CN105544390A - Assembled-type reinforced-concrete crash-proof wall and construction method thereof - Google Patents

Abstract

An assembled reinforced concrete anti-collision wall and its construction method. The anti-collision wall includes prefabricated blocks and cast-in-place blocks alternately arranged, and the prefabricated blocks are located between adjacent cast-in-place blocks and In contact with the cast-in-place stopper, the prefabricated stopper is provided with a groove on the contact surface, and the cast-in-place stopper is correspondingly provided with a protrusion on the contact surface to cooperate with the groove. The prefabricated reinforced concrete anti-collision wall of the present invention adopts prefabricated stoppers and cast-in-place stoppers to be arranged alternately, concrete is poured between the prefabricated stoppers to form cast-in-place stoppers, and grooves and bumps are used to cooperate on the contact surface, so that The cast-in-place block is closely combined with the prefabricated block, and the entire anti-collision wall has high building strength, good bonding performance and good durability of each combination. The bridge deck anti-collision wall structure of the traditional bridge has the problem of poor construction connection, and at the same time, it can improve the construction progress, the overall stability is good, and the service life is long.

Description

A prefabricated reinforced concrete anti-collision wall and its construction method

technical field

The invention relates to the technical field of bridge structures, in particular to an assembled reinforced concrete anti-collision wall and a construction method thereof.

Background technique

The rapid development of the national economy, the application of new engineering materials and new structures have developed rapidly along with the development of highways. In recent years, with the increase of traffic volume and axle load, some bridges in China have been damaged, resulting in huge economic losses and great social repercussions, which have aroused widespread concern. As an accessory structure of the bridge, the bridge anti-collision wall is not only an important safety protection, but also its line shape and surface finish directly affect the beauty and quality of the bridge. However, because its structure is often small, it is easy to ignore in thought; and there are many embedded parts of the anti-collision wall and the space is small, and the current design of the anti-collision wall tends to be more and more beautiful in appearance, which makes the anti-collision wall from the construction point of view , there are certain difficulties in fine construction, resulting in often unsatisfactory construction quality.

According to the actual situation, the general anti-collision wall needs to be poured symmetrically. For reinforced concrete, due to the cement concrete material itself, the site construction is affected by many factors. Due to the particularity of the anti-collision wall structure, the top opening is narrow and the steel bars inside the anti-collision wall are relatively dense, it is difficult to cut and vibrate concrete, and quality defects are prone to occur, and the construction quality is not easy to guarantee.

Therefore, it is necessary to design a better anti-collision wall to solve the above problems.

Contents of the invention

Aiming at the problems existing in the prior art, the invention provides an assembled reinforced concrete anti-collision wall and a construction method thereof which meet the strength requirement and can improve the construction progress.

In order to achieve the above object, the present invention adopts the following technical solutions:

An assembled reinforced concrete anti-collision wall, comprising prefabricated blocks and cast-in-place blocks arranged alternately, the prefabricated blocks are located between adjacent cast-in-place blocks and are in contact with the cast-in-place blocks, The prefabricated block is provided with grooves on the contact surface, and the cast-in-place block is correspondingly provided with protrusions on the contact surface to cooperate with the grooves.

Further, the groove is recessed from the contact surface toward the inside of the prefabricated block, the groove is trapezoidal, and the width of the bottom of the groove is greater than the width of the top of the groove.

Further, the prefabricated stop block is provided with a first transverse steel bar parallel to the bridge deck, and the two ends of the first transverse steel bar pass through the two end faces of the prefabricated stop block.

Further, the cast-in-place block is provided with a second transverse reinforcement, and the end of the second transverse reinforcement is welded to the end of the first transverse reinforcement.

Further, a first vertical steel bar is arranged upward on the bridge surface, and the first vertical steel bar is bound and fixed with the second horizontal steel bar.

Further, the bridge surface is provided with a first vertical reinforcement, and the cast-in-place block is provided with a second vertical reinforcement, and the end of the second vertical reinforcement is welded to the first vertical reinforcement, And the second vertical steel bar is bound and fixed to the second horizontal steel bar.

A construction method based on the above-mentioned prefabricated reinforced concrete anti-collision wall, comprising:

Step 1: making the prefabricated stopper, making a plurality of prefabricated stoppers according to the design size, and machining the grooves on both ends of the prefabricated stopper;

Step 2: Bridge deck treatment, leveling the position where the prefabricated block needs to be arranged, and binding the steel bars in the non-prefabricated construction area;

Step 3: Arranging the prefabricated block made in step 1 on the leveled bridge surface in step 2;

Step 4: pouring the cast-in-place block, installing formwork in the construction area between two adjacent prefabricated blocks, and then pouring concrete in the construction area to form the cast-in-place block, The concrete enters the groove to form bumps at both ends of the cast-in-place block.

Further, in the process of connecting the steel bars, the second transverse steel bars in the construction area are first bound to the first vertical steel bars on the bridge surface, and then the ends of the second transverse steel bars protrude from the prefabricated The end of the first transverse reinforcement of the block is welded.

Further, in the reinforcement connection process, the second vertical reinforcement in the construction area is first welded to the first vertical reinforcement on the bridge surface, and then the second horizontal reinforcement in the construction area is welded to the second vertical reinforcement in the construction area. The vertical reinforcing bars are bound, and finally the end of the second transverse reinforcing bar is welded to the end of the first transverse reinforcing bar protruding from the prefabricated block.

Further, in step 3, before arranging the prefabricated stopper, apply adhesive on the corresponding position of the bridge deck.

Beneficial effects of the present invention:

The prefabricated reinforced concrete anti-collision wall of the present invention adopts prefabricated stoppers and cast-in-place stoppers to be arranged alternately, concrete is poured between the prefabricated stoppers to form cast-in-place stoppers, and grooves and bumps are used to cooperate on the contact surface, so that The cast-in-place block is closely combined with the prefabricated block, and the entire anti-collision wall has high building strength, good bonding performance and good durability of each combination. The bridge deck anti-collision wall structure of the traditional bridge has the problem of poor construction connection, and at the same time, it can improve the construction progress, the overall stability is good, and the service life is long.

Description of drawings

Fig. 1 is the structural representation of assembled reinforced concrete anti-collision wall of the present invention;

Fig. 2 is the front view sectional schematic diagram of Fig. 1;

Fig. 3 is a side sectional schematic diagram of Fig. 1;

Fig. 4 is a side sectional schematic view of another embodiment of the present invention;

In the figure, 1—prefabricated block, 2—cast-in-place block, 3—contact surface, 4—groove, 5—bump, 6—first transverse reinforcement, 7—second transverse reinforcement, 8—first vertical reinforcement direction reinforcement, 9—second vertical reinforcement, 10—bridge deck.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

In addition, the descriptions involving "first", "second" and so on in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

As shown in Fig. 1 and Fig. 2, the present invention provides an assembled reinforced concrete anti-collision wall, which is arranged on the bridge deck 10 of the bridge. Located between adjacent cast-in-place stoppers 2, only cast-in-place stoppers 2 can be provided at both ends of the bridge deck 10. The prefabricated block 1 is in contact with the cast-in-place block 2 , the prefabricated block 1 is provided with a groove 4 on the contact surface 3 , and the cast-in-place block 2 is provided with a bump 5 corresponding to the contact surface 4 to cooperate with the groove 4 . In this embodiment, the groove 4 is recessed from the contact surface 3 toward the inside of the prefabricated block 1 , the groove 4 is trapezoidal, and the width of the bottom of the groove 4 is greater than that of the top. The shape of the bump 5 corresponds to the shape of the groove 4, so the bump 5 can be confined in the groove 4 to prevent the two from falling off. The prefabricated block 1 and the cast-in-place block 2 are connected by the groove 4 and the bump 5, so that the cast-in-place block 2 is closely combined with the prefabricated block 1, and the whole anti-collision wall building has high strength, and the bonding performance of each combination is good. Good durability. When the anti-collision wall is subjected to oblique force, the mutual force can be used to increase the tensile strength to ensure its good integrity.

As shown in Figures 1 to 3, the prefabricated block 1 is provided with a first transverse reinforcement 6 parallel to the bridge deck 10, which can increase the strength of the prefabricated block 1, and the two ends of the first transverse reinforcement 6 pass through the prefabricated block 1. On both ends, the cast-in-place stopper 2 is provided with a second transverse steel bar 7, the arrangement of the second transverse steel bar 7 is the same as that of the first transverse steel bar 6, and they are set in one-to-one correspondence, and the end of each second transverse steel bar 7 is welded on The end of the first transverse bar 6 . A plurality of rows of first vertical steel bars 8 are reserved in the bridge deck 10. The first vertical steel bars 8 protrude from the bridge deck 10 and extend upward. In this embodiment, the height of the first vertical steel bars 8 extending upward is relatively high. Close to the height of the prefabricated block 1, the steel bars in the cast-in-place block 2 can be fixed by binding the first vertical steel bar 8 and the second transverse steel bar 7 to strengthen the strength of the cast-in-place block 2 .

As shown in Figure 4, in another embodiment, the height of the first vertical reinforcement 8 extending upwards is relatively low, only close to the height of the second row of second transverse reinforcement 7, then the second vertical reinforcement 8 is set in the cast-in-place block 2 Reinforcing bar 9, the second vertical reinforcing bar 9 and the arrangement of first vertical reinforcing bar 8 are approximately the same, wherein the shortest first vertical reinforcing bar 8 is not provided with the second vertical reinforcing bar 9, the bottom of the second vertical reinforcing bar 9 and The top of the first vertical steel bar 8 is welded, and the second vertical steel bar 9 and the second transverse steel bar 7 are bound and fixed.

The prefabricated concrete composite bridge deck structure of the present invention is assembled by the prefabricated block 1 and the cast-in-place block 2, which are jointly stressed with the bridge deck 10, and the bridge deck pavement and anti-collision wall technologies are widely used in the highway bridge construction process. It not only improves the quality of highway bridges, but also enables the effective development of traffic, and also ensures people's lives and properties.

The construction method of the above prefabricated reinforced concrete anti-collision wall is as follows:

Step 1: Make prefabricated stoppers 1, as shown in Figure 1, make multiple prefabricated stoppers 1 according to the design size in the prefabrication factory, and process grooves 4 on both ends of the prefabricated stoppers 1. It has a prism structure, and the first transverse reinforcement 6 prepared in the prefabricated block 1 protrudes from both ends.

Step 2: Process the bridge deck 10. After the bridge deck 10 reaches its strength, level it at the position where the prefabricated block 1 needs to be arranged, and bind the steel bars according to the designed size at the non-prefabricated place.

In this embodiment, the specific method is to bind the second transverse steel bar 7 in the construction area of the non-prefabricated place with the reserved first vertical steel bar 8 on the bridge deck 10 . As shown in Fig. 4, in another embodiment, the second vertical steel bar 9 in the construction area is welded with the first vertical steel bar 8 reserved on the bridge deck, and then the second transverse steel bar 7 in the construction area is welded to the first vertical steel bar 8 in the construction area. Two vertical steel bars 9 are bound, so that the steel bars in the non-prefabricated construction area are bound and fixed.

Step 3: Arrange the prefabricated block 1 made in step 1 on the leveled bridge deck 10 in step 2 according to the design requirements, and apply adhesive to the corresponding position on the bridge deck 10 before the arrangement. The first transverse reinforcement bars 6 protruding from both ends of the arranged prefabricated block 1 correspond to the second transverse reinforcement bars 7 one by one, and the ends of the second transverse reinforcement bars 7 and the first transverse reinforcement bars 6 are welded and fixed.

Step 4: Pour cast-in-place block 2, install formwork in the construction area between two adjacent prefabricated block 1, and then pour pre-prepared concrete in the construction area to form cast-in-place block 2, and the concrete enters the concave Protrusions 5 located at both ends of the cast-in-place block 2 are formed in the groove 4. Because the cast-in-place method is adopted, the formed protrusions 5 are tightly combined in the groove 4 to prevent the separation of the cast-in-place block 2 and the prefabricated block 1 .

After the pouring is completed, the cast-in-situ block 2 needs to be maintained to form a prefabricated reinforced concrete anti-collision wall. Finally, the surface treatment is carried out. After the mechanical indicators such as the strength of the prefabricated block 1 and the cast-in-place block 2 meet the design requirements, the top surfaces of the prefabricated block 1 and the cast-in-place block 2 are polished to form a suitable anti-collision wall. Make its line and surface finish meet the conditions, ensure the beauty and quality of the bridge, and complete the construction.

The bridge deck pavement structure of the invention is easy to construct and has good mechanical performance, which can effectively solve the problem of poor connection of the bridge deck anti-collision wall structure of the traditional bridge. At the same time, the curing time is easy to control, the overall stability is good, and the service life is long.

The above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without Any deviation from the spirit and scope of the technical solution shall be covered by the scope of the claims of the present invention.

Claims (10)

1. an assembled steel reinforced concrete anti-collision wall, it is characterized in that, comprise: the setting alternate with cast-in-place block of prefabricated block, described prefabricated block is between adjacent described cast-in-place block, and contact with described cast-in-place block, described prefabricated block is provided with groove in contact surface, and described cast-in-place block is provided with projection and described groove fit in described contact surface correspondence.

2. assembled steel reinforced concrete anti-collision wall according to claim 1, is characterized in that: described groove is recessed towards described prefabricated block inside from described contact surface, and in echelon, the width of described groove bottom land is greater than the width on groove top to described groove.

3. assembled steel reinforced concrete anti-collision wall according to claim 1, is characterized in that: be provided with the first transverse reinforcement being parallel to bridge floor in described prefabricated block, the two ends of described first transverse reinforcement pass the both ends of the surface of described prefabricated block.

4. assembled steel reinforced concrete anti-collision wall according to claim 3, is characterized in that: be provided with the second transverse reinforcement in described cast-in-place block, the welding edges of described second transverse reinforcement is in the end of described first transverse reinforcement.

5. assembled steel reinforced concrete anti-collision wall according to claim 4, is characterized in that: described bridge floor is upwards provided with the first vertical reinforcement, and described first vertical reinforcement and described second transverse reinforcement colligation are fixed.

6. assembled steel reinforced concrete anti-collision wall according to claim 4, it is characterized in that: described bridge floor is upwards provided with the first vertical reinforcement, the second vertical reinforcement is provided with in described cast-in-place block, the end of described second vertical reinforcement and described first vertical reinforced-bar-welding, and described second vertical reinforcement and described second transverse reinforcement colligation are fixed.

7., based on the construction method of assembled steel reinforced concrete anti-collision wall according to claim 1, it is characterized in that, comprising:

Step one: make described prefabricated block, make prefabricated block described in polylith according to design size, the both ends of the surface in described prefabricated block process described groove;

Step 2: bridge floor process, the position need arranged by prefabricated block flattens, and carries out the colligation of reinforcing bar at non-prefabricated construction area;

Step 3: described prefabricated block step one made is arranged on the described bridge floor of step 2 leveling;

Step 4: build described cast-in-place block, described construction area installation form between adjacent two described prefabricated blocks, again by concreting in described construction area, form described cast-in-place block, described concrete enters the projection being formed in described groove and be positioned at the two ends of described cast-in-place block.

8. construction method according to claim 7, it is characterized in that: in bar connecting process, first by the first vertical reinforcement colligation on the second transverse reinforcement in described construction area and described bridge floor, then by the end of described second transverse reinforcement and the welding edges of the first transverse reinforcement stretching out described prefabricated block.

9. construction method according to claim 7, it is characterized in that: in bar connecting process, first by the first vertical reinforced-bar-welding on the second vertical reinforcement of described construction area and described bridge floor, then by the second transverse reinforcement in described construction area and described second vertical reinforcement colligation, finally by the end of described second transverse reinforcement and the welding edges of the first transverse reinforcement stretching out described prefabricated block.

10. construction method according to claim 7, is characterized in that: in step 3, before arranging described prefabricated block, smears cementing agent at described bridge floor correspondence position.