Expressway buffer pressure relief guide protective fence and installation method thereof

Abstract

The application relates to the technical field of highway safety protection facilities, and discloses a highway buffer pressure relief guide protection fence and a mounting method thereof, which comprises a stand column and a fence, the fence and the stand column are connected through a longitudinal buffer pressure relief assembly, the end of the fence is provided with a fixing hole and a transverse pressure relief groove, the fixing hole and the transverse pressure relief groove of the end of the adjacent fence are coincided and correspondingly installed with a connecting piece; the longitudinal buffer pressure relief assembly comprises oppositely arranged inner and outer bite-resistant blocks, the two bite-resistant blocks are matched through a plurality of connecting screws, the connecting screws are provided with springs, the two ends of the springs abut against the bite-resistant blocks, and the outer bite-resistant block is fixedly connected with the fence through the connecting screws; after the fence is suddenly and greatly impacted, the fence instantaneously retreats and releases force in the transverse and longitudinal directions, so that the rigid impact damage caused by the fence and a vehicle is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of highway safety protection facilities, and particularly relates to a highway buffer pressure relief guiding guardrail and a mounting method thereof. BACKGROUND

[0002] The highway crash barrier is the most important traffic infrastructure. At present, the highway crash barrier mostly adopts a steel structure, which is heavy in quality, large in rigidity, weak in impact absorption capacity when being subjected to impact, and basically lacks pressure relief capacity. In addition, the steel plate is rigidly collided with the vehicle body, which causes the vehicle body to be damaged or the guardrail to be broken, the vehicle body to be separated from the highway, and the passengers in the vehicle to be secondarily injured. Another defect of the traditional steel plate guardrail is that it is not easy to install and maintain, is high in cost, is poor in adaptability to road topography, is large in rigidity, is uncontrollable in breaking direction, and is short in service life.

[0003] A highway crash barrier based on multiple wire laying is disclosed in a Chinese patent with the application publication number CN108487134A, which sets four lines of defense, and the integrated whole of the four lines of defense can play a role in limiting displacement and attenuating impact energy when the vehicle is out of control. However, the four lines of defense are integrated in the longitudinal direction, and can only play a buffering role in the longitudinal direction, and cannot relieve pressure and guide in the transverse direction, so that the vehicle has the risk of secondary injury. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide a highway buffer pressure relief guiding guardrail and a mounting method thereof. After the guardrail is subjected to a sudden and great impact, instantaneous retreat and force relief buffering occur in the transverse and longitudinal directions, so as to reduce the rigid impact damage caused by the guardrail and the vehicle. In addition, the extension direction of the transverse pressure relief groove is changed according to the road conditions, so that the transverse pressure relief groove is guided in the safe direction, so as to ensure that the guardrail can still guarantee the protection effect and prevent secondary injury under the condition of deformation and force relief.

[0005] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0006] In a first aspect, a highway buffer pressure relief guiding guardrail includes a stand column and a guardrail, the guardrail and the stand column are connected through a longitudinal buffer pressure relief assembly, the end of the guardrail is provided with a fixing hole and a transverse pressure relief groove, the fixing hole and the transverse pressure relief groove of the adjacent end of the guardrail are coincided and correspondingly installed with a connecting piece; the longitudinal buffer pressure relief assembly includes oppositely arranged inner and outer bite-resistant blocks, the two bite-resistant blocks are cooperated through a plurality of connecting screws, the connecting screw is provided with a spring, the both ends of the spring are abutted with the bite-resistant blocks, and the outer bite-resistant block is fixedly connected with the guardrail through the connecting screw.

[0007] As a further implementation manner, the inner bite prevention block and the outer bite prevention block are both in C shape, the inner bite prevention block opening is away from the direction of the column, and the high-strength connecting piece is fixedly connected with the column.

[0008] As a further implementation manner, the height of the outer bite prevention block is greater than the height of the inner bite prevention block.

[0009] As a further implementation manner, the connecting screw rod is arranged at four corners of the bite prevention block, and the high-strength connecting piece is arranged between the connecting screw rods.

[0010] As a further implementation manner, the middle position of the guardrail is connected with the column.

[0011] As a further implementation manner, the fixing holes of the adjacent guardrails are connected by fixing bolts, the transverse pressure relief grooves of the adjacent guardrails are connected by high-strength connecting bolts, and the length extension direction of the transverse pressure relief grooves is determined according to the road condition.

[0012] In a second aspect, a mounting method of the highway buffer pressure relief guiding guardrail is provided, and the method comprises the following steps:

[0013] The column is staked after lofting, and then the column is formed by burying; the inner bite prevention block is fixedly connected with the column through the high-strength connecting piece, then the connecting screw rod is sleeved with the spring after penetrating through the guardrail and the outer bite prevention block, and then the connecting screw rod is connected with the inner bite prevention block, so that the connection of the longitudinal buffer pressure relief assembly is completed.

[0014] The fixing holes and the transverse pressure relief grooves of the end portions of the adjacent two guardrails are overlapped, the fixing holes are connected by fixing bolts, the transverse pressure relief grooves are connected by high-strength connecting bolts, the connection between the guardrails and the columns and the adjacent guardrails is continuously performed until the installation is completed, and the highway buffer pressure relief guiding guardrail is obtained.

[0015] As a further implementation manner, after the sample is placed, the column is staked according to the sample line, when the central separation belt is in the excavation section position, the hole is drilled before the column is staked to avoid the high column; if the high column appears after the column is staked, the column is immediately pulled out by the loader, the high column is abandoned and cannot be used again, and the column can be staked again after the hole is drilled.

[0016] As a further implementation manner, after the longitudinal buffer pressure relief assembly is installed, the correction is performed; after the adjacent guardrails are spliced, the overall line type of the guardrail is adjusted.

[0017] As a further implementation manner, the installation of the guardrail is performed after all the columns are installed and adjusted.

[0018] The beneficial effects of the above-mentioned application are as follows:

[0019] 1. The present application is a kind of highway guardrail, which can reduce the rigid impact damage caused by the guardrail and the vehicle after the guardrail is suddenly and heavily impacted, and can change the extension direction of the lateral pressure relief groove according to the road conditions, so as to guide the vehicle to the safe direction and ensure the protection effect and the prevention of secondary injury.

[0020] 2. The longitudinal buffer pressure relief assembly of the present application can prevent the heavy injury of the personnel after the impact of the vehicle on the protective guardrail, and the outer and inner bite blocks are displaced, the internal high-performance springs are slowly elastically deformed, and the internal buffer pressure relief effect is good.

[0021] 3. The lateral buffer pressure relief assembly of the present application can prevent the secondary injury after the impact of the vehicle on the protective guardrail, and the first guardrail and the second guardrail are subjected to lateral tension, the fixed bolt 8 is sheared when the tension reaches the limit strength value of the fixed bolt, and the high-strength connecting bolt slides along the lateral pressure relief groove, thereby achieving the effect of buffer pressure relief, and the position of the lateral pressure relief groove can guide the vehicle to the safe area, thereby further preventing the secondary injury. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings accompanying the specification of the present application are used to provide a further understanding of the present application, and the schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application.

[0023] Figure 1 is the overall structure schematic diagram of the highway buffer pressure relief guide protective guardrail in the embodiment of the present application;

[0024] Figure 2 is the structure schematic diagram of the lateral buffer pressure relief assembly in the embodiment of the present application;

[0025] Figure 3 is the structure schematic diagram of the longitudinal buffer pressure relief assembly in the embodiment of the present application;

[0026] Figure 4 is Figure 3 is the enlarged schematic diagram of the structure of part A.

[0027] In the drawings, the mutual distance or size is exaggerated to show the position of each part, and the schematic diagram is only illustrative.

[0028] In the drawings, 1 is a stand column, 2 is a longitudinal buffer pressure relief assembly, 3 is a high-strength connecting piece, 4 is a first guardrail, 5 is a second guardrail, 6 is a lateral pressure relief groove, 7 is a high-strength connecting bolt, 8 is a fixed bolt, 9 is a spring, 10 is a connecting screw, 11 is an outer bite block, and 12 is an inner bite block. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed description is illustrative only, and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0030] Embodiment one

[0031] In one typical embodiment of the present application, referring to Figures 1-4 , a highway buffer pressure relief guide guard rail, including a column 1 and a guard rail, the guard rail is fixedly connected with the top of the column 1, and the guard rail and the column 1 are connected through a longitudinal buffer pressure relief assembly 2 to realize the buffer capacity of the guard rail in the longitudinal direction. The two end portions of the guard rail coincide with the end portions of the adjacent guard rails and are matched through connecting pieces, and the end portions of the guard rail are provided with transverse pressure relief grooves 6 to realize the buffer capacity of the guard rail in the transverse direction.

[0032] As shown in Figure 3 and Figure 4 , the longitudinal buffer pressure relief assembly 2 includes oppositely arranged inner and outer bite blocks 12 and 11, and the two bite blocks are matched through a plurality of connecting screws 10, the connecting screws 10 are sleeved with springs 9 on the side, the ends of the springs 9 abut against the inner sides of the bite blocks, and the connecting screws 10 are fixedly connected with the inner bite blocks 12 after passing through the guard rail and the outer bite blocks 11 in sequence.

[0033] The middle position of the guard rail of the present embodiment is connected with the top position of the column through the longitudinal buffer pressure relief assembly 2, and the two ends of the guard rail coincide with the end portions of the adjacent guard rails and are connected through connecting pieces.

[0034] The inner and outer bite blocks 12 and 11 are oppositely arranged, both of which are C-shaped, the openings are opposite, the height of the outer bite block 11 is greater than that of the inner bite block 12, the size of the outer bite block 11 is greater than that of the inner bite block 12, and the outer bite block can cover the inner bite block if the relative movement occurs between the two bite blocks.

[0035] The opening of the inner bite block 12 is away from the side of the column, and the inner bite block 12 is square-shaped, and the center position thereof is fixedly connected with the column through a high-strength connecting piece 3.

[0036] The connecting screws 10 are arranged at the four corners of the bite blocks, and a total of four connecting screws are arranged, and the high-strength connecting piece 3 is arranged between the four connecting screws 10.

[0037] In the installation, first, the inner bite block 12 is fixed on the top of the column by the high-strength connecting piece 3, then the connecting screw rod 10 is passed through the guardrail, and then the spring is sleeved after passing through the outer bite block 11, and then the end of the connecting screw rod 10 is screwed with the inner bite block 12, at this time the spring 9 is located between the two bite blocks, and the ends of the spring 9 abut against the two bite blocks.

[0038] After the guardrail is hit by a vehicle, when the impact force causes the connecting point between the connecting screw rod 10 and the inner bite block to be damaged, the outer bite block 11 and the inner bite block 12 move, the four high-performance springs 9 inside the guardrail slowly elastically deform, and finally tightly compress and break, so that the internal buffer unloading effect is good, and the problem of causing heavy personnel damage is prevented.

[0039] As shown in Figure 1 and Figure 2 , the guardrail is provided with a fixed hole and a transverse pressure relief groove 6 near the end, the fixed holes and the transverse pressure relief grooves of the adjacent guardrail ends coincide and correspond to the installation connecting piece. Among them, the fixed holes of the adjacent guardrails are connected by fixed bolts 8, and the transverse pressure relief grooves 6 of the adjacent guardrails are connected by high-strength connecting bolts 7, and the length extension direction of the transverse pressure relief groove 6 is determined according to the road condition.

[0040] As shown in Figure 2 , the fixed hole is arranged near the end of the guardrail. The guardrail of the embodiment is provided with four fixed holes and four transverse pressure relief grooves at each end, and the four fixed holes are distributed along the vertical direction, and the four transverse pressure relief grooves are also distributed along the vertical direction.

[0041] When the ends of the first guardrail 4 and the second guardrail 5 are connected, the fixed holes on the first guardrail 4 and the second guardrail 5 are aligned and fixedly connected by the fixed bolts 8. The size of the fixed bolt 8 and the fixed hole is matched, and the fixed hole is a threaded hole, so as to ensure the relative position of the two guardrails.

[0042] After the transverse pressure relief grooves 6 of the first guardrail 4 and the second guardrail 5 are aligned, the high-strength connecting bolt 7 is used for connection. The transverse pressure relief groove 6 has a set length, and the high-strength connecting bolt 7 can slide in the transverse pressure relief groove. The high-strength connecting bolt 7 is designed to be at least 2 grades higher in strength than the fixed bolt 8 in principle.

[0043] After the guardrail is hit by a vehicle, the first guardrail 4 and the second guardrail 5 generate a transverse tension. First, the fixed bolt 8 plays a fixing role. Once the tension reaches the ultimate strength value of the fixed bolt 8, the fixed bolt 8 is sheared and broken, and the high-strength connecting bolt 7 can slide along the transverse pressure relief groove 6 (the high-strength connecting bolt 7 is designed to be at least 2 grades higher in strength than the fixed bolt 8 in principle), thereby achieving a buffer unloading effect.

[0044] It can be understood that the length extension direction of the transverse pressure relief groove 6 is determined according to the road condition, and can be changed according to the topographic features of the road section, and can also guide the direction of the guardrail damage, and guide the impact vehicle to drive into the safe area.

[0045] In the embodiment, after the guardrail is suddenly and greatly impacted, the transverse and longitudinal directions are instantaneously retreated to relieve the force and buffer, so as to reduce the rigid impact damage caused by the guardrail and the vehicle, and purposefully guide to the safe direction according to the road condition, so as to ensure that the guardrail can still ensure the protection effect and the function of preventing secondary injury under the condition of deformation relief.

[0046] Embodiment two

[0047] In a typical embodiment of the present application, a mounting method of the highway buffer pressure relief guiding guardrail is used to form the highway buffer pressure relief guiding guardrail in the embodiment one, and specifically includes the following steps:

[0048] The post installation position is measured according to the construction drawing requirement, and the site is leveled.

[0049] ① Lofting: under the responsibility of the engineer, lofting is performed according to the design drawing requirement of the segmental wave-shaped beam guardrail and the construction layout. After the lofting is completed, the site is inspected and confirmed, and after the requirement is met, the subsequent work is performed.

[0050] ② Post piling: after the sample is placed, the post is piled according to the sample line. When the central separation belt is in the excavation section position, the hole is drilled and then the post is piled, so as to avoid the high post. If the post is piled and the high post appears, the post is immediately pulled out by the loader, the high post is abandoned and cannot be used again, and the hole is drilled and treated, so as to pile again.

[0051] ③ Post burying: after the sample is placed, the post pit is excavated according to the sample line. The post 1 is buried.

[0052] ④ Installation of the first guardrail 4 and the second guardrail 5: the on-site engineer leads the installation of the guardrail plate (the first guardrail 4 and the second guardrail 5). The guardrail component should be sequentially installed in the longitudinal buffer pressure relief assembly 2, the inner engagement blocking block 12 is installed first, the high-strength connecting piece 3 is connected and fixed to the post 1, then the outer engagement blocking block 11 is installed, the four connecting screws 10 are respectively threaded through the guardrail and the outer engagement blocking block, and then the high-performance spring 9 is sleeved, then the end of the connecting screw 10 is screwed with the inner engagement blocking block 12, at this time, the spring 9 is located between the two engagement blocking blocks, and the ends of the spring 9 abut against the two engagement blocking blocks. After the longitudinal buffer pressure relief assembly is installed, the correction is performed.

[0053] Then the transverse buffer pressure relief assembly is installed, and the guardrail plate (first guardrail 4 and second guardrail 5) is connected by using four high-strength connecting bolts 7 and four fixing bolts 8, and the above operations are continuously installed, and all the lap joints are spliced in the direction of the vehicle.

[0054] ⑤Guardrail adjustment (first guardrail 4 and second guardrail 5): supervised by engineers, the overall linear adjustment of the guardrail is carried out, the top surface of the corrugated beam should be coordinated with the linear shape of the road, and the adjusted guardrail should be tightened according to the regulations. To achieve the requirements of linear straightness and aesthetics.

[0055] ⑥Self-checking mainly checks the straightness of the guardrail and the completion of the sporadic work. The re-construction of the re-work (with the approval of the supervising engineer) will meet all the sub-item indicators, and the satisfaction of the owner or the supervising engineer.

[0056] It should be noted that the construction of the guardrail post takes into account the specific situation of the actual road section. In view of the current local road subsidence and soil shortage, the detailed size will not be based on the local details during the post construction lofting, but the lofting size will be determined according to the overall longitudinal linear shape of a long section of road. (First use lime to lay out the linear shape, then carry out detailed lofting) to make the installed guardrail achieve a good visual effect. In the process, the guardrail post piling, foundation excavation, post embedding, and guardrail post adjustment are completed at the same time.

[0057] The installation of the guardrail plate is completed at one time after all the posts are installed and adjusted, (if the owner requires, the post installation and guardrail plate installation can be carried out at the same time) and the guardrail adjustment work is completed at the same time. For the concrete pavement guardrail foundation, the whole formwork is used for pouring to ensure that the shoulder wall is not damaged.

[0058] The edge of the excavated part of the asphalt pavement is ensured to be neat and regular. To ensure the smooth progress of the subsequent process, the post installation and adjustment are completed synchronously, and the guardrail plate installation and adjustment are completed synchronously to ensure a good engineering image. In the tail period of construction, the roadside end is uniformly installed, and finally a good visual effect is achieved.

[0059] Technical principle: The longitudinal buffer pressure relief assembly, after the impact of the vehicle hitting the guardrail, the outer bite block 11 and the inner bite block 12 are displaced, the four high-performance springs 9 inside are slowly elastically deformed, and the internal compression damage occurs, which has a good buffer unloading effect, preventing the problem of causing heavy personnel damage.

[0060] When the first guardrail 4 and the second guardrail 5 are subjected to lateral tension after the guardrail is impacted by a vehicle, the first fixing bolt 8 first plays a fixing role. Once the tension reaches the limit strength value of the first fixing bolt 8, the first fixing bolt 8 is subjected to shearing failure, and the high-strength connecting bolt 7 (in principle, the strength is designed to be at least 2 grades higher than that of the first fixing bolt 8) slides along the lateral pressure relief groove 6, thereby playing a buffering and force relief effect. Meanwhile, the position of the buffering groove can also play a role in guiding the direction of guardrail damage and guiding the impact vehicle to drive into a safe zone, thereby further preventing secondary injury.

[0061] The preferred embodiments of the present application are described above, but the present application is not limited to the above. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A highway buffer pressure relief guiding guard, characterized in that, The application relates to a highway buffer pressure relief guide guard rail which comprises a column and a guard rail, the guard rail is connected with the column through a longitudinal buffer pressure relief assembly, the end of the guard rail is provided with a fixing hole and a transverse pressure relief groove, the fixing hole and the transverse pressure relief groove of the end of the adjacent guard rail are coincided and are correspondingly installed with connecting pieces; the longitudinal buffer pressure relief assembly comprises oppositely arranged inner and outer occlusion anti-blocking blocks, the two occlusion anti-blocking blocks are matched through a plurality of connecting screw rods, springs are arranged on the connecting screw rods, the two ends of the springs abut against the occlusion anti-blocking blocks, and the outer occlusion anti-blocking block is fixedly connected with the guard rail through the connecting screw rods. The fixing hole of the adjacent guard rail is connected through a fixing bolt, the transverse pressure relief groove of the adjacent guard rail is connected through a high-strength connecting bolt, and the length extension direction of the transverse pressure relief groove is determined according to road conditions.

2. The expressway buffer pressure relief guide fence according to claim 1, characterized in that, The inner and outer occlusion anti-blocking blocks are both in C-shaped type, the opening of the inner occlusion anti-blocking block is away from the direction of the column, and the inner occlusion anti-blocking block is fixedly connected with the column through a high-strength connecting piece.

3. The expressway buffer pressure relief guide rail according to claim 1, characterized in that, The height of the outer occlusion anti-blocking block is greater than that of the inner occlusion anti-blocking block.

4. The expressway buffer pressure relief guiding protective fence according to claim 2, characterized in that, The connecting screw rods are arranged at the four corners of the occlusion anti-blocking blocks, and the high-strength connecting pieces are arranged between the connecting screw rods.

5. The expressway buffer pressure relief guide rail according to claim 1, wherein, The middle position of the guard rail is connected with the column.

6. A method of installing a highway cushion relief barrier guide fence, characterised by, The application further discloses a highway buffer pressure relief guide guard rail installation method comprising the following steps: The column is piled after lofting, and then the column is buried to form the column; The inner occlusion anti-blocking block is fixedly connected with the column through a high-strength connecting piece, then the connecting screw rod is sleeved with the spring after penetrating through the guard rail and the outer occlusion anti-blocking block, and then the connecting screw rod is connected with the inner occlusion anti-blocking block, so that the connection of the longitudinal buffer pressure relief assembly is completed; The fixing hole and the transverse pressure relief groove of the end of the adjacent guard rail are coincided, the fixing hole is connected through a fixing bolt, the transverse pressure relief groove is connected through a high-strength connecting bolt, the connection between the guard rail and the column and the connection between the adjacent guard rails are continuously carried out until the installation is completed, and the highway buffer pressure relief guide guard rail is obtained.

7. The installation method of the expressway buffer pressure relief guide guardrail according to claim 6, characterized in that, After the sample is placed, the column is piled according to the sample line, the central separation belt is drilled before being piled in the excavation section position to avoid high piles; if the column is piled and high piles appear, the column is immediately pulled out by a loader, the high pile column is abandoned and cannot be used again, and the column can be piled again after being drilled.

8. The installation method of the expressway buffer pressure relief guide guardrail according to claim 6, characterized in that, After the longitudinal buffer pressure relief assembly is installed, correction is carried out; after the adjacent guard rails are spliced, the overall line type of the guard rail is adjusted.

9. The installation method of the expressway buffer pressure relief guide guardrail according to claim 6, characterized in that, The installation of the guard rail is carried out after the installation and adjustment of all the columns are completed.

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