Shield tunnel ventilation device

Abstract

The utility model discloses a ventilation device for a shield tunnel, which belongs to the technical field of tunnel construction and comprises a supporting platform fixedly connected with a duct piece on one side of the tunnel; the fan bracket is fixedly mounted at the upper end of the supporting platform; and the axial flow fan is mounted on the fan bracket. The shield tunnel ventilation device provided by the utility model solves the problems of high tunnel temperature, poor air quality and the like, and by arranging the ventilation device on the tunnel segment, the air circulation in the tunnel is enhanced, the temperature and the air quality in the tunnel are ensured to reach the standard, and a good working environment is provided for shield constructors.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel construction technology, and specifically relates to a ventilation device for shield tunnels. Background Technology

[0002] At present, during shield tunneling construction, the only ventilation in the tunnel is supplied by a set of high-power axial flow fans installed at the tunnel entrance. The working environment temperature for shield tunneling operators is generally between 38° and 45°. Due to the long tunnel or hard strata (rock), the equipment operates under high load for a long time, resulting in even higher temperatures in the shield machine area and a poor working environment.

[0003] I. High environmental risks

[0004] 1. Working in long tunnels or tunnels with many rocks in coastal cities is subject to high temperatures. Operators often carry "Huoxiang Zhengqi Water" (a traditional Chinese medicine for heatstroke), but due to the high temperatures, heatstroke is still common among operators.

[0005] 2. Due to the high temperature inside the tunnel and poor air circulation, operators may experience oxygen deficiency and other issues if they work in this environment for a long time, which can easily cause damage to their physical and mental health.

[0006] II. High staff turnover

[0007] Operators working in high-temperature environments for extended periods are prone to irritability and other emotional issues, leading to high staff turnover and significantly impacting production and quality. Utility Model Content

[0008] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0009] A ventilation device for a shield tunnel, comprising:

[0010] A support platform is fixedly connected to a tunnel segment on one side.

[0011] A fan bracket, which is fixedly installed on the upper end of the support platform;

[0012] An axial flow fan is mounted on the fan bracket.

[0013] Furthermore, the support platform includes a base platform, a bottom cross frame, and a support frame. The bottom cross frame is fixedly connected to the lower end of the base platform. The first end of the support frame is fixedly connected to the bottom cross frame, and the second end is fixedly connected to a tunnel segment on one side. The side of the bottom cross frame away from the center of the tunnel is fixedly connected to the tunnel segment through a connector.

[0014] Furthermore, the second end of the support frame and the connector are both fixedly installed in the bolt holes of the fixed tube segment.

[0015] Furthermore, the support frame is located in the middle of the bottom horizontal frame.

[0016] Furthermore, a diagonal brace is provided between the support frame and the bottom horizontal frame. One end of the diagonal brace is fixedly connected to a non-end position of the support frame, and the other end is fixedly connected to a non-end position of the bottom horizontal frame.

[0017] Furthermore, the diagonal brace is located on the side closer to the center of the tunnel.

[0018] Furthermore, the fan bracket is provided with a fan outer wall barrel on the side away from the base platform, the axial flow fan is installed inside the fan outer wall barrel, and fan motor shaft covers are provided at both ends of the fan outer wall barrel along the axial direction.

[0019] Beneficial effects:

[0020] The shield tunnel ventilation device provided by this utility model solves the problems of high tunnel temperature and poor air quality. By installing ventilation devices on the tunnel segments, the air circulation in the tunnel is enhanced, ensuring that the temperature and air quality in the tunnel meet the standards, and providing a good working environment for shield tunneling workers. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of a ventilation device for a shield tunnel;

[0022] Figure 2 This is a schematic diagram of a ventilation device for a shield tunnel from another perspective.

[0023] Figure 3 This is a front view schematic diagram of a ventilation device for a shield tunnel;

[0024] The components include: 1. outer wall of the fan; 2. base platform; 3. bottom horizontal frame; 4. support frame; 5. fan motor shaft cover; 6. fan bracket; 7. connector; 8. diagonal brace; and 9. axial flow fan. Detailed Implementation

[0025] This utility model provides a ventilation device for shield tunnels. The technical solution of this utility model will be described in detail below with reference to the accompanying drawings to make it easier to understand and master.

[0026] Example 1

[0027] This embodiment takes the standardized construction of the Xiamen-Zengzhou section of the first construction zone of the southern extension of Xiamen Rail Transit as an example.

[0028] refer to Figure 1-3 A ventilation device for a shield tunnel, comprising:

[0029] The support platform is fixedly connected to the tunnel lining segments on one side.

[0030] Fan bracket 6, the fan bracket 6 is fixedly installed on the upper end of the support platform;

[0031] Axial flow fan 9 is mounted on fan bracket 6.

[0032] In this embodiment, the support platform includes a base platform 2, a bottom horizontal frame 3, and a support frame 4. The bottom horizontal frame 3 is fixedly connected to the lower end of the base platform 2. The first end of the support frame 4 is fixedly connected to the bottom horizontal frame 3, and the second end is fixedly connected to a tunnel segment on one side. The side of the bottom horizontal frame 3 away from the center of the tunnel is fixedly connected to the tunnel segment through a connector 7.

[0033] In this embodiment, the second end of the support frame 4 and the connector 7 are both fixedly installed in the bolt holes of the fixed tube segment.

[0034] In this embodiment, the support frame 4 is located in the middle of the bottom horizontal frame 3.

[0035] In this embodiment, a diagonal brace 8 is provided between the support frame 4 and the bottom horizontal frame 3. One end of the diagonal brace 8 is fixedly connected to the non-end position of the support frame 4, and the other end is fixedly connected to the non-end position of the bottom horizontal frame 3.

[0036] In this embodiment, the diagonal brace 8 is located on the side closer to the center of the tunnel.

[0037] In this embodiment, a fan outer wall barrel 1 is provided on the side of the fan bracket 6 away from the base platform 2, an axial flow fan 9 is installed inside the fan outer wall barrel 1, and fan motor shaft covers 5 are provided at both ends of the fan outer wall barrel 1 along the axial direction.

[0038] Specifically, the outer wall of the fan 1 is φ800, the fan bracket 6 is welded from angle iron, the base platform 2 is a thin iron plate of 850*850, the bottom cross frame 3 is made of four 600mm long 25 square tubes connected end to end and welded together, the support frame 4 is two 650mm long 25 square tubes spaced apart, the connector 7 is a 25 square steel with flat end modified, and the diagonal brace 8 is a 25 angle iron.

[0039] During the construction of the Xiamen-Zengzhou section of the southern extension of Xiamen Rail Transit, a set of shield tunnel ventilation devices provided in this embodiment is installed every 50 rings and 75 meters in the tunnel. The air outlet faces the tunnel entrance, that is, it is installed on the right side of the tunnel segment to form a wind circulation in the tunnel.

[0040] After on-site installation, a thermometer was placed inside the tunnel, and the actual temperature inside the tunnel was 30℃; a handheld anemometer measured the wind speed at 1 m / s; the overall working environment inside the tunnel was comfortable, and the temperature was lower than in previous tunnels.

[0041] Application: This method was applied in various sections of the Xiamen Metro Line 3 South Extension Project, Section 1. Throughout the application process, it fully demonstrated the advantages of small innovations in engineering projects, reducing tunnel temperature, improving air quality, providing a good working environment for tunnel boring machine (TBM) workers, and enhancing the standardization of TBM construction.

[0042] Economic benefits:

[0043] Platform production material cost: ≈1391 yuan.

[0044] Labor cost: 1 * 350 = 350 yuan.

[0045] Total: 1391 + 350 = 1741 yuan.

[0046] Social benefits: The temperature inside the tunnel has been reduced and the air quality has been improved. This was achieved through a special design before the project started, which was dedicated to improving the construction environment inside the tunnel, thereby reducing personnel loss and improving construction safety and quality. It has been well received by the project manager and relevant owners, and is also being actively promoted and applied in other projects.

[0047] The technical solution of this utility model has been fully described above. It should be noted that the specific implementation of this utility model is not limited to the above description. All technical solutions formed by those skilled in the art based on the spirit of this utility model by adopting equivalent transformations or equivalent transformations in terms of structure, method or function shall fall within the protection scope of this utility model.

Claims

1. A ventilation device for a shield tunnel, characterized in that, include: A support platform is fixedly connected to a tunnel segment on one side. A fan bracket, which is fixedly installed on the upper end of the support platform; An axial flow fan, wherein the axial flow fan is mounted on the fan bracket; The support platform includes a base platform, a bottom cross frame, and a support frame. The bottom cross frame is fixedly connected to the lower end of the base platform. The first end of the support frame is fixedly connected to the bottom cross frame, and the second end is fixedly connected to a tunnel segment on one side. The side of the bottom cross frame away from the center of the tunnel is fixedly connected to the tunnel segment through a connector.

2. The shield tunnel ventilation device according to claim 1, characterized in that, The second end of the support frame and the connector are both fixedly installed in the bolt holes of the fixed tube segment.

3. The shield tunnel ventilation device according to claim 1, characterized in that, The support frame is located in the middle of the bottom horizontal frame.

4. The shield tunnel ventilation device according to claim 3, characterized in that, A diagonal brace is provided between the support frame and the bottom horizontal frame. One end of the diagonal brace is fixedly connected to a non-end position of the support frame, and the other end is fixedly connected to a non-end position of the bottom horizontal frame.

5. The shield tunnel ventilation device according to claim 4, characterized in that, The diagonal brace is located on the side closer to the center of the tunnel.

6. The shield tunnel ventilation device according to claim 1, characterized in that, The fan bracket has a fan outer wall barrel on the side away from the base platform. The axial flow fan is installed inside the fan outer wall barrel. Fan motor shaft covers are provided at both ends of the fan outer wall barrel along the axial direction.

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