Prefabricated concrete segmental fence

Abstract

The application discloses a prefabricated concrete assembled guardrail, which comprises a concrete layer, a keel layer and a fiber cotton layer from outside to inside; the keel layer comprises interconnected pipes, reinforcing ribs are arranged on the pipe wall, the pipes are filled with shear thickening liquid STF, and a plurality of through holes are arranged on the pipe wall; the pipes are provided with connecting pipes at the bottom of the concrete layer, which are used for connecting the guardrail installation foundation; the fiber cotton layer is filled between the keel layer and the concrete coating, the fiber gaps of the fiber cotton are filled with shear thickening liquid STF; the top of the concrete layer is provided with a shear thickening liquid STF outlet, and the bottom of the concrete layer is provided with a shear thickening liquid STF inlet. The application has the beneficial effect that when the guardrail is subjected to external force such as vehicle impact, the external force can be absorbed to reduce the reaction force on the vehicle during impact, the vehicle damage is reduced, the safety of the passengers is protected, and the occurrence of accidents caused by the vehicle destroying the guardrail and rushing into the bridge is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of road and bridge guardrails, and particularly relates to a prefabricated concrete assembled guardrail. BACKGROUND

[0002] With the vigorous development of rural revitalization and highway transportation in China, the traffic volume is rapidly increasing, and higher requirements are put forward for the safety of highway transportation facilities. Especially for old bridge and road reconstruction, generally, concrete guardrails are arranged. In order to improve the construction efficiency, the on-site binding of steel bars, the erection of formwork and then the pouring of concrete are generally adopted.

[0003] The bridge guardrail made in this way is a rigid impact when a vehicle collides with it, and the guardrail is easily broken, which leads to the accident that the vehicle rushes into the bridge, or the vehicle does not break the guardrail, but is subjected to the reaction force of the guardrail, which is too large, even bounces, causes the vehicle to overturn, and causes the accident of falling into the bridge.

[0004] In summary, the road and bridge guardrail of the prior art has the technical problem that when a vehicle collides with the guardrail, the vehicle is easy to break the guardrail and rush into the bridge. SUMMARY

[0005] The object to be achieved by the application is to solve the technical problem that the road and bridge guardrail of the prior art is easy to break the guardrail and rush into the bridge when a vehicle collides with the guardrail.

[0006] In order to achieve the above object, the application provides a prefabricated concrete assembled guardrail.

[0007] The specific technical scheme adopted by the application is as follows:

[0008] A prefabricated concrete assembled guardrail comprises, from the outside to the inside, a concrete layer, a keel layer and a fiber cotton layer:

[0009] The keel layer comprises interconnected pipelines, the pipeline wall is provided with a reinforcing rib, the pipeline is filled with a shear thickening liquid STF, and the pipeline wall is provided with a plurality of through holes; the pipeline is provided with a connecting pipe at the bottom of the concrete layer, for connecting the guardrail foundation;

[0010] The fiber cotton layer is filled between the keel layer and the concrete coating, and the fiber gaps of the fiber cotton layer are filled with the shear thickening liquid STF;

[0011] The shear thickening liquid STF can be exchanged between the pipeline and the fiber cotton layer through the through holes;

[0012] The top of the concrete layer is provided with a shear thickening liquid STF outlet, and the bottom of the concrete layer is provided with a shear thickening liquid STF inlet.

[0013] Through such a design, when the vehicle hits the guardrail, due to the structure of the vehicle, the impact point is located at the upper part of the guardrail, and the fixed position of the guardrail and the bridge is located at the bottom of the guardrail, so there is a certain distance between the impact point and the fixed position, which forms the condition of the moment, and the force generated by the impact is transmitted to the keel layer and the fiber cotton layer through the concrete layer, and is transmitted to the fixed position of the guardrail and the bridge through the keel layer and the fiber cotton layer. Since the keel layer and the fiber cotton layer are filled with shear thickening liquid STF, the force generated by the impact is absorbed by the shear thickening liquid STF;

[0014] The shear thickening liquid STF is composed of polyethylene glycol and silicon microparticles. Polyethylene glycol is a widely used non-toxic liquid that can withstand a wide temperature range. The extremely small silicon microparticles are another component of STF. When the motion is slow, the hard particles can move everywhere, and the shear thickening liquid STF appears in a liquid state. However, when the motion is rapid, the hard particles collide with each other, hindering each other's motion, and the shear thickening liquid STF becomes strong. This highly fluid liquid and hard particles combined can form a rigid material.

[0015] The force generated by the impact is transmitted to the keel layer and the fiber cotton layer through the concrete layer, and is transmitted to the fixed position of the guardrail and the bridge through the keel layer and the fiber cotton layer. In this process, since the keel layer and the fiber cotton layer are filled with shear thickening liquid STF, the force generated by the impact is absorbed by the shear thickening liquid STF, and the energy required for the transition from liquid to solid state;

[0016] It is worth mentioning that due to the certain distance between the impact point and the fixed position, the energy absorption forms a certain gradient. After the top shear thickening liquid STF solidifies, the subsequent bottom shear thickening liquid STF follows to solidify, so that when the vehicle hits the bridge, it is like hitting an elastic rod;

[0017] Further, since the fixed position of the guardrail and the bridge is also provided with shear thickening liquid STF, the force generated by the impact is first absorbed when acting on the fixed position of the guardrail and the bridge, causing the shear thickening liquid STF to transition from a liquid to a solid state, further weakening the impact force. At the same time, since the shear thickening liquid STF has become a solid, it serves to reinforce the fixed position of the guardrail and the bridge, preventing the guardrail from breaking;

[0018] Through the above series of absorption and conversion, the force generated by the vehicle hitting the guardrail is greatly weakened, effectively solving the technical problem that when the vehicle hits the guardrail, the vehicle is easily broken and crashes into the bridge.

[0019] In addition, the keel layer comprises pipes which are connected to each other, and the pipe wall is provided with reinforcing ribs, which can provide support for the fiber cotton layer, maintain the shape of the fiber cotton layer in the prefabrication process, and ensure the smooth prefabrication of the prefabricated concrete assembled guardrail.

[0020] Furthermore, the present application replaces the conventional steel bars with the shear thickening fluid STF to realize the rigid support of the prefabricated concrete assembled guardrail.

[0021] As a further improvement of the present application, the pipe is a plastic pipe, and the pipe wall is coated with DPA-1 two-dimensional polymer.

[0022] As a further improvement of the present application, the pipe is a plastic pipe, and the pipe wall is coated with DPA-1 two-dimensional polymer.

[0023] The present application uses the advantages of high strength, high hardness and light weight of the DPA-1 two-dimensional polymer to replace the conventional steel bars, reduces the total weight of the prefabricated concrete assembled guardrail, saves space through coating, provides more space for filling the shear thickening fluid STF in the prefabricated concrete assembled guardrail, and better absorbs the impact force generated when a vehicle hits the guardrail.

[0024] As a further improvement of the present application, the pipe comprises high rail support pipes, base pipes and connecting pipes which are connected to each other:

[0025] The high rail support pipes are inverted V-shaped, and the two sides of the high rail support pipes are connected through first connecting pipes, and the base pipes are inverted U-shaped.

[0026] The bottom of the base pipe is connected through a second connecting pipe, and the two sides of the base pipe are connected to the second connecting pipe through third connecting pipes, and the third connecting pipes form support arms on the two sides of the base pipe.

[0027] The connecting pipes comprise two rows and are connected together through fourth connecting pipes, the bottom of the connecting pipe is provided with an opening for guardrail foundation, and the side of the connecting pipe is provided with a first inlet of the shear thickening fluid STF.

[0028] A specific keel layer structure is provided, which realizes the support of the fiber cotton layer, and provides the reinforcing support of the keel layer itself and the connecting and reinforcing structure of the bridge foundation.

[0029] As a further improvement of the present application, the guardrail mounting foundation comprises a prefabricated insert and a concrete foundation for fixing the prefabricated insert, the prefabricated insert is in a convex shape, the bottom side of the prefabricated insert is provided with a fixing clamping groove of the guardrail, the top is provided with a sealing strip, the bottom side of the concrete layer is clamped on the sealing strip, the bottom of the connecting pipe and the fourth communication pipe are located in the prefabricated insert, and the prefabricated insert is filled with shear thickening fluid STF.

[0030] As a further improvement of the present application, the bottom of the insert is provided with a first fixing rod, and the first fixing rod is inserted into the connecting pipe.

[0031] As a further improvement of the present application, the top of the fixing clamping groove is provided with a second inlet of shear thickening fluid STF, and the second inlet is provided with a blockage.

[0032] As a further improvement of the present application, the top side of the concrete layer is provided with a second through hole, a second fixing rod is arranged in the second through hole, the second fixing rod penetrates through the pipe or the fiber cotton layer, and a crash stopper is fixed to the exposed end of the second fixing rod.

[0033] As a further improvement of the present application, the crash stopper is a wave-shaped beam.

[0034] As a further improvement of the present application, the crash stopper comprises a vertical rotating shaft arranged on a fixing plate, and a spherical rubber sleeve is sleeved on the rotating shaft.

[0035] As a further improvement of the present application, the spherical rubber sleeve is filled with shear thickening fluid STF.

[0036] The positive effects of the present application are:

[0037] When the guardrail is subjected to external force such as vehicle impact, the reaction force on the vehicle during impact can be reduced by absorbing the external force, the vehicle damage is reduced, the safety of the passengers is protected, and the occurrence of accidents caused by the vehicle destroying the guardrail and rushing into the bridge is reduced.

[0038] 2. The force generated by the impact is transmitted to the keel layer and the fiber cotton layer through the concrete layer, and is transmitted to the fixed position of the guardrail and the bridge through the keel layer and the fiber cotton layer. In this process, since the keel layer and the fiber cotton layer are filled with shear thickening fluid STF, the force generated by the impact is absorbed by the shear thickening fluid STF, and the energy required for the transition from liquid to solid state; since there is a certain distance between the impact point and the fixed position, the energy absorption forms a certain gradient, and after the shear thickening fluid STF at the top is solidified, the shear thickening fluid STF at the bottom follows to solidify, so that the vehicle is like hitting an elastic rod when hitting the bridge.

[0039] 3. The fixed position of the guardrail and the bridge is also provided with shear thickening liquid STF, so that the force generated when the impact is first absorbed when acting on the fixed position of the guardrail and the bridge, so that the shear thickening liquid STF changes from liquid to solid, further weakening the impact force, and at the same time, the shear thickening liquid STF changes to solid, which serves to reinforce the fixed position of the guardrail and the bridge, and can prevent the guardrail from breaking. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a structural schematic diagram of a prefabricated concrete assembled guardrail of the present application;

[0041] Figure 2 is a structural schematic diagram of a prefabricated concrete assembled guardrail and a guardrail installation foundation connection of the present application;

[0042] Figure 3 is a structural schematic diagram of a second embodiment of a prefabricated concrete assembled guardrail of the present application;

[0043] Figure 4 is a structural schematic diagram of a third embodiment of a prefabricated concrete assembled guardrail of the present application;

[0044] Legend: 1 - concrete layer, 2 - keel layer, 3 - base pipe shoulder, 4 - third communication pipe, 5 - connecting pipe, 6 - first outlet, 7 - fourth communication pipe, 8 - second outlet, 9 - fiber cotton layer, 10 - third inlet, 11 - sealing strip, 12 - fixed clamping groove, 13 - guardrail installation foundation, 14 - prefabricated insert, 15 - corrugated beam, 16 - second fixed rod, 17 - nut, 18 - fixed plate, 19 - rotating shaft, 20 - spherical rubber sleeve, 21 - high rail support pipe, 22 - first communication pipe, 23 - base pipe, 24 - second communication pipe, 25 - first inlet, 26 - plugging, 27 - second inlet, 28 - first fixed rod. DETAILED DESCRIPTION

[0045] The present application will be described in detail below in conjunction with the drawings and specific embodiments:

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0047] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0048] The specific implementation of the present application is described in detail below in combination with specific examples.

[0049] Example 1

[0050] As Figure 1 and Figure 2 A prefabricated concrete assembled guardrail, comprising a concrete layer 1, a keel layer 2 and a fiber cotton layer 9:

[0051] The keel layer 2 comprises mutually connected pipes, the pipe wall is provided with reinforcing bars, the pipes are filled with shear thickening liquid STF, the pipe wall is provided with a plurality of through holes, and the pipes comprise high rail support pipes 21, base pipes 23 and connecting pipes 5 which are mutually connected to each other:

[0052] The high rail support pipes 21 are inverted V-shaped, the high rail support pipes 21 are connected together through three first communication pipes 22 on both sides, and the base pipes 23 are inverted U-shaped; the two ends of the bottom opening of the base pipes 23 are connected through second communication pipes 24, the base pipes 23 are provided with base pipe shoulder portions 3 at the top, the third communication pipes 4 of the two base pipe shoulder portions 3 are connected with the second communication pipes 24, and the third communication pipes 4 form support arms on both sides of the base pipes 23, which support both sides of the base pipes 23;

[0053] The connecting pipes 5 comprise two rows which are connected together through fourth communication pipes 7, the bottom of the connecting pipes 5 is provided with an opening, the opening comprises a first outlet 6 and a second outlet 8, which are used to connect the guardrail with a guardrail installation foundation 13, and are also used for the shear thickening liquid STF to enter and exit the guardrail installation foundation and the pipes, the side of the connecting pipes is provided with a first inlet 25 of the shear thickening liquid STF, and the top of the concrete layer is provided with a third inlet 10 for the shear thickening liquid STF to enter and exit;

[0054] The guardrail installation foundation 13 comprises a prefabricated insert 14 and a concrete foundation for fixing the prefabricated insert, the prefabricated insert 14 is in the shape of a Chinese character, the bottom side of the prefabricated insert 14 is provided with a fixed clamping groove 12 of the guardrail, and the top is provided with a sealing strip 11, the bottom side of the concrete layer 1 is clamped on the sealing strip 11, the bottom of the connecting pipes 5 and the fourth communication pipes 7 are located in the cavity of the prefabricated insert 14, and the prefabricated insert 14 is filled with the shear thickening liquid STF.

[0055] During prefabrication:

[0056] The fiber cotton layer 9 is arranged on the top of the connecting pipes 5 according to the shape of the connecting pipes 5, and the fiber cotton layer 9 is arranged on the top of the base pipes 23 according to the shape of the base pipes 23. Figure 1The shape shown is cut and filled in the middle of the keel layer 2. A layer of water-soluble paper is attached to the interface between the keel layer 2 and the concrete layer 1 to prevent concrete from entering the fiber cotton layer 9 during concrete pouring. The keel layer 2 has outwardly protruding conical rods that bond with the concrete layer to increase the bonding strength between the keel layer 2 and the concrete layer, preventing the concrete layer from falling off naturally. Then, it is joined with... Figure 1 The mold matching the concrete layer 1 shown is fixed on the outer layer of the keel layer 2. The concrete is poured to complete the prefabrication. The water in the concrete dissolves the water-soluble paper, thereby eliminating the isolation between the keel layer 2 and the concrete layer, and preventing the slurry in the concrete from entering the fiber layer.

[0057] The third entrance has 10 prefabricated connecting parts for hoisting. When hoisting is required, the hoisting ring can be fixed to the connecting parts. The connection between the connecting parts and the hoisting ring is existing technology and is well known to those skilled in the art, so it will not be described in detail here.

[0058] In addition, the keel layer includes interconnected pipes with reinforcing ribs on the pipe walls to support the fiber cotton layer, maintaining its shape during the prefabrication process and ensuring its integrity.

[0059] The prefabrication of precast concrete guardrails is progressing smoothly.

[0060] In practical use:

[0061] like Figure 2 As shown, the lifting ring is fixed at the third inlet 10, the guardrail is lifted and placed above the precast insert 14, the bottom of the concrete layer 1 is tightly connected with the sealing strip 11, and then the shear thickening liquid STF is slowly injected from the first inlet 25 or the second inlet 27. The shear thickening liquid STF fills the cavity of the precast insert 14 and enters the connecting pipe 5, the base pipe 23 and the high railing support pipe 21 through the first outlet 6 and the second outlet 8. At the same time, the fiber cotton layer 9 is also immersed in the shear thickening liquid STF. When the shear thickening liquid STF overflows from the third inlet 10, the injection is stopped, and then the first inlet 25 or the second inlet 27 is opened to release a certain amount of shear thickening liquid STF, so that the sealing position at the third inlet 10 leaks out.

[0062] Here, the above purpose can also be achieved by directly removing the excess shear-thickening liquid STF from the third inlet 10 without opening the first inlet 25 or the second inlet 27.

[0063] Then, seal the first entrance 25, the second entrance 27, and the third entrance 10 to complete the installation.

[0064] Effect Analysis:

[0065] When the vehicle hits the guardrail, due to the structure of the vehicle, the impact point is located at the upper part of the guardrail, and the fixing position of the guardrail and the bridge is located at the bottom of the guardrail, so there is a certain distance between the impact point and the fixing position, which forms the condition of the moment, and the force generated by the impact is transmitted to the keel layer and the fiber cotton layer through the concrete layer, and is transmitted to the fixing position of the guardrail and the bridge through the keel layer and the fiber cotton layer, and since the keel layer and the fiber cotton layer are filled with shear thickening liquid STF, the force generated by the impact is absorbed by the shear thickening liquid STF.

[0066] The shear thickening liquid STF is composed of polyethylene glycol and silicon microparticles, and the polyethylene glycol is a widely used non-toxic liquid that can withstand a wide temperature range. The extremely fine silicon microparticles are another component of STF. When the motion is slow, the hard particles can move everywhere, and the shear thickening liquid STF appears in a liquid state, but when the motion is rapid, the hard particles collide with each other, hindering each other's motion, and the shear thickening liquid STF becomes strong. This liquid with strong flowability and hard particles combined can form a rigid material.

[0067] The force generated by the impact is transmitted to the keel layer and the fiber cotton layer through the concrete layer, and is transmitted to the fixing position of the guardrail and the bridge through the keel layer and the fiber cotton layer, and in this process, since the keel layer and the fiber cotton layer are filled with shear thickening liquid STF, the force generated by the impact is absorbed by the shear thickening liquid STF, and the energy required for the transition from liquid to solid state;

[0068] It is worth mentioning that due to the certain distance between the impact point and the fixing position, the energy absorption forms a certain gradient, and after the shear thickening liquid STF at the top solidifies, the subsequent shear thickening liquid STF at the bottom follows to solidify, so that when the vehicle hits the bridge, it is like hitting an elastic rod;

[0069] Further, since the fixing position of the guardrail and the bridge is also provided with shear thickening liquid STF, when the impact force acts on the fixing position of the guardrail and the bridge, it is first absorbed, so that the shear thickening liquid STF is converted from a liquid state to a solid state, further weakening the impact force, and at the same time, since the shear thickening liquid STF becomes solid, it serves to reinforce the fixing position of the guardrail and the bridge, and can prevent the guardrail from breaking;

[0070] Through the above series of absorption and conversion, the force generated by the vehicle hitting the guardrail is greatly weakened, which can effectively solve the technical problem that when the vehicle hits the guardrail, the vehicle is easy to break the guardrail and fall into the bridge.

[0071] Moreover, the shear thickening liquid STF of the present application replaces the traditional steel bars to realize the rigid support of the prefabricated concrete assembled guardrail.

[0072] Example 2:

[0073] like Figure 2 As shown, based on Embodiment 1, the bottom of the prefabricated insert 14 is provided with a first fixing rod 28. During installation, the first fixing rod 28 is inserted into the connecting pipe, that is, the first fixing rod 28 is inserted into the first outlet 6 and the second outlet 8.

[0074] Used to reinforce the connection between the keel layer 2 and the prefabricated inserts.

[0075] Example 3:

[0076] like Figure 3 As shown, based on Embodiment 1, a second through hole is provided on the top side of the concrete layer 1, and a second fixing rod 16 is provided in the second through hole. The second fixing rod 16 passes through the pipe or fiber cotton layer and is fixed to the guardrail by a nut 17. A corrugated beam 15 is fixed to the exposed end of the second fixing rod 16. The corrugated beam 15 is a protective structure known in the art and will not be described in detail here.

[0077] Example 4:

[0078] like Figure 4 As shown, based on Embodiment 1, a second through hole is provided on the top side of the concrete layer 1, and a second fixing rod 16 is provided in the second through hole. The second fixing rod 16 passes through the pipe or fiber cotton layer and is fixed to the guardrail by a nut 17. A fixing plate 18 is fixed to the exposed end of the second fixing rod 16. A vertical rotating shaft 19 is provided on the fixing plate 18, and a spherical rubber sleeve 20 is fitted on the rotating shaft.

[0079] Further improvements include filling the spherical rubber sleeve with a shear-thickening liquid, STF.

[0080] The foregoing has broadly outlined some aspects and features of the various embodiments and should be interpreted as merely illustrative of potential applications. Other beneficial results can be obtained by applying the disclosed information in different ways or by combining aspects of the disclosed embodiments. Further aspects and a more complete understanding can be obtained based on the detailed description of exemplary embodiments with reference to the accompanying drawings, within the scope defined by the claims.

[0081] The above embodiments provide a detailed description of the present invention. Of course, the above description is not intended to limit the present invention, nor is the present invention limited to the examples described above. Any changes, modifications, additions, reductions, or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. A precast concrete assembled guardrail, characterized in that, From the outside in, it includes a concrete layer, a joist layer, and a fiber cotton layer: The keel layer includes interconnected pipes with reinforcing ribs on the pipe walls and filled with shear-thickening liquid STF. The pipe walls have several through holes. The pipes are connected to the bottom of the concrete layer for connecting to the guardrail installation foundation. The fiber cotton layer is filled between the keel layer and the concrete layer, and the fiber gaps of the fiber cotton layer are filled with shear-thickening liquid STF. The shear-thickening liquid STF can interact between the pipe and the fiber cotton layer through the through hole; The top of the concrete layer is provided with a shear-thickening liquid STF outlet, and the bottom of the concrete layer is provided with a shear-thickening liquid STF inlet; The connecting pipe includes two rows connected together by a fourth connecting pipe. The bottom of the connecting pipe is provided with an opening for the guardrail installation foundation. The side of the connecting pipe is provided with a first inlet for shear-thickening liquid STF. The guardrail installation foundation includes precast inserts and a concrete foundation for fixing the precast inserts. The precast inserts are convex in shape. The bottom side of the precast inserts is provided with a fixing groove for the guardrail, and the top is provided with a sealing strip. The bottom side of the concrete layer is engaged with the sealing strip. The bottom of the connecting pipe and the fourth connecting pipe are located inside the precast inserts. The precast inserts are filled with shear thickening liquid STF. The fiber cotton layer is cut to a shape that matches the keel layer and filled in the middle of the keel layer. A layer of water-soluble paper is attached at the interface between the keel layer and the concrete layer to prevent concrete from entering the fiber cotton layer during concrete pouring. The keel layer has outwardly protruding conical rods that combine with the concrete layer. The keel layer is fixed to the outer layer with a mold that matches the concrete layer, and the concrete pouring begins until the prefabrication is completed. The water in the poured concrete dissolves the water-soluble paper, eliminating the barrier between the keel layer and the concrete layer. The keel layer includes interconnected pipes with reinforcing ribs on the pipe walls to support the fiber cotton layer and maintain its shape during the prefabrication process.

2. The precast concrete assembled guardrail according to claim 1, characterized in that, The pipe is a plastic pipe with its wall coated with DPA-1 two-dimensional polymer.

3. The precast concrete assembled guardrail according to claim 2, characterized in that, The pipeline includes a high-bar support pipe, a base pipe, and a connecting pipe that are interconnected with each other: The high railing support tube is inverted V-shaped, and the two sides of the high railing support tube are connected by a first connecting tube. The base tube is inverted U-shaped. The bottom of the base tube is connected through a second connecting tube, and the two sides of the base tube are connected to the second connecting tube through a third connecting tube, which forms the support arms on both sides of the base tube. The connecting pipe consists of two rows connected together by a fourth connecting pipe. The bottom of the connecting pipe has an opening for the guardrail installation foundation, and the side of the connecting pipe has a first inlet for shear-thickening liquid STF.

4. The precast concrete assembled guardrail according to claim 3, characterized in that, The insert has a first fixing rod at its bottom, which is inserted into the connecting tube.

5. The precast concrete assembly guardrail according to claim 4, characterized in that, The top of the fixed slot is provided with a second inlet for shear-thickening liquid STF, and the second inlet is sealed.

6. The precast concrete assembled guardrail according to claim 4, characterized in that, The top side of the concrete layer is provided with a second through hole, and a second fixing rod is provided in the second through hole. The second fixing rod passes through the pipe or fiber cotton layer, and a collision avoidance device is fixed to the exposed end of the second fixing rod.

7. The precast concrete assembled guardrail according to claim 6, characterized in that, The anti-collision device is a corrugated beam.

8. The precast concrete assembled guardrail according to claim 7, characterized in that, The anti-collision device includes a vertical rotating shaft on a fixed plate, and a spherical rubber sleeve is fitted on the rotating shaft.

9. A precast concrete assembly guardrail according to claim 8, characterized in that, The spherical rubber sleeve is filled with shear-thickening liquid STF.

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