Waterproof treatment structure for point switch pit

Abstract

The utility model relates to the technical field of rail transit, in particular to a waterproof treatment structure at a point switch pit, which comprises a waterproof concrete structure, and the point switch pit is arranged in the waterproof concrete structure. A polymer cement waterproof mortar layer and a waterproof roll layer are sequentially arranged between the bottom of the waterproof concrete structure and the structure bottom plate from bottom to top, and a cement-based permeable crystallization type waterproof coating layer is coated on the pit wall of the point switch pit. The waterproof structure has the advantages of being capable of effectively achieving waterproof at the position of the point switch pit, providing an excellent waterproof effect, effectively ensuring the use performance and the service life of the point switch, and being convenient to construct and suitable for popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transportation, in particular to a waterproof treatment structure for a switch pit. Background Art

[0002] A switch is an important signal infrastructure device used to reliably change the position of switches, change the direction of switch opening, lock the switch point rail, and reflect the position of switches. It is one of the common devices in current rail transit lines.

[0003] Currently, due to installation and operational requirements, the bottom of the pit for a switch machine is typically lower than the trackbed surface. This can easily lead to water accumulation in the pit, which can further damage the switch machine, affecting not only the performance and service life of the equipment itself, but also the normal operation of the rail transit line. This water accumulation includes water flowing upwards between the civil engineering base plate and the trackbed structure. Furthermore, water in the pit can penetrate into the trackbed through the siphon effect, compromising the durability of the trackbed structure.

[0004] Therefore, how to waterproof the switch pit is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The purpose of this utility model is to provide a waterproof treatment structure for a switch pit based on the above-mentioned deficiencies of the existing technology, and to achieve effective waterproofing of the switch pit by setting targeted waterproof measures at the connection position between the switch pit and the structural base plate and at the position of the switch pit itself.

[0006] The purpose of this utility model is achieved by the following technical solutions:

[0007] A waterproofing treatment structure for a switch pit is characterized by comprising a waterproof concrete structure, wherein a switch pit is arranged in the waterproof concrete structure, a polymer cement waterproof mortar layer and a waterproof membrane layer are sequentially arranged from bottom to top between the bottom of the waterproof concrete structure and the structural base plate, and a cement-based penetrating crystalline waterproof coating layer is coated on the pit wall of the switch pit.

[0008] The waterproof roll material layer comprises at least two layers of polyethylene polypropylene waterproof roll materials, and each layer of the polyethylene polypropylene waterproof roll materials is bonded together by a polymer cement adhesive.

[0009] An interface agent layer is provided between the polymer cement waterproof mortar layer and the structural base plate.

[0010] A steel mesh is arranged in the waterproof concrete structure.

[0011] The advantages of the utility model are: it can effectively realize waterproofing of the switch pit, provide excellent waterproofing effect, effectively ensure the performance and service life of the switch, is easy to construct, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 for Figure 1 AA sectional view;

[0014] Figure 3 This is a structural diagram of the waterproofing treatment of the switch pit adjacent to the armpit corner of the structure in this utility model. DETAILED DESCRIPTION

[0015] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0016] like Figure 1-3 As shown in the figure, marks 1-7 respectively represent: switch pit 1, waterproof concrete structure 2, roadbed concrete structure 3, interface agent 4, polymer cement waterproof mortar 5, polyethylene polypropylene waterproof membrane 6, cement-based penetrating crystalline waterproof coating 7.

[0017] Example: Figures 1 to 3 As shown, the waterproof structure at the switch pit in this embodiment is used for waterproofing the switch pit for installing the switch on the rail transit line.

[0018] Specifically, combined Figure 1 and Figure 2 As shown, the waterproof treatment structure of this embodiment first uses a waterproof concrete structure 2 as the main structure at the switch pit 1 where the switch is installed. The waterproof concrete structure 2 is connected between adjacent roadbed concrete structures 3. By directly using waterproof concrete for the concrete of the switch pit 1 section, the waterproof effect of the switch pit 1 is essentially improved.

[0019] In this embodiment, a steel mesh is provided inside the waterproof concrete structure 2 to ensure the structural strength.

[0020] The waterproof concrete structure 2 and the trackbed concrete structure 3 are installed on the structural base plate according to the design requirements of the rail transit line. A waterproofing measure is installed between the waterproof concrete structure 2 and the structural base plate to prevent water from flowing upward from the structural base plate. This waterproofing measure includes two layers of polyethylene polypropylene waterproof membrane 6. After applying an interface agent 4 to the structural base plate, a polymer cement waterproof mortar 5 is applied to smooth the surface, and then the first layer of polyethylene polypropylene waterproof membrane 6 is attached. A second layer of polymer cement waterproof mortar 5 is then applied over this first layer, and then a second layer of polyethylene polypropylene waterproof membrane 6 is attached to achieve the desired waterproof effect.

[0021] In this embodiment, if Figure 2 As shown, the two layers of polyethylene polypropylene waterproof membrane 6 are bent to be flush with the roadbed surface, that is, bent from the connection position between the waterproof concrete structure 2 and the roadbed concrete structure 3 to the roadbed surface, thereby ensuring the waterproof effect at the joint position between the waterproof concrete structure 2 and the roadbed concrete structure 3.

[0022] like Figure 2 As shown, a cement-based penetrating crystalline waterproof coating 7 is applied to the bottom and perimeter of the switch pit 1, as well as to the exposed polyethylene polypropylene waterproof membrane 6 on the roadbed surface, to provide a waterproof effect. The cement-based penetrating crystalline waterproof coating 7 is applied in two layers, with the second layer applied after the first layer has dried. The first layer should be moistened with water before application, and the second layer should be applied perpendicular to the first.

[0023] like Figure 3 As shown, when the switch pit 1 on the side away from the line is close to the side wall or the armpit corner of the structure, the retaining wall of the waterproof concrete structure 2 on the side of the switch pit 1 away from the line cannot be implemented, then the waterproof concrete retaining wall on this side is cancelled, and the corresponding polyethylene polypropylene waterproof membrane 6 is bent and laid to the bottom of the pit and the joint with the structure at a certain distance to one side of the structure, and a cement-based penetrating crystallization waterproof coating 7 is coated on the edge positions on both sides of the polyethylene polypropylene waterproof membrane 6 to ensure the waterproof effect.

[0024] In this embodiment, the polyethylene polypropylene waterproofing membrane 6 is installed using the open-lay method. The overlapped edges should be smooth and close together, without warping, exposed glue, loose joints, or Ω-shaped seams. The switch pit 1 is located close to the track, so the polyethylene polypropylene waterproofing membrane 6 should be cut flush with the pit bottom.

[0025] Although the above embodiments have described the concepts and embodiments of the present invention in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described here one by one.

Claims

1. A waterproof treatment structure for a switch pit, characterized in that: It comprises a waterproof concrete structure, in which a switch pit is arranged, a polymer cement waterproof mortar layer and a waterproof roll material layer are arranged in sequence from bottom to top between the bottom of the waterproof concrete structure and the structural bottom plate, and a cement-based penetrating crystalline waterproof coating layer is coated on the pit wall of the switch pit.

2. A waterproof treatment structure for a switch pit according to claim 1, characterized in that: The waterproof roll material layer comprises at least two layers of polyethylene polypropylene waterproof roll materials, and each layer of the polyethylene polypropylene waterproof roll materials is bonded with a polymer cement adhesive.

3. A waterproof treatment structure for a switch pit according to claim 1, characterized in that: An interface agent layer is arranged between the polymer cement waterproof mortar layer and the structural base plate.

4. A waterproof treatment structure for a switch pit according to claim 1, characterized in that: A steel mesh is arranged in the waterproof concrete structure.

Images