Anti-collision road and bridge safety guardrail and installation method

Abstract

The present application relates to the technical field of guardrails, in particular to a kind of anti-collision road bridge safety guardrails and a kind of anti-collision road bridge safety guardrails installation method;Including pedestal, guardrail is installed on pedestal, the guardrail is composed of stake pole and the crossbar being installed between stake pole;The guardrail is set on pedestal by hinged module, so that the guardrail can be obliquely set to the side of pedestal, and the side of the pedestal is provided with elastic limiting module for bracing the guardrail;The top of guardrail is further provided with limiting fence, which is hingedly arranged on the top of guardrail and is set on the top of guardrail in obtuse angle folding state in natural state, and in unnatural state, the limiting fence is set on the top of guardrail in acute angle folding state;Rigid protection module is vertically fixed on the pedestal and is closely adjacent to the guardrail, to achieve primary buffer protection for the guardrail;The present application not only can multi-stage flexible interception to impact object but also can flexible limiting to impact object, and the protection effect is good.

Description

Technical Field

[0001] This invention relates to the field of guardrail technology, specifically to an anti-collision road and bridge safety guardrail and an installation method for the anti-collision road and bridge safety guardrail. Background Technology

[0002] Road and bridge safety guardrails refer to guardrails installed on roads or bridges. Guardrails on bridges are designed to prevent out-of-control vehicles from going off the bridge; road guardrails are installed on the outer shoulder of the road and absorb collision energy to change the direction of vehicles, preventing them from going off the road or entering the oncoming lane. When a vehicle collides with a guardrail, it absorbs energy, making it less likely to be destroyed, and providing excellent protection for the vehicle and its occupants.

[0003] For example, the road and bridge safety guardrail disclosed in patent CN114561870A uses a buffer element and anti-collision plate on the guardrail to block the impacting object and absorb the kinetic energy generated upon impact. However, in actual use, the buffer element has a short buffer stroke, and if it fails to provide effective buffering, the impacting object will still hit the guardrail. The guardrail is equipped with an anti-collision plate and is installed on the foundation using a high-strength connection method. This results in a rigid contact when the impacting object hits the guardrail, similar to a direct impact with a wall. It cannot provide effective buffering protection, and when the impacting object breaks through the guardrail, it will directly pass under the bridge or into the opposite lane. The impact will cause the guardrail to tilt, affecting its normal protective performance and posing a safety hazard. The protection method is too simplistic and will cause significant damage to the impacting object during the protection process. Summary of the Invention

[0004] To address the aforementioned issues, a road and bridge safety guardrail designed to prevent collisions is provided. This guardrail features a multi-level flexible protective structure that can further limit and intercept vehicles even after it has collapsed. This solves the technical problem that existing guardrails rely on a single, rigid interception method, which can cause significant damage to the impacting objects.

[0005] To address the problems of existing technologies, this invention provides a road and bridge safety guardrail for impact protection, comprising a base and a guardrail installed on the base. The guardrail consists of piles and crossbars installed between the piles. The guardrail is mounted on the base via a hinged module, allowing it to tilt towards one side of the base. An elastic limiting module is provided on one side of the base to support the guardrail. The guardrail achieves intermediate-level buffer protection against impacts through the elastic limiting module.

[0006] The top of the guardrail is also equipped with a limit bar, which is hinged to the top of the guardrail and folded at an obtuse angle in its natural state, and folded at an acute angle in its non-natural state, in order to achieve advanced buffer protection.

[0007] The rigid protection module is vertically fixed on the base and placed close to the guardrail to provide primary buffer protection for the guardrail.

[0008] Preferably, the rigid protection module is provided with multiple sets of energy-absorbing arc plates arranged in a crisscross pattern along the long side of the guardrail, with the arc surface of the energy-absorbing arc plate positioned on the side closest to the road.

[0009] Preferably, a buffer gap is left between the rigid protection module and the guardrail.

[0010] Preferably, the hinge module includes a fixed hinge part and a movable hinge part that are hinged to each other; the fixed hinge part is fixedly installed on the base; and the movable hinge part is fixedly installed at the bottom of the pile.

[0011] Preferably, a rigid limiting sleeve is also fitted over the hinge module to rigidly limit the movement of the hinge module.

[0012] Preferably, the elastic limiting module is provided with a buffer element for releasing the kinetic energy of the guardrail and an elastic traction element disposed at the end of the buffer element; the buffer element is hinged to the pile and the elastic traction element respectively through hinge seats disposed at both ends.

[0013] Preferably, the elastic traction element is provided with a limiting block that can slide back and forth along the tilting direction of the guardrail and a tension spring for elastically tractioning the limiting block.

[0014] Preferably, the limiting bar is arc-shaped and has a movable shaft, and is hinged to the top of the guardrail through the movable shaft; the limiting bar also has a limiting shaft for limiting the limiting bar at an obtuse angle to the top of the guardrail; in the limiting state, the arc-shaped surface of the limiting bar is inclined toward the elastic limiting module.

[0015] Preferably, the limiting shaft is an aluminum rod.

[0016] A method for installing a collision-resistant road and bridge safety guardrail, applicable to a collision-resistant road and bridge safety guardrail, includes the following steps:

[0017] S1: First, the guardrail is fixed vertically to the base using the hinge module;

[0018] S2: Then install the elastic limit module on the other side of the guardrail away from the road, and provide elastic support to the guardrail in an inclined state;

[0019] S3: The rigid protection module is vertically fixed relative to the elastic limiting module on the side of the guardrail closest to the road, and a buffer gap is left between the rigid protection module and the guardrail.

[0020] S3: Finally, the limit bar is hinged and installed on the top of the pile rod through the movable shaft, and at the same time, the installation angle between the limit bar and the pile rod is obtuse.

[0021] The advantages of this invention compared to the prior art are:

[0022] This invention achieves primary buffering of impacting objects through a rigid protection module; intermediate buffering through guardrails, hinged modules, and elastic limiting modules; and advanced buffering through limiting rails. Compared with the rigid buffering methods of the prior art, this invention adopts a multi-level flexible buffering method to buffer and protect impacting objects, maximizing the absorption of the kinetic energy of the impacting object while using multiple methods to provide graded protection, resulting in better buffering effect. Attached Figure Description

[0023] Figure 1 A three-dimensional safety guardrail for road and bridges to prevent collisions. Figure 1 .

[0024] Figure 2 A three-dimensional safety guardrail for road and bridges to prevent collisions. Figure 2 .

[0025] Figure 3 This is a 3D view of the guardrails and limit rails in the buffer state of a road and bridge safety guardrail designed to prevent collisions.

[0026] Figure 4 This is a three-dimensional exploded view of a road and bridge safety guardrail with the limit bars removed.

[0027] Figure 5 This is a three-dimensional front view of a section of a road and bridge safety guardrail with the rigid protective module removed.

[0028] Figure 6 yes Figure 5 Sectional view at point AA.

[0029] Figure 7 yes Figure 6 A magnified view of section B.

[0030] Figure 8 yes Figure 7 A magnified view of a portion of point C.

[0031] Figure 9 This is a three-dimensional structural diagram of a road and bridge safety guardrail with the guardrail and rigid protection modules removed.

[0032] The numbers on the map are:

[0033] 1-Base;

[0034] 2-Guardrail; 21-Pile post; 22-Horizontal bar;

[0035] 3-Hinged module; 31-Fixed hinge part; 32-Modible hinge part; 33-Rigid limiting sleeve; 331-Break groove;

[0036] 4-Elastic limit module; 41-Buffer element; 411-Fixed sleeve rod; 412-Telescopic rod; 413-Spring; 414-Adjusting disc; 415-Flange; 42-Hinge seat; 43-Elastic traction element; 431-Limit block; 432-Tension spring; 433-Guide seat;

[0037] 5-Limit rail; 51-Moving shaft; 52-Limit shaft; 53-Reinforcing rod;

[0038] 6-Rigid protective module; 61-Energy-absorbing arc plate; 62-Rigid mounting bracket; 621-Connecting base frame; 622-Rigid protective plate. Detailed Implementation

[0039] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0040] See Figures 1 to 9 As shown: A road and bridge safety guardrail for impact protection includes a base 1 and a guardrail 2 installed on the base 1. The guardrail 2 is composed of piles 21 and crossbars 22 installed between the piles 21. The guardrail 2 is set on the base 1 through a hinge module 3, so that the guardrail 2 can be tilted towards one side of the base 1. An elastic limiting module 4 for supporting the guardrail 2 is provided on one side of the base 1. The guardrail 2 achieves intermediate buffer protection against impacting objects through the elastic limiting module 4.

[0041] The top of the guardrail 2 is also provided with a limit bar 5. The limit bar 5 is hinged to the top of the guardrail 2 and is folded at an obtuse angle in the natural state. In the non-natural state, the limit bar 5 is folded at an acute angle in the top of the guardrail 2 to achieve advanced buffer protection.

[0042] The rigid protection module 6 is vertically fixed on the base 1 and adjacent to the guardrail 2 to provide primary buffer protection for the guardrail 2.

[0043] The base 1 is the foundation for installing the guardrail 2, such as a concrete pile, a hardened road surface, or other limiting steel rods. After the guardrail 2 is installed on the base 1 through the hinge module 3, it can tilt and swing freely to the left or right of the base 1, giving it the freedom to swing left and right. The elastic limiting module 4, which is set on one side of the base 1 to support the guardrail 2, is installed on the side of the guardrail 2 away from the motor vehicle road. The rigid protection module 6 is set on the other side of the guardrail 2, that is, the side closer to the motor vehicle road, relative to the elastic limiting module 4.

[0044] In the event of a collision, the impacting object first strikes the rigid protection module 6, which provides initial energy absorption and buffering protection. When the impact force exceeds the rigid protection module 6's withstand capacity, it breaks and tilts towards the guardrail 2, transferring the impact force to the guardrail 2. The guardrail 2 then tilts towards the elastic limiting module 4, transferring kinetic energy to the elastic limiting module 4 during this tilting process, thus providing intermediate buffering protection. Furthermore, if the impacting object travels too fast, it sequentially breaks the rigid protection module 6, the guardrail 2, and the elastic limiting module 4. After the limit module 4 is knocked down, the guardrail 2, which is tilted on the ground, finally works in conjunction with the limit barrier 5 to form an acute angle between the limit barrier 5 and the horizontally tilted guardrail 2, preferably slightly less than 90 degrees. Since the impacting object has absorbed most of its kinetic energy after hitting the rigid protection module 6 and the elastic limit module 4 in sequence, the limit barrier 5, which forms an acute angle with the tilted guardrail 2, is used to provide final buffer protection for the impacting object in order to prevent it from passing through the tilted guardrail 2 and moving to other lanes or even falling off the bridge. The limit barrier 5 is set up as a "barb" to intercept the impacting object and prevent it from falling off the bridge, thus achieving advanced buffer protection for the impacting object.

[0045] See Figure 4 As shown: The rigid protection module 6 is provided with multiple sets of energy-absorbing arc plates 61 arranged horizontally and vertically along the long side of the guardrail 2, with the arc surface of the energy-absorbing arc plate 61 set on the side closest to the road.

[0046] The rigid protection module 6 also includes a rigid mounting frame 62, which consists of a connecting base frame 621 and a rigid guard plate 622 disposed on the top of the connecting base frame 621. The rigid guard plate 622 is shaped to fit the shape of the guardrail 2, so that it can be snapped onto the outside of the guardrail 2. The energy-absorbing arc plate 61 is detachably disposed on the side of the rigid guard plate 622 that is close to the road. The energy-absorbing arc plates 61 are all arc-shaped and form a collapsible cavity with the rigid guard plate 622.

[0047] When an impacting object strikes the rigid protection module 6, the impact force generated by the impacting object is absorbed by the energy-absorbing arc plate 61, which is the first point of contact with the impacting object, thus achieving buffering and energy absorption of the impacting object. If the kinetic energy generated by the impacting object cannot be stopped after being absorbed by the energy-absorbing arc plate 61, the kinetic energy of the impacting object will be transferred to the rigid mounting frame 62 through the energy-absorbing arc plate 61. The rigid mounting frame 62 absorbs the further kinetic energy, thus achieving the initial buffering work of the impacting object. Furthermore, if the rigid protection module 6 is still unable to absorb the kinetic energy generated by the impacting object, it will cause the connection between the rigid protection module 6 and the base 1 to break, and the kinetic energy will be transferred to the elastic limiting module 4, thereby cooperating with the elastic limiting module 4 to provide further buffering protection.

[0048] See Figure 4 As shown: A buffer gap is left between the rigid protection module 6 and the guardrail 2.

[0049] The rigid protection module 6 is installed close to the guardrail 2 during installation, but with a certain installation gap. This prevents the kinetic energy absorbed by the rigid protection module 6 from being transferred to the guardrail 2 during the initial buffering protection of the impacting object, thus avoiding damage to the guardrail 2 and causing the guardrail 2 to intervene in the buffering protection work too early. In addition, the installation gap is the movement gap of the rigid protection module 6 when absorbing energy, allowing it to rebound autonomously after the initial energy absorption.

[0050] See Figure 7 As shown: The hinge module 3 includes a fixed hinge part 31 and a movable hinge part 32 that are hinged to each other; the fixed hinge part 31 is fixedly installed on the base 1; the movable hinge part 32 is fixedly installed at the bottom of the pile rod 21.

[0051] The pile 21 is hinged to the fixed hinge 31 fixed on the base 1 via the movable hinge 32 fixed at the bottom, so that the pile 21 has the freedom to swing left and right. Thus, when providing intermediate buffer protection for the impacting object, it works with the elastic limit module 4 to realize how to absorb energy from the impacting object and release energy after absorption, thereby achieving flexible buffering of the impacting object and minimizing the impact force of the impacting object.

[0052] See Figure 7 As shown: A rigid limiting sleeve 33 is also fitted outside the hinge module 3 to rigidly limit the movement of the hinge module 3.

[0053] The rigid limiting sleeve 33 is a hollow rectangular shell with openings at both ends and a fracture groove 331 on the outer wall in the middle. Under the action of the rigid limiting sleeve 33, the pile rod 21, which is fixed on the base 1 by the hinge module 3, does not have the freedom to swing left and right. When the impacting object hits the rigid protection module 6, the rigid protection module 6 cannot absorb the kinetic energy of the impacting object. At this time, the kinetic energy is transmitted to the guardrail 2 and absorbed by the guardrail 2. If the kinetic energy absorbed by the guardrail 2 is greater than that of the rigid limiting sleeve 33, it will cause the limiting sleeve to tear from the fracture groove 331, so that the guardrail 2 has the freedom to swing left and right and at the same time cooperates with the elastic limiting module 4 to absorb the kinetic energy, thereby realizing the intermediate flexible buffering work of the impacting object.

[0054] See Figure 2 As shown: The elastic limiting module 4 is provided with a buffer element 41 for releasing the kinetic energy of the guardrail 2 and an elastic traction element 43 disposed at the end of the buffer element 41; the buffer element 41 is hinged to the pile rod 21 and the elastic traction element 43 respectively through the hinge seats 42 disposed at both ends.

[0055] The buffer element 41 consists of a telescopic rod 412 telescopically disposed within a fixed sleeve 411 and a spring 413 sleeved and installed outside the telescopic rod 412 and the fixed sleeve 411; the fixed sleeve 411 is also provided with external threads and an adjusting disc 414 screwed onto the fixed sleeve 411; a flange 415 is coaxially fixedly disposed at the end of the telescopic rod 412, and the two ends of the spring 413 are respectively in contact with the adjusting disc 414 and the flange 415.

[0056] When the kinetic energy of the impacting object is transferred to the guardrail 2, the guardrail 2 tilts towards the elastic limiting module 4, transferring the received kinetic energy to the telescopic rod 412. The telescopic rod 412 contracts under force, simultaneously compressing the spring 413 with the flange 415, thus absorbing and buffering the kinetic energy. The compression ratio of the spring 413 can be self-adjusted by adjusting the adjusting disc 414, achieving flexible buffering with either a long or short stroke. When the kinetic energy of the impacting object is excessive, causing the spring 413 to compress to its limit and the telescopic rod 412 to fully retract, the kinetic energy is then transferred to the elastic traction element 43, which performs a final elastic release of the kinetic energy. If the traction limit of the elastic traction element 43 is exceeded, the bottom limit of the buffer element 41 will be actively released, causing the guardrail 2 to tilt completely, prompting the limiting barrier 5 to activate and providing advanced buffering protection for the impacting object.

[0057] See Figure 6 and Figure 9 As shown: The elastic traction element 43 is provided with a limiting block 431 that can slide back and forth along the tilting direction of the guardrail 2 and a tension spring 432 for elastically traction of the limiting block 431.

[0058] The buffer element 41 is fixedly connected to the limiting block 431 via the hinge seat 42. The elastic traction element 43 also includes a guide seat 433. The limiting block 431 is slidably disposed in the guide seat 433. The tension spring 432 is horizontally disposed in the guide seat 433 along the sliding direction of the limiting block 431. One end of the tension spring 432 is fixedly connected to the inner wall of the guide seat 433 and the other end is fixedly connected to the limiting block 431.

[0059] When the buffer element 41 can no longer absorb the kinetic energy transmitted by the guardrail 2, the buffer element 41 will transmit the kinetic energy to the limiting block 431 through the hinge seat 42, causing the limiting block 431 to slide along the guide direction of the guide seat 433. This releases the energy of the buffer element 41, which is compressed to the limit, by changing the limiting point. Since the limiting block 431 is elastically pulled by the tension spring 432, during the process of releasing the energy of the buffer element 41 by changing the limiting point, the tension spring 432 breaks when it is stretched to the limit, causing the limiting block 431 to be completely released. This releases the buffer element 41 simultaneously, preventing the buffer element 41 from being scrapped. Since the limiting block 431 loses the traction in the sliding direction, the buffer element 41 is fully extended and loses the traction point, causing the guardrail 2 to completely tilt and triggering the action of the limiting rail 5.

[0060] See Figure 8 As shown: The limiting bar 5 is arc-shaped and has a movable shaft 51, which is hinged to the top of the guardrail 2. The limiting bar 5 is also provided with a limiting shaft 52 for limiting the limiting bar 5 at an obtuse angle to the top of the guardrail 2. In the limiting state, the arc surface of the limiting bar 5 is inclined towards the elastic limiting module 4.

[0061] Multiple sets of the limiting rails 5 are provided corresponding to each pile 21, and all are hinged to the top of the pile 21 via a movable shaft 51. In the non-protected state, the limiting rails 5 are hinged to the top of the pile 21 at an obtuse angle via the limiting shaft 52. The limiting rails 5 are set vertically on the top of the pile 21, and the arc surface of the limiting rails 5 is tilted towards the side of the elastic limiting module 4. The arc surface of the limiting rails 5 is not the same plane as the plane of the pile 21 near the elastic limiting module 4. The obtuse angle folding of the limiting rails 5 refers to the angle between the far end of the limiting rails 5 and the plane of the pile 21 near the rigid protection module 6.

[0062] When guardrail 2, in conjunction with the elastic limiting module 4, fails to absorb the kinetic energy of the impacting object, guardrail 2 completely tilts over, at which point the impacting object is completely pressed onto guardrail 2. Since the curved surface of the limiting barrier 5 is tilted towards the side of the elastic limiting module 4 when not in operation, and the curved surface of the limiting barrier 5 is not on the same horizontal plane as the plane of the pile 21 near the elastic limiting module 4, when guardrail 2 tilts, an angle is formed between the parallel plane of the side of guardrail 2 near the elastic limiting module 4 and the curved surface of the limiting barrier 5. When the impacting object presses onto guardrail 2, the impacting object exerts its force on guardrail 2. The force will generate a shearing force from the movable shaft 51, thereby cutting off the limiting shaft 52 used to limit the angle of the limiting bar 5, so that the arc surface of the limiting bar 5 is adjusted to be at the same level as the plane near the elastic limiting module 4. When the arc surface of the limiting bar 5 is adjusted to be at the same level as the plane near the elastic limiting module 4, the limiting bar 5 folds at an acute angle, thereby forming a "barb" shape to intercept the impacting object and prevent it from falling through the guardrail 2 into the bridge or other lanes; a reinforcing rod 53 is also installed between the multiple sets of limiting bars 5.

[0063] See Figure 8 As shown: The limiting shaft 52 is an aluminum rod.

[0064] By using an aluminum rod as the limiting shaft 52, it is easier and faster to cut off the limiting bar 5 when it is released from the limit, and it has a certain strength of limiting capability when not in operation.

[0065] A method for installing a collision-resistant road and bridge safety guardrail, applicable to a collision-resistant road and bridge safety guardrail, includes the following steps:

[0066] S1: First, the guardrail 2 is fixed vertically on the base 1 using the hinge module 3;

[0067] S2: Then install the elastic limit module 4 on the other side of the guardrail 2 away from the road, and provide elastic support to the guardrail 2 in an inclined state;

[0068] S3: The rigid protection module 6 is vertically fixed relative to the elastic limiting module 4 on the side of the guardrail 2 closest to the road, and a buffer gap is left between the rigid protection module 6 and the guardrail 2.

[0069] S3: Finally, the limiting rail 5 is hinged to the top of the pile 21 via the movable shaft 51, and at the same time, the installation angle between the limiting rail 5 and the pile 21 is obtuse with the limiting shaft 52.

[0070] This invention can not only perform multi-stage flexible interception of impacting objects, but also flexibly limit the impacting objects, resulting in good protective effects.

[0071] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A road and bridge safety guardrail for collision prevention, comprising a base (1) and a guardrail (2) installed on the base (1), the guardrail (2) being composed of piles (21) and crossbars (22) installed between the piles (21); characterized in that, The guardrail (2) is mounted on the base (1) via a hinge module (3), allowing the guardrail (2) to be tilted toward the base (1) side. An elastic limiting module (4) is provided on one side of the base (1) to support the guardrail (2). The guardrail (2) achieves intermediate buffer protection against impacts through the elastic limiting module (4). The top of the guardrail (2) is also provided with a limiting bar (5). The limiting bar (5) is hinged to the top of the guardrail (2) and is folded at an obtuse angle in the natural state. In the non-natural state, the limiting bar (5) is folded at an acute angle in the top of the guardrail (2) to achieve advanced buffer protection. The rigid protection module (6) is vertically fixed on the base (1) and adjacent to the guardrail (2) to provide primary buffer protection for the guardrail (2); The rigid protection module (6) is provided with multiple sets of energy-absorbing arc plates (61) arranged in a crisscross pattern along the long side of the guardrail (2), with the arc surface of the energy-absorbing arc plate (61) located on the side closest to the road. A buffer gap is left between the rigid protection module (6) and the guardrail (2); The hinge module (3) is also fitted with a rigid limiting sleeve (33) to rigidly limit the movement of the hinge module (3); The limiting bar (5) is arc-shaped and has a movable shaft (51), which is hinged to the top of the guardrail (2) through the movable shaft (51); the limiting bar (5) is also provided with a limiting shaft (52) for limiting the limiting bar (5) at an obtuse angle to the top of the guardrail (2); the arc-shaped surface of the limiting bar (5) in the limiting state is inclined toward the elastic limiting module (4); When the rigid protection module (6) is still unable to absorb the kinetic energy generated by the impact, the connection between the rigid protection module (6) and the base (1) will break, and the kinetic energy will be transmitted to the elastic limiting module (4). The rigid limiting sleeve (33) is a hollow rectangular shell with openings at both ends and a fracture groove (331) is provided on the outer wall in the middle.

2. The anti-collision road and bridge safety guardrail according to claim 1, characterized in that, The hinge module (3) includes a fixed hinge part (31) and a movable hinge part (32) that are hinged to each other; the fixed hinge part (31) is fixedly installed on the base (1); the movable hinge part (32) is fixedly installed at the bottom of the pile rod (21).

3. The anti-collision road and bridge safety guardrail according to claim 2, characterized in that, The elastic limiting module (4) is provided with a buffer element (41) for releasing the kinetic energy of the guardrail (2) and an elastic traction element (43) set at the end of the buffer element (41); the buffer element (41) is hinged to the pile rod (21) and the elastic traction element (43) respectively through the hinge seats (42) set at both ends.

4. The anti-collision road and bridge safety guardrail according to claim 3, characterized in that, The elastic traction element (43) is provided with a limiting block (431) that can slide back and forth along the tilting direction of the guardrail (2) and a tension spring (432) for elastically traction of the limiting block (431).

5. The anti-collision road and bridge safety guardrail according to claim 4, characterized in that, The limiting shaft (52) is an aluminum rod.

6. A method for installing a collision-resistant road and bridge safety guardrail, applicable to a collision-resistant road and bridge safety guardrail as described in any one of claims 1-5, comprising the following steps: S1: First, the guardrail (2) is fixed vertically on the base (1) using the hinge module (3); S2: Then the elastic limit module (4) is installed on the other side of the guardrail (2) away from the road, and the guardrail (2) is tilted to provide elastic support; S3: The rigid protection module (6) is vertically fixed relative to the elastic limiting module (4) on the side of the guardrail (2) close to the road, and a buffer gap is left between the rigid protection module (6) and the guardrail (2); S3: Finally, the limit bar (5) is hinged to the top of the pile rod (21) by the movable shaft (51), and at the same time, the installation angle between the limit bar (5) and the pile rod (21) is obtuse with the limit shaft (52).

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