Temporary support positioning device for cold region highway tunnel

Abstract

A kind of cold region highway tunnel temporary support positioning device belongs to tunnel construction equipment technical field.Multiple anchor holes are evenly distributed in the periphery of base, lower end is fixedly connected with rubber pad one, the recess is set in rubber pad one and built-in anti-frost heave pad, it is equipped with anchor hole two corresponding with anchor hole one on it, upper end of base is fixedly connected with support plate, support plate is fixedly connected with warm shell, hydraulic cylinder in shell is detachably connected with support plate, pressure maintaining valve is arranged in liquid inlet, reinforcing mechanism is sleeved on the outer wall of warm shell and is fixedly connected with support plate, upper end is communicated with organ type protective cover, protective cover other end is fixedly connected with top seat, the telescopic end of hydraulic cylinder is located in cover and is fixedly connected with top seat, multiple support frames are fixedly connected on both sides of top seat, support frame is connected with arc-shaped plate one, arc-shaped plate one upper end is evenly distributed with support mechanism.The utility model is optimized according to the demand of cold region, solves the influence of low temperature frost heaving, realizes accurate positioning and reliable support, improves construction safety and efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of tunnel construction equipment, specifically a temporary support positioning device for highway tunnels in cold regions. Background Technology

[0002] In highway tunnel construction in cold regions, temporary support is a crucial measure to ensure the stability of the surrounding rock and prevent collapse. Its positioning accuracy directly affects construction safety and the quality of subsequent permanent support. The cold environment, characterized by low temperatures, frozen soil heave, snow cover, and freeze-thaw cycles, places stringent demands on the adaptability of temporary support devices.

[0003] Existing temporary support devices for tunnels in cold regions have weak resistance to ground frost heave, poor low-temperature protection and insulation, and core components are prone to freezing blockage and cracking due to low temperatures. The structure lacks resistance to low-temperature brittleness and is prone to deformation in low-temperature environments. It is also difficult to adapt to the complex curved contours of the tunnel top, resulting in insufficient accuracy in support positioning. Utility Model Content

[0004] To address the problems existing in the background technology, this utility model provides a temporary support positioning device for highway tunnels in cold regions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a temporary support and positioning device for highway tunnels in cold regions, comprising a base, a rubber pad, an anti-freeze pad, a support plate, a heat insulation shell, a hydraulic cylinder, a pressure holding valve, a bellows-type protective cover, a top seat, an arc-shaped plate, a reinforcement mechanism, multiple support frames, and multiple support mechanisms.

[0006] The base is provided with multiple anchor holes 1 evenly distributed around its circumference. The lower end of the base is fixedly connected to a rubber pad 1. A groove is provided at the lower end of the rubber pad, and an anti-freezing and swelling pad is fixed in the groove. Multiple anchor holes 2 are provided on the rubber pad 1 and are arranged corresponding to multiple anchor holes 1. The upper end of the base is fixedly connected to a support plate. The support plate is fixedly connected to the lower end of the insulation shell. A hydraulic cylinder is provided inside the insulation shell. The hydraulic cylinder is detachably connected to the support plate. A pressure-holding valve is provided at the inlet of the hydraulic cylinder. A reinforcing mechanism is fitted on the outer wall of the insulation shell. The reinforcing mechanism is fixedly connected to the support plate. The upper end of the insulation shell is connected and fixedly connected to one end of a bellows-style protective cover. The other end of the bellows-style protective cover is fixedly connected to a top seat. The telescopic end of the hydraulic cylinder is located inside the bellows-style protective cover and is fixedly connected to the top seat. Multiple support frames are fixed on both sides of the top seat. Each support frame is fixedly connected to an arc-shaped plate 1. Multiple support mechanisms are evenly distributed on the upper end of the arc-shaped plate 1.

[0007] The outer wall of the insulating shell is equipped with a sealed door.

[0008] The reinforcement mechanism includes a reinforcing ring and multiple reinforcing ribs;

[0009] The reinforcing ring is fixed to the outer wall of the insulation shell. Multiple reinforcing ribs are evenly distributed along the circumference of the outer wall of the reinforcing ring, and the multiple reinforcing ribs are fixedly connected to the support plate.

[0010] The outer wall of the bellows-style protective cover is made of EPDM cold-resistant rubber, the middle layer of the bellows-style protective cover is made of high-strength nylon cloth, and the inner wall of the bellows-style protective cover is coated with low-temperature lubricating grease.

[0011] Each of the aforementioned support mechanisms includes a slide rod 1, a limiting plate, an arc-shaped plate 2, a rubber pad 2, a spring, a slide rod 2, and a heat-insulating corrugated sleeve;

[0012] The arc-shaped plate 1 has a sliding hole 1 corresponding to the sliding rod 1 and two sliding holes 2 corresponding to the two sliding rods 2. The sliding hole 1 is located between the two sliding holes 2. The sliding rod 1 is slidably connected to the sliding hole 1. The lower end of the sliding rod is fixedly connected to the limiting plate. The limiting plate is located below the arc-shaped plate 1. The upper end of the sliding rod 1 is fixedly connected to the arc-shaped plate 2. The upper end of the arc-shaped plate 2 is provided with a rubber pad 2. The lower end of the arc-shaped plate 2 is fixedly connected to the two sliding rods 2. Each sliding rod 2 is slidably connected to the corresponding sliding hole 2. The spring is fitted on the sliding rod 1. One end of the spring is fixedly connected to the arc-shaped plate 1, and the other end of the spring is fixedly connected to the arc-shaped plate 2. The spring is covered with a thermal corrugated sleeve. One end of the thermal corrugated sleeve is fixedly connected to the arc-shaped plate 1, and the other end of the thermal corrugated sleeve is fixedly connected to the arc-shaped plate 2.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Effectively resists the effects of frost heave in cold regions and improves the stability of the device. Through the cooperation of the rubber pad under the base and the anti-frost heave pad, the damage of frost heave force to the device's fixing structure can be buffered, ensuring that the device is firmly fixed in complex ground environments in cold regions.

[0015] 2. It has excellent low-temperature protection and insulation performance. Through the synergistic effect of the insulating shell, sealing door and bellows-style protective cover, it can effectively isolate the low temperature in cold regions and prevent core components such as hydraulic cylinders from freezing and cracking due to low temperature, thus ensuring that the components work normally in cold environments.

[0016] 3. To enhance the structural strength and resistance to low-temperature brittleness of the device, the reinforcing ring on the outer wall of the insulation shell, together with the reinforcing ribs evenly distributed along the circumference, can improve the structural stability of the insulation shell and the overall device, and prevent the device from deforming due to brittleness in low-temperature environments.

[0017] 4. To achieve adaptive and precise support for the tunnel roof, the spring and slide rod assembly in the support mechanism work together to enable the second arc plate to adapt to the curve contour of the tunnel roof with different curvatures, ensuring that the second rubber pad fits tightly against the tunnel roof wall and improving the accuracy of support positioning.

[0018] 5. Installation and maintenance are convenient and efficient. The hydraulic cylinder and support plate are detachably connected, and the insulation shell is equipped with a sealed door, which facilitates the connection and disassembly of the hydraulic pump station and the inspection and maintenance of components such as the hydraulic cylinder, reducing the difficulty of operation.

[0019] 6. Ensure stable and continuous support force. The hydraulic pressure in the hydraulic cylinder can be kept stable through the pressure holding valve. Even after the hydraulic pump station is removed, the device can still generate a stable support force, ensuring the reliability of temporary support.

[0020] In summary, this utility model addresses the special needs of temporary support for highway tunnels in cold regions by optimizing the design in terms of stability, low-temperature protection, structural strength, support accuracy, and ease of operation. It effectively solves the adverse effects of low temperatures and frost heave on the positioning device for temporary tunnel support, enabling precise positioning and reliable support for temporary support in highway tunnels in cold regions, and improving the safety and efficiency of temporary support during tunnel construction in cold regions. Attached Figure Description

[0021] Figure 1 This is a front view of the present invention;

[0022] Figure 2 This is the left view of this utility model;

[0023] Figure 3 This is a schematic diagram of the support mechanism structure of this utility model. Detailed Implementation

[0024] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0025] This embodiment describes a temporary support positioning device for highway tunnels in cold regions, including a base 1, a rubber pad 2, an anti-freezing pad 3, a support plate 4, a heat insulation shell 5, a hydraulic cylinder 6, a pressure holding valve 7, a bellows-type protective cover 10, a top seat 11, an arc plate 13, a reinforcement mechanism, multiple support frames 12, and multiple support mechanisms.

[0026] The base 1 has multiple anchor holes evenly distributed around its circumference. The lower end of the base 1 is fixedly connected to a rubber pad 2. The lower end of the rubber pad 2 has a groove, in which an anti-freezing pad 3 is fixed. The rubber pad 2 has multiple anchor holes corresponding to the anchor holes. The upper end of the base 1 is fixedly connected to a support plate 4. The support plate 4 is fixedly connected to the lower end of a thermal insulation shell 5. A hydraulic cylinder 6 is installed inside the thermal insulation shell 5. The hydraulic cylinder 6 is detachably connected to the support plate 4. The inlet of the hydraulic cylinder 6 is equipped with a pressure-holding valve 7. The outer wall of the heating shell 5 is fitted with a reinforcing mechanism, which is fixedly connected to the support plate 4. The upper end of the heating shell 5 is connected and fixed to one end of the bellows-type protective cover 10. The other end of the bellows-type protective cover 10 is fixedly connected to the top seat 11. The telescopic end of the hydraulic cylinder 6 is located inside the bellows-type protective cover 10 and is fixedly connected to the top seat 11. Multiple support frames 12 are fixed on both sides of the top seat 11. Each support frame 12 is fixedly connected to the arc plate 13. Multiple support mechanisms are evenly distributed on the upper end of the arc plate 13.

[0027] The outer wall of the insulating shell 5 is provided with a sealing door 21.

[0028] The reinforcement mechanism includes a reinforcing ring 8 and multiple reinforcing ribs 9;

[0029] The reinforcing ring 8 is fixedly mounted on the outer wall of the insulating shell 5. Multiple reinforcing ribs 9 are evenly distributed along the circumference of the outer wall of the reinforcing ring 8, and the multiple reinforcing ribs 9 are all fixedly connected to the support plate 4.

[0030] The outer wall of the accordion-style protective cover 10 is made of EPDM cold-resistant rubber, the middle layer of the accordion-style protective cover 10 is made of high-strength nylon cloth, and the inner wall of the accordion-style protective cover 10 is coated with low-temperature lubricating grease.

[0031] Each of the aforementioned support mechanisms includes a slide bar 14, a limiting plate 15, an arc plate 2 16, a rubber pad 2 17, a spring 18, a slide bar 2 19, and a heat-insulating corrugated sleeve 20;

[0032] The arc-shaped plate 13 is provided with a sliding hole 1 corresponding to the sliding rod 14 and two sliding holes 2 corresponding to the two sliding rods 19. The sliding hole 1 is located between the two sliding holes 2. The sliding rod 14 is slidably connected to the sliding hole 1. The lower end of the sliding rod 14 is fixedly connected to the limiting plate 15. The limiting plate 15 is located below the arc-shaped plate 13. The upper end of the sliding rod 14 is fixedly connected to the arc-shaped plate 16. The upper end of the arc-shaped plate 16 is provided with a rubber pad 2 17. The lower end of the arc-shaped plate 16... Two slide rods 19 are fixedly connected, and each slide rod 19 is slidably connected to a corresponding slide hole 14. A spring 18 is fitted on a slide rod 14. One end of the spring 18 is fixedly connected to an arc plate 13, and the other end of the spring 18 is fixedly connected to an arc plate 16. A heat-insulating corrugated sleeve 20 is provided on the outer sleeve of the spring 18. One end of the heat-insulating corrugated sleeve 20 is fixedly connected to an arc plate 13, and the other end of the heat-insulating corrugated sleeve 20 is fixedly connected to an arc plate 16.

[0033] When using this utility model, first move the device to the required support position inside the tunnel and place it on the flat and compacted ground. Then, use anchors (optional M20×200, strength grade 8.8 chemical anchors) to pass through multiple anchor holes 1 evenly distributed around the circumference of the base 1 and corresponding anchor holes 2 on the rubber pad 2 to firmly fix the device to the ground. The anti-freezing heave pad 3 (optional XPS-38 XPS extruded board (density 38kg / m³, compressive strength ≥250kPa, low temperature resistance -50℃)) fixed in the groove at the lower end of the rubber pad 2 effectively buffers and resists the damage to the device's stability caused by the frost heave force of the ground in cold regions. Then, open the sealing door 21 (optional PU-100, with a low temperature resistance -40℃ polyurethane sealing strip) on the outer wall of the insulating shell 5 to expose the hydraulic cylinder 6 (optional model) detachably connected to the support plate 4 inside the insulating shell 5 by bolts. HSG01-100 (rated working pressure 25MPa, low temperature resistance -40℃) connects to an external portable hydraulic pump station (a portable hydraulic pump station with a liquid source, such as the DBS series, can be selected) to the inlet of hydraulic cylinder 6. The pump station supplies hydraulic oil (low temperature anti-wear hydraulic oil of model L-HV46, applicable temperature -30℃-100℃) to hydraulic cylinder 6, causing the telescopic end of hydraulic cylinder 6 to rise along the inside of the bellows-type protective cover 10 (the outer wall of the bellows-type protective cover 10 can be made of 3072EM type non-oil-filled toughened EPDM cold-resistant rubber, Shore hardness 70A, low temperature resistance -50℃, the middle layer can be made of nylon 66 high-strength nylon cloth (breaking strength ≥2000N / 5cm), and the inner wall is coated with low temperature grease of model MobilSHC629 (applicable temperature -40℃-150℃), which can effectively isolate the low temperature in cold regions and prevent the telescopic end of hydraulic cylinder 6 from freezing and blocking due to low temperature, thus affecting its operation).

[0034] The extension end of hydraulic cylinder 6 pushes top seat 11 to rise synchronously. Multiple support frames 12 (optional material Q355B) fixed on both sides of top seat 11 drive arc plate one 13 (optional material Q235B) to rise synchronously. Among the multiple support mechanisms evenly distributed on the upper end of arc plate one 13, the rubber pad two 17 (optional material NBR-70 nitrile rubber, Shore hardness 70A, low temperature resistance -30℃) set on the upper end of arc plate two 16 (optional material Q235B) first contacts the tunnel top wall. As hydraulic cylinder 6 continues to apply pressure, arc plate two 16, through slide rod one 14 (optional material 45 steel) and two slide rods two 19, (Optional material: 45# steel) Slide along the sliding holes 1 and 2 on the arc plate 13 respectively, while compressing the spring 18 fitted on the slide rod 14 (the spring 18 can be made of chromium vanadium spring steel (50CrVA) or silicon manganese spring steel (60Si2MnA), with a working temperature range of -40℃ to 120℃). The heat-insulating corrugated sleeve 20 (optional neoprene rubber material, resistant to low temperature -40℃) is installed on the outside of it, which can prevent the spring 18 from failing due to low temperature in cold regions. At the same time, by utilizing the elastic deformation characteristics of the spring 18, the arc plate 16 can adapt to the curve contour of different curvatures at the top of the tunnel to achieve a tight fit.

[0035] After all the rubber pads 17 of the support mechanisms are fully in contact with the tunnel top wall, close the pressure holding valve 7 of the hydraulic cylinder 6 inlet to maintain stable hydraulic pressure in the hydraulic cylinder 6. Then, remove the external portable hydraulic pump station and close the sealing door 21 to form a sealed and heat-insulating space in the insulation shell 5, preventing the hydraulic cylinder 6 from freezing and cracking due to low temperatures in cold regions. The telescopic end of the hydraulic cylinder 6 is protected from freezing and blockage by the bellows-type protective cover 10. The reinforcing ring 8 and multiple reinforcing ribs 9 evenly distributed along the circumference of the outer wall of the insulation shell 5 are fixedly connected to the support plate 4, which can enhance the structural strength of the insulation shell 5 in low-temperature environments in cold regions and prevent the device from deforming due to low-temperature brittleness. Finally, the precise positioning and reliable support of the temporary support for highway tunnels in cold regions are achieved.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A temporary support positioning device for highway tunnels in cold regions, characterized in that: Includes a base (1), a rubber pad (2), an anti-freeze pad (3), a support plate (4), a heat insulation shell (5), a hydraulic cylinder (6), a pressure holding valve (7), a bellows-style protective cover (10), a top seat (11), an arc plate (13), a reinforcement mechanism, multiple support frames (12), and multiple support mechanisms; The base (1) is provided with a plurality of anchor holes 1 evenly distributed around its circumference. The lower end of the base (1) is fixedly connected to a rubber pad 1 (2). The lower end of the rubber pad 1 (2) is provided with a groove, and an anti-freezing pad plate (3) is fixed in the groove. The rubber pad 1 (2) is provided with a plurality of anchor holes 2 and is provided corresponding to the plurality of anchor holes 1. The upper end of the base (1) is fixedly connected to a support plate (4). The support plate (4) is fixedly connected to the lower end of the insulating shell (5). The insulating shell (5) is provided with a hydraulic cylinder (6). The hydraulic cylinder (6) is detachably connected to the support plate (4). The inlet of the hydraulic cylinder (6) is provided with a pressure holding valve (7). The outer wall of the heat insulation shell (5) is fitted with a reinforcement mechanism, which is fixedly connected to the support plate (4). The upper end of the heat insulation shell (5) is connected to one end of the bellows-type protective cover (10), and the other end of the bellows-type protective cover (10) is fixedly connected to the top seat (11). The telescopic end of the hydraulic cylinder (6) is located inside the bellows-type protective cover (10) and is fixedly connected to the top seat (11). Multiple support frames (12) are fixed on both sides of the top seat (11). Each support frame (12) is fixedly connected to the first arc plate (13). Multiple support mechanisms are evenly distributed on the upper end of the first arc plate (13).

2. The temporary support positioning device for highway tunnels in cold regions according to claim 1, characterized in that: The outer wall of the insulating shell (5) is provided with a sealing door (21).

3. The temporary support positioning device for highway tunnels in cold regions according to claim 1, characterized in that: The reinforcement mechanism includes a reinforcement ring (8) and multiple reinforcing ribs (9); The reinforcing ring (8) is fixed on the outer wall of the heat insulation shell (5). Multiple reinforcing ribs (9) are evenly distributed along the circumference of the outer wall of the reinforcing ring (8). The multiple reinforcing ribs (9) are all fixedly connected to the support plate (4).

4. The temporary support positioning device for highway tunnels in cold regions according to claim 1, characterized in that: The outer wall of the bellows-style protective cover (10) is made of EPDM cold-resistant rubber, the middle layer of the bellows-style protective cover (10) is made of high-strength nylon cloth, and the inner wall of the bellows-style protective cover (10) is coated with low-temperature lubricating grease.

5. The temporary support positioning device for highway tunnels in cold regions according to claim 1, characterized in that: Each of the support mechanisms includes a slide bar (14), a limiting plate (15), an arc plate (16), a rubber pad (17), a spring (18), a slide bar (19), and a heat-insulating corrugated sleeve (20). The arc-shaped plate (13) is provided with a sliding hole 1 corresponding to the sliding rod 1 (14) and two sliding holes 2 corresponding to the two sliding rods 2 (19). The sliding hole 1 is located between the two sliding holes 2. The sliding rod 1 (14) is slidably connected to the sliding hole 1. The lower end of the sliding rod 1 (14) is fixedly connected to the limiting plate (15). The limiting plate (15) is located below the arc-shaped plate (13). The upper end of the sliding rod 1 (14) is fixedly connected to the arc-shaped plate 2 (16). The upper end of the arc-shaped plate 2 (16) is provided with a rubber pad 2 (17). The lower end of the arc-shaped plate 2 (16) is connected to the... Two sliding rods (19) are fixedly connected, and each sliding rod (19) is slidably connected to the corresponding sliding hole (2). The spring (18) is fitted on the sliding rod (14). One end of the spring (18) is fixedly connected to the arc plate (13), and the other end of the spring (18) is fixedly connected to the arc plate (16). The spring (18) is covered with a heat-insulating corrugated sleeve (20). One end of the heat-insulating corrugated sleeve (20) is fixedly connected to the arc plate (13), and the other end of the heat-insulating corrugated sleeve (20) is fixedly connected to the arc plate (16).

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