Interlocking, shear-resistant segment connection structure for segment ring assembly in the originating and receiving sections

Abstract

The present invention discloses an interlocking, shear-resistant segment connection structure for the assembly of the segment ring of the originating and receiving section, which includes a pre-embedded inner sleeve and a connecting inner core, wherein the pre-embedded inner sleeve is pre-embedded at the end of the segment to be spliced ​​and has a connecting groove, wherein the connecting groove includes a first and a second groove body, wherein the second groove body is divided into multiple levels of slots from the outside along the extension direction of the first groove body, and each level of slots is composed of a plurality of second groove bodies distributed around the center of the first groove body; the connecting inner core includes a first and a second core body, wherein the first and the second core bodies are respectively inserted into the connecting groove; and the outer periphery of the first and the second core bodies also respectively has a protrusion that interlocks with each level of slots of the corresponding connecting groove. The present invention not only solves the problems of misalignment, opening, and uneven force on the inner and outer arc surfaces between the segments, but also the inner and outer wall surfaces of the segment ring formed are very flat and beautiful, and are not easy to rust, thus ensuring the bearing capacity and durability. In addition, the assembly is convenient, and no large smoke, harmful gas, or noise pollution is generated.

Description

Technical Field

[0001] The invention belongs to the technical field of shield tunnel construction, and in particular relates to an interlocking and shear-resistant segment connection structure used for segment ring assembly of an originating and receiving section. Background Art

[0002] In recent years, with the rapid development of social economy and urbanization, shield tunnel technology has become an indispensable key technology in the construction of major transportation and other infrastructure in my country. In the important risk stages of shield tunneling construction, such as the shield starting, receiving or shallow overburden section, the surrounding water and soil pressure is small, and there is even no water and soil pressure at the negative ring, which makes it difficult to assemble the segment rings, difficult to fix, and the self-stabilizing ability after assembly is poor, which is easy to cause opening and misalignment.

[0003] In the previous shield tunnel construction process, at the shield starting or receiving stage, the traditional segment ring reinforcement was connected by welding the segment pre-embedded steel plates. However, it has been found in practice that this connection method has the following disadvantages:

[0004] 1. The internal and external curved surfaces of the segments are subjected to uneven forces, which can easily cause local damage. The welded steel plates are usually located on the internal curved surfaces of the segments, which can easily lead to increased internal forces and damage to the local segments.

[0005] 2. The installation process is complicated, which affects the assembly speed of the pipe segments and produces large amounts of smoke, harmful gases and noise pollution;

[0006] 3. The curved steel plate welded inside the segment is prone to conflict with other internal structures of the segment and affect the flatness and aesthetics of the segment;

[0007] 4. Welded steel plates are prone to rust in humid environments or when water leaks into tunnels, which affects the bearing capacity and durability of the reinforced structure;

[0008] 5. The construction method of the joints between the rings mostly adopts the mortise and tenon structure, but the mortise and tenon structure cannot provide longitudinal tension and cannot control the amount of opening between the ring segments. Moreover, although the contact between the mortise and the groove can transform the pure shear into a combination of bending and shear, and increase the shear stiffness between the rings, it will also cause the ring segments to open.

[0009] Therefore, with the increasing amount of shield tunnel construction and the increasing diameter of tunnels, the assembly quality requirements for the starting, receiving and shallow cover segments are becoming increasingly higher, and the difficulty of assembly is becoming increasingly greater. It will become very important to solve the problems of misalignment, opening and uneven force of the shield starting, receiving and shallow cover segments. Summary of the invention

[0010] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a new interlocking and shear-resistant segment connection structure for assembling segment rings of the originating and receiving sections.

[0011] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0012] An interlocking, shear-resistant segment connection structure for assembling segment rings of an originating and receiving section, comprising:

[0013] The embedded inner sleeve is embedded in the end of the pipe segment to be spliced, and has a connection groove that is recessed inward from the end surface, wherein when two pipe segments to be spliced ​​are fitted from the splicing end surfaces, the two connection grooves are spliced ​​to form a closed connection cavity, and the connection groove includes a first groove body whose groove diameter gradually decreases from the outside to the inside, and a plurality of second groove bodies that are recessed inward from the inner wall of the first groove body, the groove surface of the first groove body is flush with the splicing end surface of the pipe segment or the groove surface of the first groove body is located on the inner side of the splicing end surface of the pipe segment, and the plurality of second groove bodies are divided into multiple levels of slots from the outside along the extension direction of the first groove body, each level of the slot is composed of a plurality of second groove bodies distributed around the center of the first groove body, and the groove diameter formed by the multiple levels of slots gradually decreases from the outside to the inside;

[0014] The connecting inner core comprises a first core body and a second core body, wherein the first core body and the second core body are respectively inserted into the connecting groove and fill the connecting cavity; and the outer peripheries of the first core body and the second core body also respectively have protrusions that interlock with each level of the corresponding connecting groove.

[0015] Preferably, the first slot body is conical or frustum-shaped, each level of the slot is annular, the first core body and the second core body are matched with the corresponding first slot body, and the protrusion is matched with the corresponding level of the slot to form an annular shape. The design of a cone and an annular slot at each level is convenient for processing and forming on the one hand, and easy to form interlocking on the other hand, so that there are restrictions in both the axial and radial directions, thereby greatly avoiding the occurrence of misalignment, opening, and uneven force between the two spliced ​​segments.

[0016] Preferably, the ratio of the diameter of the notch end surface of the first trough body to the height of the first trough body is 1:0.5~1. The taper formed in this way can best achieve the most secure splicing of the two segments, and after splicing, the segment connection structure is completely hidden and protected to avoid leakage, thereby extending the service life of the segment connection structure.

[0017] According to a specific implementation and preferred aspect of the present invention, the groove diameter of the multi-stage slot decreases step by step from the outside to the inside in an arithmetic progression; the protrusions located at the periphery of the first core and the second core match the multi-stage slot. In this way, under the premise of meeting the interlocking and shearing resistance requirements, the difficulty of processing and forming can be greatly reduced, and the interlocking force formed can best solve the problems of misalignment, opening, and uneven force between the segments.

[0018] According to another specific implementation and preferred aspect of the present invention, the second slot body constituting each level of the slot is inclined from outside to inside, an inclined hook portion is formed between two adjacent levels of the slot, a hook groove is formed between two adjacent protrusions, and when the first core body and the second core body are inserted into the connecting groove, the hook portion and the corresponding hook groove cooperate with each other to form an interlock. Here, the interlock is formed by the cooperation of the inwardly inclined hook portion and the hook groove, which is similar to a barb, avoiding the opening between the segments, and can also effectively avoid the misalignment between the segments.

[0019] Preferably, the second slot body of each level of the slot is inclined inward at the same angle, which is convenient for processing and molding, and also convenient for insertion and assembly.

[0020] Preferably, an inwardly recessed annular groove is formed at the end of each protrusion away from the insertion end, and the annular groove and the groove formed between each two adjacent protrusions constitute a hook groove. The hook groove formed in this way can provide an optimal interlocking force.

[0021] According to another specific implementation and preferred aspect of the present invention, when two pipe pieces to be spliced ​​are fitted from the splicing end faces, the two connection grooves are symmetrically arranged, and the first core body and the second core body are symmetrically arranged about the butt joint. In this way, they can be assembled arbitrarily, greatly reducing assembly pressure and improving assembly efficiency.

[0022] Preferably, the first core body and the second core body both include a core rod and a core sleeve fixed on the core rod and formed with a protrusion, wherein the core rods of the first core body and the second core body are integrally formed, and the core sleeves of the first core body and the second core body are integrally formed; or the core rod and the core sleeve are made of the same material, and the first core body and the second core body are integrally formed. Here, no matter how it is set, the function of the core rod is to improve the shear stiffness of the pipe segment and effectively limit the misalignment between pipe segment rings.

[0023] In addition, the outer periphery of the embedded inner sleeve is formed with a tooth groove, and is embedded in the center of the end of the segment, wherein the inner end of the embedded inner sleeve is also provided with embedded ribs distributed around the center of the embedded inner sleeve, and the embedded ribs are made of the same material as the embedded inner sleeve and extend along the length direction of the embedded inner sleeve. Here, the provision of the tooth groove enhances the firmness of the connection between the embedded inner sleeve and the segment, and also prevents looseness caused by force.

[0024] At the same time, when the segment connection structure in this example implements the splicing of two segments, it can also ensure that the inner and outer curved surfaces of the segment structure are evenly stressed, and the interlocking structure is located between the inner and outer curved surfaces of the segment, so that the inner and outer curved surfaces are relatively evenly stressed.

[0025] Due to the implementation of the above technical solution, the present invention has the following advantages compared with the prior art:

[0026] The concealed anti-shear and interlocking connection of the segment connection structure of the present invention not only solves the problems of misalignment, opening, and uneven force on the inner and outer curved surfaces between the segments, but also forms a segment ring with very smooth inner and outer walls, which is not easily corroded because of the internal structure, thus ensuring the bearing capacity and durability. In addition, the structure is simple, the assembly is convenient, and no large smoke, harmful gases or noise pollution will be generated during the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of the segment ring in Example 1;

[0028] Figure 2 for Figure 1 The usage status diagram of the middle segment connection structure;

[0029] Figure 3 for Figure 2 Structural decomposition intent of the middle segment connection structure;

[0030] Figure 4 for Figure 3 A partial cross-sectional schematic diagram of

[0031] Figure 5 is a schematic diagram of the structure of the segment ring in Example 2;

[0032] Figure 6 for Figure 5 An enlarged schematic diagram of the structure of the middle segment connection structure;

[0033] Figure 7 for Figure 6 A schematic diagram of the main view;

[0034] Figure 8 for Figure 7 AA section view;

[0035] Among them: J, segment connection structure; G, segment; H, segment ring; 1, embedded inner sleeve; 10, tooth groove; 11, connecting groove; 111, first groove body; 112, second groove body; 2, connecting inner core; 21, first core body; 22, second core body; x1, core rod; x2, core sleeve; t, protrusion; s, hook groove; s1, annular groove; s2, groove; g, hooking part; 3, embedded reinforcement. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0042] Example 1

[0043] like Figure 1 and Figure 2 As shown, the interlocking, shear-resistant segment connection structure J for the segment ring assembly of the originating and receiving sections of this embodiment is used for left-right splicing of two segments G from the end faces in the vertical direction, which ultimately forms a segment ring H.

[0044] Specifically, the pipe segment connection structure J includes two pre-embedded inner sleeves 1 and a connection inner core 2 symmetrically arranged from the joint seams of two pipe segments G.

[0045] Combination Figure 3 and Figure 4 As shown, the embedded inner sleeve 1 is embedded in the end of the pipe segment G to be spliced, and is integrally formed with the pipe segment G.

[0046] In this example, a tooth groove 10 is formed on the outer periphery of the embedded inner sleeve 1, and is embedded in the center of the end of the segment G, wherein the inner end of the embedded inner sleeve 1 is also provided with embedded ribs 3 distributed around the center of the embedded inner sleeve 1. Here, the connection between the embedded inner sleeve and the segment is strengthened through the provision of the tooth groove, while also avoiding looseness due to stress.

[0047] Specifically, the embedded ribs 3 are made of the same material as the embedded inner sleeve 1 and extend along the length direction of the embedded inner sleeve 1. In other words, when the segment connection structure is implemented by splicing two segments, it can also ensure that the inner and outer curved surfaces of the segment structure are evenly stressed, and are located between the inner and outer curved surfaces of the segment, so that the inner and outer curved surfaces are relatively evenly stressed.

[0048] At the same time, the embedded inner sleeve 1 has a connection groove 11 which is recessed inward from the end surface, wherein when two pipe pieces G to be spliced ​​are fitted from the splicing end surfaces, the two connection grooves 11 are spliced ​​to form a closed connection cavity.

[0049] In this example, the connecting groove 11 includes a first groove body 111 whose groove diameter gradually decreases from the outside to the inside, and a plurality of second groove bodies 112 that are recessed inward from the inner wall of the first groove body 111 .

[0050] Specifically, the notch surface of the first slot body 111 is flush with the splicing end surface of the pipe segment G, which is convenient for installation and ensures that the two pipe segments G are spliced ​​smoothly from the splicing end surface.

[0051] The ratio of the diameter of the notch end surface of the first slot body 111 to the height of the first slot body 111 is 1:0.88. The taper formed in this way can best achieve the most secure splicing of the two segments, and after splicing, the segment connection structure is completely hidden and protected to avoid leakage, thereby extending the service life of the segment connection structure.

[0052] Each second slot body 112 is annular and is divided into multiple slots from outside along the extension direction of the first slot body 111 , and the slot diameter formed by the multiple slots k gradually decreases from outside to inside.

[0053] In this example, the groove diameter (also the average groove diameter) of the multi-stage slot k decreases step by step from the outside to the inside in an arithmetic progression. This can not only greatly reduce the difficulty of processing and forming, but also the interlocking force formed after the connecting inner core 2 and the corresponding connecting groove 11 are connected can best solve the problems of misalignment, opening, and uneven force between the pipe segments.

[0054] The connecting inner core 2 includes a first core body 21 and a second core body 22, wherein the first core body 21 and the second core body 22 are respectively inserted into the connecting groove and fill the connecting cavity; and the outer periphery of the first core body 21 and the second core body 22 also respectively have a protrusion t that interlocks with each level of the corresponding connecting groove 11.

[0055] In this example, the first core 21 and the second core 22 are symmetrically arranged and matched with the corresponding first slot 111, respectively, wherein the protrusion t matches with the corresponding level of the slot in an annular shape. The design of a conical and annular slot at each level is convenient for processing and forming on the one hand, and for forming an interlock on the other hand, so that there are restrictions in both the axial and radial directions, thus greatly avoiding the occurrence of misalignment, opening, and uneven force between the two spliced ​​segments.

[0056] That is to say, the protrusions t located on the outer periphery of the first core 21 and the second core 22 match the multi-stage slots. In this way, the difficulty of processing and forming can be greatly reduced under the premise of meeting the interlocking and shearing resistance requirements, and the interlocking force formed can best solve the problems of misalignment, opening, and uneven force between the segments.

[0057] The second slot body 112 constituting each level of the slot is inclined from outside to inside, and an inclined hooking portion g is formed between two adjacent levels of the slot, and a hooking groove s is formed between two adjacent protrusions. When the first core body 21 and the second core body 22 are inserted into the connecting slot 11, the hooking portion g and the corresponding hooking groove s cooperate with each other to form an interlock. Here, the interlocking is formed by the cooperation of the inwardly inclined hooking portion and the hooking groove, which is similar to a barb, to avoid the opening between the segments, and at the same time, it can also effectively avoid the misalignment between the segments.

[0058] The second slot body 112 of each level of the slot is inclined inward at the same angle, which is convenient for processing and molding, and also convenient for plugging and assembling.

[0059] An inwardly recessed annular groove s1 is formed at the end of each protrusion t away from the insertion end, and the annular groove s1 and the groove s2 formed between each two adjacent protrusions constitute a hook groove s. The hook groove formed in this way can provide an optimal interlocking force.

[0060] At the same time, the two connecting grooves 11 are symmetrically arranged, and the first core body 21 and the second core body 22 are symmetrically arranged about the joint. In this way, it can be assembled arbitrarily, greatly reducing the assembly pressure and improving the assembly efficiency.

[0061] In this example, the first core body 21 and the second core body 22 both include a core rod x1 and a core sleeve x2 fixed on the core rod x1 and formed with a protrusion t, wherein the core rod x1 of the first core body 21 and the second core body 22 are integrally formed, and the core sleeve x2 of the first core body 21 and the second core body 22 are integrally formed. The function of the core rod x1 is to improve the shear stiffness of the segment and effectively limit the misalignment between the segment rings, and the function of the core sleeve x2 is to facilitate insertion into the inner sleeve and to form an interlocking.

[0062] Specifically, the core sleeve x2 is made of industrial plastic, which is fire-resistant and corrosion-resistant, and is not prone to rust in a humid tunnel environment or when water leakage occurs. The internal core rod x1 is made of steel and has a high bearing capacity.

[0063] In summary, the installation process of the segment ring in this embodiment is as follows:

[0064] Step 1: insert the connecting inner core 2 from the first core body 21 into the embedded inner sleeve 1 of a shield segment G to be assembled, so that the first core body 21 cooperates with the connecting groove 11, and the hooking portion g and the corresponding hooking groove s form an interlocking;

[0065] Step 2: Align the connecting inner core 2 of the shield segment to be assembled in step 1 from the second core body 22 to the embedded inner sleeve 1 on the assembled shield segment, and insert it into the connecting groove 11 along the splicing direction of the shield segment, so that the second core body 22 cooperates with the connecting groove 11, and the hooking portion g and the corresponding hooking groove s form an interlocking;

[0066] Step 3: Use connecting bolts to lock the assembled segments with the already assembled segments;

[0067] Step 4: Repeat the above steps in sequence until all the segments of the segment ring are assembled.

[0068] At the same time, in the above steps one and two, they can be interchanged. First, the connecting core 2 is installed in the embedded inner sleeve 1 on the assembled shield segment, and then the other end of the connecting core 2 is aligned and assembled with the embedded inner sleeve 1 of the shield segment G to be assembled.

[0069] Example 2

[0070] like Figure 5 and Figure 6 As shown, the interlocking, shear-resistant segment connection structure J used for the segment ring assembly of the originating and receiving sections adopted in this embodiment is used to splice two segments G from the horizontal end faces up and down, which finally forms a segment ring H.

[0071] Specifically, the structures of the embedded inner sleeve 1 and the connecting inner core 2 are substantially the same as those in Embodiment 1.

[0072] The difference is that, in this example, the core rod x1 and the core sleeve x2 connecting the first core body 21 and the second core body 22 of the inner core 2 are made of the same material, and the first core body 21 and the second core body 22 are integrally formed.

[0073] In this example, the material of the connecting inner core 2 is industrial plastic, which is fire-resistant and corrosion-resistant, and is not prone to rust in the humid environment of the tunnel or when water leakage occurs.

[0074] In addition, the installation process of the segment ring of this embodiment is as follows:

[0075] S1, inserting the assembled inner core from the first core body along its own length direction into the embedded inner sleeve of the shield segment to be assembled, or inserting the assembled inner core from the first core body into the embedded inner sleeve of the assembled shield segment, so that the first core body cooperates with the connecting groove, and the protrusion and the connecting groove are interlocked;

[0076] S2, aligning the two segments up and down, aligning the second core with the hollow connection grooves of the segments to be assembled and assembled, and then using longitudinal force to disassemble the second core into the aligned connection grooves along its own length direction, and forming an interlock between the protrusion and the connection groove;

[0077] S3, installing the segment connection bolts, wherein the connection bolts extend along the segment installation direction and penetrate through the inside of the segment to lock the upper and lower segments, and at the same time, the ends of the connection bolts are connected to the ends of the segment by means of countersunk holes;

[0078] S4. Repeat the above steps in sequence until all the segments of the segment ring are assembled.

[0079] In summary, the segment connection structure involved in this application has the following advantages after the segment ring assembly of the originating and receiving section is adopted:

[0080] 1. The concealed anti-shear and interlocking connection of the segment connection structure not only solves the problems of misalignment, opening, and uneven force on the inner and outer curved surfaces between the segments, but also forms a very smooth and beautiful inner and outer wall surface of the segment ring;

[0081] 2. After the segments are assembled, they are hidden inside, so they are not easy to rust in a humid environment or when water leaks in the tunnel, ensuring the bearing capacity and durability of the segment ring;

[0082] 3. The installation process is simple and efficient. At the same time, it is easy to assemble and does not require welding. Therefore, no large amount of smoke, harmful gases or noise pollution will be generated during the assembly process;

[0083] 4. The adjacent segments between the rings are relatively tightened by pre-embedded sleeves and interlocking connection inner bevels, which effectively improves the tensile and shear resistance of the segments between the rings. At the same time, the core body made of industrial plastic is not only convenient for the assembly of the core body into the connection groove, but also very convenient for the cooperation between the hook part and the hook groove to form interlocking, especially the use of annular grooves and grooves formed between each two adjacent protrusions to form hook grooves. The hook groove formed in this way can provide the best interlocking force. Finally, the interlocking part of the core body is industrial plastic, so the design allowable value of the deformation between the rings of the segment structure can be guaranteed;

[0084] 5. After the two segments are spliced ​​together, the segment connection structure can ensure that the inner and outer curved surfaces of the segment structure are evenly stressed, and the interlocking structure is located between the inner and outer curved surfaces of the segment, so that the inner and outer curved surfaces are relatively evenly stressed;

[0085] 6. Under the premise of meeting the requirements of interlocking and anti-shearing, the coordinated design of the core and the connection groove can not only greatly reduce the difficulty of processing and forming, but also the interlocking force formed can best solve the problems of misalignment, opening, and uneven force between the segments;

[0086] 7. By setting the outer peripheral grooves of the embedded inner sleeve, the firmness of the connection between the embedded inner sleeve and the pipe segment is enhanced, and loosening caused by stress is also avoided.

[0087] The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them. It does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An interlocking, shear-resistant segment connection structure for the assembly of the segment rings of the originating and receiving sections, characterized in that: The segment connection structure includes: The embedded inner sleeve is embedded in the end of the pipe segment to be spliced ​​and is formed integrally with the pipe segment, and the embedded inner sleeve has a connecting groove recessed inward from the end surface, wherein when the two pipe segments to be spliced ​​fit together from the splicing end surfaces, the two connecting grooves are spliced ​​to form a closed connecting cavity, and the connecting groove includes a first groove body whose groove diameter gradually decreases from the outside to the inside, and a plurality of second groove bodies recessed inward from the inner wall of the first groove body, the groove surface of the first groove body is flush with the splicing end surface of the pipe segment or the groove surface of the first groove body is located on the inner side of the splicing end surface of the pipe segment, and the plurality of second groove bodies are divided into a plurality of slots from the outside along the extension direction of the first groove body, each slot is composed of a plurality of second groove bodies distributed around the center of the first groove body, and the slot diameter formed by the plurality of slots gradually decreases from the outside to the inside; the first groove body is conical or frustum-shaped; the second groove body constituting each slot is inclined from the outside to the inside, an inclined extending hooking portion is formed between two adjacent slots, and a hook groove is formed between two adjacent protrusions; The connecting inner core comprises a first core body and a second core body, wherein the first core body and the second core body are respectively inserted into the connecting groove and fill the connecting cavity; and the outer peripheries of the first core body and the second core body also respectively have protrusions that interlock with the corresponding card slots of each level of the connecting groove, wherein each level of the card slot is annular, the first core body and the second core body are respectively matched with the corresponding first groove body, and the protrusions are matched with the card slots of the corresponding level to be annular, and at the same time the hooking part and the corresponding hooking groove cooperate with each other to form an interlock, the first core body and the second core body both comprise a core rod, a core sleeve fixed on the core rod and formed with the protrusions, wherein the core rod and the core sleeve are made of the same material, and the first core body and the second core body are integrally formed.

2. The interlocking, shear-resistant segment connection structure for the segment ring assembly of the originating and receiving sections according to claim 1 is characterized in that: The ratio of the diameter of the notch end surface of the first slot body to the height of the first slot body is 1:0.5~1.

3. The interlocking, shear-resistant segment connection structure for the segment ring assembly of the originating and receiving sections according to claim 1 is characterized in that: The groove diameters of the multi-level card grooves decrease step by step from the outside to the inside in an arithmetic progression.

4. The interlocking, shear-resistant segment connection structure for the segment ring assembly of the originating and receiving section according to claim 3 is characterized in that: The protrusions located at the peripheries of the first core and the second core are matched with the multiple-stage card slots.

5. The interlocking, shear-resistant segment connection structure for the segment ring assembly of the originating and receiving sections according to claim 1, characterized in that: The inward inclination angle of the second slot body of each level of the slot is equal.

6. The interlocking, shear-resistant segment connection structure for the segment ring assembly of the originating and receiving sections according to claim 1, characterized in that: An inwardly recessed annular groove is formed at the end of each protrusion away from the insertion end, and the annular groove and the groove formed between each two adjacent protrusions constitute the hook groove.

7. The interlocking, shear-resistant segment connection structure for the segment ring assembly of the originating and receiving sections according to any one of claims 1 to 6, characterized in that: When two pipe pieces to be spliced ​​are fitted together from the splicing end faces, the two connection grooves are symmetrically arranged, and the first core body and the second core body are symmetrically arranged about the butt joint.

8. The interlocking, shear-resistant segment connection structure for the segment ring assembly of the originating and receiving section according to claim 1, characterized in that: The outer periphery of the embedded inner sleeve is formed with teeth and is embedded in the center of the end of the pipe segment, wherein the inner end of the embedded inner sleeve is also provided with embedded ribs distributed around the center of the embedded inner sleeve, the embedded ribs are made of the same material as the embedded inner sleeve and extend along the length direction of the embedded inner sleeve.

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