CN112095667A - Construction method of shear key for immersed tube tunnel - Google Patents
Construction method of shear key for immersed tube tunnel Download PDFInfo
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- CN112095667A CN112095667A CN202010911598.5A CN202010911598A CN112095667A CN 112095667 A CN112095667 A CN 112095667A CN 202010911598 A CN202010911598 A CN 202010911598A CN 112095667 A CN112095667 A CN 112095667A
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- shear key
- base plate
- plate
- steel shell
- connecting sleeve
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/063—Tunnels submerged into, or built in, open water
- E02D29/073—Tunnels or shuttering therefor assembled from sections individually sunk onto, or laid on, the water-bed, e.g. in a preformed trench
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of tunnel construction, in particular to a construction method of a shear key for a immersed tube tunnel, which comprises the following steps: s1, processing a base plate for mounting the shear key, and welding a connecting sleeve on the base plate; s2, forming a first connecting through hole aligned with the connecting sleeve on an internal partition plate of the tunnel steel shell; s3, enabling one end of the first connecting screw to penetrate through the first connecting through hole and be in threaded connection with one end of the connecting sleeve; s4, forming a second connecting through hole aligned with the connecting sleeve on the shear key; s5, one end of a second connecting screw penetrates through the second connecting through hole to be in threaded connection with the other end of the connecting sleeve, so that one side of the shear key is attached to one side, away from the internal partition plate, of the base plate; s6, checking the gap between the base plate and the shear key; and S7, welding the base plate and the steel shell end sealing plate of the tunnel steel shell. The invention can reduce the installation difficulty of the shear key and reduce the workload.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a construction method of a shear key for a immersed tube tunnel.
Background
The shear key is used for connecting and positioning the joints of the two adjacent sections of immersed tube tunnel steel shells in tunnel construction, the connection of the shear key and the internal partition plate of the tunnel steel shell has high installation requirements on the shear key in the immersed tube tunnel steel shell construction process, and the traditional method is that the shear key is installed after a pipe joint is formed, so that the installation is difficult and the workload is large.
Therefore, a method for constructing a shear key for a immersed tunnel is required to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a construction method of a shear key for a immersed tube tunnel, which can reduce the installation difficulty of the shear key and reduce the workload.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for building a shear key for a immersed tube tunnel comprises the following steps:
s1, processing a base plate for mounting the shear key, and welding a connecting sleeve on the base plate;
s2, forming a first connecting through hole aligned with the connecting sleeve on an internal partition plate of the tunnel steel shell;
s3, enabling one end of the first connecting screw to penetrate through the first connecting through hole and be in threaded connection with one end of the connecting sleeve;
s4, forming a second connecting through hole aligned with the connecting sleeve on the shear key;
s5, one end of a second connecting screw penetrates through the second connecting through hole to be in threaded connection with the other end of the connecting sleeve, so that one side of the shear key is attached to one side, away from the internal partition plate, of the base plate;
s6, checking the gap between the base plate and the shear key;
and S7, welding the base plate and the steel shell end sealing plate of the tunnel steel shell.
Optionally, in step S7, annealing the welding position between the base plate and the steel shell end sealing plate is further required.
Optionally, the first connecting screw and the connecting sleeve are plugged by structural adhesive after being screwed.
Optionally, the base plate and the shear key are subjected to trial assembly after being machined.
Optionally, after the base plate and the shear key are subjected to trial assembly and qualified inspection, the base plate and the shear key are numbered.
Optionally, performing rust prevention treatment on the machined base plate and the machined shear key.
Optionally, a first datum line is scribed on the internal partition, and the base plate is mounted to the steel shell end closure plate with reference to the first datum line.
Optionally, the first connecting screw and the second connecting screw are both straightened, so that the straightness of the first connecting screw and the straightness of the second connecting screw are not greater than 0.5 mm.
Optionally, before welding the connecting sleeve, natural butter is smeared on the connecting sleeve and the threaded hole thereof, and a tool bolt is screwed in the threaded hole for protection.
Optionally, in step S7, after the base plate is welded to the steel shell end sealing plate of the tunnel steel shell, precision measurement needs to be performed.
The invention has the beneficial effects that:
the invention provides a construction method of a shear key for a immersed tube tunnel. Through the mode, the shear keys are matched and installed before the pipe joints are formed, the installation difficulty is reduced, and the workload is reduced.
Drawings
FIG. 1 is a schematic diagram of the construction of a shear key for a immersed tunnel according to the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
In the figure:
1. an internal partition; 11. a first connecting screw; 2. a steel shell end sealing plate; 3. a base plate; 31. a connecting sleeve; 4. a shear key; 41. and the second connecting screw rod.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to reduce the installation difficulty of the shear key and reduce the workload, as shown in fig. 1 and fig. 2, the invention provides a method for constructing a shear key for a immersed tube tunnel, which comprises the following steps:
s1, processing a base plate 3 for mounting the shear key 4, and welding a connecting sleeve 31 on the base plate 3;
s2, forming a first connecting through hole aligned with the connecting sleeve 31 on the internal partition plate 1 of the tunnel steel shell;
s3, threading one end of the first connecting screw 11 through the first connecting through hole to be in threaded connection with one end of the connecting sleeve 31;
s4, forming a second connecting through hole aligned with the connecting sleeve 31 on the shear key 4;
s5, one end of the second connecting screw rod 41 penetrates through the second connecting through hole to be in threaded connection with the other end of the connecting sleeve 31, so that one side of the shear key 4 is attached to one side, away from the inner partition plate 1, of the base plate 3;
s6, checking the gap between the base plate 3 and the shear key 4;
and S7, welding the base plate 3 with the steel shell end sealing plate 2 of the tunnel steel shell.
Through welded connection sleeve 31 on bed plate 3, first connecting screw 11 passes through the first connecting through hole on the inside baffle 1 and the spiro union of bed plate 3, and shear force key 4 passes through second connecting screw 41 and the spiro union of bed plate 3, then welds bed plate 3 and steel casing end shrouding 2, accomplishes the installation of shear force key 4. Through the mode, the shear key 4 is matched and installed before the pipe joint is formed, the installation difficulty is reduced, and the workload is reduced.
Specifically, the machining process of the base plate 3 is as follows:
the base plate 3 is subjected to full blanking cutting → rough machining → machining hole → welding the connecting sleeve 31 → finish machining → positioning the first reference line mark → flaw detection → the connecting sleeve 31 is subjected to close testing vacuum. Wherein, carry out the finish machining through the face to bed plate 3 and shear force key 4 matched with to guarantee that the laminating degree between shear force key 4 and the bed plate 3 satisfies the designing requirement.
Specifically, the machining process of the shear key 4 is as follows:
rough machining of parts of the shear key 4 → assembly welding of the shear key 4 → annealing → fine machining → positioning of a first datum line mark → flaw detection → vacuum density testing. Wherein, carry out the finish machining through the face to bed plate 3 and shear force key 4 matched with to guarantee that the laminating degree between shear force key 4 and the bed plate 3 satisfies the designing requirement.
Further, the machined base plate 3 and the shear key 4 are subjected to rust prevention treatment. The shear keys 4 are protected by using anti-rust oil after being coated, and the base plate 3 is protected by coating the anti-rust oil after being processed. The threaded hole of the connecting sleeve 31 protects the bolt. After the base plate 3 and the shear key 4 are processed, the base plate should be waterproof and rustproof, and should be stacked in a dry place.
Further, in step S7, annealing is performed on the welded position between the base plate 3 and the steel shell end sealing plate 2. Stress existing between the base plate 3 and the steel shell end sealing plate 2 after welding is eliminated, and therefore the mounting position of the shear key 4 meets design requirements.
Optionally, the first connecting screw 11 is screwed with the connecting sleeve 31 and then sealed by using structural adhesive, so as to ensure water tightness between the first connecting screw 11 and the connecting sleeve 31.
Further, the base plate 3 and the shear key 4 are subjected to trial assembly after being machined. After the base plate 3 and the shear key 4 are subjected to trial assembly and qualified inspection, the base plate 3 and the shear key 4 are numbered. The shear key 4 and the base plate 3 need to be matched with each other for entering a field, and are matched with each other for storage, installation and use. Through trying on dress to bed plate 3 and shear force key 4, pair suitable bed plate 3 and shear force key 4 mutually supporting, when guaranteeing follow-up installation, can directly form a complete set and use, reduce the degree of difficulty of assembly.
Further, a first reference line is scribed on the inner partition plate 1, and the base plate 3 is attached to the steel shell end closure plate 2 with reference to the first reference line. During specific installation, the overlap ratio of the base plate 3 and the datum line is adjusted, and the allowable deviation is less than or equal to 1 mm. And the plumb of the base plate 3 is checked by using a plumb bob, and the allowable deviation is less than or equal to 2 mm. The base plate 3 is fixed with the steel shell end sealing plate 2 in a spot welding mode. After the shear keys 4 are installed, the precision measurement among the base plate 3, the shear keys 4 and the datum line is carried out, the allowable tolerance is less than or equal to 3mm, and the base plate 3 and the steel shell end sealing plate 2 are welded after the tolerance is qualified.
Further, the first connecting screw 11 and the second connecting screw 41 are straightened, so that the straightness of the first connecting screw 11 and the straightness of the second connecting screw 41 are not more than 0.5mm, and after the first connecting screw is qualified, the first connecting screw is well protected and then returns to a factory.
Further, before the connecting sleeve 31 is welded, natural butter needs to be smeared on the connecting sleeve 31 and the threaded hole of the connecting sleeve, a tool bolt is screwed in the threaded hole for protection, and the connecting sleeve 31 is guaranteed not to be damaged.
Further, in step S7, the base plate 3 and the steel shell end sealing plate 2 of the tunnel steel shell need to be welded together for precision measurement. And after welding, annealing treatment is carried out, and precision measurement among the base plate 3, the shear key 4 and the datum line is carried out, wherein the allowable tolerance is less than or equal to 3 mm.
The requirements for manufacturing and installing the shear key 4 and the base plate 3 are as follows:
the manufacturing and mounting precision requirements of the shear key 4 are as follows:
manufacturing accuracy requirements of shear key and bed plate
The installation accuracy requirement of the shear key and the base plate
It should be noted that, during installation and subsequent construction, attention is paid to protecting the joint surface between the shear key 4 and the base plate 3, and the joint surfaces of the shear key 4 and the base plate 3 cannot be welded.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A method for building a shear key for a immersed tube tunnel is characterized by comprising the following steps:
s1, processing a base plate (3) for mounting the shear key (4), and welding a connecting sleeve (31) on the base plate (3);
s2, forming a first connecting through hole aligned with the connecting sleeve (31) on the inner partition plate (1) of the tunnel steel shell;
s3, one end of a first connecting screw rod (11) penetrates through the first connecting through hole to be in threaded connection with one end of the connecting sleeve (31);
s4, a second connecting through hole aligned with the connecting sleeve (31) is formed in the shear key (4);
s5, one end of a second connecting screw rod (41) penetrates through the second connecting through hole to be in threaded connection with the other end of the connecting sleeve (31), so that one side of the shear key (4) is attached to one side, away from the inner partition plate (1), of the base plate (3);
s6, checking the gap between the base plate (3) and the shear key (4);
and S7, welding the base plate (3) and the steel shell end sealing plate (2) of the tunnel steel shell.
2. The method for constructing a shear key for a immersed tube tunnel according to claim 1, wherein in step S7, annealing treatment is further performed on the welding position between the base plate (3) and the steel shell end sealing plate (2).
3. The method for constructing the shear key for the immersed tube tunnel according to claim 1, wherein the first connecting screw rod (11) is blocked by structural glue after being screwed with the connecting sleeve (31).
4. The method for constructing the shear key for the immersed tube tunnel according to claim 1, wherein the foundation plate (3) and the shear key (4) are subjected to trial assembly after being processed.
5. The method for building the shear key for the immersed tube tunnel according to claim 1, wherein the base plate (3) and the shear key (4) are numbered after the base plate (3) and the shear key (4) are qualified through trial assembly.
6. The method for constructing a shear key for a immersed tunnel according to claim 1, wherein the fabricated foundation plate (3) and the shear key (4) are subjected to rust prevention treatment.
7. A method of constructing a shear key for a immersed tunnel according to claim 1, wherein a first datum line is scribed on the internal bulkhead (1), and the foundation plate (3) is mounted to the steel shell end closure plate (2) with reference to the first datum line.
8. The method for constructing a shear key for a immersed tube tunnel according to claim 1, wherein the first connecting screw (11) and the second connecting screw (41) are aligned such that the straightness of the first connecting screw (11) and the straightness of the second connecting screw (41) are not greater than 0.5 mm.
9. The method for building the shear key for the immersed tube tunnel according to claim 1, wherein the connecting sleeve (31) and the threaded hole thereof are smeared with natural butter before welding, and a tool bolt is screwed in the threaded hole for protection.
10. The method for constructing a shear key for a immersed tunnel according to claim 1, wherein in the step S7, the accuracy measurement is required after the base plate (3) is welded with the steel shell end sealing plate (2) of the tunnel steel shell.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020108663319 | 2020-08-25 | ||
| CN202010866331 | 2020-08-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112095667A true CN112095667A (en) | 2020-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010911598.5A Pending CN112095667A (en) | 2020-08-25 | 2020-09-02 | Construction method of shear key for immersed tube tunnel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544608A (en) * | 2016-01-27 | 2016-05-04 | 中交公路规划设计院有限公司 | Pipe-joint steel shell and concrete combined structure for immersed tunnel and manufacturing method thereof |
| CN207092133U (en) * | 2017-08-30 | 2018-03-13 | 中交公路规划设计院有限公司 | One kind welding shaped steel shear connector structure |
| CN207419530U (en) * | 2017-08-30 | 2018-05-29 | 中交公路规划设计院有限公司 | A kind of bolt cuts combined shear resistance system |
| US20180274197A1 (en) * | 2017-03-24 | 2018-09-27 | China Communications Construction Company Limited | Final Joint of Immersed Tunnel as well as Prefabrication Method and Installation Method |
| CN208933832U (en) * | 2018-08-20 | 2019-06-04 | 中铁四局集团第五工程有限公司 | Shear connector |
-
2020
- 2020-09-02 CN CN202010911598.5A patent/CN112095667A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544608A (en) * | 2016-01-27 | 2016-05-04 | 中交公路规划设计院有限公司 | Pipe-joint steel shell and concrete combined structure for immersed tunnel and manufacturing method thereof |
| US20180274197A1 (en) * | 2017-03-24 | 2018-09-27 | China Communications Construction Company Limited | Final Joint of Immersed Tunnel as well as Prefabrication Method and Installation Method |
| JP2018162655A (en) * | 2017-03-24 | 2018-10-18 | チャイナ コミュニケーションズ コンストラクション カンパニー リミテッドＣｈｉｎａ Ｃｏｍｍｕｎｉｃａｔｉｏｎｓ Ｃｏｎｓｔｒｕｃｔｉｏｎ Ｃｏｍｐａｎｙ Ｌｉｍｉｔｅｄ | Final joint of immersed tunnel as well as prefabrication method and installation method |
| CN207092133U (en) * | 2017-08-30 | 2018-03-13 | 中交公路规划设计院有限公司 | One kind welding shaped steel shear connector structure |
| CN207419530U (en) * | 2017-08-30 | 2018-05-29 | 中交公路规划设计院有限公司 | A kind of bolt cuts combined shear resistance system |
| CN208933832U (en) * | 2018-08-20 | 2019-06-04 | 中铁四局集团第五工程有限公司 | Shear connector |
Non-Patent Citations (1)
| Title |
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| 罗军明等: "《工程材料及热处理 双色 含微课》", 28 February 2018, 航空工业出版社 * |
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Application publication date: 20201218 |