Pipe piece and electric power tunnel vertical shaft pipe piece structure using same

Abstract

The invention discloses a duct piece and an electric power tunnel vertical shaft duct piece structure using the duct piece, the duct piece comprises an arc-shaped duct piece main body, and the circular seam position of the duct piece main body comprises an axial insertion part on the inner side and an axial butt joint part on the outer side; the tenon and the groove are matched between adjacent pipe pieces in an inserted mode, the circular seam connecting piece and the circular seam connecting hole are matched with each other in an inserted mode, the longitudinal seam position of the pipe piece body is a plane type longitudinal seam end face and is provided with a bolt installation hole, and a hand hole of the bolt installation hole is formed in the outer arc face of the pipe piece body. In the electric power tunnel vertical shaft duct piece structure, a plurality of first duct pieces and second duct pieces which are spliced alternately are arranged in an annular pipe joint, grooves are formed in the left edge and the right edge of each first duct piece, the grooves are not provided with outer side walls, and tenons are arranged on the left edge and the right edge of each second duct piece; the longitudinal joints between the adjacent pipe sections are spliced in a staggered mode, after the adjacent pipe sections are spliced, the end faces of the tenons are attached to the bottoms of the grooves, and the end faces of the axial butt joint parts are attached to each other.

Description

Technical Field

[0001] This invention relates to the field of existing shield tunnel shaft segment structure design and construction technology, and in particular to a segment and a power tunnel shaft segment structure using the segment. Background Technology

[0002] Shield tunneling boasts advantages such as high efficiency, safety, and minimal environmental impact, making it widely used in underground space construction. With its application in municipal utility tunnels and small-section power tunnels, the number of small-diameter shield tunneling projects is gradually increasing, especially in power tunnels. In power tunnel projects, to meet operation and maintenance needs, numerous small-section inspection wells with an inner diameter of approximately 1 meter are required along the route. When constructing such vertical shafts using upward excavation methods, the extremely confined space inside the shaft makes it impossible for construction personnel to enter and operate, posing significant challenges to the precise positioning and efficient assembly of the tunnel segments. During hoisting and positioning, vertical shaft segments are prone to skewness and misalignment, making it difficult to adjust them to the designed orientation. The assembly process relies entirely on assembly equipment, lacking real-time manual observation and flexible fine-tuning, resulting in low construction accuracy, poor efficiency, and safety risks.

[0003] Existing shaft segment assembly technologies and equipment are mostly suitable for large-diameter shafts accessible to personnel, and their complex structures cannot adapt to the extremely limited unmanned operation scenarios described above. Therefore, how to achieve convenient, accurate, and rapid unmanned assembly of segments in small-section shafts has become a key issue restricting the quality and progress of such projects.

[0004] For example, patent application CN110307006A discloses a tenon-and-mortise type shield tunnel segment and its connection method. This method involves sequentially arranging the segments into inner, middle, and outer layers from the inside out, then tenoning multiple segments circumferentially and longitudinally, and finally connecting them with straight bolts along the tunnel's radial direction at the joints to form the entire shield tunnel. This type of segment is accurately positioned and avoids misalignment during assembly. However, it requires multiple straight bolts for longitudinal and circumferential joints, increasing the bolt tightening workload. Furthermore, the numerous layers from the inside out complicate the assembly process.

[0005] For example, patent application CN120083531A discloses a wing-shaped structural segment and a prefabricated lining structure. This wing-shaped structural segment includes a first segment and a second segment, which are integrally connected along a first direction. After assembly, this type of segment will not have through seams in either the circumferential or longitudinal directions. However, this segment structure still has multiple bolts for longitudinal and circumferential seams, increasing the workload of bolt tightening. Furthermore, the numerous angles at the joints are detrimental to waterproofing. Misalignment during assembly may also occur.

[0006] For example, utility model patent CN218093045U discloses a preliminary lining segment structure for a shield tunnel, including segment body one and segment body two, with the two types of segments closely connected. The segments are equipped with several bolt connection structures. This segment structure also suffers from problems such as a large amount of bolt tightening work, numerous joint angles which are not conducive to waterproofing, and misalignment during assembly.

[0007] Therefore, for power tunnel shaft segments, there is an urgent need to design a segment structure that can meet the requirements of segment connection strength, can be accurately positioned, can be quickly and easily assembled, and does not affect the waterproof performance of segment joints.

[0008] It should be noted that the above technical information is the result of the applicant's inventive analysis. This description is only intended to deepen the understanding of the general background technology of the present invention by those skilled in the art, and should not be regarded as an admission or implication in any form that the following technical information constitutes prior art known to those skilled in the art. Summary of the Invention

[0009] To address the shortcomings in the aforementioned background technology, this invention proposes a segment and a segment structure for power tunnel shafts using the segment. The technical problem to be solved is: how to simultaneously ensure the connection strength of the segment, accurate positioning, quick and easy assembly, and without affecting the waterproof performance of the segment joints in small-section shafts with limited operating space, small construction working face, and inconvenient segment assembly operations.

[0010] The technical solution of this invention is as follows:

[0011] A type of pipe segment includes an arc-shaped pipe segment body. The circumferential seam of the pipe segment body includes an inner axial insertion portion and an outer axial mating portion. The axial insertion portion includes a tenon and a groove for interlocking between adjacent pipe segments, as well as an circumferential seam connector and an circumferential seam connection hole for interlocking. The longitudinal seam of the pipe segment body is a planar longitudinal seam end face and is provided with bolt mounting holes. The hand hole of the bolt connection hole is located on the outer arc surface of the pipe segment body.

[0012] The beneficial effects of this technical solution are as follows: ① The axial insertion part achieves automatic and precise alignment of the circumferential segments through the double insertion cooperation of the tenon-groove and the connector-connecting hole, avoiding skewing and misalignment during hoisting and positioning from the root, and adapting to unmanned assembly scenarios without manual fine-tuning; ② The outer axial docking part and the insertion part cooperate to form a dual structure of "insertion positioning + docking sealing", which not only ensures the structural stability of the circumferential joint splicing, but also provides a basic bonding surface for joint waterproofing; ③ The longitudinal joint adopts a flat end face, replacing the multi-angle joint of the existing technology, reducing weak points in joint waterproofing and improving the reliability of longitudinal joint sealing; ④ The bolt hand holes are located on the outer arc surface, which is suitable for operation scenarios where personnel cannot enter the small cross-section vertical shaft. The assembly equipment can directly complete the bolt tightening from the outside, solving the problem of inconvenient bolt operation in narrow spaces; ⑤ The combination connection method of circumferential joint insertion + longitudinal joint bolt takes into account the connection strength of the segments and the convenience of assembly, reducing the number of bolts used while ensuring the stress stability of the overall structure.

[0013] Based on the above technical solution, as a preferred technical solution for the segment, both ends of the segment body in the axial direction are provided with tenons and grooves.

[0014] The further beneficial effects of this technical solution are as follows:

[0015] Beneficial effects: ① The two-way tenon and mortise structure makes the circumferential force of the segments more uniform, disperses the local stress at the splicing point, improves the overall stability of the circumferential connection of the segments, and adapts to the force requirements of equipment hoisting and alignment during unmanned assembly; ② With tenons and mortises at both ends, it is possible to achieve seamless splicing of segments in the circumferential direction without distinguishing the splicing direction, simplifying the operation logic of the assembly equipment and improving the efficiency of unmanned assembly.

[0016] Based on the above technical solution, as a preferred technical solution for the segment, the two ends of the segment body in the axial direction are respectively provided with a tenon and a groove.

[0017] The further beneficial effects of this technical solution are: ① The unidirectional tenon and mortise structure simplifies the segment processing technology. Compared with tenons and mortises at both ends, it reduces production and manufacturing costs while ensuring the accuracy of splicing; ② After splicing, the tenons and mortises form a unidirectional limit to prevent the segments from moving, further improving the structural stability of the circumferential splicing and avoiding loosening of the joints in later use.

[0018] Based on the above technical solutions, as a preferred technical solution for the segment, the circumferential joint connector is located at the bottom of the groove, and the circumferential joint connection hole is located at the end face of the tenon.

[0019] Further beneficial effects of this technical solution are as follows: ① During the splicing process, as the tenon is inserted into the groove, the connector can be automatically inserted into the connection hole, eliminating the need for manual or equipment-specific alignment of the connector and achieving "interlocking positioning + simultaneous connection completion," significantly improving the efficiency of unmanned assembly; ② The connector is hidden at the bottom of the groove, and the connection hole is located on the end face of the tenon. After splicing, the connector is completely enclosed within the interlocking part, preventing collision damage to the connector during hoisting and assembly, and ensuring the reliability of the connection structure; ③ The coaxial alignment of the connector and the connection hole is guided by the mortise and tenon structure, eliminating the need for additional calibration, further reducing assembly errors and improving the accuracy of circumferential joint connections.

[0020] Based on the above technical solution, as a preferred technical solution for the tube segment, the tenon protrudes from the axial docking portion, and the groove is recessed relative to the axial docking portion.

[0021] The further beneficial effects of this technical solution are as follows: ① During splicing, coarse positioning is achieved first through "tenon embedding into groove", and then fine positioning is achieved through "axial mating end face fitting". The dual positioning mechanism completely eliminates the problem of misalignment during splicing and is suitable for scenarios without unmanned operation or fine adjustment; ② The structure of protruding tenon and recessed groove forms a natural limit, preventing the segments from shifting radially and circumferentially, ensuring that the splicing posture is consistent with the design, and improving the overall forming accuracy of the shaft segments; ③ The mating end faces of the mating part form a continuous circumferential sealing surface, providing a flat foundation for subsequent waterproof sealing and avoiding the problem of poor sealing caused by positioning deviation.

[0022] Based on the above technical solutions, as a preferred technical solution for the segment, an annular seal mounting groove is provided between the axial insertion part and the outer axial docking part.

[0023] The further beneficial effects of this technical solution are as follows: ① The sealing groove is precisely positioned, and after splicing, the sealing element is tightly compressed by the insertion part and the mating part to form a continuous circumferential waterproof seal, effectively preventing groundwater leakage and meeting the waterproofing requirements of power tunnel shafts; ② The sealing groove is located between the insertion part and the mating part, without affecting the tenon and mortise joint positioning, achieving the mutual non-interference of the "positioning" and "waterproofing" functions, taking into account both structural performance and waterproofing performance; ③ The sealing element is installed in a dedicated groove, avoiding displacement or detachment of the sealing element during assembly, ensuring the stability of the waterproofing effect, and reducing the potential leakage risks in later operation and maintenance.

[0024] Based on the above technical solution, as a preferred technical solution for the segment, the longitudinal seam is provided with longitudinal seam sealing grooves located on both sides of the bolt mounting hole, wherein the outer longitudinal seam sealing groove corresponds to the circumferential seam sealing groove.

[0025] Further beneficial effects of this technical solution are: ① Sealing grooves on both sides of the bolt mounting holes can seal the leakage channels around the bolt holes, preventing the bolt holes from becoming weak points in waterproofing; ② The longitudinal joint sealing groove corresponds to the circumferential joint sealing groove, and after splicing, the circumferential and longitudinal joint seals form a closed-loop sealing structure, fully covering the joints of the pipe segments and significantly improving the overall impermeability of the shaft segments; ③ The planar longitudinal joint, combined with the sealing groove, replaces the multi-angle joints of the existing technology, and the sealing element is compressed more evenly, avoiding the problem of poor sealing at the corners, and adapting to the waterproofing requirements of small-section shafts.

[0026] Based on the above technical solution, as a preferred technical solution for the tube segment, the tenon and groove are equally divided and alternately arranged along the arc length of the tube segment body.

[0027] The further beneficial effects of this technical solution are as follows: ① The evenly distributed alternating tenon and mortise joints ensure uniform stress distribution during circumferential splicing of the segments, avoiding segment cracking and joint deformation caused by local stress concentration, and improving the overall structural durability; ② The evenly distributed positioning points further reduce the risk of assembly misalignment, resulting in more balanced stress distribution during unmanned equipment alignment and ensuring the stability of the assembly posture; ③ The evenly distributed alternating structural pattern simplifies the alignment algorithm of the assembly equipment, improves the operational efficiency of unmanned assembly, and facilitates the standardized production and interchangeable use of segments.

[0028] A power tunnel shaft segment structure includes several segments as described in any of the above technical solutions.

[0029] The beneficial effects of this technical solution are as follows: ① The overall structure inherits the advantages of individual segments, such as precise positioning, convenient assembly, reliable waterproofing, and high-strength connection, and is fully adaptable to the unmanned assembly scenario of small-section power tunnel shafts; ② The standardized segments are spliced ​​to form a complete shaft lining, which meets the structural requirements of small-section inspection wells required for the operation and maintenance of power tunnels, and solves the problems of difficult assembly, low precision, and high leakage risk of existing shaft structures; ③ The standardized design of the segments can realize factory prefabrication and on-site assembly, improve construction efficiency, shorten the construction period, and at the same time ensure the quality and stability of the shaft structure.

[0030] Based on the above technical solution, as a preferred technical solution for the vertical shaft segment structure of the power tunnel, a ring segment includes several alternately spliced ​​segments one and two. The left and right edges of segment one are grooves without outer walls, and the left and right edges of segment two are tenons. The longitudinal joints between adjacent segments are staggered. After the adjacent segments are spliced, the end face of the tenon fits with the bottom of the groove, and the end faces of the axial mating parts fit together.

[0031] The further beneficial effects of this technical solution are as follows: ① The groove of segment one has no outer wall, allowing the tenon of segment two to be inserted more smoothly during splicing, making the alignment of unmanned equipment more convenient and further improving the assembly efficiency; ② The alternating splicing of segment one and segment two ensures uniform circumferential stress, avoids stress imbalance caused by a single segment type, and improves the stability of the circumferential structure; ③ The staggered splicing of longitudinal joints of adjacent pipe sections avoids through joints, significantly improving the overall shear resistance and impermeability of the vertical shaft segment structure and ensuring the structural safety for long-term use; ④ The double fit of the tenon-groove bottom and the axial mating part further strengthens the positioning and sealing effect, completely eliminating misalignment and leakage, and achieving the goal of "high precision, high sealing, and high efficiency" for unmanned assembly of small cross-section vertical shafts.

[0032] This invention, through dual optimization of the segment structure and the shaft segment structure, fundamentally solves the core pain points of segment assembly and positioning difficulties, low efficiency, poor accuracy, weak waterproofing, and insufficient connection strength in scenarios where the space within the shaft of a small-section power tunnel is confined and manual operation is impossible. The overall beneficial effects can be summarized as follows:

[0033] Adaptable to unmanned operation and breaking through space limitations: The design of the segment mortise and tenon joint, automatic alignment, and external arc hand hole is fully adapted to unmanned assembly scenarios in which personnel cannot enter small cross-section vertical shafts. Without the need for manual observation and fine-tuning, the assembly equipment can independently complete precise alignment, connection, and fastening operations, solving the construction problem in extremely limited spaces.

[0034] Precise positioning prevents misalignment and improves assembly accuracy: Through the double insertion positioning of tenon-groove and connector-connecting hole, combined with the precise positioning mechanism of the mating part, as well as the structural design of staggered splicing and alternating tenon and mortise, the skewing and misalignment during the hoisting, positioning and assembly of the segments are completely avoided, ensuring that the forming accuracy of the shaft segments meets the design requirements.

[0035] Quick and efficient assembly, shortening the construction period: The assembly process is simplified, and "plug-in positioning + connection + sealing" are completed simultaneously, reducing the number of bolts used and the amount of tightening work. It replaces the complex layered and multi-bolt connection structure of the existing technology, greatly improving the efficiency of unmanned assembly and reducing construction costs.

[0036] Balancing connection strength and structural stability: The combination of circumferential joint and longitudinal bolt connection, staggered joint splicing, and tenon and mortise joints for uniform stress distribution ensures the circumferential and longitudinal connection strength of the segments, disperses joint stress, and enhances the overall structural resistance to deformation and damage of the shaft, meeting the structural safety requirements for long-term operation and maintenance of power tunnels.

[0037] Reliable waterproof performance, eliminating potential leakage risks: The structure includes a planar longitudinal joint, a closed-loop design for the circumferential longitudinal joint sealing groove, and a tight fit at the joint, avoiding weak points in the waterproofing of multi-angle joints. The seals are compressed evenly and positioned precisely, forming a comprehensive waterproof system that effectively prevents groundwater leakage and ensures the safety of equipment inside the power tunnel.

[0038] Adaptable to engineering needs and highly scalable: The standardized design, factory prefabrication, and on-site assembly of tunnel segments are suitable for the construction needs of a large number of small-section inspection wells along power tunnels. At the same time, the structure is simple and easy to process, and can be widely promoted to small-section shield tunnel shaft projects, with significant engineering practical value and economic benefits.

[0039] The technical solution provided by this invention offers a segment structure for small-section power tunnel shafts that meets segment connection strength requirements, enables precise positioning, offers high reliability, allows for quick and easy assembly, and does not affect the waterproof performance of segment joints. This solves the problems of limited operating space, small construction working face, and inconvenient segment assembly in small-section shafts. It also addresses the issue of segment misalignment during assembly, improving segment assembly quality and enhancing operability. Therefore, this technical solution, while ensuring reliable segment connection, achieves rapid segment assembly and connection, and simplifies installation, thereby improving the efficiency of segment assembly construction, shortening the construction period, and saving construction costs. Attached Figure Description

[0040] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the assembly of the vertical shaft segment structure of a power tunnel (both ends of the segment body in the axial direction are provided with tenons and grooves).

[0042] Figure 2 for Figure 1 Schematic diagram of the exterior facade of the second central tunnel segment;

[0043] Figure 3 for Figure 2 A diagram illustrating a squint;

[0044] Figure 4 for Figure 1 Schematic diagram of the interior elevation of the first central tunnel segment;

[0045] Figure 5 for Figure 4 A diagram illustrating a squint;

[0046] Figure 6This is an oblique view of the inner facade of another embodiment of the tunnel segment (the two ends of the tunnel segment body in the axial direction are respectively provided with tenons and grooves).

[0047] Explanation of icon numbers:

[0048] 1. Segment body, 2. Circumferential joint connector, 3. Tenon, 4. Groove, 5. Circumferential joint connection hole, 6. Longitudinal joint, 7. Hand hole, 8. Circumferential joint seal installation groove, 9. Longitudinal joint end face. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0051] It should be noted that, in the description of this application, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0052] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0053] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0054] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as having idealized or highly formalized meanings, unless expressly defined herein.

[0055] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0056] A type of segment, such as Figure 2 , Figure 4 , Figure 6 As shown, the segment body 1 includes an arc-shaped tube body. The circumferential joint of the tube body 1 includes an inner axial insertion part and an outer axial mating part. The axial insertion part includes a tenon 3 and a groove 4 for interlocking between adjacent tubes, as well as an circumferential joint connector 2 and an circumferential joint connection hole 5 for interlocking. The longitudinal joint of the tube body 1 is a planar longitudinal joint end face 9 and is provided with bolt mounting holes. The hand hole 7 of the bolt connection hole 10 is located on the outer arc surface of the tube body 1.

[0057] Preferably, such as Figure 2 and Figure 4 As shown, both ends of the segment body 1 in the axial direction are provided with tenons 3 and grooves 4; or as shown in the figure. Figure 6 As shown, the two ends of the tube body 1 in the axial direction are respectively provided with tenons 3 and grooves 4.

[0058] Preferably, the circumferential joint connector 2 is located at the bottom of the groove 4, and the circumferential joint connection hole 5 is located at the end face of the tenon 3.

[0059] Preferably, the tenon 3 protrudes from the axially mating portion, and the groove 4 is recessed relative to the axially mating portion.

[0060] Preferably, an annular seal mounting groove 8 is provided between the axial insertion part and the outer axial mating part.

[0061] Preferably, the longitudinal seam is provided with longitudinal seam seal mounting grooves located on both sides of the bolt mounting hole, wherein the outer longitudinal seam seal mounting groove corresponds to the circumferential seam seal mounting groove 8.

[0062] Preferably, the tenon 3 and the groove 4 are equally divided and alternately arranged along the arc length of the tube body 1, and the lining rings can be rotated at a certain angle before assembly to meet the function of staggered assembly of tube segments.

[0063] A power tunnel shaft segment structure includes several segments as described in any of the above embodiments.

[0064] Preferably, a ring pipe section includes several alternately spliced ​​pipe segments one and two. The left and right edges of pipe segment one are grooves 4 and the grooves have no outer side walls. The left and right edges of pipe segment two are tenons 3. The longitudinal seams between adjacent pipe segments are staggered. After the adjacent pipe segments are spliced, the end face of the tenon 3 fits with the bottom of the groove 4, and the end faces of the axial mating parts fit together.

[0065] That is, tenons and grooves are set in the circumferential joints of the pipe segment structure. The tenons protrude from the end face of the circumferential joint, and the grooves are recessed into the end face of the circumferential joint, so that the end face of the circumferential joint is flat. The tenons and grooves between the lining rings adopt socket-type quick connectors to achieve the purpose of simple and quick assembly and positioning between pipe segments, preventing misalignment during assembly, and not affecting the waterproofing of the pipe segment joints.

[0066] One objective of this invention is to provide a segment structure that can meet the requirements of segment connection strength, reduce the amount of bolt tightening work, has high reliability, is quick and easy to assemble, and does not affect the waterproof performance of segment joints.

[0067] To achieve the above objectives, such as Figures 1 to 5 As shown, a preferred embodiment of the power tunnel shaft segment structure consists of the following parts:

[0068] The circumferential joint connector 2 adopts a socket structure and is combined with the circumferential joint connection hole 5 to achieve the purpose of connecting the lining ring;

[0069] The tenon 3 and the groove 4 are alternately distributed around the ring, and the design of equal division of the ring is adopted. During assembly, the tenon 3 and the groove 4 are combined in correspondence, and the ring joint connector 2 is connected to the ring joint connection hole 5 to achieve the purpose of positioning and connecting the segment lining ring.

[0070] The groove 4 and the tenon 3 are alternately distributed around the ring, and the design of equal division of the ring is adopted. During assembly, the tenon 3 and the groove 4 are matched accordingly, and the ring joint connector 2 is connected to the ring joint connection hole 5 to achieve the purpose of assembling and connecting the segment lining ring.

[0071] The circumferential joint connection hole 5 adopts a socket structure and is combined with the circumferential joint connector 2 to achieve the purpose of lining ring connection.

[0072] In the segment structure of this invention, the tenons 3 and grooves 4 are alternately and equally spaced around the entire ring. During assembly, the tenons 3 and grooves 4 are matched accordingly, and the circumferential joint connector 2 and circumferential joint connection hole 5 are quickly inserted and connected, achieving the purpose of positioning and connecting the segment lining rings. At the same time, the alternating and equally spaced tenons 3 and grooves 4 can also achieve the purpose of staggered segment assembly.

[0073] The technical solution of this invention is mainly implemented through the following technical approach:

[0074] S1. Combined with appendix Figure 1 and appendix Figure 5 Transport shaft segment 1 to the designated assembly position;

[0075] S2. Combined with appendix Figure 1 After aligning the tenon 3 in the vertical shaft segment 1 with the groove 4 in the other vertical shaft segment 1, the circumferential joint connector 2 on the groove 4 and the circumferential joint connection hole 5 on the tenon 3 are connected to each other, and the joint end face of the vertical shaft segment 1 is pressed tightly.

[0076] S3. Combined with appendix Figure 1 To avoid through seams, staggered assembly of the segments can be achieved by rotating the tenon 3 in the vertical shaft segment 1 to the corresponding position of the groove 4.

[0077] S4. Repeat steps S1, S2, and S3 to assemble the subsequent tunnel segments.

[0078] like Figures 1-5 The image shows the application method of segmented tunnel structures. For example... Figure 6 The image shows an alternative embodiment of a segment structure for a power tunnel shaft. This segment structure utilizes the principle of mechanical interlocking, with tenons 3 and grooves 4 evenly divided and alternately arranged to ensure accurate positioning of the segments during assembly, thereby quickly completing subsequent segment assembly construction.

[0079] Therefore, based on any of the above embodiments, a segment structure is provided for small-section vertical shafts that can meet the requirements for segment connection strength, provide precise positioning, high reliability, quick and easy assembly, and does not affect the waterproof performance of segment joints. This solves the problems of limited operating space, small construction working surface, and inconvenient segment assembly operations in small-section vertical shafts. It also solves the problem of segment misalignment during segment assembly, improving the quality of segment assembly. As a result, this segment structure can significantly avoid the problem of segment misalignment during vertical shaft construction, simplify operation, and significantly shorten the overall construction period. At the same time, the tenon and groove structure improves the shear resistance of the circumferential joint, significantly improves the stress characteristics of the segment, and ensures safety and reliability.

[0080] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0081] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A type of tunnel segment, characterized in that: The segment body includes an arc-shaped main body. The circumferential seam of the main body includes an inner axial insertion part and an outer axial mating part. The axial insertion part includes a tenon and a groove for interlocking between adjacent segments, as well as an circumferential seam connector and an circumferential seam connection hole for interlocking. The longitudinal seam of the main body is a planar longitudinal seam end face and is provided with bolt mounting holes. The hand hole of the bolt connection hole is located on the outer arc surface of the main body.

2. The segment according to claim 1, characterized in that: Both ends of the main body of the tube segment in the axial direction are provided with tenons and grooves.

3. The segment according to claim 1, characterized in that: The two ends of the main body of the tube segment in the axial direction are respectively provided with a tenon and a groove.

4. The segment according to any one of claims 1-3, characterized in that: The circumferential joint connector is located at the bottom of the groove, and the circumferential joint connection hole is located at the end face of the tenon.

5. The segment according to claim 4, characterized in that: The tenon protrudes from the axially mating portion, and the groove is recessed relative to the axially mating portion.

6. The segment according to any one of claims 1-3 and 5, characterized in that: A circumferential seal mounting groove is provided between the axial insertion part and the outer axial mating part.

7. The segment according to claim 6, characterized in that: The longitudinal seam is provided with longitudinal seam seal mounting grooves located on both sides of the bolt mounting hole, wherein the outer longitudinal seam seal mounting groove corresponds to the circumferential seam seal mounting groove.

8. The segment according to any one of claims 1-3, 5, and 7, characterized in that: The tenons and grooves are equally divided and alternately arranged along the arc length of the tube body.

9. A segment structure for a power tunnel shaft, characterized in that: It includes the segments as described in any one of claims 1-7.

10. The segment structure of the power tunnel shaft according to claim 8, characterized in that: A single-ring pipe section includes several alternately spliced ​​pipe segments one and two. The left and right edges of pipe segment one are grooves without outer walls, and the left and right edges of pipe segment two are tenons. The longitudinal joints between adjacent pipe segments are staggered. After the adjacent pipe segments are spliced, the end face of the tenon fits with the bottom of the groove, and the end faces of the axial mating parts fit together.

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