Bridge guardrail mounting, fixing and adjusting structure

Abstract

The utility model provides a bridge guardrail mounting, fixing and adjusting structure which solves the problems of wet joint leakage, insufficient strength and high difficulty in mounting and adjusting during mounting and construction of an existing prefabricated concrete guardrail. Comprising a bridge and prefabricated guardrail shells installed on the two sides of the bridge, reserved steel bars are arranged on the two sides of the bridge, and the reserved steel bars are inserted into cast-in-place cavities of the prefabricated guardrail shells; bolt holes are formed in the side faces, and the adjacent prefabricated guardrail shells are fixed through pull bolts. The lower edge of the front face and a bridge are fixed through angle iron connectors, and cast-in-place concrete is arranged in the cast-in-place cavity of the prefabricated guardrail shell. The cast-in-place joint is formed between the prefabricated guardrail and the original bridge through secondary cast-in-place concrete construction, the connection strength of the cast-in-place joint is basically the same as that of a cast-in-place construction process, and the problem of leakage does not exist in the lap joint face between the prefabricated guardrail and the original bridge.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge concrete guardrails and installation thereof. Background Art

[0002] In bridge engineering, for the sake of driving safety, guardrails are installed on both sides of the road and in the median. According to the different materials, they can be divided into steel guardrails and concrete guardrails. Among them, concrete guardrails are divided into cast-in-place concrete guardrails and precast concrete guardrails according to different construction processes.

[0003] CN220503672U discloses a precast concrete guardrail, including a pre-buried steel pipe and a tensioning nut, and also including a connecting rod and an anchoring nut on the guardrail foundation, one end of the connecting rod is inserted into the guardrail foundation and fixed by the anchoring nut, a tensioning notch is provided at the top of the precast concrete guardrail, one end of the pre-buried steel pipe is connected with the tensioning notch, the connecting rod is sequentially inserted into the pre-buried steel pipe and the tensioning notch and fixed with the tensioning nut, the tensioning nut is tightly pressed against the bottom surface of the tensioning notch, a shear groove is provided on the bottom surface of the precast concrete guardrail, and a shear key is provided on the guardrail foundation. That is, the concrete guardrail is fixed by tensioning, which requires a mounting hole to be reserved in the bridge and the guardrail, and this mounting hole will destroy the original strength of the bridge, and there is a gap at the lap joint of the bridge and the guardrail. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the utility model provides a bridge guardrail installation, fixing and adjustment structure to solve the problems of wet joint leakage, insufficient strength and difficulty in installation and adjustment of existing precast concrete guardrails during installation and construction.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A bridge guardrail installation, fixing and adjustment structure comprises a bridge and a prefabricated guardrail shell installed on both sides of the bridge, with reserved steel bars arranged on both sides of the bridge. The structure is characterized in that: the prefabricated guardrail shell is a hollow shell structure consisting of a front side, a back side and side surfaces, and the reserved steel bars are inserted into the cast-in-place cavity of the prefabricated guardrail shell; bolt holes are arranged on the side surfaces and adjacent prefabricated guardrail shells are fixed by tension bolts; the lower edge of the front side is fixed to the bridge by triangular iron angle codes, and the cast-in-place cavity of the prefabricated guardrail shell is filled with cast-in-place concrete.

[0007] Furthermore, bonding mortar is provided at the mounting surfaces of the bridge and the prefabricated guardrail shell.

[0008] Furthermore, a window is provided at the lower portion of the side surface, and two adjacent prefabricated guardrail shell windows are connected to each other.

[0009] Furthermore, the mounting holes on the triangular iron angle brackets are elongated holes, and expansion bolts or fastening bolts are used to fix the triangular iron angle brackets to the prefabricated guardrail shell and the bridge respectively.

[0010] Furthermore, the reserved steel bars are engaged with the cast-in-place concrete in the prefabricated guardrail shell.

[0011] Furthermore, the reserved steel bars are generally in a closed n-shape.

[0012] Furthermore, a steel mesh or a steel wire mesh is arranged inside the shell of the prefabricated guardrail shell.

[0013] Furthermore, connecting steel bars are arranged in a vertical direction of the steel mesh, and the connecting steel bars connect the shells between the front and back sides.

[0014] Furthermore, the prefabricated guardrail shell is designed with uniform thickness, and the thickness is not less than 40 mm.

[0015] Furthermore, the cross-section of the prefabricated guardrail is trapezoidal.

[0016] The beneficial effects of the utility model are:

[0017] The connection strength is high. This technology forms a cast-in-place node between the prefabricated guardrail and the original bridge through the construction of secondary cast-in-place concrete. The connection strength is basically the same as the cast-in-place construction process, and there is no leakage problem on the lap joint between the two.

[0018] The integrity is good. The construction structure does not destroy the original structure of the bridge and does not reduce the overall strength of the original bridge.

[0019] The installation and construction are simple. The prefabricated guardrail can be quickly installed and adjusted through the triangular iron corner code, which has the advantage of quick installation and saving construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional view of the prefabricated guardrail shell.

[0021] Figure 2 A partial view of the bridge.

[0022] Figure 3 Schematic diagram of the preliminary installation of the prefabricated guardrail shell on the bridge.

[0023] Figure 4 for Figure 3 Side view of.

[0024] Figure 5 for Figure 3 sectional view of .

[0025] Figure 6 Connect nodes for adjacent precast guardrail shells.

[0026] Figure 7 To install, fix and adjust the structure of the bridge guardrail after construction is completed.

[0027] In the figure:

[0028] 00 bridge, 01 bonding mortar, 02 reserved steel bars,

[0029] 10 prefabricated guardrail shell, 11 front, 12 back, 13 side, 131 bolt hole, 132 window, 133 pull bolt, 14 steel mesh, 15 connecting steel bar,

[0030] 20 triangle iron angle code,

[0031] 30 concrete filling,

[0032] 40 asphalt layers. DETAILED DESCRIPTION

[0033] The bridge guardrail installation, fixing and adjustment structure is based on the bridge design. Reserved steel bars are arranged on both sides of the bridge. The reserved steel bars are generally closed N-shaped. The reserved steel bars are arranged in a row at the edge positions on both sides of the bridge. The reserved steel bars correspond to the cast-in-place cavity in the prefabricated guardrail, that is, they are inserted into the cast-in-place cavity from the lower end, and the fixed connection between the prefabricated guardrail and the bridge is realized through secondary cast-in-place concrete. Since the wet joint is cast-in-place construction, it has a better anti-leakage effect.

[0034] The following is attached to the instruction manual Figure 1 To Attachment Figure 7 This embodiment is described in detail.

[0035] Prefabricated guardrail shell 10, the prefabricated guardrail shell is not a traditional solid design, but a hollow design. Specifically, the prefabricated guardrail shell is a hollow shell structure composed of a front 11, a back 12 and side surfaces 13 on both sides. The upper opening is used for cast-in-place construction, and the lower opening is used to cooperate with the reserved steel bars at the installation site on both sides of the bridge. Furthermore, the above-mentioned front side is the surface facing the side of the driving lane, and the back side is the surface facing the outside of the bridge. One or two bolt holes 131 are provided on the above-mentioned side surface 13, and the initial positioning and fixation (longitudinal) of the two adjacent prefabricated guardrail shells are achieved through the bolt holes and the pull bolts 133. Furthermore, the above-mentioned back surface 12 extends downward to the side of the bridge to ensure sufficient contact area, which has the function of preventing cast-in-place concrete from leaking. During the construction stage, a thin layer of bonding mortar 01 is pre-paved at the guardrail installation site on the bridge 00. The bonding mortar cooperates with the abutment surface of the prefabricated guardrail to achieve the seat mortar installation effect.

[0036] Furthermore, a window 132 is provided at the lower portion of the side surface 13, and a concrete interconnection channel is formed between the window 132 and the bridge. The existence of the interconnection channel effectively improves the integrity of the prefabricated guardrail after the secondary pouring operation, thereby enhancing the strength.

[0037] Furthermore, a triangular iron bracket 20 is used to initially fix the lower edge of the front surface of the prefabricated guardrail shell 10 to the upper surface of the bridge. The triangular iron bracket 20 has a long hole. The triangular iron bracket is fixed to the prefabricated guardrail shell and the bridge respectively by expansion bolts or tightening bolts, and the initial state and smoothness of the installation between the prefabricated guardrail shell and the bridge are achieved by adjusting the above bolts. This adjustment step is performed before the cast-in-place concrete construction.

[0038] After the above adjustments are in place, concrete is poured into the cast-in-place cavity using concrete pumping equipment and vibrated. The compact construction effect is achieved through vibration. After pouring, the internal cavity is filled with concrete 30. After curing, the above prefabricated guardrail and bridge are integrated, and the reserved steel bars 02 have a cross-bite effect with the cast-in-place concrete in the prefabricated guardrail shell, and the connection strength is equivalent to that of the cast-in-place concrete guardrail. This guardrail has a more reliable safety protection function and can withstand the impact of large-tonnage trucks.

[0039] After the secondary pouring of concrete is fully cured, the asphalt layer 40 of the bridge deck can be laid. The laying of the asphalt layer hides the triangular iron corners, so the triangular iron corners do not need to be removed, further simplifying the construction process and saving construction time.

[0040] Furthermore, the above-mentioned secondary pouring concrete can use ordinary Portland cement or high-grade cement.

[0041] Furthermore, a steel mesh or wire mesh is provided inside the shell of the prefabricated guardrail shell 10, and a connecting steel bar 15 is provided in the vertical direction of the steel mesh 14, and the connecting steel bar connects the shells between the front and back sides, thereby improving the connection strength between the two. The connecting steel bar is optional and can also be omitted. When the connecting steel bar is omitted, the length of the prefabricated guardrail shell should be reduced to prevent damage.

[0042] The above-mentioned prefabricated guardrail shell adopts a uniform thickness design, and the thickness is not less than 40 mm to prevent damage from affecting the strength.

[0043] Furthermore, the cross section of the prefabricated guardrail in this embodiment can be designed to have any contour.

[0044] The embodiments described above are merely descriptions of preferred implementations 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 to the present invention by relevant technical personnel in the field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A bridge guardrail installation, fixing and adjustment structure, comprising a bridge and a prefabricated guardrail shell installed on both sides of the bridge, wherein reserved steel bars are arranged on both sides of the bridge, and the structure is characterized in that: The prefabricated guardrail shell is a hollow shell structure consisting of a front face, a back face and side faces on both sides, and reserved steel bars are inserted into the cast-in-place cavity of the prefabricated guardrail shell; bolt holes are arranged on the side faces and adjacent prefabricated guardrail shells are fixed by tie bolts; the lower edge of the front face is fixed to the bridge by triangular iron angle brackets, and the cast-in-place cavity of the prefabricated guardrail shell is filled with cast-in-place concrete.

2. The bridge guardrail installation, fixing and adjustment structure according to claim 1 is characterized in that: Bonding mortar is provided at the installation surface of the bridge and the prefabricated guardrail shell.

3. The bridge guardrail installation, fixing and adjustment structure according to claim 1 is characterized in that: A window is arranged at the lower part of the side surface, and two adjacent prefabricated guardrail shell windows are connected to each other.

4. The bridge guardrail installation, fixing and adjustment structure according to claim 1 is characterized in that: The mounting holes on the triangular iron angle brackets are elongated holes, and the triangular iron angle brackets are fixed to the prefabricated guardrail shell and the bridge respectively by expansion bolts or fastening bolts.

5. The bridge guardrail installation, fixing and adjustment structure according to claim 1 is characterized in that: The reserved steel bars are engaged with the cast-in-place concrete in the prefabricated guardrail shell.

6. The bridge guardrail installation, fixing and adjustment structure according to claim 5, characterized in that: The reserved steel bars are generally in a closed n-shape.

7. The bridge guardrail installation, fixing and adjustment structure according to claim 1 is characterized in that: A steel mesh or a steel wire mesh is arranged inside the shell of the prefabricated guardrail shell.

8. The bridge guardrail installation, fixing and adjustment structure according to claim 7 is characterized in that: Connecting steel bars are arranged in the vertical direction of the steel mesh, and the connecting steel bars connect the shells between the front and back sides.

9. The bridge guardrail installation, fixing and adjustment structure according to claim 1, characterized in that: The prefabricated guardrail shell is designed with uniform thickness and the thickness is not less than 40 mm.

10. The bridge guardrail installation, fixing and adjustment structure according to claim 1, characterized in that: The cross section of the prefabricated guardrail is trapezoidal.

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