A shield segment

Abstract

The present application discloses a shield segment, which relates to the field of tunnel engineering and includes: a segment outer shell body, the segment outer shell body is configured to be arc-shaped; spiral rib strips, the spiral rib strips are arranged in the internal space of the segment outer shell body, and the spiral rib strips extend in the circumferential direction of the segment outer shell body, the spiral rib strips are configured in multiple numbers and the multiple spiral rib strips are spaced apart in the axial direction of the segment outer shell body; concrete, the concrete is filled in the internal space of the segment outer shell body to cover at least part of the spiral rib strips. The bearing capacity of the shield segment of the present application is not only improved, but also the thickness of the shield segment is reduced, thereby improving the material utilization rate, reducing the production cost, and reducing the excavation amount of the tunnel during the construction process.

Description

Technical Field

[0001] This application relates to the field of tunnel engineering, and in particular, to a shield segment. Background Art

[0002] Shield segments are the main assembled components in shield construction. They are the innermost barriers of the tunnel, bearing the functions of resisting soil pressure, groundwater pressure, and some special loads. Shield segments are the permanent lining structures of shield tunnels. The quality of shield segments is directly related to the overall quality and safety of the tunnel, affecting the waterproof performance and durability of the tunnel.

[0003] With the large-scale application of the shield method, shield tunnels have developed from shallow-buried conditions to deep-buried conditions. Traditional shield segments are large in volume, low in bearing capacity, high in material consumption, and prone to damage during installation and transportation. They cannot well adapt to the trend of rapid growth and increasing burial depth of tunnels, which does not conform to the current concept of green construction. There is an urgent need for a new type of segment structure with high material utilization rate and good bearing capacity performance to replace the traditional segment structure. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this reason, one objective of this application is to provide a shield segment. The bearing capacity of the shield segment of this application is not only improved, but also the thickness of the shield segment is reduced, thereby improving the material utilization rate, reducing the production cost, and reducing the excavation volume of the tunnel during the construction process.

[0005] A shield segment according to an embodiment of this application at least includes: a segment outer shell, the segment outer shell is configured as an arc; spiral rib bars, the spiral rib bars are arranged in the internal space of the segment outer shell, and the spiral rib bars extend in the circumferential direction of the segment outer shell, the spiral rib bars are configured as multiple and the multiple spiral rib bars are spaced apart in the axial direction of the segment outer shell; concrete, the concrete is filled in the internal space of the segment outer shell to cover at least part of the spiral rib bars.

[0006] For the shield segment according to this application, by embedding the spiral rib bars in the concrete in the segment outer shell, the spiral rib bars restrain the concrete in the segment outer shell, so that the internal strength of the shield segment is improved in multiple directions, thereby improving the bearing capacity of the shield segment. Therefore, when designing the shield segment, on the premise of meeting the bearing capacity requirements, the thickness of the segment can be correspondingly reduced, achieving the effects of reducing material usage, improving the material utilization rate, and reducing the production cost; in addition, by reducing the thickness of the shield segment, the excavation volume of the tunnel during the construction process can also be reduced, improving the construction efficiency.

[0007] A segment of a shield tunnel lining according to an embodiment of the present application, the outer shell of the segment includes: an outer shell body and a partition disposed within the outer shell body, the partition being adapted to divide the space within the outer shell body into a plurality of sub-chambers, each of the sub-chambers extending circumferentially along the outer shell of the segment.

[0008] Further, the partitions are configured as a plurality, and the plurality of partitions are spaced apart axially along the outer shell of the segment.

[0009] By providing partitions within the outer shell of the segment, the partitions provide support to the entire outer shell of the segment, enhancing the stiffness of the outer shell of the segment and reducing the likelihood of buckling of the outer shell of the segment before the concrete breaks.

[0010] Further, at least some of the plurality of sub-chambers are provided with the spiral rib bars.

[0011] Through the above technical solution, when designing the segment of the shield tunnel lining, according to the requirements of the design bearing capacity, at least some of the sub-chambers are internally provided with spiral rib bars, reducing the production cost of the segment of the shield tunnel lining.

[0012] Further, the cross-section of the sub-chamber is configured as a rectangle.

[0013] Further, the concrete includes: core concrete flowing into the space defined by the spiral rib bars and sandwich concrete flowing into the space between the spiral rib bars and the outer shell of the segment.

[0014] Through the rectangular design, the spiral rib bars are buried in the middle position of the sub-chamber, making the thickness of the sandwich concrete between the spiral rib bars and the outer shell of the segment relatively more uniform, thereby improving the restraint effect of the outer shell of the segment on the sandwich concrete.

[0015] Further, according to a further example of the present application, the segment of the shield tunnel lining further includes: a circular rib bar, the circular rib bar is disposed within the internal space of the outer shell of the segment, the circular rib bar extends circumferentially along the outer shell of the segment and is adjacent to the spiral rib bar.

[0016] Through the above technical solution, the circular rib bar is buried in the concrete to provide circumferential bearing capacity for the segment of the shield tunnel lining, improving the bearing capacity of the segment of the shield tunnel lining.

[0017] Further, the circular rib bar is disposed inside or outside the space defined by the spiral rib bar, and the circular rib bar is fixedly connected to the spiral rib bar.

[0018] Further, the circular rib bars are configured as a plurality and the plurality of circular rib bars are spaced apart circumferentially along the spiral rib bar.

[0019] Through the above technical solution, fixedly connecting the annular rib and the spiral rib can, on the one hand, control the extension length of each spiral part, and on the other hand, facilitate the staff to position the spiral rib before pouring concrete through the annular rib.

[0020] Further, uncast concrete vacancy parts are provided at both ends of the sub-chamber in the circumferential direction of the segment outer shell, and both ends of the spiral rib in the circumferential direction of the segment outer shell extend into the corresponding vacancy parts.

[0021] Through the above technical solution, when two adjacent shield segments in the circumferential direction are connected by bolts, concrete can be poured again into the vacancy parts inside the two shield segments, and the later-poured concrete connects the originally poured concrete inside the two shield segments, thereby improving the connection strength between two adjacent shield segments in the circumferential direction. Description of the Drawings

[0022] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0023] Figure 1 is a schematic structural diagram of a shield segment provided by an embodiment of the present application.

[0024] Figure 2 is a schematic structural diagram of the segment outer shell provided by an embodiment of the present application.

[0025] Figure 3 is a schematic structural diagram of a spiral rib and an annular rib provided by an embodiment of the present application.

[0026] Figure 4 is a cross-sectional view of the shield segment provided by an embodiment of the present application.

[0027] Figure 5 is a schematic structural diagram of a shield pipe provided by an embodiment of the present application.

[0028] Figure 6 is a schematic flow chart of a method for manufacturing a shield segment provided by an embodiment of the present application.

[0029] Figure 7 is a schematic flow chart of a method for manufacturing a shield pipe provided by an embodiment of the present application.

[0030] Description of the reference numerals: 1, segment outer shell; 11, outer shell body; 111, vacancy part; 12, partition; 13, first end piece; 131, first through hole; 14, second end piece; 141, second through hole; 2, spiral rib; 21, spiral part; 3, concrete; 31, core concrete; 32, interlayer concrete; 4, annular rib. Detailed Embodiments

[0031] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0032] An embodiment of the present application provides a shield segment. The shield segment is used to assemble a shield pipeline in a tunnel to become the innermost barrier of the tunnel, playing a role in resisting soil pressure, groundwater pressure, and some special loads.

[0033] Referring to Figure 1 、 Figure 2 and Figure 3 , the shield segment of the present application includes a segment outer shell 1, spiral rib bars 2, and concrete 3. The segment outer shell 1 serves as the outermost protective layer of the shield segment and also as a container for accommodating the spiral rib bars 2 and the concrete 3; the concrete 3 is poured inside the segment outer shell 1 as the main structure of the shield segment. Generally, after placing the spiral rib bars 2 inside the segment outer shell 1, the concrete 3 is poured, so that after pouring, the concrete 3 and the spiral rib bars 2 are consolidated together; the segment outer shell 1 is configured in an arc shape, and the spiral rib bars 2 are spiral structures disposed inside the segment outer shell 1 and extending along the circumferential direction of the segment outer shell 1. The spiral rib bars 2 are configured in multiple numbers and the multiple spiral rib bars 2 are spaced apart in the axial direction of the segment outer shell 1.

[0034] At least part of the spiral rib bars 2 is buried in the concrete 3. For example, both ends of the spiral rib bars 2 in the circumferential direction of the segment outer shell 1 may protrude from the concrete 3. The spiral rib bars 2 serve as the reinforcing bars of the shield segment to provide constraints for the concrete 3, so that the internal strength of the shield segment is improved in multiple directions, thereby improving the bearing capacity of the shield segment.

[0035] For the shield segment according to the embodiment of the present application, by providing the spiral rib bars 2 inside the segment outer shell 1, the reinforcing rib bars inside the segment outer shell 1 of the present application are different from the existing reinforcing rib bars (for example, straight or crosswise), and have a stronger bearing capacity. Therefore, fewer spiral rib bars 2 can be used to achieve the same bearing capacity, improving the material utilization rate and greatly reducing the use cost of the reinforcing rib bars; in addition, due to the use of the spiral rib bars 2, the bearing performance of the shield segment is better, reducing the thickness of the shield segment, reducing the tunnel excavation volume, and reducing the production cost.

[0036] First, it should be noted that the circumferential and axial directions of the segment outer shell 1 in the embodiment of the present application refer to "the circumferential and axial directions of the cylindrical shape where the arc-shaped segment outer shell 1 is located".

[0037] Referring toFigure 2 According to the segment outer shell 1 of an embodiment of the present application, it includes an outer shell body 11. The outer shell body 11 can be constructed as a steel piece. The outer shell body 11 is an arc-shaped plate structure with a certain thickness, having a rectangular pipe orifice and an arc-shaped pipe body. A plurality of outer shell bodies 11 can be spliced end to end in the circumferential direction of the segment outer shell 1 to form a ring. It should be noted that the "plurality" here can be five, six, seven, etc., and is designed according to the actual working conditions.

[0038] That is to say, the outer shell body 11 is the outer contour member of the segment outer shell 1. The circumferential direction of the outer shell body 11 is the same as that of the segment outer shell 1, and the axial direction of the outer shell body 11 is the same as that of the segment outer shell 1.

[0039] A number of partitions 12 can be arranged inside the outer shell body 11. The number of the partitions 12 can be set as needed, such as three, four, five, etc. The plate surface of each partition 12 can be perpendicular to the axis direction of the outer shell body 11. A number of partitions 12 are spaced apart along the axial direction of the outer shell body 11, thereby dividing the internal space of the segment outer shell 1 into multiple sub-chambers, and each sub-chamber extends along the circumferential direction of the outer shell body 11. By arranging the partitions 12 inside the outer shell body 11, on the one hand, the outer shell body 11 is supported by the partitions 12, enhancing the stiffness of the segment outer shell 1 and reducing the possibility of buckling of the outer shell body 11 before the concrete 3 is crushed; on the other hand, the internal space of the segment outer shell 1 is divided into multiple sub-chambers by the partitions 12, which is convenient for placing the spiral rib bars 2.

[0040] It can be understood that the partitions 12 in the present application can also be constructed as steel pieces. A plurality of partitions 12 can be integrally formed with the outer shell body 11. Of course, a plurality of partitions 12 can also be installed inside the outer shell body 11 by means of welding and fixing.

[0041] Specifically, at least part of the multiple sub-chambers are provided with the spiral rib bars 2. In this embodiment, one spiral rib bar 2 is arranged in each sub-chamber. In other embodiments, one spiral rib bar 2 can be arranged every other sub-chamber. When specifically setting the number of the spiral rib bars 2, it can be designed according to the bearing capacity of the shield segment to be designed. The higher the bearing capacity requirement of the shield segment to be designed, the more the number of the spiral rib bars 2 can be.

[0042] It should be noted that the concrete 3 includes: core concrete 31 flowing into the space defined by the spiral rib 2 and sandwich concrete 32 flowing into the interlayer between the spiral rib 2 and the segment outer shell 1. The spiral rib 2 provides a confinement effect on the core concrete 31; the segment outer shell 1 and the spiral rib 2 provide a composite confinement for the core concrete 31. At the same time, the segment outer shell 1 also provides a confinement for the sandwich concrete 32, improving the strength of the concrete 3, and thus enhancing the bearing capacity of the shield segment.

[0043] As an optional solution, in order to improve the confinement effect of the spiral rib 2 and the segment outer shell 1 on the concrete 3, preferably, the cross-sectional structure of the sub-chamber is designed as a rectangle, and further can be designed as a square. Through the square design, the spiral rib 2 is buried in the exact middle position of the sub-chamber, making the thickness of the sandwich concrete 32 between the spiral rib 2 and the segment outer shell 1 relatively more uniform, thereby improving the confinement effect of the segment outer shell 1 on the sandwich concrete 32.

[0044] Furthermore, in an optional embodiment of the present invention, the shield segment further includes: a circular rib 4, the circular rib 4 is arranged in the internal space of the segment outer shell 1, and the circular rib 4 extends along the circumferential direction of the segment outer shell 1 and is adjacent to the spiral rib 2. The circular rib 4 is buried in the concrete 3 to provide circumferential bearing capacity for the shield segment, further enhancing the bearing capacity of the shield segment.

[0045] Specifically, the circular rib 4 is arranged inside or outside the space defined by the spiral rib 2. In this embodiment, the circular rib 4 is arranged inside the space defined by the spiral rib 2. And the circular rib 4 is fixedly connected to the spiral rib 2.

[0046] By fixing the spiral rib 2 to the circular rib 4, the spiral rib 2 and the circular rib 4 form a reinforced structure assembly, thereby further improving the bearing capacity of the shield segment. In addition, the circular rib 4 can also play a positioning role for the spiral rib 2.

[0047] The spiral rib 2 includes a plurality of spiral portions 21, and each spiral portion 21 is fixedly connected to the circular rib 4. The fixing method can be binding connection or welding. In this embodiment, it is binding connection. By connecting each spiral portion 21 to the circular rib 4, the extension length of each spiral portion 21 is controlled. Preferably, the extension lengths of each spiral portion 21 are equal, so that the spiral rib 2 can uniformly confine the core concrete 31, improving the confinement effect of the spiral rib 2 on the core concrete 31.

[0048] Preferably, the annular ribs 4 are configured in multiple numbers, and the multiple annular ribs 4 are spaced apart along the circumferential direction of the spiral rib 2. In this embodiment, the number of the annular ribs 4 is four, and in other embodiments, the number of the annular ribs 4 may also be other numbers. The multiple annular ribs 4 further provide circumferential bearing capacity for the shield segment, and the multiple annular ribs 4 are spaced apart along the circumferential direction of the spiral rib 2. Each spiral part 21 is fixedly connected to the multiple annular ribs 4, further improving the uniformity of the spiral part 21 and enhancing the constraint effect of the spiral rib 2 on the core concrete 31. Preferably, the number of the annular ribs 4 is an even number (such as two or six), and the even number of annular ribs 4 are symmetrically arranged in both the axial direction and the radial direction of the shield segment, facilitating the uniform stress of the annular ribs 4.

[0049] For the convenience of assembling the shield segment, in the embodiment of the present application, the outer shell body 11 includes: two first end pieces 13 located at both ends in the circumferential direction of the outer shell body 11. Each first end piece 13 is provided with a plurality of first through holes 131 for bolts to pass through, which are uniformly arranged in the axial direction of the outer shell body 11. When the pipe orifice of one outer shell body 11 is correspondingly spliced with the pipe orifice of another outer shell body 11, the first end pieces 13 at the pipe orifices of the two outer shell bodies 11 also correspondingly fit together, and the first through holes 131 on the mutually fitting first end pieces 13 also correspond to each other one by one. When two adjacent shield segments in the circumferential direction are connected to each other, first, bolts are used to pass through the two mutually fitting first end pieces 13 through the first through holes 131 and fastened with nuts.

[0050] Two second end pieces 14 are respectively arranged at both ends of the outer shell body 11 in the axial direction. The planes where the second end pieces 14 are located are all perpendicular to the axis of the outer shell body 11. Each second end piece 14 is provided with a plurality of second through holes 141 for bolts to pass through, which are uniformly arranged and spaced apart in the circumferential direction of the outer shell body 11. When two adjacent pipe shell bodies 1 in the axial direction are spliced, the second end pieces 14 on the two pipe shell bodies 1 fit together, and the second through holes 141 on the two pipe shell bodies 1 correspond to each other. When two adjacent shield segments in the axial direction are connected to each other, bolts are used to pass through the two mutually fitting second end pieces 14 through the second through holes 141 and fastened with nuts.

[0051] Refer to Figure 1 and Figure 4, in order to improve the connection strength between two adjacent shield segments in the circumferential direction, preferably, the sub-chambers are provided with vacant portions 111 where no concrete 3 is poured at both ends in the circumferential direction of the segment outer shell 1, and the spiral rib strips 2 extend into the corresponding vacant portions 111 at both ends in the circumferential direction of the segment outer shell 1. When two adjacent shield segments in the circumferential direction are connected by bolts, concrete 3 can be poured again into the vacant portions 111 inside the two shield segments through on-site drilling or pre-reserved holes. The subsequently poured concrete 3 connects the originally poured concrete 3 inside the two shield segments, thereby improving the connection strength between two adjacent shield segments in the circumferential direction.

[0052] Furthermore, as an optional solution, the segment outer shell 1 is coated with an anti-corrosion coating at least on the side away from its own axis, reducing the possibility of the segment structure being eroded by groundwater, harmful liquids and gases underground.

[0053] Next, refer to Figure 6 to describe a manufacturing method of a shield segment provided by an embodiment of the present application.

[0054] The manufacturing method of the shield segment according to the present application includes at least the following steps:

[0055] S1: Precast the arc-shaped segment outer shell 1, spiral rib strips 2 and annular rib strips 4;

[0056] S2: Place the spiral rib strips 2 and the annular rib strips 4 inside the segment outer shell 1, and the spiral rib strips 2 and the annular rib strips 4 extend along the circumferential direction of the segment outer shell 1;

[0057] S3: Pour concrete 3 into the segment outer shell 1 to cover at least part of the spiral rib strips 2 and the annular rib strips 4.

[0058] When manufacturing a shield segment using the manufacturing method according to the embodiment of the present invention, by embedding the spiral rib strips 2 in the concrete 3 of the segment, the core concrete 31 inside the segment outer shell 1 is constrained by the spiral rib strips 2, further improving the bearing capacity of the shield segment. Therefore, when designing the shield segment, on the premise of meeting the bearing capacity requirements, the thickness of the segment can be correspondingly reduced, achieving the effects of reducing material usage, improving material utilization rate, and reducing production costs. In addition, by reducing the thickness of the shield segment, the excavation volume of the tunnel during the construction process can also be reduced, improving the construction efficiency.

[0059] Further, the segment outer shell 1 further includes an outer shell body 11 and a partition 12 disposed within the outer shell body 11. The partition 12 is adapted to divide the space within the outer shell body 11 into a plurality of sub-chambers. The plate surface of the partition 12 is perpendicular to the axial direction of the outer shell body 11. The partition 12 serves to support the entire segment outer shell 1, enhance the stiffness of the segment outer shell 1, and reduce the likelihood of buckling of the segment outer shell 1 before the concrete 3 breaks up.

[0060] Further, in an alternative embodiment of the present invention, step S2 further includes: placing the spiral rib 2 in at least a portion of the plurality of sub-chambers. The segment outer shell 1 and the spiral rib 2 provide composite confinement for the core concrete 31, improving the load-bearing capacity of the shield segment; when designing the shield segment, according to the requirement of the designed load-bearing capacity, at least some of the sub-chambers have spiral ribs 2 inside, reducing the production cost of the shield segment.

[0061] It should be noted that the concrete 3 flowing into the inside of the spiral rib 2 is configured as core concrete 31, and the concrete 3 flowing between the spiral rib 2 and the segment outer shell 1 is configured as interlayer concrete 32. The spiral rib 2 provides a strong confinement effect on the core concrete 31; the segment outer shell 1 and the spiral rib 2 provide composite confinement for the internal core concrete 31, and at the same time the segment outer shell 1 also provides confinement for the interlayer concrete 32, thereby improving the load-bearing capacity of the shield segment.

[0062] Further, in another alternative embodiment of the present invention, the cross-section of the sub-chamber is configured as a square. By placing the spiral rib 2 at the exact middle position of the sub-chamber, the thickness of the interlayer concrete 32 between the spiral rib 2 and the segment outer shell 1 is made relatively more uniform, thereby improving the confinement effect of the segment outer shell 1 on the interlayer concrete 32.

[0063] The manufacturing method of the shield segment further includes: step S4: curing the core concrete 31 and the interlayer concrete 32, and after the core concrete 31 and the interlayer concrete 32 reach the required strength, by roughening the concrete 3 at both ends, a segment prefabricated component is obtained.

[0064] Further, roughening treatment is performed on both ends of the core concrete 31 and the interlayer concrete 32 in the circumferential direction of the segment outer shell 1. By roughening the concrete 3 at both ends of the core concrete 31 and the interlayer concrete 32 in the circumferential direction of the segment outer shell 1, it is convenient for the concrete 3 of adjacent shield segments in the circumferential direction to be connected by the subsequently poured concrete 3 during the subsequent assembly of the shield segments.

[0065] Further, in another alternative embodiment of the present invention, in step S2, the annular rib 4 is also placed inside the segment outer shell 1. The annular rib 4 extends circumferentially along the segment outer shell 1 and is adjacent to the spiral rib 2. The annular rib 4 is embedded in the concrete 3 to provide circumferential bearing capacity for the shield segment, improving the bearing capacity of the shield segment.

[0066] In this embodiment, the annular rib 4 is formed by bending steel bars. In other embodiments, the annular rib 4 can also be an arc-shaped steel pipe. Thus, the weight of the shield segment can be further reduced, and the overall cost of the shield segment is reduced.

[0067] Further, there are multiple annular ribs 4, and the multiple annular ribs 4 are arranged inside or outside the spiral rib 2. In this embodiment, the multiple annular ribs 4 are all arranged inside the spiral rib 2. The multiple annular ribs 4 can be fixedly connected to the spiral rib 2. Thus, not only can an integral strengthening structure be formed, but also the multiple annular ribs 4 can position the spiral rib 2 and adjust the size of the gaps on the spiral rib 2 at the same time.

[0068] Further, the spiral rib 2 includes: a plurality of adjacent spiral parts 21 in sequence; before the spiral rib 2 is placed inside the segment outer shell 1, the annular rib 4 is fixedly connected to the spiral rib 2 to adjust the lengths of the multiple spiral parts 21 in the extending direction of the spiral rib 2.

[0069] Specifically, each spiral part 21 is fixedly connected to the annular rib 4. In this embodiment, the spiral part 21 and the annular rib 4 are connected by tying. In other embodiments, it can also be welding.

[0070] Through the above technical solution, fixedly connecting the annular rib 4 and the spiral rib 2 can, on the one hand, control the extending lengths of the spiral parts 21, and on the other hand, facilitate the staff to position the spiral rib 2 through the annular rib 4 before pouring the concrete 3. Before pouring the concrete 3, the staff positions the two ends of the annular rib 4 through the positioning members, thereby fixing the spiral rib 2 fixedly connected to the annular rib 4, making the spiral rib 2 suspended inside the segment outer shell 1, so that the spiral rib 2 can restrain the core concrete 31.

[0071] Further, the lengths of the multiple spiral parts 21 in the extending direction of the spiral rib 2 are the same. Thus, the spiral rib 2 can uniformly restrain the core concrete 31, improving the bearing capacity of the shield segment.

[0072] Refer to Figure 5 and Figure 7, the embodiment of the present application also provides a manufacturing method of a shield pipe, including S5: transporting the segment prefabricated components to the construction site, assembling the segment prefabricated components by a shield machine, and finally laying the segment pipes to reach the required length, where the segment prefabricated components are the shield segments manufactured by the shield segment manufacturing method provided by the present application.

[0073] For the manufacturing method of a shield pipe according to an embodiment of the present application, the segment outer shell 1 includes: an outer shell body 11 and a partition 12 arranged inside the outer shell body 11, and the partition 12 is adapted to divide the space inside the outer shell body 11 into a plurality of sub-chambers;

[0074] Leave vacant parts 111 where no concrete 3 is poured at both ends of the sub-chambers in the circumferential direction of the segment outer shell 1, fix two adjacent segment outer shells 1 in the circumferential direction by fasteners, and pour concrete 3 again in the two adjacent vacant parts 111.

[0075] Furthermore, fix two adjacent segment outer shells 1 in the axial direction by fasteners.

[0076] Specifically, the outer shell body 11 includes: two first end plates 13 located at both ends of the outer shell body 11 in the circumferential direction, and a plurality of first through holes 131 for bolts to pass through are uniformly arranged in the axial direction of the outer shell body 11 on each first end plate 13. When the pipe orifice of one outer shell body 11 is spliced corresponding to the pipe orifice of another outer shell body 11, the first end plates 13 at the pipe orifices of the two outer shell bodies 11 also correspond and fit, and the first through holes 131 on the mutually fitting first end plates 13 also correspond one by one. When two adjacent shield segments are connected in the circumferential direction, first use bolts to pass through the two mutually fitting first end plates 13 through the first through holes 131 and fasten with nuts.

[0077] Two second end plates 14 are respectively arranged at both ends of the outer shell body 11 in the axial direction, and the planes where the second end plates 14 are located are both perpendicular to the axis of the outer shell body 11. A plurality of second through holes 141 for bolts to pass through are uniformly arranged and spaced apart in the circumferential direction of the outer shell body 11 on each second end plate 14. When two adjacent segment outer shells 1 are spliced in the axial direction, the second end plates 14 on the two segment outer shells 1 fit each other, and the second through holes 141 on the two segment outer shells 1 correspond to each other. When two adjacent shield segments are connected in the axial direction, use bolts to pass through the two mutually fitting second end plates 14 through the second through holes 141 and fasten with nuts.

[0078] Further, as an alternative solution, before the two adjacent first end pieces 13 on two circumferentially adjacent outer shell bodies 11 are attached to each other, a sealant is applied in a circle on the side surfaces of the two adjacent first end pieces 13 facing each other, and then the two shield segments are circumferentially spliced using bolts; before the two adjacent second end pieces 14 on two axially adjacent outer shell bodies 11 are attached to each other, a sealant is applied on the side surfaces of the two second end pieces 14 facing each other, and then the two shield segments are axially spliced using bolts; by applying sealant at the joints of the shield segments, the possibility of seepage in the shield pipeline is reduced.

[0079] It should be noted that in this embodiment, the shield pipeline is assembled by butt-jointing shield segments. In other embodiments, the shield pipeline can also be assembled by staggering the joints of shield segments.

[0080] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0081] In the description of the present application, the "first feature" and "second feature" may include one or more of such features.

[0082] In the description of the present application, the meaning of "a plurality" is two or more.

[0083] In the description of the present application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0084] In the description of the present application, the first feature being "above", "above the" and "on the" second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0085] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0086] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A shield segment, characterized in that, Comprising: A segment outer shell (1), the segment outer shell (1) being configured as an arc; The segment outer shell (1) includes: an outer shell body (11) and a partition (12) disposed within the outer shell body (11), the partition (12) being adapted to divide the space within the outer shell body (11) into a plurality of sub-chambers, each of the sub-chambers extending circumferentially along the segment outer shell (1); Spiral rib bars (2), the spiral rib bars (2) being disposed within the inner space of the segment outer shell (1), and the spiral rib bars (2) extending circumferentially on the segment outer shell (1), the spiral rib bars (2) being configured as a plurality and the plurality of spiral rib bars (2) being spaced apart axially on the segment outer shell (1); Further comprising: an annular rib bar (4), the annular rib bar (4) being disposed within the inner space of the segment outer shell (1), the annular rib bar (4) extending circumferentially along the segment outer shell (1) and adjacent to the spiral rib bar (2); the annular rib bar (4) being configured as a plurality and the plurality of annular rib bars (4) being spaced apart circumferentially along the spiral rib bar (2); Concrete (3), the concrete (3) being filled within the inner space of the segment outer shell (1) to cover at least a portion of the spiral rib bars (2); The sub-chambers are provided with void portions (111) without poured concrete (3) at both ends in the circumferential direction of the segment outer shell (1), and the spiral rib bars (2) extend into the corresponding void portions (111) at both ends in the circumferential direction of the segment outer shell (1).

2. The segment for shield tunneling according to claim 1, wherein, The partition (12) is configured as a plurality, and the plurality of partitions (12) are spaced apart axially along the segment outer shell (1).

3. The segment for shield tunneling according to claim 1, wherein At least a portion of the plurality of sub-chambers are provided with the spiral rib bars (2).

4. The segment for shield tunneling according to claim 3, wherein, The cross-section of the sub-chamber is configured as a rectangle.

5. The segment for shield tunneling according to any one of claims 1-4, characterized in that, The concrete (3) includes: core concrete (31) flowing into the space defined by the spiral rib bars (2) and sandwich concrete (32) flowing into the interlayer between the spiral rib bars (2) and the segment outer shell (1).

6. The segment for shield tunneling according to claim 1, wherein, The annular rib bar (4) is disposed inside or outside the space defined by the spiral rib bars (2), and the annular rib bar (4) is fixedly connected to the spiral rib bars (2).

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