Mounting bracket and installation method of jet fan in long highway tunnel

Abstract

The present invention belongs to the technical field of tunnel traffic engineering, and relates to a jet fan mounting bracket and an installation method thereof for a long highway tunnel, wherein the mounting bracket comprises an arc-shaped column, a top crossbeam and a fan positioning clip; the arc-shaped column is arranged on the side wall of the secondary lining of the tunnel; the arc-shaped column comprises a first column and a second column opposite to the first column; the first column is connected to the second column through the top crossbeam; a jet fan accommodating chamber is formed between the top crossbeam and the secondary lining of the tunnel; the fan positioning clip is placed on the top crossbeam and fixes the jet fan on the top crossbeam. The present invention makes full use of the upper space of the tunnel construction limit, and provides a jet fan bracket and an installation method thereof with convenient construction and reliable performance for adding jet fans during the operation of long highway tunnels. Once the fan fails during operation, the bracket can provide a working platform, which has the advantages of convenient maintenance and flexible operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel traffic engineering, and relates to a mounting bracket and an installation method for a jet fan in a long highway tunnel, and in particular to a mounting bracket and an installation method for a jet fan which is suitable for being added to a long highway tunnel during operation. Background Art

[0002] At present, most tunnel operation ventilation adopts jet fan longitudinal ventilation method. Most jet fans are hung on the tunnel vault, and a few are hung on the side wall through embedded parts. The installation is difficult, the maintenance operation is complicated, and there is a risk of falling. The embedded parts are also very inconvenient during the construction of the secondary lining concrete of the tunnel.

[0003] The disclosed invention patent CN103883344 A provides a lateral tunnel fan installation device, which makes the installation of jet fans in tunnels safer, more convenient and more secure. However, the invention requires the tunnel section where the fan is installed to be appropriately enlarged, and then the ground-type fan foundation platform is made of steel sections, which is welded laterally with the steel plates embedded in the secondary lining concrete to ensure the stability of the fan during operation.

[0004] If the secondary lining section of the long and large highway tunnel that has been in operation is appropriately enlarged and then the jet fan described in the invention patent CN103883344A is installed laterally, there are the following problems: First, it is difficult to appropriately expand the secondary lining section, the cost is high, it is not economical, the operation is complicated, and the possibility of actually doing so is also very low. Second, after the section is appropriately enlarged, it is difficult to install the jet fan to ensure that no components can invade the tunnel construction limit as required by the regulations, and it is also difficult to ensure ventilation requirements to a certain extent, and the cable layout of the jet fan is not mentioned in the invention patent CN 103883344A. Summary of the invention

[0005] In order to solve the above technical problems existing in the background technology, the present invention provides a long and large highway tunnel jet fan installation bracket and installation method which can ensure driving safety, convenient construction and reliable performance.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A jet fan mounting bracket for a long highway tunnel, characterized in that: the jet fan mounting bracket for a long highway tunnel comprises an arc-shaped column, a top crossbeam and a fan positioning clip; the arc-shaped column is arranged on the side wall of the secondary lining of the tunnel; the arc-shaped column comprises a first column and a second column opposite to the first column; the first column is connected to the second column through the top crossbeam; a jet fan accommodating chamber is formed between the top crossbeam and the secondary lining of the tunnel; the fan positioning clip is placed on the top crossbeam and fixes the jet fan to the top crossbeam.

[0008] Preferably, the number of arc-shaped columns used in the present invention corresponds to the number of top cross beams; there are multiple arc-shaped columns and multiple top cross beams; multiple arc-shaped columns and multiple top cross beams form an overall frame structure, and the frame structure is arranged along the axial direction of the tunnel.

[0009] Preferably, the long and large highway tunnel jet fan mounting bracket adopted in the present invention also includes a top beam connecting steel belt arranged along the axial direction of the tunnel and used to connect multiple top beams; multiple top beams form an overall frame structure through the top beam connecting steel belt.

[0010] Preferably, the fan positioning clip adopted in the present invention is Ω-shaped as a whole; the fan positioning clip is made of steel belt; the width of the fan positioning clip is the same as the width of the top crossbeam; along the length direction of the fan positioning clip, fan positioning clip wing ears are respectively provided at both ends of the fan positioning clip; the fan positioning clip wing ears are provided with reserved bolt holes for the positioning clip wing ears; the reserved bolt holes for the positioning clip wing ears are provided with reserved bolts; after the fan positioning clip is clamped on the outside of the jet fan, it is fixedly connected to the top crossbeam through the reserved bolts.

[0011] Preferably, the first column and the second column used in the present invention both include H-shaped steel and a steel pad welded to the H-shaped steel; the cross-section of the overall structure after the H-shaped steel and the steel pad are welded is rectangular; the H-shaped steel of the first column is connected to the H-shaped steel of the second column through a top cross beam.

[0012] Preferably, the two ends of the top cross beam used in the present invention are respectively provided with connecting plates; the steel pad of the first column is connected to the top cross beam through the connecting plate; the top cross beam is connected to the steel pad of the second column through the connecting plate.

[0013] Preferably, the steel plate used in the present invention includes reserved bolt holes and reserved threading holes; reserved bolts are arranged on the reserved bolt holes of the steel plate; and the steel plate of the first column is fastened to the connecting plate by the reserved bolts.

[0014] Preferably, the top cross beam used in the present invention is an H-shaped steel which is the same as the first column or the second column; and a top cross beam reserved for threading wires is provided on the top cross beam.

[0015] Preferably, the long and large highway tunnel jet fan mounting bracket adopted by the present invention also includes an arc-shaped column positioning clip arranged on the outside of the first column and the second column and fixedly connected to the secondary lining of the tunnel; the arc-shaped column positioning clip is in a "J" shape, and column positioning clip wing ears are arranged at both ends of the arc-shaped column positioning clip along the length direction of the arc-shaped column positioning clip; the column positioning clip wing ears are provided with wing ear reserved bolt holes; the wing ear reserved bolt holes are provided with expansion bolts, and the arc-shaped column positioning clip is clamped on the outside of the first column and the second column and fixedly connected to the secondary lining of the tunnel through the expansion bolts.

[0016] A method for installing a jet fan mounting bracket for a long highway tunnel based on the above-mentioned method, characterized in that the method comprises the following steps:

[0017] 1) According to the inner contour of the secondary lining of the tunnel, arc-shaped columns are made, and the arc-shaped columns are fixed on the secondary lining of the tunnel through arc-shaped column positioning clips;

[0018] 2) Weld the top cross beam to the H-shaped steel of the curved column, and use the top cross beam connecting steel belt to connect the top cross beam arranged along the longitudinal direction of the tunnel;

[0019] 3) Use the Ω-shaped fan positioning clip to fix the jet fan on the top beam;

[0020] 4) The power line for supplying power to the jet fan is arranged upward from the cable trenches on both sides of the tunnel along the inner side of the flange of the H-shaped steel of the arc column, passes through the reserved wire threading holes on the steel plate and continues to be arranged upward to the top beam, and is laid along the flange of the top beam. After passing through the reserved wire threading holes on the top beam, the jet fan is directly powered to ensure its normal operation.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] The present invention provides a long highway tunnel jet fan mounting bracket and mounting method, the mounting bracket includes an arc column, a top crossbeam and a fan positioning clip; the arc column is arranged on the side wall of the tunnel secondary lining; the arc column includes a first column and a second column opposite to the first column; the first column is connected to the second column through the top crossbeam; a jet fan accommodating chamber is formed between the top crossbeam and the tunnel secondary lining; the fan positioning clip is placed on the top crossbeam and fixes the jet fan on the top crossbeam. The long highway tunnel jet fan mounting bracket and mounting method provided by the present invention, firstly, avoid the problem that the lateral tunnel fan erection device easily invades the tunnel construction limit, ensuring driving safety; secondly, avoid the problem of appropriately expanding the tunnel secondary lining section when the lateral tunnel fan is erected. The fan bracket thus arranged makes full use of the upper space of the tunnel construction limit, and provides a jet fan bracket and mounting method thereof with convenient construction and reliable performance for adding jet fans to long tunnels during operation. If the fan fails during operation, the bracket can provide an operating platform, which has the advantages of convenient maintenance and flexible operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view structural schematic diagram of the jet fan bracket provided by the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the arc-shaped column used in the present invention;

[0025] Figure 3 It is a structural schematic diagram of the arc column positioning clip adopted by the present invention;

[0026] Figure 4 It is a structural schematic diagram of the fan positioning clip adopted by the present invention;

[0027] Figure 5 yes Figure 1 AA cross-sectional structural diagram;

[0028] Figure 6 It is a schematic diagram of the top three-dimensional structure of the jet fan bracket provided by the present invention;

[0029] in:

[0030] 1-H-shaped steel; 2-steel pad; 21-reserved bolt hole of steel pad; 22-reserved threading hole of steel pad; 3-arc-shaped column positioning clip; 31-column positioning clip wing ear; 32-reserved bolt hole of wing ear; 4-top cross beam; 41-reserved threading hole of top cross beam; 5-top cross beam connecting steel belt; 6-fan positioning clip; 61-fan positioning clip wing ear; 62-reserved bolt hole of positioning clip wing ear; 7-jet fan; 8-tunnel construction limit; 9-secondary lining. DETAILED DESCRIPTION

[0031] The present invention provides a jet fan mounting bracket for a long highway tunnel, which comprises an arc-shaped column, a top crossbeam 4 and a fan positioning clip 6; the arc-shaped column is arranged on the side wall of the tunnel secondary lining 9; the arc-shaped column comprises a first column and a second column opposite to the first column; the first column is connected to the second column through the top crossbeam 4; a jet fan 7 accommodating cavity is formed between the top crossbeam 4 and the tunnel secondary lining 9; the fan positioning clip 6 is placed on the top crossbeam 4 and fixes the jet fan 7 on the top crossbeam 4.

[0032] The number of the arc columns corresponds to the number of the top cross beams 4; there are multiple arc columns and multiple top cross beams 4; multiple arc columns and multiple top cross beams 4 form an integral frame structure, and the frame structure is arranged along the axial direction of the tunnel. The long highway tunnel jet fan mounting bracket also includes a top cross beam connecting steel belt 5 arranged along the axial direction of the tunnel and used to connect the multiple top cross beams 4; multiple top cross beams 4 form an integral frame structure through the top cross beam connecting steel belt 5. The fan positioning clip 6 is Ω-shaped as a whole; the fan positioning clip 6 is made of steel belt; the width of the fan positioning clip 6 is the same as the width of the top crossbeam 4; along the length direction of the fan positioning clip 6, fan positioning clip wing ears 61 are respectively provided at both ends of the fan positioning clip 6; the fan positioning clip wing ears 61 are provided with positioning clip wing ear reserved bolt holes 62; the positioning clip wing ear reserved bolt holes 62 are provided with reserved bolts; after the fan positioning clip 6 is clamped on the outside of the jet fan 7, it is fixedly connected to the top crossbeam 4 through the reserved bolts.

[0033] The first column and the second column both include an H-shaped steel 1 and a steel pad 2 welded to the H-shaped steel 1; the cross section of the overall structure after the H-shaped steel 1 and the steel pad 2 are welded is rectangular; the H-shaped steel 1 of the first column is connected to the H-shaped steel 1 of the second column through a top crossbeam 4. Connecting plates are provided at both ends of the top crossbeam 4; the steel pad 2 of the first column is connected to the top crossbeam 4 through a connecting plate; the top crossbeam 4 is connected to the steel pad 2 of the second column through a connecting plate. The steel pad 2 includes a steel pad reserved bolt hole 21 and a steel pad reserved threading hole 22; a reserved bolt is provided on the steel pad reserved bolt hole 21; the steel pad 2 of the first column is fastened to the connecting plate through the reserved bolt. The top crossbeam 4 is the same H-shaped steel as the first column or the second column; the top crossbeam 4 is provided with a top crossbeam reserved threading hole 41.

[0034] The jet fan mounting bracket for a long highway tunnel also includes an arc-shaped column positioning clip 3 which is arranged outside the first column and the second column and fixedly connected to the secondary lining 9 of the tunnel; the arc-shaped column positioning clip 3 is in a "F" shape, and column positioning clip wing ears 31 are arranged at both ends of the arc-shaped column positioning clip 3 along the length direction of the arc-shaped column positioning clip 3; the column positioning clip wing ears 31 are provided with wing ear reserved bolt holes 32; the wing ear reserved bolt holes 32 are provided with expansion bolts, and the arc-shaped column positioning clip 3 is clamped on the outside of the first column and the second column and fixedly connected to the secondary lining 9 of the tunnel through the expansion bolts.

[0035] A method for installing a jet fan mounting bracket for a long highway tunnel based on the above-mentioned method comprises the following steps:

[0036] 1) According to the inner contour of the tunnel secondary lining 9, an arc-shaped column is made, and the arc-shaped column is fixed on the tunnel secondary lining 9 by the arc-shaped column positioning clip 3;

[0037] 2) welding the top cross beam 4 to the H-shaped steel 1 of the arc column, and connecting the top cross beam 4 arranged along the longitudinal direction of the tunnel using the top cross beam connecting steel belt 5;

[0038] 3) Use the Ω-shaped fan positioning clip 6 to fix the jet fan 7 on the top crossbeam 4;

[0039] 4) The power line for supplying power to the jet fan 7 is arranged upward from the cable trenches on both sides of the tunnel along the inner side of the flange of the H-shaped steel 1 of the arc column, passes through the reserved wire threading hole 22 on the steel plate 2, and then continues to be arranged upward to the top crossbeam 4, and is laid along the flange of the top crossbeam 4. After passing through the reserved wire threading hole 41 of the top crossbeam 4, the jet fan 7 is directly powered to ensure its normal operation.

[0040] The technical solution provided by the present invention will be described in detail below with reference to the accompanying drawings:

[0041] See also Figure 1 to Figure 6The present invention provides a long highway tunnel jet fan mounting bracket, which is mainly composed of five parts: arc-shaped columns on both sides, arc-shaped column positioning clips 3, top crossbeams 4, top crossbeam connecting steel belts 5 and fan positioning clips 6. The arc-shaped columns on both sides are formed by bending H-shaped steel 1. The number of H-shaped steels 1 used is determined according to the inner contour line of the lining of two lanes, three lanes or four lanes. The overall bending shape after assembling several H-shaped steels 1 is the same as the secondary lining shape of the tunnel. Steel pads 2 are provided at both ends of the H-shaped steel 1. The length and width of the steel pads 2 are the same as the web height and flange width of the H-shaped steel 1, and saddle welding is adopted to ensure that the weld is full and no sand holes are left, so as to ensure that the steel pads 2 are reliably connected to the H-shaped steel 1. The steel pads 2 at the ends of the H-shaped steel 1 are connected by bolts and then assembled into arc-shaped columns.

[0042] The arc column positioning clip 3 is in the shape of a "F" and is made of a steel material with a thickness of 5mm. The inner groove width of the arc column positioning clip 3 is the same as the flange width of the H-shaped steel 1. Two bolt holes are reserved on both side ears of the arc column positioning clip 3, and are fixed to the secondary lining structure of the side wall through expansion bolts. The arc column positioning clip 3 is set at a certain distance along the H-shaped steel 1 bent into a specific shape, especially at the connection of the H-shaped steel 1. Its functions are to fix the arc column and to be aesthetically pleasing, ensuring that the bolts at the joint of the H-shaped steel are not visible.

[0043] The top crossbeam 4 is made of the same type of H-shaped steel, and certain measures are taken to ensure that the top crossbeam 4 is firmly connected to the arc-shaped columns on both sides. Three arc-shaped columns and the top crossbeam 4 are set in the longitudinal direction of the tunnel, and the top crossbeam 4 is connected in the longitudinal direction of the tunnel with connecting steel sheets to fix the crossbeam, ensuring that the jet fan is stable when working and the top crossbeam does not shake.

[0044] After the jet fan is in place, the fan positioning clip 6 is used to fix the fan on the top crossbeam 4. The fan positioning clip 6 is Ω-shaped and made of a steel strip with a certain thickness. The width is the same as the flange width of the top crossbeam 4. The two ends of the fan positioning clip 6 have wing ears of a certain length. Bolt holes are set on the wing ears to match the reserved bolt holes of the top crossbeam 4, and the fan is fixed by bolts. The fan positioning clip 6 is set on the three crossbeams set along the longitudinal direction of the tunnel, so that the fan can be firmly fixed on the top crossbeam. Two threading holes are set on the top crossbeam to provide power for the normal operation of the fan. The power line can be arranged upward from the cable trench on both sides of the tunnel along the inner side of the flange of the arc column. When encountering the connecting end plate of the H-shaped steel, it can be passed through the reserved wire hole on the connecting end plate, and then continue to be arranged upward to the top crossbeam, and laid along the flange of the top crossbeam. After passing through the reserved threading holes of the top crossbeam, the fan is directly powered to ensure its normal operation.

[0045] The above implementation is only a preferred embodiment of the present invention and is not intended to limit the implementation and scope of rights of the present invention. All equivalent changes and approximate substitutions made according to the content of the patent protection scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A long highway tunnel jet fan mounting bracket, the long highway tunnel jet fan mounting bracket comprising an arc-shaped column, a top crossbeam (4) and a fan positioning clip (6); characterized in that: The arc-shaped columns are arranged on the side walls of the tunnel secondary lining (9); the arc-shaped columns include a first column and a second column opposite to the first column; the first column is connected to the second column via a top crossbeam (4); a jet fan (7) accommodating chamber is formed between the top crossbeam (4) and the tunnel secondary lining (9); the fan positioning clip (6) is placed on the top crossbeam (4) and fixes the jet fan (7) to the top crossbeam (4); The number of the arc-shaped columns corresponds to the number of the top cross beams (4); the arc-shaped columns and the top cross beams (4) are both multiple; the multiple arc-shaped columns and the multiple top cross beams (4) form an integral frame structure, and the frame structure is arranged along the axial direction of the tunnel; the long highway tunnel jet fan installation bracket also includes a top cross beam connecting steel belt (5) arranged along the axial direction of the tunnel and used to connect the multiple top cross beams (4); the multiple top cross beams (4) form an integral frame structure through the top cross beam connecting steel belt (5); The fan positioning clip (6) is Ω-shaped as a whole. The fan positioning clip (6) is wound with a steel belt. The width of the fan positioning clip (6) is the same as the width of the top crossbeam (4). Along the length direction of the fan positioning clip (6), the fan positioning clip wing ears (61) are respectively provided at both ends of the fan positioning clip (6). The fan positioning clip wing ears (61) are provided with positioning clip wing ear reserved bolt holes (62); the positioning clip wing ear reserved bolt holes (62) are provided with reserved bolts; after the fan positioning clip (6) is clamped on the outside of the jet fan (7), it is fixedly connected to the top crossbeam (4) through the reserved bolts; The first column and the second column both comprise an H-shaped steel (1) and a steel pad (2) welded to the H-shaped steel (1); the length and width of the steel pad (2) are respectively the same as the web height and flange width of the H-shaped steel (1), and are saddle welded; the long highway tunnel jet fan mounting bracket achieves the technical effect of avoiding intrusion into the tunnel construction limit and ensuring driving safety, and also achieves the technical effect of avoiding expansion of the tunnel secondary lining section.

2. The long highway tunnel jet fan mounting bracket according to claim 1 is characterized in that: The cross section of the overall structure after the H-shaped steel (1) and the steel pad (2) are welded is rectangular; the H-shaped steel (1) of the first column is connected to the H-shaped steel (1) of the second column via a top crossbeam (4).

3. The long highway tunnel jet fan mounting bracket according to claim 2 is characterized in that: The two ends of the top cross beam (4) are respectively provided with connecting plates; the steel pad (2) of the first column is connected to the top cross beam (4) via the connecting plates; the top cross beam (4) is connected to the steel pad (2) of the second column via the connecting plates; the steel pad (2) comprises a steel pad reserved bolt hole (21) and a steel pad reserved threading hole (22); a reserved bolt is provided on the steel pad reserved bolt hole (21); the steel pad (2) of the first column is fastened to the connecting plate via the reserved bolt; the top cross beam (4) is provided with a top cross beam reserved threading hole (41).

4. The long highway tunnel jet fan mounting bracket according to claim 3 is characterized in that: The invention also comprises an arc-shaped column positioning clip (3) which is arranged outside the first column and the second column and fixedly connected to the tunnel secondary lining (9); the arc-shaped column positioning clip (3) is in a "J" shape, and column positioning clip wing ears (31) are arranged at both ends of the arc-shaped column positioning clip (3) along the length direction of the arc-shaped column positioning clip (3); the column positioning clip wing ears (31) are provided with wing ear reserved bolt holes (32); the wing ear reserved bolt holes (32) are provided with expansion bolts, and the arc-shaped column positioning clip (3) is fixedly connected to the tunnel secondary lining (9) through the expansion bolts after being clamped outside the first column and the second column.

5. The long highway tunnel jet fan mounting bracket according to claim 4 is characterized in that: The top cross beam (4) is an H-shaped steel which is the same as the first column or the second column.

6. A method for installing a jet fan mounting bracket for a long highway tunnel as claimed in claim 5, characterized in that: The following steps are involved: 1) According to the inner contour of the tunnel secondary lining (9), an arc-shaped column is manufactured, and the arc-shaped column is fixed to the tunnel secondary lining (9) by means of an arc-shaped column positioning clip (3); 2) welding the top cross beam (4) to the H-shaped steel (1) of the arc column, and connecting the top cross beam (4) arranged along the longitudinal direction of the tunnel using a top cross beam connecting steel belt (5); 3) Using an Ω-shaped fan positioning clip (6) to fix the jet fan (7) on the top crossbeam (4); 4) The power line for supplying power to the jet fan (7) is arranged upward from the cable trenches on both sides of the tunnel along the inner side of the flange of the H-shaped steel (1) of the arc column, passes through the reserved wire threading hole (22) on the steel plate (2), and then continues to be arranged upward to the top cross beam (4), and is arranged along the flange of the top cross beam (4), and passes through the reserved wire threading hole (41) reserved on the top cross beam (4), and then directly supplies power to the jet fan (7) to ensure its normal operation.

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