Safety protection door of tunnel connection channel

Abstract

The utility model discloses a safety protection door of a tunnel connection channel, which comprises a concrete pipe piece and a protection door frame, a safety protection door is hinged on the protection door frame, an opening of the protection door frame is formed in front of the concrete pipe piece, and an arc-shaped steel base plate is arranged on the inner side of the protection door frame. The shape of the steel base plate is attached to the shape of the concrete pipe piece, the steel base plate and the concrete pipe piece are connected through the base plate fixing bolts, and the door frame and the steel base plate are welded in a close attaching mode. The inner wall of the protective door frame is slidably connected with an arc plate, an arc groove allowing the arc plate to slide along the front side of the steel base plate is formed in the inner side of the protective door frame, and cutting blades are fixed to the two ends, close to the steel base plate, of the arc plate. The situation of later water leakage is effectively avoided, operation is easy, the material repeated utilization rate is high, safety and controllability are achieved, cost is relatively low, and all protective door materials can be repeatedly used.

Description

Technical Field

[0001] The embodiments of the utility model belong to the technical field of tunnel protection equipment, and more specifically, relate to a safety protection door for a tunnel communication passage. Background Art

[0002] With the development of the national economy, subways, as fast, large-capacity, and green transportation, have become the main mode of transportation in large and medium-sized cities. At present, domestic subway section lines are mainly laid in the form of underground double-line shield tunnels. Section communication channels are used to ensure the safe evacuation of passengers, tunnel drainage, fire prevention, and firefighting. The safety risks during the construction process are relatively large, especially for communication channels constructed in water-rich sand layers using the freezing method. Safety protection doors are a key link in the construction and the final guarantee of safety. Safety protection doors are generally installed on special steel pipe segments.

[0003] At present, the main design of the safety protection door of the communication channel is to design the pipe segments of the communication channel tunnel door as steel pipe segments, and the protection door is installed on the steel pipe segments. The steel pipe segments of the tunnel door are not removed for sealing in the later stage. This method has many construction processes and there is a risk of water leakage between the steel pipe segments and the concrete pipe segments in the later stage.

[0004] In addition, the steel pipe segments in the traditional connection channel are made according to the size of the concrete pipe segments, and the installation is the same as the concrete pipe segments. During the construction of the connection channel, the safety protection door frame is installed around the steel pipe segments. When the middle steel pipe segment is opened, it is permanently removed, and a circle of steel pipe segments are retained for the connection channel door. After the construction of the connection channel is completed, the steel pipe segments are filled with high-grade waterproof concrete. The price of steel pipe segments is relatively expensive and needs to be prefabricated in advance according to the segment model. After the construction of the connection channel is completed, the reuse rate is less than 50%. With the long-term action of water vapor in the tunnel, water seepage occurs in the gaps between the steel pipe segments and the concrete segments and the second lining concrete of the connection channel. The difficulty of plugging leaks and replacing the segments after they are corroded in the later stage affects the structural safety. Utility Model Content

[0005] In view of the above defects or improvement needs of the prior art, the utility model provides a safety protection door for a tunnel communication passage, including a concrete pipe segment and a protection door frame, a safety protection door is hingedly installed on the protection door frame, an opening of the protection door frame is released in front of the concrete pipe segment, an arc-shaped steel pad is arranged on the inner side of the protection door frame, the shape of the steel pad is matched with the shape of the concrete pipe segment, the steel pad and the concrete pipe segment are connected by pad fixing bolts, and the door frame and the steel pad are tightly welded; an arc plate is slidably connected to the inner wall of the protection door frame, an arc groove is opened on the inner side of the protection door frame for the arc plate to slide along the front side of the steel pad, cutting blades are fixed at both ends of the arc plate close to the steel pad, a pull ring is fixed at the bottom of the arc plate, and placement blocks are fixed at both ends of the inner wall of the protection door frame, a cross baffle is placed on the placement block, and an insertion strip is fixed on the cross baffle, the shape of the insertion strip is matched with the shape of the inner ring of the pull ring, and the placement block and the arc plate are misaligned along the sliding route of the arc groove.

[0006] Furthermore, a cross-shaped reinforcing rib is welded on the inner side of the safety protection door, and the vertical height and horizontal width of the reinforcing rib are the same as the inner edge height and width of the protection door frame.

[0007] Furthermore, a visual window is provided on the safety protection door, and an opening and closing window is hinged on the visual window.

[0008] Furthermore, a lock bracket is arranged on the side of the protective door frame, a bracket bolt frame is fixed on the outer wall of the lock bracket, a protective bolt frame is fixed on the outer wall of the safety protection door on the side of the visible window, a bolt plate is arranged and is slidably connected to the bracket bolt frame, and the bolt plate can pass through the bracket bolt frame and the protective bolt frame horizontally, and the bolt plate can extend to the front of the opening and closing window.

[0009] Furthermore, a lighting tube is installed on the inner side of the safety protection door, and the lower end of the opening and closing window is installed on the lighting tube.

[0010] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0011] 1. The steel pad (arc shape closely fits the concrete segment) is directly installed on the concrete segment through the pad fixing bolts. Later, the steel bar is planted on the hole segment and the second lining concrete of the communication channel is poured as a whole at the same time, which effectively avoids the occurrence of water leakage in the later stage. The operation is simple, the material reuse rate is high, and it is safe and controllable.

[0012] 2. The construction process is safe and controllable, and the cost is relatively lower (the cost of traditional steel pipe segments is about 50,000, and the cost of the steel pad and pad fixing bolt combination is about 5,000). It is easy to handle, reducing the risk of structural safety, and the protective door materials can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a schematic diagram of the overall internal structure of the utility model;

[0014] Figure 2 It is a side view schematic diagram of the internal structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the overall external structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the connection structure of the arc plate in the utility model;

[0017] Figure 5 It is a schematic diagram of the connection structure of the horizontal baffle in the utility model.

[0018] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. Concrete pipe segment; 2. Protective door frame; 3. Safety protection door; 4. Steel pad; 5. Pad fixing bolt; 6. Reinforcement rib; 7. Opening and closing window; 8. Lock bracket; 9. Bracket bolt frame; 10. Protective door bolt frame; 11. Door bolt plate; 12. Lighting tube; 13. Arc plate; 14. Cutting blade; 15. Pull ring; 16. Placement block; 17. Cross baffle; 18. Insert strip. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] like Figure 1-Figure 3 As shown, the utility model provides a safety protection door for a tunnel communication passage, such as Figure 1 and Figure 2 As shown, it includes a concrete segment 1 and a protective door frame 2, a safety protective door 3 is hingedly installed on the protective door frame 2, an opening of the protective door frame 2 is released in front of the concrete segment 1, and an arc-shaped steel pad 4 is arranged on the inner side of the protective door frame 2. The shape of the steel pad 4 fits the shape of the concrete segment 1, and the steel pad 4 and the concrete segment 1 are connected by pad fixing bolts 5, and the door frame 2 and the steel pad 4 are closely welded; the steel pad 4 (the arc is closely fitted with the concrete segment 1) is directly installed on the concrete segment 1 by the pad fixing bolts 5, and later on, by planting reinforcement on the hole segment and pouring the second lining concrete of the communication channel as a whole, water leakage in the later stage can be avoided, the operation is simple, the material reuse rate is high, and it is safe and controllable;

[0021] The specific operations are as follows:

[0022] S100, before constructing the communication channel, a hole opening position is placed on the concrete segment 1;

[0023] S200, fixing the steel plate 4 on the concrete segment 1 with the plate fixing bolts 5 according to the layout position;

[0024] S300, the protective door frame 2 and the steel backing plate 4 are tightly welded;

[0025] S400, after the second lining of the communication channel is completed, the safety protection door 3 and the steel pad 4 are removed, and the pad fixing bolts 5 are cut off and sealed with mortar.

[0026] like Figures 1 to 5 As shown, in this embodiment, an arc plate 13 is slidably connected to the inner wall of the protective door frame 2, and an arc groove is provided on the inner side of the protective door frame 2 for the arc plate 13 to slide along the front side of the steel pad 4. Cutting blades 14 are fixed to the two ends of the arc plate 13 close to the steel pad 4, and a pull ring 15 is fixed to the bottom of the arc plate 13. Placement blocks 16 are fixed to the two ends of the inner wall of the protective door frame 2, and a cross baffle 17 is placed on the placement block 16. An insertion strip 18 is fixed on the cross baffle 17. The shape of the insertion strip 18 is adapted to the shape of the inner circle of the pull ring 15, and the placement block 16 and the arc plate 13 are misaligned along the sliding route of the arc groove; in the process of removing the steel pad 4, due to the protective door frame 2 and the steel pad 4 Close welding can be achieved by removing the cross baffle 17 and the insert 18 so that the cross baffle 17 no longer supports the arc plate 13 (when it is not in the final state of removal, the cross baffle 17 is placed on the placement block 16, and the insert 18 is inserted into the pull ring 15 of the arc plate 13 to form a connection between the arc plate 13 and the cross baffle 17, and the insert 18 of the cross baffle 17 is supported by the pull ring 15 to support the arc plate 13 to prevent the arc plate 13 from moving and causing wear of the cutting blade 14), and then pulling the pull ring 15 to drive the arc plate 13 to slide along the arc groove, and the cutting blade 14 can cut and separate the welding point between the steel pad 4 and the protective door frame 2, so that the steel pad 4 is separated from the protective door frame 2.

[0027] like Figure 1 As shown, in this embodiment, a cross-shaped reinforcing rib 6 is welded on the inner side of the safety protection door 3, and the vertical height and lateral width of the reinforcing rib 6 are the same as the inner edge height and width of the protection door frame 2; so as to enhance the overall safety between the safety protection door 3 and the protection door frame 2 when the safety protection door 3 is closed.

[0028] like Figure 1 and Figure 3As shown, in this embodiment, a visual window is provided on the security door 3, and an opening and closing window 7 is hinged on the visual window; a lighting tube 12 is installed on the inner side of the security door 3, and the lower end of the opening and closing window 7 is installed on the lighting tube 12; the inside of the security door 3 can be monitored and inspected by opening the opening and closing window 7, and the lighting tube 12 can be opened to facilitate observation in a dark environment; a lock bracket 8 is provided on the side of the protection door frame 2, and a bracket bolt frame 9 is fixed to the outer wall of the lock bracket 8, and the outer wall of the security door 3 is on the side of the visual window. A protective bolt frame 10 is fixed on the side, and a bolt plate 11 is provided to be slidably connected to the bracket bolt frame 9, and the bolt plate 11 can pass through the bracket bolt frame 9 and the protective bolt frame 10 horizontally, and the bolt plate 11 can extend to the front of the opening and closing window 7; the safety protection door 3 can be locked by the bolt plate 11, so that the safety protection door 3 will not easily separate from the protective door frame 2, and the bolt plate 11 can slide in front of the opening and closing window 7 to synchronously seal the opening and closing window 7, and the opening and closing window 7 or the safety protection door 3 can be selectively opened by adjusting the bolt plate 11.

[0029] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A safety protection door for a tunnel communication passage, comprising a concrete segment (1) and a protection door frame (2), wherein a safety protection door (3) is hingedly mounted on the protection door frame (2), characterized in that: The front of the concrete segment (1) is provided with an opening of the protective door frame (2), and an arc-shaped steel pad (4) is arranged on the inner side of the protective door frame (2). The shape of the steel pad (4) matches the shape of the concrete segment (1), and the steel pad (4) and the concrete segment (1) are connected by pad fixing bolts (5). The door frame (2) and the steel pad (4) are tightly welded; the inner wall of the protective door frame (2) is slidably connected with an arc plate (13), and the inner side of the protective door frame (2) is provided with a slot for the arc plate (13) to move along the steel pad (4) an arc groove for front side sliding, cutting blades (14) are fixed at both ends of the arc plate (13) close to the steel pad (4), a pull ring (15) is fixed at the bottom of the arc plate (13), and a placement block (16) is fixed at both ends of the inner wall of the protective door frame (2), a transverse baffle (17) is placed on the placement block (16), and an insertion strip (18) is fixed on the transverse baffle (17), and the shape of the insertion strip (18) is adapted to the shape of the inner circle of the pull ring (15), and the placement block (16) and the arc plate (13) are offset along the sliding route of the arc groove.

2. A safety protection door for a tunnel communication passage according to claim 1, characterized in that: A cross-shaped reinforcing rib (6) is welded on the inner side of the safety protection door (3), and the vertical height and horizontal width of the reinforcing rib (6) are the same as the inner edge height and width of the protection door frame (2).

3. A safety protection door for a tunnel communication passage according to claim 1, characterized in that: The safety protection door (3) is provided with a visual window, and an opening and closing window (7) is hingedly connected to the visual window.

4. A safety protection door for a tunnel communication passage according to claim 3, characterized in that: A lock bracket (8) is arranged on the side of the protective door frame (2), a bracket bolt frame (9) is fixed to the outer wall of the lock bracket (8), a protective door bolt frame (10) is fixed to the outer wall of the safety protection door (3) on the side of the visual window, a door bolt plate (11) is arranged and slidably connected to the bracket bolt frame (9), and the door bolt plate (11) can pass through the bracket bolt frame (9) and the protective door bolt frame (10) horizontally, and the door bolt plate (11) can extend to the front of the opening and closing window (7).

5. The safety protection door for a tunnel communication passage according to claim 3, characterized in that: A lighting tube (12) is installed inside the safety protection door (3), and the lighting tube (12) is installed with the lower end of the opening and closing window (7).

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