A 25-meter-level precision control mechanized vertical excavation assembled cable working well

Abstract

This invention discloses a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable manhole, aiming to provide a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable manhole that can effectively improve the connection strength and integrity between pipe rings in the lining segment structure of the cable manhole, so as to meet the application requirements of cable manholes with an excavation diameter of 25 meters. It includes several pipe rings distributed sequentially from bottom to top. Each pipe ring includes several circumferentially evenly distributed double-wedge-shaped pipe segments. The double-wedge-shaped pipe segments include an integrally formed lower pipe segment and an upper pipe segment. The left and right sides of the lower pipe segment are downward inclined wedge surfaces, and the distance between the left and right downward inclined wedge surfaces of the lower pipe segment gradually increases from bottom to top. The upper pipe segment is located in the middle of the top surface of the lower pipe segment, and the left and right sides of the upper pipe segment are upward inclined wedge surfaces. In any two adjacent double-wedge-shaped pipe segments in the same pipe ring, the downward inclined wedge surface of one double-wedge-shaped pipe segment is closely fitted with the upward inclined wedge surface of the other double-wedge-shaped pipe segment.

Description

Technical Field

[0001] This invention relates to the field of cable tunnel working shaft technology, specifically to a 25-meter-class precision-controlled mechanized vertical tunneling assembled cable working shaft. Background Technology

[0002] Traditional precision-controlled mechanized vertical tunneling prefabricated cable working shafts typically have an excavation diameter of 18.0 meters (i.e., 18-meter precision-controlled mechanized vertical tunneling prefabricated cable working shafts), suitable for single-compartment power cable shield tunnels. Currently, another application scenario is the working shaft for double-compartment cable tunnels. Taking a double-compartment cable tunnel with an inner diameter of 4.0 meters as an example, its overall cross-sectional width is 4.60 meters (single compartment outer diameter) + 4.60 meters (or 5.0 meters) + 4.60 meters (single compartment outer diameter) = 13.80 meters. The suitable inner diameter for a straight power working shaft is 19.5 meters, and the corresponding prefabricated power shaft requires an excavation diameter of 25.0 meters. Based on the application scenario of dual-compartment cable tunnels, a precision-controlled mechanized vertical excavation prefabricated power working shaft with an excavation diameter of 25.0 meters (i.e., a 25-meter-class precision-controlled mechanized vertical excavation prefabricated cable working shaft) is needed to meet the starting, passing, and receiving working shaft requirements of dual-compartment pipe jacking or shield cable tunnels, as well as the space requirements for the layout of various auxiliary professional systems within the working shaft.

[0003] Currently, the lining segment structure of 18.0-meter-class cable manholes consists of several pipe rings distributed sequentially from bottom to top. Each pipe ring includes 6-8 circumferentially evenly distributed precast segments. The precast segments adopt a trapezoidal design with double-sided equal wedge shape. The joint structure between the pipe rings is a continuous annular joint structure, which has poor connection strength and integrity. The larger the diameter of the power cable manhole, the higher the requirements for the connection strength and integrity of the lining segment structure. Therefore, the lining segment structure of traditional 18-meter-class precision-controlled mechanized vertical tunneling prefabricated cable manholes is difficult to adapt to the application requirements of 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable manholes.

[0004] For example, Chinese Patent Publication No. CN209569012U describes an invention entitled "A Segment Lining Ring Suitable for Vertical Shafts," which includes Type A segments and Type B segments. The Type A and Type B segments are structurally symmetrical. The longitudinal section of the Type A segment is trapezoidal, and the longitudinal section of the Type B segment is an inverted trapezoid. Both the Type A and Type B segments employ a trapezoidal prefabricated segment design with equal wedge lengths on both sides. The joint structure between the segments is also a continuous annular joint structure, which similarly suffers from poor connection strength and overall integrity. Summary of the Invention

[0005] The purpose of this invention is to provide a 25-meter precision-controlled mechanized vertical tunneling prefabricated cable working well that can effectively improve the connection strength and integrity between the pipe rings of the lining segment structure of the cable working well, so as to meet the application requirements of cable working wells with an excavation diameter of 25 meters.

[0006] The technical solution of this invention is: A 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft includes several pipe rings arranged sequentially from bottom to top. Each pipe ring includes several circumferentially evenly distributed double-wedge-shaped segments. Each double-wedge-shaped segment includes an integrally formed lower segment and an upper segment. The left and right sides of the lower segment are downward-sloping wedge surfaces, and the distance between the left and right downward-sloping wedge surfaces of the lower segment gradually increases from bottom to top. The upper segment is located in the middle of the top surface of the lower segment. The left and right sides of the upper segment are upward-sloping wedge surfaces, and the distance between the left and right upward-sloping wedge surfaces of the upper segment gradually decreases from bottom to top. In any two adjacent double-wedge segments of the same tube ring, the lower inclined wedge surface of one double-wedge segment is in close contact with the upper inclined wedge surface of the other double-wedge segment. In a portion of the double-wedge segments within each tube ring, the upper segment forms an upper convex wedge block at the top of the tube ring, and the upper convex wedge blocks of the same tube ring are evenly distributed circumferentially around the tube ring. Several circumferentially evenly distributed lower wedge grooves are formed at the bottom of each tube ring, and the opposite sides of the lower wedge grooves are formed by lower inclined wedge surfaces. The upper convex wedge blocks and lower wedge grooves of the same tube ring correspond one-to-one. In any two adjacent pipe rings, the upper convex wedge of the lower pipe ring is embedded in the lower wedge groove of the upper pipe ring, and the upper inclined wedge surface of the upper convex wedge is tightly fitted with the lower inclined wedge surface of the lower wedge groove. This scheme, a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft, uses double-wedge segments. The distance between the left and right lower inclined wedge surfaces of the lower segment gradually increases from bottom to top, while the distance between the left and right upper inclined wedge surfaces of the upper segment gradually decreases from bottom to top. In any two adjacent double-wedge segments of the same pipe ring, the lower inclined wedge surface of one double-wedge segment is tightly fitted with the upper inclined wedge surface of the other double-wedge segment. This ensures that the double-wedge segments of the same pipe ring are interlocked and wedge-tightly, guaranteeing the connection stability and integrity between the double-wedge segments of the same pipe ring. Simultaneously, any phase... In two adjacent pipe rings, the upper convex wedge of the lower pipe ring is embedded in the lower wedge groove of the upper pipe ring, and the upper inclined wedge surface of the upper convex wedge is in close contact with the lower inclined wedge surface of the lower wedge groove. In this way, there is no continuous annular joint structure between the pipe rings. The pipe rings can be wedged together by the upper convex wedge and the lower wedge groove, thereby effectively improving the connection strength and integrity between the pipe rings. This, in turn, effectively improves the connection strength and integrity of the lining segment structure of the cable working well, so as to meet the application requirements of the cable working well with an excavation diameter of 25 meters and improve the structural safety of the cable working well.

[0007] Preferably, a socket-type connecting assembly is provided between any two adjacent tightly fitting lower and upper inclined wedge surfaces, comprising: The T-shaped component is fixed on one of the lower inclined wedge surface and the upper inclined wedge surface; A T-slot fitting is fixed to the other of the lower and upper inclined wedge surfaces. The T-slot fitting has vertically extending T-slots, with at least one end open. The T-slot fitting is engaged within the T-slot. Currently, adjacent segments of the same pipe ring are generally connected by transverse inclined bolts, which not only maintains the connection operation but also exposes the bolts. In this solution, two adjacent double-wedge segments are connected by a socket-type connection assembly. The T-slot fitting is engaged within the T-slot to connect the two adjacent double-wedge segments (eliminating the need for external straight bolt connections). This method is convenient; the T-slot fitting can be engaged within the T-slot during the installation of the double-wedge segments, and the socket-type connection assembly is located between the lower and upper inclined wedge surfaces, with no exposed bolts.

[0008] Preferably, a shear-resistant protrusion is provided between any two adjacent, tightly fitted lower and upper inclined wedge surfaces. The shear-resistant protrusion includes a shear-resistant recess and a shear-resistant groove, one located on the lower inclined wedge surface and the other on the upper inclined wedge surface, with the shear-resistant recess extending into the shear-resistant groove. This further improves the connection reliability between the double-wedge segments, better adapting to the unbalanced forces in the horizontal direction and the cohesion of the soil layer within the cable working shaft.

[0009] Preferably, the double-wedge-shaped segments are provided with vertical through holes, open at both ends. Along the axial direction of the cable manhole, the vertical through holes of any two adjacent double-wedge-shaped segments are connected. These interconnected vertical through holes together form a vertical channel, within which vertical prestressing tendons are installed. These tendons provide prestress to connect the segments together along the axial direction of the cable manhole. This scheme uses vertical prestressing tendons to provide prestress, connecting the segments together along the axial direction of the cable manhole. This not only effectively improves the connection strength and integrity of the lining segment structure along the axial direction of the cable manhole, but also ensures that the lower and upper inclined wedge surfaces of any two adjacent double-wedge-shaped segments are more reliably pressed together in the circumferential direction of the cable manhole, further enhancing the connection strength and integrity of the lining segment structure.

[0010] Preferably, the vertical prestressing tendons are made of steel bars with a diameter of 24 mm.

[0011] Preferably, a positioning structure is provided between any two adjacent double-wedge-shaped segments along the axial direction of the cable working well. The positioning structure includes: Two vertical positioning holes, one of which is located on the bottom surface of a double wedge-shaped tube segment, and the other is located on the top surface of another double wedge-shaped tube segment. Positioning pins are inserted into two vertical positioning holes. In this way, the position between each double wedge-shaped segment can be determined through the positioning structure.

[0012] As a preferred option, the positioning structure also includes; A limiting protrusion is provided on the top surface of a double wedge-shaped tube segment; A limiting groove is provided on the bottom surface of another double-wedge-shaped segment, and a limiting protrusion is inserted into the limiting groove. In this way, not only can the installation position accuracy of each double-wedge-shaped segment be improved, but also the connection strength and integrity between two adjacent double-wedge-shaped segments in the axial direction of the cable working well can be improved.

[0013] Preferably, the lower and upper segments of the same double-wedge tube are at the same height, and in any two adjacent double-wedge tubes in the same tube ring, the top surface of the upper segment of one double-wedge tube is flush with the top surface of the lower segment of the other double-wedge tube. In this way, adjacent double-wedge tubes can fit more tightly in the axial direction of the cable working well.

[0014] Preferably, the left and right lower inclined wedges of the lower tube segment are symmetrically distributed, and the left and right upper inclined wedges of the upper tube segment are symmetrically distributed, with any two adjacent closely fitting lower inclined wedges having the same inclination angle as the upper inclined wedges.

[0015] The beneficial effects of this invention are: the double wedge-shaped segments of the same pipe ring are interlocked and wedge-tightened with each other, and the pipe rings can be interlocked and wedge-tightened with each other through the upper convex wedge block and the lower wedge groove, thereby effectively improving the connection strength and integrity between pipe rings, and thus effectively improving the connection strength and integrity of the lining segment structure of the cable working well, so as to meet the application requirements of cable working wells with an excavation diameter of 25 meters. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the pipe ring structure of a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working well according to the present invention.

[0017] Figure 2 This is a schematic diagram of a double-wedge-shaped segment for a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working well according to the present invention.

[0018] Figure 3 This is a three-dimensional partial structural diagram of the lining segment structure of a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to the present invention.

[0019] Figure 4This is a partial cross-sectional structural diagram of the socket-type connection component of a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working well before assembly, according to the present invention.

[0020] Figure 5 This is a partial structural diagram of the socket-type connection assembly of a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working well after assembly, according to the present invention.

[0021] Figure 6 This is a partial front view of the lining segment structure of a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to the present invention.

[0022] In the picture: Pipe ring 1, upper convex wedge 1.1, lower wedge tightening groove 1.2, upper wedge tightening groove 1.3, lower convex wedge 1.4; Double wedge-shaped tube segment 2, lower tube segment 2.1, lower inclined wedge surface 2.11, receiving groove 2.12, upper tube segment 2.2, upper inclined wedge surface 2.21; Shear protrusion 3.1, shear groove 3.2; Vertical positioning hole 4.0, positioning pin 4.1, limiting protrusion 4.2; Vertical channel 5, vertical through hole 5.1; Socket connection assembly 6, T-shaped part 6.1, T-slot part 6.2, T-slot 6.21. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Specific Implementation Example 1, such as Figure 1 , Figure 2 , Figure 3 As shown, a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable manhole includes several pipe rings 1 arranged sequentially from bottom to top. Each pipe ring 1 forms the lining segment structure of the cable manhole. Each pipe ring 1 includes several circumferentially evenly distributed double-wedge-shaped segments 2. There are 6-10 double-wedge-shaped segments 2. In this embodiment, there are 8 double-wedge-shaped segments 2. The double-wedge-shaped segments 2 include an integrally formed lower segment 2.1 and an upper segment 2.2. The left and right sides of the lower segment 2.1 are lower inclined wedge surfaces 2.11. The distance between the left and right lower inclined wedge surfaces 2.11 of the lower segment 2.1 gradually increases from bottom to top. The upper segment 2.2 is located in the middle of the top surface of the lower segment 2.1. The left and right sides of the upper segment 2.2 are upper inclined wedge surfaces 2.21. The distance between the left and right upper inclined wedge surfaces 2.21 of the upper segment 2.2 gradually decreases from bottom to top.

[0024] In any two adjacent double-wedge segments 2 of the same tube ring 1, the lower inclined wedge surface 2.11 of one double-wedge segment 2 is in close contact with the upper inclined wedge surface 2.21 of the other double-wedge segment 2.

[0025] In each pipe ring 1, a portion of the upper pipe segments 2.2 of the double-wedge-shaped segments 2 form an upper convex wedge block 1.1 at the top of the pipe ring 1. In this embodiment, half of the upper pipe segments 2.2 of the double-wedge-shaped segments 2 in each pipe ring 1 form an upper convex wedge block 1.1 at the top of the pipe ring 1, and the upper convex wedge blocks 1.1 of the same pipe ring 1 are evenly distributed around the circumference of the pipe ring 1. Several circumferentially distributed lower wedge tightening grooves 1.2 are formed at the bottom of each pipe ring 1. The opposite sides of the lower wedge tightening grooves 1.2 are formed by lower inclined wedge surfaces 2.11. The distance between the opposite sides of the lower wedge tightening grooves 1.2 gradually decreases from bottom to top. The upper convex wedge blocks 1.1 and lower wedge tightening grooves 1.2 of the same pipe ring 1 correspond one-to-one.

[0026] In any two adjacent tube rings 1, the upper convex wedge 1.1 of the lower tube ring 1 is embedded in the lower wedge groove 1.2 of the upper tube ring 1, and the upper inclined wedge surface 2.21 of the upper convex wedge 1.1 is in close contact with the lower inclined wedge surface 2.11 of the lower wedge groove 1.2.

[0027] This embodiment of a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft employs double-wedge segments 2. The distance between the left and right lower inclined wedge surfaces 2.11 of the lower segment 2.1 gradually increases from bottom to top, while the distance between the left and right upper inclined wedge surfaces 2.21 of the upper segment 2.2 gradually decreases from bottom to top. In any two adjacent double-wedge segments 2 of the same pipe ring 1, the lower inclined wedge surface 2.11 of one double-wedge segment 2 is tightly fitted with the upper inclined wedge surface 2.21 of the other double-wedge segment 2. This ensures that the double-wedge segments 2 of the same pipe ring 1 are interlocked and wedge-tightly, guaranteeing the connection stability and integrity between the double-wedge segments 2 of the same pipe ring 1. Simultaneously, any two adjacent segments... In each pipe ring 1, the upper convex wedge 1.1 of the lower pipe ring 1 is embedded in the lower wedge groove 1.2 of the upper pipe ring 1, and the upper inclined wedge surface 2.21 of the upper convex wedge 1.1 and the lower inclined wedge surface 2.11 of the lower wedge groove 1.2 are tightly fitted together. In this way, there is no continuous annular joint structure between the pipe rings 1 and the pipe rings 1 can be wedged together by the upper convex wedge 1.1 and the lower wedge groove 1.2, thereby effectively improving the connection strength and integrity between the pipe rings 1 and the pipe rings 1, and thus effectively improving the connection strength and integrity of the lining segment structure of the cable working well, so as to meet the application requirements of the cable working well with an excavation diameter of 25 meters and improve the structural safety of the cable working well.

[0028] Specific embodiment two, such as Figure 1 , Figure 2 , Figure 3As shown, a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable manhole includes several pipe rings 1 arranged sequentially from bottom to top. Each pipe ring 1 forms the lining segment structure of the cable manhole. Each pipe ring 1 includes several circumferentially evenly distributed double-wedge-shaped segments 2. There are 6-10 double-wedge-shaped segments 2. In this embodiment, there are 8 double-wedge-shaped segments 2. The inner and outer surfaces of the double-wedge-shaped segments 2 are arc-shaped. The height of the double-wedge-shaped segments 2 is 2-3 meters, and the thickness is 0.6-1 meter. For example, the height of the double-wedge-shaped segments 2 is 2.5 meters, and the thickness is 0.85 meters.

[0029] The double-wedge-shaped segment 2 includes an integrally formed lower segment 2.1 and upper segment 2.2. The double-wedge-shaped segment 2 is a reinforced concrete segment. Both the lower segment 2.1 and the upper segment 2.2 are arc-shaped. The left and right sides of the lower segment 2.1 are downwardly inclined wedge surfaces 2.11. The distance between the two downwardly inclined wedge surfaces 2.11 of the lower segment 2.1 gradually increases from bottom to top. In this embodiment, the two downwardly inclined wedge surfaces 2.11 of the lower segment 2.1 are symmetrically distributed.

[0030] The upper tube segment 2.2 is located at the center of the top surface of the lower tube segment 2.1. The left and right sides of the upper tube segment 2.2 are upper inclined wedge surfaces 2.21. The distance between the two upper inclined wedge surfaces 2.21 of the upper tube segment 2.2 gradually decreases from bottom to top. In this embodiment, the two upper inclined wedge surfaces 2.21 of the upper tube segment 2.2 are symmetrically distributed, and the inclination angle of any two adjacent closely fitting lower inclined wedge surfaces 2.11 and upper inclined wedge surfaces 2.21 is the same.

[0031] In any two adjacent double-wedge segments 2 of the same tube ring 1, the lower inclined wedge surface 2.11 of one double-wedge segment 2 is in close contact with the upper inclined wedge surface 2.21 of the other double-wedge segment 2.

[0032] In each pipe ring 1, a portion of the upper pipe segments 2.2 of the double-wedge-shaped segments 2 form an upper convex wedge block 1.1 at the top of the pipe ring 1. In this embodiment, half of the upper pipe segments 2.2 of the double-wedge-shaped segments 2 in the same pipe ring 1 form an upper convex wedge block 1.1 at the top of the pipe ring 1, and the upper convex wedge blocks 1.1 of the same pipe ring 1 are evenly distributed around the circumference of the pipe ring 1. In this embodiment, in the same pipe ring 1, an upper wedge tightening groove 1.3 is formed between any two adjacent upper convex wedge blocks 1.1, and the upper wedge tightening grooves 1.3 of the same pipe ring 1 are evenly distributed around the circumference of the pipe ring 1. The upper convex wedge blocks 1.1 and the upper wedge tightening grooves 1.3 of the same pipe ring 1 are alternately distributed.

[0033] Each tube ring 1 has several circumferentially distributed lower wedge grooves 1.2 at its bottom, with the openings of the lower wedge grooves 1.2 facing downwards. The opposite sides of the lower wedge grooves 1.2 are formed by lower inclined wedge surfaces 2.11. The distance between the opposite sides of the lower wedge grooves 1.2 gradually decreases from bottom to top. The upper convex wedges 1.1 of the same tube ring 1 correspond one-to-one with the lower wedge grooves 1.2. In this embodiment, half of the lower tube segments 2.1 in each tube ring 1 form lower convex wedges 1.4 at the bottom of the tube ring 1, and the lower convex wedges 1.4 of the same tube ring 1 are evenly distributed circumferentially around the tube ring 1. The lower convex wedges 1.4 and the lower wedge grooves 1.2 are distributed alternately. The lower convex wedges 1.4 of the same tube ring 1 correspond one-to-one with the upper wedge grooves 1.3.

[0034] In any two adjacent tube rings 1, the upper convex wedge 1.1 of the lower tube ring 1 is embedded in the lower wedge groove 1.2 of the upper tube ring 1, and the upper inclined wedge surface 2.21 of the upper convex wedge 1.1 is in close contact with the lower inclined wedge surface 2.11 of the lower wedge groove 1.2.

[0035] In this embodiment, in any two adjacent tube rings 1, the lower convex wedge 1.4 of the upper tube ring 1 is embedded in the upper wedge groove 1.3 of the lower tube ring 1, and the lower inclined wedge surface 2.11 of the lower convex wedge 1.4 is closely fitted with the upper inclined wedge surface 2.21 of the upper wedge groove 1.3.

[0036] In this embodiment, the lower segment 2.1 and the upper segment 2.2 of the same double wedge segment 2 have the same height. In any two adjacent double wedge segments 2 in the same pipe ring 1, the top surface of the upper segment 2.2 of one double wedge segment 2 is flush with the top surface of the lower segment 2.1 of the other double wedge segment 2.

[0037] This embodiment of a 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft employs double-wedge segments 2. The distance between the left and right lower inclined wedge surfaces 2.11 of the lower segment 2.1 gradually increases from bottom to top, while the distance between the left and right upper inclined wedge surfaces 2.21 of the upper segment 2.2 gradually decreases from bottom to top. In any two adjacent double-wedge segments 2 of the same pipe ring 1, the lower inclined wedge surface 2.11 of one double-wedge segment 2 is tightly fitted with the upper inclined wedge surface 2.21 of the other double-wedge segment 2. This ensures that the double-wedge segments 2 of the same pipe ring 1 are interlocked and wedge-tightly, guaranteeing the connection stability and integrity between the double-wedge segments 2 of the same pipe ring 1. Simultaneously, any two adjacent segments... In each pipe ring 1, the upper convex wedge 1.1 of the lower pipe ring 1 is embedded in the lower wedge groove 1.2 of the upper pipe ring 1, and the upper inclined wedge surface 2.21 of the upper convex wedge 1.1 and the lower inclined wedge surface 2.11 of the lower wedge groove 1.2 are tightly fitted together. In this way, there is no continuous annular joint structure between the pipe rings 1 and the pipe rings 1 can be wedged together by the upper convex wedge 1.1 and the lower wedge groove 1.2, thereby effectively improving the connection strength and integrity between the pipe rings 1 and the pipe rings 1, and thus effectively improving the connection strength and integrity of the lining segment structure of the cable working well, so as to meet the application requirements of the cable working well with an excavation diameter of 25 meters and improve the structural safety of the cable working well.

[0038] Furthermore, such as Figure 4 , Figure 5 As shown, a socket-type connecting assembly 6 is provided between any two adjacent, tightly fitted lower inclined wedge surfaces 2.11 and upper inclined wedge surfaces 2.21. Specifically, In one embodiment, in the same tube ring 1, a socket-type connecting component 6 is provided between any two adjacent tightly fitting lower inclined wedge surfaces 2.11 and upper inclined wedge surfaces 2.21.

[0039] In another embodiment, in the same tube ring 1, a socket-type connecting assembly 6 is provided between any two adjacent tightly fitting lower inclined wedge surfaces 2.11 and upper inclined wedge surfaces 2.21. A socket-type connecting assembly 6 is also provided between any two adjacently distributed tube rings 1 and any two adjacent tightly fitting lower inclined wedge surfaces 2.11 and upper inclined wedge surfaces 2.21.

[0040] like Figure 4 , Figure 5As shown, the socket-type connection assembly 6 includes a T-shaped member 6.1 and a T-slot member 6.2. The T-shaped member 6.1 is fixed to one of the lower inclined wedge surface 2.11 and the upper inclined wedge surface 2.21. The T-slot member 6.2 is fixed to the other of the lower inclined wedge surface 2.11 and the upper inclined wedge surface 2.21. The T-slot member 6.2 has a vertically extending T-slot 6.21, with at least one end open, and the T-shaped member 6.1 is engaged within the T-slot 6.21. Currently, adjacent segments of the same pipe ring 1 are generally connected by transversely inclined bolts, which not only maintains the connection operation but also exposes the bolt structure. In this scheme, two adjacent double-wedge tube segments 2 are connected by a socket-type connecting assembly 6. The T-shaped piece 6.1 is inserted into the T-slot to connect the two adjacent double-wedge tube segments 2 (without the need for an external straight bolt connection structure). The operation is convenient. During the installation of the double-wedge tube segments 2, the T-shaped piece 6.1 can be inserted into the T-slot, and the socket-type connecting assembly 6 is located between the lower inclined wedge surface 2.11 and the upper inclined wedge surface 2.21, which are closely fitted, with no exposed bolts.

[0041] In one implementation, such as Figure 4 As shown, the T-shaped member 6.1 of the socket-type connecting assembly 6 is fixed to the upper inclined wedge surface 2.21, and the T-shaped member 6.1 protrudes outward from the upper inclined wedge surface 2.21. The T-shaped groove member 6.2 of the socket-type connecting assembly 6 is fixed to the lower inclined wedge surface 2.11. The lower inclined wedge surface 2.11 is provided with a receiving groove 2.12, which extends vertically and has an open lower end. The T-shaped groove member 6.2 is fixed inside the receiving groove 2.12 and is completely received inside the receiving groove 2.12. The T-shaped groove member 6.2 is provided with vertically extending T-shaped grooves 6.21, which are vertically distributed. The lower end of the T-shaped groove 6.21 is open, and the lower end opening of the T-shaped groove 6.21 faces the lower end opening of the receiving groove 2.12. The T-shaped member 6.1 is engaged in the T-shaped groove. During the top-to-bottom hoisting of the double-wedge tube segment 2, the T-shaped component 6.1 is inserted into the T-slot through the lower opening of the T-slot to connect two adjacent double-wedge tube segments 2. Since the T-slot component 6.2 is completely accommodated inside the receiving groove 2.12, this will not affect the tight fit between the lower inclined wedge surface 2.11 and the upper inclined wedge surface 2.21.

[0042] In this embodiment, the socket-type connecting assembly 6 comprises one or more T-shaped members 6.1, and the multiple T-shaped members 6.1 are distributed sequentially along the thickness direction of the double wedge-shaped tube segment 2. T-shaped groove members 6.2 correspond one-to-one with T-shaped members 6.1, and the T-shaped members 6.1 are engaged in the corresponding T-shaped grooves. In this embodiment, there are two T-shaped members 6.1, and the two T-shaped members 6.1 are distributed sequentially along the thickness direction of the double wedge-shaped tube segment 2. There are also two corresponding T-shaped groove members 6.2, and the two T-shaped groove members 6.2 are distributed sequentially along the thickness direction of the double wedge-shaped tube segment 2.

[0043] In another embodiment, the T-shaped member 6.1 of the socket-type connecting assembly 6 is fixed to the lower inclined wedge surface 2.11, and the T-shaped member 6.1 protrudes outward from the lower inclined wedge surface 2.11. The T-shaped groove member 6.2 of the socket-type connecting assembly 6 is fixed to the upper inclined wedge surface 2.21. The upper inclined wedge surface 2.21 is provided with a receiving groove that extends vertically and has an open upper end. The T-shaped groove member 6.2 is fixed inside the receiving groove and is completely received inside the receiving groove. The T-shaped groove member 6.2 is provided with vertically extending T-shaped grooves 6.21 that are vertically distributed, with open upper and lower ends, and the upper opening of the T-shaped groove 6.21 facing the upper opening of the receiving groove. The T-shaped member 6.1 is engaged in the T-shaped groove. During the top-to-bottom hoisting of the double wedge-shaped tube segment 2, the T-shaped component 6.1 is inserted into the T-shaped groove through the upper opening of the T-shaped groove to connect two adjacent double wedge-shaped tube segments 2.

[0044] In this embodiment, the socket-type connecting assembly 6 comprises one or more T-shaped members 6.1, and the multiple T-shaped members 6.1 are distributed sequentially along the thickness direction of the double wedge-shaped tube segment 2. T-shaped groove members 6.2 correspond one-to-one with T-shaped members 6.1, and the T-shaped members 6.1 are engaged in the corresponding T-shaped grooves. In this embodiment, there are two T-shaped members 6.1, and the two T-shaped members 6.1 are distributed sequentially along the thickness direction of the double wedge-shaped tube segment 2. There are also two corresponding T-shaped groove members 6.2, and the two T-shaped groove members 6.2 are distributed sequentially along the thickness direction of the double wedge-shaped tube segment 2.

[0045] Furthermore, such as Figure 4 As shown, both T-shaped component 6.1 and T-slot component 6.2 are prefabricated metal parts. T-shaped component 6.1 is fixed to one of the lower inclined wedge surface 2.11 and the upper inclined wedge surface 2.21 by anchor bolts. T-slot component 6.2 is fixed to the other of the lower inclined wedge surface 2.11 and the upper inclined wedge surface 2.21 by anchor bolts. This facilitates the time-consuming processing and manufacturing of T-shaped component 6.1 and T-slot component 6.2, and ensures the stability of the foot bone of the socket-type connecting assembly 6 itself.

[0046] Furthermore, such as Figure 2 As shown, a shear-resistant protrusion is provided between any two adjacent, tightly fitted lower wedge surfaces 2.11 and upper wedge surfaces 2.21. The shear-resistant protrusion includes a shear-resistant protrusion 3.1 and a shear-resistant groove 3.2, one located on the lower wedge surface 2.11 and the other on the upper wedge surface 2.21. The shear-resistant protrusion 3.1 extends into the shear-resistant groove 3.2. This further improves the connection reliability between the double-wedge segments 2, better adapting to the unbalanced forces in the horizontal direction and the cohesion of the soil layer in the cable working well.

[0047] In one example, the shear-resistant protrusion 3.1 of the shear-resistant boss is located on the upper inclined wedge surface 2.21, and the shear-resistant protrusion 3.1 and the double wedge-shaped tube segment 2 are integrally formed. The shear-resistant groove 3.2 of the shear-resistant boss is located on the lower inclined wedge surface 2.11, and the shear-resistant groove 3.2 and the double wedge-shaped tube segment 2 are integrally formed. During the top-to-bottom hoisting process of the double wedge-shaped tube segment 2, the shear-resistant protrusion 3.1 extends into the shear-resistant groove 3.2.

[0048] In one example, the shear-resistant protrusion 3.1 of the shear-resistant boss is located on the lower inclined wedge surface 2.11, and the shear-resistant protrusion 3.1 and the double wedge-shaped tube segment 2 are integrally formed. The shear-resistant groove 3.2 of the shear-resistant boss is located on the upper inclined wedge surface 2.21, and the shear-resistant groove 3.2 and the double wedge-shaped tube segment 2 are integrally formed. During the top-to-bottom hoisting process of the double wedge-shaped tube segment 2, the shear-resistant protrusion 3.1 extends into the shear-resistant groove 3.2.

[0049] Furthermore, such as Figure 2 , Figure 6 As shown, the double-wedge-shaped tube segment 2 is provided with a vertical through hole 5.1. The vertical through hole 5.1 is open at both the top and bottom. In the axial direction of the cable working well, any two adjacent vertical through holes 5.1 of the double-wedge-shaped tube segments 2 are connected. In the axial direction of the cable working well, the interconnected vertical through holes 5.1 together form a vertical channel 5. Vertical prestressing tendons are provided in the vertical channel 5. The vertical prestressing tendons provide prestress to connect the tube rings 1 together along the axial direction of the cable working well. In this embodiment, the vertical prestressing tendons are made of steel bars with a diameter of 24 mm. Of course, the vertical prestressing tendons can be made of steel bars of other diameters or steel wire ropes. In this embodiment, prestress is provided by vertical prestressing tendons to connect each pipe ring 1 together along the axial direction of the cable working well. In this way, not only can the connection strength and integrity of the lining segment structure in the axial direction of the cable working well be effectively improved, but also the prestress provided by the vertical prestressing tendons can make the lower inclined wedge surface 2.11 and the upper inclined wedge surface 2.21 of any two adjacent double wedge segments 2 in the circumferential direction of the cable working well be more reliably pressed together, further improving the connection strength and integrity of the lining segment structure.

[0050] There are one or more vertical through holes 5.1 on the same double-wedge-shaped tube segment 2. In this embodiment, there are multiple vertical through holes 5.1 on the same double-wedge-shaped tube segment 2, and each vertical through hole 5.1 is distributed equidistantly along the circumference of the cable working well. The number of vertical through holes 5.1 on each double-wedge-shaped tube segment 2 is the same, and their distribution positions are also consistent. In the axial direction of the cable working well, the corresponding vertical through holes 5.1 in any two adjacent double-wedge-shaped tube segments 2 are connected; in the axial direction of the cable working well, the interconnected vertical through holes 5.1 together constitute a vertical channel 5; thus forming several vertical channels 5, each of which is provided with vertical prestressing tendons. The vertical prestressing tendons provide prestress to connect each tube ring 1 together along the axial direction of the cable working well.

[0051] Furthermore, such as Figure 2 , Figure 6 As shown, a positioning structure is provided between any two adjacent double-wedge-shaped segments 2 along the axial direction of the cable working well. The positioning structure includes; Two vertical positioning holes 4.0, one of which is located on the bottom surface of a double wedge-shaped tube 2, and the other is located on the top surface of another double wedge-shaped tube 2; Positioning pins 4.1 are inserted into the two vertical positioning holes 4.0. In this way, the position between each double wedge-shaped tube segment 2 can be determined through the positioning structure.

[0052] Furthermore, such as Figure 2 As shown, the positioning structure also includes a limiting protrusion 4.2 and a limiting groove. The limiting protrusion 4.2 is located on the top surface of one double-wedge-shaped tube segment 2, and the limiting groove is located on the bottom surface of the other double-wedge-shaped tube segment 2. The limiting protrusion 4.2 is inserted into the limiting groove. In this way, not only can the installation position accuracy of each double-wedge-shaped tube segment 2 be improved, but also the connection strength and integrity between two adjacent double-wedge-shaped tube segments 2 in the axial direction of the cable working well can be improved.

[0053] In this embodiment, in the same positioning structure, one of the two vertical positioning holes 4.0 is located in the middle of the end face of the limiting protrusion 4.2, and the other vertical positioning hole 4.0 is located in the middle of the bottom surface of the limiting groove.

[0054] Furthermore, the section of the lining segment structure corresponding to the cable tunnel is also equipped with a closed steel mesh structure to accommodate the later treatment of the cable tunnel portal opening in the lining segment structure.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft, characterized in that, The device comprises several tube rings arranged sequentially from bottom to top. Each tube ring includes several circumferentially evenly distributed double-wedge-shaped tube segments. Each double-wedge-shaped tube segment includes an integrally formed lower tube segment and an upper tube segment. The left and right sides of the lower tube segment are downwardly inclined wedge surfaces, and the distance between the left and right downwardly inclined wedge surfaces of the lower tube segment gradually increases from bottom to top. The upper tube segment is located in the middle of the top surface of the lower tube segment. The left and right sides of the upper tube segment are upwardly inclined wedge surfaces, and the distance between the left and right upwardly inclined wedge surfaces of the upper tube segment gradually decreases from bottom to top. In any two adjacent double-wedge segments of the same tube ring, the lower inclined wedge surface of one double-wedge segment is in close contact with the upper inclined wedge surface of the other double-wedge segment.

2. The 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to claim 1, characterized in that, In each pipe ring, the upper pipe segment of a portion of the double-wedge-shaped pipe segments forms an upper convex wedge block at the top of the pipe ring, and the upper convex wedge blocks of the same pipe ring are evenly distributed around the circumference of the pipe ring; several circumferentially evenly distributed lower wedge tightening grooves are formed at the bottom of each pipe ring, and the opposite sides of the lower wedge tightening grooves are formed by lower inclined wedge surfaces; the upper convex wedge blocks and lower wedge tightening grooves of the same pipe ring correspond one-to-one. In any two adjacent pipe rings, the upper convex wedge of the lower pipe ring is embedded in the lower wedge groove of the upper pipe ring, and the upper inclined wedge surface of the upper convex wedge is in close contact with the lower inclined wedge surface of the lower wedge groove.

3. The 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to claim 1, characterized in that, A socket-type connecting assembly is provided between any two adjacent, tightly fitted lower and upper inclined wedge surfaces, comprising: The T-shaped component is fixed on one of the lower inclined wedge surface and the upper inclined wedge surface; The T-slot is fixed on the other of the lower and upper inclined wedge surfaces. The T-slot has a T-slot extending vertically, with at least one end of the T-slot open. The T-slot is engaged in the T-slot.

4. A 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to claim 1, 2, or 3, characterized in that, A shear-resistant protrusion is provided between any two adjacent closely fitting lower and upper inclined wedge surfaces. The shear-resistant protrusion includes a shear-resistant recess and a shear-resistant groove, one of which is located on the lower inclined wedge surface and the other on the upper inclined wedge surface. The shear-resistant recess extends into the shear-resistant groove.

5. A 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to claim 1, 2, or 3, characterized in that, The double-wedge-shaped tube segment is provided with vertical through holes, with openings at both the top and bottom. In the axial direction of the cable working well, the vertical through holes of any two adjacent double-wedge-shaped tube segments are connected. In the axial direction of the cable working well, the interconnected vertical through holes together form a vertical channel. Vertical prestressing tendons are provided in the vertical channel, and the vertical prestressing tendons provide prestress to connect the tube rings together along the axial direction of the cable working well.

6. A 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to claim 5, characterized in that, The vertical prestressing tendons are made of steel bars with a diameter of 24 mm.

7. A 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to claim 1, 2, or 3, characterized in that, A positioning structure is provided between any two adjacent double-wedge-shaped segments along the axial direction of the cable working well. The positioning structure includes: Two vertical positioning holes, one of which is located on the bottom surface of a double wedge-shaped tube segment, and the other is located on the top surface of another double wedge-shaped tube segment. The locating pins are inserted into the two vertical locating holes.

8. A 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to claim 7, characterized in that, The positioning structure also includes; A limiting protrusion is provided on the top surface of a double wedge-shaped tube segment; A limiting groove is provided on the bottom surface of another double wedge-shaped tube, and a limiting protrusion is inserted into the limiting groove.

9. A 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to claim 1, 2, or 3, characterized in that, The lower and upper segments of the same double wedge tube segment have the same height. In any two adjacent double wedge tube segments in the same tube ring, the top surface of the upper segment of one double wedge tube segment is flush with the top surface of the lower segment of the other double wedge tube segment.

10. A 25-meter-class precision-controlled mechanized vertical tunneling prefabricated cable working shaft according to claim 1, 2, or 3, characterized in that, The left and right lower inclined wedges of the lower tube segment are symmetrically distributed, and the left and right upper inclined wedges of the upper tube segment are symmetrically distributed. Any two adjacent closely fitted lower inclined wedges and upper inclined wedges have the same inclination angle.

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