Stable shield tunnel segment longitudinal seam splicing connecting piece and using method thereof

Abstract

The invention relates to the technical field of splicing connecting pieces, in particular to a stable shield tunnel segment longitudinal joint splicing connecting piece and a using method thereof.The stable shield tunnel segment longitudinal joint splicing connecting piece comprises tunnel splicing segments and inter-segment longitudinal joints, the inter-segment longitudinal joints are arranged between the multiple tunnel splicing segments, and each tunnel splicing segment comprises a segment unit; a concave connecting piece, a convex connecting piece and an inserting rod assembly are fixedly connected to the inner side of each segment unit, a rotating pipe assembly is installed on the inner side of each segment unit, each segment unit comprises a segment body, a sliding installation groove is formed in one end of each segment body, and a pouring space groove is formed in one end of each segment body. According to the duct piece, the connecting piece can be completely embedded into the duct piece after the duct piece is spliced, the connecting piece is prevented from being exposed in the external environment, the influence of the external environment on the connecting piece is reduced, and the risk that the connecting piece is rusted and embrittled is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of splicing connectors, and in particular to a stable shield tunnel segment longitudinal seam splicing connector and a use method thereof. Background Art

[0002] Shield tunnel segments are the main assembly components in shield construction. They constitute the innermost barrier of the tunnel and bear the role of resisting soil pressure, groundwater pressure and some special loads. The production of shield segments usually uses high-strength impermeable concrete to ensure reliable bearing and waterproof performance. The production process mainly uses finished segment molds, which can be formed after sealing and pouring concrete; When prefabricating the segments, it is usually necessary to locate the connection bolt holes on the template in advance so that the special connection bolts can be used to assemble and fasten the annular joints and longitudinal joints during tunnel shield construction, thus forming a complete concrete pipe. In the process of splicing tunnel segments, if bolts are used as connectors, it is necessary to accurately align the bolts with the threaded holes, and use tools such as torque wrenches to tighten the connecting bolts again. This requires leaving a certain space between the segments. Since the connecting bolts are made of metal, the reserved space will expose the bolts to the external environment, causing rust and embrittlement of the bolts, thereby affecting the service life of the tunnel and may cause tunnel disease problems in the later stage. Therefore, in view of the above problems, a stable shield tunnel segment longitudinal seam splicing connector and a method for using the same are proposed. Summary of the invention

[0003] The purpose of the present invention is to provide a stable shield tunnel segment longitudinal seam splicing connector and a method of using the same, so as to solve the problem that since the connecting bolts are made of metal, the space left will expose the bolts to the external environment, causing the bolts to rust and become brittle, thereby affecting the service life of the tunnel and possibly causing tunnel disease problems in the later stage.

[0004] To achieve the above object, the present invention provides the following technical solutions: A stable shield tunnel segment longitudinal seam splicing connector and a method for using the same, comprising a tunnel splicing segment and a longitudinal seam between segments, wherein a plurality of the tunnel splicing segments are provided with longitudinal seams between segments, wherein the tunnel splicing segment comprises a segment unit, wherein a concave connector is fixedly connected to the inner side of the segment unit, wherein a convex connector is fixedly connected to the inner side of the segment unit, wherein a plunger assembly is fixedly connected to the inner side of the segment unit, and a rotating pipe assembly is installed inside the segment unit, wherein the segment unit comprises a segment body, wherein a sliding mounting groove is provided at one end of the segment body, a casting groove is provided at one end of the segment body, a blind groove is provided at one side of the segment body, a limited position mounting groove is provided at one side of the segment body, an elastic sealing pad strip is fixedly connected to one end of the segment body, and a sealing groove is provided at one end of the segment body, wherein the concave connector comprises a concave joint, wherein a concave inner cavity entrance is provided at one side of the concave joint, a non-conducting inner cavity opening groove is provided at the inner side of the concave joint, and a pair of The inner inclined surface is a concave inner cavity, a concave joint anchor is welded and fixed on one side of the concave joint, the convex connector includes a convex joint, a boss is arranged on one side of the convex joint, one end of the boss is a convex joint insertion end, a symmetrical inclined surface is arranged on one side of the boss, a convex joint anchor is welded and fixed on one side of the convex joint, the plug rod assembly includes a plug column, one end of the plug column is fixedly connected with a lock head, the outer side of the plug column is fixedly connected with a column protrusion, the rotating tube assembly includes a plug-in rotating tube, the inner side of the plug-in rotating tube is provided with an inter-tube sliding groove, the inner side of the plug-in rotating tube is provided with an inner tube curved groove, the outer side of one end of the plug-in rotating tube located inside the pipe segment unit is fixedly connected with a limiting block, the inner side of the plug-in rotating tube is provided with an inner tube mounting groove, the inner side of the inner tube mounting groove is provided with a ball, the inner side of the plug-in rotating tube is pasted and fixed with a limiting assembly, the limiting assembly includes a grinding block, the inner side of the grinding block is provided with an arc groove, one side of the grinding block is fixedly connected with a compression spring, and the outer side of the grinding block is slidably connected with a washer with a hole.

[0005] As further optimized content of the present invention, the concave connector and the convex connector are made of high-strength and corrosion-resistant non-metallic polymer material through precise one-time pressing by a steel mold, the angle between the concave connector and the tube segment unit is 90°, the angle between the convex connector and the tube segment unit is 90°, the angle between the insertion rod assembly and the tube segment unit is 90°, and the angle between the rotating tube assembly and the tube segment unit is 90°.

[0006] As a further optimization of the present invention, there are two insertion rod assemblies, which are symmetrically distributed up and down; there are two rotating tube assemblies, which are symmetrically distributed up and down; the positions of the insertion rod assemblies correspond one to one with the positions of the rotating tube assemblies.

[0007] As further optimized content of the present invention, wherein: a concave connecting piece is installed on the inner side of the sliding installation groove, a convex connecting piece is fixedly connected on the inner side of the casting groove, the blind groove is in the shape of a cylinder and a hexagonal prism, a rotating tube assembly is fitted in the gap on the inner side of the blind groove, a rotating tube assembly is installed on the inner side of the limiting installation groove, and the elastic sealing pad strip and the sealing groove are engaged with each other.

[0008] As a further optimization content of the present invention, the angle between the concave joint and the convex joint is 90°, the side of the concave joint with the non-internal cavity opening groove is on the same plane as one end of the tube unit, the inner side of the symmetrical inner bevel concave inner cavity is in contact with the outer side of the boss, and two concave joint anchor bolts are provided, and the two concave joint anchor bolts are parallel to each other.

[0009] As a further optimization content of the present invention, the outer side of the convex joint is fitted with the inner side of the opening groove of the blind inner cavity, the insertion end of the convex joint and the entrance of the concave inner cavity are clearance-fitted, the angle formed between the convex joint anchor bolt and the convex joint is 90°, and two convex joint anchor bolts are provided, and the two convex joint anchor bolts are symmetrically distributed.

[0010] As a further optimization of the present invention, the plug and the lock are on the same axis, the lock is composed of a cylinder and a sphere, the angle between the protrusion on the column and the plug is 90°, the outer side of the plug fits with the inner side of the sliding groove between the tubes, and the outer side of the protrusion on the column fits with the inner side of the curved groove in the tube.

[0011] As a further optimization of the present invention, there are two limit blocks, which are symmetrically distributed, the shape of the mounting groove in the tube is composed of a cylindrical shape and a truncated cone shape, and there are a plurality of ball bearings, which are distributed in a ring array on the inner side of the mounting groove in the tube.

[0012] As a further optimization of the present invention, the grinding block and the lock head have the same axis, the grinding block, the compression spring and the washer with holes have the same axis, the inner side of the arc groove fits with the outer side of the lock head, and one end of the compression spring is fixedly connected with a plug-in rotating tube.

[0013] A method for using a stable shield tunnel segment longitudinal seam splicing connector. S1: Splice the concave connectors and convex connectors located on different segment units: When pouring concrete, the concave connectors and convex connectors are accurately pre-embedded in the segment units respectively, and then the convex connector pre-embedded in one segment unit is inserted into the sliding installation groove opened in the other segment unit, and then the convex connector is moved so that the insertion end of the convex joint passes through the concave inner cavity entrance, and the boss is slid and installed to the inner side of the symmetrical inner inclined concave inner cavity, and the convex joint will be stuck in the blind inner cavity opening groove opened on the inner side of the concave joint. At this time, the concave connector and the convex connector are at specific positions on the end faces of the longitudinal seams between the segments.

[0014] S2: The locking between the concave connector and the convex connector forms a seal between different segment units: When the concave connector and the convex connector are at a specific position on the end surface of the longitudinal seam between the segments, a fixed connection is formed between the concave joint and the convex joint, and a fixed connection is formed between the two segment units through the concave joint anchor bolt and the convex joint anchor bolt. At this time, the elastic sealing gasket strip on the segment body will be completely fitted with the inner side of the sealing groove opened in the other segment body, thereby strengthening the sealing between the two segment bodies and preventing the concave connector and the convex connector in the longitudinal seam between the segments from being affected by the external environment and rusting or embrittlement; S3: Connect the plug rod assembly and the rotating tube assembly respectively located on different tube segment units: when the two tube segment units are close to each other, insert the plug column on one tube segment unit into the inter-tube sliding groove on the other tube segment unit. When the plug column moves, it will drive the fixedly connected column protrusion to move. The setting of the inner curved groove of the tube makes the column protrusion slide inside the inner curved groove of the tube, which will drive the plug-in rotating tube to rotate. The rotation of the plug-in rotating tube will drive the fixedly connected limit block to rotate, so that the rotating tube assembly is rotated and stuck in the limit installation groove. Since there is a clearance fit between the blind groove and the rotating tube assembly, one end of the plug-in rotating tube can just enter the blind groove during the rotation process, so that the two tube segment units can fit together. S4: After the plug-in rod assembly and the rotating tube assembly are plugged in, they play a locking role on the tube unit: when the locking head enters the inner side of the installation groove in the tube, it will fit into the inner side of the arc groove and push the grinding block to slide on the inner side of the perforated gasket. At the same time, the locking head will also squeeze the balls, so that multiple balls and the locking head are locked. At this time, one end of the plug column and one end of the plug-in rotating tube are on the same plane and are located in the blind groove at the same time. The tube unit limits the sliding of the plug column in the plug-in rotating tube, and the curved groove in the tube limits the rotation of the plug column in the plug-in rotating tube through the protrusion on the column. The plug-in rod assembly and the rotating tube assembly are locked, and the two tube units are also locked.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by providing the concave connector and the convex connector, the connector can be completely embedded in the pipe segment after the pipe segment is spliced, so as to avoid the connector being exposed to the external environment, reduce the impact of the external environment on the connector, and reduce the risk of rust and embrittlement of the connector, thereby significantly improving the corrosion resistance of the connector. This design not only reduces the occurrence of tunnel disease problems, prolongs the service life of the tunnel, but also reduces maintenance costs; 2. In the present invention, the concave connector and the convex connector are provided to further achieve the simplicity and speed of installation of the device components. The staff can use the characteristics of the two connectors to achieve fast and accurate docking between the components, simplify the construction steps, significantly shorten the overall construction time, improve the construction efficiency, and reduce the dependence on manual operation during the construction process, thereby reducing the construction errors and risks caused by human factors; 3. In the present invention, the friction and locking force between the segments are increased by setting the plunger assembly and the rotating tube assembly, which significantly improves the accuracy of segment assembly and effectively prevents the displacement or loosening of the segments due to external forces or geological changes, thereby improving the overall strength of the entire tunnel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the tunnel splicing pipe segment structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the tunnel splicing pipe segment of the present invention; Figure 4 It is a schematic diagram of the structure of the right side of the tube segment unit of the present invention; Figure 5 It is a schematic diagram of the left side structure of the pipe segment unit of the present invention; Figure 6 It is a schematic diagram of the structure of the concave connector of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the concave connector of the present invention; Figure 8 It is a schematic diagram of the top view of the structure of the concave connecting member of the present invention; Fig. 9 It is a schematic diagram of the structure of the convex connector of the present invention; Fig.10 It is a schematic diagram of the structure of the plunger assembly of the present invention; Fig.11 It is a schematic diagram of the structure of the rotating tube assembly of the present invention; Fig.12 It is a schematic diagram of the cross-sectional structure of the rotating tube assembly of the present invention; Fig.13 It is a schematic diagram of the explosion structure of the limiting component of the present invention.

[0017] In the figure: 1. Tunnel splicing pipe segments; 101, segment unit; 1011, segment body; 1012, sliding installation groove; 1013, casting groove; 1014, blind groove; 1015, limit installation groove; 1016, elastic sealing pad strip; 1017, sealing groove; 102, concave connector; 1021, concave joint; 1022, concave inner cavity entrance; 1023, blind inner cavity opening groove; 1024, symmetrical inner bevel concave inner cavity; 1025, concave joint anchor bolt; 103, convex connector; 1031, convex connector; 1032, boss; 1033, convex connector insertion end; 1034, symmetrical bevel; 1035, convex connector anchor bolt; 104, plug assembly; 1041, plug column; 1042, lock head; 1043, protrusion on the column; 105, rotating tube assembly; 1051, plug-in rotating tube; 1052, sliding groove between tubes; 1053, curved groove in tube; 1054, stopper; 1055, mounting groove in tube; 1056, ball bearing; 1057, stopper assembly; 10571, grinding block; 10572, arc groove; 10573, compression spring; 10574, washer with hole; 2. Longitudinal seams between segments. DETAILED DESCRIPTION

[0018] See also Figure 1-13 , the present invention provides a technical solution: A stable shield tunnel segment longitudinal seam splicing connector and a method for using the same, comprising a tunnel splicing segment 1 and a longitudinal seam 2 between segments, wherein the longitudinal seams 2 between segments are arranged between a plurality of tunnel splicing segments 1, the tunnel splicing segment 1 comprising a segment unit 101, wherein a concave connector 102 is fixedly connected to the inner side of the segment unit 101, wherein a convex connector 103 is fixedly connected to the inner side of the segment unit 101, wherein a plunger assembly 104 is fixedly connected to the inner side of the segment unit 101, wherein a rotating pipe assembly 105 is installed inside the segment unit 101, wherein the segment unit 101 comprises a segment body 1011, wherein a sliding installation groove 1012 is provided at one end of the segment body 1011, wherein the segment body A casting groove 1013 is provided at one end of the segment body 1011, a blind groove 1014 is provided at one side of the segment body 1011, a limited position installation groove 1015 is provided at one side of the segment body 1011, an elastic sealing pad 1016 is fixedly connected to one end of the segment body 1011, a sealing groove 1017 is provided at one end of the segment body 1011, and the concave connector 102 includes a concave joint 1021, a concave inner cavity inlet 1022 is provided at one side of the concave joint 1021, a non-concave inner cavity opening groove 1023 is provided on the inner side of the concave joint 1021, a symmetrical inner inclined concave inner cavity 1024 is provided on the inner side of the concave joint 1021, and one side of the concave joint 1021 is welded A female joint anchor bolt 1025 is fixed, the male connector 103 includes a male joint 1031, a boss 1032 is provided on one side of the male joint 1031, one end of the boss 1032 is a male joint insertion end 1033, a symmetrical inclined surface 1034 is provided on one side of the boss 1032, a male joint anchor bolt 1035 is welded and fixed on one side of the male joint 1031, the plug rod assembly 104 includes a plug column 1041, one end of the plug column 1041 is fixedly connected to a lock head 1042, and the outer side of the plug column 1041 is fixedly connected to a column protrusion 1043, and the rotating tube assembly 105 includes a plug-in rotating tube 1051, and the inner side of the plug-in rotating tube 1051 is provided with a tube-to-tube sliding groove 105 2. An inner curved groove 1053 is provided on the inner side of the plug-in rotating tube 1051, and a limiting block 1054 is fixedly connected to the outer side of one end of the plug-in rotating tube 1051 located inside the tube unit 101. An inner installation groove 1055 is provided on the inner side of the plug-in rotating tube 1051, and a ball 1056 is arranged on the inner side of the inner installation groove 1055. A limiting component 1057 is fixedly pasted inside the plug-in rotating tube 1051, and the limiting component 1057 includes a grinding block 10571, and an arc groove 10572 is provided on the inner side of the grinding block 10571. A compression spring 10573 is fixedly connected to one side of the grinding block 10571, and a washer 10574 with a hole is slidably connected to the outer side of the grinding block 10571.

[0019] As a technical solution for further implementation of this solution, a concave connector 102 is installed inside the sliding installation groove 1012, a convex connector 103 is fixedly connected inside the casting groove 1013, and a blind groove 1014; the shape is composed of a cylinder and a hexagonal prism, a rotating tube assembly 105 is matched with the gap inside the blind groove 1014, and a rotating tube assembly 105 is installed inside the limiting installation groove 1015. The elastic sealing pad strip 1016 and the sealing groove 1017 are mutually engaged. Such a design can prevent the components from being affected by the external environment and rusting or embrittlement, thereby extending the service life of the components; As a technical solution further implemented in this scheme, the angle between the concave joint 1021 and the convex joint 1031 is 90°, the side of the concave joint 1021 with the non-inner cavity opening groove 1023 is in the same plane as one end of the tube segment unit 101, the inner side of the symmetrical inner inclined concave inner cavity 1024 is in contact with the outer side of the boss 1032, and two concave joint anchor bolts 1025 are provided, and the two concave joint anchor bolts 1025 are parallel to each other, which can better ensure the convenience and stability of the connection and greatly improve the overall quality of the device; As a technical solution for further implementation of this solution, the concave connector 102 and the convex connector 103 are made of high-strength and corrosion-resistant non-metallic polymer materials through precision one-time pressing by a steel mold. The angle between the concave connector 102 and the tube unit 101 is 90°, the angle between the convex connector 103 and the tube unit 101 is 90°, the angle between the plunger assembly 104 and the tube unit 101 is 90°, and the angle between the rotating tube assembly 105 and the tube unit 101 is 90°. Such a design can make the mutual connection between the components more stable and improve the overall stability of the device; As a technical solution for further implementation of this solution, two plunger assemblies 104 are provided, and the two plunger assemblies 104 are symmetrically distributed up and down, and two rotating tube assemblies 105 are provided, and the two rotating tube assemblies 105 are symmetrically distributed up and down. The positions of the plunger assemblies 104 correspond to the positions of the rotating tube assemblies 105 one by one. Such a design is conducive to the mutual cooperation between the components, so that the positioning of the components is more accurate when they are installed; As a technical solution for further implementation of this solution, two limit blocks 1054 are provided, and the two limit blocks 1054 are symmetrically distributed. The shape of the inner tube installation groove 1055 is composed of a cylindrical shape and a truncated cone shape. A plurality of balls 1056 are provided, and the balls 1056 are distributed in an annular array inside the inner tube installation groove 1055. Such a design is conducive to improving the locking effect of the components and improving the stability of the device; As a technical solution for further implementation of this solution, the grinding block 10571 and the lock head 1042 share the same axis, the grinding block 10571, the compression spring 10573 and the washer with holes 10574 share the same axis, the inner side of the arc groove 10572 fits the outer side of the lock head 1042, and one end of the compression spring 10573 is fixedly connected with the plug-in rotating tube 1051. Such a design is conducive to the transmission of force between components and enables better coordination between components. As a technical solution for further implementation of this solution, the outer side of the convex joint 1031 is fitted with the inner side of the blind inner cavity opening groove 1023, the convex joint insertion end 1033 and the concave inner cavity entrance 1022 are clearance-matched, the angle between the convex joint anchor bolt 1035 and the convex joint 1031 is 90°, and two convex joint anchor bolts 1035 are provided, and the two convex joint anchor bolts 1035 are symmetrically distributed. Such a design can make the connection between the components more stable, evenly disperse the force, and improve the structural strength of the device; As a technical solution for further implementation of the present scheme, the plug 1041 and the lock head 1042 are on the same axis, the lock head 1042 is composed of a cylinder and a sphere, the angle formed between the protrusion 1043 on the column and the plug 1041 is 90°, the outer side of the plug 1041 fits with the inner side of the sliding groove 1052 between the tubes, and the outer side of the protrusion 1043 on the column fits with the inner side of the curved groove 1053 in the tube. This design strengthens the wedging degree between the components, improves the coordination between the components, and better achieves the device effect.

[0020] Workflow: splice the concave connector 102 and the convex connector 103 located on different segment units 101: when pouring concrete, accurately pre-embed the concave connector 102 and the convex connector 103 in the segment unit 101, and then insert the convex connector 103 pre-embedded in one segment unit 101 into the sliding installation groove 1012 opened in another segment unit 101, then move the convex connector 103, so that the convex joint insertion end 1033 passes through the concave inner cavity entrance 1022, slide the boss 1032 to the inner side of the symmetrical inner inclined concave inner cavity 1024, and the convex joint 1031 will be stuck in the blind inner cavity opening groove 1023 opened on the inner side of the concave joint 1021. At this time, the concave connector 102 and the convex connector 103 are at specific positions on the end faces of the longitudinal seam 2 between the segments; The locking between the concave connector 102 and the convex connector 103 forms a seal between different segment units 101: when the concave connector 102 and the convex connector 103 are at a specific position on the end surface of the longitudinal seam 2 between the segments, a fixed connection is formed between the concave joint 1021 and the convex joint 1031, and a fixed connection is formed between the two segment units 101 through the concave joint anchor bolt 1025 and the convex joint anchor bolt 1035. At this time, the elastic sealing gasket strip 1016 on the segment body 1011 will be completely fitted with the inner side of the sealing groove 1017 opened in the other segment body 1011, thereby strengthening the sealing between the two segment bodies 1011 and preventing the concave connector 102 and the convex connector 103 in the longitudinal seam 2 between the segments from being affected by the external environment and being corroded or embrittled; The plug rod assembly 104 and the rotating tube assembly 105 respectively located on different tube segment units 101 are plugged in: when the two tube segment units 101 are close to each other, the plug column 1041 on one tube segment unit 101 is inserted into the inter-tube sliding groove 1052 on the other tube segment unit 101. When the plug column 1041 moves, it will drive the fixedly connected column protrusion 1043 to move. The setting of the inner curved groove 1053 makes the column protrusion 1043 slide inside the inner curved groove 1053, which will drive the plug-in rotating tube 1051 to rotate. The rotation of the plug-in rotating tube 1051 will drive the fixedly connected limit block 1054 to rotate, so that the rotating tube assembly 105 is rotated and stuck in the limit installation groove 1015. Since there is a clearance fit between the blind groove 1014 and the rotating tube assembly 105, one end of the plug-in rotating tube 1051 can just enter the blind groove 1014 during the rotation process, so that the two tube segment units 101 can fit together. After the plug assembly 104 and the rotating tube assembly 105 are plugged in, the tube unit 101 is locked: when the lock head 1042 enters the inner side of the installation groove 1055 in the tube, it will fit with the inner side of the arc groove 10572 and push the grinding block 10571 to slide inside the perforated gasket 10574. At the same time, the lock head 1042 will also squeeze the ball 1056, so that the multiple balls 1056 and the lock head 1042 are locked. At this time, the plug 1041 is The end is on the same plane as one end of the plug-in rotating tube 1051 and is located in the blind groove 1014 at the same time. The pipe unit 101 limits the sliding of the plug column 1041 in the plug-in rotating tube 1051. The curved groove 1053 in the tube limits the rotation of the plug column 1041 in the plug-in rotating tube 1051 through the protrusion 1043 on the column. A lock is formed between the plug rod assembly 104 and the rotating tube assembly 105, and a lock is also formed between the two pipe unit 101.

[0021] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A stable shield tunnel segment longitudinal seam splicing connector, comprising a tunnel splicing segment (1) and a longitudinal seam between segments (2), characterized in that: A plurality of tunnel splicing pipe segments (1) are provided with inter-segment longitudinal seams (2); The tunnel splicing segment (1) comprises a segment unit (101), a concave connecting piece (102) is fixedly connected to the inner side of the segment unit (101), a convex connecting piece (103) is fixedly connected to the inner side of the segment unit (101), a plug assembly (104) is fixedly connected to the inner side of the segment unit (101), and a rotating pipe assembly (105) is installed on the inner side of the segment unit (101); The segment unit (101) comprises a segment body (1011), one end of the segment body (1011) is provided with a sliding installation groove (1012), one end of the segment body (1011) is provided with a casting groove (1013), one side of the segment body (1011) is provided with a blind groove (1014), one side of the segment body (1011) is provided with a limited position installation groove (1015), one end of the segment body (1011) is fixedly connected with an elastic sealing gasket strip (1016), and one end of the segment body (1011) is provided with a sealing groove (1017); The concave connecting member (102) comprises a concave joint (1021), one side of the concave joint (1021) is provided with a concave inner cavity entrance (1022), the inner side of the concave joint (1021) is provided with a non-inner cavity opening groove (1023), the inner side of the concave joint (1021) is provided with a symmetrical inner inclined concave inner cavity (1024), and one side of the concave joint (1021) is fixed with a concave joint anchor bolt (1025) welded thereto; The male connector (103) comprises a male joint (1031), a boss (1032) being provided on one side of the male joint (1031), one end of the boss (1032) being a male joint insertion end (1033), a symmetrical inclined surface (1034) being provided on one side of the boss (1032), and a male joint anchor bolt (1035) being welded and fixed on one side of the male joint (1031); The plug rod assembly (104) comprises a plug column (1041), one end of the plug column (1041) is fixedly connected to a lock head (1042), and the outer side of the plug column (1041) is fixedly connected to a column protrusion (1043); The rotating tube assembly (105) comprises a plug-in rotating tube (1051), an inter-tube sliding groove (1052) is provided on the inner side of the plug-in rotating tube (1051), an inner tube curved groove (1053) is provided on the inner side of the plug-in rotating tube (1051), a limiting block (1054) is fixedly connected to the outer side of one end of the plug-in rotating tube (1051) located inside the tube unit (101), an inner tube installation groove (1055) is provided on the inner side of the plug-in rotating tube (1051), a ball (1056) is arranged on the inner side of the inner tube installation groove (1055), and a limiting assembly (1057) is glued and fixed inside the plug-in rotating tube (1051); The limiting assembly (1057) comprises a grinding block (10571), an arc-shaped groove (10572) is provided on the inner side of the grinding block (10571), a compression spring (10573) is fixedly connected to one side of the grinding block (10571), and a washer (10574) with a hole is slidably connected to the outer side of the grinding block (10571).

2. A stable shield tunnel segment longitudinal seam splicing connector according to claim 1, characterized in that: The concave connecting piece (102) and the convex connecting piece (103) are made of high-strength, corrosion-resistant non-metallic polymer material and are precisely pressed and formed in one step by a steel mold; the angle between the concave connecting piece (102) and the tube segment unit (101) is 90°, the angle between the convex connecting piece (103) and the tube segment unit (101) is 90°, the angle between the plug rod assembly (104) and the tube segment unit (101) is 90°, and the angle between the rotating tube assembly (105) and the tube segment unit (101) is 90°.

3. According to claim 1, a stable shield tunnel segment longitudinal seam splicing connector is characterized in that: Two of the insertion rod assemblies (104) are provided, and the two insertion rod assemblies (104) are symmetrically distributed up and down. Two of the rotation tube assemblies (105) are provided, and the two rotation tube assemblies (105) are symmetrically distributed up and down. The positions of the insertion rod assemblies (104) correspond one to one with the positions of the rotation tube assemblies (105).

4. A stable shield tunnel segment longitudinal seam splicing connector according to claim 1, characterized in that: A concave connector (102) is installed on the inner side of the sliding installation groove (1012), a convex connector (103) is fixedly connected on the inner side of the casting groove (1013), the blind groove (1014) is in the shape of a cylinder and a hexagonal prism, a rotating tube assembly (105) is fitted in the inner gap of the blind groove (1014), a rotating tube assembly (105) is installed on the inner side of the limiting installation groove (1015), and the elastic sealing pad strip (1016) and the sealing groove (1017) are engaged with each other.

5. A stable shield tunnel segment longitudinal seam splicing connector according to claim 1, characterized in that: The angle formed between the concave joint (1021) and the convex joint (1031) is 90 degrees; the side of the concave joint (1021) provided with the blind inner cavity opening groove (1023) is in the same plane as one end of the tube segment unit (101); the inner side of the symmetrical inner inclined concave inner cavity (1024) is in contact with the outer side of the boss (1032); two concave joint anchor bolts (1025) are provided, and the two concave joint anchor bolts (1025) are parallel to each other.

6. A stable shield tunnel segment longitudinal seam splicing connector according to claim 1, characterized in that: The outer side of the convex joint (1031) fits with the inner side of the blind inner cavity opening groove (1023); a clearance fit is formed between the convex joint insertion end (1033) and the concave inner cavity entrance (1022); an angle formed between the convex joint anchor bolt (1035) and the convex joint (1031) is 90°; two convex joint anchor bolts (1035) are provided, and the two convex joint anchor bolts (1035) are symmetrically distributed.

7. A stable shield tunnel segment longitudinal seam splicing connector according to claim 1, characterized in that: The plug column (1041) and the lock head (1042) are coaxial, the lock head (1042) is composed of a cylinder and a sphere, the angle between the protrusion (1043) on the column and the plug column (1041) is 90 degrees, the outer side of the plug column (1041) fits with the inner side of the inter-tube sliding groove (1052), and the outer side of the protrusion (1043) on the column fits with the inner side of the curved groove (1053) in the tube.

8. The stable shield tunnel segment longitudinal seam splicing connector according to claim 1, characterized in that: Two limit blocks (1054) are provided, and the two limit blocks (1054) are symmetrically distributed. The shape of the in-tube installation groove (1055) is composed of a cylindrical shape and a truncated cone shape. A plurality of balls (1056) are provided, and the balls (1056) are distributed in an annular array inside the in-tube installation groove (1055).

9. A stable shield tunnel segment longitudinal seam splicing connector according to claim 1, characterized in that: The grinding block (10571) and the lock head (1042) share the same axis, the grinding block (10571), the compression spring (10573) and the washer with a hole (10574) share the same axis, the inner side of the arc groove (10572) fits the outer side of the lock head (1042), and one end of the compression spring (10573) is fixedly connected to the plug-in rotating tube (1051).

10. A method for using a stable shield tunnel segment longitudinal seam splicing connector according to any one of claims 1 to 9, characterized in that: S1: splicing the concave connector (102) and the convex connector (103) respectively located on different segment units (101): when pouring concrete, the concave connector (102) and the convex connector (103) are respectively accurately pre-embedded in the segment units (101), and then the convex connector (103) pre-embedded in one segment unit (101) is inserted into the sliding installation groove (1012) provided in another segment unit (101), and then the concave connector (102) and the convex connector (103) are spliced. The male connector (103) is moved so that the male connector insertion end (1033) passes through the concave inner cavity entrance (1022), and the boss (1032) is slidably installed to the inner side of the symmetrical inner bevel concave inner cavity (1024), and the male connector (1031) is inserted into the blind inner cavity opening groove (1023) provided on the inner side of the concave connector (1021). At this time, the concave connector (102) and the male connector (103) are located at specific positions on the end faces of the longitudinal seam (2) between the pipe segments; S2: The locking between the concave connector (102) and the convex connector (103) forms a seal between different segment units (101): when the concave connector (102) and the convex connector (103) are located at specific positions on the end faces of the longitudinal seam (2) between the segments, a fixed connection is formed between the concave joint (1021) and the convex joint (1031), and a fixed connection is formed between the two segment units (101) through the concave joint anchor bolt (1025) and the convex joint anchor bolt (1035). At this time, the elastic sealing gasket strip (1016) on the segment body (1011) is completely fitted with the inner side of the sealing groove (1017) provided in the other segment body (1011), thereby strengthening the sealing between the two segment bodies (1011) and preventing the concave connector (102) and the convex connector (103) in the longitudinal seam (2) between the segments from being affected by the external environment and becoming rusted or brittle; S3: plugging the plug rod assembly (104) and the rotating tube assembly (105) respectively located on different tube segment units (101): when the two tube segment units (101) are close to each other, the plug column (1041) on one tube segment unit (101) is inserted into the tube inter-sliding groove (1052) on the other tube segment unit (101); when the plug column (1041) moves, it drives the fixedly connected column protrusion (1043) to move; the setting of the inner curved groove (1053) of the tube enables the column protrusion (1043) to be inserted into the tube. When the inner side of the curved groove (1053) slides, it drives the plug-in rotating tube (1051) to rotate. The rotation of the plug-in rotating tube (1051) drives the fixedly connected limiting block (1054) to rotate, so that the rotating tube assembly (105) is rotated and stuck in the limiting installation groove (1015). Since there is a clearance fit between the blind groove (1014) and the rotating tube assembly (105), one end of the plug-in rotating tube (1051) can just enter the blind groove (1014) during the rotation process, so that the two pipe segment units (101) can fit together. S4: After the insertion rod assembly (104) and the rotating tube assembly (105) are plugged together, the tube unit (101) is locked: when the locking head (1042) enters the inner side of the tube installation groove (1055), it will fit with the inner side of the arc groove (10572) and push the grinding block (10571) to slide inside the perforated gasket (10574). At the same time, the locking head (1042) will also squeeze the balls (1056), so that the balls (1056) and the locking head (1042) are locked. At this time, the plug (1042) is locked. 1) One end is located on the same plane as one end of the plug-in rotating tube (1051) and is located in the blind groove (1014) at the same time. The pipe segment unit (101) limits the sliding of the plug column (1041) in the plug-in rotating tube (1051). The curved groove (1053) in the tube limits the rotation of the plug column (1041) in the plug-in rotating tube (1051) through the protrusion (1043) on the column. The plug rod assembly (104) and the rotating tube assembly (105) are locked, and the two pipe segment units (101) are also locked.

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