CN-121976461-A - Multistage energy consumption prefabricated UHPC anti-collision wall and assembly method thereof

Abstract

The invention provides a multi-stage energy consumption prefabricated UHPC anti-collision wall and an assembly method thereof, and relates to the technical field of bridge engineering. Comprises a UHPC framework, a first U-shaped planting bar, a second U-shaped planting bar and an energy consumption connecting piece, wherein the bottom of the UHPC framework is provided with the first U-shaped planting bar; the first U-shaped embedded ribs are connected with the top wall of the reserved shear groove, the second U-shaped embedded ribs are connected with the bridge deck platform, casting holes communicated with the reserved shear groove are formed in the UHPC framework, and the UHPC framework is connected with the bridge deck platform through energy consumption connecting pieces. The energy-consuming connecting piece, the plastic energy-consuming material and the post-pouring connecting structure formed by the reserved shear groove and the U-shaped embedded ribs jointly form a clear multi-stage energy-consuming mechanism, wherein the plastic energy-consuming material is used as first-stage energy consumption, initial impact energy is absorbed through compression deformation, the energy-consuming connecting piece is used as second-stage energy consumption, main energy is dissipated through elastoplastic deformation of the elliptical ring-shaped connecting piece, and the reserved shear groove and the inner U-shaped embedded ribs formed by casting and solidifying ultra-high-performance concrete are used as third-stage energy consumption, so that final integrity and residual strength guarantee are provided.

Inventors

• ZHOU ZHIQIANG
• MA YANHUI
• Bai Danchuan
• ZHAO XIAOJUAN
• WU JUXUE
• GUO JUNFENG
• XIAO YUEQIANG
• HE XI
• CHEN WENPING
• LIANG LIANG
• Xi Rongzhang
• CHEN PENGHUI

Assignees

• 中铁二十三局集团第三工程有限公司

Dates

Publication Date

20260505

Application Date

20260312

Claims (9)

1. 1. The multi-stage energy consumption prefabricated UHPC anti-collision wall is arranged at the edge of a bridge deck platform and is characterized by comprising a UHPC framework, a first U-shaped embedded rib, a second U-shaped embedded rib and an energy consumption connecting piece, wherein a reserved shear groove is formed in the bottom of the UHPC framework; the first U-shaped planted bars and the second U-shaped planted bars are both positioned in the reserved shear groove, the first U-shaped planted bars are connected with the top wall of the reserved shear groove, the second U-shaped planted bars are connected with the bridge deck platform, and a pouring hole communicated with the reserved shear groove is formed in the UHPC framework; The bottom of the UHPC framework is provided with a mounting groove for mounting the energy consumption connecting piece, and the UHPC framework is connected with the bridge deck platform through the energy consumption connecting piece.
2. 2. The multi-stage energy-consuming prefabricated UHPC crash wall of claim 1 wherein the side of the UHPC framework remote from the deck platform edge is provided with a plastic energy-consuming material.
3. 3. The multi-stage energy-consuming prefabricated UHPC wall of claim 1, wherein the energy-consuming connector comprises an upper connector, an elliptical ring connector and a lower connector, the upper connector is arranged above the elliptical ring connector in a semi-encircling manner and fixedly connected with one side of the elliptical ring connector, and the lower connector is arranged below the elliptical ring connector in a semi-encircling manner and fixedly connected with one side of the elliptical ring connector.
4. 4. The multi-stage energy-consuming prefabricated UHPC crash wall of claim 3 wherein the upper connector is a first L-shaped mounting bracket, the side wall of the first L-shaped mounting bracket is connected to the elliptical ring connector by bolts, and the top of the first L-shaped mounting bracket is provided with pegs for connection to the UHPC framework.
5. 5. The multi-stage energy-consuming prefabricated UHPC anti-collision wall according to claim 3, wherein the lower connecting member is a second L-shaped mounting seat, the side wall of the second L-shaped mounting seat is connected with the elliptical ring-shaped connecting member by bolts, and the bottom of the second L-shaped mounting seat is provided with studs for connecting with the deck platform.
6. 6. A multistage energy-consuming prefabricated UHPC crash wall according to claim 3, wherein the inner side of the elliptical ring-shaped engagement member is provided with first reinforcing ribs arranged in the circumferential direction and a plurality of second reinforcing ribs arranged at intervals in the width direction.
7. 7. A multi-stage energy consuming prefabricated UHPC crash wall according to claim 3 wherein the outer wall of the elliptical ring shaped engagement member has a thickness greater in the middle than at the sides, and a smooth transition from the middle to the sides.
8. 8. The multi-stage energy consumption prefabricated UHPC anti-collision wall according to claim 1, wherein the cross section of the reserved shear groove is trapezoid, and the internal casting material is ultra-high performance concrete.
9. 9. The assembling method of the multi-stage energy consumption prefabricated UHPC anti-collision wall is characterized by comprising the following steps of: S1, prefabricating an UHPC framework according to the requirement, and pre-burying a first U-shaped planted rib and a first L-shaped mounting seat on the prefabricated UHPC framework in the prefabricating process; s2, mounting a plastic-like material on the inner side of the anti-collision wall, and tightly attaching the anti-collision wall to the UHPC framework; S3, mounting a second U-shaped bar on the bridge deck platform, arranging the UHPC framework at a mounting position, positioning the second U-shaped bar in a reserved shear groove, connecting a second L-shaped mounting seat with the bridge deck platform, and mounting elliptical ring-shaped connecting pieces on the first L-shaped mounting seat and the second L-shaped mounting seat; S4, injecting ultra-high-performance concrete into the reserved shear groove through the pouring hole, and completing the installation work of the UHPC anti-collision wall after the ultra-high-performance concrete is solidified.

Description

Multistage energy consumption prefabricated UHPC anti-collision wall and assembly method thereof Technical Field The invention relates to the technical field of bridge engineering, in particular to a multi-stage energy consumption prefabricated UHPC anti-collision wall and an assembly method thereof. Background The anti-collision wall is an important facility for guaranteeing bridge traffic safety, and has the main effects of absorbing collision energy when a vehicle collides, preventing the vehicle from rushing out of a bridge deck and protecting the safety of the vehicle and passengers. The traditional anti-collision wall generally adopts a cast-in-place concrete structure, and has the problems of long construction period, high quality control difficulty, poor durability and the like. In recent years, with the development of ultra-high performance concrete (UHPC) technology, UHPC materials are increasingly being used in the construction of bridge anti-collision walls due to their high strength, high durability and good impact resistance. In the prior art, UHPC anti-collision walls are connected with bridge decks through embedded bars in a way of integral prefabrication or segmented prefabrication. The structure of the post-cast strip comprises a UHPC framework, energy-consuming connectors, post-cast strips and the like. However, the anti-collision wall in the prior art is single in energy consumption mechanism, mainly depends on the high strength and toughness of UHPC materials, lacks multi-stage energy consumption design, has limited energy consumption effect under high-energy collision, and is easy to locally damage. Disclosure of Invention The invention aims to provide a multi-stage energy consumption prefabricated UHPC anti-collision wall and an assembly method thereof, which can solve the problems of the background art. In order to solve the technical problems, the invention adopts the following technical scheme: The multi-stage energy consumption prefabricated UHPC anti-collision wall is arranged at the edge of a bridge deck platform and comprises a UHPC framework, a first U-shaped embedded rib, a second U-shaped embedded rib and an energy consumption connecting piece, wherein a reserved shear groove is formed in the bottom of the UHPC framework; the first U-shaped planted bars and the second U-shaped planted bars are both positioned in the reserved shear groove, the first U-shaped planted bars are connected with the top wall of the reserved shear groove, the second U-shaped planted bars are connected with the bridge deck platform, and a pouring hole communicated with the reserved shear groove is formed in the UHPC framework; The bottom of the UHPC framework is provided with a mounting groove for mounting the energy consumption connecting piece, and the UHPC framework is connected with the bridge deck platform through the energy consumption connecting piece. Further, a plastic energy dissipation material is arranged on one side of the UHPC framework far away from the edge of the bridge deck platform. Further, the energy consumption connecting piece comprises an upper connecting piece, an elliptical ring connecting piece and a lower connecting piece, wherein the upper connecting piece is arranged above the elliptical ring connecting piece in a semi-surrounding mode and fixedly connected with one side of the elliptical ring connecting piece, and the lower connecting piece is arranged below the elliptical ring connecting piece in a semi-surrounding mode and fixedly connected with one side of the elliptical ring connecting piece. Further, go up the connecting piece and be first L shape mount pad, the lateral wall of first L shape mount pad is connected with oval annular linking piece through the bolt, and the top of first L shape mount pad is provided with the peg that is used for being connected with the UHPC skeleton. Further, the lower connecting piece is a second L-shaped mounting seat, the side wall of the second L-shaped mounting seat is connected with the elliptical ring-shaped connecting piece through a bolt, and a bolt used for being connected with the bridge deck platform is arranged at the bottom of the second L-shaped mounting seat. Preferably, the inner side of the elliptical ring-shaped connecting piece is provided with a first reinforcing rib arranged along the circumferential direction and a plurality of second reinforcing ribs arranged at intervals along the width direction. Preferably, the thickness of the middle of the outer wall of the elliptical ring-shaped connecting piece is larger than that of the two sides, and the outer wall smoothly transits from the middle to the two sides. Preferably, the section of the reserved shear groove is trapezoid, and the internal casting material is ultra-high performance concrete. The application also provides an assembly method of the multi-stage energy consumption prefabricated UHPC anti-collision wall, which is used for the UHPC anti-collision w