Prefabricated joint of lining structure of subway station

Abstract

The present application provides a prefabricated subway station lining structure joint, comprising a prefabricated lining structure tenon end and a prefabricated lining structure mortise end. The prefabricated lining structure tenon end comprises a water stop and a tenon end connecting part, the water stop is made of water-swelling rubber water stop, the cross sections of the water stop and the tenon end connecting part are both trapezoidal, and the water stop and the tenon end connecting part form a stepped protrusion; the prefabricated lining structure mortise end is provided with a water stop installation groove and a mortise end connecting part, the cross sections of the water stop installation groove and the mortise end connecting part are both trapezoidal, the water stop installation groove and the mortise end connecting part form a stepped through groove, so that the prefabricated lining structure tenon end is embedded in the prefabricated lining structure mortise end to realize the mortise-and-tenon connection. The mortise-and-tenon structure design is helpful for positioning and hoisting, increases the connection strength of the prefabricated lining structure, is convenient for installation and construction, prolongs the water seepage path between the prefabricated lining structures, and improves the waterproof performance.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction, and specifically to a prefabricated assembly-type subway station lining structure joint. Background Technology

[0002] Currently, water seepage is a common problem in subway stations, especially prefabricated stations. Seepage mainly occurs at various joints or contact interfaces, as these are weak points in the structural waterproofing and have poor overall integrity. It can be said that water seepage is a major technical challenge affecting the development of prefabricated construction methods for subway stations. Traditional waterproofing methods for subway stations involve grouting or filling joints with various waterproofing materials such as waterstops to seal seepage channels. In recent years, scholars have proposed some new waterproofing measures to extend the seepage path. If a reliable connection method can be developed, it will benefit the connection of prefabricated lining structures. Summary of the Invention

[0003] The purpose of this invention is to address the water seepage problem in subway stations by proposing a prefabricated lining structure joint with a tenon-and-mortise connection design, combined with a one-way locking structure formed by the cooperation of a waterstop and a groove, thus providing a prefabricated assembled subway station lining structure joint.

[0004] This invention includes a tenon end and a mortise end of a prefabricated lining structure;

[0005] The tenon end of the precast lining structure includes a waterstop and a tenon end connection part. The waterstop is fixed to the end of the tenon end connection part, and the waterstop and the tenon end connection part form a stepped protrusion. The mortise end of the precast lining structure is provided with a waterstop installation groove and a mortise end connection part. The waterstop installation groove and the mortise end connection part form a stepped through groove, so that the tenon end of the precast lining structure is embedded into the mortise end of the precast lining structure to achieve a tenon-mortise connection.

[0006] In a preferred embodiment of the present invention, both the waterstop mounting groove and the tenon connection portion have trapezoidal cross sections. The upper base of the tenon connection portion's cross section coincides with the lower base of the waterstop mounting groove's cross section, and the lower base of the waterstop mounting groove's cross section is longer than the upper base of the tenon connection portion's cross section, making the cross sections of the waterstop mounting groove and the tenon connection portion a stepped cross section. Both the waterstop and the tenon connection portion have trapezoidal cross sections. The lower base of the waterstop's cross section is fixedly connected to the upper base of the tenon connection portion's cross section, and the lower base of the waterstop's cross section is longer than the upper base of the tenon connection portion's cross section, making the cross sections of the waterstop and the tenon connection portion a stepped cross section.

[0007] In a preferred embodiment of the present invention, the length of the bottom of the cross section of the mortise end connection is less than the width of the lining structure, and the length of the bottom of the cross section of the tenon end connection is less than the width of the lining structure.

[0008] In a preferred embodiment of the present invention, the mortise end of the precast lining structure is provided with waterproof material on the contact interface, and the tenon end of the precast lining structure is provided with waterproof material on the contact interface excluding the waterstop.

[0009] In a preferred embodiment of the present invention, the waterstop is a water-swellable rubber waterstop.

[0010] Beneficial effects:

[0011] (1) Inspired by the small parts commonly found in daily life such as trademark hang tags, various safety belts, and buckles, and combined with the mortise and tenon structure, the mortise and tenon structure design for unidirectional installation helps to strengthen the connection between precast lining structures, reduce structural misalignment, extend the service life of precast lining structures, and reduce operation and maintenance costs. The mortise and tenon structure design helps with positioning and hoisting, and also increases the connection strength of precast lining structures, making installation and construction easier.

[0012] (2) The tenon joint and the waterstop are both trapezoidal cross sections, and the mortise joint and the waterstop installation groove are trapezoidal cross sections, which makes the joint between the prefabricated lining structures longer, extends the seepage path, and improves the waterproof performance.

[0013] (3) Longer seams allow for more contact surface, and waterproof material can be applied to the contact surface to further improve waterproof performance.

[0014] (4) A water-swellable rubber waterstop is provided at the joint to tightly fill the joint space. When it swells with water, it can squeeze the waterstop installation groove and block the seepage path, making the connection more stable and further improving the waterproof performance. The water-swellable rubber waterstop has a certain elasticity, which facilitates installation and construction and protects the structure from bumps and knocks, which is beneficial to installation and construction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the connector in the separated state.

[0016] Figure 2 This is a schematic diagram showing the connection status of the connector;

[0017] Figure 3 This is a schematic diagram of the water seepage path at the joint connection.

[0018] Wherein: 1-Tenon end of precast lining structure; 2-Rubber waterstop; 3-Tenon end connection; 4-Rivet end of precast lining structure; 5-Waterstop installation groove; 6-Rivet end connection. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0020] For ease of explanation, the terms “upper,” “lower,” “left,” “right,” “inner,” and “outer” are used to describe these features with reference to their positions in the exemplary embodiments shown in the figures.

[0021] See appendix Figure 1-2 The present invention includes a prefabricated lining structure tenon end 1, a prefabricated lining structure mortise end 4, and a rubber waterstop 2.

[0022] See appendix Figure 1 The tenon end 1 of the precast lining structure is the protruding part of the connection, including the rubber waterstop 2 and the tenon end connection part 3. Except for the rubber waterstop 2, the rest of the part is made of reinforced concrete. The rubber waterstop 2 is a water-swellable rubber waterstop, which has a certain strength and strong toughness. The tenon end connection part 3 is the end structure of the tenon end 1, located at the connection section of the tenon end 1 of the precast lining structure. The cross section is trapezoidal. The width of the bottom of the tenon end connection part 3 is smaller than the width of the connection section. The top of the tenon end connection part 3 is provided with the rubber waterstop 2. The rubber waterstop 2 is a strip-shaped waterstop with a trapezoidal cross section. The bottom of the cross section of the rubber waterstop 2 is longer than the top of the cross section of the tenon end connection part 3. The rubber waterstop 2 and the tenon end connection part 3 form a stepped protrusion. The bottom of the rubber waterstop 2 is provided with a protrusion, which is pre-embedded into the top of the tenon end connection part 3 during the precasting of the lining structure.

[0023] The precast lining structure mortise end 4 is a recessed part at the connection, entirely made of reinforced concrete. A waterstop installation groove 5 and a mortise end connection part 6 are set inside the connection section. Both the waterstop installation groove 5 and the mortise end connection part 6 are trapezoidal through grooves. The lower base of the waterstop installation groove 5 is longer than the upper base of the mortise end connection part 6, forming a stepped through groove. The waterstop installation groove 5 matches the shape of the rubber waterstop 2, and the mortise end connection part 6 matches the shape of the tenon end connection part 3, facilitating the interlocking of the precast lining structure tenon end 1 and the precast lining structure mortise end 4, ensuring the connection between the lining structures and reducing structural misalignment. The width of the lower base of the mortise end connection part 6 is smaller than the width of the connection section.

[0024] This invention is prefabricated in the factory and then transported to the construction site for hoisting. See attached document. Figure 2 After the tenon end 1 of the precast lining structure is embedded into the mortise end 4 of the precast lining structure, the connection can be guaranteed to be unidirectional. That is, after the tenon and mortise are installed, the structure is locked and it is difficult to separate it by conventional means without damaging the structure. Other waterproofing measures can be added to each contact surface at the connection between the tenon end 1 and the mortise end 4 of the precast lining structure, or waterproofing materials (such as penetrating crystallizing waterproofing agents) can be applied along the joint.

[0025] This invention can be applied to various connection points of tunnels during subway station construction; see appendix. Figure 3When the water-facing side of the lining structure encounters groundwater intrusion, the groundwater seeps in along the direction of the arrow. After the groundwater intrudes into the joint gap, it comes into contact with the rubber waterstop 2. The rubber waterstop 2 expands naturally when it comes into contact with water, squeezing the waterstop installation groove 5 and strengthening the filling of the space at the connection. On the one hand, it can block the seepage path, and on the other hand, it can increase the stability of the connection of the precast lining structure. At the same time, the tortuous joint form at the connection can extend the seepage path and further enhance the waterproof performance of the structure.

[0026] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A prefabricated assembled subway station lining structure joint, characterized in that, This includes the tenon end of the precast lining structure and the mortise end of the precast lining structure; The precast lining structure tenon end includes a waterstop and a tenon end connection part. The waterstop is fixed to the end of the tenon end connection part. The cross-section of both the waterstop and the tenon end connection part is trapezoidal, and the waterstop and the tenon end connection part form a stepped protrusion. The precast lining structure has a waterstop installation groove and a mortise connection part at the mortise end. The cross-sections of the waterstop installation groove and the mortise connection part are both trapezoidal. The waterstop installation groove and the mortise connection part form a stepped through groove, so that the tenon end of the precast lining structure can be embedded into the mortise end of the precast lining structure to achieve a tenon-mortise connection.

2. The prefabricated assembled subway station lining structure joint as described in claim 1, characterized in that, The upper bottom of the cross-section of the mortise connection coincides with the lower bottom of the cross-section of the waterstop mounting groove, and the lower bottom of the cross-section of the waterstop mounting groove is longer than the upper bottom of the cross-section of the mortise connection, so that the cross-sections of the waterstop mounting groove and the mortise connection form a stepped cross-section; the lower bottom of the cross-section of the waterstop is fixedly connected to the upper bottom of the cross-section of the tenon connection, and the lower bottom of the cross-section of the waterstop is longer than the upper bottom of the cross-section of the tenon connection, so that the cross-sections of the waterstop and the tenon connection form a stepped cross-section.

3. A prefabricated assembled subway station lining structure joint as described in claim 1 or 2, characterized in that, The length of the bottom of the cross section of the mortise end connection is less than the width of the lining structure, and the length of the bottom of the cross section of the tenon end connection is less than the width of the lining structure.

4. A prefabricated assembled subway station lining structure joint as described in claim 1 or 2, characterized in that, The precast lining structure has waterproof material on the contact interface at the mortise end, and the precast lining structure has waterproof material on the contact interface excluding the waterstop at the tenon end.

5. A prefabricated assembled subway station lining structure joint as described in claim 1 or 2, characterized in that, The waterstop is made of water-swellable rubber.

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