A type of median strip guardrail

Abstract

This utility model discloses a central median barrier, comprising: several precast concrete units and several connecting components 11; each precast concrete unit is connected and fixed by a connecting component 11; the precast concrete units are sequentially spliced ​​along their respective length directions and connected to form a ring structure; each precast concrete unit encloses a filling trench, which is filled with crushed stone and soil generated during construction. Thus, because the precast concrete units are standardized and produced in a factory, compared to traditional on-site pouring construction, which requires a large number of workers for a series of complex and tedious procedures such as formwork erection, concrete mixing, pouring, vibration, and subsequent curing, this method effectively reduces various costs. Furthermore, the factory-precast concrete units and on-site construction can be carried out simultaneously, thereby accelerating the construction progress.

Description

Technical Field

[0001] This utility model relates to the field of highway construction technology, and in particular to a central median guardrail. Background Technology

[0002] In highway construction, conventional median barriers are filled with planting soil in the middle for planting greenery. The construction of the barriers involves a large amount of planting soil to ensure the growth of the greenery. In addition, the installation of median barriers involves multiple steps, such as the installation of rigid barriers. Each step requires a certain amount of manpower, material resources and financial resources, resulting in high construction costs and material waste. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a central divider guardrail.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A central median barrier includes: a plurality of precast concrete units and a plurality of connecting components; each of the precast concrete units is connected and fixed by a connecting component; each of the precast concrete units is sequentially spliced ​​along its respective length direction and connected to form a ring structure; each of the precast concrete units encloses and defines a backfill trench, the backfill trench being filled with gravel and soil generated during construction.

[0006] The beneficial effects of this invention are as follows: Because precast concrete units are produced in a standardized manner in a factory, compared to traditional on-site pouring construction, which requires a large number of workers for a series of complex and tedious procedures such as formwork erection, concrete mixing, pouring, vibration, and subsequent curing, this invention effectively reduces various costs. Furthermore, factory-precast concrete units and on-site construction can be carried out simultaneously. When on-site construction meets the installation conditions, the precast concrete units can be directly transported to the site for rapid assembly and installation, thereby accelerating the construction progress.

[0007] Preferably, the connecting assembly includes: a first connector and a second connector disposed on both sides of the precast concrete unit in the thickness direction, and connecting bolts; the first connector and the second connector are fitted at the joint of the two precast concrete units, and there are at least two connecting bolts, which are respectively disposed through the two precast concrete units.

[0008] Preferably, the first connector is an anchoring steel bar partially embedded in the precast concrete unit, wherein the end region of the anchoring steel bar is embedded in the precast concrete unit.

[0009] Preferably, the connecting assembly further includes an anchoring steel plate, through which the connecting bolt passes; the middle section of the anchoring rebar is exposed outside the precast concrete unit, and the anchoring steel plate is clamped between the bolt head and the middle section of the anchoring rebar.

[0010] Preferably, the second connector is a square hollow steel, and the threaded part of the connecting bolt passes through the second connector and is fitted with a nut. The nut and the threaded part are pre-embedded in the precast concrete unit.

[0011] Preferably, the precast concrete unit includes a steel reinforcement cage, which includes a longitudinal cage and a transverse cage. The longitudinal cage is arranged along the height direction of the precast concrete unit, and the transverse cage is arranged along the length direction of the precast concrete unit, and the two are arranged orthogonally. The longitudinal cage includes a first longitudinal cage located away from the backfill trench and a second longitudinal cage located near the backfill trench. Wherein, along the height direction of the precast concrete unit, the distance between the first longitudinal cage and the second longitudinal cage is larger as they are closer to the ground.

[0012] Preferably, the first longitudinal frame is a bent structure, including a first segment close to the ground, the first segment bends towards the backfill trench to extend into a second segment, the angle between the first segment and the second segment is an obtuse angle, the second segment bends away from the ground to extend into a third segment, and the third segment gradually approaches the second longitudinal frame.

[0013] Preferably, the steel reinforcement cage further includes an annular cage, which is constructed in a trapezoidal shape, with the larger end of the annular cage close to the ground.

[0014] Preferably, the filling trench is provided with the following components in sequence along the height direction: a support block; a sand filling layer above the support block; and a gravel layer above the sand filling layer.

[0015] Preferably, the precast concrete unit is also provided with a drainage hole, and the end of the drainage hole facing the backfill trench faces the sand filling layer. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a central median barrier according to some embodiments of this application;

[0017] Figure 2 This is a schematic diagram of the end area of ​​the central median barrier according to some embodiments of this application;

[0018] Figure 3 This is an elevation view of a central median barrier according to some embodiments of this application;

[0019] Figure 4 for Figure 3 A cross-sectional view of the centerline AA;

[0020] Figure 5 for Figure 4 A magnified view of a portion of area B in the center circle;

[0021] Figure 6 This is a schematic diagram of the structure of a square hollow steel according to some embodiments of this application;

[0022] Figure 7 for Figure 6 The right view;

[0023] Figure 8 This is a schematic diagram of the steel reinforcement skeleton structure within a precast concrete unit according to some embodiments of this application;

[0024] Figure 9 This is a schematic diagram of the steel reinforcement skeleton structure arrangement within a precast concrete unit from another angle.

[0025] Figure 10 This is a structural schematic diagram of each steel reinforcement cage according to some embodiments of this application.

[0026] In the picture:

[0027] 100 - Precast concrete unit;

[0028] 11-Connecting components;

[0029] 110 - First connector, 111 - Intermediate section, 112 - Anchor steel plate, 120 - Second connector, 121 - Waist hole, 130 - Connecting bolt;

[0030] 140-Support block, 150-Sand filling layer, 151-Communication hole, 160-Gravel soil layer, 170-Drainage hole;

[0031] 180-Reinforcing steel cage;

[0032] 181 - Longitudinal skeleton, 1811 - First longitudinal skeleton;

[0033] 101 - First paragraph, 12 - Second paragraph, 13 - Third paragraph, 14 - Fourth paragraph;

[0034] 1812 - Second longitudinal skeleton, 182 - Transverse skeleton, 183 - Circular skeleton;

[0035] 190-Pillow beam. Detailed Implementation

[0036] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] See Figures 1-10 This utility model provides a technical solution:

[0038] A central median barrier includes: a plurality of precast concrete units 100 and a plurality of connecting components 11.

[0039] refer to Figures 1-3 It is understood that a connecting component 11 is provided between each precast concrete unit 100 to connect and fix the two. Each precast concrete unit 100 is spliced ​​sequentially along its own length direction and connected to form a ring structure. Each precast concrete unit 100 is enclosed to define a backfill trench, which is filled with gravel and soil generated during construction.

[0040] The structure of the precast concrete unit 100 at the end area of ​​the guardrail is as follows: Figure 2 As shown, its structure is a gradient structure to ensure the safety of the opening in the central divider.

[0041] Specifically, precast concrete units 100 can be molded and cast in the factory according to standard dimensions to ensure that the specifications of each precast concrete unit 100 are consistent, which greatly facilitates the subsequent splicing and installation work and reduces errors and adjustments during on-site construction.

[0042] During the prefabrication process, a steel reinforcement cage 180 is pre-embedded inside the precast concrete unit 100 to enhance the strength and overall stability of the precast concrete unit 100. The steel reinforcement cage 180 is tightly bonded to the concrete, and when subjected to external loads, it can effectively disperse stress and prevent damage such as cracking and breakage of the concrete.

[0043] In this way, because the precast concrete units 100 are produced in a standardized manner in the factory, compared with traditional on-site pouring construction, which requires a large number of workers to carry out a series of complex and tedious procedures such as formwork construction, concrete mixing, pouring, vibration, and subsequent curing, the costs are effectively reduced. Furthermore, the factory-precast concrete units 100 and on-site construction can be carried out simultaneously. When the on-site construction conditions are met, the precast concrete units 100 can be directly transported to the site for rapid assembly and installation, thereby accelerating the construction progress.

[0044] Furthermore, the connecting assembly 11 includes a first connector 110 and a second connector 120 disposed on both sides of the precast concrete unit 100 in the thickness direction, and a connecting bolt 130; the first connector 110 and the second connector 120 are fitted at the joint of the two precast concrete units 100; as shown Figure 3 As shown, the left side of the first connector 110 is attached to the left precast concrete unit 100, and the right side is attached to the right precast concrete unit 100. The second connector 120 is attached in the same way. Accordingly, there are at least two connecting bolts 130, which are respectively installed through the two precast concrete units 100, so that the two adjacent precast concrete units 100 are connected and fixed by the connecting bolts 130 and the connecting action of the first connector 110 and the second connector 120.

[0045] In some examples, such as Figures 4-5 As shown, the first connector 110 is an anchoring steel bar partially embedded in the precast concrete unit 100, wherein the end region of the anchoring steel bar is embedded in the precast concrete unit 100. (Reference) Figure 5 As shown, the two ends of the anchoring steel bar are bent perpendicularly to the middle section 111.

[0046] In this way, the middle section 111 of the anchoring steel bar is exposed outside the precast concrete unit 100, while the bent portions at both ends are embedded in the concrete. Furthermore, as... Figure 4 As shown, the connecting assembly 11 also includes an anchoring steel plate, through which the connecting bolt 130 passes, thereby clamping the anchoring steel plate between the bolt head and the intermediate section 111 of the anchoring steel bar.

[0047] Thus, the bolt head pushes against the anchoring steel plate, and the other side of the anchoring steel plate pushes against the middle section 111 of the anchoring steel bar, so that the pressure of the connecting bolt is evenly distributed, thereby ensuring that the connecting assembly 11 can produce a uniform and stable fixing effect on the two adjacent precast concrete units 100.

[0048] Correspondingly, the second connector 120 is constructed of square hollow steel, and the threaded portion of the connecting bolt 130 passes through the second connector 120 and is fitted with a nut. The nut and the threaded portion are embedded in the precast concrete unit 100. Figures 6-7 As shown, the square hollow steel has two waist holes 121 for the threaded rod to pass through, in order to form Figure 5 As shown, the two precast concrete units 100 are fixed on both sides by the first connector 110 and the second connector 120 to connect two adjacent precast concrete units 100.

[0049] Within a backfill trench defined by several precast concrete units 100 and multiple corresponding connecting components 11, support blocks 140, a sand filling layer 150 above the support blocks 140, and several pipes arranged within the sand filling layer 150 to support communication holes 151 for cable routing, and a gravel layer 160 above the sand filling layer 150 are also arranged. Furthermore, a bolster beam 190 is provided below each precast concrete unit 100. Specifically, the bolster beam includes two beams, located below the left and right precast concrete units respectively. These two bolster beams are positioned at the bottom of the precast concrete blocks and can be leveled to ensure the elevation and alignment of the guardrail. Simultaneously, the two bolster beams allow the guardrail to be used when there is a certain height difference between the left and right sides of the central median, improving the guardrail's applicability.

[0050] On the one hand, the crushed stone soil filling the 150mm sand layer is made from waste generated during construction, saving costs; on the other hand, compared with planting soil, the waste stone soil is more prone to rainwater infiltration because there are certain gaps between the stones.

[0051] Continue to refer to Figure 1 As shown, the precast concrete unit 100 also has a drainage hole 170, with the end of the drainage hole 170 facing the backfill trench and the sand layer 150. In this way, rainwater can pass through the gaps between the stones and finally be discharged from the drainage hole 170, so as to avoid excessive water accumulation in the backfill trench, which could lead to structural instability.

[0052] Next, refer to Figures 8-10 As shown, the precast concrete unit 100 in some embodiments of this application will be described.

[0053] The precast concrete unit 100 includes a steel reinforcement cage 180. During precasting, the precast concrete unit 100 uses C30 or higher grade steel, is equipped with an HRB400 steel reinforcement cage 180, and has pre-embedded connecting components 11. After the foundation is leveled, a bedding layer is laid, and each precast concrete unit 100 is hoisted and the connecting components are tightened. In this way, the on-site hoisting of the precast concrete unit components can be carried out simultaneously with the backfilling, shortening the construction period.

[0054] For details, please refer to Figure 9 As shown, the reinforcing steel cage 180 includes a longitudinal cage 181 and a transverse cage 182. The longitudinal cage 181 is arranged along the height direction of the precast concrete unit 100, and the transverse cage 182 is arranged along the length direction of the precast concrete unit 100, and the two are arranged as shown in the figure. Figure 9 The orthogonal arrangement shown forms a stable skeletal structure.

[0055] In this example, continue to refer to Figure 8As shown, the longitudinal frame 181 includes a first longitudinal frame 1811 located away from the backfill trench and a second longitudinal frame 1812 located near the backfill trench; wherein, along the height direction of the precast concrete unit 100, the distance between the first longitudinal frame 1811 and the second longitudinal frame 1812 is greater as they are closer to the ground.

[0056] Therefore, compared to the conventional central divider with its wider, rigid end, a wider guardrail poses a risk of vehicle collision. In this embodiment, the guardrail structure defined by the first longitudinal frame 1811 and the second longitudinal frame 1812 forms a gradually tapered end design. When a vehicle collides with the guardrail, the tapered structure ensures that the collision contact is not an instantaneous, rigid, direct confrontation. The vehicle first contacts the tapered portion of the guardrail, and as the collision continues, the vehicle climbs along the guardrail's slope, thus dispersing the energy generated by the collision. Due to the gradually changing structural spacing, the impact force on the vehicle can be gradually mitigated, preventing the vehicle from bearing excessive force instantaneously, thereby effectively reducing the degree of damage to the vehicle during the collision.

[0057] For details, please refer to Figure 10 As shown, the first longitudinal frame 1811 is constructed as a bent structure, including a first segment 101 parallel to the ground, a second segment 12 extending vertically from one end of the first segment 101, a third segment 13 extending vertically from the other end of the first segment 101, and a fourth segment 14 extending from the end of the third segment 13 away from the direction of the first segment 101, with the fourth segment 14 inclined towards the direction of the backfill trench; preferably, the angle between the fourth segment 14 and the third segment 13 is 145°. Thus, by splicing the beginning of the second longitudinal frame 1812 with the fourth segment 14, a longitudinal frame structure can be formed, and the inclination of the second longitudinal frame 1812 towards the second segment 12 can form the aforementioned gradient structure.

[0058] More specifically, the first longitudinal frame 1811 and the second longitudinal frame 1812 are assembled to form Figure 8 The frame structure shown, and as Figure 8 and Figure 10 As shown, the steel reinforcement cage 180 also includes a ring cage 183, which has a trapezoidal structure with its larger end close to the ground. The transverse cage 182... Figure 8 Only the cross-section is visible.

[0059] Therefore, designing a larger amount of steel reinforcement in the lower section of the median barrier can improve the overall structural strength. Furthermore, the bending structure of the third and fourth sections (13 and 14) at a certain height drastically reduces the thickness of the precast concrete unit 100. Thus, when a vehicle collides with the barrier, due to the vehicle's height, the impact area will strike the thinner, less reinforced upper section, while the lower section, with its better structural strength, will not deform significantly; thereby preventing damage to the vehicle and occupants during a collision.

[0060] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A median barrier, characterized in that include: If the concrete unit and several connecting components are involved; A connecting component is provided between each of the precast concrete units to connect and fix them together. Each of the precast concrete units is spliced ​​together in sequence along its own length direction and connected to form a ring structure. Each of the precast concrete units surrounds and defines a backfill trench, which is filled with gravel and soil generated during construction.

2. The central median barrier according to claim 1, characterized in that, The connecting assembly includes: a first connector and a second connector disposed on both sides of the precast concrete unit in the thickness direction, and connecting bolts; The first connector and the second connector are fitted at the joint of the two precast concrete units, and there are at least two connecting bolts, which are respectively installed through the two precast concrete units.

3. The central median barrier according to claim 2, characterized in that, The first connector is an anchoring steel bar partially embedded in the precast concrete unit, wherein the end region of the anchoring steel bar is embedded in the precast concrete unit.

4. The central median barrier according to claim 3, characterized in that, The connecting assembly also includes an anchoring steel plate, and the connecting bolt passes through the anchoring steel plate; The middle section of the anchoring steel bar is exposed outside the precast concrete unit, and the anchoring steel plate is clamped between the bolt head and the middle section of the anchoring steel bar.

5. The central median barrier according to claim 2, characterized in that, The second connector is a square hollow steel. The threaded part of the connecting bolt passes through the second connector and is fitted with a nut. The nut and the threaded part are embedded in the precast concrete unit.

6. The central median barrier according to claim 1, characterized in that, The precast concrete unit includes a steel reinforcement cage, which includes a longitudinal cage and a transverse cage. The longitudinal cage is arranged along the height direction of the precast concrete unit, and the transverse cage is arranged along the length direction of the precast concrete unit, and the two are arranged orthogonally. The longitudinal frame includes a first longitudinal frame located away from the backfill trench and a second longitudinal frame located near the backfill trench; wherein, along the height direction of the precast concrete unit, the distance between the first longitudinal frame and the second longitudinal frame is greater as they are closer to the ground.

7. The central median barrier according to claim 6, characterized in that, The first longitudinal frame is a bent structure, including a first segment parallel to the ground, a second segment extending vertically from one end of the first segment, a third segment extending vertically from the other end of the first segment, and a fourth segment extending from the end of the third segment away from the direction of the first segment. The fourth segment is inclined toward the direction of the backfill trench and is adapted to be spliced ​​with the starting segment of the second longitudinal frame.

8. The central median barrier according to claim 7 or 6, characterized in that, The steel reinforcement cage also includes a ring-shaped cage, which is constructed in a trapezoidal shape with its larger end close to the ground.

9. The central median barrier according to claim 1, characterized in that, The filling trench is provided with the following sequentially along the height direction: Support block; A sand filling layer is filled above the support block, and a gravel soil layer is filled above the sand filling layer; the precast concrete unit also has a drainage hole, with one end of the drainage hole facing the filling trench facing the sand filling layer.

10. The central median barrier according to claim 1, characterized in that, It also includes a bolster beam, which comprises two beams located below the precast concrete unit on the left and the precast concrete unit on the right, respectively.

Images