A self-compacting concrete pouring device under the ballastless track slab of a high-speed railway bridge

Abstract

The invention discloses a self-compacting concrete pouring device under the ballastless track slab of a high-speed railway bridge, comprising a foundation, a base plate on the foundation, a ballastless track slab above the base plate, and a gap between the base plate and the ballastless track slab; a square frame-shaped fixed template is provided around the ballastless track slab; a movable template is inserted on the left and right sides of the fixed template; a control device is provided on the base plate, and the control device temporarily limits the movable template; the ballastless track slab comprises a pouring hole in the middle and observation holes on both sides thereof, and vertical cylinders are provided in the pouring hole and the observation holes; the vertical cylinder of the pouring hole is connected to an overflow pipe, and the overflow pipe is provided with an induction trigger device; when the self-compacting concrete poured in the vertical cylinder overflows into the overflow pipe, the induction trigger device senses it and triggers the control device to release the movable template, and the movable template moves in a direction away from the vertical cylinder under the pressure of the self-compacting concrete. The invention solves the problem of poor self-compacting concrete pouring effect at a turning point of a high-speed railway.

Description

Technical Field

[0001] The invention belongs to the field of ballastless track construction, and in particular relates to a self-compacting concrete pouring device under a ballastless track slab of a high-speed railway bridge. Background Art

[0002] At curves on high-speed railway bridges, the inside of the curve is lower than the outside, and the inclination is usually controlled within 15°. After the ballastless track slab is laid, self-compacting concrete needs to be poured between the base plate and the ballastless track slab. During pouring, the self-compacting concrete falls into the pouring position and automatically flows outward and flattens. As the self-compacting concrete flows and flattens toward the inside of the curve, a bubble layer forms between the lower end face of the ballastless track slab and the pouring hole. Existing formwork is designed by setting overflow ports at the four corners and inserting slurry retaining plates. As the self-compacting concrete is poured, the bubble layer cannot be discharged through the overflow port, resulting in hollowing and affecting the pouring quality. As the self-compacting concrete flows toward the outside of the track, because the height of the formwork is not much different from the height of the self-compacting concrete in the pouring hole, the self-compacting concrete does not have sufficient power to fill the formwork on the outside of the track, the flow rate is slow, and incomplete filling may occur, affecting the pouring quality. When the self-compacting concrete flows to the outside of the track, it will overflow the overflow trough if the overflow trough is not filled, causing waste; the existing overflow port is not suitable for pouring self-compacting concrete at the bend.

[0003] The existing overflow port prevents overflow by inserting a slurry retaining plate, which not only causes waste, but also requires the cooperation of multiple people to insert the slurry retaining plate, which is labor-intensive. It is also necessary to observe the pouring situation through an observation port. When pouring at a curve position, when the pouring cavity at the outer side of the curve is not filled, the self-compacting concrete has already entered the pouring hole and the observation hole. Therefore, it is impossible to observe whether the outer side of the track is filled. The pouring situation can only be judged after overflow at the outer side of the curve. There are serious wastes and inconveniences in cleaning and recycling. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of poor self-compacting concrete pouring effect at high-speed railway turning points and to propose a self-compacting concrete pouring device under the ballastless track slab of a high-speed railway bridge.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A self-compacting concrete pouring device under the ballastless track slab of a high-speed railway bridge comprises a foundation, a base plate with an inclined upper end surface is fixed on the foundation, a ballastless track slab is arranged above the base plate, and a space is provided between the base plate and the ballastless track slab; a square frame-shaped fixed template is provided around the ballastless track slab; movable templates are inserted on the left and right sides of the fixed template; a control device is provided on the base plate, and the control device temporarily limits the movable template; the ballastless track slab includes a pouring hole located in the middle and observation holes on both sides thereof, and vertical cylinders are provided in the pouring hole and the observation holes; the vertical cylinder of the pouring hole is connected to an overflow pipe, and the overflow pipe is provided with an induction trigger device; when the self-compacting concrete poured in the vertical cylinder overflows into the overflow pipe, the induction trigger device senses it and triggers the control device to release the movable template, and the movable template moves in a direction away from the vertical cylinder under the pressure of the self-compacting concrete.

[0007] As a further description of the above technical solution:

[0008] The fixed template has grooves on its left and right inner sides, and through grooves in left and right directions on its lower end surface. The through grooves are connected to the grooves, so that the cross-sections of the templates at the left and right ends of the fixed template are symmetrical inverted L-shaped.

[0009] As a further description of the above technical solution:

[0010] The movable template includes a short plate and a long plate perpendicular to each other. The long plate is placed in the through groove on the corresponding side, and the short plate is placed between the two grooves. When the movable template moves away from the vertical cylinder to the farthest end of its displacement, the short plate is just completely placed in the groove on the corresponding side.

[0011] As a further description of the above technical solution:

[0012] The control device includes a shell and a slider; a plug-in plate is fixed to the end of the movable template away from the vertical cylinder, a shell corresponding to the plug-in plate is fixed to the base plate, a slot is opened at the lower end of the shell, and the plug-in plate is placed in the slot; a plurality of blocks evenly distributed along the length direction are fixed to the plug-in plate, a stepped hole is opened between the upper inner side surface of the slot and the upper end surface of the shell, the stepped hole consists of a large hole and a small hole, one side of the upper inner side surface of the slot is a large hole, and one side of the upper end surface of the shell is a small hole, a slider moving along the axial direction of the large hole is inserted in the large hole, and the lower end surface of the slider is a V-shaped surface inclined toward the middle; a spring is provided between the bottom of the large hole and the slider.

[0013] As a further description of the above technical solution:

[0014] The induction trigger device includes a hinged plate and a rope; a hinged plate is hinged at the lower end of the overflow pipe near the vertical cylinder, and a torsion spring is provided at the hinge position of the hinged plate, which causes the unhinged end of the hinged plate to tilt upward; a through hole is opened in the overflow pipe and is placed above the unhinged end of the hinged plate, and there are multiple ropes in the through hole, and the ends of the ropes placed in the overflow pipe are fixed to the unhinged end of the hinged plate, and the ends of the ropes placed outside the overflow pipe pass through the small holes on the shell and are fixedly connected to the slider on the corresponding side.

[0015] As a further description of the above technical solution:

[0016] The base plate is provided with a recovery bucket placed below the overflow pipe for recovering the self-compacting concrete flowing into the overflow pipe.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] (1) The present invention allows the self-compacting concrete to be first piled up in the vertical cylinder to form a height difference, and then releases the movable template to fill the self-compacting concrete under a certain pressure. The method uses multiple pourings combined with a certain pressure to fill the self-compacting concrete, thereby avoiding the formation of a bubble layer at a low position on the inner side of the curve and avoiding the formation of defects in the self-compacting concrete caused by the slow flow of the self-compacting concrete due to insufficient pressure at a high position on the outer side of the curve.

[0019] (2) The present invention can intuitively judge the pouring situation within the interval by observing the length of the movable template extending to the outside of the shell. After the movable templates on the left and right sides are moved into place, the pouring can be stopped. There is no need to set overflow ports at the four corners and manually insert slurry retaining plates, which reduces labor and facilitates the cleaning and recovery of overflowed self-compacting concrete. As the pouring continues, the self-compacting concrete in the vertical cylinder accumulates again and flows into the overflow pipe, and the pouring can be stopped to avoid waste.

[0020] (3) The present invention adopts multiple pouring combined with a certain pressure to fill the self-compacting concrete, which accelerates the flow and has a good filling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 A top view of the present invention;

[0023] Figure 3 for Figure 2 Middle AA section view;

[0024] Figure 4 for Figure 3 Middle C is a partial enlarged view;

[0025] Figure 5 for Figure 2 Middle BB cross-section;

[0026] Figure 6 for Figure 5 Middle D is a partial enlarged view;

[0027] Figure 7 is a three-dimensional diagram of the mobile template 6;

[0028] Figure 8 It is a three-dimensional diagram of the fixed template 5 from an upward perspective;

[0029] Figure 9 is a perspective view of a ballastless track slab 3;

[0030] Figure 10 It is a cross-sectional schematic diagram of the prior art application at a bend. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figure 1-10 The present invention provides a technical solution for a self-compacting concrete 11 pouring device under a ballastless track slab 3 of a high-speed railway bridge:

[0033] A device for pouring self-compacting concrete 11 under the ballastless track slab 3 of a high-speed railway bridge comprises a foundation 1, on which is fixed a base plate 2 with an inclined upper end surface, a ballastless track slab 3 is provided above the base plate 2, and a gap 4 is formed between the base plate 2 and the ballastless track slab 3; a square frame-shaped fixed formwork 5 is provided around the ballastless track slab 3; movable formwork 6 is inserted on the left and right sides of the fixed formwork 5; a control device is provided on the base plate 2, which temporarily limits the movable formwork 6; the ballastless track slab 3 includes a pouring hole 7 located in the middle and observation holes 8 on both sides thereof, and vertical cylinders 9 are provided in the pouring hole 7 and the observation holes 8; the vertical cylinder 9 of the pouring hole 7 is connected to an overflow pipe 10, and the overflow pipe 10 is provided with an induction trigger device; when the self-compacting concrete 11 poured in the vertical cylinder 9 overflows into the overflow pipe 10, the induction trigger device senses it and triggers the control device to release the movable formwork 6, and the movable formwork 6 moves away from the vertical cylinder 9 under the pressure of the self-compacting concrete 11.

[0034] The fixed template 5 has grooves 12 on its left and right inner sides, and a through groove 13 in the left and right directions on its lower end face. The through groove 13 is connected to the groove 12, so that the cross-sections of the templates at the left and right ends of the fixed template 5 are symmetrical inverted L-shaped.

[0035] The movable template 6 includes a short plate 14 and a long plate 15 that are perpendicular to each other. The long plate 15 is placed in the through groove 13 on the corresponding side, and the short plate 14 is placed between the two grooves 12. When the movable template 6 moves away from the vertical cylinder 9 to the farthest end of its displacement, the short plate 14 is just completely placed in the groove 12 on the corresponding side.

[0036] The control device includes a shell 17 and a slider 22; a plug plate 16 is fixed to the end of the movable template 6 away from the vertical cylinder 9, and a shell 17 corresponding to the plug plate 16 is fixed to the base plate 2. A slot 18 is opened at the lower end of the shell 17, and the plug plate 16 is placed in the slot 18; a plurality of blocks 19 are fixed to the plug plate 16 and are evenly distributed along its length. A stepped hole is opened between the upper inner side surface of the slot 18 and the upper end surface of the shell 17. The stepped hole consists of a large hole 20 and a small hole 21. One side of the upper inner side surface of the slot 18 is the large hole 20, and one side of the upper end surface of the shell 17 is the small hole 21. A slider 22 that moves axially along the large hole 20 is inserted in the large hole 20, and the lower end surface of the slider 22 is a V-shaped surface inclined toward the middle; a spring 23 is provided between the bottom of the large hole 20 and the slider 22.

[0037] The induction trigger device includes a hinged plate 24 and a rope 26; a hinged plate 24 is hinged at the lower end of the overflow pipe 10 near the vertical cylinder 9, and a torsion spring is provided at the hinge position of the hinged plate 24, which causes the unhinged end of the hinged plate 24 to tilt upward; a through hole 25 is opened in the overflow pipe 10 and is located above the unhinged end of the hinged plate 24. There are multiple ropes 26 in the through hole 25, and the ends of the ropes 26 placed in the overflow pipe 10 are all fixed to the unhinged end of the hinged plate 24, and the ends of the ropes 26 placed outside the overflow pipe 10 pass through the small holes 21 on the shell 17 and are fixedly connected to the slider 22 on the corresponding side.

[0038] The base plate 2 is provided with a recovery bucket 27 placed below the overflow pipe 10 for recovering the self-compacting concrete 11 flowing into the overflow pipe 10 .

[0039] Working principle:

[0040] In the existing technology, due to the high speed of high-speed rail, its turning radius can be as long as 8 kilometers, which is very different from the size of a single ballastless track slab 3. Therefore, when laying the turning section, the same specification of ballastless track slab 3 is used as that of the straight section. Figure 10The figure shows the prior art, in which a limiting groove 28 is provided in the middle of the upper end surface of the base plate 2, so that the self-compacting concrete 11 can better combine with the base plate 2 during pouring; the position of the ballastless track slab 3 is accurately adjusted by the fine-adjustment claws 29; the ballastless track slab 3 is provided with a pouring hole 7 located in the middle and observation holes 8 located on both sides of the pouring hole 7; a clamping steel truss 30 is provided above the ballastless track slab 3, and tension rods 31 are provided at both ends of the clamping steel truss 30. The lower ends of the tension rods 31 are connected to the embedded steel bars 32 embedded in the base plate 2 on both sides. The ballastless track slab 3 is fixed through the clamping steel truss 30 to prevent the self-compacting concrete 11 from being poured and lifting the ballastless track slab 3. During pouring, the self-compacting concrete 11 falls into the pouring position and automatically flows outward and flattens. The position above it is shown as the horizontal line 33 in the figure. The self-compacting concrete 11 at the pouring hole 7 is higher than the horizontal line 33, which will cause the self-compacting concrete 11 to form a bubble layer 34 between the right side of the lower end surface of the ballastless track slab 3 and the pouring hole 7 when it flows and flattens to the right. As the self-compacting concrete 11 is poured, the bubble layer 34 cannot move to the lower right and therefore cannot be discharged. On the left side, the height of the formwork is not much different from the height of the self-compacting concrete 11 in the pouring hole 7. Therefore, the self-compacting concrete 11 does not have enough power when filling the left formwork, the flow rate is slow, and incomplete filling may occur.

[0041] When pouring the self-compacting concrete 11 of the present invention, the movable formwork 6 is first moved toward the direction of the vertical cylinder 9 so that the stopper 19 is placed between the left and right sliders 22; the self-compacting concrete 11 is poured downward through the vertical cylinder 9, first filling the limit groove 28 in the middle of the base plate 2, and then filling the middle position of the gap 4 between the base plate 2 and the ballastless track plate 3. As the pouring continues, the self-compacting concrete 11 in the vertical cylinder 9 gradually accumulates until it flows into the overflow pipe 10, which presses the hinged plate 24 downward to rotate downward, and pulls the slider 22 upward in the large hole 20 via the rope 26, thereby releasing the limit on the movable formwork 6. Under the pressure of the self-compacting concrete 11, the movable formwork 6 on the lower right side is pushed to move along the upper end surface of the base plate 2 to the lower right, and the self-compacting concrete 11 flows into the gap 4. It no longer overflows into the overflow pipe 10, and the height of the self-compacting concrete 11 in the vertical pipe 9 is reduced; the self-compacting concrete 11 in the overflow pipe 10 flows downward into the recovery bucket 27; the hinged plate 24 is reset under the action of the torsion spring and no longer pulls the rope 26 downward, and the spring 23 drives the slider 22 to reset. However, since the height of the self-compacting concrete 11 is reduced at this time, it cannot provide sufficient downward thrust. The reset of the slider 22 can block the next block 19, and limit the movable template 6 on the lower right side again; as the pouring continues, the self-compacting concrete 11 in the vertical cylinder 9 gradually accumulates, and the above process is repeated, so that the movable template 6 on the lower right side gradually moves downward, and each time it moves downward, the self-compacting concrete 11 in contact with it has a certain pressure, and fills downward under this pressure to avoid the formation of a bubble layer. It is worth noting that before the lower half of the interval 4 is filled, each accumulation of self-compacting concrete 11 will fill downwards, and there will not be enough self-compacting concrete 11 to push the upper left movable template 6 upward to the upper left, so the upper left movable template 6 stays in its original position.

[0042] After the lower half of the gap 4 is filled, the movable template 6 on the lower right side also moves to the rightmost end of its displacement, so that the short plate 14 of the movable template 6 on the lower right side is just completely placed in the groove 12 on the corresponding side.

[0043] As the pouring continues, the self-compacting concrete 11 in the vertical cylinder 9 accumulates again and flows into the overflow pipe 10, which will press the hinged plate 24 downward to rotate downward, and the slider 22 is pulled upward in the large hole 20 by the rope 26, thereby releasing the limit on the movable template 6. Under the pressure of the self-compacting concrete 11, the movable template 6 on the upper left side is pushed to move to the upper left along the upper end surface of the base plate 2; repeating the method similar to the above-mentioned movement of the movable template 6 on the lower right side to the lower right, the movable template 6 on the upper left side gradually moves to the upper left along the upper end surface of the base plate 2, and each time it moves to the upper left, the self-compacting concrete 11 in contact with it has a certain pressure, and under this pressure, it fills the upper half of the gap 4 until it is filled, and the movable template 6 on the upper left side also moves to the leftmost end of its displacement, so that the short plate 14 of the movable template 6 on the upper left side is just completely placed in the groove 12 on the corresponding side.

[0044] Since the pouring situation in the gap 4 can be judged intuitively by observing the length of the movable template 6 extending to the outside of the shell 17, the pouring can be stopped after the movable templates 6 on both sides are moved into place to prevent the self-compacting concrete 11 from overflowing too much and causing waste; as the pouring continues, the self-compacting concrete 11 in the vertical cylinder 9 accumulates again and flows into the overflow pipe 10, and the pouring can be stopped.

[0045] After the pouring is completed and the self-compacting concrete 11 is initially set, the template is disassembled and the movable template 6 is manually pushed back to its original position for the next use. Therefore, the device can be reused.

[0046] The above description is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, and all of these should be covered by the protection scope of the present invention.

Claims

1. A self-compacting concrete pouring device under the ballastless track slab of a high-speed railway bridge, characterized in that: The invention comprises a foundation (1), wherein a base plate (2) with an inclined upper end surface is fixed on the foundation (1), a ballastless track plate (3) is provided above the base plate (2), and a gap (4) is provided between the base plate (2) and the ballastless track plate (3); a square frame-shaped fixed template (5) is provided around the ballastless track plate (3); a movable template (6) is inserted on the left and right sides of the fixed template (5); a control device is provided on the base plate (2), and the control device temporarily limits the movable template (6); the ballastless track plate (3) includes a grouting hole (7) arranged in the middle and observation holes (8) arranged on both sides thereof, and vertical cylinders (9) are provided in the grouting hole (7) and the observation hole (8); an overflow pipe (10) is connected to the vertical cylinder (9) of the grouting hole (7), and an induction trigger device is provided on the overflow pipe (10); the self-compacting concrete (11) poured in the vertical cylinder (9) overflows to the overflow pipe ( 10), the induction trigger device senses and triggers the control device to release the movable template (6), and the movable template (6) moves in the direction away from the vertical cylinder (9) under the pressure of the self-compacting concrete (11); the fixed template (5) has grooves (12) on the left and right inner side surfaces, and the lower end surface of the fixed template (5) has through grooves (13) in the left and right directions, and the through grooves (13) are connected with the grooves (12), so that the cross-sections of the templates at the left and right ends of the fixed template (5) are symmetrical inverted L-shaped; the movable template (6) includes a short plate (14) and a long plate (15) perpendicular to each other, the long plate (15) is placed in the through groove (13) on the corresponding side, and the short plate (14) is placed between the two grooves (12), and when the movable template (6) moves in the direction away from the vertical cylinder (9) to the farthest end of its displacement, the short plate (14) is just completely placed in the groove (12) on the corresponding side.

2. The self-compacting concrete pouring device under the ballastless track slab of a high-speed railway bridge according to claim 1, characterized in that: The control device comprises a housing (17) and a slider (22); a plug-in plate (16) is fixed to the end of the movable template (6) away from the vertical cylinder (9); a housing (17) corresponding to the plug-in plate (16) is fixed to the base plate (2); a slot (18) is provided at the lower end of the housing (17); the plug-in plate (16) is placed in the slot (18); a plurality of stoppers (19) are fixed to the plug-in plate (16) along its length, and the upper inner side of the slot (18) is aligned with the housing (17). A stepped hole is opened between the upper end surfaces of the body (17), and the stepped hole consists of a large hole (20) and a small hole (21). One side of the upper inner side surface of the slot (18) is the large hole (20), and one side of the upper end surface of the shell (17) is the small hole (21). A slider (22) is inserted into the large hole (20) and moves axially along the large hole (20). The lower end surface of the slider (22) is a V-shaped surface inclined toward the middle; a spring (23) is provided between the bottom of the large hole (20) and the slider (22).

3. The self-compacting concrete pouring device under the ballastless track slab of a high-speed railway bridge according to claim 2, characterized in that: The induction trigger device includes a hinged plate (24) and a rope (26); a hinged plate (24) is hinged at the lower end of the overflow pipe (10) near the vertical cylinder (9), and a torsion spring is provided at the hinged position of the hinged plate (24), which causes the unhinged end of the hinged plate (24) to tilt upward; a through hole (25) is opened in the overflow pipe (10) and is located above the unhinged end of the hinged plate (24), and a plurality of ropes (26) are arranged in the through hole (25), and the ends of the ropes (26) placed in the overflow pipe (10) are fixed to the unhinged end of the hinged plate (24), and the ends of the ropes (26) placed outside the overflow pipe (10) pass through the small holes (21) on the shell (17) and are fixedly connected to the slider (22) on the corresponding side.

4. The self-compacting concrete pouring device under the ballastless track slab of a high-speed railway bridge according to claim 1, characterized in that: The base plate (2) is provided with a recovery bucket (27) placed below the overflow pipe (10) for recovering the self-compacting concrete (11) flowing into the overflow pipe (10).

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