Dual-purpose device for tunnel central ditch construction

Abstract

The utility model relates to a dual-purpose device for tunnel central ditch construction, which comprises two templates, a plurality of template support frames are connected between the two templates at equal intervals from the end part to the tail part, and a plurality of grate rods are longitudinally connected above all the template support frames at equal intervals. The device has the functions of a steel formwork and a steel bar rain grate at the same time, when a tunnel bottom plate is constructed, the device can serve as a bottom plate pouring center ditch shaping formwork and a ditch rain grate only by being installed in place at a time, the center ditch formwork is small in positioning deviation, the standard requirement can be met, and the ditch rain grate can also achieve vehicle turning. Therefore, compared with a traditional device, the device has the advantages that the template mounting time can be saved, and the construction efficiency and the construction quality of the tunnel bottom plate are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction devices, in particular to a dual-purpose device for tunnel central drainage ditch construction. Background Technique

[0002] At present, the domestic tunnel construction technology has been very mature. When constructing a tunnel with a central drainage ditch, the formwork for the central drainage ditch construction generally adopts a fixed-type combined formwork or a wooden formwork. After the formwork is erected, concrete is poured. After the strength of the bottom slab concrete reaches the standard, the formwork is removed. At the same time, in order to facilitate the subsequent turning around of vehicles at the end of the secondary lining, generally, a steel plate is covered on the central drainage ditch at the end of the bottom slab, and the covered steel plate has a function similar to that of a rain grate.

[0003] This traditional tunnel construction method of "erecting the formwork for the central drainage ditch + covering the steel plate" has the disadvantages of inaccurate formwork positioning, long formwork erection time, and difficult construction quality control. In addition, the subsequent covering of the steel plate also has the disadvantages of requiring separate towing and extended process time. Content of the Utility Model

[0004] In view of the above problems, the utility model provides a dual-purpose device for tunnel central drainage ditch construction, which organically integrates the two functions of construction formwork and rain grate on the same device, thereby streamlining the operation of erecting the formwork for the central drainage ditch + covering the steel plate in traditional tunnel construction and improving the construction efficiency and quality of the tunnel bottom slab.

[0005] The specific technical solution of the utility model is: a dual-purpose device for tunnel central drainage ditch construction, including two formworks, and a plurality of formwork support frames are equidistantly connected between the two formworks from the end to the tail. A plurality of grate bars are longitudinally and equidistantly connected above all the formwork support frames.

[0006] Further, preferably, the layout spacing of the formwork support frames is 1 m.

[0007] Further, preferably, the layout spacing of the grate bars is 5 cm.

[0008] Further, preferably, both the formwork and the formwork support frames are made of 10-mm-thick steel plates.

[0009] Further, preferably, the grate bars are made of C20 steel bars.

[0010] Further, preferably, the height of the formwork support frame is half of the height of the formwork.

[0011] Further, preferably, the length of the formwork is the length of one cycle construction section of the tunnel bottom slab.

[0012] Further, preferably, the length of the grate bars is the same as the length of the formwork.

[0013] The beneficial effects of the present utility model are as follows: The device has both the functions of a steel formwork and a steel bar drain grate. When constructing the tunnel floor slab, it only needs to be installed in place once, and it serves as the fixed formwork for the central water channel and the drain grate for the water channel during the pouring of the floor slab. Moreover, the positioning deviation of the central water channel formwork is small, which can meet the specification requirements, and the vehicle can also make a U-turn on the drain grate. Thus, compared with the traditional device, this device can save the formwork installation time and improve the construction efficiency and quality of the tunnel floor slab. Brief Description of the Drawings

[0014] Figure 1 It is a cross-sectional view of the construction state of the central water channel formwork-grate dual-purpose device of the present utility model;

[0015] Figure 2 is Figure 1 the cross-sectional view of the central water channel formwork-grate dual-purpose device in

[0016] Figure 3 is Figure 2 the top view of

[0017] Figure 4 is Figure 3 the A-A cross-sectional view of

[0018] Figure 5 is the structural schematic diagram of the central water channel formwork-grate dual-purpose device;

[0019] In the figure: 1 - formwork-grate dual-purpose device, 11 - formwork, 12 - formwork support frame, 13 - grate rod; 2 - floor slab, 3 - central water channel. Detailed Embodiment

[0020] In order to make the technical problems and technical solutions solved by the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "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 utility model, 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 should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arrangement", "installation", and "connection" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] As Figures 1 to 5 shown, a dual-purpose device for tunnel central drainage ditch construction includes two templates 11. A number of template support frames 12 are equidistantly connected between the two templates 11 from the end to the tail. A number of grating bars 13 are longitudinally and equidistantly connected above all the template support frames 12. Among them, the layout spacing of the template support frames 12 is 1 m, the layout spacing of the grating bars 13 is 5 cm, and the height of the template support frames 12 is half of the height of the templates 11.

[0024] During fabrication, the sizes of the templates 11, the template support frames 12, and the grating bars 13 are determined according to the length of a cyclic construction section of the tunnel floor slab and the dimensions of the central drainage ditch. Specifically, both the templates 11 and the template support frames 12 are cut from 10-mm-thick steel plates. The length of the two templates 11 is 12 m and the height is 40 cm. The width of the template support frames 12 between the two templates 11 is 40 cm and the height is 20 cm. The grating bars 13 are cut from C20 steel bars, and the length of the steel bars is the same as the length of the templates 11, which is 12 m. After the materials are prepared, first, starting from one end of the two templates 1, the template support frames 2 are successively welded between the two templates 11 at an interval of 1 m. Then, starting from one side of the template support frames 12, the steel bars are successively welded above a number of template support frames 12 at an interval of 5 cm. In this way, the welding is a whole structure, forming a tunnel central drainage ditch template-grating combination device 1.

[0025] This device is used as the central drainage ditch template: As Figure 1 shown, after the reinforcement placement of the floor slab 2 is completed, the device 1 is manually assisted by machinery and dragged onto the floor slab 2 with the completed reinforcement at one time, and the device is fixed firmly according to the design standard. The two templates 11 of the device serve as the shaping templates for the construction of the central drainage ditch. Subsequently, the installation of the tunnel central drainage ditch template is inspected for qualification. After passing the inspection, the floor slab concrete is poured. After pouring, the outer sides of the two templates 11 form the tunnel floor slab, and the central drainage ditch 3 of the tunnel is formed between the two templates 11. In this way, a cyclic construction section of the floor slab is completed.

[0026] The device serves as a temporary rain grate: After the floor slab concrete is cured to meet the traffic conditions specified in the design code, on the one hand, the grate rod 3 of the device can serve as a temporary rain grate for the central drainage ditch 3, and on the other hand, with the support of the formwork support frame 12, the rain grate can also enable vehicles to turn around at this location.

[0027] The present utility model has been described in detail through specific and preferred embodiments. However, those skilled in the art should understand that the present utility model is not limited to the above-described embodiments. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dual-purpose device for constructing a central ditch in a tunnel, characterized by: It comprises two templates (11), a plurality of template support frames (12) are equidistantly connected between the two templates (11) from the end to the tail, and a plurality of grate rods (13) are longitudinally equidistantly connected above all the template support frames (12).

2. A dual-purpose device for constructing a central ditch in a tunnel according to claim 1, characterized in that: The template support frames (12) are arranged at a spacing of 1 m.

3. A dual-purpose device for constructing a central ditch in a tunnel according to claim 1, characterized in that: The arrangement spacing of the grate rods (13) is 5 cm.

4. A dual-purpose device for constructing a central ditch in a tunnel according to claim 1 or 2, characterized in that: The template (11) and the template support frame (12) are both made of 10 mm thick steel plates.

5. A dual-purpose device for constructing a central ditch in a tunnel according to claim 1 or 3, characterized in that: The grate rod (13) is made of C20 steel bars.

6. A dual-purpose device for constructing a central ditch in a tunnel according to claim 4, characterized in that: The height of the template support frame (12) is half the height of the template (11).

7. A dual-purpose device for constructing a central ditch in a tunnel according to claim 6, characterized in that: The length of the template (11) is the length of one cycle construction section of the tunnel floor.

8. A dual-purpose device for constructing a central ditch in a tunnel according to claim 7, characterized in that: The length of the grate rod (13) is the same as that of the template (11).

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