Prefabricated assembly type combined anti-collision wall for bridge in seasonal frozen area

Abstract

The utility model belongs to the technical field of anti-collision walls, and particularly relates to a prefabricated assembly type combined anti-collision wall for a bridge in a seasonal frozen area, which comprises an embedded base arranged on one side of a bridge floor, and an anti-collision wall fixedly connected to the top surface of the embedded base; the anti-collision wall comprises two bottom formworks which are symmetrically arranged, the bottom formworks are fixedly connected with the top face of the embedded base, the tops of the two bottom formworks are connected with the same upper formwork in a limiting and sliding mode, a packaging opening is formed between the top ends of the two upper formworks, and the bottom formworks and the upper formworks are filled with internal filler. According to the utility model, the anti-collision wall above can be well fixed by arranging the pre-embedded base, convenient installation, disassembly and maintenance can be realized by arranging the detachable bottom template and the detachable upper template, the sectional structure is convenient to transport, install and replace, the maintenance cost is reduced, and the damage degree during traffic collision is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of anti-collision walls, in particular to a prefabricated assembled combined anti-collision wall for bridges in seasonally frozen areas. Background Art

[0002] As a core component of bridge and road safety facilities, the main function of crash barriers is to prevent vehicles from driving off the bridge deck during driving and to minimize the damage caused by accidents. However, the existing reinforced concrete crash barriers are very rigid and easily generate large impact forces, posing a serious threat to the safety of life and property of drivers and passengers. In addition, in seasonally frozen areas, salt water erosion and repeated freezing and thawing during the freezing and thawing of snow will damage the bottom of the crash barriers, which not only increases the cost of subsequent maintenance and upkeep, but also has an adverse effect on the stability of the main structure of the bridge, the road surface and even the roadbed.

[0003] Therefore, this project is mainly devoted to designing an innovative assembled composite crash wall. The crash wall structure is generally divided into two parts: the outer template and the embedded base, and the appearance is an integrated composite crash wall. While adopting modular design, we continue to explore key technologies such as segment division principles, methods and construction processes to achieve convenient installation, disassembly and maintenance processes. Utility Model Content

[0004] The utility model aims to provide a prefabricated assembled combined anti-collision wall for bridges in seasonally frozen areas to solve the above-mentioned problems.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The prefabricated assembled composite anti-collision wall for bridges in seasonally frozen areas comprises: an embedded base arranged on one side of the bridge deck, the top surface of the embedded base being fixedly connected with the anti-collision wall;

[0007] The anti-collision wall includes two symmetrically arranged bottom templates, which are fixedly connected to the top surface of the embedded base. The tops of the two bottom templates are limitedly and slidably connected to the same upper template. A sealing opening is opened between the tops of the two upper templates, and the bottom templates and the upper templates are filled with internal fillers.

[0008] Preferably, a plurality of fixing bolts arranged in an array are fixedly connected to the embedded base, the axes of the fixing bolts are vertically arranged, the top ends of the fixing bolts pass through the bottom template, the part of the fixing bolts located above the bottom template is threadedly connected with a fixing nut, and the bottom surface of the fixing nut abuts against the bottom template.

[0009] Preferably, a lower inclined groove is opened at the top of the bottom template, and docking inclined grooves are opened on both sides of the bottom end of the upper template. The lower inclined groove fits with the corresponding docking inclined groove, and the docking inclined groove is limitedly slidably connected with the corresponding lower inclined groove.

[0010] Preferably, the angle between the lower inclined groove, the docking inclined groove and the horizontal plane is greater than or equal to 3°.

[0011] Preferably, a positioning block is fixedly connected to the lower end of the lower inclined groove, and the upper template abuts against the corresponding positioning block.

[0012] Preferably, the two docking chute grooves are located on the inner sides of the two lower chute grooves.

[0013] Preferably, the packaging opening is detachably connected with tension bolts.

[0014] Compared with the prior art, the utility model has the following advantages and technical effects:

[0015] In the utility model, an embedded base is provided to well fix the upper anti-collision wall, and a detachable bottom template and an upper template are provided to realize convenient installation, disassembly and maintenance. The segmented structure is convenient for transportation, installation and replacement, thus reducing maintenance costs and alleviating the degree of damage in a collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor:

[0017] Figure 1 This is a schematic diagram of the installation of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the anti-collision wall of the utility model;

[0019] Figure 3 It is a top view of the embedded foundation and bridge deck;

[0020] Figure 4 This is the right side view of the bottom template.

[0021] Among them, 1. bridge deck; 2. crash barrier; 3. internal filler; 4. bottom formwork; 5. upper formwork; 6. sealing port; 7. embedded base; 8. fixing bolts; 9. fixing nuts; 10. tension bolts; 401. lower inclined groove; 402. positioning block. DETAILED DESCRIPTION

[0022] 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.

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Reference Figures 1 to 4 The utility model discloses a prefabricated assembled anti-collision wall for a bridge in a seasonally frozen area, comprising: an embedded base 7 arranged on one side of a bridge deck 1, and an anti-collision wall 2 is fixedly connected to the top surface of the embedded base 7;

[0025] The anti-collision wall 2 includes two symmetrically arranged bottom templates 4, which are fixedly connected to the top surface of the embedded base 7. The tops of the two bottom templates 4 are limitedly and slidingly connected to the same upper template 5. A sealing opening 6 is opened between the tops of the two upper templates 5, and the bottom templates 4 and the upper templates 5 are filled with internal fillers 3.

[0026] The utility model can well fix the upper anti-collision wall 2 by arranging a pre-buried base 7, and can realize convenient installation, disassembly and maintenance by arranging a detachable bottom template 4 and an upper template 5. The segmented structure is convenient for transportation, installation and replacement, reduces the maintenance cost, and alleviates the degree of damage in the event of a collision.

[0027] The bottom formwork 4 and the upper formwork 5 are preferably 3 cm thick. Chopped steel fibers are used as reinforcing materials, and appropriate amounts of waste tire particles are added to prepare frost and impact resistant high performance concrete (FIRHPC). Based on the response surface methodology, the water-cement ratio, rubber particle content, and steel fiber content are used as factors to study the compressive strength, impact resistance, and flexural strength of FIRHPC, and the optimal mix ratio is determined. Finally, the surface permanent formwork, i.e., the bottom formwork 4 and the upper formwork 5, is prepared.

[0028] Among them, the internal filler 3 uses polypropylene fiber as the main reinforcement item, carbon fiber and carbon black as conductive materials, optimizes the mix ratio of each material component, and takes electrothermal properties, ductility, and toughness resistance as the goals to prepare conductive high-performance concrete (Conductive High Performance Concrete, referred to as CHPC) with electrothermal properties as the internal filling material of the crash barrier.

[0029] A further optimized solution is that a plurality of fixing bolts 8 arranged in an array are fixedly connected to the embedded base 7, the axis of the fixing bolt 8 is vertically arranged, the top of the fixing bolt 8 passes through the bottom template 4, the part of the fixing bolt 8 located above the bottom template 4 is threadedly connected with a fixing nut 9, and the bottom surface of the fixing nut 9 abuts against the bottom template 4.

[0030] The number of fixing bolts 8 is preferably four fixing bolts 8 for one bottom template 4 .

[0031] When installing the device, first fix the two bottom templates 4 by multiple fixing bolts 8 and fixing nuts 9, and then slide the upper template 5 between the two bottom templates 4 to achieve stable installation. The upper template 5 is fixed after pouring by setting tension bolts 10.

[0032] According to a further optimization scheme, a lower inclined groove 401 is provided at the top of the bottom template 4, and docking inclined grooves are provided on both sides of the bottom of the upper template 5. The lower inclined groove 401 is matched with the corresponding docking inclined groove, and the docking inclined groove is connected to the corresponding lower inclined groove 401 by limited sliding.

[0033] According to a further optimization scheme, the angle between the lower inclined groove 401, the docking inclined groove and the horizontal plane is greater than or equal to 3°.

[0034] According to a further optimized solution, a positioning block 402 is fixedly connected to the lower end of the lower inclined groove 401 , and the upper template 5 abuts against the corresponding positioning block 402 .

[0035] The setting of the positioning block 402 can ensure that the upper template 5 can be positioned after sliding into the bottom template 4. During pouring or other processes, the upper template 5 may be subjected to force in the horizontal direction. At this time, the two oblique slots can ensure that the position of the upper template 5 will not change after being subjected to force, thereby improving the accuracy of the project.

[0036] According to a further optimized solution, the two docking chute grooves are located on the inner side of the two lower chute grooves 401 .

[0037] The structural setting of the two docking bevel grooves located on the inner side of the two lower bevel grooves 401 can ensure that when the upper template 5 above is subjected to force, the upper template 5 can hook the lower bevel groove 401 through the docking bevel grooves, thereby achieving stability and preventing breakage after being subjected to force.

[0038] According to a further optimized solution, the sealing opening 6 is detachably connected with a tension bolt 10 .

[0039] The tension bolts 10 are preferably M16 tension bolts. After the tension bolts 10 are installed, a nut protective sleeve is put on each tension bolt 10.

[0040] In addition, in actual applications, this device also optimizes the dimensions of prefabricated segments of assembled surface permanent formwork based on finite element numerical simulation analysis, divides formwork blocks and designs formwork joints, determines design parameters and technical indicators, and completes construction process research.

[0041] Through finite element numerical simulation analysis, the size of the surface permanent formwork was optimized, the modules of the surface permanent formwork were distinguished, and the corresponding connections were designed. At the same time, the design parameters and technical indicators were determined. In order to verify this plan, the function of the crash wall was tested while the bridge was trial-built, and the design plan and construction process were adjusted according to the actual situation. Finally, the structure of the prefabricated part of the surface permanent formwork was determined, which was mainly divided into three outer modules, and the design plan and construction process were determined.

[0042] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. Prefabricated assembled anti-collision wall for bridges in seasonally frozen areas, characterized by: include: A pre-buried base (7) is arranged on one side of the bridge deck (1), and a top surface of the pre-buried base (7) is fixedly connected to a crash barrier (2); The anti-collision wall (2) comprises two symmetrically arranged bottom templates (4), the bottom templates (4) are fixedly connected to the top surface of the embedded base (7), the tops of the two bottom templates (4) are limitedly slidably connected to the same upper template (5), a sealing opening (6) is opened between the tops of the two upper templates (5), and the bottom templates (4) and the upper templates (5) are filled with internal fillers (3).

2. The prefabricated assembled anti-collision wall for bridges in seasonally frozen areas according to claim 1 is characterized by: A plurality of fixing bolts (8) arranged in an array are fixedly connected to the embedded base (7), the axes of the fixing bolts (8) are arranged vertically, the top ends of the fixing bolts (8) penetrate the bottom template (4), the portion of the fixing bolts (8) located above the bottom template (4) is threadedly connected with a fixing nut (9), and the bottom surface of the fixing nut (9) abuts against the bottom template (4).

3. The prefabricated assembled anti-collision wall for bridges in seasonally frozen areas according to claim 1 is characterized by: The top of the bottom template (4) is provided with a lower inclined groove (401), and both sides of the bottom of the upper template (5) are provided with docking inclined grooves, the lower inclined groove (401) is matched with the corresponding docking inclined groove, and the docking inclined groove is connected with the corresponding lower inclined groove (401) in a limited sliding manner.

4. The prefabricated assembled anti-collision wall for bridges in seasonally frozen areas according to claim 3 is characterized by: The angles between the lower inclined groove (401), the docking inclined groove and the horizontal plane are greater than or equal to 3°.

5. The prefabricated assembled anti-collision wall for bridges in seasonally frozen areas according to claim 3 is characterized by: A positioning block (402) is fixedly connected to the lower end of the lower inclined groove (401), and the upper template (5) abuts against the corresponding positioning block (402).

6. The prefabricated assembled anti-collision wall for bridges in seasonally frozen areas according to claim 3 is characterized by: The two docking inclined grooves are located on the inner sides of the two lower inclined grooves (401).

7. The prefabricated assembled anti-collision wall for bridges in seasonally frozen areas according to claim 1 is characterized by: The sealing opening (6) is detachably connected with a tension bolt (10).

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