Railway roadbed waterproof structure

Abstract

The utility model relates to the technical field of high polymer material, concretely relates to a railway roadbed waterproof structure, including concrete cushion, rubber geotechnical mesh cloth, asphalt pavement and basement waterproof unit, the basement waterproof unit includes the soil layer, sand cushion and macadam waterproof layer, through the sand cushion of laying on the top of the soil layer, the macadam waterproof layer of laying on the sand cushion, through the setting of sand cushion, the macadam waterproof layer plays the supporting action, and has certain drainage function, and through the setting of macadam waterproof layer simultaneously, can improve the waterproof performance of whole railway roadbed while improving the overall strength of railway roadbed.

Description

Technical Field

[0001] This utility model relates to the field of polymer materials technology, and in particular to a waterproof structure for railway subgrade. Background Technology

[0002] The railway subgrade is the structural component that bears the loads of trains and the track bed. The quality and stability of the subgrade are crucial for safe train operation. However, due to poor waterproofing, railway subgrades can suffer from subsidence, aging, and other defects, affecting railway safety and severely disrupting normal transportation.

[0003] To address the above issues, patent document CN202898931U discloses a waterproof structure for railway subgrade, characterized by comprising subgrade soil, PVC mortar, metal waterproof felt, concrete cushion layer, geogrid, and asphalt pavement. The subgrade soil is compacted and then coated with PVC mortar. A metal waterproof felt is laid on top of the PVC mortar, and a concrete cushion layer is placed on top of the metal waterproof felt. The thickness of the concrete cushion layer is 15-25mm, and the strength of the concrete cushion layer is C20. A geogrid is laid on top of the concrete cushion layer, and an asphalt pavement is placed on top of the geogrid.

[0004] However, the existing railway subgrade waterproofing structure is relatively simple, and its waterproofing performance and overall strength are not ideal. Utility Model Content

[0005] The purpose of this utility model is to provide a waterproof structure for railway subgrade, which solves the problems that the existing waterproof structures for railway subgrade are relatively simple and have insufficient waterproof performance and overall strength.

[0006] To achieve the above objectives, this utility model provides a waterproof structure for railway subgrade, comprising a concrete cushion layer, a rubber geogrid, an asphalt pavement, and a base waterproofing unit. The rubber geogrid is laid on top of the concrete cushion layer, and the asphalt pavement is laid on top of the rubber geogrid. The base waterproofing unit comprises a soil layer, a sand cushion layer, and a gravel waterproofing layer. The soil layer is compacted on the surface of the railway subgrade, the sand cushion layer is laid on top of the soil layer, the gravel waterproofing layer is laid on top of the sand cushion layer, and the concrete cushion layer is laid on top of the gravel waterproofing layer.

[0007] The gravel waterproof layer consists of a waterproof frame and a gravel layer. The waterproof frame is inserted above the subgrade layer and located above the sand cushion layer. The gravel layer is disposed inside the waterproof frame and is filled with a polymer waterproof coating.

[0008] The waterproof frame is composed of multiple waterproof plates and multiple sealing plates. The multiple waterproof plates are inserted above the soil layer, and the sealing plates are arranged between two adjacent soil layers.

[0009] The sealing plate includes a straight plate structure and an L-shaped plate structure. The sealing plate between two adjacent waterproof plates that are on the same straight line is a straight plate structure, and the sealing plate between two adjacent waterproof plates that are perpendicular to each other is an L-shaped plate structure.

[0010] Each of the waterproof panels includes a base plate and a baffle. The bottom of the base plate is provided with multiple spike structures, and the baffle is fixedly provided on the upper surface of the base plate. The two ends of the baffle are provided with slots, and the sealing plate corresponds to the slots. The baffle is arranged in an inclined structure.

[0011] The rubber geogrid includes an adhesive layer and a rubber fiber mesh layer. The rubber fiber mesh layer is laid on top of the concrete cushion layer through the adhesive layer. The rubber fiber mesh layer is made of rubber fiber and synthetic fiber.

[0012] This utility model discloses a waterproof structure for railway subgrade. By laying a sand cushion layer on top of the subgrade soil layer, and then laying a gravel waterproof layer on top of the sand cushion layer, the sand cushion layer provides support for the gravel waterproof layer and has a certain drainage function. At the same time, the gravel waterproof layer can improve the waterproof performance of the entire railway subgrade while also increasing the overall strength of the railway subgrade. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the waterproof structure for railway subgrade provided by this utility model.

[0015] Figure 2 This is the utility model Figure 1 Enlarged view of the local structure at point A.

[0016] Figure 3 This is a cross-sectional structural diagram of the waterproof railway subgrade structure provided by this utility model.

[0017] Figure 4 This is a structural schematic diagram of the waterproof membrane provided by this utility model.

[0018] 101-Concrete subbase, 102-Rubber fiber mesh layer, 103-Asphalt pavement, 104-Soil layer, 105-Sand subbase, 106-Adhesive layer, 107-Crushed stone layer, 108-Base plate, 109-Baffle, 110-Straight plate structure, 111-L-shaped plate structure, 112-Spike structure, 113-Slot. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Please see Figures 1 to 4 ,in Figure 1 This is a structural diagram of a waterproof railway subgrade. Figure 2 yes Figure 1 Enlarged view of the local structure at point A. Figure 3 This is a cross-sectional structural diagram of the waterproof structure of the railway subgrade. Figure 4 This is a structural diagram of the waterproof membrane.

[0021] This utility model provides a waterproof structure for railway subgrade, comprising a concrete cushion layer 101, a rubber geogrid, an asphalt pavement 103, and a base waterproof unit. The base waterproof unit includes a soil layer 104, a sand cushion layer 105, and a gravel waterproof layer. The gravel waterproof layer is composed of a waterproof frame and a gravel layer 107. The waterproof frame consists of multiple waterproof plates and multiple sealing plates. Each waterproof plate includes a base plate 108 and a baffle plate 109. This solution addresses the problems of existing railway subgrade waterproof structures being relatively simple and having insufficient waterproof performance and overall strength. It is understood that this solution can be used in the construction of railway subgrade waterproof structures.

[0022] In this specific embodiment, the rubber geogrid is laid on the concrete cushion layer 101, and the asphalt pavement 103 is laid on the rubber geogrid. The subgrade soil layer 104 is compacted on the surface of the railway subgrade. The sand cushion layer 105 is laid on top of the subgrade soil layer 104, and the gravel waterproof layer is laid on top of the sand cushion layer 105. The concrete cushion layer 101 is laid on top of the gravel waterproof layer. By laying the sand cushion layer 105 on top of the subgrade soil layer 104 and the gravel waterproof layer on top of the sand cushion layer 105, the sand cushion layer 105 provides support for the gravel waterproof layer and has a certain drainage function. At the same time, the gravel waterproof layer can improve the waterproof performance of the entire railway subgrade and improve the overall strength of the railway subgrade.

[0023] The sand cushion layer 105 has a thickness of 6-8cm and an average particle size of 1-5mm. The sand cushion layer 105 should be laid evenly, densely, and flat.

[0024] Secondly, the waterproof frame is inserted above the subgrade layer 104 and above the sand cushion layer 105. The interior of the waterproof frame contains a crushed stone layer 107 filled with a polymer waterproof coating. By inserting the waterproof frame around the subgrade layer 104, laying the crushed stone layer 107 inside the waterproof frame, and filling the gaps between the crushed stones in the crushed stone layer 107 with the polymer waterproof coating, the overall strength of the entire railway subgrade is improved through the installation of the crushed stone layer 107. The waterproof performance of the entire railway subgrade is also improved through the installation of the polymer waterproof coating. Here, the thickness of the crushed stone layer 107 is 5-10 cm, the average particle size of the crushed stone is 0.5-1 cm, and the crushed stone layer 107 should be laid evenly and densely. The polymer waterproof coating can be any one of polyurethane waterproof coating, acrylic waterproof coating, polymer cement coating, or silicone waterproof coating.

[0025] Meanwhile, multiple waterproofing plates are inserted above the subgrade 104, and sealing plates are provided between two adjacent subgrade 104. The installation of the waterproof frame is completed by the cooperation of multiple sealing plates and multiple waterproofing plates.

[0026] In addition, the sealing plate includes a straight plate structure 110 and an L-shaped plate structure 111. The sealing plate between two adjacent waterproof plates that are on the same straight line is a straight plate structure 110, and the sealing plate between two adjacent waterproof plates that are perpendicular to each other is an L-shaped plate structure 111.

[0027] Furthermore, the bottom of the base plate 108 is provided with a plurality of spike structures 112, and the baffle 109 is fixedly provided on the upper surface of the base plate 108. The two ends of the baffle 109 are provided with slots 113, and the sealing plate corresponds to the slots 113. The baffle 109 is arranged in an inclined structure. The base plate 108 is inserted into the upper surface of the outer periphery of the subgrade layer 104 through the spike structures 112, and the installation of the sealing plate is completed through the slots 113.

[0028] Furthermore, the rubber geogrid includes an adhesive layer 106 and a rubber fiber mesh layer 102. The rubber fiber mesh layer 102 is laid on top of the concrete cushion layer 101 through the adhesive layer 106. The rubber fiber mesh layer 102 is prepared by rubber fibers and synthetic fibers with the help of auxiliary materials. The auxiliary materials consist of additives and adhesives. The additives include UV protectants, antioxidants, stabilizers, antistatic agents, etc. Because the rubber fiber mesh layer 102 combines the flexibility of rubber and the reinforcing effect of fiber mesh, the material as a whole has high strength and stability, while also having good air permeability and water permeability, allowing free flow of air and moisture.

[0029] When using the waterproof structure for railway subgrade of this utility model, a sand cushion layer 105 is laid on top of the subgrade soil layer 104, and a gravel waterproof layer is laid on the sand cushion layer 105. The sand cushion layer 105 provides support for the gravel waterproof layer and has a certain drainage function. A waterproof frame is inserted around the subgrade soil layer 104, and a gravel layer 107 is laid inside the waterproof frame. A polymer waterproof coating is filled between the gravel in the gravel layer 107. The gravel layer 107 improves the overall strength of the entire railway subgrade, and the polymer waterproof coating improves the waterproof performance of the entire railway subgrade.

[0030] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A waterproof structure for railway subgrade, comprising a concrete subbase, a rubber geomesh, and an asphalt pavement, wherein the rubber geomesh is laid on top of the concrete subbase, and the asphalt pavement is laid on top of the rubber geomesh, characterized in that, It also includes a base waterproofing unit; The base waterproofing unit includes a plain soil layer, a sand cushion layer, and a crushed stone waterproofing layer. The plain soil layer is compacted on the surface of the railway subgrade. The sand cushion layer is laid on top of the plain soil layer. The crushed stone waterproofing layer is placed on top of the sand cushion layer. The concrete cushion layer is laid on top of the crushed stone waterproofing layer.

2. The waterproof structure for railway subgrade as described in claim 1, characterized in that, The gravel waterproof layer consists of a waterproof frame and a gravel layer. The waterproof frame is inserted above the soil layer and located above the sand cushion layer. The gravel layer is disposed inside the waterproof frame and is filled with a polymer waterproof coating.

3. The waterproof structure for railway subgrade as described in claim 2, characterized in that, The waterproof frame is composed of multiple waterproof plates and multiple sealing plates. The multiple waterproof plates are inserted above the soil layer, and the sealing plates are arranged between two adjacent soil layers.

4. The waterproof structure for railway subgrade as described in claim 3, characterized in that, The sealing plate includes a straight plate structure and an L-shaped plate structure. The sealing plate between two adjacent waterproof plates that are on the same straight line is a straight plate structure, and the sealing plate between two adjacent waterproof plates that are perpendicular to each other is an L-shaped plate structure.

5. The waterproof structure for railway subgrade as described in claim 4, characterized in that, Each of the waterproof panels includes a base plate and a baffle. The bottom of the base plate is provided with a plurality of spike structures, and the baffle is fixedly provided on the upper surface of the base plate. The two ends of the baffle are provided with slots, and the sealing plate corresponds to the slots. The baffle is arranged in an inclined structure.

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