Hexagonal segmental lining structure and assembling method

Abstract

This application provides a hexagonal segment lining structure and assembly method, relating to the field of shield tunnel technology. The lining structure includes a segment ring, which includes a sub-ring. The sub-ring is formed by splicing multiple first segments around a first axis. Each first segment has a first end face and a second end face. The first end face is connected to a first side face, and the second end face is connected to a second side face. The first side face and the second side face on the same side are connected. In the sub-ring, two adjacent first segments are spliced ​​together through the first side face and the second side face. The three first segments spliced ​​together in sequence form a trapezoidal gap. A filling structure is spliced ​​on the sub-ring to form a flat end face at the end face where the segment ring splices with another adjacent segment ring. By setting the filling structure to fill the trapezoidal gap and form a flat end face, the two segment rings are connected through the flat end face, which can change the relative rotation angle between them, thereby adjusting the overall rotation trend of the lining and improving the control accuracy of the tunnel axis and the safety of the lining structure.

Description

Technical Field

[0001] This application relates to the field of shield tunnel technology, and in particular to a hexagonal segment lining structure and assembly method. Background Technology

[0002] Tunnel boring machine (TBM) construction technology has become the preferred method for modern tunnel engineering due to its high efficiency in tunnel formation and high-quality lining. Among them, hexagonal segment lining technology is widely used in tunnel engineering and urban subway systems in my country due to its high assembly efficiency and good structural stability. However, in curved sections or soft rock formations, hexagonal segments are prone to overall rotation due to uneven stress, leading to a series of problems such as excessive joint misalignment, sealing failure causing leakage, and excessive ellipticity of the pipe ring, which seriously affect the accuracy of the tunnel axis and long-term safety. Summary of the Invention

[0003] The purpose of this application is to address the above problems by providing a hexagonal segment lining structure and assembly method.

[0004] In a first aspect, this application provides a hexagonal segment lining structure, including segment rings, wherein a plurality of segment rings are sequentially spliced ​​along a first direction, and the segment rings include: At least one sub-ring, each sub-ring being formed by splicing multiple first tube segments around a first axis extending along a first direction; the main body of the first tube segment is hexagonal, the first tube segment having a first end face and a second end face symmetrically arranged along the first direction, the two ends of the first end face along the first circumferential direction being respectively connected to a first side face, the two ends of the second end face along the first circumferential direction being respectively connected to a second side face, the first side face and the second side face located on the same side being connected; in the sub-ring, around the first axis, in every two adjacent first tube segments, the two first side faces of one first tube segment are spliced ​​with the second side face of its adjacent first tube segment, the two second side faces of the other first tube segment are spliced ​​with the first side face of its adjacent first tube segment, and the three first tube segments spliced ​​sequentially around the first axis together form a trapezoidal notch; A filling structure is provided, which is used to splice onto the sub-ring to form a flat end face at the end face where the segment ring splices with another adjacent segment ring; the two adjacent segment rings along the first direction are connected to each other through the flat end face to adjust the rotation angle between the two segment rings.

[0005] According to the technical solutions provided in certain embodiments of this application, a plurality of sub-rings are arranged sequentially along the first direction, and two adjacent sub-rings are spliced ​​together by the trapezoidal notch to form a ring structure. The trapezoidal notch is evenly distributed along the first circumferential direction at the axial end of the ring structure. The filling structure includes a second tube segment, which is adapted to the shape of the trapezoidal notch. The second tube segment is used to splice the trapezoidal notch of the sub-ring or the annular structure so that the axial end of the tube segment ring forms a flat end face.

[0006] According to the technical solutions provided in certain embodiments of this application, there is an annular through seam between the two interconnected flat end faces, and the two first tube segments on both sides of the annular through seam and the two second tube segments are fixed by welding. The first and second segments are fixed together by welding along the first direction.

[0007] According to the technical solutions provided in certain embodiments of this application, a first steel plate is pre-embedded at one end of the first segment along the first direction, and the second segment is made of steel. A second steel plate overlaps between the two pipe segments to be welded. One end of the second steel plate is welded and fixed to the first steel plate or the second pipe segment, and the other end of the second steel plate is welded and fixed to the second pipe segment or the first steel plate.

[0008] According to the technical solutions provided in certain embodiments of this application, the second segment includes a first arc plate and a second arc plate. The first arc plate and the second arc plate are distributed along a second direction, which is perpendicular to the first direction. The area of ​​the second arc plate is larger than the area of ​​the first arc plate. A first end plate and a second end plate are respectively connected to the first arc plate and the second arc plate on the same side along the first direction. The area of ​​the second end plate is larger than the area of ​​the first end plate. A side plate is respectively connected to the first arc plate and the second arc plate on the same side along the first circumferential direction. The two ends of the side plate are respectively connected to the first end plate and the second end plate.

[0009] According to the technical solutions provided in certain embodiments of this application, the first arc plate is provided with a first reinforcing structure and a second reinforcing structure. The first reinforcing structure extends along the first direction, and the second reinforcing structure extends along the first circumferential direction. The first reinforcing structure and the second reinforcing structure are distributed intersectingly.

[0010] According to the technical solutions provided in certain embodiments of this application, the central angles of the first tube segment and the second tube segment are both 90 degrees.

[0011] Secondly, this application provides a method for assembling a hexagonal segment lining structure, used to assemble the hexagonal segment lining structure as described above. The lining structure is formed by assembling first segments, second segments, and third segments. The third segment is a first segment with a first steel plate pre-embedded in it. Four first segments are sequentially spliced ​​to form the sub-ring, two first segments and two third segments are alternately spliced ​​to form a splicing ring, and two second segments and two third segments are alternately spliced ​​to form the filling structure. The assembly method includes: Step 1: Assemble the sub-rings so that the two trapezoidal notches of the sub-rings near the shield machine end are located at the top and bottom of the tunnel, respectively, and multiple sub-rings are sequentially spliced ​​along the first direction; Step 2: After each sub-ring is assembled, its rotation angle relative to the tunnel is measured. If the rotation angle of the sub-ring reaches a preset value, the splicing ring is assembled on the sub-ring. In the splicing ring, the first segment is used at the top and bottom of the tunnel, and the third segment is used at the sides of the tunnel. Step 3: Assemble the first filling structure on the splicing ring and measure the rotation angle of the first filling structure relative to the tunnel; in the first filling structure, the third segment is used at the top and bottom of the tunnel, and the second segment is used at the sides of the tunnel; Step 4: Based on the rotation angle of the first filling structure relative to the tunnel, assemble the second filling structure on the first filling structure so that the rotation angle of the second filling structure relative to the tunnel is 0. Step 5: At the two trapezoidal gaps near the shield machine end of the second filling structure, the third segment is spliced, and the sub-rings are spliced ​​along the first direction. After each sub-ring is assembled, its rotation angle relative to the tunnel is measured. If the rotation angle of the sub-ring reaches the preset value, steps 2 to 5 are repeated until the lining structure is completed.

[0012] According to the technical solutions provided in certain embodiments of this application, the step of assembling the first filling structure on the splicing ring and measuring the rotation angle of the first filling structure relative to the tunnel includes: A third segment is spliced ​​on the splicing ring at the bottom of the tunnel, and the rotation angle of the third segment is measured. A second tube segment is spliced ​​to each end of the third tube segment along the first circumferential direction, and the second tube segments are welded and fixed to the third tube segment in the splicing ring. A third segment is spliced ​​between the two second segments to form the first filling structure.

[0013] According to the technical solutions provided in certain embodiments of this application, the step of assembling a second filling structure on the first filling structure based on the rotation angle of the first filling structure relative to the tunnel, so that the rotation angle of the second filling structure relative to the tunnel is 0, includes: Based on the rotation angle of the first filling structure relative to the tunnel, a third segment is spliced ​​on the first filling structure at the position at the bottom of the tunnel, while the rotation angle of the third segment relative to the tunnel is 0, and the third segment is welded and fixed to the third segment and / or the second segment in the first filling structure. A second tube segment is spliced ​​to each end of the third tube segment along the first circumferential direction, and the second tube segment is welded and fixed to the third tube segment and / or the second tube segment in the first filling structure. A third segment is spliced ​​between the two second segments, and the third segment is welded and fixed to the third segment and / or the second segment in the first filling structure to form a second filling structure.

[0014] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a hexagonal segment lining structure and assembly method. The lining structure includes segment rings, multiple segment rings are sequentially spliced ​​along a first direction, and each segment ring includes at least one sub-ring. Each sub-ring is formed by splicing multiple first segments around a first axis, which extends along the first direction. The main body of the first segment is hexagonal, and the first segment has symmetrically arranged first end faces and second end faces along the first direction. The two ends of the first end face along the first circumferential direction are respectively connected to first side faces, and the two ends of the second end face along the first circumferential direction are respectively connected to second side faces. The first side faces and second side faces on the same side are connected. In the sub-ring, around the first axis, in each pair of adjacent first segments, the two first side faces of one first segment are connected to the two side faces of the adjacent first segment. The second side is spliced, and the two second sides of another first segment are spliced ​​with the first side of its adjacent first segment. The three first segments spliced ​​around the first axis together form a trapezoidal gap. A filling structure is spliced ​​on the sub-ring to make the end face of the segment ring spliced ​​with the adjacent segment ring form a flat end face. The two adjacent segment rings along the first direction are connected to each other through the flat end face to adjust the rotation angle between the two segment rings. By setting the filling structure to fill the trapezoidal gap of the sub-ring, the axial end of the segment ring forms a flat end face. The two segment rings are connected to each other through the flat end face, which can change the relative rotation angle between the two segment rings, adjust the rotation trend of the lining as a whole, and significantly improve the control accuracy of the tunnel axis and the long-term safety and adaptability of the lining structure.

[0015] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a plan view of a hexagonal segment lining structure provided in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the structure of the second segment of a hexagonal segment lining structure provided in Embodiment 1 of this application; Figure 3 This is another structural schematic diagram of the second segment of a hexagonal segment lining structure provided in Embodiment 1 of this application; Figure 4 This is a flowchart illustrating a method for assembling a hexagonal segment lining structure as provided in Embodiment 2 of this application.

[0018] The text labels in the image represent: 1. First segment; 2. Second segment; 3. Third segment; 4. Sub-ring; 5. Annular through joint; 6. Trapezoidal notch; 11. First arc plate; 12. Second arc plate; 13. First end plate; 14. Second end plate; 15. Side plate; 31. First steel plate; 32. Second steel plate; 101. First reinforcing plate; 102. Second reinforcing plate; 103. First rib; 104. Third reinforcing plate; 105. Fourth reinforcing plate; 106. Second rib; 107. Fifth reinforcing plate; 108. Sixth reinforcing plate; 109. Grouting hole. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions in this section are merely illustrative and explanatory, and should not be construed as limiting the scope of protection of this application. Specifically, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the scope of protection of this application.

[0020] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0021] Example 1 As mentioned in the background section, to address the problems existing in the prior art, this embodiment provides a hexagonal segment lining structure, including segment rings, with multiple segment rings sequentially spliced ​​along a first direction. The segment rings include: At least one sub-ring 4, each sub-ring 4 is formed by splicing first tube segments 1 around a first axis, the first axis extending along a first direction, the main body of the first tube segment 1 is hexagonal, the first tube segment 1 has a first end face and a second end face symmetrically arranged along the first direction, the two ends of the first end face along the first circumferential direction are respectively connected to the first side face, the two ends of the second end face along the first circumferential direction are respectively connected to the second side face, the first side face and the second side face located on the same side are connected; in the sub-ring 4, around the first axis, in every two adjacent first tube segments 1, the two first side faces of one first tube segment 1 are spliced ​​with the second side face of its adjacent first tube segment 1, the two second side faces of the other first tube segment 1 are spliced ​​with the first side face of its adjacent first tube segment 1, and the three first tube segments 1 spliced ​​sequentially around the first axis together form a trapezoidal notch 6; The filling structure is used to splice on the sub-ring 4 so that the end face where the segment ring splices with another adjacent segment ring forms a flat end face; the two adjacent segment rings along the first direction are connected to each other through the flat end face to adjust the rotation angle between the two segment rings. Furthermore, multiple sub-rings 4 are arranged sequentially along the first direction, and two adjacent sub-rings 4 are spliced ​​together by trapezoidal notches 6 to form a ring structure. The axial ends of the ring structure are evenly distributed with trapezoidal notches 6 along the first circumferential direction. The filling structure includes a second tube segment 2, which is adapted to the shape of the trapezoidal notch 6. The second tube segment 2 is used to splice at the trapezoidal notch 6 of the sub-ring 4 or the annular structure so that the axial end of the tube segment ring forms a flat end face.

[0022] like Figure 1 As shown, the first direction is the axial direction of the tunnel, i.e. Figure 1 The direction indicated by the middle arrow A is the second direction, which is the radial direction of the tunnel. Figure 3 The direction indicated by the middle arrow B, the first circumferential direction, is the circumferential direction of the tunnel, that is... Figure 3 In the direction indicated by arrow C, the first axis is the central axis of the tunnel. The projection of the first segment 1 along the radial direction of the tunnel is hexagonal, approximately formed by splicing the lower bases of two isosceles trapezoids. The first end face and the second end face have the same shape and size and correspond to the upper base of the isosceles trapezoid. The first side face and the second side face have the same shape and size and correspond to the hypotenuse of the isosceles trapezoid. In the lining structure, the first end face and the second end face are distributed along the first direction. The first end face is located on the side of the first segment 1 away from the tunnel boring machine, and the second end face is located on the side of the first segment 1 closer to the tunnel boring machine. The two first side faces are respectively connected to the two ends of the first end face and are symmetrical about the first direction. The two second side faces are respectively connected to the two ends of the second end face and are symmetrical about the first direction. The free ends of the first side face and the second side face on the same side of the first segment 1 are connected. Multiple first segments 1 are spliced ​​sequentially around the first axis to form a sub-ring 4. The first segments 1 in a single sub-ring 4 are divided into a first group and a second group. The first segments 1 in the first group are located closer to the tunnel boring machine in the sub-ring 4. On one side, the first segment 1 of the second group is located away from the shield machine in the sub-ring 4. The two first sides of the first segment 1 of the first group are spliced ​​with the second sides of the two adjacent first segments 1 of the second group, so that the axial end of the sub-ring 4 forms a structure with trapezoidal protrusions and trapezoidal gaps 6 alternately distributed. Multiple sub-rings 4 are arranged sequentially along the first direction. The two adjacent sub-rings 4 are spliced ​​with each other through trapezoidal protrusions and trapezoidal gaps 6 to form a ring structure. The filling structure includes the second segment 2 and the third segment 3. The second segment 2 has the same shape and size as the trapezoidal protrusion, and its outline is adapted to the trapezoidal gap 6. It can be spliced ​​at the trapezoidal gap 6 of the sub-ring 4 or the ring structure to form a flat end face at the axial end of the segment ring. When splicing the next segment ring on the flat end face, it is no longer restricted by the trapezoidal gap 6. The rotation angle between the two segment rings can be adjusted, thereby correcting the overall rotation of the lining structure caused by uneven force. The trapezoidal gap 6 between the next segment ring and the flat end face is also spliced ​​and filled by the second segment 2.

[0023] By setting a second segment 2 to fill the trapezoidal gap 6 of the sub-ring 4 or the annular structure, a flat end face is formed at the axial end of the segment ring. The two segment rings are connected to each other through the flat end face, thereby changing the relative rotation angle between the two segment rings and adjusting the rotation trend of the lining as a whole. This significantly improves the control accuracy of the tunnel axis and the long-term safety and adaptability of the lining structure.

[0024] In a preferred embodiment, there is an annular through-slit 5 between two interconnected flat end faces, and the two first tube segments 1 on both sides of the annular through-slit 5 and the two second tube segments 2 are fixed by welding. The first segment 1 and the second segment 2, which are adjacent to each other along the first direction, are fixed together by welding.

[0025] like Figure 1 As shown, there is an annular through seam 5 between two interconnected flat end faces. Since there are no longer trapezoidal pieces or trapezoidal notches 6 that can be assembled on the flat end faces, the tubes on both sides of the annular through seam 5 are connected by high-strength bolts and then reinforced by welding. Similarly, the first tube 1 and the second tube 2 adjacent to each other along the first direction are connected by bolts and then reinforced by welding.

[0026] Furthermore, a first steel plate 31 is pre-embedded at one end of the first segment 1 along the first direction, and the second segment 2 is made of steel. A second steel plate 32 is overlapped between the two pipe segments to be welded. One end of the second steel plate 32 is welded and fixed to the first steel plate 31 or the second pipe segment 2, and the other end of the second steel plate 32 is welded and fixed to the second pipe segment 2 or the first steel plate 31. Specifically, the second segment 2 is a steel segment made of Q235B steel, and the first segment 1 is a concrete segment with a first steel plate 31 pre-embedded at one end along the first direction. Multiple first steel plates 31 are evenly distributed along the first circumferential direction. In this embodiment, three first steel plates 31 are pre-embedded in each first segment 1. During welding, a second steel plate 32 overlaps between the two segments to be welded. When the object to be welded is the first segment 1, one end of the second steel plate 32 is welded and fixed to the first steel plate 31 at the end of the first segment 1. When the object to be welded is the second segment 2, one end of the second steel plate 32 is directly welded and fixed to the body of the second segment 2.

[0027] In a preferred embodiment, the second segment 2 includes a first arc plate 11 and a second arc plate 12, which are distributed along a second direction perpendicular to the first direction. The area of ​​the second arc plate 12 is larger than the area of ​​the first arc plate 11. A first end plate 13 and a second end plate 14 are respectively connected to the first arc plate 11 and the second arc plate 12 on the same side along the first direction. The area of ​​the second end plate 14 is larger than the area of ​​the first end plate 13. A side plate 15 is respectively connected to the first arc plate 11 and the second arc plate 12 on the same side along the first circumferential direction. The two ends of the side plate 15 are respectively connected to the first end plate 13 and the second end plate 14.

[0028] like Figure 2 and Figure 3 As shown, both the first arc plate 11 and the second arc plate 12 are arc-shaped steel plates, and their unfolded shapes are approximately isosceles trapezoids. The area of ​​the second arc plate 12 is larger than that of the first arc plate 11. The two are coaxially arranged, and the second arc plate 12 is located on the side of the first arc plate 11 away from the tunnel's central axis. The first end plate 13 and the second end plate 14 are also arc-shaped steel plates, and their unfolded shapes are approximately fan-shaped. The first end plate 13 and the second end plate 14 are distributed along a first direction. The two arc-shaped edges of the first end plate 13 are respectively connected to the shorter arc-shaped edges of the first arc plate 11 and the second arc plate 12 along the first direction. The two arc-shaped edges of the second end plate 14 are respectively connected to the shorter arc-shaped edges of the first arc plate 11 and the second arc plate 12 along the first direction. The side plate 15 is approximately a parallelogram structure. The two side plates 15 are respectively located at both ends of the first arc plate 11 along the first circumferential direction, and are fixedly connected to the first arc plate 11, the second arc plate 12, the first end plate 13, and the second end plate 14 respectively. The first arc plate 11, the second arc plate 12, the first end plate 13, the second end plate 14, and the two side plates 15 together form a second tube segment 2 with a first space inside. The first arc plate 11 is provided with grouting holes 109. Two sets of grouting holes 109 are distributed along the first circumferential direction. Each set has three grouting holes 109 distributed along the first direction. The grouting holes 109 are used to inject grout into the first space.

[0029] Furthermore, the first arc plate 11 is provided with a first reinforcing structure and a second reinforcing structure. The first reinforcing structure extends along a first direction, and the second reinforcing structure extends along a first circumferential direction. The first reinforcing structure and the second reinforcing structure are distributed intersectingly. Specifically, the first reinforcing structure includes multiple first reinforcing plates 101, second reinforcing plates 102, and first ribs 103. The second reinforcing structure includes multiple third reinforcing plates 104, fourth reinforcing plates 105, and second ribs 106. Two fourth reinforcing plates 105 are provided, distributed along a first direction on the side of the first arc plate 11 away from the second arc plate 12, and extending along a first circumferential direction. One fourth reinforcing plate 105 is fixed to the first end plate 13, and the other fourth reinforcing plate 105 is fixed to the second end plate 14. Two third reinforcing plates 104 are distributed along the first direction between the two fourth reinforcing plates 105, also extending along the first circumferential direction. A set of first reinforcing plates 101 is provided between the two third reinforcing plates 104. Multiple first reinforcing plates 101 are evenly spaced along the first circumferential direction, extending along the first direction, and their ends are respectively fixed to the two third reinforcing plates 104. Two sets of second reinforcing plates 102... The first reinforcing plates 104 are respectively disposed on opposite sides of the two third reinforcing plates 104. Multiple second reinforcing plates 102 are also equally spaced along the first circumferential direction and correspond to the first reinforcing plate 101 in the first direction. The second reinforcing plates 102 extend along the first direction and are fixed at both ends to the third reinforcing plate 104 and the fourth reinforcing plate 105, respectively. Multiple first ribs 103 are equally spaced along the first circumferential direction and fixed to the corresponding first reinforcing plate 101 and second reinforcing plate 102 in the first direction. The first ribs 103 extend along the first direction and are fixed at both ends to the first end plate 13 and the second end plate 14, respectively. Two second ribs 106 are respectively fixed to the two third reinforcing plates 104. The second ribs 106 extend along the first circumferential direction and are fixed at both ends to the two side plates 15, respectively. Furthermore, a fifth reinforcing plate 107 and a sixth reinforcing plate 108 are provided near the side plates 15, both of which are closely attached to the side plates 15 and extend in the same direction as the side plates 15.

[0030] Furthermore, the central angles of the first segment 1 and the second segment 2 are both 90 degrees, and the segment ring is formed by sequentially splicing four first segments 1 along the first circumferential direction.

[0031] Example 2 Please refer to Figure 4 This is a flowchart illustrating a method for assembling a hexagonal segment lining structure as provided in this embodiment. The assembly method is used to assemble the hexagonal segment lining structure as described in Embodiment 1. The lining structure is formed by assembling a first segment 1, a second segment 2, and a third segment 3. The third segment 3 is a first segment 1 with a pre-embedded first steel plate 31. Four first segments 1 are sequentially spliced ​​to form a sub-ring; two first segments 1 and two third segments 3 are alternately spliced ​​to form a splicing ring; two second segments 2 and two third segments 3 are alternately spliced ​​to form a filling structure. The assembly method includes: S1. Assemble the sub-rings so that the two trapezoidal notches 6 of the sub-rings near the shield machine are located at the top and bottom of the tunnel respectively, and multiple sub-rings are spliced ​​together in sequence along the first direction; Before on-site assembly, a trial assembly should be conducted to verify the manufacturing and assembly accuracy and ensure that the requirements are met. Initially, the first segment 1 is spliced ​​around the first axis inside the tunnel to form a sub-ring, and multiple sub-rings are spliced ​​sequentially along the first direction.

[0032] S2. After each sub-ring is assembled, its rotation angle relative to the tunnel is measured. If the rotation angle of the sub-ring reaches the preset value, a splicing ring is assembled on the sub-ring. In the splicing ring, the first segment 1 is used at the top and bottom of the tunnel, and the third segment 3 is used at the sides of the tunnel. After each sub-ring is spliced, the rotation angle of the sub-ring is determined based on the offset distance of each first segment 1 relative to the support cylinder. During adjustment, the relative rotation of the segments on both sides of the annular joint 5 should not exceed 100cm. Based on this, a preset value is set. When the rotation amount or rotation angle of the sub-ring approaches or reaches the preset value, a splicing ring is spliced ​​on the spliced ​​sub-ring. First, a first segment 1 is spliced ​​on the sub-ring at the bottom of the tunnel. Then, a third segment 3 is spliced ​​at each end of the first segment 1 along the first circumferential direction, at the two sides of the tunnel. The end of the third segment 3 with the first steel plate 31 embedded in it faces the shield machine. Finally, a first segment 1 is spliced ​​between the two third segments 3 at the top of the tunnel to form a splicing ring.

[0033] S3. Assemble the first filling structure on the first splicing ring and measure the rotation angle of the first filling structure relative to the tunnel; in the filling structure, the third segment 3 is used at the top and bottom of the tunnel, and the second segment 2 is used at the sides of the tunnel. S31. A third segment 3 is spliced ​​on the first splicing ring at the bottom of the tunnel, and the rotation angle of the third segment 3 is measured. On the splicing ring formed in S2, a third segment 3 is spliced ​​at the bottom of the tunnel. One end of the third segment 3 with the first steel plate 31 embedded in it faces the shield machine. The rotation angle of the third segment 3 relative to the tunnel is determined based on the offset distance between the third segment 3 and the corresponding support cylinder.

[0034] S32. A second segment 2 is spliced ​​at each end of the third segment 3 along the first circumferential direction, and the second segment 2 is welded and fixed to the third segment 3 in the splicing ring. At both ends of the third segment 3 spliced ​​in S31 along the first circumferential direction, a second segment 2 is spliced ​​at each position on both sides of the tunnel. The second segment 2 is welded and fixed to the third segment 3 in the splicing ring formed in S2. A second steel plate 32 is overlapped between the second segment 2 and the third segment 3. One end of the second steel plate 32 is welded and fixed to the second segment 2, and the other end is welded and fixed to the first steel plate 31 pre-embedded in the third segment 3. The second steel plate 32 is 30cm long and 15cm wide. Carbon dioxide gas shielded welding is used during welding. The weld height is 10mm. When the weld is located on the outer surface of the lining structure, it needs to be leveled after welding. After welding, 100% magnetic flaw detection is performed to ensure the water tightness of the weld on the outer surface of the lining structure.

[0035] Furthermore, the second segment 2 and its connecting parts need to be rust-proofed. A zinc-chromium coating is used to rust-proof the second segment 2 and its connecting parts. The coating thickness is not less than 8μm. Before applying the coating, the surface of the second segment 2 and its connecting parts should be derusted. The zinc-chromium coating grade is not lower than level 3. The coating surface is sealed with two coats of epoxy resin paint. The thickness of the resin paint layer is not less than 240μm.

[0036] S33. A third segment 3 is spliced ​​between the two second segments 2 to form the first filling structure; Between the two second segments 2 spliced ​​in S32, a third segment 3 is spliced ​​at the top of the tunnel to form the first filling structure. The end of the third segment 3 with the first steel plate 31 embedded in it also faces the shield machine side.

[0037] S4. Based on the rotation angle of the first filling structure relative to the tunnel, assemble the second filling structure on the first filling structure so that the rotation angle of the second filling structure is 0. S41. Based on the rotation angle of the first filling structure relative to the tunnel, a third segment 3 is spliced ​​on the first filling structure at the position at the bottom of the tunnel, while making the rotation angle of the third segment 3 relative to the tunnel 0, and welding and fixing the third segment 3 to the third segment 3 and / or the second segment 2 in the first filling structure. Since the first filling structure forms a flat end face near the tunnel boring machine, the relative position of the segment to be spliced ​​and the first filling structure can be adjusted during subsequent splicing. According to the rotation angle of the first filling structure relative to the tunnel measured in S31, a third segment 3 is spliced ​​on the first filling structure at the bottom of the tunnel, so that the rotation angle of the third segment 3 relative to the tunnel is 0. The end of the third segment 3 with the first steel plate 31 embedded in it faces the first filling structure. The third segment 3 is welded and fixed to the third segment 3 and / or the second segment 2 in the first filling structure, and the welding is also carried out by overlapping the second steel plate 32.

[0038] S42. A second segment 2 is spliced ​​at each end of the third segment 3 along the first circumferential direction, and the second segment 2 is welded and fixed to the third segment 3 and / or the second segment 2 in the first filling structure. In S41, at both ends of the third segment 3 along the first circumferential direction, a second segment 2 is assembled on each side of the tunnel, and the second segment 2 is welded and fixed to the third segment 3 and / or the second segment 2 in the first filling structure.

[0039] S43. A third segment 3 is spliced ​​between two second segments 2, and the third segment 3 is welded and fixed to the third segment 3 and / or the second segment 2 in the first filling structure to form the second filling structure. Between the two second segments 2 spliced ​​in S42, a third segment 3 is spliced ​​at the top of the tunnel. The end of the third segment 3 with the first steel plate 31 pre-embedded is also facing the side of the first filling structure. The third segment 3 is welded and fixed to the third segment 3 and / or the second segment 2 in the first filling structure to form the second filling structure.

[0040] S5. At the two trapezoidal gaps 6 near the shield machine end of the second filling structure, the third segment 3 is spliced ​​respectively, and the sub-rings are spliced ​​along the first direction. After each sub-ring is assembled, its rotation angle relative to the tunnel is measured. If the rotation angle of the sub-ring reaches the preset value, S2-S5 are repeated until the lining structure is spliced.

[0041] At the two trapezoidal gaps 6 near the shield machine end of the second filling structure, the third segment 3 is spliced. The end of the third segment 3 with the first steel plate 31 pre-embedded faces the second filling structure. The third segment 3 is welded and fixed to the second segment 2 in the second filling structure. Sub-rings are spliced ​​on the second filling structure and the two third segments 3. After each sub-ring is spliced, its rotation angle relative to the tunnel is measured. If the lining structure rotates, the above steps S2-S5 are repeated for adjustment until the lining structure is assembled.

[0042] It should be noted that an annular through joint 5 is formed between the flat end faces of the two filling structures. The annular through joint 5 should be set in a place with good surrounding rock conditions and no or little water to ensure the effectiveness of waterproofing of the annular through joint 5. When the annular through joint 5 is located in a watery place, grouting and water blocking measures should be taken. The maximum rotation of the pipe segments on both sides of the annular through joint 5 should not exceed 100cm, and the connection of the pipe segments on both sides of the annular through joint 5 should be reliable after rotation.

[0043] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A hexagonal segment lining structure, characterized in that, The segment rings include multiple segment rings sequentially spliced ​​along a first direction, wherein the segment rings include: At least one sub-ring (4), each of the sub-rings (4) is formed by splicing multiple first tube segments (1) around a first axis, the first axis extending along the first direction; the main body of the first tube segment (1) is hexagonal, the first tube segment (1) has a first end face and a second end face symmetrically arranged along the first direction, the first end face is connected to the first side face at both ends along the first circumferential direction, the second end face is connected to the second side face at both ends along the first circumferential direction, the first side face and the second side face located on the same side are connected; in the sub-ring (4), around the first axis, in each of two adjacent first tube segments (1), the two first side faces of one first tube segment (1) are spliced ​​to the second side face of its adjacent first tube segment (1), the two second side faces of another first tube segment (1) are spliced ​​to the first side face of its adjacent first tube segment (1), and the three first tube segments (1) spliced ​​sequentially around the first axis together form a trapezoidal notch (6). A filling structure is used to splice the sub-ring (4) so ​​that a flat end face is formed at the end face where the segment ring splices with another adjacent segment ring; the two adjacent segment rings along the first direction are connected to each other through the flat end face to adjust the rotation angle between the two segment rings.

2. The hexagonal segment lining structure according to claim 1, characterized in that, Multiple sub-rings (4) are arranged sequentially along the first direction. Two adjacent sub-rings (4) are spliced ​​together to form a ring structure through the trapezoidal notch (6). The trapezoidal notches (6) are evenly distributed along the first circumferential direction at the axial end of the ring structure. The filling structure includes a second tube segment (2), which is adapted to the shape of the trapezoidal notch (6). The second tube segment (2) is used to splice the sub-ring (4) or the trapezoidal notch (6) of the annular structure so that the axial end of the tube segment ring forms a flat end face.

3. The hexagonal segment lining structure according to claim 2, characterized in that, There is an annular through seam (5) between the two interconnected flat end faces, and the two first tube segments (1) on both sides of the annular through seam (5) and the two second tube segments (2) are fixed by welding; The first segment (1) and the second segment (2) adjacent to each other along the first direction are fixed together by welding.

4. The hexagonal segment lining structure according to claim 3, characterized in that, The first segment (1) has a first steel plate (31) pre-embedded at one end along the first direction, and the second segment (2) is made of steel. A second steel plate (32) is overlapped between the two pipe segments to be welded. One end of the second steel plate (32) is welded and fixed to the first steel plate (31) or the second pipe segment (2), and the other end of the second steel plate (32) is welded and fixed to the second pipe segment (2) or the first steel plate (31).

5. A hexagonal segment lining structure according to claim 2, characterized in that, The second segment (2) includes a first arc plate (11) and a second arc plate (12). The first arc plate (11) and the second arc plate (12) are distributed along a second direction, which is perpendicular to the first direction. The area of ​​the second arc plate (12) is larger than the area of ​​the first arc plate (11). The first arc plate (11) and the second arc plate (12) are respectively connected to a first end plate (13) and a second end plate (14) on the same side along the first direction. The area of ​​the second end plate (14) is larger than the area of ​​the first end plate (13). The first arc plate (11) and the second arc plate (12) are respectively connected to a side plate (15) on the same side along the first circumferential direction. The two ends of the side plate (15) are respectively connected to the first end plate (13) and the second end plate (14).

6. A hexagonal segment lining structure according to claim 5, characterized in that, The first arc plate (11) is provided with a first reinforcing structure and a second reinforcing structure. The first reinforcing structure extends along the first direction, and the second reinforcing structure extends along the first circumferential direction. The first reinforcing structure and the second reinforcing structure are distributed intersectingly.

7. A hexagonal segment lining structure according to claim 2, characterized in that, The central angles of the first segment (1) and the second segment (2) are both 90 degrees.

8. A method for assembling a hexagonal segment lining structure, used for assembling the hexagonal segment lining structure as described in any one of claims 1-7, characterized in that, The lining structure is formed by assembling a first segment (1), a second segment (2), and a third segment (3). The third segment (3) is a first segment (1) with a first steel plate (31) pre-embedded in it. Four first segments (1) are sequentially spliced ​​to form the sub-ring, two first segments (1) and two third segments (3) are alternately spliced ​​to form a splicing ring, and two second segments (2) and two third segments (3) are alternately spliced ​​to form the filling structure. The assembly method includes: Step 1: Assemble the sub-rings so that the two trapezoidal notches (6) of the sub-rings near the shield machine end are located at the top and bottom of the tunnel, respectively, and multiple sub-rings are spliced ​​together in sequence along the first direction; Step 2: After each sub-ring is assembled, its rotation angle relative to the tunnel is measured. If the rotation angle of the sub-ring reaches a preset value, the splicing ring is assembled on the sub-ring. In the splicing ring, the first segment (1) is used at the top and bottom of the tunnel, and the third segment (3) is used at the sides of the tunnel. Step 3: Assemble the first filling structure on the splicing ring and measure the rotation angle of the first filling structure relative to the tunnel; in the first filling structure, the third segment (3) is used at the top and bottom of the tunnel, and the second segment (2) is used at the sides of the tunnel. Step 4: Based on the rotation angle of the first filling structure relative to the tunnel, assemble the second filling structure on the first filling structure so that the rotation angle of the second filling structure relative to the tunnel is 0. Step 5: Splice the third segment (3) at the two trapezoidal gaps (6) near the shield machine end of the second filling structure, and continue to splice the sub-rings along the first direction. After each sub-ring is assembled, measure its rotation angle relative to the tunnel. If the rotation angle of the sub-ring reaches the preset value, repeat steps 2 to 5 until the lining structure is completed.

9. The assembly method of a hexagonal segment lining structure according to claim 8, characterized in that, The process of assembling the first filling structure on the splicing ring and measuring the rotation angle of the first filling structure relative to the tunnel includes: A third segment (3) is spliced ​​on the splicing ring at the bottom of the tunnel, and the rotation angle of the third segment (3) is measured. A second tube segment (2) is spliced ​​to each end of the third tube segment (3) along the first circumferential direction, and the second tube segment (2) is welded and fixed to the third tube segment (3) in the splicing ring; A third segment (3) is spliced ​​between two second segments (2) to form the first filling structure.

10. The assembly method of a hexagonal segment lining structure according to claim 8, characterized in that, The step of assembling a second filling structure on the first filling structure based on the rotation angle of the first filling structure relative to the tunnel, such that the rotation angle of the second filling structure relative to the tunnel is 0, includes: According to the rotation angle of the first filling structure relative to the tunnel, a third segment (3) is spliced ​​on the first filling structure at the position at the bottom of the tunnel, while the rotation angle of the third segment (3) relative to the tunnel is 0, and the third segment (3) is welded and fixed to the third segment (3) and / or the second segment (2) in the first filling structure. A second tube segment (2) is spliced ​​at each end of the third tube segment (3) along the first circumferential direction, and the second tube segment (2) is welded and fixed to the third tube segment (3) and / or the second tube segment (2) in the first filling structure; A third tube segment (3) is spliced ​​between two second tube segments (2), and the third tube segment (3) is welded and fixed to the third tube segment (3) and / or the second tube segment (2) in the first filling structure to form a second filling structure.

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