CN210460681U - Shield segment and shield segment assembling structure - Google Patents
Shield segment and shield segment assembling structure Download PDFInfo
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- CN210460681U CN210460681U CN201920771550.1U CN201920771550U CN210460681U CN 210460681 U CN210460681 U CN 210460681U CN 201920771550 U CN201920771550 U CN 201920771550U CN 210460681 U CN210460681 U CN 210460681U
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Abstract
The utility model relates to a shield constructs section of jurisdiction, including the section of jurisdiction body, the section of jurisdiction body has two vertical ends and two hoop ends, one of them vertical end is equipped with mortise portion, another vertical end be equipped with the tenon portion of mortise portion adaptation, mortise portion and/or tenon portion is equipped with the steel cap, the steel cap cladding corresponds the at least partial region of tenon portion. Still relate to a shield structure is assembled to section of jurisdiction in addition, include two section of jurisdiction rings based on unsmooth tenon structure concatenation, in two sections of jurisdiction that unsmooth tenon structure corresponds, at least one of them section of jurisdiction adopts foretell shield section of jurisdiction. The steel cap is arranged on the tenon portion, so that the shearing resistance of the tenon portion can be improved, the shearing resistance of the shield segment/segment ring is effectively improved, the damage of the concrete tenon portion caused by impact in the assembling process and the like can be reduced, and the construction quality of the shield tunnel is ensured.
Description
Technical Field
The utility model relates to a shield constructs section of jurisdiction and adopts shield of this shield structure section of jurisdiction to construct section of jurisdiction structure of assembling.
Background
With the rapid development of national infrastructure, more and more tunnels are built in railways, highways and municipal works by adopting a shield method, the tunnel sections are also larger and larger, and the segment structure with the diameter of 15m level of the shield tunnel is generally applied at present.
The increase of the diameter of the shield segment means that the buoyancy borne by the shield tunnel is increased, and the shearing force borne by the segment in the circumferential direction is correspondingly increased; meanwhile, the annular shearing force of the duct piece can be increased due to the staggering caused by duct piece assembling or external force action in the operation period in the construction process. Set up unsmooth tenon structure between segment ring 1 and can control the shield and construct the tunnel ring 1 between the wrong platform volume, avoid causing tunnel structure destruction and waterproof inefficacy because of the wrong platform volume is big between segment ring 1.
As shown in fig. 1, in the existing tenon and mortise design, concrete tenons 12 and 11 are respectively arranged on two sides of a circular seam of a duct piece, the tenon 11 and the tenon 12 are tightly extruded together through a middle cushion plate 2 by thrust of a shield machine jack and duct piece bolt fastening force, and the shearing resistance requirement is met by the concrete tenon and the steel bar in the duct piece. The current tongue and groove design has several problems:
1) the shield machine attitude control is not good in the construction process, and the segment is staggered or collided in the segment assembling process, so that the concrete tenon and mortise are damaged.
2) In the segment production process, because the segment mould space is smaller, the binding and fixing of the structural steel bars at the tenon and mortise positions are more difficult.
3) The concrete tenon and mortise have limited shearing resistance, so that the local shearing damage of the duct piece is easily caused, and the water leakage is caused.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a shield constructs section of jurisdiction and adopts this shield to construct shield of jurisdiction to construct section of jurisdiction and assembles the structure, can solve prior art's partial defect at least.
An embodiment of the utility model relates to a shield constructs section of jurisdiction, including the section of jurisdiction body, the section of jurisdiction body has two vertical ends and two hoop ends, one of them vertical end is equipped with mortise portion, another vertical end be equipped with the tenon portion of mortise portion adaptation, mortise portion and/or tenon portion is equipped with the steel cap, the steel cap cladding corresponds the at least part region of tenon portion.
In one embodiment, the steel cap is anchored to the segment body by anchor bars.
In one embodiment, the concave tenon portion is connected with a concave steel cap, the concave steel cap is anchored by a plurality of first portal-type steel bars, and the first portal-type steel bars are sequentially arranged along the arc-shaped circumference of the segment body.
In one embodiment, the concave steel cap is further anchored by a plurality of V-shaped steel bars, each V-shaped steel bar is welded to two first portal-type steel bars at the outermost side, and the opening direction of each V-shaped steel bar faces to the adjacent circumferential end.
As one embodiment, the tenon portion is connected with a convex steel cap, the convex steel cap is anchored by a plurality of second portal type steel bars, and the second portal type steel bars are sequentially arranged along the arc-shaped circumference of the segment body.
As one embodiment, the tenon part has a circular or oval cross section.
As an example, the tenon portion is tapered from its free end to its other end in the longitudinal direction.
In one embodiment, the steel cap is provided with an elastic liner, and the elastic liner at least covers the surface area of the steel cap for joggling with another shield segment.
The embodiment of the utility model provides a structure is assembled to shield structure section of jurisdiction still relates to, include two section of jurisdiction rings based on unsmooth tenon structure concatenation, in two sections of jurisdiction that unsmooth tenon structure corresponds, at least one of them section of jurisdiction adopts as above the shield structure section of jurisdiction.
The embodiment of the utility model provides a following beneficial effect has at least:
the utility model provides a structure is assembled to shield structure section of jurisdiction and shield structure section of jurisdiction through setting up the steel cap in tenon portion, can improve the ability of shearing of this tenon portion to improve the ability of shearing of shield structure section of jurisdiction/section of jurisdiction ring effectively, and can reduce the damage of the concrete tenon portion that arouses owing to the striking at in-process such as assembling, guarantee shield tunnel construction quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a prior shield segment splicing structure provided in the background art;
fig. 2 is a schematic structural diagram of a shield segment according to a first embodiment of the present invention;
fig. 3 and 4 are schematic diagrams illustrating a tenon side structure of a shield segment according to an embodiment of the present invention;
fig. 5 and 6 are schematic diagrams illustrating a tongue-and-groove side structure of a shield segment according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a shield segment splicing structure provided by the second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
As shown in fig. 2-7, the embodiment of the utility model provides a shield constructs section of jurisdiction, including section of jurisdiction body 100, section of jurisdiction body 100 has two vertical ends and two hoop ends, easily knows, and the so-called vertical end is the tip of this section of jurisdiction body 100 in the tunnel vertical ascending, also is the tip of this section of jurisdiction body 100 self axial ascending, and the so-called hoop end is the tip of this section of jurisdiction body 100 self arc circumference ascending, and vertical end is used for splicing with adjacent section of jurisdiction ring, and the hoop end is used for splicing so that constitute the section of jurisdiction ring with adjacent another section of jurisdiction body 100. One of the longitudinal ends is provided with a tenon portion 102, the other longitudinal end is provided with a tenon portion 101 adapted to the tenon portion 102, when the segment is spliced with an adjacent segment ring, the tenon portion 101 of the segment body 100 is assembled with the tenon portion 102 of a corresponding segment in the adjacent segment ring, or the tenon portion 102 of the segment body 100 is assembled with the tenon portion 101 of a corresponding segment in the adjacent segment ring, which is a conventional technique in the field and is not described herein again.
Further, as shown in fig. 2-7, the tenon 102 and/or the tenon 101 are provided with a steel cap 200, and the steel cap 200 covers at least a partial region of the corresponding tenon. Generally, the mortise and tenon portions 102 and 101 are of a concrete structure; the steel cap 200 may be made of stainless steel or other steel with better weather resistance and corrosion resistance, preferably high strength stainless steel, and the selection of the steel is not exemplified here.
The shield segment that this embodiment provided through set up steel cap 200 in the tenon portion, can improve the ability of shearing of this tenon portion to improve the ability of shearing of shield segment/segment ring effectively, and can reduce the damage of concrete tenon portion because the striking arouses at in-process such as assembling, guarantee shield tunnel construction quality.
Preferably, the steel cap 200 covers the surface of the corresponding tenon portion completely, so that the construction quality is further guaranteed, and the forming of the concrete tenon portion is facilitated.
The cross section of the tenon part 101 can be round, oval or other shapes, such as square or special-shaped structures; obviously, the shape of the mortise and tenon portion 102 is designed accordingly. Further, as shown in fig. 2 and 4, the tenon portion 101 gradually expands from the free end to the other end along the longitudinal direction, so that the tenon matching effect can be improved, and the shearing resistance of the tenon-tenon assembly can be further improved. The shape of the steel cap 200 is preferably identical to the shape of the corresponding tenon portion.
Further, as shown in fig. 3 to 6, the steel cap 200 is anchored to the segment body 100 by anchor bars. Obviously, the anchor bar is disposed within the concrete structure of the segment body 100. By arranging the anchor bars, on one hand, the steel cap 200 is tightly connected with the corresponding tenon part/segment body 100, so that the cooperative stress performance of the steel cap 200 and the corresponding tenon part/segment body 100 is improved, the shear force load is jointly born, and the shear resistance of the tenon part/shield segment/segment ring is further improved; on the other hand, the problem that reinforcing steel bars are not easy to bind and fix at the concave-convex tenon in the prior art can be solved, and the structural strength and rigidity, particularly the shearing resistance, of the corresponding tenon part can be obviously improved.
The number of the tenon 101 and the mortise 102 on the segment body 100 can be determined according to the actual engineering conditions, such as the difference of the tunnel diameter, the block form of the segment ring, and the like. Whether the steel caps 200 are arranged on the tenon part 101 and the mortise part 102 or not can also be determined according to the actual engineering situation, for example, the adjustment is carried out according to the annular seam shearing resistance requirement, specifically, at least the mortise part 102 is designed to be provided with the steel caps 200: when the circumferential shear force is small, the steel cap 200 may be provided only at the rebate 102, and when the circumferential shear force is large, the steel cap 200 may be further provided at the tenon 101.
In addition, the types, the number, the distribution form and the like of the anchor bars can be designed and adjusted according to the actual engineering situation:
in one preferred application example, as shown in fig. 5 and 6, the mortise and tenon portion 102 is connected with a steel concave cap 202, the steel concave cap 202 is anchored by a plurality of first portal-type steel bars 401, and the first portal-type steel bars 401 are sequentially arranged along the arc circumference of the segment body 100. Further, the first portal-type steel bars 401 are welded with the original steel bars 103 of the segment body 100, so that the cooperative stress performance of the steel cap 200 and the segment body 100 is further improved. Further, as shown in fig. 5, the concave steel cap 202 is further anchored by a plurality of V-shaped steel bars 402, each V-shaped steel bar 402 is welded to two outermost first gantry-type steel bars 401, and the opening direction of each V-shaped steel bar is towards the adjacent circumferential end. Through the first portal-type steel bars 401 and the V-shaped steel bars 402, multi-directional stress of the concave steel cap 202 can be realized, and anchoring stability and reliability of the concave steel cap 202 are guaranteed.
In one preferred application example, as shown in fig. 3 and 4, the tenon portion 101 is connected with a convex steel cap 201, the convex steel cap 201 is anchored by a plurality of second portal-type steel bars 403, and the second portal-type steel bars 403 are sequentially arranged along the arc circumference of the segment body 100. For the structure of the tenon portion 101 gradually expanding from the free end to the other end, the frame structure of the second portal frame type steel bar 403 is also designed correspondingly, preferably, it runs along the outer edge surface of the tenon portion 101.
In addition, an elastic gasket 300 is further arranged on the steel cap 200, and the elastic gasket 300 at least covers the surface area of the steel cap 200 for joggling with another shield segment. For the concave steel cap 202, an elastic gasket 300 is arranged on the bottom surface of the concave steel cap; for the above-described male steel cap 201, an elastic cushion 300 is provided on the top surface thereof (i.e., the surface portion away from the segment body 100). The elastic pad 300 is preferably a waterproof gasket, and may be a rubber pad.
The thickness of the steel cap 200, the slope of the sidewall, etc. may be adjusted according to actual engineering requirements and technical specifications of the elastic packing 300.
The manufacturing process of the shield segment roughly comprises the following steps:
1) the arrangement principle of the steel cap 200 is selected according to the segment annular seam shearing resistance requirement. When the circumferential shearing force is small, only the tenon part 102 is additionally provided with the steel cap 200; when the shearing force is large, a steel cap 200 is further additionally arranged on the tenon part 101;
2) pre-processing the steel cap 200, and welding anchor bars on the back of the steel cap 200;
3) the steel cap 200 is fixed at the position of a tenon (a tenon) of the concrete segment mold, other steel bars of the concrete segment are bound, and the concrete segment body 100 is poured.
For further explaining the shield segment provided by the embodiment, the shear resistance of the shield segment and the traditional segment is calculated and contrasted by adopting a finite element analysis method: the results show that under the same load condition, the maximum shear stress borne by the traditional segment is 7406kpa, and the maximum shear stress borne by the shield segment is 5616 kpa. It can be seen that, compare in traditional section of jurisdiction, the shield constructs the section of jurisdiction that this embodiment provided, owing to set up steel cap 200 on tenon portion, the ability of shearing of section of jurisdiction and section of jurisdiction circumferential weld obviously strengthens.
Example two
As fig. 7, the embodiment of the utility model provides a structure is assembled to shield segment still relates to a shield, include two section of jurisdiction rings based on the concatenation of unsmooth tenon structure, in two sections of jurisdiction that unsmooth tenon structure corresponds, at least one of them section of jurisdiction adopts the shield segment that above-mentioned embodiment one provided.
Generally, two segment rings are assembled through a plurality of sets of tenon-and-mortise structures, and preferably, each tenon-and-mortise structure includes the shield segment provided in the first embodiment.
When the segment is assembled and constructed, the tenon parts 101 and the tenon parts 102 of the two segment rings are extruded together through the thrust of the jack of the shield tunneling machine and the bolt fastening force of the segment, the elastic liner 300 is clamped between the tenon parts 101 and the tenon parts 102, the pressure between the tenon parts 101 and the tenon parts 102 can be transmitted, and the shear-resistant reinforced concave-convex tenon structure is formed.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a shield constructs section of jurisdiction, includes the section of jurisdiction body, the section of jurisdiction body has two vertical ends and two hoop ends, one of them vertical end is equipped with mortise portion, another vertical end be equipped with the tenon portion of mortise portion adaptation, its characterized in that: the tenon part and/or the tenon part are/is provided with a steel cap, and the steel cap covers at least partial region of the corresponding tenon part.
2. The shield segment of claim 1, wherein: the steel cap is anchored on the segment body through anchor bars.
3. The shield segment of claim 2, wherein: the concave tenon portion is connected with a concave steel cap, the concave steel cap is anchored through a plurality of first portal type steel bars, and the first portal type steel bars are sequentially arranged along the arc-shaped circumferential direction of the duct piece body.
4. The shield segment of claim 3, wherein: the concave steel cap is further anchored through a plurality of V-shaped steel bars, each V-shaped steel bar is welded with two first portal type steel bars on the outermost side respectively, and the opening direction of each V-shaped steel bar faces to the adjacent annular end respectively.
5. The shield segment of claim 2, wherein: the tenon portion is connected with a convex steel cap, the convex steel cap is anchored through a plurality of second portal frame type steel bars, and the second portal frame type steel bars are sequentially arranged along the arc-shaped circumferential direction of the duct piece body.
6. The shield segment of claim 1, wherein: the cross section of the tenon part is circular or elliptical.
7. The shield segment of claim 6, wherein: the tenon part is gradually expanded from the free end to the other end along the longitudinal direction.
8. The shield segment of claim 1, wherein: and the steel cap is provided with an elastic liner, and the elastic liner at least covers the surface area of the steel cap, which is used for joggling with another shield segment.
9. The utility model provides a structure is assembled to shield constructs section of jurisdiction, includes two section of jurisdiction rings based on tenon and mortise structure concatenation, its characterized in that: at least one of the two segments corresponding to the tenon structure is the shield segment according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920771550.1U CN210460681U (en) | 2019-05-27 | 2019-05-27 | Shield segment and shield segment assembling structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920771550.1U CN210460681U (en) | 2019-05-27 | 2019-05-27 | Shield segment and shield segment assembling structure |
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| CN210460681U true CN210460681U (en) | 2020-05-05 |
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| CN201920771550.1U Active CN210460681U (en) | 2019-05-27 | 2019-05-27 | Shield segment and shield segment assembling structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107312A (en) * | 2019-05-27 | 2019-08-09 | 中铁第四勘察设计院集团有限公司 | Shield duct piece and shield segment assembling structure |
| CN115306430A (en) * | 2022-09-02 | 2022-11-08 | 南通铁建建设构件有限公司 | Embedded pre-buried stress structure for shield tunnel installation |
-
2019
- 2019-05-27 CN CN201920771550.1U patent/CN210460681U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107312A (en) * | 2019-05-27 | 2019-08-09 | 中铁第四勘察设计院集团有限公司 | Shield duct piece and shield segment assembling structure |
| CN110107312B (en) * | 2019-05-27 | 2024-05-17 | 中铁第四勘察设计院集团有限公司 | Shield segment and shield segment assembling structure |
| CN115306430A (en) * | 2022-09-02 | 2022-11-08 | 南通铁建建设构件有限公司 | Embedded pre-buried stress structure for shield tunnel installation |
| CN115306430B (en) * | 2022-09-02 | 2023-10-31 | 南通铁建建设构件有限公司 | Embedded embedded stress structure for shield tunnel installation |
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