阅读说明：本技术 一种大桥钢护栏及其施工方法 (Bridge steel guardrail and construction method thereof ) 是由 曹洁 张强 徐鹏 谢培娟 高威 于 2020-12-24 设计创作，主要内容包括：本申请涉及一种大桥钢护栏及其施工方法,属于桥梁护栏的技术领域,其包括混凝土底座和固定在混凝土底座上的护栏本体,护栏本体包括沿桥梁长度方向间隔设置的立柱、内侧横杆、外侧横杆；立柱与桥梁固定连接并浇筑在混凝土底座内,外侧横杆长度方向的两端与立柱固定连接；内侧横杆设置两根并分别与顶端外侧横杆和底端外侧横杆水平相对,内侧横杆与外侧横杆之间利用缓冲组件连接,内侧横杆穿过立柱并能够向外侧横杆的方向运动；内侧横杆之间设置有连接柱,连接柱套设有与连接柱转动连接的旋转桶。本申请通过将桥梁栏杆设置成双层并在两层之间增加缓冲组件,将车辆行驶的撞击能量吸收,能够有效提高桥梁栏杆的缓冲效果,保证车辆的安全。(The application relates to a bridge steel guardrail and a construction method thereof, belonging to the technical field of bridge guardrails, and comprising a concrete base and a guardrail body fixed on the concrete base, wherein the guardrail body comprises upright posts, inner side cross rods and outer side cross rods which are arranged at intervals along the length direction of a bridge; the upright posts are fixedly connected with the bridge and poured in the concrete base, and two ends of the outer cross rod in the length direction are fixedly connected with the upright posts; the two inner side cross rods are horizontally opposite to the top end outer side cross rod and the bottom end outer side cross rod respectively, the inner side cross rods are connected with the outer side cross rods through the buffer assemblies, and the inner side cross rods penetrate through the stand columns and can move in the direction of the outer side cross rods; a connecting column is arranged between the inner side cross rods, and a rotating barrel rotatably connected with the connecting column is sleeved on the connecting column. This application is through setting the bridge railing to the bilayer and increase the buffering subassembly between two-layer, with the impact energy absorption that the vehicle went, can effectively improve the buffering effect of bridge railing, guarantees the safety of vehicle.)

1. The utility model provides a bridge steel guardrail, includes concrete base (1) and fixes guardrail body (2) on concrete base (1), its characterized in that: the guardrail body (2) comprises upright posts (21), inner side cross rods (22) and outer side cross rods (23) which are arranged at intervals along the length direction of the bridge; the upright posts (21) are fixedly connected with the bridge and poured in the concrete base (1); two ends of the outer cross rod (23) in the length direction are fixedly connected with the upright post (21) and at least two ends are arranged up and down; the two inner side cross rods (22) are arranged and are respectively horizontally opposite to the top end outer side cross rod (23) and the bottom end outer side cross rod (23); the inner side cross bar (22) and the outer side cross bar (23) are connected through a buffer assembly (24), and a plurality of buffer assemblies (24) are arranged at intervals along the length direction of the inner side cross bar (22); the inner cross bar (22) penetrates through the upright post (21) and can move in the direction of the outer cross bar (23); a connecting column (31) penetrating through the upper inner side cross rod and the lower inner side cross rod (22) is arranged between the inner side cross rods (22); the part cover that spliced pole (31) are located between relative inboard horizontal pole (22) is equipped with rotatory bucket (32) of being connected with spliced pole (31) rotation, anticollision subassembly (3) set up a plurality ofly along the length direction interval of inboard horizontal pole (22).

2. The bridge steel guardrail of claim 1, wherein: the buffer assembly (24) comprises a first buffer spring (242) fixedly connected with the inner side cross rod (22) and the outer side cross rod (23) respectively.

3. The bridge steel guardrail of claim 2, wherein: first buffer spring (242) cover is established on first connecting bolt (241), first connecting bolt (241) and inboard horizontal pole (22) fixed connection, first connecting bolt (241) pass outside horizontal pole (23) and with outside horizontal pole (23) sliding connection, one end threaded connection that first connecting bolt (241) are located outside horizontal pole (23) outside has adjusting nut (243).

4. The bridge steel guardrail of claim 1, wherein: the upright post (21) is provided with a second connecting bolt (244) penetrating through the inner side cross rod (22), and a second buffer spring (245) is sleeved between the positions, opposite to the inner surfaces of the inner side cross rod (22) and the upright post (21), of the second connecting bolt (244).

5. The bridge steel guardrail of claim 1, wherein: the rotary barrel (32) comprises a barrel body which is rotatably connected with the connecting column (31) and a rubber outer layer (324) which is sleeved on the outer surface of the barrel body, and a ring groove is formed in the surface of the rubber outer layer (324).

6. The bridge steel guardrail of claim 5, wherein: the barrel body is hollow, and a plurality of layers of corrugated steel plates (323) are arranged between the inner wall (321) and the outer wall (322) of the barrel body.

7. The bridge steel guardrail of claim 1, wherein: and outer side vertical rods arranged at intervals along the length direction of the outer side transverse rods (23) are fixedly arranged between the outer side transverse rods (23).

8. A construction method of a bridge steel guard rail according to any one of claims 1 to 7, wherein the method comprises:

s1, mounting the upright posts, fixing upright post flanges (211) at the bottom ends of the upright posts (21), pre-burying threaded steel bars in the bridge, penetrating through bolt holes of the upright post flanges (211), and fixing the upright post flanges (211) on the bridge by using nuts;

s2, pouring a concrete base, embedding base steel bars (11) in the bridge, fixing the upright posts (21), and then pouring the concrete base (1) through a rear formwork;

s3, mounting an inner side cross bar and an outer side cross bar, fixedly connecting the outer side cross bar (23) with the upright post (21), and then connecting the inner side cross bar (22) to the outer side cross bar (23) by using a buffer assembly (24);

s4, mounting the rotary barrel, placing the rotary barrel (32) between the opposite inner side cross bars (22), then passing the connecting column (31) through the opposite inner side cross bars (22) and the rotary barrel (32), and fixedly connecting the connecting column (31) with the inner side cross bars (22).

9. The construction method of the bridge steel guard rail according to claim 8, wherein: at S1, the nuts on the reinforcing bars are tightened, and the top ends of the reinforcing bars are bent and bound to the base reinforcing bars (11).

10. The construction method of the bridge steel guard rail according to claim 8, wherein: in S4, both ends of the connecting column (31) are provided as threaded sections, and then the connecting column (31) is fixed to the opposite inside rails (22) by nuts.

Technical Field

The application relates to the field of bridge guardrails, in particular to a bridge steel guardrail and a construction method thereof.

Background

The bridge guardrail is a guardrail arranged on a bridge, and aims to prevent an out-of-control vehicle from crossing the bridge and have the functions of preventing the vehicle from breaking through, penetrating downwards, crossing the bridge and beautifying the bridge building. The bridge guardrail has two main forms, namely a concrete structure and a steel structure. With the rapid development of urban road traffic in China, various viaducts, overpasses, river-crossing bridges and valley-crossing bridges appear in large numbers, and although the problems of traffic jam and congestion at the level crossing of the plane overpass are greatly relieved, a plurality of potential safety hazards also exist. In most cases, when an accident occurs, a vehicle is in a high-speed driving process and therefore is in an out-of-control state, and inevitably impacts a guard rail of a bridge to select the bridge guard rail, so that safety is a primary consideration.

The prior Chinese patent application with publication number CN109958055A discloses a bridge steel guardrail, which comprises a main body, wherein a guardrail body is arranged on the right side of the lower part of the main body, a connecting and inserting column is connected to the left side of the lower part of the guardrail body, a bolt is fixed to the lower part of the connecting and inserting column, buckles are connected to the left side and the right side of the lower part of the bolt, a steel rod is arranged on the right side of the upper part of each buckle, a rain-proof cap is arranged on the right side of the upper part of the steel rod, a guardrail is fixed to the right side of the lower part of the rain-proof cap, a movable advertising board is arranged on the right side of the lower part of the guardrail, threads are connected to the right side of the lower part of the threads, a warning sticker is fixed to the left side of the lower part of the warning sticker, impact-proof.

In view of the above-mentioned related art, the inventor believes that there is a drawback in that the buffering effect is poor, and energy is not absorbed well when a vehicle hits a balustrade.

Disclosure of Invention

In order to improve the buffering effect of bridge railings, the application provides a bridge steel guardrail and a construction method thereof.

On the one hand, the application provides a bridge steel guardrail adopts following technical scheme:

a bridge steel guardrail comprises a concrete base and a guardrail body fixed on the concrete base, wherein the guardrail body comprises upright posts, inner side cross rods and outer side cross rods which are arranged at intervals along the length direction of a bridge; the upright posts are fixedly connected with the bridge and poured in the concrete base; two ends of the outer cross rod in the length direction are fixedly connected with the upright posts, and at least two outer cross rods are arranged up and down; the two inner side cross rods are horizontally opposite to the top end outer side cross rod and the bottom end outer side cross rod respectively; the inner side cross rods are connected with the outer side cross rods through buffer assemblies, and a plurality of buffer assemblies are arranged at intervals along the length direction of the inner side cross rods; the inner cross rod penetrates through the upright post and can move towards the outer cross rod; a connecting column penetrating through the upper inner side cross rod and the lower inner side cross rod is arranged between the inner side cross rods; the part cover that the spliced pole is located between the relative inboard horizontal pole is equipped with the rotatory bucket of being connected with the spliced pole rotation, anticollision subassembly sets up a plurality ofly along the length direction interval of inboard horizontal pole.

By adopting the technical scheme, the buffer assembly and the rotary barrel are utilized to carry out double protection on the out-of-control automobile, and when the automobile impacts the guardrail, the rotary barrel rotates to disperse impact force under the action of the impact force; the inboard horizontal pole removes to the outside horizontal pole, and the buffer assembly between inboard horizontal pole and the outside horizontal pole can play further cushioning effect to improve the buffering effect of guardrail greatly, played good guard action to the vehicle out of control.

Preferably, the buffering assembly comprises a first buffering spring fixedly connected with the inner side cross bar and the outer side cross bar respectively.

Through adopting above-mentioned technical scheme, set up first buffer spring between inboard horizontal pole and outside horizontal pole, when the vehicle strikeed the guardrail, inboard horizontal pole compression first buffer spring to play the buffering effect.

Preferably, first buffer spring cover is established on first connecting bolt, first connecting bolt and inboard horizontal pole fixed connection, first connecting bolt pass the outside horizontal pole and with outside horizontal pole sliding connection, the one end threaded connection that first connecting bolt is located the outside horizontal pole outside has adjusting nut.

By adopting the technical scheme, the buffer assembly is more stable, and when a vehicle is impacted, the first buffer spring is compressed while the first connecting bolt slides from the outer side cross rod, so that the buffer effect is not influenced; and, utilize the adjusting nut can adjust the distance between inboard horizontal pole and the outside horizontal pole to adjust first buffer spring to the most suitable degree.

Preferably, the stand is provided with a second connecting bolt penetrating through the inner side cross rod, and a second buffer spring is sleeved between the inner side cross rod and the position, opposite to the inner surface of the inner side cross rod, of the second connecting bolt.

Through adopting above-mentioned technical scheme for inboard horizontal pole is more stable when the stand internal motion.

Preferably, the rotating barrel comprises a barrel body rotationally connected with the connecting column and a rubber outer layer sleeved on the outer surface of the barrel body, and an annular groove is formed in the surface of the rubber outer layer.

Through adopting above-mentioned technical scheme, when the vehicle striking, the rubber skin can take place deformation when rotatory bucket rotates, further plays the cushioning effect.

Preferably, the barrel body is hollow, and a plurality of layers of corrugated steel plates are arranged between the inner wall and the outer wall of the barrel body.

Through adopting above-mentioned technical scheme, corrugated steel plate also can take place the deformation of certain degree when the vehicle striking when guaranteeing that the staving has certain intensity, plays the buffering effect.

Preferably, outer side vertical rods arranged at intervals along the length direction of the outer side transverse rods are fixedly arranged between the outer side transverse rods.

By adopting the technical scheme, the outer side protection range of the guardrail is larger, and the safety of the guardrail is improved.

On the other hand, the construction method of the bridge steel guardrail provided by the application adopts the following technical scheme:

a construction method of a bridge steel guardrail comprises the following steps:

s1, mounting the upright posts, fixing upright post flanges at the bottom ends of the upright posts, embedding threaded steel bars in the bridge, penetrating through bolt holes of the upright post flanges, and fixing the upright post flanges on the bridge by using nuts;

s2, pouring a concrete base, embedding base steel bars in the bridge, fixing the upright posts, and then pouring the concrete base through a formwork;

s3, mounting an inner side cross bar and an outer side cross bar, fixedly connecting the outer side cross bar with the upright post, and then connecting the inner side cross bar with the outer side cross bar by using a buffer assembly;

and S2, mounting the rotary barrel, placing the rotary barrel between the opposite inner side cross bars, and then enabling the connecting column to penetrate through the opposite inner side cross bars and the rotary barrel to be fixedly connected with the inner side cross bars.

Through adopting above-mentioned technical scheme, accomplish the installation of guardrail, the stand utilizes flange joint when pouring with the bridge with the concrete base, has improved the stability of stand, has strengthened the shock strength of stand.

Preferably, in S1, the nuts on the reinforcing bars are tightened, and then the top ends of the reinforcing bars are bent and tied to the reinforcing bars of the base.

By adopting the technical scheme, the connection strength between the upright post and the bridge and between the upright post and the concrete base is higher after the concrete base is poured.

Preferably, in S2, both ends of the connecting column are provided as threaded sections, and then the connecting column is fixed to the opposite inside rails using nuts.

By adopting the technical scheme, the installation of the connecting column is facilitated, and the construction speed is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the rotary barrel is arranged between the inner side cross rods of the guardrail, and the buffer assembly is arranged between the inner side cross rods and the outer side cross rods, so that double buffering can be provided for the guardrail, and the buffering capacity of the guardrail is greatly improved;

2. the outer side of the rotary barrel is arranged to be the rubber outer layer, so that the buffering effect of the guardrail is further enhanced;

3. through utilizing flange joint and pouring concrete base with stand and bridge, improved the stability of stand, guaranteed the shock resistance of stand.

Drawings

Fig. 1 is a schematic overall structure diagram of a bridge steel guardrail according to an embodiment of the application.

Fig. 2 is a connection structure of a column and a concrete base of a bridge steel guardrail according to an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a buffering assembly of a bridge steel guardrail according to an embodiment of the application.

Fig. 4 is a cross-sectional structural schematic view of a bumper assembly in an embodiment of the present application.

Description of reference numerals: 1. a concrete base; 11. base reinforcing steel bars; 12. a post hole; 2. a guardrail body; 21. a column; 211. a column flange; 22. an inboard cross bar; 23. an outboard cross bar; 24. a buffer assembly; 241. a first connecting bolt; 242. a first buffer spring; 243. adjusting the nut; 244. a second connecting bolt; 245. a second buffer spring; 25. connecting holes; 3. an anti-collision assembly; 31. connecting columns; 32. rotating the barrel; 321. an inner wall; 322. an outer wall; 323. a corrugated steel plate; 324. and a rubber outer layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses bridge steel guardrail. Referring to fig. 1 and 2, the bridge steel guardrail comprises a concrete base 1 and a guardrail body 2 positioned above the concrete base 1.

The concrete base 1 is arranged along the full length of the bridge and is made of reinforced concrete. The base steel bar 11 of the concrete base 1 is embedded in the bridge. Square column holes 12 are formed in the top face of the concrete base 1 at intervals along the length direction, and the column holes 12 penetrate through the concrete base 1 to be in contact with the bridge deck of the bridge.

The guardrail body 2 includes a post 21, an inboard rail 22, an outboard rail 23 and a bumper assembly 24 positioned between the inboard rail 22 and the outboard rail 23. The bottom of the upright post 21 is matched with the upright post 21 and can be inserted into the post hole 12. A column flange 211 is fixed to the bottom end of the column 21. Threaded steel bars opposite to the bolt holes of the upright column flanges 211 are pre-embedded in the bridge. The columns 21 are fixed to the bridge by nuts matching the threaded reinforcing bars. The top end of the twisted steel bar is bent and bound with the steel bar of the concrete base 1.

During construction, the upright post 21 is fixed on the surface of a bridge, and then the concrete base 1 is poured, so that the connection strength of the upright post 21 and the bridge is ensured.

The upper and lower parts of the upright post 21 are respectively provided with a connecting hole 25 along the length direction of the bridge. The inside rail 22 and the outside rail 23 each pass through the attachment hole 25 and engage with the attachment hole 25. A distance is left between the inner crossbar 22 and the outer crossbar 23.

Referring to fig. 1 and 3, the bumper assembly 24 includes a first connecting pin 241 between the opposing outer and inner crossbars 23 and 22. The plurality of the buffer members 24 are provided at equal intervals along the longitudinal direction of the inner and outer side rails 22 and 23. The first connecting bolt 241 is fixedly connected with the inner side cross bar 22, and the first connecting bolt 241 penetrates through the outer side cross bar 23 and is connected with the outer side cross bar 23 in a sliding manner. An adjusting nut 243 is threadedly coupled to one end of the first coupling bolt 241 penetrating the outer lateral bar 23.

A first buffer spring 242 is sleeved on a portion of the first connecting bolt 241 between the inner lateral rod 22 and the outer lateral rod 23. Both ends of the first buffer spring 242 in the length direction are fixedly connected to the inner side cross bar 22 and the outer side cross bar 23, respectively. The first buffer spring 242 is externally sleeved with a plastic sleeve (not shown).

The outer cross bar 23 and the upright 21 are fixedly connected, and may be welded or bolted.

The pillar 21 is provided with a second coupling bolt 244 passing through the inner rail 22 and the outer rail 23 in this order. The second connecting bolt 244 is fixedly connected with the vertical side wall of the connecting hole 25 near the inner side cross bar 22. The second connecting bolt 244 passes through the inner cross bar 22, the outer cross bar 23 and the connecting hole 25 near the vertical side wall of the outer cross bar 23 and is connected with the inner cross bar 22, the outer cross bar 23 and the upright post 21 in a sliding way.

The second connecting bolt 244 is threaded with a nut through the end of the upright 21 that extends outside the upright 21.

The inner side cross bar 22 is spaced apart from the vertical side wall of the connecting hole 25 and is provided with a second buffer spring 245 sleeved on the second connecting bolt 244. Two ends of the second buffer spring 245 in the length direction are respectively and fixedly connected with the vertical side wall of the connecting hole 25 and the inner side cross bar 22.

Referring to fig. 3 and 4, the crash module 3 is disposed between the upper and lower opposite inside rails 22. The bumper assemblies 3 are spaced apart along the length of the inboard cross bar 22. The anti-collision assembly 3 comprises a connecting column 31 vertically penetrating through the upper and lower inner side rails 22 and a rotating barrel 32 positioned between the upper and lower inner side rails 22 and surrounding the connecting column 31. The connecting post 31 has threaded ends at both ends in the longitudinal direction and is fixed to the inner rail 22 by nuts. A gasket is provided between the inside rail 22 and the rotary tub 32.

The rotating barrel 32 is hollow and the inner wall 321 is closely attached to the connecting column 31, and a corrugated steel plate 323 is fixedly arranged between the inner wall 321 and the outer wall 322 of the rotating barrel 32. The outer side of the outer wall 322 of the rotary tub 32 is sleeved with an outer rubber layer 324. The outer surface of the rubber outer layer 324 is provided with ring grooves spaced up and down.

An outer vertical bar is arranged between the opposite outer cross bars 23. The outer side vertical bars are equidistantly arranged along the length direction of the outer side cross bar 23.

The implementation principle of bridge steel guardrail of this application embodiment does: when the vehicle was out of control and strikes the guardrail, rotatory bucket 32 was rotatory and takes place deformation, and inboard horizontal pole 22 is close to outside horizontal pole 23 simultaneously, under rotatory bucket 32 and buffer assembly 24's effect, cushions the power that the vehicle striking produced to alleviate the vehicle and damage, can effectively improve buffering effect, protect the vehicle out of control.

The embodiment of the application discloses a construction method of a bridge steel guardrail. Referring to the drawings, the construction method of the bridge guard rail includes:

s1, mounting of upright post

And after the strength of the bridge meets the requirement, measuring and setting out, and installing the upright post 21. During installation, the threaded steel bars pre-embedded in the bridge penetrate through the bolt holes of the upright post flanges 211 and are connected with the upright post flanges 211 and the bridge through nuts. And then bending the top end of the twisted steel bar and binding the top end of the twisted steel bar with the base steel bar 11 pre-buried in the bridge.

S2, pouring the concrete base

And (5) erecting the formwork to pour the concrete base 1, and maintaining after pouring is finished.

S3, inner rail and outer rail mounting

The outboard cross bar 23 is connected to the outboard vertical bar and then the outboard cross bar 23 is connected to the inboard cross bar 22 using the bumper assembly 24.

The outer cross bar 23 and the inner cross bar 22 are inserted through the connecting holes 25 of the upright posts 21, and the outer cross bar 23 is welded to the upright posts 21

The second buffer spring 245 is placed between the inner side rail 22 and the vertical sidewall of the coupling hole 25 and the second coupling bolt 244 passes through the pillar 21, the outer side rail 23 and the inner side rail 22 in order. The second connecting bolt 244 is then welded to the vertical side wall of the connecting bore 25 adjacent the inboard cross bar 22 and a nut is screwed onto the end of the second connecting bolt 244 outboard of the upright 21. The second buffer spring 245 is welded to the vertical sidewall of the coupling hole 25 and the inner side rail 22.

The distance between the inner and outer rails 22 and 23 is adjusted by the adjusting nut 243 of the first connecting bolt 241 as necessary to put the first buffer spring 242 between the inner and outer rails 22 and 23 in an appropriate state.

S4 mounting anti-collision assembly

The rotating tub 32 is interposed between the opposite inside rails 22 and the connecting column 31 is passed through the opposite inside rails 22 and the rotating tub 32 positioned between the inside rails 22. And then nuts on two sides of the connecting column 31 are screwed down, and the anti-collision assembly 3 is installed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.