Large-section tunnel secondary lining trolley modular plugging template

Abstract

The utility model provides a large-section tunnel secondary lining trolley modularization plugging formwork which comprises a movable formwork and a fixed formwork, the movable formwork is buckled on the fixed formwork and forms a plugging face used for plugging concrete, the fixed formwork is provided with an adjusting piece, and the adjusting piece abuts against the movable formwork and is used for adjusting the position of the movable formwork on the fixed formwork. And the movable template is provided with a fastener which is used for fixing the movable template on the fixed template. Under the cooperation of the movable formwork and the fixed formwork, the formed plugging face can replace a traditional wood plate to plug the concrete pouring end, the utilization rate is high, the weight is light, the use amount of wood is effectively reduced, compared with wood plugging, the quality of the plugging face after concrete pouring is guaranteed, and the construction cost is reduced. And under the cooperation of the adjusting piece, the position of the movable template on the fixed template can be adjusted, so that the movable template and the fixed template are respectively propped against the two ends of the end head, the gap of the end head is compensated, and the sealing performance is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a modular plugging template for a second lining trolley of a large-section tunnel. Background Art

[0002] In tunnel projects that are constructed using the drill and blast method and use composite lining, it is necessary to use a steel formwork trolley to mold the secondary lining. Among them, the secondary lining is mostly molded using a steel formwork trolley. During the pouring of the secondary lining concrete, one side of the trolley is in contact with the already formed concrete and does not need to be blocked. The other side is exposed to the air, so a plugging formwork is required. In traditional blocking construction, wooden boards are generally pre-assembled and then blocked with the assembled wooden boards. However, due to the strong water absorption of the wooden boards, the local concrete strength is low, and it is not easy to demold in the later stage. In addition, the reuse rate of the used wooden boards is low, which will waste a lot of wood. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a modular plugging template for a large-section tunnel secondary lining trolley, which solves the problems in the prior art of using wooden boards for plugging, which leads to low local concrete strength, difficulty in demoulding in the later stage, and low reuse rate of the used wooden boards, thus wasting a large amount of wood.

[0004] According to the embodiment of the utility model, the utility model adopts the following technical solution:

[0005] A modular plugging template for a large-section tunnel secondary lining trolley comprises a movable template and a fixed template. The movable template is buckled on the fixed template to form a plugging surface for sealing concrete. The fixed template is provided with an adjusting piece, which abuts against the movable template and is used to adjust the position of the movable template on the fixed template to adjust the size of the plugging surface. The movable template is provided with a fastener for fixing the movable template to the fixed template.

[0006] Preferably, the adjusting member comprises at least one mounting seat fixed to the fixed template and an adjusting screw threadedly connected to the mounting seat, and an end of the adjusting screw abuts against the movable template.

[0007] Preferably, an extrusion block is sleeved on the end of the adjusting screw rod, and the extrusion block abuts against the movable template.

[0008] Preferably, a nut is fixedly provided on the other end of the adjusting screw rod.

[0009] Preferably, the fastener comprises a fixing frame provided on the movable template and a fastening screw threadedly connected to the fixing frame, and an end of the fastening screw abuts against a side surface of the fixed template.

[0010] Preferably, the fixing frame has an extension tube extending along the axis of the threaded hole, and the extension tube is sleeved on the fastening screw.

[0011] Preferably, the fixed template is provided with a mounting groove, and the movable template is movably connected to the mounting groove.

[0012] Preferably, a plurality of ribs are provided on the inner side of the fixed template.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] With the cooperation of the movable formwork and the fixed formwork, the sealing surface formed by them can replace the traditional wooden board to seal the concrete pouring end. It has high utilization rate and light weight. It not only effectively reduces the amount of wood used, but also ensures the quality of the sealing surface after concrete pouring compared to wood sealing. With the cooperation of the adjusting part, the position of the movable formwork on the fixed formwork can be adjusted so that the movable formwork and the fixed formwork are respectively abutted against the two ends of the end to achieve the compensation of the end gap and ensure the sealing. In addition, with the cooperation of the fasteners, the movable formwork and the fixed formwork can be fixed so that the two will not be separated during the process of taking and transporting, which is convenient for subsequent direct use in sealing construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0016] Figure 2 It is a structural schematic diagram of a fixed template in an embodiment of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the movable template in the embodiment of the utility model.

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the movable template in the embodiment of the utility model.

[0019] Figure 5 It is a schematic diagram of the blocking state in the embodiment of the utility model.

[0020] In the above drawings: 1. movable template; 2. fixed template; 3. adjusting screw; 4. mounting groove; 5. extrusion block; 6. mounting seat; 7. rib plate; 8. nut; 9. fixing frame; 10. tightening screw; 11. extension tube. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1As shown, an embodiment of the utility model proposes a modular plugging template for a large-section tunnel second lining trolley, comprising a movable template 1 and a fixed template 2, wherein the movable template 1 is buckled into the fixed template 2 and forms a plugging surface for plugging concrete, the fixed template 2 is provided with an adjusting member, the adjusting member abuts against the movable template 1, and is used to adjust the position of the movable template 1 on the fixed template 2 to adjust the size of the plugging surface, and the movable template 1 is provided with a fastener for fixing the movable template 1 to the fixed template 2.

[0023] In the embodiment of the utility model, the movable formwork 1 and the fixed formwork 2 are both made of polymer materials. The sealing surface formed by the buckling of the two can replace the traditional wooden board to seal the concrete pouring end. Compared with the formwork, it is light in weight, high in strength, and high in utilization rate. It not only effectively reduces the use of wood, but also ensures the quality of the sealing surface after concrete pouring compared to wood sealing.

[0024] During plugging, by placing the movable formwork 1 and the fixed formwork 2 between the trolley and the primary lining, the position of the movable formwork 1 on the fixed formwork 2 can be adjusted through the action of the adjusting member, so that the movable formwork 1 and the fixed formwork 2 are respectively abutted against the two ends of the end head, so as to achieve the compensation of the end head gap. Compared with the formwork, it has better flexibility and will not be affected by the plugging area, thus saving construction time. Specifically, water stop strips are provided at the ends of the movable formwork 1 and the fixed formwork 2, due to sealing. Moreover, if Figure 5 As shown, the movable formwork 1 and the fixed formwork 2 can also be used in conjunction with pads. A waterstop seal is provided on each pad and placed at the position of the movable formwork 1 or the fixed formwork 2. The relative position of the movable formwork 1 and the fixed formwork 2 is adjusted by adjusting parts, and the pads are indirectly pressed to increase the contact area between the sealing surface and the concrete.

[0025] Secondly, the movable formwork 1 and the fixed formwork 2 are connected by fasteners, which can fix the movable formwork 1 and the fixed formwork 2 so that they will not be separated during the process of taking and transporting, which is convenient for subsequent disassembly and direct use for plugging construction to ensure the overall integrity.

[0026] Based on the above scheme, Figure 2As shown, the adjusting member includes at least one mounting seat 6 fixed on the fixed template 2 and an adjusting screw 3 threadedly connected to the mounting seat 6, and the end of the adjusting screw 3 abuts against the movable template 1. Specifically, when the movable template 1 is adjusted by the adjusting member, since the mounting seat 6 is fixedly set on the fixed template 2, when the adjusting screw 3 is rotated, the adjusting screw 3 moves upward on the mounting seat 6, so that the end of the adjusting screw 3 lifts the movable template 1, so that the top of the movable template 1 abuts on the primary lining, thereby increasing the size of the sealing surface formed by the movable template 1 and the fixed template 2. Moreover, the movable template 1 is made of polymer material and has a soft texture. Under the lifting action of the end of the adjusting screw 3, the top of the movable template 1 can be deformed and better fit on the primary lining, thereby improving the sealing performance.

[0027] Specifically, the end of the adjusting screw rod 3 is sleeved with an extrusion block 5, and the extrusion block 5 abuts against the movable template 1. Under the action of the extrusion block 5, the contact area between the end of the adjusting screw rod 3 and the movable template 1 can be increased, which not only improves the lifting effect, but also prevents unnecessary wear. In addition, the other end of the adjusting screw rod 3 is fixed with a nut 8, and a tool such as a wrench can be used to cooperate with the nut 8 to adjust the adjusting screw rod 3, which is convenient for manual operation.

[0028] Based on the above scheme, Figure 3 and Figure 4 As shown, the fastener includes a fixing frame 9 provided on the movable template 1 and a fastening screw 10 threadedly connected to the fixing frame 9, and the end of the fastening screw 10 abuts against the side of the fixed template 2. Specifically, when the movable template 1 and the fixed template 2 are installed by fasteners, in the initial assembly, the movable template 1 is directly buckled on the fixed template 2, and then the fastening screw 10 is directly rotated so that the end thereof abuts against the side of the fixed template 2 to complete the fixation of the two. During transportation and taking, the movable template 1 and the fixed template 2 are tightly connected together. It is worth noting that when adjusting the movable template 1 by adjusting the screw rod 3, the fastening screw 10 needs to be rotated in the opposite direction first to release the limit fixation of the movable template 1.

[0029] Specifically, the fixing frame 9 has an extension tube 11 extending along the axis of the threaded hole, and the extension tube 11 is sleeved on the fastening screw 10. Since the wall thickness of the fixing frame 9 is relatively thin, the non-meshing part of the fastening screw 10 can be supported by the set extension tube 11, thereby ensuring the service life of the threaded hole and facilitating the adjustment of the fastening screw 10; moreover, the fixed template 2 is provided with a mounting groove 4, and the movable template 1 is movably connected to the mounting groove 4. The mounting groove 4 can be used to limit the installation of the movable template 1 to ensure the positioning effect of the installation of the two, and the fixing frame 9 is also at a certain distance from the inner side of the movable template 1. When the movable template 1 is connected to the mounting groove 4, the side of the fixing frame 9 can also be made to abut against the inner side of the movable template 1.

[0030] Specifically, Figure 1 As shown, a plurality of ribs 7 are provided on the inner side of the fixed formwork 2 to improve the overall structural strength of the fixed formwork 2 .

[0031] In summary, the movable formwork 1 and the fixed formwork 2 made of polymer have the characteristics of light weight and high strength, and with the cooperation of the movable formwork 1 and the fixed formwork 2, they can replace the traditional wooden boards to seal the concrete pouring ends, thereby ensuring the quality of the sealing surface after concrete pouring, facilitating demoulding, improving the dismantling efficiency, and reducing the time required for the entire construction period. Compared with the structural fixity of the wooden boards, the movable formwork 1 can also be lifted by adjusting the end of the screw rod 3, so that the top of the movable formwork 1 is abutted against the primary lining, thereby increasing the size of the sealing surface formed by the movable formwork 1 and the fixed formwork 2, and being more flexible to use.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A modular plugging template for a large-section tunnel secondary lining trolley, characterized in that: The invention comprises a movable formwork (1) and a fixed formwork (2), wherein the movable formwork (1) is buckled on the fixed formwork (2) to form a blocking surface for blocking concrete, the fixed formwork (2) is provided with an adjusting member, the adjusting member abuts against the movable formwork (1) and is used to adjust the position of the movable formwork (1) on the fixed formwork (2) so as to adjust the size of the blocking surface, and the movable formwork (1) is provided with a fastener for fixing the movable formwork (1) to the fixed formwork (2); The adjusting member comprises at least one mounting seat (6) fixed to the fixed template (2) and an adjusting screw rod (3) threadedly connected to the mounting seat (6), and an end of the adjusting screw rod (3) abuts against the movable template (1); The fastener comprises a fixing frame (9) arranged on the movable template (1) and a fastening screw (10) threadedly connected to the fixing frame (9), and the end of the fastening screw (10) abuts against the side surface of the fixed template (2).

2. According to claim 1, a large-section tunnel secondary lining trolley modular plugging template is characterized in that: An extrusion block (5) is sleeved on the end of the adjusting screw rod (3), and the extrusion block (5) abuts against the movable template (1).

3. A modular plugging template for a large-section tunnel secondary lining trolley according to claim 2, characterized in that: A nut (8) is fixedly provided at the other end of the adjusting screw rod (3).

4. A modular plugging template for a large-section tunnel secondary lining trolley according to claim 1, characterized in that: The fixing frame (9) has an extension tube (11) extending along the axis of the threaded hole, and the extension tube (11) is sleeved on the fastening screw (10).

5. The large-section tunnel secondary lining trolley modular plugging template according to claim 1 is characterized in that: The fixed template (2) is provided with a mounting groove (4), and the movable template (1) is movably engaged with the mounting groove (4).

6. The large-section tunnel secondary lining trolley modular plugging template according to claim 1 is characterized in that: A plurality of rib plates (7) are provided on the inner side of the fixed template (2).

Images