Lining structure of fireproof door of transverse traffic channel applied to extremely high ground stress

Abstract

The utility model discloses a fireproof door lining structure of a vehicle transverse passage applied to extremely high ground stress, which comprises a fixing buckle, a primary support layer arranged along the passage, a secondary lining layer arranged on the inner side of the primary support layer, and a composite waterproof layer arranged between the primary support layer and the secondary lining layer, the primary support layer comprises a plurality of support steel frames which are equiaxially arranged along the tunnel, longitudinal connecting ribs for connecting the adjacent support steel frames, and concrete for filling the support steel frames; the supporting steel frame is made of I-shaped steel, a plurality of pairs of connecting holes are equiaxially formed in a web of the I-shaped steel, first bolts are arranged in the connecting holes and connected with the fixing buckles, and the two ends of the longitudinal connecting ribs are connected with the fixing buckles. The supporting steel frame is connected with the longitudinal connecting ribs through the fixing buckles, the longitudinal connecting ribs are rectangular and are formed by supporting connection of two steel bars, and compared with existing supporting connection of one steel bar, the supporting steel frame has larger bearing capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a lining structure of a fireproof door of a vehicle transverse passage applied to extremely high ground stress. Background Art

[0002] In highway tunnel projects, the vehicle cross passage, as an important emergency evacuation passage, plays a vital role in ensuring the safe operation of the tunnel. The fire door section of the vehicle cross passage, as a key part, not only needs to provide effective fire isolation in an emergency, but also needs to withstand various stresses that may occur in the tunnel.

[0003] In existing tunnel construction, the support steel frame connection of the fire door support system of the vehicle cross passage is to weld the connecting sleeves on both sides of the web, and set right-angle hooks at both ends of the longitudinal connecting ribs to insert into the connecting sleeves to complete the connection of adjacent support steel frames. Although such support steel frame construction may meet basic structural requirements under general geological conditions, its applicability is greatly challenged under extremely high ground stress. Extremely high ground stress may cause serious deformation and cracks in the tunnel structure, which may cause the connecting sleeve to fall off and the longitudinal connecting rib to lose support. In addition, the connecting sleeve is generally welded on-site, and the welding habits and techniques of each construction worker are different, which will cause the weak parts of the tunnel to collapse when the tunnel is deformed, affecting the overall stability of the tunnel. Utility Model Content

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a lining structure of a fire door in a vehicle transverse passage for extremely high ground stress, including a fixing buckle, an initial support layer arranged along the passage, a secondary lining layer arranged on the inner side of the initial support layer, and a composite waterproof layer arranged between the initial support layer and the secondary lining layer; the initial support layer includes a plurality of supporting steel frames equiaxially arranged along the tunnel, longitudinal connecting ribs connecting adjacent supporting steel frames, and concrete filled with the supporting steel frames; the supporting steel frames are made of I-beams, and a plurality of pairs of connecting holes are equiaxially arranged on the web of the I-beams, and a first bolt is arranged in the connecting hole to be connected to the fixing buckle; both ends of the longitudinal connecting ribs are connected to the fixing buckle.

[0005] Preferably, the fixing buckle includes an n-shaped portion, connecting plates are horizontally provided on both sides of the n-shaped portion, a through hole is provided on the connecting plate and is concentrically aligned with the connecting hole, and the first bolt is provided in the through hole; the longitudinal connecting rib is in a rectangular frame shape, and both ends of the longitudinal connecting rib are provided in the n-shaped portion.

[0006] Preferably, the secondary lining layer includes: reinforcement arranged inside and concrete filling the reinforcement.

[0007] Preferably, the reinforcement cross-sectional structure is n-shaped, and a plurality of the reinforcements are equiaxially arranged along the tunnel. The reinforcements include: four main bars arranged in a rectangular array with cross-sections, and a plurality of stirrups equiaxially arranged along the main bars, wherein the stirrups are made of a steel bar, and bent hooks are provided at both ends of the steel bar to connect the main bars.

[0008] Preferably, the cross-section of the supporting steel frame is n-shaped, including an arched area located at the top and a B area erected on both sides of the A area.

[0009] Preferably, the A area and the B area are provided with a connecting structure, and the connecting structure includes: a first connecting steel plate provided on the end surface of the A area, and a second connecting steel plate provided on the upper end surface of the B area, and the first connecting steel plate and the second connecting steel plate are both provided with circular holes at four corners, and second bolts are provided in the circular holes to fix the first connecting steel plate and the second connecting steel plate.

[0010] Preferably, the top and the facade of the supporting steel frame are provided with grouting anchor rods, the side walls of the grouting anchor rods are provided with equiaxially arranged grouting holes, and the grouting anchor rods are provided with an upward elevation angle of 5-15°.

[0011] Preferably, the initial supporting layer also includes tunnel surrounding rock outside the supporting steel frame, and a cushion block is provided between the tunnel surrounding rock and the supporting steel frame.

[0012] Preferably, a locking foot guide is provided at the upper end of the B zone.

[0013] Preferably, the composite waterproof layer includes geotextile and PVC waterproof board.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The supporting steel frame of the utility model is connected to the longitudinal connecting ribs by fixing buckles. The longitudinal connecting ribs are rectangular and are supported and connected by two steel bars. Compared with the existing single steel bar support connection, they have greater bearing capacity. At the same time, the fixing buckles are connected to the I-beam bolts. Compared with on-site welding, the welding differences between construction workers can be eliminated, making the supporting steel frame more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the fire door lining structure for vehicle cross passages applied to extremely high ground stress;

[0017] Figure 2 This is a schematic diagram of the cross-section structure of the supporting steel frame;

[0018] Figure 3 It is a structural schematic diagram of the longitudinal connection of the I-beam from the first perspective;

[0019] Figure 4 for Figure 3 An enlarged schematic diagram of point A;

[0020] Figure 5 It is a schematic diagram of the longitudinal connection structure of the I-beam from the second viewing angle;

[0021] Figure 6 is a schematic diagram of the structure of the fixing buckle;

[0022] Figure 7 This is a schematic diagram of the connection structure between area A and area B;

[0023] Figure 8 is a structural schematic diagram of a first connecting steel plate;

[0024] Fig. 9 It is the structural diagram of the reinforcement section;

[0025] Fig.10 for Fig. 9 Schematic diagram of the structure at B;

[0026] Fig.11 is a cross-sectional schematic diagram of the first type of cushion block;

[0027] Fig.12 This is a cross-sectional schematic diagram of the first type of pad.

[0028] In the figure: initial support layer 1, secondary lining layer 2, support steel frame 3, longitudinal connecting ribs 4, I-beams 5, fixing buckles 6, connecting plates 7, reinforcement 8, main reinforcement 9, stirrups 10, area A 11, area B 12, first connecting steel plate 13, second connecting steel plate 14, round holes 15, second bolts 16, grouting anchor rods 17, tunnel surrounding rock 18, locking foot guide tubes 19, composite waterproof layer 20, first bolts 21, cement concrete pavement 22, installation profile 23, locking foot anchor rods 24. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] See also Figures 1 to 12This embodiment provides a fire door lining structure for a vehicle transverse passage with extremely high ground stress, including an initial support layer 1 arranged along the passage, a secondary lining layer 2 arranged inside the initial support layer 1, and a composite waterproof layer 20 arranged between the initial support layer 1 and the secondary lining layer 2; the initial support layer 1 includes a plurality of support steel frames 3 arranged equiaxially along the tunnel, longitudinal connecting ribs 4 connecting adjacent support steel frames 3, and concrete filled with the support steel frames 3; the support steel frames 3 are made of I-beams 5, and a plurality of pairs of connecting holes are equiaxially arranged on the web of the I-beams 5, and a first bolt 21 is arranged in the connecting hole to connect with the fixing buckle 6, and both ends of the longitudinal connecting rib 4 are connected with the fixing buckle 6. During construction, the initial support layer 1 is constructed first, and then the secondary lining layer 2 is constructed. The exit of the initial support layer 1 and the secondary lining layer 2 is built with a fire door installation profile 23.

[0031] The fixing buckle 6 includes an n-shaped portion, and connecting pieces 7 are horizontally arranged on both sides of the n-shaped portion. The connecting piece 7 is provided with a through hole concentrically aligned with the connecting hole, and the through hole is provided with the first bolt 21; the longitudinal connecting rib 4 is in a rectangular frame shape, and the two ends of the longitudinal connecting rib 4 are arranged in the n-shaped portion. During construction, the longitudinal connecting rib 4 is placed between the supporting steel frames 3, and the n-shaped portion is clamped at the two ends of the longitudinal connecting rib 4 and connected to the I-beam 5 with the first bolt 21. After the construction of the supporting steel frame 3 is completed, a layer of concrete is sprayed and filled.

[0032] The secondary lining layer 2 includes: reinforcement 8 arranged inside, and concrete filled with the reinforcement 8. The cross-sectional structure of the reinforcement 8 is n-shaped, and a plurality of the reinforcements 8 are arranged equiaxially along the tunnel. The reinforcement 8 includes: four main reinforcements 9 arranged in a rectangular array with cross sections, and a plurality of stirrups 10 arranged equiaxially along the main reinforcements 9. The stirrups 10 are made of a steel bar, and the two ends of the steel bar are provided with bent hooks to connect the main reinforcements 9. The function of the reinforcement 8 is mainly to improve the stress performance of the concrete component, prevent the concrete from cracking prematurely, and improve the bearing capacity and durability of the component. The reinforcement 8 is a key supporting structure in geological conditions with extremely high ground stress.

[0033] The cross section of the support steel frame 3 is n-shaped, including an arched A zone 11 arranged at the top, and a B zone 12 arranged on both sides of the A zone 11. The support steel frame 3 is made of I-beam 5, and the A zone 11 and the B zone 12 are provided with a connection structure, which includes: a first connection steel plate 13 arranged on the end surface of the A zone 11, and a second connection steel plate 14 arranged on the upper end surface of the B zone 12. The first connection steel plate 13 and the second connection steel plate 14 are both provided with circular holes 15 at four corners, and the circular holes 15 are provided with second bolts 16 to fix the first connection steel plate 13 and the second connection steel plate 14. The support steel frame 3 is divided into the A zone 11 and the B zone 12 and connected by the connection structure, so that the support steel frame 3 can be easily transported into the channel for construction.

[0034] The top and facade of the support steel frame 3 are provided with grouting anchor rods 17, and the side walls of the grouting anchor rods 17 are provided with equiaxially arranged grouting holes, and the grouting anchor rods 17 are provided with an upward elevation angle of 5-15°. The grouting anchor rods 17 of the top A zone 11 are arranged along the arch radial direction, and the grouting anchor rods 17 of the B zone 12 are arranged on the tunnel facade, and the grouting anchor rods 17 are arranged in a plum blossom shape. The grouting anchor rods 17 are used to inject grouting materials to make the drilled space and form an integral body with the stratum, thereby enhancing the stability and durability of the stratum and improving the bearing capacity of the stratum. After grouting, the grouting anchor rods 17 of the A zone 11 support the top of the tunnel to prevent the top of the tunnel from collapsing. After grouting, the grouting anchor rods 17 of the B zone 12 support the facade of the tunnel and prevent the tunnel from settling.

[0035] The initial support layer 1 also includes the tunnel surrounding rock 18 outside the support steel frame 3, and a cushion block is provided between the tunnel surrounding rock 18 and the support steel frame 3. The cushion block is used to make the support steel frame 3 in close contact with the tunnel surrounding rock 18, thereby increasing the stability of the support steel frame 3. The cushion block has two shapes, the first is a wedge shape, and the second is a groove shape.

[0036] The upper end of the B zone 12 is provided with a locking foot conduit 19. The locking foot conduit 19 is mainly used to bear and transmit ground pressure and conduct the force of the supporting structure to prevent the supporting steel frame 3 from sinking.

[0037] Foot locking anchor rods 24 are symmetrically arranged in the middle and on both sides of the A zone, and foot locking anchor rods 24 are also arranged in the upper and lower positions and in the middle of the B zone.

[0038] The composite waterproof layer 20 includes geotextile and PVC waterproof board, which is used to prevent water seepage in the tunnel.

[0039] The A area 11 is provided with a first positioning steel bar, and each of the B areas 12 is provided with a second positioning steel bar. There are two first positioning steel bars and two second positioning steel bars, respectively, which are used to facilitate and accurately arrange each bracket.

[0040] The bottom of the lining structure of the fire door of the vehicle cross passage used for extremely high ground stress is also provided with a cement concrete pavement 22, including: a C20 concrete base layer, a C15 backfill layer and a C20 concrete bottom layer.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lining structure for a fire door in a vehicle cross passage with extremely high ground stress, comprising a fixing buckle (6), characterized in that: The invention comprises an initial support layer (1) arranged along a passage, a secondary lining layer (2) arranged inside the initial support layer (1), and a composite waterproof layer (20) arranged between the initial support layer (1) and the secondary lining layer (2); the initial support layer (1) comprises a plurality of support steel frames (3) arranged equiaxially along the tunnel, longitudinal connecting ribs (4) connecting adjacent support steel frames (3), and concrete filling the support steel frames (3); the support steel frames (3) are made of I-beams (5), a plurality of pairs of connecting holes are equiaxially arranged on the web of the I-beams (5), and first bolts (21) are arranged in the connecting holes and connected to the fixing buckles (6); and both ends of the longitudinal connecting ribs (4) are connected to the fixing buckles (6).

2. The lining structure of a fire door for a vehicle cross passage with extremely high ground stress according to claim 1 is characterized in that: The fixing buckle (6) comprises an n-shaped portion, connecting plates (7) are horizontally arranged on both sides of the n-shaped portion, a through hole is arranged on the connecting plate (7) and is concentrically aligned with the connecting hole, and the first bolt (21) is arranged in the through hole; the longitudinal connecting rib (4) is in the shape of a rectangular frame, and both ends of the longitudinal connecting rib (4) are arranged in the n-shaped portion.

3. The lining structure of a fire door for a vehicle cross passage with extremely high ground stress according to claim 1 is characterized in that: The secondary lining layer (2) comprises: reinforcement (8) arranged inside, and concrete filling the reinforcement (8).

4. The lining structure of a fire door for a vehicle cross passage with extremely high ground stress according to claim 3 is characterized in that: The cross-sectional structure of the reinforcement (8) is n-shaped, and a plurality of the reinforcements (8) are equiaxially arranged along the tunnel. The reinforcement (8) comprises: four main reinforcements (9) arranged in a rectangular array with cross-sections, and a plurality of reinforcement stirrups (10) equiaxially arranged along the main reinforcements (9). The reinforcement stirrups (10) are made of a steel bar, and bent hooks are provided at both ends of the steel bar to connect with the main reinforcement (9).

5. The lining structure of a fire door for a vehicle cross passage with extremely high ground stress according to claim 1 is characterized in that: The support steel frame (3) has an n-shaped cross section, comprising an arched A zone (11) disposed at the top, and B zones (12) disposed vertically on both sides of the A zone (11).

6. The lining structure of a fire door for a vehicle cross passage with extremely high ground stress according to claim 5, characterized in that: The A zone (11) and the B zone (12) are provided with a connection structure, the connection structure comprising: a first connection steel plate (13) provided on the end surface of the A zone (11), and a second connection steel plate (14) provided on the upper end surface of the B zone (12), the first connection steel plate (13) and the second connection steel plate (14) both having circular holes (15) at four corners, and second bolts (16) are provided in the circular holes (15) for fixing the first connection steel plate (13) and the second connection steel plate (14).

7. The lining structure of a fire door for a vehicle cross passage with extremely high ground stress according to claim 6, characterized in that: Grouting anchor rods (17) are provided on the top and the vertical surface of the supporting steel frame (3), grouting holes arranged in equal axes are provided on the side walls of the grouting anchor rods (17), and the grouting anchor rods (17) are provided with an upward elevation angle of 5-15°.

8. The lining structure of a fire door for a vehicle cross passage with extremely high ground stress according to claim 7, characterized in that: The initial support layer (1) also includes tunnel surrounding rock (18) outside the support steel frame (3), and a cushion block is provided between the tunnel surrounding rock (18) and the support steel frame (3).

9. The lining structure of a fire door for a vehicle cross passage with extremely high ground stress according to claim 5, characterized in that: A locking foot guide tube (19) is provided at the upper end of the B zone (12).

10. The lining structure of a fire door for a vehicle cross passage with extremely high ground stress according to claim 1, characterized in that: The composite waterproof layer (20) comprises a geotextile and a PVC waterproof board.

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