Assembly type lining structure based on formed segment rings

Abstract

The utility model discloses an assembly type lining structure based on a formed segment ring, and relates to the technical field of tunnel construction, the assembly type lining structure comprises the segment ring and a prefabricated lining group arranged on the inner side of the segment ring, and the segment ring is connected with the prefabricated lining group through a connecting assembly; the connecting assembly comprises threaded sleeves, connecting screws, connecting steel plates and supporting steel plates, the multiple threaded sleeves are pre-buried in the segment ring, the connecting screws are adjustably connected to the threaded sleeves, the connecting steel plates are fixed to one ends of the connecting screws, connecting grooves are formed in the prefabricated lining set, and the supporting steel plates are arranged in the connecting grooves. The connecting steel plate is fixedly connected to the supporting steel plate. According to the structure, the segment ring and the prefabricated lining set can be reliably connected, the mounting gap between the segment ring and the prefabricated lining set can be adjusted, the error adaptability is high, construction is easy and convenient, and the shield tunnel structure high in stability is formed.

Description

Technical Field

[0001] This utility model relates to the field of tunnel technology, specifically to an assembled inner lining structure based on a precast segment ring. Background Technology

[0002] Tunnel duct construction is a crucial step in tunnel construction, especially in shield tunneling. To improve the safety, durability, fire resistance, impact resistance, and toughness of the tunnel duct structure, an inner lining structure is required within the duct. Existing connection methods between the tunnel duct and the precast inner lining mainly include bolted connections, rebar connections, tongue and groove connections, and grouting connections. While these methods can securely connect and fix the segment ring to the precast inner lining, manufacturing and installation errors during actual construction make the connection process cumbersome and prevent a tight fit between the precast inner lining and the inner wall of the segment ring, resulting in poor force transmission and impacting the overall service life of the tunnel structure. Utility Model Content

[0003] The purpose of this invention is to provide an assembled inner lining structure based on a precast segment ring. This structure can reliably connect the segment ring and the precast inner lining assembly, adjust the installation gap between the segment ring and the precast inner lining assembly, has strong error adaptability, is simple and convenient to construct, forms a highly stable shield tunnel structure, and has a long service life.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An assembled inner liner structure based on a precast segment ring includes a segment ring and a prefabricated inner liner assembly disposed inside the segment ring. The segment ring and the prefabricated inner liner assembly are connected by a connecting assembly. The connecting assembly includes threaded sleeves, connecting screws, connecting steel plates, and supporting steel plates. Multiple threaded sleeves are pre-embedded in the segment ring. The connecting screws are adjustablely connected to the threaded sleeves. The connecting steel plates are fixed to one end of the connecting screws. A connecting groove is provided on the prefabricated inner liner assembly. The supporting steel plates are disposed in the connecting grooves, and the connecting steel plates are fixedly connected to the supporting steel plates.

[0006] Preferably, a grouting layer is provided between the segment ring and the prefabricated liner assembly.

[0007] Preferably, anti-collision sidewalls are provided at the bottom of both ends of the prefabricated lining assembly, and grooves are provided at the bottom of the anti-collision sidewalls.

[0008] Preferably, the connecting steel plate is fixedly connected to the supporting steel plate by welding.

[0009] Preferably, a connecting hole is provided on the supporting steel plate, and one end of the connecting screw passes through the connecting steel plate and the connecting hole, and the connecting steel plate is fixedly connected to the supporting steel plate by means of a nut.

[0010] Preferably, the prefabricated lining assembly is composed of multiple lining pieces spliced ​​together.

[0011] Preferably, multiple prefabricated liner assemblies are arranged along the ring axis of the segment; multiple connecting posts are provided on one side of each liner piece, and a connecting sleeve adapted to the connecting posts is provided on the other side of each liner piece; when two adjacent prefabricated liner assemblies are spliced ​​together, the connecting posts are inserted into the connecting sleeves.

[0012] Preferably, the connecting sleeve is made of polyamide material and has a serrated portion inside.

[0013] Preferably, sealing grooves are provided on both sides of the inner lining sheet, and slurry-blocking strips are provided in the sealing grooves.

[0014] Preferably, a sealing element is provided between the segment ring and the prefabricated liner assembly at the end position.

[0015] In this invention, the segment ring and the precast lining assembly are fixedly connected by a connecting component, resulting in strong structural bending stiffness and strength. The connecting screws in the connecting component allow adjustment of the gap between the segment ring and the precast lining assembly, ensuring the accuracy of the precast lining assembly's installation position and forming a grouting layer of a specified thickness. After grouting, the segment ring and the precast lining assembly are tightly connected, jointly bearing the pressure of the surrounding soil and other loads, improving force transmission efficiency. It also serves as a waterproof seal, preventing groundwater and other contaminants from seeping into the tunnel.

[0016] The installed grout-blocking strips and sealing components ensure a tight seal in the grouting layer, preventing grout leakage during injection. The connecting sleeve is made of polyamide, possessing high strength and rigidity. The connecting column is made of steel rod, and when used in conjunction with the steel rod, it can withstand external forces and pressures to a certain extent, resisting deformation or damage. Simultaneously, the polyamide material also possesses a certain degree of toughness, acting as a buffer under impact loads, reducing stress concentration on the steel rod, improving the overall structure's fatigue resistance, and extending its service life. The serrated section within the connecting sleeve enhances the connection force with the connecting column, increasing the connection strength. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is an enlarged cross-sectional view of a portion of the structure after grouting of this utility model;

[0019] Figure 3 This is a partial structural diagram of the connection assembly in connection state according to another embodiment of the present invention;

[0020] Figure 4This is a partial structural diagram of the vertical cross-section of two adjacent precast lining groups after grouting according to this utility model.

[0021] In the diagram: 1. Segment ring; 2. Precast lining assembly; 3. Grouting layer; 4. Anti-collision sidewall; 5. Trench; 6. Connecting column; 7. Connecting sleeve; 8. Grout-blocking strip; 9. Connecting assembly; 10. Sealing component; 20. Single lining piece; 21. Connecting groove; 90. Threaded sleeve; 91. Connecting bolt; 92. Connecting steel plate; 93. Supporting steel plate; 94. L-shaped reinforcing member; 95. Connecting hole. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] like Figures 1 to 4 The diagram illustrates an assembled inner liner structure based on a precast segment ring, comprising a segment ring 1 and a precast inner liner assembly 2 disposed inside the segment ring 1. A grouting layer 3 is provided between the segment ring 1 and the precast inner liner assembly 2. In this embodiment, the thickness of the grouting layer 3 is 50 mm, but it can be set to 30 mm to 70 mm depending on actual construction requirements. Anti-collision sidewalls 4 are provided at the bottom of both ends of the precast inner liner assembly 2, and grooves 5 are provided at the bottom of the anti-collision sidewalls 4 for drainage, cable laying, or ventilation duct arrangement. The thickness of the anti-collision sidewalls 4 is not less than 300 mm, the thickness of the precast inner liner assembly 2 is not less than 165 mm, and the width of the precast inner liner assembly 2 is 2000 mm.

[0024] The prefabricated liner assembly 2 is composed of multiple liner pieces 20 spliced ​​together. Each liner piece 20 has a connecting protrusion or a connecting recess at its end, and adjacent liner pieces 20 are connected via these protrusions or recesses. A socket-type circumferential connector is installed at the connection point of adjacent liner pieces 20 to securely connect adjacent liner pieces 20 within the same prefabricated liner assembly 2, ensuring connection strength.

[0025] Multiple prefabricated liner assemblies 2 are arranged along the axial direction of the segment ring 1, and the length of the assembled prefabricated liner assemblies 2 is consistent with the length of the segment ring 1. Multiple connecting columns 6 are set on the side of the liner piece 20 away from the jack, and a connecting sleeve 7 adapted to the connecting columns 6 is set on the other side of the liner piece 20; when two adjacent prefabricated liner assemblies 2 are spliced, the connecting column 6 is inserted into the corresponding connecting sleeve 7.

[0026] The connecting sleeve 7 is made of polyamide material. A serrated part is integrally provided inside the connecting sleeve 7. The serrated part can improve the connection strength between the connecting post 6 and the connecting sleeve 7. The connecting post 6 is a round steel bar. A guide cone surface is provided at the front end of the connecting post 6 to facilitate insertion with the connecting sleeve 7.

[0027] Sealing grooves are provided on both sides of the inner lining unit 20, and grout-blocking strips 8 are fixedly installed in the sealing grooves. When two adjacent grout-blocking strips 8 are squeezed, they seal the gap between the two inner lining units 20 to prevent grout leakage. A sealing element 10 is provided between the end of the segment ring 1 and the prefabricated inner lining assembly 2 at the end position. After the prefabricated inner lining assembly 2 is assembled with the segment ring 1, the grout-blocking strips 8, the sealing element 10, and the anti-collision sidewall 4 seal the grouting layer 3, facilitating subsequent grouting operations. Grouting holes are prefabricated on one or more inner lining units 20, and grouting operations are carried out through multiple grouting holes.

[0028] The segment ring 1 is connected to the prefabricated liner assembly 2 via a connecting component 9. The connecting component 9 includes a threaded sleeve 90, a connecting screw 91, a connecting steel plate 92, and a supporting steel plate 93. Multiple threaded sleeves 90 are pre-embedded inside the segment ring 1. An L-shaped reinforcing member 94 is provided at the end of each threaded sleeve 90, which improves the connection strength of the threaded sleeve 90. One end of the threaded sleeve 90 protrudes from the inner surface of the segment ring 1.

[0029] The connecting screw 91 is connected to the threaded sleeve 90 via an adjustable thread. Under normal conditions, the connecting screw 91 is screwed into the deepest part of the threaded sleeve 90. When the segment ring 1 is connected to the prefabricated inner liner group 2, the connecting screw 91 is screwed out to the appropriate position.

[0030] A connecting groove 21 is provided on the prefabricated liner assembly 2, and a supporting steel plate 93 is fixedly installed in the connecting groove 21. The connecting groove 21 has a trapezoidal cross-section and does not penetrate the inner and outer surfaces of the liner piece 20, making the inner surface of the liner piece 20 smooth and aesthetically pleasing. In one embodiment, the connecting steel plate 92 is fixed to one end of the connecting screw 91 by welding. After being adjusted to a suitable position, the connecting steel plate 92 is fixedly connected to the supporting steel plate 93 by welding. This achieves the connection between the segment ring 1 and the prefabricated liner assembly 2.

[0031] In another embodiment, a connecting hole 95 is provided on the supporting steel plate 93. One end of the connecting screw 91 passes through the connecting steel plate 92 and the connecting hole 95, and the connecting steel plate 92 is fixedly connected to the supporting steel plate 93 by a nut. In this embodiment, the cross-section of the connecting groove 21 is trapezoidal, and the connecting groove 21 penetrates the inner and outer surfaces of the inner lining piece 20. The connecting hole 95 is an elongated hole, and the supporting steel plate 93 can be adjusted in position along the direction perpendicular to the elongated hole to accommodate the installation and manufacturing errors of the segment ring 1 and the prefabricated inner lining assembly 2, ensuring that the two can be quickly and stably connected. After connection, the connecting groove 21 needs to be sealed.

[0032] The above embodiments are merely illustrative of the concept and implementation of this utility model, and are not intended to limit it. Under the concept of this utility model, the technical solutions without substantial changes are still within the scope of protection.

Claims

1. A segmental lining structure based on a segmental ring, comprising a segmental ring and a prefabricated lining set arranged inside the segmental ring, characterized in that: The pipe segment ring is connected with the prefabricated lining group through a connecting assembly; the connecting assembly comprises threaded sleeves, connecting screws, connecting steel plates and supporting steel plates, a plurality of the threaded sleeves are embedded in the pipe segment ring, the connecting screws are adjustably connected to the threaded sleeves, the connecting steel plates are fixed at one end of the connecting screws, connecting grooves are arranged on the prefabricated lining group, the supporting steel plates are arranged in the connecting grooves, and the connecting steel plates are fixedly connected to the supporting steel plates.

2. A precast, segmental ring based, fabricated lining structure according to claim 1, characterized in that: A grouting layer is arranged between the pipe segment ring and the prefabricated lining group.

3. A precast lining structure based on a ring of formed segments as claimed in claim 1 or 2, characterised in that: Anti-collision side walls are arranged at the bottom of the two ends of the prefabricated lining group, and grooves are arranged at the bottom of the anti-collision side walls.

4. The segmental ring based precast lining structure based on a forming tube segment according to claim 1, characterized in that: The connecting steel plates are fixedly connected to the supporting steel plates through welding.

5. The segmental ring based precast lining structure based on a forming tube segment according to claim 1, characterized in that: Connecting holes are arranged on the supporting steel plates, one end of the connecting screws passes through the connecting steel plates and the connecting holes, and nuts are arranged to fixedly connect the connecting steel plates to the supporting steel plates.

6. The segmental ring based precast lining structure based on a forming tube segment according to claim 1, characterized in that: The prefabricated lining group is formed by splicing a plurality of lining single pieces.

7. A precast segmental ring based lining structure according to claim 6, characterized in that: A plurality of the prefabricated lining groups are arranged along the axial direction of the pipe segment ring; a plurality of connecting columns are arranged on one side of the lining single piece, and connecting sleeves matched with the connecting columns are arranged on the other side of the lining single piece; when two adjacent prefabricated lining groups are spliced, the connecting columns are inserted into the connecting sleeves.

8. A precast, segmental ring based lining structure according to claim 7, characterized in that: The connecting sleeves are made of polyamide material, and serrations are arranged in the connecting sleeves.

9. A precast lining structure based on a ring of formed segments as claimed in claim 7 or 8, characterised in that: Sealing grooves are arranged on both sides of the lining single piece, and grouting blocking strips are arranged in the sealing grooves.

10. The segmental ring based precast lining structure based on a forming tube segment according to claim 1, characterized in that: A blocking piece is arranged between the pipe segment ring and the prefabricated lining group at the end position.

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