CN113123807B - Shield segment connecting device with deformable retainer rings and using method thereof - Google Patents
Shield segment connecting device with deformable retainer rings and using method thereof Download PDFInfo
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- CN113123807B CN113123807B CN202110274572.9A CN202110274572A CN113123807B CN 113123807 B CN113123807 B CN 113123807B CN 202110274572 A CN202110274572 A CN 202110274572A CN 113123807 B CN113123807 B CN 113123807B
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- retainer ring
- connecting plug
- deformable
- embedded part
- deformable retainer
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to a shield segment connecting device with deformable retaining rings and a using method thereof, and the shield segment connecting device comprises a connecting plug, the deformable retaining rings and a joint embedded part, wherein pre-embedded holes which are mutually matched are formed in the to-be-connected surfaces of two adjacent shield segments, the joint embedded part is respectively embedded in the pre-embedded holes of the two shield segments, the deformable retaining rings are arranged in the joint embedded part, the connecting plug comprises two heads which can be inserted into the joint embedded part, and when the head of the connecting plug is inserted into the joint embedded part, the deformable retaining rings are sleeved on the connecting plug to fix the connecting plug in the joint embedded part; when two shield segments are connected, one head of the connecting plug is inserted into the joint embedded part of one shield segment, and the other head of the connecting plug is inserted into the joint embedded part of the other shield segment.
Description
Technical Field
The invention relates to the technical field of shield tunnel structures, civil construction and mechanical engineering, in particular to a shield segment connecting device with deformable check rings and a using method thereof.
Background
In recent years, as the problem of urban traffic congestion becomes more and more serious, more and more cities start to build subway projects. The shield machine has small influence on the environment, has the characteristics of low construction labor intensity, high construction speed, low cost, suitability for construction in urban areas and dense buildings and the like, so that the shield machine is in the leading position in urban subway engineering construction and becomes an indispensable general tunnel construction technology. The shield tunnel construction is one of the main construction technologies of subway tunnels and utility tunnels, the assembly of shield segments is an important link in the shield tunnel construction, and the shield tunnel construction increasingly pursues the construction targets of higher efficiency, higher quality, higher safety and higher speed.
Arc bolts are mostly adopted for inter-ring connection of shield segments in the traditional shield tunnel, deformation is easy, manufacturing of special arc bolt holes is usually troublesome in the construction process, and the arc bolts need to be locked manually after installation, so that a large amount of time and labor are consumed in the process; in addition, the traditional arc bolt connection method has short service life and poor connection tightness, and the problems of connection failure, segment cracking, tunnel water seepage and the like are easy to occur in the later operation process of the shield tunnel; in addition, due to the joint structure characteristics, the rigidity of the joint of the shield segment is much higher than that of the shield segment main body, and under the action of load, concrete cracking of the segment caused by stress concentration often occurs at the joint of the segment.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the shield segment connecting device with the deformable retainer ring, which has the advantages of simple structure, high reliability and convenience in operation, and the using method thereof.
The purpose of the invention can be realized by the following technical scheme:
a shield segment connecting device with deformable retaining rings is used for connecting two adjacent shield segments and is characterized by comprising a connecting plug, the deformable retaining rings and connector embedded parts, wherein embedded holes which are matched with each other are formed in the surfaces to be connected of the two adjacent shield segments;
before two shield segments are connected, one head part of the connecting plug is inserted into the joint embedded part of one shield segment; when two shield segments are connected, the other head of the connecting plug is inserted into a joint embedded part of the other shield segment; after the two shield segments are connected, the two heads of the connecting plug are respectively inserted into the joint embedded parts of the two adjacent shield segments.
Furthermore, the deformable retainer ring comprises an elastic ring and a plurality of retainer ring single bodies with the same structural size, the retainer ring single bodies are sequentially arranged along the circumferential direction to form a round deformable retainer ring, the elastic ring is sleeved on the outer circumferential surface of the deformable retainer ring, the head of the connecting plug is a cylindrical head, the end part of the connecting plug is provided with a conical expansion surface, and the middle of the connecting plug is provided with a groove;
in the process that the head of the connecting plug is inserted into the joint embedded part, the deformable retainer ring firstly contacts the conical expansion surface and expands along sliding, then enters the groove and is sleeved on the groove through contraction of the elastic ring, and the inner ring and the outer ring of the deformable retainer ring respectively clamp the connecting plug and the joint embedded part to fix the connecting plug in the joint embedded part.
Further preferably, the diameter of the outer end face of the conical expansion surface is smaller than the inner diameter of the deformable retainer ring when the deformable retainer ring is contracted, the diameter of the inner end face is the same as the diameter of the cylindrical head, the diameter of the groove part opened in the head of the connecting plug is equal to the inner diameter of the deformable retainer ring when the deformable retainer ring is contracted, and the length of the groove part is larger than the length of the deformable retainer ring.
Furthermore, the connecting plug also comprises a positioning boss arranged between the two heads, and the diameter of the positioning boss is larger than that of the cylindrical head.
Furthermore, the inside of the joint embedded part is sequentially provided with a mounting hole, a retaining ring groove and a positioning hole which are communicated with each other, the mounting hole is matched with the conical expansion surface, the positioning hole is matched with the positioning boss, the deformable retaining ring is arranged in the retaining ring groove, the inner ring of the deformable retaining ring clamps the inner wall of the groove, the outer ring clamps the inner wall of the retaining ring groove, and the connecting plug is fixed in the joint embedded part.
Further preferably, the length of the deformable retainer ring is larger than the difference between the inner diameter and the outer diameter of the deformable retainer ring.
Further preferably, the diameter of the part, provided with the retaining ring groove, of the joint embedded part is larger than the maximum outer diameter of the deformable retaining ring after being unfolded.
Further preferably, the outer circumferential surface of the retainer ring monomer is provided with an arc-shaped groove, an annular groove capable of deforming the outer circumferential surface of the retainer ring is formed by enclosing, and the elastic ring is arranged in the annular groove.
The use method of the shield segment connecting device with the deformable retainer ring comprises the following steps:
1) placing the deformable check ring in the joint embedded part, and pouring the joint embedded part in the pre-buried holes of the shield segments in advance;
2) inserting the head of one end of the connecting plug into a joint embedded part of the shield segment until the connecting plug is fixed in the joint embedded part by the deformable retainer ring;
3) aligning the connecting plug of the shield segment inserted into the connecting plug with the joint embedded part of the shield segment adjacent to the connecting plug by using a manipulator;
4) pushing the adjacent shield segments by using a hydraulic cylinder, and inserting the head of the other end of the connecting plug into the adjacent shield segments until the connecting plug is fixed in the joint embedded part by using the deformable check ring;
5) and two adjacent shield segments are contacted with each other to complete connection.
Further, in the step 2) and the step 4), in the process that the head of the connecting plug is inserted into the joint embedded part of the shield segment, the method specifically comprises the following steps:
the deformable retainer ring is in contact with the conical expansion surface, deforms and expands along the conical expansion surface under the pushing of the connecting plug, then enters the groove, is sleeved on the groove through the contraction of the elastic ring, and finally the inner ring and the outer ring of the deformable retainer ring clamp the connecting plug and the joint embedded part respectively to fix the connecting plug in the joint embedded part.
Compared with the prior art, the invention has the following advantages:
the invention provides a shield segment connecting device with deformable retainer rings, which is used for solving the problems and greatly improving the installation efficiency of shield segments.
1) Simple structure, simple to operate: the shield installation structure only comprises three parts, namely the connecting plug, the deformable retainer ring and the joint embedded part, is low in production cost, suitable for mass production, simple in installation mode, capable of realizing connection only by inserting the connecting plug, greatly improving the installation efficiency, improving the shield construction speed and wide in application range;
2) the reliability is good: the shield segment connecting device is provided with the connecting plug, the deformable retainer ring and the connector embedded part, the connector embedded part is embedded in the shield segment, the connecting plug is fixed in the connector embedded part through the deformable retainer ring, and the connecting part has good compression resistance, tensile resistance and bending resistance;
3) the operation is simple and convenient: the deformable retainer ring is easy to expand, the diameter of the outer end face circle of the conical expansion surface is smaller than the inner diameter of the deformable retainer ring, the deformable retainer ring can be directly inserted into a joint embedded part by using smaller force through matching with the conical expansion surface, and the deformable retainer ring can be self-locked on the groove under the constraint of the elastic ring after the connecting plug is inserted without additional operation;
4) the centering accuracy is high: according to the invention, the connecting plug is provided with the positioning boss which is matched with the positioning hole of the joint embedded part, so that the centering accuracy of the joint can be ensured.
Drawings
FIG. 1 is a schematic view of a connection principle of a shield segment connection device with deformable retainer rings according to the present invention;
FIG. 2 is a schematic view of a deformable retainer ring according to the present invention;
FIG. 3 is a schematic view of a retainer ring single body structure of the deformable retainer ring of the present invention;
FIG. 4 is a schematic view of the structure of the connecting plug of the present invention;
FIG. 5 is a schematic view of a joint embedment structure of the present invention;
FIG. 6 is a schematic structural view of the present invention during installation, prior to insertion of a connector plug into a fitting;
FIG. 7 is a schematic view of the configuration of the present invention with the deformable retainer ring deployed by the advancement of the connector plug;
FIG. 8 is a schematic view of the construction of the joint when the installation of the present invention is completed;
FIG. 9 is a partial cross-sectional view of adjacent shield segments between blocks after installation of a shield segment coupling arrangement of the present invention in which the retainer ring is deformable;
wherein: 1. the connecting plug comprises a connecting plug body, a conical expansion surface, a connecting plug body, a connecting plug, 2, a deformable retaining ring, a connector, a.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Examples
As shown in fig. 1 and 9, the invention provides a shield segment connecting device with deformable check rings, which is used for connecting two adjacent shield segments 4, and comprises a connecting plug 1, deformable check rings 2 and joint embedded parts 3, wherein embedded holes 5 which are matched with each other are formed on the surfaces to be connected of the two adjacent shield segments 4, the joint embedded parts 3 are respectively embedded in the embedded holes 5 of the two shield segments 4, the deformable check rings 2 are arranged in the joint embedded parts 3, the connecting plug 1 comprises two heads with opposite directions and can be inserted in the joint embedded parts 3, and when the heads of the connecting plug 1 are inserted in the joint embedded parts 3, the deformable check rings 2 are sleeved on the connecting plug 1, and the connecting plug 1 is fixed in the joint embedded parts 3.
As shown in fig. 2-4, the deformable retainer ring 2 includes an elastic ring and a plurality of retainer ring monomers 2a with the same structural size, the plurality of retainer ring monomers 2a are sequentially arranged along the circumferential direction to form a circular deformable retainer ring 2, the elastic ring is sleeved on the outer circumferential surface of the deformable retainer ring 2, the head of the connector plug 1 is a cylindrical head, the end of the connector plug is provided with a conical expansion surface 1a, and the middle of the connector plug is provided with a groove 1 b. The connecting plug 1 further comprises a positioning boss 1c arranged between the two heads, the diameter of the positioning boss 1c is larger than that of the cylindrical head, an arc-shaped groove is formed in the outer peripheral surface of the retainer ring monomer 2a, an annular groove capable of being deformed to surround the outer peripheral surface of the retainer ring 2 is formed, and the elastic ring is arranged in the annular groove.
As shown in fig. 5, a mounting hole 3a, a retainer groove 3b and a positioning hole 3c which are communicated with each other are sequentially formed in the joint embedded part 3, the mounting hole 3a and the tapered extension surface 1a are matched with each other, the positioning hole 3c and the positioning boss 1c are matched with each other, the deformable retainer 2 is arranged in the retainer groove 3b, the inner wall of the groove 1b is clamped by the inner ring, the inner wall of the retainer groove 3b is clamped by the outer ring, and the connecting plug 1 is fixed in the joint embedded part 3.
Connector embedded part 3 is pre-buried in the embedded hole 5 of two adjacent shield segments 4 between the piece, but flexible retaining ring 2 is placed in the retaining ring groove 3b of connector embedded part 3, insert connecting plug 1 in the connector embedded part 3, can make flexible retaining ring 2 receive connecting plug 1 effect to expand along toper extension face 1a, when inserting to flexible retaining ring 2 entering recess 1b, but flexible retaining ring 2 contracts on recess 1b under the restraint of elastic ring, block in recess 1b completely until flexible retaining ring 2, realize the connection of shield segments.
In this embodiment, it is preferable that the diameter of the groove 1b on the connection plug is equal to the inner diameter of the deformable retainer ring 2, the length of the groove 1b is slightly greater than the length of the deformable retainer ring 2, the diameter of the circle of the outer end face of the tapered expanding surface 1a is smaller than the inner diameter of the deformable retainer ring 2, the length of the deformable retainer ring 2 is greater than the difference between the inner diameter and the outer diameter of the deformable retainer ring 2, and the diameter of the retainer ring groove 3b is slightly greater than the maximum outer diameter of the deformable retainer ring 2 after being unfolded.
As shown in fig. 1, 6-9, the method for using the shield segment connecting device with deformable retainer rings comprises the following steps:
1) placing the deformable retainer ring 2 in the joint embedded part 3, and pouring the joint embedded part 3 in the pre-buried holes 5 of the shield segments 4 in advance, specifically, placing the deformable retainer ring 2 in the retainer ring groove 3b of the joint embedded part 3, and pouring the joint embedded part 3 in the pre-buried holes 5 of the shield segments 4 in advance;
2) inserting the head of one end of the connecting plug 1 into a joint embedded part 3 of the shield segment 4 until the deformable retainer ring 2 fixes the connecting plug 1 into the joint embedded part 3, as shown in fig. 1;
3) aligning the connecting plug 1 of the shield segment 4 inserted into the connecting plug 1 with the joint embedded part 3 of the shield segment 4 adjacent to the connecting plug by using a manipulator, as shown in FIG. 6;
4) pushing the adjacent shield segment 4 by using a hydraulic cylinder, inserting the head at the other end of the connecting plug 1 into the adjacent shield segment 4 until the deformable retainer ring 2 fixes the connecting plug 1 in the joint embedded part 3, specifically, as shown in fig. 7, in the process that the head of the connecting plug 1 is inserted into the joint embedded part 3, firstly, the deformable retainer ring 2 contacts the conical expansion surface 1a, deforms and expands along the conical expansion surface 1a under the pushing of the connecting plug 1, then enters the groove 1b, and is sleeved on the groove 1b through the contraction of the elastic ring, and finally, the inner ring and the outer ring of the deformable retainer ring 2 respectively clamp the connecting plug 1 and the joint embedded part 3, and the connecting plug 1 is fixed in the joint embedded part 3;
5) two adjacent shield segments 4 contact each other to complete connection, specifically, the hydraulic cylinder pushes the shield segments 4 to the positioning bosses 1c to completely enter the positioning holes 3c of the two shield segments 4, and at the moment, the deformable retainer ring 2 automatically contracts on the connecting joint groove 1b under the contraction force of the elastic ring to complete installation, as shown in fig. 8 and 9.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A shield segment connecting device with deformable retainer rings is used for connecting two adjacent shield segments (4), it is characterized by comprising a connecting plug (1), a deformable retainer ring (2) and a joint embedded part (3), wherein the surfaces to be connected of two adjacent shield segments (4) are provided with embedded holes (5) which are matched with each other, the joint embedded parts (3) are respectively embedded in the embedded holes (5) of the two shield segments (4), the deformable retainer ring (2) is arranged in the joint embedded part (3), the connecting plug (1) comprises two heads with opposite directions, and the two heads can be inserted into the joint embedded part (3), and when the head part of the connecting plug (1) is inserted into the joint embedded part (3), the deformable retainer ring (2) is sleeved on the connecting plug (1) to fix the connecting plug (1) in the joint embedded part (3);
the deformable retainer ring (2) comprises an elastic ring and a plurality of retainer ring single bodies (2a) with the same structural size, the plurality of retainer ring single bodies (2a) are sequentially arranged along the circumferential direction to form a round deformable retainer ring (2), the elastic ring is sleeved on the outer circumferential surface of the deformable retainer ring (2), the head of the connecting plug (1) is a cylindrical head, the end part of the connecting plug is provided with a conical expansion surface (1a), and the middle of the connecting plug is provided with a groove (1 b);
in the process that the head of the connecting plug (1) is inserted into the joint embedded part (3), the deformable retainer ring (2) firstly contacts the conical expansion surface (1a) and expands along sliding, then enters the groove (1b) and is sleeved on the groove (1b) through contraction of the elastic ring, the inner ring and the outer ring of the deformable retainer ring (2) respectively clamp the connecting plug (1) and the joint embedded part (3), and the connecting plug (1) is fixed in the joint embedded part (3);
before two shield segments (4) are connected, one head of the connecting plug (1) is inserted into the joint embedded part (3) of one shield segment (4); when two shield segments (4) are connected, the other head of the connecting plug (1) is inserted into the joint embedded part (3) of the other shield segment (4); after the two shield segments (4) are connected, the two heads of the connecting plug (1) are respectively inserted into the joint embedded parts (3) of the two adjacent shield segments (4).
2. A shield segment connecting device of a retainer ring deformable type according to claim 1, characterized in that the diameter of the outer end surface of the conical expansion surface (1a) is smaller than the inner diameter of the deformable retainer ring (2) when it is contracted, the diameter of the inner end surface is the same as the diameter of the cylindrical head, the diameter of the portion of the connecting plug (1) where the recess (1b) is opened is equal to the inner diameter of the deformable retainer ring (2) when it is contracted, and the length is longer than the length of the deformable retainer ring (2).
3. The shield segment connecting device with the deformable retainer ring of claim 1, wherein the connecting plug (1) further comprises a positioning boss (1c) arranged between the two heads, and the diameter of the positioning boss (1c) is larger than that of the cylindrical head.
4. The shield segment connecting device with the deformable retainer ring according to claim 3, wherein a mounting hole (3a), a retainer ring groove (3b) and a positioning hole (3c) which are communicated with each other are sequentially formed in the joint embedded part (3), the mounting hole (3a) and the conical expansion surface (1a) are matched with each other, the positioning hole (3c) and the positioning boss (1c) are matched with each other, the deformable retainer ring (2) is arranged in the retainer ring groove (3b), the inner ring of the deformable retainer ring clamps the inner wall of the groove (1b), the outer ring clamps the inner wall of the retainer ring groove (3b), and the connecting plug (1) is fixed in the joint embedded part (3).
5. A shield segment connecting device of a retainer ring deformable type according to claim 1, characterized in that the length of the deformable retainer ring (2) is greater than the difference between the inner diameter and the outer diameter of the deformable retainer ring (2).
6. The shield segment connecting device with the deformable retainer ring according to claim 4, wherein the diameter of the part of the joint embedded part (3) provided with the retainer ring groove (3b) is larger than the maximum outer diameter of the deformable retainer ring (2) after being unfolded.
7. The shield segment connecting device with the deformable retainer ring according to claim 1, wherein an arc-shaped groove is formed in the outer peripheral surface of the retainer ring single body (2a) to form an annular groove in the outer peripheral surface of the deformable retainer ring (2), and the elastic ring is arranged in the annular groove.
8. A method of using the shield segment connection apparatus of the retainer ring-deformable type according to any one of claims 2 to 7, comprising the steps of:
1) placing the deformable retainer ring (2) in the joint embedded part (3), and pouring the joint embedded part (3) in the embedded hole (5) of each shield segment (4) in advance;
2) inserting the head of one end of the connecting plug (1) into a joint embedded part (3) of the shield segment (4) until the connecting plug (1) is fixed in the joint embedded part (3) by the deformable retainer ring (2);
3) centering the connecting plug (1) of the shield segment (4) inserted into the connecting plug (1) and the joint embedded part (3) of the shield segment (4) adjacent to the connecting plug by using a manipulator;
4) pushing the adjacent shield segment (4) by using a hydraulic cylinder, inserting the head of the other end of the connecting plug (1) into the adjacent shield segment (4) until the connecting plug (1) is fixed in the joint embedded part (3) by the deformable retainer ring (2);
5) two adjacent shield segments (4) are contacted with each other to complete the connection.
9. The use method of the shield segment connecting device with the deformable retainer ring according to claim 8, wherein in the step 2) and the step 4), the process of inserting the head of the connecting plug (1) into the joint embedded part (3) of the shield segment (4) specifically comprises the following steps:
the connecting plug comprises a connecting plug (1), a deformable retainer ring (2), a connecting plug (1), a groove (1b), an elastic ring, a connector embedded part (3), a tapered expansion surface (1a), a deformable retainer ring (2), a connecting plug (1), a connector embedded part (3) and a connecting plug (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110274572.9A CN113123807B (en) | 2021-03-15 | 2021-03-15 | Shield segment connecting device with deformable retainer rings and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110274572.9A CN113123807B (en) | 2021-03-15 | 2021-03-15 | Shield segment connecting device with deformable retainer rings and using method thereof |
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| Publication Number | Publication Date |
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| CN113123807A CN113123807A (en) | 2021-07-16 |
| CN113123807B true CN113123807B (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110274572.9A Active CN113123807B (en) | 2021-03-15 | 2021-03-15 | Shield segment connecting device with deformable retainer rings and using method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507924A (en) * | 2015-12-28 | 2016-04-20 | 上海建工集团股份有限公司 | Segment circular seam connection component, tunnel segment structure and construction method |
| CN107143350A (en) * | 2017-06-16 | 2017-09-08 | 天津大学 | Shield tunnel straightway liner structure rigidity gear driven type stiffening device |
| KR20180009546A (en) * | 2016-07-19 | 2018-01-29 | 주식회사 케이씨산업 | Sehment for tunnel |
| CN110608050A (en) * | 2019-09-26 | 2019-12-24 | 江苏大成轨道科技有限公司 | Axial self-locking connecting assembly for shield tunnel segment |
| CN110761806A (en) * | 2019-10-29 | 2020-02-07 | 华中科技大学 | Segment structure with horizontal pin type mortise and tenon joint and push-press fastening type joint connecting assembly |
| CN210217770U (en) * | 2019-07-19 | 2020-03-31 | 衡水益通管业股份有限公司 | Duct piece capable of being assembled quickly |
-
2021
- 2021-03-15 CN CN202110274572.9A patent/CN113123807B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507924A (en) * | 2015-12-28 | 2016-04-20 | 上海建工集团股份有限公司 | Segment circular seam connection component, tunnel segment structure and construction method |
| KR20180009546A (en) * | 2016-07-19 | 2018-01-29 | 주식회사 케이씨산업 | Sehment for tunnel |
| CN107143350A (en) * | 2017-06-16 | 2017-09-08 | 天津大学 | Shield tunnel straightway liner structure rigidity gear driven type stiffening device |
| CN210217770U (en) * | 2019-07-19 | 2020-03-31 | 衡水益通管业股份有限公司 | Duct piece capable of being assembled quickly |
| CN110608050A (en) * | 2019-09-26 | 2019-12-24 | 江苏大成轨道科技有限公司 | Axial self-locking connecting assembly for shield tunnel segment |
| CN110761806A (en) * | 2019-10-29 | 2020-02-07 | 华中科技大学 | Segment structure with horizontal pin type mortise and tenon joint and push-press fastening type joint connecting assembly |
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| CN113123807A (en) | 2021-07-16 |
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