CN113833026A - Construction method of flexible anti-seismic joint of immersed tunnel - Google Patents
Construction method of flexible anti-seismic joint of immersed tunnel Download PDFInfo
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- CN113833026A CN113833026A CN202111067337.0A CN202111067337A CN113833026A CN 113833026 A CN113833026 A CN 113833026A CN 202111067337 A CN202111067337 A CN 202111067337A CN 113833026 A CN113833026 A CN 113833026A
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- Prior art keywords
- pipe
- immersed
- pipe section
- immersed tube
- sections
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Classifications
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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
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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
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
Abstract
The invention provides a construction method of a flexible anti-seismic joint of a immersed tube tunnel, and relates to the technical field of engineering construction. The construction method of the flexible anti-seismic joint of the immersed tunnel comprises the following specific steps: s1, firstly, accurately measuring an immersed tube foundation trench dredged and dug by a river bottom, repeatedly determining the flatness, the gradient and the size width of each position of the foundation trench, and ensuring that an immersed tube section can be accurately immersed into a specified installation position in the process of immersed tube; s2, the pipe section subjected to watertight detection is transported in a floating mode by using a floating pontoon, and after the floating pontoon reaches the designated position, the floating pontoon operator can accurately position the immersed pipe position of the pipe section again according to positioning information sent by an underwater diver. Through adopting flexible cable wire to connect fixedly to the pipe section to come through the pressure of waterproof pad and waterproof circle and carry out the sealed processing to connecting portion, both can ensure the fastness and the stability of pipe section connection, also can realize high-quality sealed processing simultaneously, prevent the condition of seepage.
Description
Technical Field
The invention relates to the technical field of engineering construction, in particular to a construction method of a flexible anti-seismic joint of an immersed tube tunnel.
Background
The immersed tube tunnel of the HongZhu Australia bridge is a first open sea immersed tube tunnel constructed in China, also is the longest road immersed tube tunnel and the only deeply buried immersed tube tunnel in the world, and the joint design and processing technology is one of key technologies of the immersed tube tunnel; the design of the joint can bear temperature change, earthquake force and other effects and ensure good water tightness, each pipe section of the immersed tunnel is a prefabricated part, and joints are arranged between the pipe sections and the ventilation tower and have two forms, namely a rigid joint which has section rigidity and strength similar to those of the pipe sections connected with the rigid joint; flexible joints, which allow relative displacement in 3 principal axis directions. In some cases all joints of the sinking tunnel take the same form, in other cases both forms may be used. The position, spacing and form of the joints should be determined according to soil conditions, foundation form, seismic resistance and workability; at the same time, the strength, deformation properties, water resistance, materials and details of the joint should also be considered.
The construction of the flexible anti-seismic joint of the immersed tube tunnel is an important part in the construction of the immersed tube tunnel, and is different from the rigid joint of the immersed tube tunnel, the construction of the flexible anti-seismic joint not only needs to ensure the stability and the firmness of connection, but also has high requirements on the waterproofness, the sealing performance and the anti-seismic performance of the connection, and once the connection is unstable or seepage occurs in the butt joint construction process, the tunnel is easily caused to have large potential safety hazards in the subsequent use process.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a construction method of a flexible anti-seismic joint of a immersed tunnel, which solves the problems that the construction of the flexible anti-seismic joint needs to ensure the stability and the firmness of connection, simultaneously has extremely high requirements on the waterproofness, the sealing performance and the anti-seismic performance of the connection, and once the connection is unstable or the leakage occurs in the butt joint construction process, the tunnel has larger potential safety hazard in the subsequent use process.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the construction method of the flexible anti-seismic joint of the immersed tunnel comprises the following specific steps:
s1, firstly, accurately measuring an immersed tube foundation trench dredged and dug by a river bottom, repeatedly determining the flatness, the gradient and the size width of each position of the foundation trench, and ensuring that an immersed tube section can be accurately immersed into a specified installation position in the process of immersed tube;
s2, carrying out floating transportation on the pipe section subjected to the watertight detection by using a floating pontoon, accurately positioning the immersed pipe position of the pipe section again by using floating pontoon operating personnel according to positioning information sent by an underwater diver after the floating pontoon reaches a designated position, and slowly injecting water into the pipe section after the positioning is finished, so that the pipe section overcomes buoyancy by using the self gravity and slowly carries out immersed pipe work;
s3, after the pipe sections sink to the designated installation positions, the butt joint ends of the pipe sections of the sinking pipes are butted and limited with the nose support part of the previous pipe section, after the butt joint is completed, the steel cable flexible connection modules between the two pipe sections are connected and fixed, and then a waterproof pad and a waterproof ring are respectively installed between the contact ends of the two pipe sections;
s4, after the waterproof pad and the waterproof ring are installed, the pull cables on two sides of the top of the sinking pipe section are pulled with the previous pipe section, hydraulic force is used for over-compression joint, the waterproof pad and the waterproof ring are guaranteed to be clamped, and therefore butt joint work between the sinking pipe section and the previous pipe section is completed;
s5, winding a high-toughness water stop belt at the connecting part between the two end pipe sections after the two pipe sections are butted, and bonding and fixing the tail end of the high-toughness water stop belt by using high-strength sealant after winding is finished;
s6, respectively sleeving customized hoops on two sides of the high-toughness water stop belt at the butt joint part of the two sections of pipe sections, locking and fixing the two sections of pipe sections by using locking bolts, thus completing butt joint and external sealing treatment of the pipe sections, and backfilling sandy soil in the foundation trench by using backfilling equipment;
and S7, after the immersed tube tunnels are completely butted, carrying out corresponding conventional waterproof sealing treatment on the inner sides of the connecting parts of the tube sections.
Preferably, in S2, in the process of floating the pipe section by using the floating vessel, the steel cable is used to pull and position each corner of the pipe section, so that the pipe section is stable in the floating process, and the steel cable is used to pull and position each corner of the pipe section, so that the pipe section is conveniently pulled out of the detection area by using the steel cable, thereby avoiding instability of the floating vessel in pulling.
Preferably, when the pipe section is in immersed tube in S2, the lowering speed and lowering amount of immersed tube steel cables at two ends of the floating pontoon are controlled by the floating pontoon operator according to the position of the pipe section and the inclination angle information sent by an underwater diver, the lowering speed and lowering amount of the immersed tube steel cables at two ends of the floating pontoon are controlled by the floating pontoon operator according to the position of the pipe section and the inclination angle information sent by the underwater diver, so that the pipe section can be ensured to be stable in the sinking process, and large deviation can not occur, thereby facilitating subsequent accurate butt joint.
Preferably, waterproof pad and waterproof circle are all fixed respectively in the week side of two sections pipeline section butt joint ends through the multiunit fixing bolt, through utilizing multiunit fixing bolt to fix respectively in the week side of two sections pipeline section butt joint ends, both conveniently carry out quick installation fixed, also can guarantee the fastness of connection simultaneously, and the installation work of waterproof pad and waterproof circle also can be gone on before the pipeline section butt joint simultaneously, connects work for convenient carrying on fast, can install corresponding waterproof pad and waterproof circle in appointed position before the pipeline section butt joint.
Preferably, the width of the high-toughness water stop band in S5 is 2-2.5m, and the high-toughness water stop band with the width of 2-2.5m can fully cover the butt joint part of the two segments of pipe sections.
Preferably, the winding number of the high-toughness water stop band in the S5 is 2-3, and the high-toughness water stop band is wound for 2-3 circles, so that the connection tightness can be ensured, and the overall service life of the high-toughness water stop band can be prolonged.
Preferably, in S6, when the backfilling device is used to backfill sand into the foundation trench, the bottom of the pipe segment needs to be filled with sand, so as to ensure the bottom of the pipe segment is filled stably, and the sand filling is performed on the bottom of the pipe segment, so that the overall stability and shock resistance of the pipe segment can be greatly enhanced.
(III) advantageous effects
The invention provides a construction method of a flexible anti-seismic joint of a immersed tube tunnel. The method has the following beneficial effects:
1. according to the construction method of the flexible anti-seismic joint of the immersed tunnel, the high-toughness water stop belt is arranged on the outer side of the connecting part of the connecting pipe section, so that the connecting pipe section can be further sealed from the outer side, and the overall waterproof sealing efficiency is greatly improved.
2. According to the construction method of the flexible anti-seismic joint of the immersed tube tunnel, the tube sections are fixedly connected through the flexible steel cable, and the connecting parts are subjected to sealing treatment through the pressing of the waterproof pad and the waterproof ring, so that the firmness and the stability of the connection of the tube sections can be ensured, high-quality sealing treatment can be realized, and the leakage condition is prevented.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
the embodiment of the invention provides a construction method of a flexible anti-seismic joint of a immersed tube tunnel, which comprises the following specific steps:
s1, firstly, accurately measuring an immersed tube foundation trench dredged and dug by a river bottom, repeatedly determining the flatness, the gradient and the size width of each position of the foundation trench, and ensuring that an immersed tube section can be accurately immersed into a specified installation position in the process of immersed tube;
s2, the pipe section subjected to watertight detection is transported in a floating mode by using a floating pontoon, each corner of the pipe section needs to be dragged and positioned by using a steel cable in the pipe section floating mode by using the floating pontoon, so that the pipe section is kept stable in the floating mode, the pipe section subjected to floating transportation is conveniently dragged out of a detection area by using the steel cable, the instability of the dragging of the floating pontoon is avoided, after the floating pontoon reaches a designated position, a floating pontoon operator can accurately position the immersed pipe position of the pipe section again according to positioning information sent by an underwater diver, after the positioning is finished, the pipe section is slowly filled with water into the pipe section, the buoyancy is overcome by using the self gravity of the pipe section, the immersed pipe work is slowly carried out, the floating pontoon operator needs to control the lowering speed and lowering amount of the immersed pipe steel cables at two ends of the floating pontoon according to the pipe section position and inclination angle information sent by the underwater diver, and the floating pontoon operator controls the lowering speed of the immersed pipe steel cables at two ends of the floating pontoon according to the pipe section position and inclination angle information sent by the underwater diver so as to lower the lowering the immersed pipe position and inclination angle information of the immersed pipe section The lowering amount ensures that the pipe section can be kept stable in the sinking process and does not have large offset;
s3, after the pipe sections sink to the appointed installation positions, the butt joint ends of the pipe sections of the immersed pipes are butted and limited with the nose support part of the previous pipe section, after the butt joint is completed, the steel cable flexible connection modules between the two pipe sections are connected and fixed, then the waterproof pad and the waterproof ring are respectively installed between the contact ends of the two pipe sections, the waterproof pad and the waterproof ring are respectively fixed on the peripheral sides of the butt joint ends of the two pipe sections through a plurality of groups of fixing bolts, and in order to facilitate and quickly carry out the butt joint work, the corresponding waterproof pad and the waterproof ring can be firstly installed at the appointed positions before the pipe sections are butted;
s4, after the waterproof pad and the waterproof ring are installed, the pull cables on two sides of the top of the sinking pipe section are pulled with the previous pipe section, hydraulic force is used for over-compression joint, the waterproof pad and the waterproof ring are guaranteed to be clamped, and therefore butt joint work between the sinking pipe section and the previous pipe section is completed;
s5, after the two sections of pipe sections are butted, winding a high-toughness water stop belt at the connecting part between the two end pipe sections, wherein the high-toughness water stop belt with the width of 2-2.5m can fully cover the butted part of the two sections of pipe sections, winding 2-3 circles by using the high-toughness water stop belt to ensure the connection tightness, and after the winding is finished, bonding and fixing the tail end of the high-toughness water stop belt by using high-strength sealant;
s6, respectively sleeving customized hoops on two sides of the high-toughness water stop belt at the butt joint part of the two sections of pipe sections, and locking and fixing the two sides by using locking bolts, so that butt joint and external sealing treatment of the pipe sections are completed, sand and soil are backfilled in the foundation trench by using backfilling equipment, the bottom of the pipe sections are required to be filled with sand and soil during backfilling, the bottom of the pipe sections is ensured to be filled stably, and meanwhile, the overall stability and the shock resistance of the pipe sections can be greatly enhanced;
and S7, after the immersed tube tunnels are completely butted, carrying out corresponding conventional waterproof sealing treatment on the inner sides of the connecting parts of the tube sections.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The construction method of the flexible anti-seismic joint of the immersed tunnel is characterized by comprising the following steps: the method comprises the following specific steps:
s1, firstly, accurately measuring an immersed tube foundation trench dredged and dug by a river bottom, repeatedly determining the flatness, the gradient and the size width of each position of the foundation trench, and ensuring that an immersed tube section can be accurately immersed into a specified installation position in the process of immersed tube;
s2, carrying out floating transportation on the pipe section subjected to the watertight detection by using a floating pontoon, accurately positioning the immersed pipe position of the pipe section again by using floating pontoon operating personnel according to positioning information sent by an underwater diver after the floating pontoon reaches a designated position, and slowly injecting water into the pipe section after the positioning is finished, so that the pipe section overcomes buoyancy by using the self gravity and slowly carries out immersed pipe work;
s3, after the pipe sections sink to the designated installation positions, the butt joint ends of the pipe sections of the sinking pipes are butted and limited with the nose support part of the previous pipe section, after the butt joint is completed, the steel cable flexible connection modules between the two pipe sections are connected and fixed, and then a waterproof pad and a waterproof ring are respectively installed between the contact ends of the two pipe sections;
s4, after the waterproof pad and the waterproof ring are installed, the pull cables on two sides of the top of the sinking pipe section are pulled with the previous pipe section, hydraulic force is used for over-compression joint, the waterproof pad and the waterproof ring are guaranteed to be clamped, and therefore butt joint work between the sinking pipe section and the previous pipe section is completed;
s5, winding a high-toughness water stop belt at the connecting part between the two end pipe sections after the two pipe sections are butted, and bonding and fixing the tail end of the high-toughness water stop belt by using high-strength sealant after winding is finished;
s6, respectively sleeving customized hoops on two sides of the high-toughness water stop belt at the butt joint part of the two sections of pipe sections, locking and fixing the two sections of pipe sections by using locking bolts, thus completing butt joint and external sealing treatment of the pipe sections, and backfilling sandy soil in the foundation trench by using backfilling equipment;
and S7, after the immersed tube tunnels are completely butted, carrying out corresponding conventional waterproof sealing treatment on the inner sides of the connecting parts of the tube sections.
2. The construction method of the flexible anti-seismic joint of the immersed tube tunnel according to claim 1, wherein: in S2, during the floating transportation of the pipe sections by the vessel, the steel cables are used to pull and position the corners of the pipe sections so that they are stable during the floating transportation.
3. The construction method of the flexible anti-seismic joint of the immersed tube tunnel according to claim 1, wherein: when the pipe section in the S2 is immersed in the pipe, the floating pontoon operator needs to control the lowering speed and lowering amount of the immersed tube steel cables at the two ends of the floating pontoon according to the position and inclination angle information of the pipe section sent by the underwater diver.
4. The construction method of the flexible anti-seismic joint of the immersed tube tunnel according to claim 1, wherein: the waterproof pad and the waterproof ring are respectively fixed on the periphery of the butt joint ends of the two sections of pipe sections through a plurality of groups of fixing bolts, and meanwhile, the installation work of the waterproof pad and the waterproof ring can also be carried out before the pipe sections are in butt joint.
5. The construction method of the flexible anti-seismic joint of the immersed tube tunnel according to claim 1, wherein: the width of the high-toughness water stop band in the S5 is 2-2.5 m.
6. The construction method of the flexible anti-seismic joint of the immersed tube tunnel according to claim 1, wherein: and the winding turns of the high-toughness water stop belt in the S5 range from 2 to 3.
7. The construction method of the flexible anti-seismic joint of the immersed tube tunnel according to claim 1, wherein: in the step S6, when the backfilling device is used to backfill sand into the foundation trench, the bottom of the pipe segment needs to be filled with sand, so as to ensure the bottom of the pipe segment to be filled stably.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111067337.0A CN113833026A (en) | 2021-09-13 | 2021-09-13 | Construction method of flexible anti-seismic joint of immersed tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111067337.0A CN113833026A (en) | 2021-09-13 | 2021-09-13 | Construction method of flexible anti-seismic joint of immersed tunnel |
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| CN113833026A true CN113833026A (en) | 2021-12-24 |
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| CN202111067337.0A Pending CN113833026A (en) | 2021-09-13 | 2021-09-13 | Construction method of flexible anti-seismic joint of immersed tunnel |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1233904C (en) * | 2002-08-27 | 2005-12-28 | 上海隧道工程股份有限公司 | Construction process of flexible shockproof joint for deposited pipe tunnel |
| CN103321247A (en) * | 2013-06-06 | 2013-09-25 | 中铁隧道勘测设计院有限公司 | Adjustable, detachable and reusable nose support guiding device and method of immersed tube tunnel |
| CN103741717A (en) * | 2014-01-09 | 2014-04-23 | 北京工业大学 | Immersed tunnel flexible joint |
| 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 |
| US10253904B1 (en) * | 2017-11-03 | 2019-04-09 | Cccc Highway Consultants Co., Ltd. | Integrated immersed tube coupling and installation method thereof as well as installation closure method of immersed tube coupling |
| CN210395684U (en) * | 2019-08-06 | 2020-04-24 | 中化二建集团有限公司 | Composite connection structure of rubber water stop |
-
2021
- 2021-09-13 CN CN202111067337.0A patent/CN113833026A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1233904C (en) * | 2002-08-27 | 2005-12-28 | 上海隧道工程股份有限公司 | Construction process of flexible shockproof joint for deposited pipe tunnel |
| CN103321247A (en) * | 2013-06-06 | 2013-09-25 | 中铁隧道勘测设计院有限公司 | Adjustable, detachable and reusable nose support guiding device and method of immersed tube tunnel |
| CN103741717A (en) * | 2014-01-09 | 2014-04-23 | 北京工业大学 | Immersed tunnel flexible joint |
| 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 |
| US10253904B1 (en) * | 2017-11-03 | 2019-04-09 | Cccc Highway Consultants Co., Ltd. | Integrated immersed tube coupling and installation method thereof as well as installation closure method of immersed tube coupling |
| CN210395684U (en) * | 2019-08-06 | 2020-04-24 | 中化二建集团有限公司 | Composite connection structure of rubber water stop |
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Application publication date: 20211224 |