Large-volume concrete cooling device for super-long and super-thick tunnel lining

Abstract

The utility model belongs to the technical field of tunnel construction, and provides a super-long and super-thick tunnel lining mass concrete cooling device which comprises an outer lining formwork assembly, an inner lining formwork assembly and a cooling assembly. The cambered surface cooling water pipes are arranged on the top formwork and the side formwork, the cambered surface cooling water pipes can synchronously advance along with the lining trolley for cyclic construction, cyclic utilization of the cambered surface cooling water pipes is facilitated, the construction cost is reduced, the cambered surface cooling water pipes are annularly arranged in an S shape along the top formwork and the side formwork, the contact area between the cambered surface cooling water pipes and a lining is increased, and the service life of the lining is prolonged. And meanwhile, the S-shaped structure can enable the cooling water to generate more turbulent flow in the cambered surface cooling water pipe, so that more efficient heat transfer can be realized.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a cooling device for large-volume concrete lining of ultra-long and ultra-thick tunnels. Background Technology

[0002] With the rapid development of railway tunnel construction, the scope of open-cut tunnel construction is becoming increasingly widespread, and the stability requirements for tunnel structures are becoming increasingly stringent. The thickness of existing tunnel lining structures is also increasing accordingly. According to the "Standard for Construction of Mass Concrete," concrete structures with a minimum solid dimension of not less than 1 meter are classified as mass concrete. When the tunnel lining thickness exceeds 1 meter, it can also be defined as mass concrete. In mass concrete structures, due to the large pouring volume and poor thermal conductivity of concrete, the heat generated by cement hydration is difficult to dissipate quickly, creating a temperature difference between the inside and outside, which easily leads to concrete cracking. Especially under external temperature differences, mass concrete, constrained during the cooling process, is more prone to through-cracks, thus reducing its durability and service life, posing a significant hazard.

[0003] Traditional construction methods typically involve laying cooling water pipes inside the concrete, with circulating cooling water to dissipate the heat generated by cement hydration. However, this method is inconvenient for the recycling of cooling water pipes, has high construction costs, and the cooling water pipes are mostly arranged longitudinally along the tunnel, resulting in a small contact area between the pipes and the lining and low heat exchange efficiency. Therefore, to address these technical problems, a large-volume concrete cooling device for ultra-long and ultra-thick tunnel linings is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a large-volume concrete cooling device for ultra-long and ultra-thick tunnel linings, which facilitates the recycling of curved cooling water pipes, reduces construction costs, increases the contact area between cooling water pipes and linings, and improves heat exchange efficiency.

[0005] A cooling device for large-volume concrete lining of ultra-long and ultra-thick tunnels includes:

[0006] The outer lining formwork assembly is installed on the outer lining trolley;

[0007] The inner lining template assembly is installed on the inner lining trolley;

[0008] Both the outer lining formwork assembly and the inner lining formwork assembly include a top formwork and side formwork, with the side formwork hinged to both ends of the top formwork to form an arched structure; and

[0009] The cooling component includes an arc-shaped cooling water pipe. The arc-shaped cooling water pipe is provided on the side of the top formwork and the side formwork that is close to the concrete. The arc-shaped cooling water pipe is arranged in an S-shape around the top formwork and the side formwork. One end of the arc-shaped cooling water pipe has a water inlet and the other end has a drain outlet.

[0010] The beneficial effects of the above-mentioned cooling device for large-volume concrete lining of ultra-long and ultra-thick tunnels are as follows:

[0011] By setting the curved cooling water pipes on the top and side formwork, the curved cooling water pipes can be moved forward synchronously with the lining trolley for cyclic construction, which facilitates the recycling of the curved cooling water pipes and reduces construction costs. In addition, the curved cooling water pipes are arranged in an S-shape along the top and side formwork, which increases the contact area between the curved cooling water pipes and the lining and improves heat exchange efficiency. At the same time, the S-shaped structure can generate more turbulence in the cooling water inside the curved cooling water pipes, which can transfer heat more efficiently.

[0012] In one embodiment, the curved cooling water pipe is a steel pipe. It has high mechanical strength, can withstand greater pressure and external loads, and prevents deformation of the curved cooling water pipe during concrete pouring.

[0013] In one embodiment, the curved cooling water pipe is tightly embedded in the top formwork and the side formwork on the side close to the concrete. The tight fit between the curved cooling water pipe and the top and side formwork increases the heat exchange area, thereby improving the cooling effect on the lining.

[0014] In one embodiment, the cooling assembly further includes interface pipes, and both the water inlet and the water outlet are connected to interface pipes extending out of the top template and the side template. By providing interface pipes extending out of the top template and the side template, it is convenient to connect to an external cooling water supply device through the interface pipes.

[0015] In one embodiment, the connections between the water inlet and the drain outlet and the interface pipe are both covered with waterproof tape. This improves the sealing of the connections between the water inlet and the drain outlet and the interface pipe, preventing water leakage at the connection points.

[0016] In one embodiment, a water valve for regulating the flow rate is provided on the water inlet. By setting the water valve, the flow rate of cooling water entering the arc-shaped cooling water pipe can be adjusted, which facilitates indirect adjustment of the lining cooling temperature as needed. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 A front view of a cooling device for large-volume concrete in ultra-long and ultra-thick tunnel lining, provided in an embodiment of this utility model, installed on an outer formwork lining trolley;

[0019] Figure 2 for Figure 1 The front view of a cooling device for large-volume concrete lining of an ultra-long and ultra-thick tunnel is shown, installed on an inner formwork lining trolley.

[0020] Figure 3 for Figure 1 The image shows a left view of a large-volume concrete cooling device for ultra-long and ultra-thick tunnel lining, installed on an inner formwork lining trolley.

[0021] Figure label:

[0022] 1. Outer mold lining trolley;

[0023] 2. Inner mold lining trolley;

[0024] 10. Top template; 101. Side template;

[0025] 20. Curved cooling water pipe; 201. Water inlet; 202. Drain outlet. Detailed Implementation

[0026] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0027] Please see Figures 1 to 3 In one embodiment, a cooling device for large-volume concrete in ultra-long and ultra-thick tunnel lining includes an outer lining template assembly, an inner lining template assembly, and a cooling assembly. Specifically, the outer lining template assembly is installed on the outer lining trolley 1; the inner lining template assembly is installed on the inner lining trolley 2; both the outer and inner lining template assemblies include a top template 10 and a side template 101, with the side templates 101 hinged to both ends of the top template 10 to form an arched structure; the cooling assembly includes an arc-shaped cooling water pipe 20, with arc-shaped cooling water pipes 20 provided on the side of the top template 10 and the side template 101 close to the concrete, arranged in an S-shape around the top template 10 and the side template 101, with an inlet 201 at one end and a drain 202 at the other end.

[0028] In the above embodiments, by setting the arc-shaped cooling water pipes 20 on the top template 10 and the side template 101, the arc-shaped cooling water pipes 20 can move forward synchronously with the lining trolley for cyclic construction, which facilitates the recycling of the arc-shaped cooling water pipes 20 and reduces construction costs. In addition, the arc-shaped cooling water pipes 20 are arranged in an S-shape along the top template 10 and the side template 101, which increases the contact area between the arc-shaped cooling water pipes 20 and the lining and improves the heat exchange efficiency. At the same time, the S-shaped structure can generate more turbulence in the cooling water within the arc-shaped cooling water pipes 20, which can transfer heat more efficiently.

[0029] Specifically, in the above embodiments, the arc-shaped cooling water pipe 20 is a steel pipe. It has high mechanical strength and can withstand greater pressure and external loads, thus preventing deformation of the arc-shaped cooling water pipe 20 during concrete pouring.

[0030] Based on the above embodiments, the cooling component further includes interface pipes, with both the water inlet 201 and the drain outlet 202 connected to interface pipes extending out of the top template 10 and the side template 101. By providing interface pipes extending out of the top template 10 and the side template 101, it is convenient to connect to external cooling water supply equipment via the interface pipes.

[0031] Based on the above embodiments, furthermore, the connections between the inlet 201 and the outlet 202 and the interface pipe are both covered with waterproof tape. This improves the sealing performance of the connections between the inlet 201 and the outlet 202 and the interface pipe, preventing water leakage at the connections.

[0032] Please see Figure 1 and Figure 2 In one embodiment, the curved cooling water pipe 20 is tightly embedded in the top formwork 10 and the side formwork 101, close to the concrete. The tight fit between the curved cooling water pipe 20 and the top formwork 10 and the side formwork 101 can expand the heat exchange area, thereby improving the cooling effect on the lining.

[0033] In one embodiment, a water valve for adjusting the flow rate is provided on the water inlet 201. By providing the water valve, the flow rate of cooling water entering the arc-shaped cooling water pipe 20 can be adjusted, which facilitates indirect adjustment of the lining cooling temperature as needed.

[0034] The specific implementation method of the above-mentioned cooling device for large-volume concrete lining of ultra-long and ultra-thick tunnels is as follows:

[0035] By connecting the external cooling water supply equipment to the inlet 201 and outlet 202 to form a loop, the external cooling water supply equipment is activated to deliver cooling water to the curved cooling water pipe 20. After flowing through the curved cooling water pipe 20, the water flows back to the external cooling water supply equipment from the outlet 202. The cooling water flowing through the curved cooling water pipe 20 can exchange heat with the lining, thereby achieving the purpose of cooling the lining. By installing the curved cooling water pipe 20 on the top formwork 10 and the side formwork 101, the curved cooling water pipe 20 can move with the lining trolley. The step-by-step cyclic construction facilitates the recycling of the arc-shaped cooling water pipes 20, reducing construction costs. Furthermore, the arc-shaped cooling water pipes 20 are arranged in an S-shape along the top formwork 10 and the side formwork 101, which increases the contact area between the arc-shaped cooling water pipes 20 and the lining, improving heat exchange efficiency. At the same time, the S-shaped structure allows the cooling water to generate more turbulence within the arc-shaped cooling water pipes 20, enabling more efficient heat transfer. Moreover, the flow rate of cooling water entering the arc-shaped cooling water pipes 20 can be controlled by adjusting the water valve, making it easy to indirectly adjust the lining cooling temperature as needed.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A cooling device for super-long and super-thick tunnel lining mass concrete, characterized in that, include: The outer lining template assembly is installed on the outer lining trolley (1); The inner lining template assembly is installed on the inner lining trolley (2); Both the outer lining template assembly and the inner lining template assembly include a top template (10) and side templates (101), with the side templates (101) hinged to both ends of the top template (10) to form an arched structure; and The cooling component includes an arc-shaped cooling water pipe (20). The top template (10) and the side template (101) are both provided with the arc-shaped cooling water pipe (20) on the side close to the concrete. The arc-shaped cooling water pipe (20) is arranged in an S-shape around the top template (10) and the side template (101). One end of the arc-shaped cooling water pipe (20) is provided with a water inlet (201) and the other end is provided with a drain outlet (202).

2. The cooling device for super-long and super-thick tunnel lining mass concrete according to claim 1, characterized in that, The arc-shaped cooling water pipe (20) is a steel pipe.

3. The cooling device for super-long and super-thick tunnel lining mass concrete according to claim 1, characterized in that, The arc-shaped cooling water pipe (20) is tightly embedded in the top template (10) and the side template (101) close to the concrete surface.

4. The cooling device for super-long and super-thick tunnel lining mass concrete according to claim 1, characterized in that, The cooling component also includes an interface pipe, and the water inlet (201) and the drain outlet (202) are both connected to an interface pipe that extends out of the top template (10) and the side template (101).

5. The cooling device for super-long and super-thick tunnel lining mass concrete according to claim 4, characterized in that, The connection points between the water inlet (201) and the water outlet (202) and the interface pipe are all covered with waterproof tape.

6. The cooling device for super-long and super-thick tunnel lining mass concrete according to claim 1, characterized in that, The inlet (201) is equipped with a water valve for adjusting the flow rate.

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