Slurry blocking strip for concrete track slab pouring

Abstract

A concrete track slab pouring slurry blocking strip comprises at least one integrally flexible blocking piece with a flat surface, a via hole is formed in the blocking piece, the boundary dimension of the blocking piece is matched with the dimension of a steel bar penetrating gap of a steel mold, and the via hole is matched with the outer diameter of a steel bar. The whole mortar blocking strip is made of a flexible material, the side edge of the mortar blocking strip can be tightly contacted and sealed with a steel bar penetrating gap, the via hole of the mortar blocking strip can also be tightly contacted and sealed with an overhanging steel bar, the problem of mortar leakage during pouring of a track plate can be solved, the installation mode is simple, and the mortar blocking strip can be repeatedly used.

Description

Technical Field

[0001] This utility model relates to the field of railway maintenance section auxiliary equipment manufacturing, specifically to the grout-blocking strip used when casting track slabs using steel molds. Background Technology

[0002] Currently, in the field of rail transit, railway track slabs are mostly cast integrally using steel molds. This can be roughly described as follows: Figure 7 and Figure 8 As shown, concrete mortar is poured into the interior of the steel mold M. Reinforcing steel bars are penetrated through the side of the mold M via slots S, extending from inside the mold and working in conjunction with the internal reinforcing cage to provide structural strength for the formed track slab. Since the reinforcing steel bar penetration slots S are not merely pre-drilled holes for the reinforcing steel pipes M, but are rectangular or oblong slots, they need to be sealed during grouting to prevent leakage. Currently, temporary sealing with waste materials such as steel sheets or wooden chips is often used. However, due to tolerances or loose fits, gaps may form between the sealing sheets and the slots, leading to grout leakage.

[0003] A search revealed existing technical documents concerning concrete pouring sealing devices. For example, a utility model patent application with publication number "CN201649638U" entitled "Sealing Strip for Preventing Grout Leakage During Formwork Pouring" discloses a sealing strip for preventing grout leakage during formwork pouring. Its structure includes a strip-shaped plate-like main body with strip-shaped protrusions along the radial direction of the plate-like main body; at least two protrusions are present. In use, this sealing strip is inserted between adjacent formwork panels, reducing the gap between the panels. The pressure between the adjacent formwork panels completely seals the gap, thus achieving a seal between the formwork panels and preventing grout leakage during concrete pouring.

[0004] For example, the utility model authorization announcement document with publication number "CN221000650U" and title "A Combined Grout Stopping Strip for Square Piers that Can Be Directly Assembled with Existing Formwork" provides a combined grout stopping strip for square piers that can be directly assembled with existing formwork. It includes an air bladder and an air bladder support groove, the air bladder matching the air bladder support groove; the air bladder is fixedly connected to an inflation tube; the air bladder support groove is provided with a set of evenly distributed threaded holes; and the threaded holes are threadedly connected to bolts. The air bladder in the grout stopping strip assembly expands to seal gaps, achieving gap sealing.

[0005] The sealing strips provided in the aforementioned comparative documents do not take into account the sealing contact between the strips and the reinforcing bars, and therefore cannot solve the problem of grout leakage during track slab pouring. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a grout-sealing strip for concrete track slab pouring, comprising at least one integrally flexible sealing piece with a flat surface, wherein the sealing piece has a through hole, the outer dimensions of the sealing piece match the dimensions of the steel reinforcement through gap in the steel mold, and the through hole matches the outer diameter of the steel reinforcement.

[0007] Furthermore, the periphery of the sealing piece has a first magnetic attraction edge.

[0008] Furthermore, there is a fracture between the edge of the via and the side of the sealing plate.

[0009] Furthermore, the fracture portion is a fracture groove formed on the surface of the sealing piece.

[0010] Alternatively, the sealing piece can be assembled from separate pieces, with a semi-through hole at each end of the separate pieces, and the through hole is formed after the ends of the separate pieces are spliced ​​together.

[0011] Furthermore, the ends of the split pieces have a second magnetic edge.

[0012] Furthermore, the sealing plate has a step on its side, the height of which is the same as the thickness of the steel mold, and the first magnetic edge is located on the inner side of the step.

[0013] Furthermore, the via includes an upper via and a lower via, and the top of the sealing piece is semi-circular.

[0014] Compared with the prior art, the technical solution of this application has the following advantages: the grout sealing strip is made of flexible material, its side can be in close contact with the gap of the reinforcing bar to seal, and its through hole can also be in close contact with the protruding reinforcing bar to seal, which can solve the problem of grout leakage during track slab pouring, and the installation method is simple and can be reused. Attached Figure Description

[0015] Figure 1 Schematic diagram of grout blocking strip structure Figure 1 ;

[0016] Figure 2 Schematic diagram of grout blocking strip structure Figure 2 ;

[0017] Figure 3 Schematic diagram of the fracture section structure;

[0018] Figure 4 Schematic diagram of grout blocking strip structure Figure 3 ;

[0019] Figure 5 : Schematic diagram of the reinforcing steel bars filling the gap of the sealing plate;

[0020] Figure 6 Schematic diagram of grout blocking strip structure Figure 4 ;

[0021] Figure 7 Schematic diagram of steel formwork structure for track slab casting Figure 1 ;

[0022] Figure 8 Schematic diagram of steel formwork structure for track slab casting Figure 2 . Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] A grout-sealing strip for concrete track slabs includes at least one integral flexible sealing piece 1 with a flat surface. The sealing piece 1 has a through hole 2. The outer dimensions of the sealing piece 1 match the dimensions of the steel reinforcement through gap S of the steel mold M. The through hole 2 matches the outer diameter of the steel reinforcement.

[0025] Figure 1 The basic structure of the grout-blocking strip provided by this utility model is shown. The shape of the sealing piece 1 is adapted to the rebar penetration gap S, and is generally rectangular or waist-shaped, or waist-shaped at one end. The sealing piece 1 can be made of flexible materials such as rubber or polyurethane. Due to its certain flexible deformation capability, the side of the sealing piece 1 can be tightly fitted and sealed with the inner side of the rebar penetration gap S, which may not be completely flat, to prevent irregular gaps from causing grout leakage. Furthermore, the inner side of its through hole 2 can also be tightly fitted and sealed with the outer wall of the rebar, so that no gaps are formed after sealing. The friction generated by the contact can prevent the sealing piece 1 from loosening, thereby preventing grout leakage. When using it, the reinforcing bar is passed through the hole 2 of the sealing plate, and the sealing plate 1 is inserted into the gap S through which the reinforcing bar passes. Note that the flat side of the sealing plate 1 should face the gap S through which the reinforcing bar passes, and the inner surface of the sealing plate 1 should be as flush as possible with the inner surface of the steel mold M after insertion. This will make the surface of the track slab after casting flat and reduce the amount of manual repair work.

[0026] In a more preferred embodiment, the sealing piece 1 has a first magnetic attraction edge 11 on its periphery. The first magnetic attraction edge 11 is as follows: Figure 2 As shown, the sealing pieces can be distributed on both sides or around the perimeter. Similarly, the sealing piece 1 can be used as a whole or have magnetic material attached to its surface. The first magnetic edge 11 can be attracted to the inner side of the steel bar through the gap S, which facilitates disassembly and assembly and improves the sealing effect of the sealing piece 1, preventing it from loosening due to excessive mortar pressure during pouring.

[0027] In a more preferred embodiment, a fracture portion is also provided between the edge of the through-hole 2 and the side of the sealing piece 1. See details... Figure 2 The fractured portion keeps the sealing piece 1 connected as a whole, but it also allows the sealing piece 1 to be easily cut into separate pieces along the fractured portion. The purpose of this design can be found in [reference needed]. Figure 8 As shown in the diagram, one end of the protruding reinforcing bar is closed. If the sealing plate 1, which is assembled as a single unit, is used to fill the reinforcing bar penetration gap S, the reinforcing bar will not be able to pass through the sealing plate through hole 2. Therefore, it needs to be cut into separate parts for assembly, so that the assembled sealing plate 1 can fit snugly against the reinforcing bar penetration gap S and the protruding reinforcing bar. However, it should be noted that some protruding reinforcing bars are... Figure 7 As shown, the ends are separated, allowing assembly even without disassembling the sealing piece 1. Therefore, the fractured section can serve as a temporary and convenient disassembly component. If disassembly of the sealing piece 1 is required, the fractured section can be used for quick segmentation, ensuring that the assembled dimensions remain unchanged and regular after the through-hole 2 is divided. When disassembly is not required, the fractured section still connects the sealing piece 1 as a whole. Generally, this grout-blocking strip is not disassembled in its finished state; however, it can be flexibly chosen whether to disassemble it, or to disassemble it into several sections, depending on the on-site application.

[0028] One possible implementation of the fracture is as follows: Figure 3 As shown, the fracture portion is a fracture groove 12 formed on the surface of the sealing piece 1. The fracture groove 12 can be a V-shaped groove formed on one side, because the sealing piece 1 needs to ensure that one side is flat. The bottom of the fracture groove 12 is connected, but the thickness is already very small, so it can be easily torn open to divide the sealing piece 1 into several segments, and the fracture surface is flat after separation, so that the reassembled through hole 2 is still regular. Preferably, the fracture groove 12 can be formed radially along the through hole 2, dividing the through hole 2 into two uniform halves. Similarly, an alternative to the V-shaped groove can also be achieved by cutting the sealing piece 1 in half.

[0029] Based on considerations similar to the above embodiments, the sealing piece 1 can be assembled from separate pieces 101, with a semi-through hole 201 at each end of the separate pieces, and the through hole 2 is formed after the ends of the separate pieces are assembled. Specifically, it can be as follows: Figure 4 Or such as Figure 6 As shown. In this case, the sealing piece 1 is changed to a split design, requiring assembly for use, and the principle is similar to the above implementation method. However, there is a special application scenario in this case, in which it may not be convenient to design the sealing piece 1 with the fracture groove 12, and it must be designed as a split state. For example... Figure 4 As shown, if the outer diameter of the protruding reinforcing bar and the width of the reinforcing bar penetration gap S are approximately the same, then the width of the sealing plate 1 is also approximately the same as the width of the reinforcing bar penetration gap S. The diameter of the through hole 2 is also approximately the same as the width of the sealing plate 1, resulting in minimal contact between the edge of the through hole 2 and the side of the sealing plate 1, or even... Figure 4 As shown, there is no joint edge. Therefore, designing the sealing piece 1 as a separate piece 101 for assembly and splicing is the most preferred option.

[0030] In a more preferred embodiment, the end of the split piece 101 has a second magnetic edge 102. The second magnetic edge 102 can tightly fit and assemble the split pieces 101 together during assembly, ensuring that the assembled sealing piece 1 can withstand a certain grouting pressure.

[0031] To further improve the sealing effect of the steel mold M of the sealing piece 1, based on the aforementioned embodiments, the sealing piece 1 has a step 13 on its side. The height of the step 13 is the same as the thickness of the steel mold M, and the first magnetic edge 11 is located on the inner side of the step 13. This ensures that the first magnetic edge 11 adheres and seals to both the outer surface of the steel mold M and the inner side of the rebar penetration gap S, resulting in higher adhesion strength and a better sealing effect. The fact that the height of the step 13 is the same as the thickness of the steel mold M ensures that the inner side of the sealing piece 1 is flush with the inner side of the steel mold M after it is inserted into the rebar penetration gap S.

[0032] One specific implementation method is a double-through-hole design, where the number of through-holes 2 is obviously matched with the number of protruding reinforcing bars. The through-holes 2 include an upper through-hole 21 and a lower through-hole 22, and the top of the sealing plate 1 is semi-circular.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grout-sealing strip for concrete track slabs, characterized in that, It includes at least one integral flexible sealing piece (1) with a flat surface, a through hole (2) is provided on the sealing piece (1), the outer dimensions of the sealing piece (1) match the dimensions of the steel reinforcement through gap (S) of the steel mold (M), and the through hole (2) matches the outer diameter of the steel reinforcement.

2. The concrete track slab pouring grout sealing strip as described in claim 1, characterized in that, The sealing piece (1) has a first magnetic edge (11) on its periphery.

3. The concrete track slab pouring grout sealing strip as described in claim 2, characterized in that, There is also a fracture between the edge of the through hole (2) and the side of the sealing piece (1).

4. The concrete track slab pouring grout sealing strip as described in claim 3, characterized in that, The fractured part is a fracture groove (12) formed on the surface of the sealing piece (1).

5. The concrete track slab pouring grout sealing strip as described in claim 2, characterized in that, The sealing piece (1) can be assembled from split pieces (101), with a half-through hole (201) at the end of each split piece, and the ends of each split piece are spliced ​​together to form a through hole (2).

6. The concrete track slab pouring grout sealing strip as described in claim 5, characterized in that, The end of the split piece (101) has a second magnetic edge (102).

7. The concrete track slab pouring grout sealing strip as described in any one of claims 2 to 6, characterized in that, The sealing piece (1) has a step (13) on its side, the height of the step (13) is the same as the thickness of the steel mold (M), and the first magnetic edge (11) is located on the inner side of the step (13).

8. The concrete track slab pouring grout sealing strip as described in claim 5, characterized in that, The via (2) includes an upper via (21) and a lower via (22), and the top of the sealing piece (1) is semi-circular.

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