Template structure of tunnel secondary lining construction trolley

Abstract

The invention discloses a template structure of a tunnel secondary lining construction trolley, which comprises a large template and a small template which are alternately arranged on the same circumference, one of the two sides of the large template and the two sides of the small template is provided with a guide groove, the other one is provided with a guide block capable of moving in the guide groove, the large template comprises a large panel, and the large panel comprises a small panel. The longitudinal ribs on the inner side of the large panel are connected with the annular ribs; the method has the beneficial effects that stress can be applied to the large formwork in advance through the small formwork, the ideal non-slab-staggering state of the secondary lining lap joint section (theoretically, no slab staggering exists) is achieved, and the secondary lining construction effect is optimized; meanwhile, a supporting lead screw is omitted, so that the time for disassembling and erecting the mold is greatly shortened; and better adaptive capacity is achieved for hole diameter changes frequently encountered by water conservancy tunnels, and only one diameter changing module needs to be additionally arranged.

Description

Technical Field

[0001] The present invention relates to the technical field of secondary lining construction of tunnels, and particularly to a formwork structure of a secondary lining construction trolley for tunnels. Background Art

[0002] During the construction of railway, highway tunnels and water conservancy tunnels, the drill and blast method and mechanical tunneling using TBM / shield machine are mainly used. Generally, secondary lining concrete is required for both methods, and the corresponding secondary lining construction methods are also different. The drill and blast method usually uses a secondary lining steel formwork trolley with a plug formwork and a concrete pump truck for secondary in-situ concrete lining; while for mechanical tunneling, a segment erector is generally equipped on the TBM / shield machine. After transporting the precast concrete segments outside the tunnel into the tunnel, they are directly assembled to the designed position of the segments, and grouting is carried out between the segments and the surrounding rock after assembling a certain distance along the tunnel axis.

[0003] The cross-sections of tunnels have various shapes such as portal, horseshoe, circular, etc. Circular cross-sections are mostly used in water conservancy. For circular water conservancy tunnels, a full-circle needle beam trolley can be used to pour secondary lining concrete at one time. Different operating conditions have different requirements for secondary lining. Generally speaking, the secondary lining concrete of railway and highway tunnels mainly requires solid inside and beautiful outside, while water conservancy tunnels are used for water transfer or diversion and have higher requirements compared with railway and highway tunnels. Water conservancy tunnels require the secondary lining concrete to be dense inside and smooth on the surface without stepped joints. If the concrete on the tunnel wall is rough or there are stepped joints, (marine) organisms in the water tend to adsorb at the stepped joints and secrete some liquids to corrode the concrete, resulting in the aggregation of (marine) organisms at the stepped joints; moreover, the stepped joints on the tunnel wall will also have an adverse impact on the water flow velocity in the tunnel. At present, there is a phenomenon of stepped joints at the joint between the concrete poured in the current bin and the concrete in the previous bin for the secondary lining concrete of both railway and highway tunnels and water conservancy tunnels, only the size of the stepped joints is different, ranging from a few millimeters to the order of centimeters, which cannot meet the quality requirements of the secondary lining concrete of railway and highway tunnels, especially water conservancy tunnels.

[0004] Such as attached Figure 1 and attached Figure 2As shown in the figure, they are respectively schematic diagrams of the formwork for the construction of the secondary lining in the prior art in the pouring and demoulding states. The formwork includes a plurality of (four in the figure, and four conventional formwork segments 100 are a group) conventional formwork segments 100 that are spliced together to form a circular ring. The outside of the conventional formwork segment 100 is the concrete 200 poured for the secondary lining construction, and the outside of the concrete 200 is the surrounding rock or soil of the mountain body. Adjacent conventional formwork segments 100 are connected by bolts or pins. Among them, the lowermost conventional formwork segment 100 is further divided into a first segmented part 101 and a second segmented part 102, and the first segmented part 101 and the second segmented part 102 are connected by bolts. When demoulding, it is necessary to first remove the connecting bolts between the first segmented part 101 and the second segmented part 102, manually use a chain block or a hydraulic cylinder to turn over the first segmented part 101 and the second segmented part 102, then use a hydraulic cylinder to rotate and contract the conventional formwork segments 100 on the left and right sides inward, and finally use a vertical hydraulic cylinder to lower the entire formwork to complete demoulding. As Figure 3 As shown in the figure, it is the front view of the conventional formwork segment 100, the enlarged sectional view along A - A therein, and the enlarged partial view at I. The conventional formwork segment 100 includes a conventional panel 103. Inside the conventional panel 103, channel steel longitudinal ribs 104 are provided. Longitudinal rib plates 105 are also provided on the left and right sides of the conventional panel 103. Arc-shaped flange plates 106 that can be connected to each other are provided at the front and rear ends of the conventional panel 103, the channel steel longitudinal ribs 104, and the longitudinal rib plates 105 (this connection means that the arc-shaped flange plate 106 of one conventional formwork segment 100 is connected to the arc-shaped flange plate 106 of another conventional formwork segment 100 by bolts). The front and rear length of the conventional formwork segment 100 is generally 1.5 meters. When used in cooperation with a secondary lining trolley with a length of 12 meters (because the overall length of the tunnel is relatively long, when carrying out secondary lining construction, the length of a single construction is 12 meters), 8 groups of conventional formwork segments 100 need to be used simultaneously. The cause of the aforementioned stagger is mainly the stagger formed between the head of the 12-meter concrete formed by the previous secondary lining and the tail of the 12-meter concrete formed by the current secondary lining during two construction processes.

[0005] To solve the problem of stagger, some secondary lining trolleys use the soft lap joint technology. Its principle is to set an extended rubber formwork at the end of the formwork of the secondary lining trolley, and the lap joint section (about 10 cm in length) uses elastic materials such as rubber. In this way, the elastic material can reduce the stagger at the lap joint and play a role in sealing to prevent leakage of concrete slurry. Due to the intervention of the elastic material, the rubber compression amounts at different places on the circular circumference are also different. When erecting the formwork, the steel formwork may not be aligned with the already poured concrete, and there is still a small stagger.

[0006] As the patent with the application number "202121334289.2" discloses "a flexible positioning device for the formwork of a tunnel secondary lining trolley", it is the principle described in the previous paragraph. However, generally, the thickness of the secondary lining is related to the geological classification of the surrounding rock. Therefore, even if the tunnel diameter is the same during tunneling with a TBM or a shield, due to the different thicknesses of the secondary lining, the tunnel diameter after the secondary lining is different, and there is a problem of variable diameter during construction. The conventional formwork of the secondary lining trolley is welded as a whole and cannot change the diameter. When encountering a variable diameter scenario, it is very troublesome to handle. Summary of the Invention

[0007] The purpose of the present invention is to provide a formwork structure for a tunnel secondary lining construction trolley, which can effectively avoid the generation of misalignment.

[0008] To achieve the above purpose, the present invention adopts the following technical solutions: A formwork structure for a tunnel secondary lining construction trolley, including large formworks and small formworks alternately arranged on the same circumference. Among the two sides of the large formworks and the two sides of the small formworks, one has a guide groove, and the other has a guide block that can move in the guide groove.

[0009] Preferably, the large formwork includes a large panel, and longitudinal rib A inside the large panel is connected to the ring rib.

[0010] Preferably, a connecting plate C for connecting with the small formwork is provided at the end of the ring rib, and a guide groove or a guide block is provided on the connecting plate C. Connecting holes for connecting with longitudinal rib A and longitudinal rib B are opened on the ring rib.

[0011] Preferably, the small formwork includes a small panel that can be spliced with the large panel into a complete circumference. Longitudinal rib C is provided inside the small panel, and a guiding member for connecting with the large formwork is provided on the longitudinal rib C.

[0012] Preferably, the guiding member includes a guiding body, and a guide block or a guide groove is provided on the guiding body. Small stiffening plates are provided between the small panel and the longitudinal rib C.

[0013] Preferably, the formwork structure further includes a variable diameter module, and the upper and lower flanges of the variable diameter module are respectively connected to the longitudinal rib A and the ring rib.

[0014] Preferably, connecting plates B for connecting with the longitudinal rib A of another large formwork are provided at both ends of the longitudinal rib A.

[0015] Preferably, longitudinal ribs B are provided on both sides of the large panel, and a connecting plate A for connecting with the ring rib is provided at the end of the longitudinal rib B.

[0016] Preferably, the variable diameter module includes a ring rib B, and an end plate is provided at the end of the ring rib B, and the end plate is in the same direction as the extending direction of the longitudinal rib B.

[0017] The beneficial effects of the present invention are as follows: 1. By using a small template, stress can be applied to the large template in advance to achieve a seamless state in the ideal secondary lining lap section (theoretically without staggering), optimizing the effect of secondary lining construction.

[0018] 2. The template structure of this device enables the template to become an independent load-bearing structure, providing a basic condition for the absence of support screws between the carriage and the template. The carriage structure is simple and the force is clear; at the same time, the operating space between the carriage and the template can be increased.

[0019] 3. The template structure of this device enables the hydraulic control of form removal and form erection to be very fast. The support screws are cancelled, greatly shortening the time for form removal and form erection, thus improving the work efficiency of the carriage, which can be increased by more than ten to twenty percent.

[0020] 4. Since the time for form removal and the forward movement of the formwork carriage is very short and fast, it provides the possibility for the use of a simple curing carriage to carry out initial curing of the concrete after demoulding. It avoids the adverse effects of rust on the formwork of the carriage caused by water and steam during initial curing using the secondary lining carriage, reducing the maintenance workload of the secondary lining carriage; using a curing carriage to carry out initial curing of the concrete, and the cost of the curing carriage is low, better playing the function of the secondary lining carriage, with better economic benefits.

[0021] 5. Conventional secondary lining forms use many small pieces of forms to be assembled horizontally and longitudinally to form a 12-meter-long circular form. Due to the large number of joints, the appearance quality of the concrete is affected. This technology uses one or two forms within a 12-meter length, greatly reducing the number of form joints and making the appearance of the constructed concrete more beautiful.

[0022] 6. The template structure of this device changes the connection of the panel and longitudinal ribs to the frame or flange from welding to bolt connection (the large panel and longitudinal rib A are still welded, and the connection between longitudinal rib A and the ring rib is changed from welding to bolt connection); it has better adaptability to the changes in the tunnel diameter often encountered in water conservancy tunnels, only one variable diameter module needs to be added; moreover, the cost of implementing the variable diameter is low and it is easier to implement. Brief Description of the Drawings

[0023] Figure 1 is a schematic diagram of the current conventional form in the pouring state; Figure 2 is a schematic diagram of the current conventional form in the demoulding state; Figure 3 is Figure 1 the front view of the conventional form block in and the enlarged sectional view along A - A and the enlarged local view at I therein; Figure 4 is a schematic diagram of the form in this application in the pouring state; Figure 5 Schematic diagram of the template in the demoulded state in this application; Figure 6 Schematic diagram of the connection between the large template and the small template in this application; Figure 7 Front view of the large template in this application, sectional view taken along C - C therein, and enlarged view of part I therein; Figure 8 Schematic diagram of the connection between two longitudinal ribs A in this application; Figure 9 Front view of the large panel in this application and enlarged view of part I therein; Figure 10 Front view of the ring rib in this application; Figure 11 Schematic diagram of the structure of the connecting plate C in the ring rib; Figure 12 Front view, top view and sectional view taken along E - E of the small template in this application; Figure 13 For Figure 12 Enlarged views of parts I and II and the sectional view taken along E - E therein; Figure 14 Schematic diagram of the structure of the guide part; Figure 15 Front view of the template with a variable - diameter module added in this application; Figure 16 Front view of the variable - diameter module, sectional view taken along J - J therein, enlarged views in the K direction and at part I; Figure 17 Diagram of common tunnel cross - section shapes.

[0024] The accompanying drawings are only for illustrative purposes and should not be construed as a limitation of this patent; for better illustration of this embodiment, some components in the drawings are omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well - known structures and their descriptions in the drawings may be omitted. Detailed implementation manners

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Embodiment 1 As Figure 4 And Figure 5As shown in the figure, the formwork structure of a tunnel secondary lining construction trolley in this embodiment includes large formworks 1 and small formworks 2 alternately arranged on the same circumference. In this embodiment, there are four large formworks 1 and four small formworks 2 respectively. Before pouring concrete, first install the large formwork 1 at the bottom, then install the two small formworks 2 connected to the bottom large formwork 1, then install the large formworks 1 on the left and right sides and the small formworks 2 connected thereto, and finally install the large formwork 1 at the top. After the formwork is assembled, when pouring concrete, first use two sets of hydraulic cylinders connected to both ends of the trolley frame of the secondary lining trolley to position the formwork as a whole (that is, determine the position of the center of the circle). The power of the small formwork 2 is provided by a hydraulic cylinder (not shown in the figure) connected thereto, and then use the hydraulic cylinder to push the small formwork 2 into place to complete the formwork erection process. When disassembling the formwork, the large formwork at the bottom remains stationary, and use the hydraulic cylinder to drive the small formwork 2 to retract (that is, move towards the center of the circle). Several small formworks 2 retract simultaneously. At the same time, the connection structure between the small formwork 2 and the large formwork 1 will drive several large formworks 1 to also retract inward. At this time, there are gaps between the left and right sides of the overall formwork and the already lined concrete, and there is also a large gap between the top and the already lined concrete, while there is no gap at the bottom. Finally, use the trolley frame to lift the formwork as a whole through the oil cylinder (at this time, the bottom large formwork 1 also moves towards the center of the circle and separates from the concrete), so that the formwork is separated from the concrete and there is a gap between the formwork and the concrete, and it can move forward to pour the concrete in the next bin.

[0027] In some embodiments, the large formworks 1 and the small formworks 2 can also be provided in three or other quantities, which should all be within the protection scope of this application.

[0028] As Figure 6 shown in the figure, in order to facilitate the movement of the small formwork 2 inside the large formwork 1, guide grooves are provided at both ends of the large formwork 1, and guide blocks that can move in the guide grooves are provided on both sides of the small formwork 2, making the movement process of the small formwork 2 smoother. In this embodiment, the guide groove is a dovetail groove. In some embodiments, a T-shaped groove or other nested structures (such as a cylinder and a round hole, etc.) can also be used, which should also be within the protection scope of this application.

[0029] As Figure 7 shown in the figure, the large formwork 1 includes a large panel 11. The outer side of the large panel 11 contacts the poured concrete, and the inner side of the large panel 11 is connected to the ring rib 14 through the longitudinal rib A12. In this embodiment, the longitudinal rib A12 is made of channel steel, and the ring rib 14 is made of I-beam.

[0030] As Figure 9 shown in the figure, longitudinal ribs B13 are provided at both ends of the large panel 11, and connecting plates A131 connected to the ring rib 14 are provided at the ends of the longitudinal ribs B13. The longitudinal rib B13 and the connecting plate A131 are welded.

[0031] As Figure 8As shown, connecting plates B15 for connecting with the longitudinal ribs A12 of another large formwork 1 are provided at both ends of the longitudinal rib A12. In this embodiment, the length of the longitudinal rib A12 is 6 meters (i.e., Figure 7 the transverse length in the C-C cross-sectional view in the figure. In the figure, the distance between two adjacent circumferential ribs 14 is 1.5 meters, and a total of 5 circumferential ribs 14 are provided, with a total length of 6 meters). When it is necessary to use it as a secondary lining trolley with a length of 12 meters, two large formworks 1 need to be spliced and used. At this time, a connecting plate B15 needs to be provided at the end of this longitudinal rib A12 and the front end of another longitudinal rib A12 respectively, and the two are connected by bolts, and two 6-meter-section formworks are spliced into a 12-meter-long formwork. In some embodiments, the longitudinal rib A12 can also be 4 meters per section, and 3 sections are composed of a 12-meter length, and second connecting plates 15 need to be installed at both ends thereof; if both the longitudinal rib A12 and the large panel 11 are 12 meters in length, there is no need to install the connecting plate B15. The above is only described for the 12-meter-long formwork, and it can also be formworks of other lengths.

[0032] The tunnel often has curved sections in the horizontal plane. In order to adapt to the secondary lining of the curved sections, two 6-meter sections need to be connected by folding to better approximate the curved sections. If a 12-meter-long formwork is used to construct a small-radius curved section, the deviation is too large. Therefore, the 6-meter-section formwork is described above.

[0033] As Figure 10 and Figure 11 shown, connecting holes 141 for connecting with the longitudinal ribs A12 and B13 (for passing bolts) are provided on the circumferential rib 14. A connecting plate C142 for connecting with the small formwork 2 is provided at the end of the circumferential rib 14, and a guide groove 143 is provided on the connecting plate C142.

[0034] In this embodiment, the large panel 11 is discontinuously welded to the longitudinal ribs A12 and B13, while the circumferential rib 14 is connected to the longitudinal ribs A12 and B13 by bolts. At both ends of the large formwork 1, the Figure 3 arc-shaped flange plate 106 shown in

[0035] As Figure 12 and Figure 13 shown, the small formwork 2 includes a small panel 21 that can be spliced with the large panel 11 into a complete circumference. When the small formwork 2 and the large formwork 1 are assembled into a pouring state, the outer side of the small panel 21 and the outer side of the large panel 11 form a complete circumference and are in contact with the poured concrete; longitudinal ribs C22 are provided on the inner side of the small panel 21, and the longitudinal ribs C22 can be made of rectangular steel pipes; guide members 24 for connecting with the large formwork 1 are provided on the longitudinal ribs C22.

[0036] In order to improve the strength of the longitudinal rib C22, small rib plates 23 are provided between the small panel 21 and the longitudinal rib C22. As Figure 14As shown, the guide member 24 includes a guide body 241, and guide blocks 242 are provided on the guide body 241.

[0037] As Figure 3 and Figure 9 shown, since the arc-shaped flange plate 106 is cancelled, the overall formed by the large panel 11, the longitudinal rib A12, and the longitudinal rib B13 has a certain elasticity and better diameter-changing adaptability. In view of this, a diameter-changing module 16 is also provided in this formwork structure. As Figure 15 shown, the upper and lower flanges of the diameter-changing module 16 are respectively connected to the longitudinal rib A12 and the ring rib 14. When diameter change is required according to construction requirements, the connecting bolts between the longitudinal rib A12 and the ring rib 14 can be removed first, then the diameter-changing module 16 is placed in, and then the longitudinal rib A12 and the diameter-changing module 16, and the ring rib 14 and the diameter-changing module 16 are connected by bolts. Due to the elasticity of the overall formed by the large panel 11, the longitudinal rib A12, and the longitudinal rib B13, it is easy to change its radius by bolt connection.

[0038] As Figure 16 shown, the diameter-changing module 16 includes a ring rib B161, and end plates 162 are provided at the ends of the ring rib B161. The end plates 162 are in the same extending direction as the longitudinal rib B13, which can facilitate the movement of the small formwork 2. In this embodiment, since the structure composed of the large panel 11 + the longitudinal rib A12 is adopted, and the overall structure has a certain elasticity, it is easy to make it closely fit with the outer flange plate of the diameter-changing module 16 by using bolts. In this way, the problem of using a small-radius formwork to be transformed into a large-radius formwork is solved (when the diameter-changing module 16 is removed, the large-radius formwork is transformed into a small-radius formwork); the disadvantage is that it can only adapt to occasions with small radius changes (generally used for different radii in the same section of the tunnel. However, if the entire secondary lining trolley is transferred to another construction site, as long as the radius change is small, it is also possible).

[0039] In this embodiment, both the ring rib 14 and the ring rib B161 use welded structures of I-beams or I-shaped cross-sections, the longitudinal rib A12 uses channel steel, the longitudinal rib B13 uses plates, and the longitudinal rib C22 uses rectangular steel pipes; in some embodiments, the ring rib 14 and the ring rib B161 can also use small box girders, and the longitudinal rib A12 and the longitudinal rib B13 can also use angle steels, etc.; all should be within the protection scope of this application.

[0040] The main purpose of this embodiment is to solve the problem of stepped joints between two adjacent concretes during concrete pouring. The following content analyzes in detail the reasons for the stepped joints: When the steel formwork (i.e., the conventional formwork in the prior art) was in a load-bearing state during the pouring of the previous bin of concrete, both the steel formwork and the carriage frame in the middle of the cross-section (not shown in the figure) were in a stress state. The steel formwork had a certain strain, which in turn caused a certain deformation (such as a slight shrinkage in the radial direction of the cross-section). Since the strain was small, it was not observable by the human eye. At the same time, the concrete was poured from the steel formwork in a stress state, so the inner contour of the concrete was consistent with the outer contour of the steel formwork in a stress state. When the formwork was erected before pouring in this bin (in the industry, erecting the formwork means converting the formwork from the demoulded state to the state where concrete can be poured), the steel formwork was lapped with the already poured concrete, and the steel formwork was in a state without load and without stress and strain inside. It is obvious that it is impossible to achieve complete coincidence without stepped joints in theory to make the non-load-bearing and stress-free steel formwork coincide with the steel formwork (corresponding concrete surface) in a load-bearing stress state; practical experience has also proved this point.

[0041] Due to the lack of understanding or insufficient attention to the above-mentioned essential reasons, and the failure to carefully analyze the reasons for the stepped joints from the perspective of stress and strain, the problem of stepped joints at the joint of two bins of concrete has not been well solved for decades.

[0042] This embodiment intends to propose a new idea to solve the problem from the perspective of stress and strain. From the above reason analysis, the essential reason for the problem can be clarified. To solve this problem, it is necessary to make the steel formwork in the lapping section in a stress and strain state during the erection of this bin, and the prestress inside it reaches a certain level to resist the stress generated by the concrete load during the pouring process. After the concrete load is applied to the formwork, the steel formwork will not retract and deform so that there will be no gap leakage between the steel formwork and the already poured concrete, resulting in stepped joints.

[0043] Therefore, the principle of generating prestress in the steel formwork in this embodiment is to divide the closed annular (or approximately annular, as shown, with a flat section at the bottom of the circle, which is the most common cross-sectional shape) steel formwork into several large formworks 1, and set wedge-shaped small formworks 2 between the large formworks 1, and use a hydraulic cylinder to drive the movement of the small formworks 2. When the small formworks 2 move radially outward, the formed ring becomes larger and expands outward, and the outer contour of the steel formwork is the same as that of the already poured concrete in the previous bin (i.e., Figure 17 shown), when the small formwork 2 moves radially outward, the formed ring becomes larger and expands outward, and the outer contour of the steel formwork is the same as that of the already poured concrete in the previous bin (i.e., Figure 4fits with the concrete 200) and is restricted by the concrete and cannot expand outwards (in fact, there are also small strains); in this way, prestress can be generated inside the annular steel formwork (it is only necessary to generate prestress in the overlapping section of the two bins because there is only misalignment in the overlapping section. The formwork of this bin except for the overlapping section has no prestress and does not affect the misalignment).

[0044] The main reason why the conventional formwork cannot change its diameter is that: in the prior art, the arc-shaped section of the conventional steel formwork is a welded structure and it is difficult to change.

[0045] The present invention adopts the modular idea for the formwork with a conventional welded structure and replaces the welded structure with a bolted structure; at the same time, the large arc-shaped flange plate of the conventional formwork is cancelled. In this way, the overall formed by the panel, the channel steel longitudinal rib and the longitudinal rib plate has a certain elasticity and has better adaptability to diameter change; at the same time, by adding a diameter-changing module, the problem of diameter change of the steel formwork is solved.

[0046] The above embodiments do not impose any formal restrictions on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention all belong to the protection scope of the technical solution of the present invention.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the protected content of the present invention.

[0048] If words such as "A" and "B" are used in this article to limit the parts, those skilled in the art should know that the use of "A" and "B" is only for the convenience of describing the present invention and simplifying the description. Without additional declaration, the above words have no special meaning.

[0049] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A template structure for a tunnel secondary lining construction trolley, characterized in that: The invention comprises a large template and a small template which are alternately arranged on the same circumference. One of the two sides of the large template and the two sides of the small template has a guide groove, and the other has a guide block which can move in the guide groove.

2. The formwork structure of a tunnel secondary lining construction trolley according to claim 1 is characterized in that: The large template comprises a large panel, and the longitudinal ribs A on the inner side of the large panel are connected to the ring ribs.

3. The formwork structure of a tunnel secondary lining construction trolley according to claim 2 is characterized in that: A connecting plate C connected to the small template is provided at the end of the ring rib, a guide groove or a guide block is provided on the connecting plate C, and a connecting hole connected to the longitudinal ribs A and B is opened on the ring rib.

4. The formwork structure of a tunnel secondary lining construction trolley according to claim 2, characterized in that: The small template includes a small panel that can be spliced ​​with the large panel to form a complete circumference. The inner side of the small panel is provided with a longitudinal rib C, and the longitudinal rib C is provided with a guide member connected to the large template.

5. The formwork structure of a tunnel secondary lining construction trolley according to claim 4, characterized in that: The guide member comprises a guide body, on which a guide block or a guide groove is arranged, and between the small panel and the longitudinal rib C a small rib plate is arranged.

6. The formwork structure of a tunnel secondary lining construction trolley according to claim 2, characterized in that: It also includes a variable diameter module, the upper and lower flanges of which are respectively connected to the longitudinal rib A and the ring rib.

7. The formwork structure of a tunnel secondary lining construction trolley according to claim 2, characterized in that: Both ends of the longitudinal rib A are provided with connecting plates B connected to the longitudinal rib A of another large template.

8. The formwork structure of a tunnel secondary lining construction trolley according to claim 2, characterized in that: Longitudinal ribs B are arranged on both sides of the large panel, and connecting plates A connected to the ring ribs are arranged at the ends of the longitudinal ribs B.

9. The formwork structure of a tunnel secondary lining construction trolley according to claim 6, characterized in that: The variable diameter module includes an annular rib B, and an end plate is provided at the end of the annular rib B. The end plate and the longitudinal rib B extend in the same direction.

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