CN210636352U

CN210636352U - Prefabricated anti-collision guardrail

Info

Publication number: CN210636352U
Application number: CN201921327976.4U
Authority: CN
Inventors: 蓝文亮; 陈亮; 陈小江; 彭兴宇; 陈客贤
Original assignee: Xiamen Zhongping Highway Survey And Design Institute Co ltd
Current assignee: Xiamen Zhongping Highway Survey And Design Institute Co ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-05-29
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses a prefabricated crash barrier belongs to crash barrier technical field, including the multistage guardrail body, have the movement joint between two sections adjacent guardrail bodies, the guardrail body is including leveling layer, prefabricated guardrail and cast-in-place section, and prefabricated guardrail is through cast-in-place section and girder fixed connection, and cast-in-place section sets up in the lower part of prefabricated guardrail and is located the one side that is close to the lane, and the leveling layer sets up the top at the girder, and the bottom of prefabricated guardrail supports at the top on leveling layer, and the top surface of each section prefabricated guardrail all is in on same horizontal plane. The utility model discloses a prefabricated crash barrier can shorten construction cycle greatly through prefabricated and cast-in-place combination, sets up leveling layer, improves crash barrier top surface dislocation phenomenon.

Description

Prefabricated anti-collision guardrail

Technical Field

The utility model belongs to the technical field of anticollision barrier, especially, relate to a prefabricated anticollision barrier.

Background

To anticollision barrier, prior art adopts whole cast-in-place structure more, and whole cast-in-place still produces following problem except that the work load is great easily: (1) the concrete pouring and vibrating are not easy to operate, and particularly the control problem of the reinforcing steel bar protective layer is solved, although various methods are used for controlling the reinforcing steel bar protective layer, the qualification rate can only reach about 70%. (2) When the outer template of guardrail is torn open to ann, the workman all needs high altitude construction, also has the safety risk of falling object during the installation of outer template. (3) The wall through holes need to be formed when the inner steel template and the outer steel template are fixed, and after construction is finished, each through hole needs to be plugged, so that the outer wall is not attractive. (4) The dripping eave is small in size, so that the dripping eave is easily damaged when the outer template is detached. The anti-collision guardrail adopting the cast-in-place structure has the advantages of low construction efficiency, long period, poor quality and high risk of overhead operation. Along with the technical development, there is a little prefabricated crashproof guardrail of assembling at present, but assembles the wrong platform easily and leads to the guardrail top surface dislocation.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to solve the technical problem that a prefabricated crash barrier is provided can shorten construction period greatly through prefabricated and cast-in-place combination, sets up leveling layer, improves crash barrier top surface dislocation phenomenon.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a pair of prefabricated crash barrier, including the multistage guardrail body, have the movement joint between two sections adjacent guardrail bodies, the guardrail body is including leveling layer, prefabricated guardrail and cast-in-place section, and prefabricated guardrail is through cast-in-place section and girder fixed connection, and cast-in-place section setting just is located the one side that is close to the lane in the lower part of prefabricated guardrail, and the leveling layer sets up the top at the girder, and the bottom of prefabricated guardrail supports at the top on leveling layer, and the top surface of each section prefabricated guardrail all is in on same horizontal plane.

Preferably, every section of prefabricated guardrail comprises the concrete prefabrication, and the inside of every section of prefabricated guardrail is all pre-buried has the reinforcing bar group, and the inside of cast-in-place section is provided with first longitudinal reinforcement, and the inside and the first longitudinal reinforcement fixed connection of cast-in-place section are all extended to some of every reinforcing bar group, first longitudinal reinforcement and the pre-buried reinforcing bar fixed connection of the girder that extends the girder top.

Preferably, reinforcing bar group is including connecting reinforcement and atress reinforcing bar, and it is fixed with first vertical reinforcement ligature that prefabricated guardrail is extended to connecting reinforcement's lower part, and it is fixed with first vertical reinforcement ligature that the lower part of atress reinforcing bar extends prefabricated guardrail.

Preferably, the reinforcing bar group also includes second longitudinal reinforcing bar and horizontal reinforcing bar, and every top of horizontal reinforcing bar all is equipped with two second longitudinal reinforcing bars.

Preferably, one side wall of the prefabricated guardrail is arc-shaped, and the other side wall of the prefabricated guardrail is provided with a bending surface.

Preferably, the prefabricated guard rail has a length of 4-6 m.

Preferably, the length of the deformation joint is 0.5-1.5 cm.

Preferably, the leveling layer comprises a plurality of leveling cushion blocks and a leveling mortar layer, the leveling cushion blocks are placed at the top of the main beam, the bottom of the prefabricated guardrail abuts against the tops of the leveling cushion blocks, and the leveling mortar layer connects the leveling cushion blocks into a whole.

Preferably, the leveling pads are arranged one by one at intervals of 20 cm.

Preferably, the deformation joints are closed with cement mortar.

The utility model has the advantages that:

1. the structural form of partial prefabrication and partial cast-in-place is adopted, so that the use function requirement of the anti-collision guardrail can be met, and the anti-collision guardrail can be quickly, safely and effectively installed.

2. The arrangement of the leveling layer improves the dislocation phenomenon of the top surface of the prefabricated guardrail.

3. The structure has simple process, is beneficial to improving the construction quality and reducing the potential safety hazard of high-altitude operation.

Drawings

Fig. 1 is a schematic elevation view of the present invention.

Fig. 2 is a schematic cross-sectional view of the present invention.

Fig. 3 is a schematic view of the temporary support of the present invention.

Fig. 4 is a schematic cross-sectional view of the steel bar of the present invention.

Fig. 5 is an enlarged schematic view of a in fig. 4.

The labels in the figures are: 1-leveling layer, 2-prefabricated guardrail, 3-cast-in-place section, 4-deformation joint, 5-main beam, 6-steel bar group, 61-connecting steel bar, 62-stressed steel bar, 63-second longitudinal steel bar, 64-transverse steel bar, 7-first longitudinal steel bar and 8-embedded steel bar.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Those not described in detail in this specification are within the skill of the art. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on those shown in fig. 1, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1 to 5, the prefabricated crash barrier provided in this embodiment includes a plurality of sections of barrier bodies, a deformation joint 4 is provided between two adjacent sections of barrier bodies, each barrier body includes a leveling layer 1, a prefabricated barrier 2, and a cast-in-place section 3, each prefabricated barrier 2 is fixedly connected to a main beam 5 through the cast-in-place section 3, the cast-in-place section 3 is disposed at a lower portion of the prefabricated barrier 2 and is located at a side close to a traffic lane, in this embodiment, a side close to the traffic lane is a left side, the leveling layer 1 is disposed at a top of the main beam 5, a bottom of the prefabricated barrier 2 abuts against a top of the leveling layer 1, top surfaces of the prefabricated barriers 2 are located at a same horizontal plane, the leveling layer 1 is located at a right side of the cast-in-place section 3, each prefabricated barrier 2 is prefabricated by concrete, a reinforcement group 6 is pre-buried inside each prefabricated barrier 2, a first longitudinal reinforcement 7 is disposed inside the, part of every reinforcing bar group 6 all extends to cast-in-place section 3's inside and first longitudinal reinforcement 7 fixed connection, first longitudinal reinforcement 7 and the pre-buried reinforcing bar 8 fixed connection of the girder 5 that extends the girder 5 top, and is specific, reinforcing bar group 6 is including connecting reinforcement 61 and atress reinforcing bar 62, and prefabricated guardrail 2 and the ligature of first longitudinal reinforcement 7 are extended to the lower part of connecting reinforcement 61 fixed, and the ligature of prefabricated guardrail 2 and first longitudinal reinforcement 7 is extended to the lower part of atress reinforcing bar 62 fixed.

Considering the hoisting capacity and operability of the on-site hoisting equipment, the length meeting the standard stress requirement and the influence of the radius of the bridge curve, each section of the prefabricated guardrail 2 is set as: for the radius of the bridge curve is less than 50m, the length of the prefabricated guardrail 2 is set to be 4m (the weight is about 4 t); for bridge curves with radius larger than 50m, the length of the prefabricated guard rail 2 is set to be 4-6m (straight line segment), and for straight bridges, the length of the prefabricated guard rail 2 is set to be 6m (weight of about 6 t). For the deformation joint 4 between each section of guardrail body, considering the whole stress performance of the structure and the requirement of beautiful appearance on the shape, the width of the deformation joint 4 is set to be 1cm in the embodiment.

In this embodiment, the width of the cast-in-place section 3 is 40cm, and the height thereof is 18 cm.

And after the first longitudinal steel bars 7 and the embedded steel bars 8 of the main beam 5, the connecting steel bars 61 and the stressed steel bars 62 are bound, welding, then performing self-compacting concrete pouring on the cast-in-place section 3 and sealing the deformation joint 4 by adopting cement mortar, and achieving the quick installation effect of combining prefabrication and cast-in-place.

The structural form of adopting partial prefabrication and partial cast-in-place can satisfy crash barrier's service function requirement, again can quick safe effectual installation, not only accords with the enterprise energy-conservation, reduces environmental pollution, cost reduction increase's requirement, and has solved construction obstacle problems such as the cost of labor height and artifical shortage. And the safety of the main structure of the bridge is not adversely affected, the construction period is short, the process is simple, and the construction quality is favorably improved. The production efficiency and the construction quality are improved, and the potential safety hazard of overhead operation is reduced. The cast-in-place section 3 is good in overall stress, capable of preventing water and improving durability, and poor assembling durability and unreasonable stress caused by guardrail flooding are overcome.

Further, reinforcing bar group 6 still includes second longitudinal reinforcement 63 and horizontal reinforcing bar 64, and every horizontal reinforcing bar 64's top all is equipped with two second longitudinal reinforcement 63, improves prefabricated guardrail 2's crashworthiness through the setting of second longitudinal reinforcement 63 and horizontal reinforcing bar 64.

Furthermore, one side wall of the prefabricated guardrail 2 is arc-shaped, the other side wall of the prefabricated guardrail 2 is provided with a bending surface, and the bending surface has good anti-collision capacity.

Further, the leveling layer 1 comprises a plurality of leveling cushion blocks and a leveling mortar layer (not shown), the leveling cushion blocks are placed at the top of the main beam, the bottoms of the prefabricated guardrails abut against the tops of the leveling cushion blocks, the leveling mortar layer connects the leveling cushion blocks into a whole, and specifically, one leveling cushion block is arranged at intervals of 20 cm.

And prefabricating the anti-collision guardrail into the corresponding prefabricated guardrail 2 in the prefabricated beam yard according to requirements, and transporting the prefabricated guardrail to the site. The top of the main beam 5 is pre-provided with a leveling cushion block, a leveling mortar layer is smeared, the height of the leveling cushion block is correspondingly arranged according to the gradient of the bridge floor, the leveling mortar layer is as high as the leveling cushion block, after the leveling cushion block is placed, the prefabricated guardrail 2 is hung to a corresponding position, one side of the prefabricated guardrail is supported by the leveling cushion block, and the other side of the prefabricated guardrail is temporarily supported by a triangular support. The prefabricated guardrail 2 is at the same height by adjusting the triangular supports and the leveling cushion blocks, and the arrangement of the leveling layer 1 improves the top surface dislocation phenomenon of the prefabricated guardrail 2.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a prefabricated crash barrier which characterized in that:

the guardrail comprises a plurality of sections of guardrail bodies, wherein a deformation joint is arranged between two adjacent sections of guardrail bodies;

the guardrail body comprises a leveling layer, a prefabricated guardrail and a cast-in-place section;

the prefabricated guardrail is fixedly connected with the main beam through the cast-in-place section, and the cast-in-place section is arranged at the lower part of the prefabricated guardrail and is positioned at one side close to the traffic lane;

the leveling layer is arranged at the top of the main beam, and the bottom of the prefabricated guardrail is abutted against the top of the leveling layer;

the top surfaces of the prefabricated guardrails of all the sections are positioned on the same horizontal plane.

2. The prefabricated crash barrier of claim 1, wherein:

each section of the prefabricated guardrail is formed by prefabricating concrete, and a steel bar group is pre-embedded in each section of the prefabricated guardrail;

a first longitudinal steel bar is arranged inside the cast-in-place section;

a part of each steel bar group extends to the interior of the cast-in-place section and is fixedly connected with the first longitudinal steel bar;

the first longitudinal steel bars are fixedly connected with the embedded steel bars of the main beam extending out of the top of the main beam.

3. The prefabricated crash barrier of claim 2, wherein:

the steel bar group comprises connecting steel bars and stressed steel bars;

the lower part of the connecting steel bar extends out of the prefabricated guardrail to be bound and fixed with the first longitudinal steel bar;

the lower part of the stressed steel bar extends out of the prefabricated guardrail to be bound and fixed with the first longitudinal steel bar.

4. The prefabricated crash barrier of claim 3, wherein:

the steel bar group also comprises a second longitudinal steel bar and a transverse steel bar;

and two second longitudinal steel bars are arranged above each transverse steel bar.

5. The prefabricated crash barrier of claim 1, wherein:

one side wall of the prefabricated guardrail is in an arc shape, and the other side wall of the prefabricated guardrail is provided with a bending surface.

6. The prefabricated crash barrier of claim 1, wherein:

the length of the prefabricated guardrail is 4-6 m.

7. The prefabricated crash barrier of claim 1, wherein:

the length of the deformation joint is 0.5-1.5 cm.

8. The prefabricated crash barrier of claim 1, wherein:

the leveling layer comprises a plurality of leveling cushion blocks and a leveling mortar layer;

the leveling cushion block is placed at the top of the main beam, and the bottom of the prefabricated guardrail is abutted against the top of the leveling cushion block;

the leveling mortar layer connects the leveling cushion blocks into a whole.

9. The prefabricated crash barrier of claim 8, wherein:

the leveling cushion blocks are arranged one by one at intervals of 20 cm.

10. The prefabricated crash barrier of claim 1, wherein:

and the deformation joint is sealed by cement mortar.