CN216811706U - Interlocking, shear resistant segment connection structure for originating receiving segment ring assembly - Google Patents

Abstract

The utility model discloses an interlocking and shearing-resistant segment connecting structure for a starting and receiving segment ring assembly, which comprises an embedded inner sleeve and a connecting inner core, wherein the embedded inner sleeve is embedded at the end part to be spliced of segments and is provided with a connecting groove, the connecting groove comprises a first groove body and a second groove body, the second groove body is divided into multistage clamping grooves from outside along the extension direction of the first groove body, and each stage of clamping groove is formed by a plurality of second groove bodies distributed around the center of the first groove body; 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 plugged into the connecting grooves; and the peripheries of the first core body and the second core body are respectively provided with a protruding part which is interlocked with each stage of clamping groove of the corresponding connecting groove. The utility model not only solves the problems of slab staggering, opening and uneven stress of the inner cambered surface and the outer cambered surface among the pipe pieces, but also ensures that the inner wall surface and the outer wall surface of the formed pipe piece ring are very smooth and beautiful, is not easy to rust, ensures the bearing capacity and the durability, is convenient to assemble, and cannot generate larger smoke dust, harmful gas and noise pollution.

Description

Interlocking, shear resistant segment connection structure for originating receiving segment ring assembly

Technical Field

The utility model belongs to the technical field of shield tunnel construction, and particularly relates to an interlocking and shearing-resistant type segment connecting structure for a segment ring assembly of an originating receiving segment.

Background

In recent years, with the rapid development of social economy and urbanization processes, the shield tunnel technology has become an indispensable key technology in infrastructure construction of important traffic and the like in China. In the important risk stage of shield tunneling construction such as shield launching, receiving or shallow earthing section, the assembly difficulty of the pipe sheet ring is large and the pipe sheet ring is not easy to fix due to the fact that the surrounding water and soil pressure is small, and even no water and soil pressure exists in the negative ring, the self-stability capability after the assembly is poor, and the opening and the slab staggering are easy to generate.

In the shield tunnel construction process in the past, the shield constructs the originating or receiving stage, and traditional section of jurisdiction is strengthened all to adopt the mode of the pre-buried steel sheet of welding section of jurisdiction to connect between the ring, however, through practice discovery, this kind of connected mode has following shortcoming:

1. the inner cambered surface and the outer cambered surface of the duct piece are stressed unevenly, so that local damage is easily caused, and the welding steel plate is usually arranged on the inner cambered surface of the duct piece, so that local internal force of the duct piece structure is easily increased and damaged;

2. the installation process is complex, the assembling speed of the duct pieces is influenced, and larger smoke dust, harmful gas and noise pollution can be generated;

3. the steel plate welded on the inner arc surface of the duct piece is easy to conflict with other inner structures of the duct piece, and the flatness and the attractiveness of the duct piece are influenced;

4. the welded steel plate is easy to rust in a humid environment or when water leaks from a tunnel, so that the bearing capacity and durability of the reinforced structure are affected;

5. the structure mode that connects between the ring adopts the tenon structure more, but the tenon structure can't provide vertical tension, and the unable inter-annular of control section of jurisdiction opens the volume, and the tenon contacts the back with the recess and although can change pure shearing into curved shearing and combine, though increase the inter-annular rigidity of shearing, nevertheless can cause the inter-annular section of jurisdiction to open simultaneously.

Therefore, with the increasing construction amount of the shield tunnel and the increasing diameter of the tunnel, the requirements on the assembling quality of the pipe pieces of the starting section, the receiving section and the shallow soil covering section are higher and higher, the assembling difficulty is higher and higher, and how to solve the problems of wrong connection, opening and uneven stress of the pipe pieces of the starting section, the receiving section and the shallow soil covering section of the shield tunnel becomes very important.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a brand-new interlocking and shearing-resistant segment connecting structure for the originating receiving segment ring assembly.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

an interlocking, shear-resistant segment connection structure for a starter-receiver segment-ring assembly, comprising:

the pre-buried inner sleeve is pre-buried at the end part to be spliced of the duct pieces and is provided with a connecting groove which is sunken inwards from the end surface, when the two duct pieces to be spliced are attached from the splicing end surface, the two connecting grooves are spliced to form a closed connecting cavity, the connecting groove comprises a first groove body with the gradually reduced groove diameter from outside to inside and a plurality of second groove bodies with the inwards recessed inner walls of the first groove bodies, the groove opening surface of the first groove body is flush with the splicing end surface of the duct pieces or the groove opening surface of the first groove body is positioned at the inner side of the splicing end surface of the duct pieces, the plurality of second groove bodies are divided into multi-stage clamping grooves from outside along the extending direction of the first groove bodies, each stage of clamping grooves is formed by a plurality of second groove bodies distributed around the center of the first groove bodies, and the groove diameter formed by the multi-stage clamping grooves is gradually reduced from outside to inside;

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 plugged into the connecting grooves and fill the connecting cavities; and the peripheries of the first core body and the second core body are respectively provided with a protruding part which is interlocked with each stage of clamping groove of the corresponding connecting groove.

Preferably, the first groove body is conical or frustum-shaped, each stage of clamping groove is annular, the first core body and the second core body are respectively matched with the corresponding first groove body, and the protruding portion is matched with the corresponding stage of clamping groove to form an annular shape. Adopt toper and every grade of draw-in groove to be annular design, make things convenient for machine-shaping on the one hand, on the other hand is convenient for form the interlocking, no matter all has the restriction like this in axial or radial, consequently, takes place the wrong platform, opens, and the uneven phenomenon of atress takes place between two sections of jurisdiction of avoiding the concatenation by a wide margin.

Preferably, the ratio of the diameter of the end face of the notch of the first groove body to the height of the first groove body is 1: 0.5 to 1. The tapering that forms like this, two sections of jurisdiction of realization that can be the best are the firm concatenation, also hide the protection with section of jurisdiction connection structure completely after the concatenation moreover, avoid outer hourglass, extension section of jurisdiction connection structure's life.

According to a specific implementation and preferred aspect of the utility model, the groove diameters of the multistage clamping grooves are gradually decreased in an arithmetic progression from outside to inside; the protruding parts positioned on the peripheries of the first core body and the second core body are matched with the multistage clamping grooves. Therefore, on the premise of meeting the interlocking and shearing resistance, the machining forming difficulty can be greatly reduced, and the problems of slab staggering, opening and uneven stress among the segments can be optimally solved by the formed interlocking force.

According to a further embodiment and a preferred aspect of the present invention, the second groove bodies forming each stage of the card slots are arranged obliquely from outside to inside, the obliquely extending hooking portions are formed between two adjacent stages of the card slots, the hooking grooves are formed between two adjacent protrusions, and when the first core body and the second core body are inserted into the connecting grooves, the hooking portions and the corresponding hooking grooves cooperate with each other to form an interlock. Here, get the cooperation formation interlocking of portion and hook groove through interior oblique hook, be similar to the barb, avoid opening between the section of jurisdiction, also can effectually avoid the wrong platform between the section of jurisdiction simultaneously.

Preferably, the second grooves of each stage of the clamping grooves are inclined inwards at equal angles. Is convenient for processing and forming and is also convenient for being plugged into and assembled.

Preferably, an inwardly recessed annular groove is formed at an end of each projection remote from the plug end, the annular groove and a groove formed between each adjacent two projections constituting a hook groove. The hook groove thus formed can provide an optimum interlocking force.

According to another embodiment and a preferable aspect of the present invention, when two segments to be spliced are spliced from the spliced end surface, the two connecting grooves are symmetrically arranged, and the first core body and the second core body are symmetrically arranged about the spliced portion. Therefore, the assembling can be carried out at will, the assembling pressure is greatly reduced, and the assembling efficiency is improved.

Preferably, the first core and the second core each comprise 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 and the second core are integrally formed, and the core sleeves of the first core and the second core 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. No matter how the core rod is arranged, the core rod has the function of improving the shearing rigidity of the duct piece and effectively limiting the staggered platform between the duct piece rings.

In addition, tooth grooves are formed in the periphery of the inner embedded sleeve and embedded in the center of the end portion of the duct piece, embedded ribs distributed around the center of the inner embedded sleeve are further arranged at the inner end portion of the inner embedded sleeve, the materials of the embedded ribs and the inner embedded sleeve are the same, and the embedded ribs extend along the length direction of the inner embedded sleeve. Herein, through the setting of tooth's socket, the firmness that pre-buried endotheca and section of jurisdiction are connected is strengthened, also avoids the atress to produce simultaneously and becomes flexible.

Meanwhile, when the segment connecting structure in the embodiment is used for splicing two segments, the stress on the inner cambered surfaces and the outer cambered surfaces of the segment structure can be ensured to be uniform, and the interlocking structure is positioned between the inner cambered surfaces and the outer cambered surfaces of the segments, so that the stress on the inner cambered surfaces and the outer cambered surfaces is relatively uniform.

Due to the implementation of the technical scheme, compared with the prior art, the utility model has the following advantages:

the hidden anti-shearing and interlocking connection of the duct piece connecting structure not only solves the problems of slab staggering, opening and uneven stress of the inner cambered surface and the outer cambered surface between the duct pieces, but also ensures the bearing capacity and durability because the inner hidden surface is not easy to rust, and has simple structure and convenient assembly, and can not generate larger smoke dust, harmful gas and noise pollution in the assembly process.

Drawings

FIG. 1 is a schematic view of the structure of a tube sheet ring in example 1;

FIG. 2 is a state view of the tube sheet connecting structure in FIG. 1;

FIG. 3 is an exploded view of the tube sheet connecting structure of FIG. 2;

FIG. 4 is a schematic partial cross-sectional view of FIG. 3;

FIG. 5 is a schematic view showing the structure of a tube sheet ring in example 2;

FIG. 6 is an enlarged view of the tube sheet connecting structure in FIG. 5;

FIG. 7 is a schematic front view of FIG. 6;

FIG. 8 is a schematic sectional view taken along line A-A in FIG. 7;

wherein: J. a segment connecting structure; G. a duct piece; H. a tube sheet ring; 1. pre-burying an inner sleeve; 10. a tooth socket; 11. connecting grooves; 111. a first tank body; 112. a second tank body; 2. connecting the inner core; 21. a first core; 22. a second core; x1, mandrel; x2, core sleeve; t, a protrusion; s, hook groove; s1, annular groove; s2, groove; g. a hooking part; 3. and (5) embedding the ribs.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiment in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and therefore the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediary. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Example 1

As shown in fig. 1 and 2, the interlocking, shear-resistant segment connecting structure J for a segment-ring assembly of a receiving-originating segment of this embodiment is used for splicing two segments G from the end surface in the vertical direction to the left and right, which finally forms a segment ring H.

Specifically, section of jurisdiction connection structure J includes two pre-buried endotheca 1 and the connection inner core 2 that splice joint symmetry set up from two sections of jurisdiction G.

As shown in fig. 3 and 4, the inner embedded sleeve 1 is embedded at the end of the segment G to be spliced and is integrally formed with the segment G.

In this example, tooth grooves 10 are formed on the periphery of the inner embedded sleeve 1, and the inner embedded sleeve is embedded in the center of the end portion of the duct piece G, wherein the inner end portion of the inner embedded sleeve 1 is further provided with embedded ribs 3 distributed around the center of the inner embedded sleeve 1, and here, the firmness of the connection between the inner embedded sleeve and the duct piece is enhanced through the arrangement of the tooth grooves, and meanwhile, the looseness caused by stress is also avoided.

Specifically, the embedded rib 3 is made of the same material as the embedded inner sleeve 1, and extends along the length direction of the embedded inner sleeve 1. That is to say, when two sections of jurisdiction concatenation are implemented to section of jurisdiction connection structure, can also guarantee that the intraductal cambered surface atress is even in the section of jurisdiction structure, and lies in between the intraductal cambered surface of section of jurisdiction, makes the intraductal cambered surface atress relatively even.

Meanwhile, the embedded inner sleeve 1 is provided with connecting grooves 11 which are sunken inwards from the end face, and when two pipe pieces G to be spliced are attached to the spliced end face, the two connecting grooves 11 are spliced to form a closed connecting cavity.

In this example, the connection groove 11 includes a first groove 111 whose groove diameter gradually decreases from the outside to the inside, and a plurality of second grooves 112 recessed inward from the inner wall of the first groove 111.

Specifically, the groove opening surface of the first groove body 111 is flush with the splicing end surface of the segment G. The installation is convenient, and two segments G are ensured to be spliced smoothly from the splicing end face.

The ratio of the diameter of the end face of the notch of the first groove body 111 to the height of the first groove body 111 is 1: 0.88. the tapering that forms like this, two section of jurisdiction of realization that can be the best are the firm concatenation, also hide the protection with section of jurisdiction connection structure completely after the concatenation moreover, avoid outer the hourglass, prolong section of jurisdiction connection structure's life.

Each second slot 112 is annular and is divided into multiple stages of slots from outside to inside along the extending direction of the first slot 111, and the slot diameter formed by the multiple stages of slots k is gradually reduced from outside to inside.

In this example, the groove diameters (also average groove diameters) of the multi-stage card grooves k decrease stepwise in an arithmetic progression from outside to inside. Not only can reduce the machine-shaping degree of difficulty by a wide margin, but also connect inner core 2 and the connecting groove 11 butt joint back that corresponds and form interlocking power can be the best solution between the section of jurisdiction stagger the platform, open, and the uneven problem of atress.

The connecting inner core 2 comprises 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 plugged into the connecting grooves and fill the connecting cavities; and the outer peripheries of the first core 21 and the second core 22 also have projections t that form interlocking with the respective stages of the card slots k of the coupling grooves 11, respectively.

In this example, the first core 21 and the second core 22 are symmetrically disposed and respectively matched with the corresponding first groove 111, wherein the protruding portion t is matched with the corresponding slot to form a ring shape. Adopt toper and every grade of draw-in groove to be annular design, make things convenient for machine-shaping on the one hand, on the other hand is convenient for form the interlocking, no matter all has the restriction like this in axial or radial, consequently, takes place the wrong platform, opens, and the uneven phenomenon of atress takes place between two sections of jurisdiction of avoiding the concatenation by a wide margin.

That is, the protrusions t located at the outer peripheries of the first core 21 and the second core 22 are fitted with the multiple stages of card slots. Therefore, on the premise of meeting the interlocking and shearing resistance, the machining forming difficulty can be greatly reduced, and the problems of slab staggering, opening and uneven stress among the segments can be optimally solved by the formed interlocking force.

The second groove body 112 forming each stage of the clamping groove is obliquely arranged from outside to inside, a hooking part g extending obliquely is formed between two adjacent stages of the clamping grooves, a hooking groove s is formed between two adjacent protruding parts, and when the first core body 21 and the second core body 22 are plugged into the connecting groove 11, the hooking part g and the corresponding hooking groove s are matched with each other to form interlocking. Here, get the cooperation formation interlocking of portion and hook groove through interior oblique hook, be similar to the barb, avoid opening between the section of jurisdiction, also can effectually avoid the wrong platform between the section of jurisdiction simultaneously.

The inward inclination angle of the second groove body 112 of each stage of card slots is equal. Is convenient for processing and forming and is also convenient for being plugged into and assembled.

An inwardly recessed annular groove s1 is formed at the end of each projection t remote from the plug end, and the annular groove s1 and the groove s2 formed between each adjacent two projections constitute a hook groove s. The hook groove thus formed can provide an optimum interlocking force.

Meanwhile, the two coupling grooves 11 are symmetrically disposed, and the first core body 21 and the second core body 22 are symmetrically disposed about the butt joint. Therefore, the assembling can be carried out at will, the assembling pressure is greatly reduced, and the assembling efficiency is improved.

In this example, each of the first core body 21 and the second core body 22 includes a core rod x1 and a core sleeve x2 fixed to 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 core rod x1 has the functions of improving the shearing rigidity of the duct piece and effectively limiting the dislocation of the duct piece rings, and the core sleeve x2 has the functions of being convenient to plug in the inner sleeve and forming interlocking.

Specifically, the core sleeve x2 is made of industrial plastics, is fire-resistant and corrosion-resistant, is not easy to corrode in a tunnel humid environment or when water leakage occurs, and the internal core rod x1 is made of steel, so that the bearing capacity is high.

In summary, the installation process of the tube sheet ring of the present embodiment is as follows:

the method comprises the following steps: inserting the connecting inner core 2 into the pre-buried inner sleeve 1 of a shield segment G to be assembled from the first core body 21, so that the first core body 21 is matched with the connecting groove 11, and the hooking part G and the corresponding hooking groove s form interlocking;

step two: aligning the connecting inner core 2 of the shield segment to be assembled in the first step with the pre-buried inner sleeve 1 on the assembled shield segment from the second core 22, and inserting the connecting groove 11 along the assembling direction of the shield segment, so that the second core 22 is matched with the connecting groove 11, and the hooking part g and the corresponding hooking groove s form interlocking;

step three: locking the assembled duct pieces and the assembled duct pieces by using connecting bolts;

step four: and repeating the steps in sequence until all the segments of the segment ring are assembled.

Meanwhile, in the first step and the second step, the exchange can be carried out, the connecting inner core 2 is firstly installed in the embedded inner sleeve 1 on the assembled shield segment, and then the other end of the connecting inner core 2 is aligned and assembled with the embedded inner sleeve 1 of the shield segment G to be assembled.

Example 2

As shown in fig. 5 and 6, the interlocking, shear-resistant segment connecting structure J for a segment-ring assembly of a receiving segment used in this embodiment is used for splicing two segments G from the horizontal end surface up and down, which finally forms a segment ring H.

Specifically, the structures of the embedded inner sleeve 1 and the connecting inner core 2 are basically the same as those of the embodiment 1.

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 molded.

In this embodiment, the connecting inner core 2 is made of industrial plastic, is fire-resistant and corrosion-resistant, and is not easy to be corroded in a tunnel humid environment or when water leakage occurs.

In addition, the installation process of the tube sheet ring of the present embodiment is as follows:

s1, inserting the connecting inner core into the inner embedded sleeve of the shield segment to be assembled along the length direction of the first core or inserting the connecting inner core into the inner embedded sleeve on the assembled shield segment from the first core, so that the first core is matched with the connecting groove, and the protruding part and the connecting groove are interlocked;

s2, aligning the two segments up and down, aligning the second core body with the hollow connecting grooves of the segments to be assembled and assembled, then detaching the second core body into the aligned connecting grooves along the length direction of the second core body by longitudinal acting force, and forming interlocking between the protruding parts and the connecting grooves;

s3, mounting a segment connecting bolt, wherein the connecting bolt extends along the segment mounting direction, penetrates through the segment to lock the upper segment and the lower segment, and the end part of the connecting bolt is connected with the end part of the segment in a countersunk hole mode;

and S4, repeating the steps in sequence until the assembly of all the segments of the segment ring is completed.

In summary, after the pipe piece ring assembly of the starting and receiving section is carried out by adopting the pipe piece connecting structure, the following advantages are achieved:

1. the hidden anti-shearing and interlocking connection of the segment connecting structure not only solves the problems of slab staggering, opening and uneven stress of inner and outer cambered surfaces among the segments, but also ensures that the inner and outer wall surfaces of the formed segment ring are very flat and beautiful;

2. after the pipe pieces are assembled, because the pipe pieces are hidden, the pipe pieces are not easy to rust when water leakage occurs in a humid environment or a tunnel, and the bearing capacity and the durability of the pipe piece ring are ensured;

3. the installation process is simple and efficient, meanwhile, the assembly is convenient, and welding is not needed, so that greater smoke dust, harmful gas and noise pollution can not be generated in the assembly process;

4. adjacent duct pieces among rings are connected with interlocking in an inclined manner through a pre-buried sleeve in advance to realize relative tensioning, the tensile and shear resistance of the duct pieces among the rings is effectively improved, meanwhile, a core body made of industrial plastics is adopted, the core body is convenient to be plugged into a connecting groove for assembly, the hooking part and the hooking groove are also very convenient to be matched to form interlocking, particularly, a groove formed between an annular groove and every two adjacent protruding parts is adopted to form the hooking groove, the formed hooking groove can provide the optimal interlocking force, and finally, the part of the core body forming the interlocking is made of the industrial plastics, so that the design allowable value of the deformation among the rings of the duct piece structure can be ensured;

5. after the splicing of the two duct pieces is implemented by the duct piece connecting structure, the stress on the inner cambered surface and the outer cambered surface of the duct piece structure can be ensured to be uniform, and the interlocking structure is positioned between the inner cambered surface and the outer cambered surface of the duct piece, so that the stress on the inner cambered surface and the outer cambered surface is relatively uniform;

6. on the premise of meeting the interlocking and shearing resistance, the matching design of the core body and the connecting groove not only can greatly reduce the processing and forming difficulty, but also can optimally solve the problems of slab staggering, opening and uneven stress among the pipe pieces due to the formed interlocking force;

7. through the setting of pre-buried endotheca periphery tooth's socket, the firmness that pre-buried endotheca and section of jurisdiction are connected is strengthened, also avoids the atress to produce simultaneously and becomes flexible.

The present invention has been described in detail in order to enable those skilled in the art to understand the utility model and to practice it, and it is not intended to limit the scope of the utility model, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the present invention.

Claims (10)

1. An interlocking, shear resistant segment connection structure for a segment-to-segment ring assembly of a launch-receiving segment, comprising: the segment connecting structure includes:

the pre-buried inner sleeve is pre-buried at the end part to be spliced of the pipe pieces and is provided with connecting grooves which are inwards recessed from the end surface, when two pipe pieces to be spliced are attached from the splicing end surface, the two connecting grooves are spliced to form a closed connecting cavity, the connecting grooves comprise a first groove body with the groove diameter gradually reduced from outside to inside and a plurality of second groove bodies with the groove diameter inwards recessed from the inner wall of the first groove body, the groove opening surface of the first groove body is flush with the splicing end surface of the pipe pieces or the groove opening surface of the first groove body is positioned at the inner side of the splicing end surface of the pipe pieces, the second groove bodies are divided into multistage clamping grooves from outside along the extending direction of the first groove body, each stage of clamping grooves is formed by the second groove bodies distributed around the center of the first groove body, and the groove diameter formed by the multistage clamping grooves is gradually reduced from outside to inside;

a connecting inner core including 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 grooves and fill the connecting cavities; and the peripheries of the first core body and the second core body are respectively provided with a protruding part which is interlocked with the clamping groove of each stage of the corresponding connecting groove.

2. The interlocking, shear-resistant segment connection structure for a segment-to-segment ring assembly of claim 1, wherein: first cell body is toper or frustum shape, every level the draw-in groove is the annular, first core and second core respectively with correspond first cell body matches, just the protruding with correspond the level the draw-in groove matches and is the annular.

3. The interlocking, shear-resistant segment connection structure for a segment-to-segment ring assembly of claim 2, wherein: the ratio of the diameter of the end face of the notch of the first groove body to the height of the first groove body is 1: 0.5 to 1.

4. The interlocking, shear resistant segment connection structure for a originating receiving segment tube segment ring assembly of claim 2, wherein: the groove diameters of the multistage clamping grooves are gradually decreased in an arithmetic progression manner from outside to inside; and the protruding parts positioned on the peripheries of the first core body and the second core body are matched with the clamping grooves in multiple stages.

5. The interlocking, shear-resistant segment connection structure for a segment-to-segment ring assembly of claim 4, wherein: constitute every grade the draw-in groove the second cell body is from outside to inside slope setting, adjacent two-stage form the hook portion of getting that the slope extends between the draw-in groove, adjacent two form the hook groove between the protruding portion, first core and second core are filled in during the spread groove, the hook portion of getting with corresponding the hook groove is mutually supported and is formed the interlocking.

6. The interlocking, shear-resistant segment connection structure for a segment-to-segment ring assembly of claim 5, wherein: the inward inclined angles of the second groove bodies of the clamping grooves in each stage are equal.

7. The interlocking, shear-resistant segment connection structure for a segment-to-segment ring assembly of claim 5, wherein: an inward-sunken annular groove is formed at the end part of each protruding part far away from the plugging end, and the annular groove and the groove formed between every two adjacent protruding parts form the hook groove.

8. The interlocking, shear-resistant segment connection structure for a segment-to-segment ring assembly of any one of claims 1 to 7, wherein: two treat that the concatenation section of jurisdiction is from when the laminating of concatenation terminal surface, two the spread groove symmetry sets up, first core with the second core sets up about butt joint department symmetry.

9. The interlocking, shear-resistant segment connection structure for a segment-to-segment ring assembly of claim 8, wherein: the first core and the second core respectively comprise a core rod and a core sleeve which is fixed on the core rod and is provided with the protruding part, wherein the core rod of the first core and the core rod of the second core are integrally formed, and the core sleeve of the first core and the core sleeve of the second core 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.

10. The interlocking, shear-resistant segment connection structure for a segment-to-segment ring assembly of claim 1, wherein: tooth grooves are formed in the periphery of the embedded inner sleeve and embedded in the center of the end portion of the segment, embedded ribs distributed around the center of the embedded inner sleeve are further arranged at the inner end portion of the embedded inner sleeve, the embedded ribs and the embedded inner sleeve are made of the same material and extend along the length direction of the embedded inner sleeve.

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