Middle division zone F-shaped low-reinforced concrete guardrail

Abstract

The utility model discloses a halving zone F-shaped low-reinforced concrete guardrail which comprises a plurality of guardrail units, the plurality of guardrail units are connected through connecting structures on the guardrail units, and M10 cement mortar is poured at the connecting positions to form a connecting layer. Each guardrail unit comprises a guardrail steel bar and a guardrail body poured outside the guardrail steel bar, the connecting mechanism comprises a connecting steel bar poured at the end of the guardrail body and C-shaped steel welded to the connecting steel bar, and H-shaped steel is inserted between every two adjacent C-shaped steel and used for combining the two guardrail units. And a cast-in-place cushion layer is arranged at the bottom of the guardrail unit. Cast-in-place curb belts are arranged on the two sides of the bottom of the guardrail unit. The three connecting steel bars are arranged along the center line of the back face of the C-shaped steel and welded to the C-shaped steel, and the other ends of the connecting steel bars are welded to the guardrail steel bars. Drainage channels are arranged in the guardrail units. The problems that the cost and the performance of an existing mid-zone F-shaped low-reinforced concrete guardrail are not considered at the same time, and meanwhile the construction efficiency is not high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of guardrails, in particular to a center-divided F-shaped low-reinforced concrete guardrail. Background Art

[0002] A central divider guardrail must be installed between the two-way lanes of the highway to prevent vehicles from driving into the opposite lane. The median concrete guardrail is mostly a split type, but in the case of a narrow roadbed, the split type guardrail is difficult to construct. For narrow roadbed sections, the integral median concrete guardrail has more advantages, but the products on the market are polarized: to ensure the strength of the guardrail, the internal reinforcement (longitudinal reinforcement + stirrups) is increased, thus ignoring the problem of high material cost; or plain concrete is used to save materials, thus ignoring the problem of high stiffness and low flexibility of the guardrail. If an accident occurs, if the guardrail concrete blocks are broken and fall into the opposite lane, it may cause a secondary accident.

[0003] Fixed formwork cast-in-place method is often used in the construction process of center-dividing concrete guardrail. If this process is used on-site, the construction efficiency will be low, the labor cost will be high, and the road will be occupied for a long time, affecting traffic safety during the operation period. Utility Model Content

[0004] The utility model aims to provide a center-dividing F-type low-reinforced concrete guardrail to solve the problem that the cost and performance of the existing center-dividing F-type low-reinforced concrete guardrail are not taken into account and the construction efficiency is low.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a center-divided F-shaped low-reinforced concrete guardrail, comprising a plurality of guardrail units, wherein the plurality of guardrail units are connected by a connecting structure on the guardrail unit, and M10 cement mortar is poured at the connection to form a connecting layer; the guardrail unit comprises guardrail steel bars and a guardrail body poured outside the guardrail steel bars, and the connecting structure comprises connecting steel bars poured at the ends of the guardrail body and C-shaped steel welded to the connecting steel bars, wherein the connection method of the C-shaped steel and the connecting steel bars can also be bolted. An H-shaped steel is inserted between two adjacent C-shaped steels, and the H-shaped steel here can be replaced by an I-shaped steel to combine the two guardrail units.

[0006] As a further improvement of the above technical solution:

[0007] A cast-in-place cushion layer is arranged at the bottom of the guardrail unit.

[0008] Cast-in-place curb strips are arranged on both sides of the bottom of the guardrail unit.

[0009] The number of the connecting steel bars is three, which are arranged along the center line of the back of the C-shaped steel and welded to the C-shaped steel, and the other end is welded to the guardrail steel bar.

[0010] The guardrail unit is provided with a drainage channel, and a PVC pipe is provided in the drainage channel for drainage.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model adopts the method of on-site assembly of prefabricated guardrail units, which is simple to construct and has high construction efficiency. It adopts 3 steel bars as longitudinal reinforcement without setting stirrups, which can save material costs while ensuring strength. It adopts the connection form of C-shaped steel + H-shaped steel to connect the longitudinal steel bars into a whole. Compared with the traditional connection method, its connection strength is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the assembly structure of the F-type low-reinforced concrete guardrail with a center dividing strip of the utility model;

[0014] Figure 2 This is a side structural diagram of the guardrail unit of the utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the guardrail unit of the utility model.

[0016] Figure numerals: 1. connecting steel bars; 10. guardrail unit; 11. drainage channel; 2. C-shaped steel; 3. guardrail body; 4. cast-in-place cushion layer; 5. cast-in-place curb strip; 6. H-shaped steel; 7. guardrail steel bars; 8. connecting layer. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate directions or positions, and the relationship is based on the directions or positional relationships shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1 As shown, the center-divided F-type low-reinforced concrete guardrail of this embodiment includes a plurality of guardrail units 10, which are connected by a connection structure on the guardrail unit 10, and M10 cement mortar is poured at the connection to form a connection layer 8; the guardrail unit 10 includes a guardrail steel bar 7 and a guardrail body 3 poured outside the guardrail steel bar 7, and the connection structure includes a connection steel bar 1 poured at the end of the guardrail body 3 and a C-shaped steel 2 welded to the connection steel bar 1, and an H-shaped steel 6 is inserted between two adjacent C-shaped steels 2 to combine the two guardrail units. Both the connection steel bar 1 and the guardrail steel bar 7 are made of HRPB400 steel bars.

[0022] like Figure 2 and Figure 3 As shown, a cast-in-place cushion layer 4 is provided at the bottom of the guardrail unit 10. Cast-in-place curb strips 5 are provided on both sides of the bottom of the guardrail unit 10. There are three connecting steel bars 1, which are arranged along the center line of the back of the C-shaped steel 2 and welded to the C-shaped steel 2, and the other end is welded to the guardrail steel bar 7. A drainage channel 11 is provided in the guardrail unit 10.

[0023] This embodiment can be processed by prefabrication and cast-in-place processes. Since the cast-in-place process needs to consider the on-site construction conditions, a combination of prefabrication and cast-in-place is usually adopted. Here, the prefabrication process of the guardrail unit 10 is introduced:

[0024] First, the C-shaped steel 2 and the connecting steel bars 1 are fully welded. Three connecting steel bars 1 are welded to each C-shaped steel 2. The welding points are located on the center line of the back of the C-shaped steel 2, and the heights from the top are 70mm, 170mm, and 270mm, respectively. After welding, the C-shaped steel 2 is positioned. The guardrail unit 10 requires 2 pieces of C-shaped steel 2, which are placed at both ends, and then the guardrail steel bars 7 (3 pieces) are welded to the connecting steel bars 1 at the same height. The PVC drain pipe is positioned, that is, the drainage channel 11 is positioned, and formwork casting and formwork removal and maintenance are performed to obtain the guardrail unit 10. The guardrail body 3 is cast with C30 concrete.

[0025] After the prefabricated guardrail unit 10 is transported to the site, C25 concrete must be poured as the cast-in-place cushion layer 4. If pipelines need to be buried in the future, the position of the pipelines can be reserved; the prefabricated guardrail unit 10 is placed on the cast-in-place cushion layer 4, the guardrail unit 10 is spaced 20mm apart, H-shaped steel 6 is inserted and sealed with cement mortar to form a connection layer 8, and then C25 concrete is poured as the cast-in-place curb strip 5. The guardrail unit 10 of this embodiment uses 3 steel bars as longitudinal bars without stirrups, saving material costs; the connection structure uses the connection form of C-shaped steel + H-shaped steel, so that the longitudinal steel bars are connected as a whole, which can improve construction efficiency when the prefabrication process is used.

[0026] The above is only an embodiment of the utility model, and the common sense such as the known specific structure and characteristics in the scheme is not described too much here. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A mid-divided F-type low-reinforced concrete guardrail, characterized in that: The invention comprises a plurality of guardrail units (10), wherein the plurality of guardrail units (10) are connected via a connection structure on the guardrail unit (10), and M10 cement mortar is poured at the connection to form a connection layer (8); the guardrail unit (10) comprises a guardrail steel bar (7) and a guardrail body (3) poured outside the guardrail steel bar (7); the connection structure comprises a connection steel bar (1) poured at the end of the guardrail body (3) and a C-shaped steel (2) welded to the connection steel bar (1); an H-shaped steel (6) is inserted between two adjacent C-shaped steels (2) to connect the two guardrail units.

2. The center-divided F-type low-reinforced concrete guardrail according to claim 1 is characterized by: A cast-in-place cushion layer (4) is provided at the bottom of the guardrail unit (10).

3. The center-divided F-type low-reinforced concrete guardrail according to claim 2 is characterized by: Cast-in-place curb strips (5) are arranged on both sides of the bottom of the guardrail unit (10).

4. The center-divided F-type low-reinforced concrete guardrail according to any one of claims 1 to 3, characterized in that: The number of the connecting steel bars (1) is three, which are arranged along the center line of the back side of the C-shaped steel (2) and are welded to the C-shaped steel (2), and the other ends are welded to the guardrail steel bars (7).

5. The center-divided F-type low-reinforced concrete guardrail according to claim 4 is characterized by: A drainage channel (11) is provided in the guardrail unit (10).

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