groove, the connecting seat comprises a connecting plate outside the guide groove and a clamping strip penetrating through both ends of the barb groove, the clamping strip is threadedly connected with a clamping screw, the clamping screw penetrates through the connecting plate, the head of the clamping bolt drives the connecting plate to clamp the groove wall of the barb groove through the clamping strip, and the end plate part connecting ear is connected to the connecting plate. After pouring one part, loosen the clamping screw, then move the connecting seat along the guide sliding groove to the required position, and then lock the clamping screw to fix the connecting seat.

7. A tunnel lining formwork structure according to claim 6, wherein The clamping strip is provided with a supporting ball for supporting on the bottom wall of the guide groove.

8. The tunnel secondary lining concrete casting form structure according to claim 1, characterized in that, The outer end plate is provided with a self-adaptive sealing structure for sealing the outer end plate and the waterproof plate together, the self-adaptive sealing structure comprises an elastic sealing strip in an arc structure, an elastic connecting sleeve for sealing and connecting the elastic sealing strip and the outer end plate together, and a plurality of cylinder bodies arranged in the outer end plate, the cylinder body is slidingly and sealingly connected with a piston, the piston is connected with the elastic sealing strip through a piston rod, the piston rod penetrates through the elastic connecting sleeve, the elastic sealing strip is pressed on the waterproof plate through the piston rod, the diameter of the circle where the elastic sealing strip is located is greater than the diameter of the circle where the waterproof plate is located, the piston separates the cylinder body into a rod cavity and a rodless cavity, and all the piston rods are distributed along the circumference of the waterproof plate.

9. A tunnel lining formwork structure according to claim 8, wherein, The elastic sealing strip is provided with an elastic sealing layer on the side surface in contact with the waterproof plate, all the rod cavities of the cylinder bodies are in communication with a first fluid inlet and outlet, and the rodless cavities are in communication with a second fluid inlet and outlet. The sealing reliability can be improved. When sealing, a fluid with pressure is input through the second fluid inlet and the fluid in the rod cavity flows out through the first fluid inlet and outlet.

10. A tunnel lining formwork structure according to claim 8 or 9, wherein, All the cylinder bodies are distributed along the radial direction of the bottom mold plate, one end of the rod cavity is provided with an avoidance channel for the piston rod to pass through, and the piston rod is sealingly connected with the end wall of the avoidance channel away from the piston. The clamping strip is provided with a supporting ball for supporting on the bottom wall of the guide groove.

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