Ballastless track expansion joint sealing waterproof structure

Abstract

The invention belongs to the technical field of ballastless track waterproofing, and particularly relates to a ballastless track expansion joint sealing waterproof structure which comprises a first embedded frame, the first embedded frame is fixedly embedded in an expansion joint formed between two bases, and an elastic expansion mechanism is arranged in the first embedded frame. The elastic expansion mechanism abuts against the two opposite inner side walls of the first embedded frame, an isolation part is arranged at the top end of the first embedded frame and arranged at the top end of the interior of the expansion joint, grooves are formed in the tops of the side walls, close to each other, of the two bases, isolation layers are fixedly connected to the inner walls of the grooves, and the top ends of the two isolation layers are jointly and fixedly connected with a filling block. The top ends of the filling blocks are provided with multiple diversion trenches. The waterproof performance of the ballastless track expansion joint can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ballastless track waterproofing, and in particular relates to a ballastless track expansion joint sealing and waterproofing structure. Background Art

[0002] The CRTSⅠ and Ⅲ slab ballastless track bases of high-speed railways or passenger dedicated lines are set up in sections, and expansion joints are set between two adjacent sections of the base. The expansion joint is a structural joint with a certain width arranged along the line direction and perpendicular to the line direction. It completely separates the two adjacent sections of the base, allowing the base to freely expand and contract in the direction of the track extension, preventing cracks or damage to the track base structure due to temperature changes.

[0003] When designing ballastless track, elastic materials are generally filled in the expansion joints, and silicone or polyurethane sealants are used to seal the top and sides of the expansion joints to prevent rainfall from entering the surface of the roadbed subgrade below the base through the expansion joints and causing mud on the surface of the roadbed subgrade.

[0004] Because the train will generate huge shear stress at the expansion joint of the track base when running at high speed, when the shear stress acts on the formwork or foam board in the expansion joint, it is very easy to cause wear and damage to these materials. Once these materials are damaged, water leakage will occur.

[0005] In addition, after the railway has been opened for operation for a period of time, due to inadequate construction, aging of the sealant, expansion and contraction of the base plate and other reasons, the sealant may separate from the base concrete, causing rainwater to seep in and eventually causing mud to form on the surface of the roadbed.

[0006] Therefore, it is necessary to design a ballastless track expansion joint sealing and waterproof structure to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a ballastless track expansion joint sealing and waterproofing structure to solve the above-mentioned problem and achieve the purpose of improving the waterproofing performance of the ballastless track expansion joint.

[0008] To achieve the above-mentioned purpose, the present invention provides the following scheme: a ballastless track expansion joint sealing and waterproof structure, comprising a first embedded frame, the first embedded frame is fixedly embedded in the expansion joint formed between two bases, an elastic expansion mechanism is arranged inside the first embedded frame, the elastic expansion mechanism abuts against two opposite inner side walls of the first embedded frame, an isolation part is arranged at the top of the first embedded frame, the isolation part is arranged at the top of the expansion joint, a groove is provided at the top of the side walls of the two bases close to each other, an isolation layer is fixedly connected to the inner wall of the groove, a filling block is fixedly connected to the top of the two isolation layers, and a plurality of guide grooves are provided at the top of the filling block.

[0009] Preferably, the elastic expansion mechanism includes a first top plate and a second top plate arranged opposite to each other, the first top plate abutting against an inner side wall of the first embedded frame, the second top plate abutting against another opposite inner side wall of the first embedded frame, the number of the first top plates and the second top plates are both several and are arranged at equal intervals along the vertical direction inside the first embedded frame, and a plurality of expansion parts are arranged between the first top plate and the second top plate opposite to each other, and the plurality of expansion parts are arranged at equal intervals.

[0010] Preferably, the expansion portion includes a sleeve, one end of the sleeve is fixedly connected to the side wall of the first top plate, the outer wall of the sleeve is fixedly connected to a first baffle, the other end of the sleeve is internally slidably connected to one end of a central sliding column, the other end of the central sliding column is fixedly connected to the side wall of the second top plate, the outer wall of the central sliding column is fixedly connected to a second baffle, a spring is arranged between the first baffle and the second baffle, the spring is sleeved on the outside of the sleeve and the center sliding column, and the spring is in a compressed state.

[0011] Preferably, the isolation part includes a backing layer, the bottom end of the backing layer is fixedly connected to the top of the first embedded frame, the top of the backing layer is fixedly connected to an elastic layer, the top of the elastic layer is fixedly connected to a sealing layer, the backing layer, the elastic layer and the sealing layer are all arranged in the expansion joint and the side walls are sealed and connected to the side walls of the base.

[0012] Preferably, a telescopic layer is provided between the two isolation layers, the bottom end of the telescopic layer is fixedly connected to the top end of the sealing layer, the two side walls of the telescopic layer are respectively sealed and fixedly connected to the two isolation layer side walls, and the top end of the telescopic layer is sealed and fixedly connected to the bottom end of the filling block.

[0013] Preferably, the first embedded frame is made of MS sealant.

[0014] Preferably, the backing layer is MS sealant, to which 5.5-7wt% of nano silicon dioxide and 0.2-0.3wt% of defoaming agent are added, and the thickness of the backing layer is 8-10mm.

[0015] Preferably, the elastic layer is epoxy resin, 1-2.5wt% of nano zinc oxide is added into the epoxy resin, and the thickness of the elastic layer is 7-8.5mm.

[0016] Preferably, the particle size of the nano-silicon dioxide is 15-35 nm.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects:

[0018] The present invention can effectively prevent rainwater from entering under the base by providing the first inner front frame, the isolation layer and the isolation part. At the same time, the isolation layer is provided in two, which can well adapt to the changes of the expansion joint between the two bases and will not be damaged; the provided filling block and the plurality of guide grooves opened on the top thereof can prevent rainwater from accumulating and flowing under the base. The sealing and waterproof structure of the present invention can effectively seal and waterproof the expansion joint between the two bases by combining multiple means, thereby greatly extending the service life of the ballastless track. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0022] Figure 3 It is a schematic diagram of the structure of the elastic expansion mechanism of the present invention;

[0023] Figure 4 for Figure 3 A partial enlarged view of B in the middle;

[0024] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0025] Figure 6 This is a structural diagram of Embodiment 3 of the present invention;

[0026] Figure 7 is a cross-sectional view of Embodiment 3 of the present invention;

[0027] Figure 8 for Figure 7 A partial enlarged view of C in the middle.

[0028] Among them, 1. base; 2. first embedded frame; 3. isolation layer; 4. filling block; 5. guide groove; 6. backing layer; 7. elastic layer; 8. sealing layer; 9. telescopic layer; 10. first top plate; 11. second top plate; 12. sleeve; 13. first baffle; 14. center slide column; 15. second baffle; 16. spring; 17. expansion layer; 18. bottom plate; 19. second embedded frame; 20. center plate; 21. tapered strip. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Embodiment 1:

[0032] Reference Figures 1 to 4 As shown, this embodiment provides a ballastless track expansion joint sealing and waterproof structure, including a first embedded frame 2, the first embedded frame 2 is fixedly embedded in the expansion joint formed between the two bases 1, an elastic expansion mechanism is arranged inside the first embedded frame 2, the elastic expansion mechanism is in contact with the two opposite inner side walls of the first embedded frame 2, an isolation portion is arranged at the top of the first embedded frame 2, the isolation portion is arranged at the top of the expansion joint, a groove is provided at the top of the side walls of the two bases 1 close to each other, an isolation layer 3 is fixedly connected to the inner wall of the groove, a filling block 4 is fixedly connected to the top of the two isolation layers 3, and a plurality of guide grooves 5 are provided at the top of the filling block 4.

[0033] A further optimized solution is that the elastic expansion mechanism includes a first top plate 10 and a second top plate 11 arranged opposite to each other, the first top plate 10 abuts against an inner wall of the first embedded frame 2, and the second top plate 11 abuts against another opposite inner wall of the first embedded frame 2. The number of first top plates 10 and second top plates 11 are both multiple and are evenly spaced along the vertical direction inside the first embedded frame 2. A number of expansion parts are arranged between the first top plates 10 and the second top plates 11 opposite to each other, and the number of expansion parts are evenly spaced.

[0034] A further optimized solution is that the expansion portion includes a sleeve 12, one end of the sleeve 12 is fixedly connected to the side wall of the first top plate 10, the outer wall of the sleeve 12 is fixedly connected with a first baffle 13, the other end of the sleeve 12 is internally slidably connected with one end of a center sliding column 14, the other end of the center sliding column 14 is fixedly connected to the side wall of the second top plate 11, the outer wall of the center sliding column 14 is fixedly connected with a second baffle 15, a spring 16 is arranged between the first baffle 13 and the second baffle 15, the spring 16 is sleeved on the outside of the sleeve 12 and the center sliding column 14, and the spring 16 is in a compressed state.

[0035] The width of the first embedded frame 2 is matched with the width of the expansion joint. After the first embedded frame 2 is embedded and installed in the expansion joint, the spring 16 expands and presses the first baffle plate 13 and the second baffle plate 15 at both ends thereof, driving the central sliding column 14 to move in the direction away from the sleeve 12, thereby pushing the first top plate 10 and the second top plate 11 in two directions away from each other. The first top plate 10 and the second top plate 11 are respectively abutted against the two opposite inner walls of the first embedded frame 2, so that the width of the first embedded frame 2 is increased and the expansion joint is fully filled. At the same time, the outer wall of the first embedded frame 2 is tightly fitted with the inner wall of the expansion joint, effectively preventing rainwater from flowing into the base 1 along the gap between the two.

[0036] A further optimized solution is that the isolation part includes a backing layer 6, the bottom end of the backing layer 6 is fixedly connected to the top of the first embedded frame 2, the top of the backing layer 6 is fixedly connected to an elastic layer 7, the top of the elastic layer 7 is fixedly connected to a sealing layer 8, the backing layer 6, the elastic layer 7, and the sealing layer 8 are all arranged in the expansion joint and the side walls are sealed and connected to the side walls of the base 1.

[0037] By sequentially arranging the sealing layer 8, the elastic layer 7 and the backing layer 6 from top to bottom, multiple sealing protections can be formed for the top of the expansion joint, effectively preventing rainwater from penetrating into the expansion joint.

[0038] A further optimized solution is that a telescopic layer 9 is arranged between the two isolation layers 3, the bottom end of the telescopic layer 9 is fixedly connected to the top end of the sealing layer 8, the two side walls of the telescopic layer 9 are respectively sealed and fixedly connected to the side walls of the two isolation layers 3, and the top end of the telescopic layer 9 is sealed and fixedly connected to the bottom end of the filling block 4.

[0039] The expansion layer 9 can expand and contract freely in the horizontal direction to adapt to the closeness or distance between the two adjacent bases 1 caused by thermal expansion and contraction, thereby driving the two isolation layers 3 to move toward or away from each other, ensuring that the two isolation layers 3 maintain a sealing effect on the expansion joint below them under any movement.

[0040] According to a further optimization scheme, the material of the first embedded frame 2 is MS sealant.

[0041] The MS sealant enables the first embedded frame 2 to have good elasticity and sealing effect, adapt to the size change of the expansion joint, and ensure a good waterproof effect on the expansion joint.

[0042] According to a further optimized solution, the backing layer 6 is MS sealant, 5.5-7wt% of nano silicon dioxide and 0.2-0.3wt% of defoaming agent are added to the MS sealant, and the thickness of the backing layer 6 is 8-10 mm.

[0043] Silicon dioxide and defoaming agent can prevent the backing layer 6 from generating bubbles during the casting process and ensure the mechanical properties and sealing effect after molding.

[0044] According to a further optimized solution, the elastic layer 7 is epoxy resin, 1-2.5 wt % of nano zinc oxide is added into the epoxy resin, and the thickness of the elastic layer 7 is 7-8.5 mm.

[0045] Zinc oxide can ensure the mechanical properties and sealing effect of the elastic layer 7 after molding.

[0046] The solution was further optimized, and the particle size of nano-silicon dioxide was 15-35nm.

[0047] The working process of this embodiment is as follows:

[0048] When the expansion joint is sealed and waterproofed, the first embedded frame 2 is first embedded and installed into the inner bottom end of the expansion joint, and then, under the action of the expansion elastic force of the spring 16, the two opposite outer side walls of the first embedded frame 2 are tightly fitted on the two inner side walls of the expansion joint, and then the backing layer 6, the elastic layer 7 and the sealing layer 8 are laid in sequence from bottom to top on the top of the first embedded frame 2, and then the isolation layers 3 are laid in the grooves of the two bases 1 respectively, and then the expansion layer 9 is laid between the adjacent ends of the two isolation layers 3, and finally the filling block 4 is installed on the top of the two isolation layers 3 and the expansion layer 9, and a plurality of guide grooves 5 are opened on the top of the filling block 4.

[0049] Embodiment 2:

[0050] Reference Figure 5 As shown, the difference between this embodiment and the first embodiment is that an additional groove is opened on one side of the groove at the top of the base 1, and an expansion layer 17 is fixedly embedded in the additional groove. The expansion layer 17 is an inverted L-shape, and the horizontal section of the expansion layer 17 is located at the top and its end is sealed and fixedly connected to the end of the isolation layer 3. In this embodiment, the expansion layer 17 can seal and waterproof the fitting seam between the isolation layer 3 and the groove to prevent rainwater from entering the fitting seam.

[0051] Embodiment three:

[0052] Reference Figures 6 to 8As shown, the difference between this embodiment and the first embodiment is that the bottom of the side walls of the two bases 1 close to each other are respectively provided with a clearance groove, the two clearance grooves are connected to the expansion joint, and a bottom plate 18 is fixedly embedded in the two clearance grooves. The middle of the top of the bottom plate 18 is fixedly connected to the bottom end of a vertically arranged center plate 20. The center plate 20 is located at the center of the expansion joint. A second embedded frame 19 is sleeved on the outside of the center plate 20. The outer wall of the second embedded frame 19 is tightly fitted with the inner wall of the expansion joint. The outer wall of the center plate 20 is provided with a plurality of tapered strips 21. The tapered strips 21 are provided on the outer wall of the center plate 20. The strip 21 fits tightly with the inner wall of the second inner frame 19, the outer contour dimensions of the center plate 20 and the conical strip 21 are larger than the inner contour dimensions of the second inner frame 19, and the second inner frame 19 is made of elastic material. In this embodiment, the second inner frame 19 is sleeved on the outside of the center plate 20. By utilizing the relationship that the outer contour dimensions of the center plate 20 and the conical strip 21 are larger than the inner contour dimensions of the second inner frame 19 and the elastic characteristics of the material of the second inner frame 19, the second inner frame 19 can form an effective sealing and waterproof effect on the expansion joint.

[0053] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] The embodiments described above are only descriptions of the preferred modes 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 made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A ballastless track expansion joint sealing and waterproofing structure, characterized in that: The invention comprises a first embedded frame (2), wherein the first embedded frame (2) is fixedly embedded in the expansion joint formed between the two bases (1), an elastic expansion mechanism is arranged inside the first embedded frame (2), the elastic expansion mechanism is in contact with two opposite inner side walls of the first embedded frame (2), an isolation portion is arranged at the top of the first embedded frame (2), the isolation portion is arranged at the top of the expansion joint, a groove is provided at the top of the side walls of the two bases (1) close to each other, an isolation layer (3) is fixedly connected to the inner wall of the groove, a filling block (4) is fixedly connected to the top of the two isolation layers (3), and a plurality of guide grooves (5) are provided at the top of the filling block (4).

2. The ballastless track expansion joint sealing and waterproof structure according to claim 1, characterized in that: The elastic expansion mechanism comprises a first top plate (10) and a second top plate (11) which are arranged opposite to each other, wherein the first top plate (10) abuts against an inner side wall of the first embedded frame (2), and the second top plate (11) abuts against another inner side wall of the first embedded frame (2), the first top plates (10) and the second top plates (11) are both multiple in number and are evenly spaced in the vertical direction inside the first embedded frame (2), and a plurality of expansion parts are arranged between the first top plates (10) and the second top plates (11) which are opposite to each other, and the plurality of expansion parts are evenly spaced.

3. The ballastless track expansion joint sealing and waterproof structure according to claim 2, characterized in that: The expansion portion comprises a sleeve (12), one end of the sleeve (12) is fixedly connected to the side wall of the first top plate (10), the outer wall of the sleeve (12) is fixedly connected to a first baffle (13), the other end of the sleeve (12) is internally slidably connected to one end of a central sliding column (14), the other end of the central sliding column (14) is fixedly connected to the side wall of the second top plate (11), the outer wall of the central sliding column (14) is fixedly connected to a second baffle (15), a spring (16) is arranged between the first baffle (13) and the second baffle (15), the spring (16) is sleeved on the outside of the sleeve (12) and the central sliding column (14), and the spring (16) is in a compressed state.

4. The ballastless track expansion joint sealing and waterproof structure according to claim 1, characterized in that: The isolation portion comprises a backing layer (6), the bottom end of the backing layer (6) is fixedly connected to the top end of the first embedded frame (2), the top end of the backing layer (6) is fixedly connected to an elastic layer (7), the top end of the elastic layer (7) is fixedly connected to a sealing layer (8), the backing layer (6), the elastic layer (7), and the sealing layer (8) are all arranged in the expansion joint and the side walls are all sealed to the side walls of the base (1).

5. The ballastless track expansion joint sealing and waterproof structure according to claim 4, characterized in that: A telescopic layer (9) is provided between the two isolation layers (3); the bottom end of the telescopic layer (9) is fixedly connected to the top end of the sealing layer (8); the two side walls of the telescopic layer (9) are respectively sealed and fixedly connected to the side walls of the two isolation layers (3); and the top end of the telescopic layer (9) is sealed and fixedly connected to the bottom end of the filling block (4).

6. The ballastless track expansion joint sealing and waterproof structure according to claim 1, characterized in that: The material of the first embedded frame (2) is MS sealant.

7. The ballastless track expansion joint sealing and waterproof structure according to claim 4, characterized in that: The backing layer (6) is MS sealant, to which 5.5-7wt% of nano silicon dioxide and 0.2-0.3wt% of defoaming agent are added, and the thickness of the backing layer (6) is 8-10mm.

8. The ballastless track expansion joint sealing and waterproofing structure according to claim 4, characterized in that: The elastic layer (7) is epoxy resin, 1-2.5 wt% of nano zinc oxide is added into the epoxy resin, and the thickness of the elastic layer (7) is 7-8.5 mm.

9. The ballastless track expansion joint sealing and waterproof structure according to claim 7, characterized in that: The particle size of the nano silicon dioxide is 15-35 nm.

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