Steel plate constraint fiber concrete anti-collision wall and construction method

Abstract

The invention discloses a steel plate constraint fiber concrete anti-collision wall and a construction method. Train derailment is a small-probability event, and can seriously threaten the safety of buildings / structures along a railway once the train derailment occurs. The device is arranged between an arrival-departure line and a main line and comprises a front steel plate and a back steel plate, and an energy absorption layer is arranged on the back of the front steel plate; a steel reinforcement framework is arranged between the front steel plate and the back steel plate, and fiber concrete is poured between the front steel plate and the back steel plate. And the front steel plate and the energy absorption layer form an impact surface in a gluing connection mode. The front steel plate can play a guiding role, when a train and other impact bodies make contact with the anti-collision wall, the impact bodies can be guided to slide forwards, and impact energy is consumed through friction of rails, sleepers, ballast beds and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of railway construction, and in particular relates to a steel plate constrained fiber concrete anti-collision wall and a construction method. Background Art

[0002] With the continuous advancement of railway construction at home and abroad, more and more large railway stations will be put into use, and the density of railway transportation is increasing. Although train derailment is a low-probability event, once it happens, it will seriously threaten the safety of buildings and structures along the railway. As a passenger station for personnel evacuation, if the structural columns near the track are continuously damaged after being hit by a derailed train, it may cause the continuous collapse of the station building or canopy structure, greatly increasing the safety hazard of the station building. Summary of the invention

[0003] In order to make up for the deficiencies of the prior art, the present invention provides a steel plate constrained fiber concrete crash barrier and a construction method, which increases the energy absorption and consumption capacity of the crash barrier and reduces the impact on key railway facilities and components after a train derailment.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A steel plate-constrained fiber concrete anti-collision wall is arranged between the departure line and the main line, comprising a front steel plate and a back steel plate, wherein an energy absorbing layer is arranged on the back of the front steel plate;

[0006] A steel bar skeleton is arranged between the front steel plate and the back steel plate, and fiber concrete is poured therein.

[0007] Furthermore, the front steel plate and the energy absorbing layer are connected by gluing to form an impact surface.

[0008] Furthermore, the front steel plate and the steel reinforcement frame are connected by welding through anchor bars.

[0009] Furthermore, the steel bar skeleton includes vertically arranged reserved dowel bars and transversely arranged transverse steel bars, and the reserved dowel bars and the transverse steel bars are tied and connected.

[0010] Furthermore, the front steel plate is connected to the back steel plate with tie bars at intervals of about 0.2m, and the connection method is welding to form a whole.

[0011] Furthermore, the energy absorbing layer is made of resin or rubber-like flexible material and has a honeycomb or mesh structure.

[0012] Furthermore, fiber concrete is mixed with fibers, and the fiber material is metal fiber or synthetic fiber.

[0013] Furthermore, the dowel bars are connected to the lower rail-bearing layer or foundation.

[0014] A construction method for a steel plate-constrained fiber concrete anti-collision wall comprises the following steps:

[0015] Step 1: Attach the energy absorbing layer to the front steel plate by gluing;

[0016] Step 2: Tie the horizontal steel bars and vertical steel bars together to form a steel bar skeleton;

[0017] Step 3: Spot weld the anchor bars on the front steel plate and fix the steel bar skeleton to the front steel plate;

[0018] Step 4: Connect the back steel plate and the front steel plate into a whole by welding;

[0019] Step 5: insert the track-bearing layer or the reserved steel bars of the foundation into the whole consisting of the front steel plate, the energy-absorbing layer, the steel bar skeleton and the back steel plate;

[0020] Step 6: Add the fiber into the concrete in a certain proportion and pour and vibrate to make it dense, so as to form a steel plate-constrained fiber concrete wall.

[0021] Beneficial effects of the present invention:

[0022] 1) The front steel plate and the back steel plate of the present invention can also serve as concrete formwork, reducing the number of on-site formwork tools;

[0023] 2) The front steel plate of the present invention can play a guiding role. When an impact body such as a train contacts the crash barrier, it can be guided to slide forward, and the impact energy can be consumed by friction of the track, sleeper, and ballast.

[0024] 3) The front steel plate and the back steel plate of the present invention are connected as a whole through anchor bars, which has better integrity, and the crash barrier has higher ductility under impact load.

[0025] 4) The front steel plate of the present invention has an energy absorbing layer on the back side, which can absorb the impact load through deformation;

[0026] 5) The internal concrete of the present invention adopts fiber concrete. Under the impact load, the internal fibers of the concrete break to absorb the impact energy, and the deformed and broken concrete is connected through the fibers to avoid the rapid splashing of concrete to cause secondary damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the connection between the anti-collision wall and the foundation of the present invention;

[0029] Figure 3 This is a schematic diagram of the connection between the front steel plate and the energy absorbing layer of the present invention;

[0030] Figure 4 This is a large-scale drawing of the front steel plate of the present invention;

[0031] Figure 5 This is a schematic diagram of the connection between the front steel plate and the back steel plate of the present invention;

[0032] Figure 6 It is the overall structural layout diagram of the present invention;

[0033] In the figure, 1-steel plate constrained concrete crash barrier, 2-front steel plate, 3-energy absorption layer, 4-fiber concrete, 5-back steel plate, 6-inserted reinforcement, 7-transverse reinforcement, 8-anchor reinforcement. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with specific implementation modes.

[0035] like Figure 6 As shown, the steel plate restrained fiber concrete anti-collision wall of the present invention is arranged between the departure line and the main line, and is used to protect the train from directly impacting the line columns after derailment;

[0036] like Figure 1 , 2 As shown in FIG. 3 , the present invention comprises a front steel plate 2 and a back steel plate 5, wherein an energy absorbing layer 3 is arranged on the back of the front steel plate 2; the front steel plate 2 and the energy absorbing layer 3 are connected by gluing to form an impact surface; the front steel plate can play a guiding role, and when an impact body such as a train contacts the crash barrier, it can be guided to slide forward, and the impact energy can be consumed by friction of tracks, sleepers, and roadbeds.

[0037] The energy absorbing layer 3 is made of a resin or rubber-like flexible material and has a honeycomb or mesh structure. The energy absorbing layer can absorb impact loads by deformation.

[0038] A steel skeleton is arranged between the front steel plate 2 and the back steel plate 5, and fiber concrete 4 is poured; the fiber concrete 4 is mixed with fibers, and the fiber material is metal fiber or synthetic fiber. Under the impact load, the fibers inside the concrete break to absorb the impact energy, and the deformed and broken concrete is connected through the fibers to avoid secondary damage caused by concrete splashing. The front steel plate and the back steel plate can also serve as concrete formwork, reducing the number of on-site formwork tools.

[0039] The front steel plate 2 and the steel frame are welded and connected by anchor bars 8; the steel frame includes vertically arranged reserved dowel bars 6 and horizontally arranged transverse steel bars 7, and the reserved dowel bars 6 and the transverse steel bars 7 are tied and connected. The dowel bars 6 are connected to the lower rail bearing layer or foundation.

[0040] like Figure 4 , 5 As shown, the front steel plate 2 is connected to the back steel plate 5 with tie bars at intervals of about 0.2m, and the connection method is welding to form a whole.

[0041] 9. A construction method for a steel plate-constrained fiber concrete anti-collision wall, characterized in that it comprises the following steps:

[0042] Step 1: attach the energy absorbing layer 3 to the front steel plate 2 by gluing;

[0043] Step 2: Tie the horizontal steel bars and vertical steel bars together to form a steel bar skeleton;

[0044] Step 3: Spot weld the anchor bars on the front steel plate and fix the steel bar skeleton to the front steel plate;

[0045] Step 4: Connect the back steel plate and the front steel plate into a whole by welding;

[0046] Step 5: insert the track-bearing layer or the reserved steel bars of the foundation into the whole consisting of the front steel plate, the energy-absorbing layer, the steel bar skeleton and the back steel plate;

[0047] Step 6: Add the fiber into the concrete in a certain proportion and pour and vibrate to make it dense, so as to form a steel plate-constrained fiber concrete wall.

[0048] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The content of the present invention is not limited to the embodiments listed, and any equivalent changes made to the technical solution of the present invention by ordinary technicians in this field after reading the description of the present invention are covered by the claims of the present invention.

Claims

1. A steel plate constrained fiber concrete anti-collision wall, characterized by: It is arranged between the departure line and the main line, and comprises a front steel plate (2) and a back steel plate (5), wherein an energy absorbing layer (3) is arranged on the back of the front steel plate (2); A steel frame is provided between the front steel plate (2) and the back steel plate (5), and fiber concrete (4) is poured thereon.

2. The steel plate constrained fiber concrete crash barrier according to claim 1, characterized in that: The front steel plate (2) and the energy absorbing layer (3) are connected by gluing to form an impact surface.

3. The steel plate constrained fiber concrete crash barrier according to claim 2, characterized in that: The front steel plate (2) and the steel reinforcement frame are connected by welding via anchor bars (8).

4. The steel plate constrained fiber concrete crash barrier according to claim 3, characterized in that: The steel bar skeleton comprises vertically arranged reserved dowel bars (6) and transversely arranged transverse steel bars (7), and the reserved dowel bars (6) and the transverse steel bars (7) are tied and connected.

5. The steel plate constrained fiber concrete crash barrier according to claim 4, characterized in that: The front steel plate (2) is connected to the back steel plate (5) by tie bars arranged at intervals of about 0.2 m, and the connection is made by welding to form a whole.

6. The steel plate constrained fiber concrete crash barrier according to claim 5, characterized in that: The energy absorbing layer (3) is made of resin or rubber-like flexible material and has a honeycomb or mesh structure.

7. The steel plate constrained fiber concrete crash barrier according to claim 8, characterized in that: Fiber concrete (4) Concrete mixed with fibers, the fiber material is metal fiber or synthetic fiber.

8. The steel plate constrained fiber concrete crash barrier according to claim 7, characterized in that: The dowel bars (6) are connected to the lower rail bearing layer or foundation.

9. A construction method for a steel plate-constrained fiber concrete crash barrier, characterized in that: The steps include: Step 1: attaching the energy absorbing layer (3) to the front steel plate (2) by gluing; Step 2: Tie the horizontal steel bars and vertical steel bars together to form a steel bar skeleton; Step 3: Spot weld the anchor bars on the front steel plate and fix the steel bar skeleton to the front steel plate; Step 4: Connect the back steel plate and the front steel plate into a whole by welding; Step 5: insert the track-bearing layer or the reserved steel bars of the foundation into the whole consisting of the front steel plate, the energy-absorbing layer, the steel bar skeleton and the back steel plate; Step 6: Add the fiber into the concrete in a certain proportion and pour and vibrate to make it dense, so as to form a steel plate-constrained fiber concrete wall.

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