Wave-shaped guardrail structure crossing side ditch and construction method of wave-shaped guardrail structure

Abstract

The invention discloses a corrugated guardrail structure crossing a side ditch and a construction method of the corrugated guardrail structure, and belongs to the technical field of traffic engineering. The wave-shaped guardrail structure crossing the side ditch comprises a cross beam crossing assembly, a standard section wave-shaped guardrail, a guardrail stand column and a concrete foundation. One horizontal end of the cross beam spanning assembly is fixedly connected with the top end of a guardrail stand column vertically fixed on a concrete foundation through a bolt, and the other horizontal end of the cross beam spanning assembly is fixedly connected with a standard section wave-shaped guardrail through a bolt after spanning a side ditch. Through the connecting structure of the guardrail stand column and the cross beam crossing assembly, the guardrail can flexibly adapt to the width, depth and gradient changes of a side ditch; by means of the optimized stand column layout and the reinforced components, the anti-overturning and anti-fracture performance of the guardrail during collision is remarkably improved, and the accident risk is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of traffic engineering technology, specifically to a corrugated guardrail structure spanning a ditch and its construction method. Background Technology

[0002] With the continuous advancement of transportation infrastructure construction in my country, the highway network is constantly extending into areas with complex terrain, significantly increasing the number and complexity of roadside ditches. As the core of the road drainage system, roadside ditches play a crucial role in timely removing water from the road surface and ensuring the stability of the roadbed, while the corrugated guardrails spanning the ditches are a key barrier protecting driving safety.

[0003] However, the widely used traditional corrugated guardrail structure has significant limitations when crossing ditches. Its standardized design is difficult to adapt to the varying widths, depths, and slopes of the ditches, leading to frequent failures such as post overturning and beam breakage during collisions. Furthermore, the ditches are subject to long-term rainwater erosion and vehicle load impacts, causing frequent durability problems with traditional guardrails, increasing maintenance costs and seriously threatening road safety.

[0004] Therefore, conducting research on corrugated guardrail structures that cross ditches has become an urgent need to improve the safety protection level of special road sections and promote the high-quality development of road engineering. Summary of the Invention

[0005] In view of this, the present invention provides a corrugated guardrail structure spanning a ditch and its construction method, providing a brand-new technical solution for ensuring road traffic safety in ditch areas and reducing costs and increasing efficiency in road engineering.

[0006] A corrugated guardrail structure spanning a ditch includes a crossbeam spanning component, a standard section of corrugated guardrail, guardrail posts, and a concrete foundation; One horizontal end of the crossbeam spanning component is bolted to the top of the guardrail post, which is vertically fixed to the concrete foundation. The other horizontal end of the crossbeam spanning component crosses the side ditch and is bolted to the standard section of the corrugated guardrail.

[0007] Furthermore, the crossbeam spanning assembly includes a spanning crossbeam and a reinforcement device; The two ends of the crossbeam are a column anchoring connection section and a guardrail connection section, respectively. The column anchoring connection section is machined with a waist-shaped hole and a round hole, with the waist-shaped hole located directly above the round hole. The guardrail connection section is machined with round holes arranged vertically. One end of the reinforcement device is welded to the crossbeam, and the other end is welded to the guardrail column.

[0008] Furthermore, the crossbeam is made of Q235 square steel, and the reinforcing device is made of angle steel.

[0009] Furthermore, the column is anchored to the foundation through the concrete foundation of the guardrail, and the concrete foundation is reinforced by the steel mesh of the guardrail foundation. The steel mesh is made of HRB300 steel bars with a diameter of 12mm and a spacing of 10mm.

[0010] Furthermore, the concrete foundation dimensions are 500mm × 500mm × 500mm.

[0011] Furthermore, the crossbeam spanning components, standard section corrugated guardrails, and guardrail posts are first galvanized to form the bottom layer of protection, and then the zinc layer surface is phosphated and powder-coated to form the outer layer of barrier.

[0012] Furthermore, the thickness of the zinc plating forming the underlying protective layer is ≥60μm, and the thickness of the powder coating forming the outer barrier is ≥40μm.

[0013] A construction method for a corrugated guardrail structure spanning a ditch, comprising the following steps: Step 1: Layout of posts. Layout of posts is carried out, and the surface condition of the post locations is investigated. The post positions or fixing methods are adjusted in a timely manner according to the condition of the side ditch. At the same time, multiple positioning stakes are set at intervals along the extension direction of the road, and measurement and layout are carried out to ensure the alignment of the road corrugated guardrail foundation. Step 2: Foundation construction. Drill holes according to the measured and laid-out positions. The hole depth should reach the bottom of the cement-stabilized crushed stone base of the road. After the drilling is verified by measurement, clean the top surface of the cement-stabilized crushed stone base and verify the elevation of the top surface of the cement-stabilized crushed stone base. Step 3: Fabricate the steel reinforcement cage, cut and tie the steel reinforcement cage and sink it into the foundation pit, and weld the guardrail posts to the steel reinforcement cage according to the positioning. Step 4: Foundation pouring. Use formwork with appropriate foundation pit size to support the formwork and pour concrete into the foundation pit. Control the concrete unloading speed during pouring to prevent excessive unloading from causing a large impact on the formwork. Use an immersion vibrator to vibrate the concrete. Step 5: Install the ditch crossing components. The crossing beam is made of square steel. One end of the crossing beam is connected to the post on one side of the ditch with high-strength bolts, and the other end is connected to the corrugated guardrail with bolts. One end of the reinforcement device is welded to the crossing beam, and the other end is welded to the post of the ditch. Step Six: Installation of Corrugated Beam Guardrail: The corrugated beam guardrail is spliced ​​to the side ditch crossing components by bolts and fixed to the guardrail posts by bolts. The splicing direction should be consistent with the driving direction. Adjustments should be made continuously during the installation process, and the bolts should be tightened at the end.

[0014] Beneficial effects: 1. In this invention, one horizontal end of the crossbeam spanning component is bolted to the top of the guardrail post, which is vertically fixed to the concrete foundation. The other horizontal end of the crossbeam spanning component crosses the ditch and is bolted to the standard section of the corrugated guardrail. This connection structure breaks with traditional standardized design thinking. By innovating the connection structure between the guardrail post and the crossbeam spanning component, the guardrail post can flexibly adapt to changes in the width, depth, and slope of the ditch. The optimized post layout and reinforced components significantly improve the guardrail post's resistance to overturning and fracture during collisions, effectively reducing the risk of accidents.

[0015] 2. The reinforcement device of the present invention uses angle steel, one end of which is welded to the crossbeam and the other end is welded to the guardrail post, which can further improve the lateral stability of the crossbeam.

[0016] 3. In this invention, the guardrail is reinforced in the concrete foundation by a steel mesh. The steel mesh is made of HRB300 steel bars with a diameter of 12mm and a spacing of 10mm, which can improve the stability of the guardrail in the ditch area.

[0017] 4. In the guardrail components of this invention, each component is first galvanized (≥60μm) to form a base layer of protection, and then powder coated (≥40μm) to form an outer barrier, using double protection to improve the anti-corrosion effect; the zinc layer is first formed by hot-dip galvanizing, and then the surface of the zinc layer is treated (such as phosphating) to enhance the adhesion with the powder coating; then electrostatic powder coating and curing are performed to form a reliable and stable composite coating and an all-round anti-corrosion system, which can not only resist long-term rainwater erosion and vehicle load impact in the ditch area, but also significantly extend the service life of the guardrail, extending the maintenance cycle from the traditional 2-3 years to 8-10 years, greatly reducing road maintenance costs. Attached Figure Description

[0018] Figure 1 This is a construction flowchart of the corrugated guardrail structure spanning the ditch according to the present invention; Figure 2 This is an elevation view of the wave-shaped guardrail structure spanning the ditch according to the present invention; Figure 3 Detailed drawing of the ditch crossing component; Figure 4 This is a side view of the detailed beam; Figure 5 This is the front view of the crossbeam detail; Figure 6 This is a detailed drawing of the bolt 2-1 assembly for the corrugated guardrail. Figure 7 This is a schematic diagram of an example of the wave-shaped guardrail structure spanning the ditch according to the present invention.

[0019] Among them, 1-crossing beam, 1-1-post anchoring connection section, 1-2-guardrail connection section, 2-standard section corrugated guardrail, 2-1-bolt, 3-guardrail post, 4-reinforcement device, 5-concrete foundation, 6-foundation steel mesh, 7-side ditch. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] As attached Figure 2 and 3 As shown, this invention provides a corrugated guardrail structure spanning a ditch, including a crossbeam spanning assembly, a standard section of corrugated guardrail 2, guardrail posts 3, and a concrete foundation 5. The crossbeam spanning assembly includes a spanning crossbeam 1 and a reinforcing device 4. The two ends of the spanning crossbeam 1 are a post anchoring connection section 1-1 and a guardrail connection section 1-2, respectively. The post anchoring connection section 1-1 has a slotted hole and a round hole, with the slotted hole located directly above the round hole.

[0022] The column anchoring connection section 1-1 spanning the crossbeam 1 is connected to the guardrail post 3 by bolts. The round hole on the column anchoring connection section 1-1 is used for installation and fixing, while the oblong hole is used to adjust the angle up and down during installation. The combination of the oblong hole and the round hole facilitates installation. (See attached image) Figure 4 and 5 As shown, the guardrail connecting section 1-2 spanning the crossbeam 1 is symmetrical about the left and right sides of the end face of the crossbeam 1 and extends downwards in the vertical direction. The guardrail connecting section 1-2 has vertically arranged circular holes. The guardrail connecting section 1-2 spanning the crossbeam 1 is connected to the standard section corrugated guardrail by bolts 2-1. The bolt 2-1 has a structure with... Figure 6 The structural form is as follows: One end of the reinforcement device is welded to the crossbeam, and the other end is welded to the guardrail post. The guardrail post 3 is vertically anchored in the foundation through the concrete foundation 5. The concrete foundation 5 has dimensions of 500mm×500mm×500mm. The concrete foundation 5 is reinforced by the guardrail foundation steel mesh 6. The steel mesh is made of HRB300 steel bars with a diameter of 12mm and a spacing of 10mm.

[0023] The effect of the corrugated guardrail structure after installation is shown in the attached figure. Figure 7 As shown, the column anchorage connection section 1-1 spanning the crossbeam 1 is located on one side of the ditch 7, and the guardrail connection section 1-2 spanning the crossbeam 1 is located on the other side of the ditch 7 after crossing the ditch 7.

[0024] The above guardrail components are first galvanized (≥60μm) to form the base layer protection, and then powder coated (≥40μm) to form the outer barrier. The hot-dip galvanizing process is completed first to form a zinc layer; the surface of the zinc layer is treated (such as phosphating) to enhance the adhesion with the powder coating; then electrostatic spraying and curing are carried out to form a composite coating.

[0025] A construction method for a corrugated guardrail structure spanning a ditch, comprising the following steps: Step 1: Layout of posts. Layout of posts is carried out, and the surface condition of the post locations is investigated. The post positions or fixing methods are adjusted in a timely manner according to the condition of the side ditch. At the same time, multiple positioning stakes are set at intervals along the extension direction of the road, and measurement and layout are carried out to ensure the alignment of the road corrugated guardrail foundation. Step 2: Foundation construction. Drill holes according to the measured and laid-out positions. The hole depth should reach the bottom of the cement-stabilized crushed stone base of the road. After the drilling is verified by measurement, clean the top surface of the cement-stabilized crushed stone base and verify the elevation of the top surface of the cement-stabilized crushed stone base. Step 3: Fabricate the steel reinforcement cage, cut and tie the steel reinforcement cage and sink it into the foundation pit, and weld the guardrail post 3 to the steel reinforcement cage according to the positioning. Step 4: Foundation pouring. Use formwork with appropriate foundation pit size to support the formwork and pour concrete into the foundation pit. Control the concrete unloading speed during pouring to prevent excessive unloading from causing a large impact on the formwork. Use an immersion vibrator to vibrate the concrete. Step 5: Installation of the ditch crossing components. The crossing beam 1 is made of square steel. One end of the crossing beam is connected to the post on one side of the ditch 7 by bolts, and the other end is connected to the corrugated guardrail by bolts 2-1. One end of the reinforcement device 4 is welded to the crossing beam 1, and the other end is welded to the post 3 of the ditch. Step Six: Installation of Corrugated Guardrail 2: Corrugated guardrail 2 is spliced ​​to the side ditch crossing component by bolts 2-1 and fixed to the guardrail post 3 by bolts. The splicing direction should be consistent with the driving direction. Adjustments are made continuously during the installation process, and finally bolts 2-1 are tightened.

[0026] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wavy barrier structure spanning a ditch, characterized in that The application relates to a beam spanning assembly, a standard segmental wave-shaped guardrail, a guardrail post and a concrete foundation. One end of the horizontal beam spanning assembly is fixedly connected to the top end of the guardrail post vertically fixed on the concrete foundation through bolts, and the other end of the horizontal beam spanning assembly is fixedly connected to the standard segmental wave-shaped guardrail through bolts.

2. The wavy barrier structure spanning a ditch of claim 1, wherein, The beam spanning assembly comprises a spanning beam and a reinforcing device. The two ends of the spanning beam are respectively a post anchoring connecting segment and a guardrail connecting segment, the post anchoring connecting segment is provided with a waist-shaped hole and a round hole, the waist-shaped hole is located directly above the round hole, the guardrail connecting segment is provided with round holes arranged in an up-down mode, one end of the reinforcing device is welded to the spanning beam, and the other end is welded to the guardrail post.

3. The wavy barrier structure spanning a ditch of claim 2, wherein, The spanning beam is made of Q235 square steel, and the reinforcing device is made of angle steel.

4. The wavy barrier structure spanning a ditch of claim 3, wherein, The post is anchored in the foundation through the guardrail concrete foundation, and the concrete foundation is reinforced through a guardrail foundation steel mesh, the steel mesh is composed of HRB300 steel rods with a diameter of 12 mm, and the steel rods are spaced apart by 10 mm.

5. The wavy barrier structure spanning a ditch of claim 4, wherein, The concrete foundation has a size of 500mm*500mm*500mm.

6. The wavy barrier structure spanning a ditch as defined by claim 5, wherein, The beam spanning assembly, the standard segmental wave-shaped guardrail and the guardrail post are first galvanized to form a bottom layer of protection, then the surface of the zinc layer is phosphorized, and then the phosphorized surface is sprayed with plastic to form an outer layer of protection.

7. The wavy barrier structure spanning a ditch of claim 6, wherein, The thickness of the bottom layer of protection formed by galvanizing is greater than or equal to 60 microns, and the thickness of the outer layer of protection formed by spraying plastic is greater than or equal to 40 microns.

8. The wavy barrier structure spanning a ditch according to any one of claims 1-7, characterized in that The construction steps of the wave-shaped guardrail structure are as follows: Step one: post lofting, post lofting is carried out, and the ground state of the post position is investigated, the post position or fixing mode is adjusted in time according to the situation of the ditch, and multiple positioning stakes are arranged along the extension direction of the road and are measured and lofted to ensure the line shape of the road wave-shaped guardrail foundation; Step two: foundation construction, drilling is carried out according to the position of the measurement and lofting, the hole depth of the drilling needs to reach the bottom of the cement stabilized macadam base of the road, after the drilling is measured and reviewed, the top surface of the cement stabilized macadam base is cleaned, and the top surface elevation of the cement stabilized macadam base is reviewed; Step three: reinforcing cage production, the reinforcing cage is cut and bound and is sunk into the foundation pit, and the guardrail post is welded and positioned according to the positioning and the reinforcing cage; Step four: foundation pouring, a formwork is used for supporting the foundation pit with a suitable size, and the foundation pit is poured with concrete, the concrete unloading speed is controlled during pouring to prevent the unloading from being too fast to have a great impact on the formwork, and a plug-in type vibrating rod is used for vibrating the concrete; Step five: ditch spanning assembly installation, the spanning beam is made of square steel, one section of the spanning beam is connected to the post on one side of the ditch through high-strength bolts, and the other section is connected to the wave-shaped guardrail through bolts; one end of the reinforcing device is welded to the spanning beam, and the other end is welded to the ditch post; Step six: wave-shaped guardrail installation: the wave-shaped guardrail is spliced with the ditch spanning assembly through bolts and is fixed on the guardrail post through bolts, the splicing direction should be consistent with the driving direction, the bolts are tightened after continuous adjustment during the installation process.

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