Self-regulating energy-absorbing anti-bumping hydraulic support for roadway and use method thereof

Abstract

This invention relates to the field of coal mine safety support technology, specifically to a self-regulating energy-absorbing and anti-impact hydraulic support for roadways, comprising a unit support and a bridge-type energy-absorbing top beam. The unit support has a top beam on top, with multiple rectangular positioning bosses at its upper end. Multiple sets of limiting grooves are formed at the lower ends of the bridge-type energy-absorbing top beam. Locking devices are provided on the front and rear sides of the unit support top beam. Multiple rectangular grooves are formed on the top of the bridge-type energy-absorbing top beam, each containing an energy-absorbing component. Multiple adjacent energy-absorbing components, combined with a top beam bearing plate, form a group of energy-absorbing areas. The bridge-type energy-absorbing top beam has multiple energy-absorbing areas to autonomously regulate the top pressure. Beneficial effects include: solving the problem of uneven stress on the support top beam, achieving multi-point, multi-support protection; easy disassembly and transportation, and free assembly and combination; and adjustable width of the two unit supports in the roadway width direction, providing greater adaptability to different roadway widths.

Description

Technical Field

[0001] This invention relates to the field of roadway anti-scour support technology, specifically to a self-regulating energy-absorbing anti-scour hydraulic support for roadways and its application method. Background Technology

[0002] Rockburst is one of the typical dynamic disasters affecting mine safety. Over the years, large-scale coal mining has significantly reduced the reserves of shallow coal seams, necessitating continued mining into deeper areas to meet demand. However, with increasing mining depth, the characteristics of coal seam stress, surrounding rock stress, coal body stress level, and the geological environment become increasingly complex. The hydraulic supports used in fully mechanized mining faces are high-strength and high-density, providing strong resistance to rockbursts. Roadways, as key passageways in underground mining, are important underground structures for transportation, drainage, and ventilation. Due to their specific requirements, the support strength and density of hydraulic supports within roadways cannot match those at the working face.

[0003] In my country, roadway rockbursts account for about 90% of all rockbursts in coal mines. As the roadway excavation time increases, the elastic zone of the overlying strata gradually transforms into the plastic zone, and the plastic zone gradually transforms into the fractured zone. Therefore, in order to ensure the safe and effective progress of mining operations, the support of the roadway and the resistance to rockbursts are extremely important.

[0004] Currently, the mainstream hydraulic support types used for roadway support include stack-type hydraulic supports, single-unit hydraulic supports, unit-type hydraulic supports, self-moving hydraulic supports, and gantry-type hydraulic supports. Each type of support has its own characteristics, but all are somewhat inadequate in preventing rockbursts. Rockbursts in roadways are an energy conversion process. When this energy reaches the surrounding rock, it needs to be absorbed by the support system. Hydraulic supports, as a crucial part of the support system, can ensure the required support stress, but they cannot meet the energy absorption requirements. Although hydraulic supports are equipped with safety valves, the rockburst event occurs in a very short time, typically less than 50ms, while the safety valve opening time is longer than this. Therefore, before the safety valve opens, the support exhibits overall rigidity and cannot effectively convert the energy released by the rockburst. Energy absorption can only be achieved through equipment failure, often resulting in various failures such as cylinder expansion, bending, cylinder bursting, and breakage. The support is the last link in roadway support; its failure alters the overall integrity and stability of the roadway, posing a significant threat to worker safety and production safety.

[0005] Through on-site investigation and theoretical analysis, it was found that when the roadway roof experiences dynamic loads such as rock bursts, the force acting on the support device is not uniformly distributed, often leading to stress concentration and localized damage. Furthermore, during the use of existing supports, it was discovered that portal frames are the most effective at ensuring roadway integrity. This is because portal frames can form a cross-sectional support pattern, while the roadway exhibits complex stresses, with stress concentrations occurring in various directions, such as floor heave and coal outbursts. This causes other supports to tilt to varying degrees. However, portal frames are complex to move and are unsuitable for situations requiring frequent relocation in the leading sections of the roadway. Under prolonged mining stress, the roadway deforms, causing roof and floor deformation and inward contraction of the two roadways, resulting in varying widths along the roadway's direction. Except for portal frames, most supports do not consider supporting these two roadways, and the width of portal frames is not adjustable, making them unsuitable for deformed roadways. Finally, supports are not effective at protecting themselves after large-energy events, often experiencing swelling, bending, cracking, or even bursting. Summary of the Invention

[0006] The present invention provides a self-regulating energy-absorbing and anti-collision hydraulic support for roadways and its usage method, which can overcome some or all defects of the prior art.

[0007] According to the present invention, a self-regulating energy-absorbing and anti-scour hydraulic support for roadways includes a unit support and a bridge-type energy-absorbing top beam. The bridge-type energy-absorbing top beam is disposed above the unit support, and the unit support supports the bridge-type energy-absorbing top beam located above it to achieve support for the roadway.

[0008] A unit support top beam is provided above the unit support. The upper end of the unit support top beam is designed with multiple rectangular positioning bosses. Multiple sets of limiting grooves are opened below both ends of the bridge-type energy-absorbing top beam. The multiple sets of limiting grooves are used in combination with the limiting grooves. Locking devices are provided on the front and rear sides of the unit support top beam. The bridge-type energy-absorbing top beam and the unit support top beam are connected as one unit by the locking devices.

[0009] The top of the bridge-type energy-absorbing top beam has multiple rectangular slots, and the top beam energy-absorbing components are installed inside the rectangular slots. Multiple adjacent top beam energy-absorbing components are combined with a top beam bearing plate to form a group of energy-absorbing areas. At the same time, the bridge-type energy-absorbing top beam is designed with multiple energy-absorbing areas to autonomously regulate the top pressure.

[0010] Preferably, the bridge-type energy-absorbing top beam is designed with a thick middle and thin sides according to the stress distribution law after being subjected to uniform load. Specifically, it includes a symmetrical structure of three parts: an upper platform beam segment, an arc-shaped beam segment, and a lower platform beam segment. The limiting groove is located below the upper platform beam segment, and the arc-shaped groove is opened on the side of the upper platform beam segment.

[0011] Preferably, a support base is provided below the unit support, and a bottom energy-absorbing device is provided on the outside of the support base. The support base includes a clamping device on the top, and a lower energy-absorbing device is provided on the outside of the clamping device. An upper energy-absorbing device is provided on the outside of the top beam of the unit support. Multiple energy-absorbing devices are provided to resist the impact of instantaneous failure of rock mass in different directions around the roadway on the support and protect the stability of the support structure.

[0012] Preferably, the bottom energy-absorbing device, the lower energy-absorbing device, and the upper energy-absorbing device all include a connecting base plate, an energy-absorbing component, and an outer bearing plate. Different types of rib plates are provided at multiple positions on the support base and the clamping device. A pair of L-shaped bosses are provided at the rear of the bottom energy-absorbing device, the lower energy-absorbing device, and the upper energy-absorbing device to facilitate sliding into the corresponding slide rail.

[0013] Preferably, an anti-tipping device is provided on the inner side of the two unit supports and hinged to the support base, including a bottom bearing plate and an anti-tipping jack. The bottom bearing plate is provided with a rear lug that cooperates with the lug on the unit support base and is fixed by a cylindrical pin. The piston of the anti-tipping jack is provided with a front lug that cooperates with the lug on the bottom bearing plate and is fixed by a cylindrical pin.

[0014] Furthermore, based on the aforementioned self-regulating energy-absorbing and anti-scour hydraulic support for roadways, the present invention also provides a method for using the self-regulating energy-absorbing and anti-scour hydraulic support for roadways, comprising:

[0015] ① Select a suitable bridge-type energy-absorbing top beam according to the requirements, and use it in combination with unit brackets and their top beams for double-row section support. Alternatively, unit brackets can be used alone to form a single-row support. For double-row section support, a suitable number of energy-absorbing components can be selected and combined with a top beam bearing plate to form a group of energy-absorbing areas.

[0016] ② Assemble the bridge-type energy-absorbing top beam, unit support, bottom energy-absorbing device, lower energy-absorbing device, upper energy-absorbing device and anti-overturning device separately, and transport them to the section that needs support.

[0017] ③ Place the bridge-type energy-absorbing top beam on the unit support so that the limiting groove and the positioning boss cooperate and overlap.

[0018] ④ Install the locking device, adjust the distance between the two unit supports to the appropriate position, and lock the bridge-type energy-absorbing top beam to the unit support through the locking device.

[0019] ⑤ Install the bottom energy absorption device, lower energy absorption device, upper energy absorption device and anti-overturning device, and adjust the height of the unit support column and the angle of the anti-overturning device for support.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] ① The bridge-type energy-absorbing top beam uses four energy-absorbing components and a top beam bearing plate to form a group of energy-absorbing areas, which increases its self-regulation ability, can solve the problem of uneven stress on the support top beam, and realize multi-point multi-support protection of the support top beam, so as to have better adaptability and impact resistance.

[0022] ② The bridge-type energy-absorbing top beam is designed with a thicker middle section and thinner sides, which can better adapt to the stress effect of uniformly distributed loads on the beam.

[0023] ③ The bridge-type energy-absorbing top beam and the unit supports on both sides are fixed by a locking mechanism, which makes it easy to disassemble and transport. It can also be freely assembled and matched. The bridge-type energy-absorbing top beam is combined with the unit supports and the unit support top beam to form a double-row section support. Alternatively, the unit supports can be used alone to form a single-row support, which meets the characteristics of better stability and safety of section support, and also has the advantage of strong mobility of single-row support.

[0024] ④ The bridge-type energy-absorbing top beam is connected to the unit supports on both sides by a combination of limiting grooves and positioning bosses. With the multi-position locking mode of the locking mechanism, the two unit supports are adjustable in the width direction of the roadway, making them more adaptable to the width of the roadway.

[0025] ⑤ It can effectively resist damage to equipment from dynamic loads at multiple locations such as side protrusions, lateral stress concentrations, lateral impact pressures, and bottom heaves, achieving multi-point energy absorption and playing a significant role in preventing impact pressures. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of a bridge-type energy-absorbing roof beam structure.

[0028] Figure 3 This is a schematic diagram of the top beam and locking device of the unit support structure;

[0029] Figure 4 This is a schematic diagram showing the connection between the bridge-type energy-absorbing top beam and the unit support.

[0030] Figure 5 This is a schematic diagram of the unit support structure.

[0031] in:

[0032] 1. Unit support bracket 1; 2. Clamping device; 3. Support base; 301. Ear seat; 4. Anti-tipping device; 401. Bottom bearing plate; 402. Anti-tipping jack; 403. Rear lug; 404. Front lug; 405. Ear seat; 5. Unit support top beam; 501. Positioning boss; 6. Bottom energy absorption device; 7. Lower energy absorption device; 8. Upper energy absorption device; 9. Bridge-type energy absorption top beam; 901. Upper platform beam segment; 902. Arc-shaped beam segment; 903. Lower platform beam segment; 904. Top beam energy absorption component; 905. Top beam bearing plate; 906. Arc-shaped groove; 907. Limiting groove; 10. Locking device; 1001. Fixing seat; 1002. Base; 1003. Pressure rod; 1004. Pressure head; 1005. Limiting pin. Detailed Implementation

[0033] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0034] Example 1

[0035] like Figures 1-5 As shown, a self-regulating energy-absorbing and anti-collision hydraulic support for roadways includes a unit support 1 and a bridge-type energy-absorbing top beam 9. The bridge-type energy-absorbing top beam 9 is located above the unit support 1, and the unit support 1 supports the bridge-type energy-absorbing top beam 9 located above to achieve support for the roadway.

[0036] A unit support top beam 5 is provided above the unit support 1. The upper end of the unit support top beam 5 is designed with multiple rectangular positioning bosses 501. Multiple sets of limiting grooves 907 are opened below both ends of the bridge-type energy-absorbing top beam 9. The multiple sets of limiting grooves 907 are used in conjunction with the positioning bosses 501. The positioning bosses 501 and the limiting grooves 907 can generate relative displacement in the width direction of the roadway, but play a limiting role in the length direction of the roadway, preventing the bridge-type energy-absorbing top beam 9 from sliding laterally on the unit support top beam 5. Locking devices 10 are provided on the front and rear sides of the unit support top beam 5. The bridge-type energy-absorbing top beam 9 and the unit support top beam 5 are connected as one unit by the locking devices 10 to prevent the two sides from shrinking inward or the bridge-type energy-absorbing top beam 9 from falling off. With this setting, the present invention will be easy to transport and disassemble. The locking device 10 can be set as a bolt locking device.

[0037] The top of the bridge-type energy-absorbing top beam 9 has multiple rectangular slots, and the top beam energy-absorbing components 904 are installed inside the rectangular slots. Multiple adjacent top beam energy-absorbing components 904 are paired with a top beam bearing plate 905 to form a group of energy-absorbing areas. In this embodiment, every four adjacent top beam energy-absorbing components 904 are paired with a top beam bearing plate 905 to form a group of energy-absorbing areas. At the same time, the bridge-type energy-absorbing top beam 9 is designed with multiple energy-absorbing areas to autonomously regulate the top pressure, solve the problem of uneven stress on the support top beam, and achieve a multi-point multi-support force protection effect for the support top beam, that is, to achieve stress self-regulation, so as to have better adaptability and impact resistance.

[0038] The locking device 10 includes a fixed seat 1001, a base 1002, a pressure rod 1003, and a pressure head 1004. The fixed seat 1001 is welded to the bottom end of the unit support top beam 5 to facilitate the fixing of the pressure rod 1003. The base 1002 is welded to the side of the unit support top beam 5 and has a connecting rod inside to hinge the pressure rod 1003 to the base 1002. At the same time, the pressure head 1004 is hinged to the base 1002, and the pressure rod 1003 is hinged to the pressure head 1004 to form a four-bar linkage for the rotation and limiting of the pressure rod 1003 and the pressure head 1004. Arc-shaped grooves 906 are provided on both sides of the bridge-type energy-absorbing top beam 9. The pressure head 1004 matches the arc-shaped grooves 906 so that the pressure head 1004 can be precisely inserted into the arc-shaped grooves 906 to achieve the limiting and fixing of the unit support top beam 5 and the bridge-type energy-absorbing top beam 9.

[0039] When locking is required, the pressure rod 1003 swings down, and the pressure head 1004 swings towards the bridge-type energy-absorbing top beam 9. The pressure head 1004 is engaged in the arc-shaped groove 906. At this time, the pin hole at the bottom of the pressure rod 1003 is aligned with the pin hole on the fixed seat 1001. The limiting pin 1005 is passed through the pin hole at the bottom of the pressure rod 1003 and the pin hole on the fixed seat 1001 to limit the pressure rod 1003, thereby limiting and fixing the pressure head 1004 and realizing the pressing action. When loosening is required, the limiting pin 1005 is pulled out, the pressure rod 1003 is swung up, and the pressure head 1004 rotates and lifts accordingly, realizing the loosening action.

[0040] The bridge-type energy-absorbing top beam 9 is designed with a thick middle and thin sides according to the stress distribution law after being subjected to uniform load. Specifically, it includes three symmetrical structures: upper platform beam section 901, arc-shaped beam section 902, and lower platform beam section 903. The limiting groove 907 is located below the upper platform beam section 901, and the arc-shaped groove 906 is opened on the side of the upper platform beam section 901.

[0041] To ensure reliability, at least two sets of locking devices 10 are provided on the front and rear sides of the top beam 5 of the unit support. Multiple arc-shaped grooves 906 are opened on the side of the upper platform beam section 901 of the bridge-type energy-absorbing top beam 9, which work in conjunction with the locking devices 10 to adjust the distance between the two unit supports 1.

[0042] The number of arc-shaped grooves 906 is an integer multiple of the locking device 10, forming multiple width adjustments to improve the adaptability of the support to the roadway. In this embodiment, the number of arc-shaped grooves 906 is three times that of the locking device 10, forming three width adjustments.

[0043] A support base 3 is provided below the unit support 1. A bottom energy absorption device 6 is provided on the outside of the support base 3. The support base 3 includes a clamping device 2 located on the top. A lower energy absorption device 7 is provided on the outside of the clamping device 2. An upper energy absorption device 8 is provided on the outside of the top beam 5 of the unit support. Multiple energy absorption devices are provided to resist the impact of instantaneous failure of rock mass in different directions around the roadway on the support and protect the stability of the support structure.

[0044] The bottom energy-absorbing device 6, the lower energy-absorbing device 7, and the upper energy-absorbing device 8 all include a connecting base plate, an energy-absorbing component, and an outer bearing plate. To ensure the lateral bearing capacity, stability, and uniformity of force of the support, different types of rib plates are provided at multiple positions of the support base 3 and the clamping device 2. A pair of L-shaped bosses are provided at the rear of the bottom energy-absorbing device 6, the lower energy-absorbing device 7, and the upper energy-absorbing device 8 to facilitate sliding into the corresponding slide rail.

[0045] An anti-tipping device 4, hinged to the support base 3, is provided on the inner side of the two unit supports 1. It includes a bottom bearing plate 401 and an anti-tipping jack 402. The anti-tipping jack 402 has a rear lug 403 that cooperates with the lug 301 on the unit support base 3 and is fixed by a cylindrical pin. The piston of the anti-tipping jack 402 has a front lug 404 that cooperates with the lug 405 on the bottom bearing plate 401 and is fixed by a cylindrical pin. The anti-tipping device 4 can be opened according to the usage requirements. On the one hand, it can increase the contact area between the support and the ground and reduce the ground pressure. On the other hand, it can effectively resist the overturning phenomenon caused by the bottom heave.

[0046] Furthermore, based on a self-regulating energy-absorbing and anti-scour hydraulic support for roadways, this invention also provides a method for using the self-regulating energy-absorbing and anti-scour hydraulic support for roadways, comprising:

[0047] ① Select a suitable bridge-type energy-absorbing top beam 9 according to the requirements, and use it in combination with unit support 1 and its unit support top beam 5 for double-row section support. Alternatively, unit support 1 can be used alone to form a single-row support. For double-row section support, a suitable number of energy-absorbing components can be selected and combined with a top beam bearing plate 905 to form a group of energy-absorbing areas. This method introduces double-row section support.

[0048] ② Assemble the bridge-type energy-absorbing top beam 9, unit support 1, bottom energy-absorbing device 6, lower energy-absorbing device 7, upper energy-absorbing device 8 and anti-overturning device 4 respectively, and transport them to the section position that needs support.

[0049] ③ Place the bridge-type energy-absorbing top beam 9 on the unit bracket 1 so that the limiting groove 907 and the positioning boss 501 cooperate and overlap.

[0050] ④ Install the locking device 10, adjust the distance between the two unit supports 1 to an appropriate position, and lock the bridge-type energy-absorbing top beam 9 to the unit support 1 through the locking device 10.

[0051] ⑤ Install the bottom energy absorption device 6, the lower energy absorption device 7, the upper energy absorption device 8 and the anti-overturning device 4, and adjust the height of the column of the unit support 1 and the angle of the anti-overturning device 4 for support.

[0052] When locking is required, the pressure rod 1003 swings down, and the pressure head 1004 swings towards the bridge-type energy-absorbing top beam 9. The pressure head 1004 is engaged in the arc-shaped groove 906. At this time, the pin hole at the bottom of the pressure rod 1003 is aligned with the pin hole on the fixed seat 1001. The limiting pin 1005 is passed through the pin hole at the bottom of the pressure rod 1003 and the pin hole on the fixed seat 1001 to limit the pressure rod 1003, thereby limiting and fixing the pressure head 1004 and realizing the pressing action. When loosening is required, the limiting pin 1005 is pulled out, the pressure rod 1003 is swung up, and the pressure head 1004 rotates and lifts accordingly, realizing the loosening action.

[0053] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A self-regulating energy-absorbing and anti-collision hydraulic support for roadways, comprising a unit support (1) and a bridge-type energy-absorbing top beam (9), wherein the bridge-type energy-absorbing top beam (9) is disposed above the unit support (1), and the bridge-type energy-absorbing top beam (9) located above is supported by the unit support (1) to achieve support for the roadway; characterized in that A unit support top beam (5) is provided above the unit support (1). Multiple rectangular positioning bosses (501) are designed on the upper end of the unit support top beam (5). Multiple sets of limiting grooves (907) are opened below both ends of the bridge-type energy-absorbing top beam (9). The multiple sets of limiting grooves (907) are used in conjunction with the rectangular positioning bosses (501). Locking devices (10) are provided on the front and rear sides of the unit support top beam (5). The bridge-type energy-absorbing top beam (9) and the unit support top beam (5) are connected as one unit through the locking devices (10). The top of the bridge-type energy-absorbing top beam (9) is provided with multiple rectangular grooves, and the top beam energy-absorbing components (904) are provided inside the rectangular grooves. Multiple adjacent top beam energy-absorbing components (904) are combined with a top beam bearing plate (905) to form a group of energy-absorbing areas. At the same time, the bridge-type energy-absorbing top beam (9) is designed with multiple energy-absorbing areas to autonomously regulate the top pressure.

2. The self-regulating energy-absorbing bump-protecting hydraulic support according to claim 1, characterized in that: The bridge-type energy-absorbing top beam (9) is designed with a thick middle and thin sides according to the stress distribution law after being subjected to uniform load. Specifically, it includes a symmetrical structure of three parts: upper platform beam section (901), arc beam section (902) and lower platform beam section (903). The limiting groove (907) is located below the upper platform beam section (901), and the arc groove (906) is opened on the side of the upper platform beam section (901).

3. The self-regulating energy-absorbing and anti-scour hydraulic support for roadways according to claim 2, characterized in that: A support base (3) is provided below the unit support (1). A bottom energy-absorbing device (6) is provided on the outside of the support base (3). The support base (3) includes a clamping device (2) located on the top. A lower energy-absorbing device (7) is provided on the outside of the clamping device (2). An upper energy-absorbing device (8) is provided on the outside of the top beam (5) of the unit support. Multiple energy-absorbing devices are provided to resist the impact of instantaneous destruction of rock masses in different directions around the roadway on the support and protect the stability of the support structure.

4. The self-regulating energy-absorbing and anti-scour hydraulic support for roadways according to claim 3, characterized in that: The bottom energy-absorbing device (6), the lower energy-absorbing device (7), and the upper energy-absorbing device (8) all include a connecting base plate, an energy-absorbing component, and an outer bearing plate. Different types of rib plates are provided at multiple positions on the support base (3) and the clamping device (2). A pair of L-shaped bosses are provided at the rear of the bottom energy-absorbing device (6), the lower energy-absorbing device (7), and the upper energy-absorbing device (8) to facilitate sliding into the corresponding slide rail.

5. The self-regulating energy-absorbing and anti-scour hydraulic support for roadways according to claim 4, characterized in that: An anti-tipping device (4) is provided on the inner side of the two unit supports (1) and hinged to the support base (3), including a bottom support plate (401) and an anti-tipping jack (402). The bottom support plate (401) is provided with a rear lug (403) which cooperates with the ear seat (301) on the unit support base (3) and is fixed by a cylindrical pin. The piston of the anti-tipping jack (402) is provided with a front lug (404) which cooperates with the ear seat (405) on the bottom support plate (401) and is fixed by a cylindrical pin.

6. A method for using a self-regulating energy-absorbing and anti-scour hydraulic support for roadways, employing any one of the self-regulating energy-absorbing and anti-scour hydraulic supports as described in claims 1-5, characterized in that: include, ① Select the appropriate bridge-type energy-absorbing top beam (9) according to the requirements, and use it in conjunction with the unit support (1) and its unit support top beam (5) for double-row section support. Alternatively, the unit support (1) can be used alone to form a single-row support. For double-row section support, select an appropriate number of energy-absorbing components and use a top beam bearing plate (905) to form a group of energy-absorbing areas. ② Assemble the bridge-type energy-absorbing top beam (9), unit support (1), bottom energy-absorbing device (6), lower energy-absorbing device (7), upper energy-absorbing device (8) and anti-overturning device (4) respectively, and transport them to the section position that needs support; ③ Place the bridge-type energy-absorbing top beam (9) on the unit bracket (1) so that the limiting groove (907) and the positioning boss (501) cooperate and overlap; ④ Install the locking device (10), adjust the distance between the two unit supports (1) to an appropriate position, and lock the bridge energy-absorbing top beam (9) to the unit support (1) through the locking device (10); ⑤ Install the bottom energy absorption device (6), the lower energy absorption device (7), the upper energy absorption device (8) and the anti-overturning device (4), and adjust the column height of the unit support (1) and the angle of the anti-overturning device (4) for support.

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