A flexible central guardrail and its construction method

Abstract

The present invention relates to a flexible central guardrail and its construction method; longitudinal docking connectors provided on two longitudinal support channel plates are connected by bolts, the inner sides of the tops of the two longitudinal support channel plates are connected by bolts to a top cover plate frame, a cover plate is fixedly installed on the top surface of the top cover plate frame, transverse strengthening connection holes are formed in the longitudinal support channel plates, for the transverse strengthening connection holes, protective part fixing pins are sleeved in the symmetrically arranged transverse strengthening connection holes on the two longitudinal support channel plates, both ends of the protective part are provided with protective part connection holes matching the transverse strengthening connection holes, and the protective part is installed on the side surface of the longitudinal support channel plate through the protective part fixing pins and the protective part connection holes; after the overall bottom base support and fixing assembly is installed, its top surface is on the same horizontal plane as the top surface of the road base, without occupying too much road surface space, facilitating the layout of the central isolation area of the road, and at the same time, when rain or snow weather occurs, the phenomenon of water blocking at the bottom of the traditional guardrail will not occur.

Description

Technical Field

[0001] The present invention relates to the field of manufacturing reinforced concrete precast frame concrete structural components, and particularly relates to a flexible central guardrail and a construction method thereof. Background Art

[0002] According to relevant data statistics, highway accidents occur frequently, and accidents related to the central median guardrail account for about one-third. There are many situations where accident vehicles break through the central median guardrail, which is likely to cause serious secondary accident injuries to oncoming traffic. Improving the protection ability of the central median guardrail on highways is one of the important measures to ensure road traffic safety. There are mainly two types of existing median guardrails on highways. One is the corrugated board guardrail, and the other is the New Jersey guardrail. Both guardrails have some deficiencies in actual protection. Among them, the corrugated board guardrail has poor anti-penetration ability, and vehicles are easy to penetrate the guardrail, causing secondary injuries; the New Jersey guardrail is rigid, but has poor impact buffering ability, which is easy to cause injuries to the vehicle occupants. Moreover, in sections with heavy snowfall, it is easy to accumulate snow, posing a safety hazard. Although some comprehensive guardrails have emerged on the market currently, their bases generally adopt a concrete structure, and a guardrail body made of steel structure is provided on the top of the concrete structure body. This kind of guardrail with a concrete structure at the bottom and a steel structure at the top still has certain defects in specific use. When installed, it causes excessive installation space occupation at the bottom, resulting in road narrowing, and at the same time, it is easy to cause waste of resources and increase in consumables. At the same time, during the operation of the protection operation, there are still defects such as poor impact buffering ability at the bottom and poor anti-penetration ability at the top.

[0003] In summary, the present invention provides a flexible central guardrail and a construction method thereof, which have a simple structure, are easy to operate, can avoid the defects of poor impact buffering ability and poor penetration ability of traditional guardrails, can save installation space and resources, can be recycled, are convenient for assembly and installation, provide a flexible protection effect, can reduce the instantaneous buffering force, reduce the damage degree of vehicles hitting the guardrail, are suitable for sections with a large number of large vehicles, have a low maintenance cost, do not block snow, have a wide range of applications, have the buffering effect of a flexible guardrail, can effectively reduce the occurrence of collision accidents, and the construction method is simple and easy to operate, and has a broad market prospect. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a flexible central guardrail with a simple structure, convenient operation, which can avoid the defects of poor impact buffering ability and poor penetration ability of traditional guardrails. At the same time, it can save installation space, save resources, can be recycled, is convenient for assembly and installation, provides a flexible protection effect, can reduce the instantaneous buffering force, reduce the damage degree of the vehicle hitting the guardrail, is suitable for sections with a large number of large vehicles, has a low maintenance cost, does not block snow, has a wide range of applications, has the buffering effect of a flexible guardrail, can effectively reduce the occurrence of collision accidents, and a construction method thereof which is simple and easy to operate, so as to overcome the defects in the prior art.

[0005] The technical solution of the present invention is realized as follows: A flexible central guardrail includes a plurality of reinforced concrete bases embedded in the road surface base layer. The reinforced concrete bases are stepped block structures with gradually narrowing bottoms and symmetric sides. A backfill soil layer is filled between two adjacent reinforced concrete bases. The top of each reinforced concrete base is installed with a support base device through embedded bolts, and a protective member is movably installed on the outer side between two adjacent support base devices.

[0006] The support base device includes a bottom connection seat connected to the embedded bolt. A bolt hole for sleeving the embedded bolt is provided on the bottom connection seat. The outer edge of the top of the bottom connection seat is fixedly installed with a base longitudinal connection frame. Two symmetrically arranged longitudinal support channel plates are installed on the outside of the base longitudinal connection frame through bolts. Longitudinal docking connection pieces are arranged at the two side edge positions of the longitudinal support channel plates. The longitudinal docking connection pieces arranged on the two longitudinal support channel plates are connected through bolts. The inner sides of the tops of the two longitudinal support channel plates are connected through bolts with a top cover plate frame. A cover plate is fixedly installed on the top surface of the top cover plate frame. Transverse strengthening connection holes are provided on the longitudinal support channel plates. Protective member fixing pins are sleeved in the symmetrically arranged transverse strengthening connection holes on the two longitudinal support channel plates. Protective member connection holes matched with the transverse strengthening connection holes are provided at both ends of the protective member. The protective member is installed on the side of the longitudinal support channel plate through the protective member fixing pins and the protective member connection holes.

[0007] A foundation stone layer is provided between the road surface base layer, the reinforced concrete bases and the backfill soil layer. The top surface of the road surface base layer, the reinforced concrete bases and the backfill soil layer are on the same horizontal plane.

[0008] A shaping steel mold is arranged in the reinforced concrete base. The shaping steel mold is a stepped sheet structure with gradually narrowing bottoms and symmetric sides.

[0009] The protective member is a long rectangular tube, an M-shaped corrugated plate, a double-wave corrugated plate or a triple-wave corrugated plate. The embedded bolt is a rod-shaped structure with a vertical or bent bottom and a vertical upper part.

[0010] An external thread layer is provided on the outer side of the top of the embedded bolt. A fastening nut is fitted outside the external thread layer. The fastening nut is movably arranged outside the bolt hole on the upper part of the bottom connecting seat. The bottom connecting seat is fixedly installed at the central position on the top of the reinforced concrete base through the embedded bolt and the fastening nut. The bottom connecting seat is a square, rectangular, hexagonal plate-shaped structure with a rectangle in the middle and symmetric obtuse triangles on both sides, or a hexagonal plate-shaped structure with a square in the middle and symmetric obtuse triangles on both sides. The bottom of the longitudinal connecting frame of the base is an integral structure with the outer edge of the top of the bottom connecting seat. The longitudinal connecting frame of the base is a square, rectangular, hexagonal frame structure with a rectangle in the middle and symmetric obtuse triangles on both sides, or a hexagonal frame structure with a square in the middle and symmetric obtuse triangles on both sides. The inner wall of the bottom of the longitudinal support groove plate coincides with half of the outer wall of the longitudinal connecting frame of the base. After the two longitudinal support groove plates are butted, the inner wall of their bottom coincides with the outer wall of the longitudinal connecting frame of the base. A base longitudinal connecting frame bolt hole and a longitudinal support groove plate bottom bolt hole that correspond and coincide with each other are respectively provided on the side wall of the longitudinal connecting frame of the base and the bottom side wall of the longitudinal support groove plate. Bolts are installed in the base longitudinal connecting frame bolt hole and the longitudinal support groove plate bottom bolt hole.

[0011] The longitudinal docking connecting piece is a rectangular sheet-like structure. The longitudinal docking connecting piece and the longitudinal support groove plate are an integral structure. The height of the longitudinal support groove plate is equal to the length of the longitudinal docking connecting piece. The top cover frame is a square, rectangular, hexagonal frame structure with a rectangle in the middle and symmetric obtuse triangles on both sides, or a hexagonal frame structure with a square in the middle and symmetric obtuse triangles on both sides. The top of the top cover frame is an integral structure with the bottom of the cover plate. The cover plate is a square, rectangular, hexagonal plate-shaped structure with a rectangle in the middle and symmetric obtuse triangles on both sides, or a hexagonal plate-shaped structure with a square in the middle and symmetric obtuse triangles on both sides. The shape and size of the cover plate are both equal to those of the bottom connecting seat. The shape and size of the top cover frame and the longitudinal connecting frame of the base are both equal. The inner wall of the bottom of the longitudinal support groove plate coincides with half of the outer wall of the top cover frame. After the two longitudinal support groove plates are butted, the inner wall of their bottom coincides with the outer wall of the top cover frame. A top cover bolt hole and a longitudinal support groove plate top bolt hole that correspond and coincide with each other are respectively provided on the side wall of the top cover frame and the top side wall of the longitudinal support groove plate. Bolts are installed in the top cover bolt hole and the longitudinal support groove plate top bolt hole.

[0012] The described lateral strengthening connection holes are circular through-holes. On each longitudinal support groove plate, at least four groups of strengthening connection holes are arranged in pairs, and the four groups of strengthening connection holes are distributed in a rectangular array at the central position of the longitudinal support groove plate. The length from the midline of the two upper groups of strengthening connection holes to the top of the longitudinal support groove plate is equal to the length from the midline of the two lower groups of strengthening connection holes to the bottom of the longitudinal support groove plate. The length between the midlines of the two upper groups of strengthening connection holes and the midlines of the two lower groups of strengthening connection holes is equal to the length from the midline of the two upper groups of strengthening connection holes to the top of the longitudinal support groove plate.

[0013] The length of the described protective part fixing pin is twice the thickness of the longitudinal support groove plate. The length between the inner walls after the combination of the two longitudinal support groove plates is not greater than the length of the protective part fixing pin. A limit fastening block is fixedly installed on one side of the protective part fixing pin, and a protective part limit fixing nut is installed at the end of the other side of the protective part fixing pin through threads. Protective installation holes matching the strengthening connection holes are provided at both ends of the protective part. The limit fastening block is arranged outside the protective installation hole of the protective part on one side of the longitudinal support groove plate, and the limit fastening block is arranged outside the protective installation hole of the protective part on the other side of the longitudinal support groove plate.

[0014] A construction method of a flexible central guardrail as described above, and its construction and installation method is as follows:

[0015] Step 1: Reserve a reinforced concrete base installation groove in the middle of the road surface base layer, and excavate a bottom drainage pipe gallery groove at the bottom of the reinforced concrete base installation groove. The bottom drainage pipe gallery groove is an isosceles trapezoidal structure with a larger upper cross-section and a smaller lower cross-section. Excavate a water infiltration groove at the bottom of the bottom drainage pipe gallery groove, embed a drainage pipe and fill a sand and gravel layer in the water infiltration groove, and then install an underground line pipe gallery on the bottom surface of the bottom drainage pipe gallery groove. The top of the underground line pipe gallery is on the same horizontal plane as the top of the bottom drainage pipe gallery groove, and then backfill the bottom drainage pipe gallery groove;

[0016] Step 2: The reinforced concrete base installation groove is a stepped groove structure with a gradually shrinking bottom and symmetric sides on both sides. The inner wall of the reinforced concrete base installation groove fits the outer wall of the reinforced concrete base. Install two pieces of shaped steel molds into the reinforced concrete base installation groove according to a preset spacing, and pour concrete between the two pieces of shaped steel molds. Cure the concrete as soon as possible after the surface has been tamped, cover it with geotextile, and remove the molds when it reaches 80% of the designed strength;

[0017] Step 3: After the reinforced concrete base is made, backfill the soil layer between the two reinforced concrete bases, and control the backfill to be flush with the top surface of the reinforced concrete base;

[0018] Step 4: After the backfill soil layer is backfilled, the embedded bolts are installed at the preset position on the top of the reinforced concrete base. The embedded bolts are installed to the corresponding preset positions by drilling holes or pre-embedding. Then, the bottom connecting seat is mounted on the embedded bolts, and the embedded bolts are inserted into the bolt holes. The bottom connecting seat is fixed to the top of the reinforced concrete base by using a fastening nut at the top of the bottom connecting seat.

[0019] Step 5: Use bolts to fix the bottom of the two longitudinal support slots to the outer wall of the base longitudinal connecting frame, and then install the top cover frame and the cover plate on the top of the two longitudinal support slots by bolts. The top surface of the cover plate is provided with a handle. After the installation is completed, install the bolts in the longitudinal butt connection holes provided on the two longitudinal butt connection plates and tighten them;

[0020] Step six: Finally, align the protective mounting holes opened at both ends of the protective part with the reinforced connecting holes respectively, and insert the protective part fixing pins into the protective mounting holes and the reinforced connecting holes. The limiting fastening block is reserved on the outside of the protective mounting hole set on the protective part on one side of the longitudinal support slot plate. The other end of the protective part fixing pin passes through the longitudinal support slot plate to the other side, and the protective part limiting fixing nut is installed at the end of the part where the protective part fixing pin passes through. After the installation is completed, the protective part limiting fixing nut is located on the outside of the protective mounting hole set on the protective part on the other side of the longitudinal support slot plate.

[0021] The present invention has the following positive effects:

[0022] Firstly, the present invention utilizes a supporting base device to install the protective part, and realizes the installation of the bottom sunken foundation component through a reinforced concrete base. When installing the bottom sunken foundation support component, the layout of the power supply line and the drainage operation are pre-set. After the overall bottom foundation support fixing assembly is installed, its top surface is on the same horizontal plane as the top surface of the pavement base layer, and will not occupy too much pavement space, facilitating the layout of the isolation area in the middle of the road. At the same time, when rainy and snowy weather occurs, the water blocking phenomenon at the bottom of the traditional guardrail will not occur.

[0023] Secondly, the support base device of the present invention is installed in an assembly manner, and the components adopt a unified prefabricated structure, which can be installed and used in a turnover manner. At the same time, the prefabricated components are convenient for transportation and installation. The overall assembly and disassembly operations are flexible and convenient, which is convenient for on-site installation. Bolt holes are reserved for matching with on-site embedded bolts. After installation, the support base device can be stably connected to the reinforced concrete base. The specific number of embedded bolts to be installed is added and set according to the road protection level, which is flexible and convenient as a whole.

[0024] Again, after the protective part of the present invention is connected to the longitudinal support groove plate, the bottom connection seat at the bottom of the longitudinal support groove plate is used to achieve longitudinal fixation. At the same time, the protective part is used as a lateral protection, realizing a stable connection with the bottom reinforced concrete foundation in the longitudinal direction. In the lateral direction, the road is isolated and protected by the protective part. When an impact occurs, it can buffer the impact through the way of lateral energy dissipation and longitudinal support, and at the same time can effectively prevent the impact from passing through, achieving the effect of flexible protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional structural schematic diagram of the support base device of the present invention.

[0026] Figure 2 is a schematic diagram of the internal structure of the support base device of the present invention.

[0027] Figure 3 is a schematic diagram of the fixing pin structure of the protective part of the present invention.

[0028] Figure 4 is a three-dimensional structural schematic diagram of the support base device of the present invention after installing the protective part.

[0029] Figure 5 is a schematic diagram of the connection structure between the support base device of the present invention and the reinforced concrete foundation.

[0030] Figure 6 is a schematic diagram of the cross-sectional structure of the installation groove of the reinforced concrete foundation of the present invention.

[0031] Figure 7 is one of the schematic diagrams of the construction steps of the present invention.

[0032] Figure 8 is the second of the schematic diagrams of the construction steps of the present invention.

[0033] Figure 9 is an extended connection schematic diagram of different protective parts and the support base device of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0034] Such as Figure 1 、 2As shown in Figures 3, 4, 5, 6, 7, and 8, a flexible central guardrail includes a number of reinforced concrete bases 18 embedded in the road surface base layer 20. The reinforced concrete bases 18 are stepped block structures with gradually narrowing bottoms and symmetrical sides. A backfill soil layer 19 is filled between two adjacent reinforced concrete bases 18. The top of each reinforced concrete base 18 is installed with a support base device through embedded bolts 9. A protective member 17 is movably installed on the outer side between two adjacent support base devices. The support base device includes a bottom connection seat 11 connected to the embedded bolt 9. A bolt hole 28 for sleeving the embedded bolt 9 is provided on the bottom connection seat 11. The outer edge of the top of the bottom connection seat 11 is fixedly installed with a base longitudinal connection frame 12. Two symmetrically arranged longitudinal support channel plates 1 are installed on the outside of the base longitudinal connection frame 12 through bolts. Longitudinal docking connection pieces 7 are arranged at the two side edges of the longitudinal support channel plates 1. The longitudinal docking connection pieces 7 provided on the two longitudinal support channel plates 1 are connected through bolts. The inner sides of the tops of the two longitudinal support channel plates 1 are connected through bolts with a top cover plate frame 10. A cover plate 5 is fixedly installed on the top surface of the top cover plate frame 10. A transverse strengthening connection hole 2 is provided on the longitudinal support channel plate 1. Protective member fixing pins 14 are sleeved in the symmetrically arranged transverse strengthening connection holes 2 on the two longitudinal support channel plates 1. Connection holes of the protective member are provided at both ends of the protective member 17 and are matched with the transverse strengthening connection holes 2. The protective member 17 is installed on the side surface of the longitudinal support channel plate 1 through the protective member fixing pins 14 and the connection holes of the protective member.

[0035] A foundation stone layer 26 is provided between the road surface base course 20, the reinforced concrete pedestal 18 and the backfill soil layer 19. The top surfaces of the road surface base course 20, the reinforced concrete pedestal 18 and the backfill soil layer 19 are on the same horizontal plane. A shaped rigid mold 27 is arranged in the reinforced concrete pedestal 18. The shaped rigid mold 27 is a stepped sheet-like structure with a gradually shrinking bottom and symmetric sides on both sides. An external thread layer is provided on the outer side of the top of the embedded bolt 9. A fastening nut is fitted outside the external thread layer. The fastening nut is movably arranged outside the bolt hole 28 on the upper part of the bottom connecting seat 11. The bottom connecting seat 11 is fixedly installed at the center of the top of the reinforced concrete pedestal 18 through the embedded bolt 9 and the fastening nut. The bottom connecting seat 11 is a square, a rectangle, a hexagon with a rectangle in the middle and symmetric obtuse triangles on both sides, or a hexagon with a square in the middle and symmetric obtuse triangles on both sides in a plate-like structure. The bottom of the base longitudinal connecting frame 12 and the outer edge of the top of the bottom connecting seat 11 are of an integral structure. The base longitudinal connecting frame 12 is a square, a rectangle, a hexagon with a rectangle in the middle and symmetric obtuse triangles on both sides, or a hexagon with a square in the middle and symmetric obtuse triangles on both sides in a frame structure. The inner wall of the bottom of the longitudinal support channel plate 1 coincides with half of the outer wall of the base longitudinal connecting frame 12. After the two longitudinal support channel plates 1 are butted, the inner wall of the bottom coincides with the outer wall of the base longitudinal connecting frame 12. A base longitudinal connecting frame bolt hole 13 and a longitudinal support channel plate bottom bolt hole 4 which correspond and coincide with each other are respectively formed in the side wall of the base longitudinal connecting frame 12 and the bottom side wall of the longitudinal support channel plate 1. Bolts are installed in the base longitudinal connecting frame bolt hole 13 and the longitudinal support channel plate bottom bolt hole 4.

[0036] The longitudinal docking connection piece 7 is a rectangular sheet structure. The longitudinal docking connection piece 7 and the longitudinal support groove plate 1 are of an integral structure. The height of the longitudinal support groove plate 1 is equal to the length of the longitudinal docking connection piece 7. The top cover frame 10 is a hexagonal frame structure in the shape of a square, a rectangle, a rectangle in the middle with symmetric obtuse triangles on both sides, or a square in the middle with symmetric obtuse triangles on both sides. The top of the top cover frame 10 and the bottom of the cover plate 5 are of an integral structure. The cover plate 5 is a plate-like structure in the shape of a square, a rectangle, a rectangle in the middle with symmetric obtuse triangles on both sides, or a square in the middle with symmetric obtuse triangles on both sides. The shape and size of the cover plate 5 are equal to those of the bottom connection seat 11. The shapes and sizes of the top cover frame 10 and the base longitudinal connection frame 12 are equal. The inner wall of the bottom of the longitudinal support groove plate 1 coincides with half of the outer wall of the top cover frame 10. After the two longitudinal support groove plates 1 are docked, the inner wall of the bottom coincides with the outer wall of the top cover frame 10. Corresponding and coinciding top cover bolt holes 29 and longitudinal support groove plate top bolt holes 3 are respectively provided on the side wall of the top cover frame 10 and the top side wall of the longitudinal support groove plate 1. Bolts are installed in the top cover bolt holes 29 and the longitudinal support groove plate top bolt holes 3.

[0037] The described transverse strengthening connection holes 2 are circular through holes. On each longitudinal support groove plate 1, at least four groups of strengthening connection holes 2 are arranged in pairs. The four groups of strengthening connection holes 2 are distributed in a rectangular array at the central position of the longitudinal support groove plate 1. The length from the midline of the upper two groups of strengthening connection holes 2 to the top of the longitudinal support groove plate 1 is equal to the length from the midline of the lower two groups of strengthening connection holes 2 to the bottom of the longitudinal support groove plate 1. The length between the midlines of the upper two groups of strengthening connection holes 2 and the midlines of the lower two groups of strengthening connection holes 2 is equal to the length from the midline of the upper two groups of strengthening connection holes 2 to the top of the longitudinal support groove plate 1. The length of the protective part fixing pin 14 is twice the thickness of the longitudinal support groove plate 1. The length between the inner walls after the two longitudinal support groove plates 1 are combined is not greater than the length of the protective part fixing pin 14. A limit fastening block 15 is fixedly installed on one side of the protective part fixing pin 14. The other end of the protective part fixing pin 14 is threadedly installed with a protective part limit fixing nut 16. Protective installation holes matching the strengthening connection holes 2 are respectively provided at both ends of the protective part 17. The limit fastening block 15 is arranged outside the protective installation hole of the protective part 17 on one side of the longitudinal support groove plate 1, and the limit fastening block 15 is arranged outside the protective installation hole of the protective part 17 on the other side of the longitudinal support groove plate 1.

[0038] When the present invention is in use, the top surface of the road base course 20, the top surface of the reinforced concrete base 18 and the top surface of the backfill soil layer 19 are on the same plane. After the installation of the reinforced concrete base 18, the top plane is consistent with the top surface of the road. Surface hardening operation is carried out between the two roads on its upper part. After the installation of the protective member, the lower part of the protective member 17 between the two longitudinal support channel plates is of an open structure, and water accumulation or water blocking will not occur during rainy or snowy weather. At the bottom of the installation groove 25 of the reinforced concrete base of the present invention, a bottom drainage pipe gallery groove 21, a seepage excavation groove 23, a buried drainage pipe 24 and a sand and gravel layer are provided to ensure that water accumulation will not occur.

[0039] The protective member 17 is installed on two adjacent longitudinal support channel plates 1. The protective member 17 is provided with at least two layers, and can be provided with three layers if necessary, and is evenly arranged between two adjacent longitudinal support channel plates 1 from top to bottom. Each layer of the protective member 17 can adopt the same type of protective material, and can also adopt different protective materials. The protective member 17 is a long rectangular pipe, an M-shaped corrugated plate, a double-wave corrugated plate or a triple-wave corrugated plate. The embedded bolt 9 is a rod-shaped structure with a vertical or bent bottom and a vertical upper part. As Figure 9 shown, during the specific installation operation, one of the long rectangular pipe, the M-shaped corrugated plate, the double-wave corrugated plate or the triple-wave corrugated plate can be adopted for the upper two layers, and a protective plate or a protective pipe with a different shape from the upper part can be adopted for the bottom.

[0040] The side surface of the base longitudinal connecting frame 12 is provided with a base longitudinal connecting frame bolt hole 13, and the bottom side surface of the longitudinal support channel plate 1 is provided with a longitudinal support channel plate bottom bolt hole 4. The longitudinal support channel plate bottom bolt hole 4 and the base longitudinal connecting frame bolt hole 13 cooperate with each other to fixedly install the bottom of the longitudinal support channel plate 1 with the bottom connecting seat 11, forming a stable support structure at the bottom for coping with the bottom support during impact, and at the same time for supporting the longitudinal support channel plate 1 and the protective member 17. When an impact occurs, the fixedly installed protective member 17 generates energy consumption and bending strain. The bottom connecting seat 11 at the bottom plays a role in blocking the impact and preventing the vehicle from crossing to the oncoming road. Flexible protection is achieved through the way of bottom support blocking and upper bending strain, which can reduce the instantaneous buffer force and reduce the damage degree of the vehicle hitting the guardrail.

[0041] At the same time, the installation of the protective member fixing pin 14 of the present invention and the installation of the protective member 17 are in a horizontal and vertical cross-installation state. When an impact operation occurs, both ends of the protective member 17 are stressed, and at the same time, bending deformation occurs in the middle. During this process, a support and protection effect is formed between the protective member fixing pin 14 and the protective member 17. No matter which side of the road the protective member 17 is hit, the impact force will conduct the impact force to the outer surface, bottom and the internally installed protective member fixing pin 14 of the longitudinal support channel plate 1 while the protective member 17 consumes energy and bends. Through the simultaneous energy consumption of these components, the damage caused by the impact is reduced.

[0042] During the specific construction and installation of the present invention, first, a reinforced concrete base installation groove 25 is reserved in the middle of the road surface base 20, and a bottom drainage pipe gallery groove 21 is excavated at the bottom of the reinforced concrete base installation groove 25. The bottom drainage pipe gallery groove 21 is an isosceles trapezoidal structure with a larger upper cross-section and a smaller lower cross-section. A seepage groove 23 is excavated at the bottom of the bottom drainage pipe gallery groove 21, and a drainage pipe 24 and a sand and gravel layer are embedded in the seepage groove 23. Then, an underground line pipe gallery 22 is installed on the bottom surface of the bottom drainage pipe gallery groove 21. The top of the underground line pipe gallery 22 is on the same horizontal plane as the top of the bottom drainage pipe gallery groove 21. Then, the bottom drainage pipe gallery groove 21 is backfilled.

[0043] The reinforced concrete base installation groove 25 is a stepped groove structure with a gradually shrinking bottom and symmetric sides on both sides. The inner wall of the reinforced concrete base installation groove 25 coincides with the outer wall of the reinforced concrete base 18. Two pieces of shaped steel molds 27 are installed in the reinforced concrete base installation groove 25 at a preset spacing, and concrete is poured between the two pieces of shaped steel molds 27. After the surface slurry has set, the concrete is cured as soon as possible and covered with geotextile. When the designed strength reaches 80%, the formwork is removed. After the reinforced concrete base 18 is manufactured, the backfill soil layer 19 between the two reinforced concrete bases 18 is backfilled, and the backfill of the backfill soil layer 19 is controlled to be flush with the top surface of the reinforced concrete base 18. When the backfill of the backfill soil layer 19 is completed, embedded bolts 9 are installed at preset positions on the top of the reinforced concrete base 18. The embedded bolts 9 are installed at the corresponding preset positions by means of drilling and embedding or pre-embedding in advance. Then, the bottom connecting seat 11 is sleeved onto the embedded bolts 9, the embedded bolts 9 are inserted into the bolt holes 28, and the bottom connecting seat 11 is fixedly installed on the top of the reinforced concrete base 18 by using fastening nuts on the top of the bottom connecting seat 11.

[0044] The bottom of two longitudinal support channel plates 1 is fixedly connected to the outer wall of the base longitudinal connecting frame 12 by bolts. Then, a top cover frame 10 and a cover plate 5 are installed on the top of the two longitudinal support channel plates 1 by bolts. A handle 6 is provided on the top surface of the cover plate 5. After installation, bolts are installed and tightened in the longitudinal docking connection holes 8 provided on the two longitudinal docking connection pieces 7. Finally, the protection installation holes provided at both ends of the protection member 17 are respectively aligned with the strengthening connection holes 2, and the protection member fixing pin 14 is inserted into the protection installation holes and the strengthening connection holes 2. The limit fastening block 15 is reserved outside the protection installation holes provided on the protection member 17 on one side of the longitudinal support channel plate 1. The other end of the protection member fixing pin 14 passes through the longitudinal support channel plate 1 to the other side, and the protection member limit fixing nut 16 is installed at the end of the part of the protection member fixing pin 14 that passes through. After installation, the protection member limit fixing nut 16 is located outside the protection installation holes provided on the protection member 17 on the other side of the longitudinal support channel plate 1.

[0045] As another embodiment of the present invention, when the road safety protection level is relatively high, the inner cavity of the longitudinal support channel plate 1 can be filled with concrete, and the bottom of the poured concrete is integrated with the top of the reinforced concrete base. Or directly use a concrete base with the same external structure as the support base device to replace it, and use embedded bolts 9 to connect the reinforced concrete base and the concrete base under the replaced concrete base to achieve stable and high-strength connection operations.

[0046] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible central guardrail, comprising a plurality of reinforced concrete bases (18) embedded in a road surface base layer (20), characterized in that: The described reinforced concrete pedestal (18) is a stepped block structure with a gradually narrowing bottom and symmetrical sides. A backfill soil layer (19) is filled between two adjacent reinforced concrete pedestals (18). The top of each reinforced concrete pedestal (18) is installed with a support pedestal device through embedded bolts (9). A protective member (17) is movably installed on the outer side between two adjacent support pedestal devices; the support pedestal device includes a bottom connection seat (11) connected to the embedded bolt (9). A bolt hole (28) for sleeving the embedded bolt (9) is provided on the bottom connection seat (11). The outer edge of the top of the bottom connection seat (11) is fixedly installed with a base longitudinal connection frame (12). Two symmetrically arranged longitudinal support channel plates (1) are installed on the outside of the base longitudinal connection frame (12) through bolts. Longitudinal docking connection pieces (7) are arranged at the two side edge positions of the longitudinal support channel plates (1). The longitudinal docking connection pieces (7) provided on the two longitudinal support channel plates (1) are connected through bolts. The inner sides of the tops of the two longitudinal support channel plates (1) are connected through bolts with a top cover plate frame (10). A cover plate (5) is fixedly installed on the top surface of the top cover plate frame (10). A transverse strengthening connection hole (2) is provided on the longitudinal support channel plate (1). Protective member fixing pins (14) are sleeved in the symmetrically arranged transverse strengthening connection holes (2) on the two longitudinal support channel plates (1). Protective member connection holes matching the transverse strengthening connection holes (2) are provided at both ends of the protective member (17). The protective member (17) is installed on the side surface of the longitudinal support channel plate (1) through the protective member fixing pins (14) and the protective member connection holes.

2. The flexible central guardrail according to claim 1, wherein: A foundation stone layer (26) is provided between the described road surface base layer (20), the reinforced concrete pedestal (18), and the backfill soil layer (19). The top surface of the road surface base layer (20) is on the same horizontal plane as the top surfaces of the reinforced concrete pedestal (18) and the backfill soil layer (19).

3. The flexible central guardrail according to claim 1, wherein: A sizing rigid mold (27) is provided in the described reinforced concrete pedestal (18). The sizing rigid mold (27) is a stepped sheet structure with a gradually narrowing bottom and symmetrical sides.

4. The flexible central guardrail according to claim 1, wherein: The described protective member (17) is a long rectangular pipe, an M-shaped corrugated plate, a double-wave corrugated plate, or a triple-wave corrugated plate. The described embedded bolt (9) is a rod-shaped structure with a vertical or bent bottom and a vertical upper part.

5. The flexible central guardrail according to claim 1, characterized in that: The outer side of the top of the embedded bolt (9) is provided with an external thread layer, and a fastening nut is fitted outside the external thread layer. The fastening nut is movably arranged outside the bolt hole (28) on the upper part of the bottom connecting seat (11). The bottom connecting seat (11) is fixedly installed at the central position on the top of the reinforced concrete base (18) through the embedded bolt (9) and the fastening nut. The bottom connecting seat (11) is a square, rectangular, hexagonal with a rectangle in the middle and symmetrical obtuse triangles on both sides, or hexagonal plate-like structure with a square in the middle and symmetrical obtuse triangles on both sides. The bottom of the base longitudinal connecting frame (12) and the outer edge of the top of the bottom connecting seat (11) are an integral structure. The base longitudinal connecting frame (12) is a square, rectangular, hexagonal with a rectangle in the middle and symmetrical obtuse triangles on both sides, or hexagonal frame structure with a square in the middle and symmetrical obtuse triangles on both sides. The inner wall of the bottom of the longitudinal support groove plate (1) coincides with half of the outer wall of the base longitudinal connecting frame (12). After the two longitudinal support groove plates (1) are butted, the inner wall of their bottom coincides with the outer wall of the base longitudinal connecting frame (12). The base longitudinal connecting frame bolt holes (13) and the longitudinal support groove plate bottom bolt holes (4) which correspond to each other are respectively opened on the side wall of the base longitudinal connecting frame (12) and the bottom side wall of the longitudinal support groove plate (1). Bolts are installed in the base longitudinal connecting frame bolt holes (13) and the longitudinal support groove plate bottom bolt holes (4).

6. The flexible central guardrail according to claim 1, wherein: The longitudinal docking connecting piece (7) is a rectangular sheet-like structure. The longitudinal docking connecting piece (7) and the longitudinal support groove plate (1) are an integral structure. The height of the longitudinal support groove plate (1) is equal to the length of the longitudinal docking connecting piece (7). The top cover frame (10) is a square, rectangular, hexagonal with a rectangle in the middle and symmetrical obtuse triangles on both sides, or hexagonal frame structure with a square in the middle and symmetrical obtuse triangles on both sides. The top of the top cover frame (10) and the bottom of the cover plate (5) are an integral structure. The cover plate (5) is a square, rectangular, hexagonal with a rectangle in the middle and symmetrical obtuse triangles on both sides, or hexagonal plate-like structure with a square in the middle and symmetrical obtuse triangles on both sides. The shape and size of the cover plate (5) are equal to those of the bottom connecting seat (11). The shape and size of the top cover frame (10) and the base longitudinal connecting frame (12) are equal. The inner wall of the bottom of the longitudinal support groove plate (1) coincides with half of the outer wall of the top cover frame (10). After the two longitudinal support groove plates (1) are butted, the inner wall of their bottom coincides with the outer wall of the top cover frame (10). The top cover bolt holes (29) and the longitudinal support groove plate top bolt holes (3) which correspond to each other are respectively opened on the side wall of the top cover frame (10) and the top side wall of the longitudinal support groove plate (1). Bolts are installed in the top cover bolt holes (29) and the longitudinal support groove plate top bolt holes (3).

7. The flexible central guardrail according to claim 1, wherein: The described horizontal strengthening connection holes (2) are circular through-holes. On each longitudinal support groove plate (1), at least four groups of strengthening connection holes (2) are arranged in pairs. The four groups of strengthening connection holes (2) are distributed in a rectangular array at the central position of the longitudinal support groove plate (1). The length from the midline of the two upper groups of strengthening connection holes (2) to the top of the longitudinal support groove plate (1) is equal to the length from the midline of the two lower groups of strengthening connection holes (2) to the bottom of the longitudinal support groove plate (1). The length between the midlines of the two upper groups of strengthening connection holes (2) and the midlines of the two lower groups of strengthening connection holes (2) is equal to the length from the midline of the two upper groups of strengthening connection holes (2) to the top of the longitudinal support groove plate (1).

8. The flexible central guardrail according to claim 1, characterized in that: The length of the described protective part fixing pin (14) is twice the thickness of the longitudinal support groove plate (1). The length between the inner walls after the combination of the two longitudinal support groove plates (1) is not greater than the length of the protective part fixing pin (14). A limit fastening block (15) is fixedly installed on one side of the protective part fixing pin (14). On the other end of the protective part fixing pin (14), a protective part limit fixing nut (16) is installed by threading. Protective installation holes matching the strengthening connection holes (2) are opened at both ends of the protective part (17). The limit fastening block (15) is arranged outside the protective installation hole of the protective part (17) on one side of the longitudinal support groove plate (1), and the limit fastening block (15) is arranged outside the protective installation hole of the protective part (17) on the other side of the longitudinal support groove plate (1).

9. A construction method of a flexible central guardrail according to any one of claims 1-8, characterized in that, Its construction and installation method is as follows: Step 1: Reserve a reinforced concrete base installation groove (25) in the middle of the road base (20), and excavate a bottom drainage pipe gallery groove (21) at the bottom of the reinforced concrete base installation groove (25). The bottom drainage pipe gallery groove (21) is an isosceles trapezoidal structure with a larger upper cross-section and a smaller lower cross-section. Excavate a water infiltration groove (23) at the bottom of the bottom drainage pipe gallery groove (21), and pre-bury a drainage pipe (24) and fill a sand and gravel layer in the water infiltration groove (23). Then install an underground line pipe gallery (22) on the bottom surface of the bottom drainage pipe gallery groove (21). The top of the underground line pipe gallery (22) is on the same horizontal plane as the top of the bottom drainage pipe gallery groove (21). Then backfill the bottom drainage pipe gallery groove (21); Step 2: The reinforced concrete base installation groove (25) is a stepped groove structure with a gradually shrinking bottom and symmetric sides. The inner wall of the reinforced concrete base installation groove (25) fits the outer wall of the reinforced concrete base (18). Install two pieces of shaped steel molds (27) into the reinforced concrete base installation groove (25) according to a preset spacing, and pour concrete between the two pieces of shaped steel molds (27). Cure the concrete as soon as possible after the surface slurry has set. Cover it with geotextile. When it reaches 80% of the design strength, remove the molds; Step 3: After the reinforced concrete base (18) is made, backfill the backfill soil layer (19) between the two reinforced concrete bases (18), and control the backfill of the backfill soil layer (19) to be flush with the top surface of the reinforced concrete base (18); Step 4: After the backfill layer (19) is backfilled, install the embedded bolts (9) at the preset positions on the top of the reinforced concrete pedestal (18). Install the embedded bolts (9) at the corresponding preset positions by means of drilling and embedding or pre-embedding. Then, sleeve the bottom connecting seat (11) onto the embedded bolts (9), insert the embedded bolts (9) into the bolt holes (28), and fix and install the bottom connecting seat (11) on the top of the reinforced concrete pedestal (18) by using fastening nuts on the top of the bottom connecting seat (11). Step 5: Fix the bottoms of two longitudinal support channel plates (1) to the outer wall of the base longitudinal connecting frame (12) by bolts. Then, install the top cover frame (10) and the cover plate (5) on the tops of the two longitudinal support channel plates (1) by bolts. A handle (6) is provided on the top surface of the cover plate (5). After installation, install and tighten bolts in the longitudinal docking connection holes (8) provided on the two longitudinal docking connection pieces (7). Step 6: Finally, align the protection installation holes provided at both ends of the protection member (17) with the strengthening connection holes (2) respectively, and insert the protection member fixing pin (14) into the protection installation holes and the strengthening connection holes (2). The limit fastening block (15) is reserved outside the protection installation hole provided on the protection member (17) on one side of the longitudinal support channel plate (1). The other end of the protection member fixing pin (14) passes through the longitudinal support channel plate (1) to the other side, and install the protection member limit fixing nut (16) at the end of the part of the protection member fixing pin (14) that penetrates out. After installation, the protection member limit fixing nut (16) is located outside the protection installation hole provided on the protection member (17) on the other side of the longitudinal support channel plate (1).

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