CN111231104A - Segment prefabrication and sinking process for underwater construction - Google Patents
Segment prefabrication and sinking process for underwater construction Download PDFInfo
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- CN111231104A CN111231104A CN202010050258.8A CN202010050258A CN111231104A CN 111231104 A CN111231104 A CN 111231104A CN 202010050258 A CN202010050258 A CN 202010050258A CN 111231104 A CN111231104 A CN 111231104A
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- 238000010276 construction Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000009417 prefabrication Methods 0.000 title claims abstract description 34
- 230000008569 process Effects 0.000 title description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 239000004567 concrete Substances 0.000 claims abstract description 23
- 238000007667 floating Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 8
- 210000001503 joint Anatomy 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000009415 formwork Methods 0.000 claims description 3
- 238000004078 waterproofing Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 2
- 238000003032 molecular docking Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 102000015097 RNA Splicing Factors Human genes 0.000 description 1
- 108010039259 RNA Splicing Factors Proteins 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/043—Wire anchoring or tensioning means for the reinforcements
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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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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a segment prefabricating and sinking method for underwater construction, which comprises the following steps: segment prefabrication: prefabricating reinforcing steel bars, steel materials and/or concrete in a prefabrication site to obtain prefabricated sections (1) of the reinforcing steel bars, the steel materials and/or the concrete; a pipe section forming step: splicing, butting and tensioning more than two sections of prefabricated sections (1) on a semi-submersible vessel (2) to obtain a single pipe section; sinking and butting pipe joints: the semi-submersible ship (2) is transported to the sinking position by floating and then submerged, a plurality of single pipe joints are sunk, and the single pipe joints are butted underwater to form an underwater structure system. The scheme of the invention can solve the problem of high construction difficulty of the underwater immersed tube and achieve the effect of reducing the construction difficulty of the underwater immersed tube.
Description
Technical Field
The invention belongs to the technical field of underwater construction, particularly relates to a segment prefabrication and sinking process for underwater construction, and particularly relates to a segment prefabrication and sinking construction technology for an underwater bridge.
Background
With the development of global economy and technology, various kinds of land transportation at high speed and across rivers, lakes and straits are increasing. The vacuum pipeline technology is developed in order to meet the requirements of production and life, simultaneously accelerate the construction period, reduce the manufacturing cost and the influence on the surrounding environment, solve the problems of super high-speed shipping and transportation and the like. The main construction processes of the vacuum pipeline include an underwater bridge process, an underwater shield tunnel process, an onshore vacuum pipeline, an onshore vacuum tunnel and the like.
No matter on-land vacuum pipelines, tunnels or underwater vacuum immersed tubes and tunnels are adopted, compared with traditional non-vacuum pipelines and tunnels, the cross sections of the vacuum pipelines and the tunnels are obviously reduced due to the blockage ratio factor, the manufacturing cost is obviously reduced, meanwhile, the shape of the cross section of a tube section is still flexible, and the operation efficiency is greatly improved. Therefore, the vacuum transportation mode has obvious advantages in many cases and becomes the most economical and reasonable ultra-high speed transportation scheme.
However, in the current underwater immersed tube construction, no matter the immersed tube is a steel shell immersed tube or a reinforced concrete immersed tube, the tube section after the manufacturing is finished has huge volume, no matter the immersed tube is transported to a floating transportation area or a sinking area from a prefabrication factory, the requirement on equipment is too high, particularly, a navigation channel may even be required to be opened up in the floating transportation process, and the whole construction efficiency is lower.
Disclosure of Invention
The invention aims to provide a segment prefabrication and sinking method for underwater construction aiming at the defects so as to solve the problem of high construction difficulty of an underwater immersed tube and achieve the effect of reducing the construction difficulty of the underwater immersed tube.
The invention provides a segment prefabricating and sinking method for underwater construction, which comprises the following steps: segment prefabrication: prefabricating reinforcing steel bars, steel materials and/or concrete in a prefabrication site to obtain prefabricated sections of the reinforcing steel bars, the steel materials and/or the concrete; a pipe section forming step: splicing, butting and tensioning more than two sections of prefabricated sections on a semi-submersible ship to obtain a single pipe section; sinking and butting pipe joints: and floating the semi-submersible ship to the water surface of the sinking position, submerging the semi-submersible ship, sinking a plurality of single pipe joints, and carrying out underwater butt joint on the plurality of single pipe joints to form an underwater structure system.
Optionally, the segment prefabricating step specifically includes: after construction, maintenance and demolding of the prefabricated sections of the steel bars, the steel materials and/or the concrete are carried out on the prefabricated site, the semi-submersible ship is started, the semi-submersible ship is driven to a shore loading designated position, the prefabricated sections are hoisted and transported to the semi-submersible ship in groups from the prefabricated site, and the prefabricated sections are transported to the sinking semi-submersible ship.
Optionally, the construction of the prefabricated sections of steel reinforcement, steel and/or concrete at the prefabricated site comprises: and (4) supporting a formwork, binding and hoisting a reinforcement cage, and pouring section concrete.
Optionally, the pipe section forming step specifically includes: and assembling the prefabricated sections, performing waterproof treatment and tensioning treatment on the prestressed pipe bundles on the semi-submersible ship to form the pipe joints for sinking.
Optionally, the waterproofing treatment comprises: waterproof measures are taken between two adjacent sections of prefabricated sections; tensioning treatment of a prestressed tube bundle, comprising: and tensioning the prestressed steel tube bundle pre-embedded in the prefabricated section.
Optionally, the pipe joint sinking and butting step specifically includes: starting the semi-submersible ship again to enable the semi-submersible ship to float to the water surface of the sinking position and then submerge, and enabling the semi-submersible ship to exit from the sinking area in the semi-submersible state; and after the assembled single pipe joints are sunk by means of buoyancy of water and a construction auxiliary guide ship or a construction auxiliary guide platform device, the single pipe joints are assisted to be positioned and kept in a suspended state, and the butt joint among the single pipe joints is realized underwater to form an underwater structure system.
Optionally, the pipe joint sinking and butting step specifically further includes: after the semi-submersible ship is floated to the water surface of the sinking position and submerged, the semi-submersible ship exits from the sinking area in a semi-submersible state so as to participate in a new segment prefabricating step.
Therefore, according to the scheme, the large-volume concrete structure is divided by adopting a segment prefabricating technology and then is transported to the semi-submersible ship in a grouping mode, and segments are butted and assembled on the semi-submersible ship; and the semi-submersible ship is used for directly carrying out pipe joint floating transportation and assisting the pipe joints to sink and butt joint, and the underwater bridge girder erection machine is replaced by the semi-submersible ship, so that the semi-submersible ship integrates the functions of assembling, floating transportation and assisting sinking, the problem of high construction difficulty of underwater immersed pipes is solved, and the effect of reducing the construction difficulty of the underwater immersed pipes is achieved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic view of a prefabricated segment fabrication and sinking process of the segment prefabrication and sinking method for underwater construction of the present invention;
FIG. 2 is a schematic view illustrating a segment prefabrication site manufacturing state of the segment prefabrication and sinking method for underwater construction according to the present invention;
FIG. 3 is a schematic view of a submerged state of a semi-submersible vessel for the segment prefabrication and sinking method for underwater construction of the present invention;
fig. 4 is a schematic view illustrating a pipe joint sinking and butting state according to the segment prefabrication and sinking method for underwater construction of the present invention.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
1-prefabricating a segment; 2-constructing the semi-submersible ship; 3-constructing an auxiliary guide ship or a guide platform and equipment; 4-underwater bridge pier.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
Considering the construction of the underwater immersed tube, a series of engineering problems of high construction difficulty, high construction cost, long construction period, hidden danger of waterproof sealing and the like exist in the whole engineering construction process. The invention at least aims to solve the problem of low construction efficiency of an underwater bridge pipe joint of a vacuum pipeline, provides a scheme capable of efficiently solving the transfer, floating transportation and sinking butt joint of an underwater bridge pipe (tunnel), particularly provides a segment prefabrication and sinking construction process for sinking an underwater pipe joint, relates to the problems of installation and sinking of an underwater pipe (tunnel), is particularly suitable for the design and construction process of a long-distance large-span pipe (tunnel), and can be applied to a vacuum pipeline project.
The invention provides a new underwater bridge pipe joint construction and process, which mainly refers to the construction schemes of the traditional immersed tube tunnel, the bridge and the sea-crossing bridge, fully researches the advantages and disadvantages of each construction scheme, and then carries out innovative design according to the construction environment of the underwater bridge pipe joint. Therefore, the construction cost is reduced, the construction period is shortened, and the safety performance is improved.
According to an embodiment of the present invention, a segment prefabrication and sinking method for underwater construction is provided. Referring to fig. 1 to 4, there are shown schematic structural views of an embodiment of a segment prefabrication and sinking method for underwater construction of the present invention. The segment prefabrication and sinking method for underwater construction may include: the method comprises a segment prefabricating step, a pipe joint forming step and a pipe joint sinking and butting step.
Specifically, as shown in fig. 1 to 3, the scheme of the invention is an underwater bridge pipe section or immersed tube prefabrication and transportation sinking construction process which is formed by a prefabricated section 1, a semi-submersible ship 2 and a guide ship 3.
In an alternative example, the segment prefabrication step: and prefabricating reinforcing steel bars, steel materials and/or concrete on a prefabricating site to obtain the prefabricated sections 1 of the reinforcing steel bars, the steel materials and/or the concrete.
Optionally, the segment prefabricating step may specifically include: after construction, maintenance and demolding of the prefabricated sections 1 made of steel bars, steel materials and/or concrete are carried out on the prefabricated site, the semi-submersible vessel 2 is started, the semi-submersible vessel 2 is driven to a shore loading designated position, the prefabricated sections 1 are hoisted from the prefabricated site and transferred to the semi-submersible vessel 2 in groups, and the prefabricated sections 1 are transferred to the sinking semi-submersible vessel 2.
More optionally, the construction of the precast segment 1 of steel bar, steel material and/or concrete at the precast site may include: and (4) supporting a formwork, binding and hoisting a reinforcement cage, and pouring section concrete.
For example: as shown in fig. 1 and 2, firstly, the reinforced concrete precast segment 1 is constructed at a precast site, and then is transported to the submerged semi-submersible vessel 2 after being maintained and demolded. Specifically, the semi-submersible vessel can be started, the semi-submersible vessel 2 is driven to a shore loading designated position, and the prefabricated sections 1 are hoisted from the prefabricated site and transferred to the semi-submersible vessel 2 in groups.
In an alternative example, the tube section forming step: and (3) splicing, butting and tensioning the more than two sections of prefabricated sections 1 on the semi-submersible vessel 2 to obtain a single pipe joint.
Optionally, the pipe section forming step may specifically include: assembling the prefabricated sections 1, performing waterproof treatment and tensioning treatment on the prestressed pipe bundles on the semi-submersible ship 2 to form pipe joints for sinking.
More optionally, the water-repellent treatment may include: and waterproof measures are taken between two adjacent sections of the prefabricated sections 1.
More optionally, the tensioning treatment of the prestressed pipe bundle may include: and (3) performing tensioning treatment on the prestressed steel tube bundle pre-embedded in the prefabricated section 1.
For example: as shown in fig. 2, the prefabricated segments 1 are spliced and butted on the semi-submersible vessel 2, waterproof measures are taken among the prefabricated segments 1, and finally the prestressed steel tube bundles pre-embedded in the prefabricated segments 1 are tensioned to form a single tube joint.
For example: the prestress tensioning can adopt the existing mature process measures, namely a pre-tensioning method and a post-tensioning method, and the scheme of the invention can adopt the post-tensioning method, for example, after the segments are spliced, the anchors pre-embedded in the segments at two sides are tensioned. The waterproof measures in the scheme of the invention can adopt various underwater segment waterproof measures, such as sealing segments by waterproof rubber strips or pouring concrete and embedding, and the like.
Specifically, the assembly of the prefabricated sections 1, the waterproofing, the tensioning of the prestressed pipe bundles and the like can be performed on the semi-submersible vessel 2, so that pipe joints for sinking are formed.
In an alternative example, the pipe section sinking and butting step comprises the following steps: and floating the semi-submersible ship 2 to the water surface of the sinking position, submerging the semi-submersible ship, sinking a plurality of single pipe joints, and carrying out underwater butt joint on the single pipe joints to form an underwater structure system.
Optionally, the pipe joint sinking and butting step may specifically include: and starting the semi-submersible ship 2 again to enable the semi-submersible ship 2 to float to the water surface of the sinking position and then submerge, and enabling the semi-submersible ship 2 to exit from the sinking area in the semi-submersible state. After the assembled single pipe joints are sunk by means of the buoyancy of water and the construction auxiliary guide ship or the construction auxiliary guide platform equipment 3, the multiple single pipe joints are assisted to be positioned and kept in a suspension state, and the butt joint among the multiple single pipe joints is realized underwater to form an underwater structure system.
Further optionally, the pipe joint sinking and butting step may specifically include: after the semi-submersible vessel 2 is floated to the water surface of the sinking position and submerged, the semi-submersible vessel 2 exits the sinking area in a semi-submerged state to participate in the new segment prefabricating step.
For example: as shown in fig. 3, the semi-submersible vessel 2 can be started again, the semi-submersible vessel 2 is floated to the water surface of the sinking position and then submerged, the assembled pipe joints are sunk and butted underwater by the buoyancy of water and the construction auxiliary guide vessel or the construction auxiliary guide platform device 3, and finally a stable underwater structure system is formed.
Specifically, a semi-submersible ship can be driven, and the pipe joint to be submerged is conveyed to a submerged designated position by the semi-submersible ship; the semi-submersible ship 2 submerges at a submerging designated position, the pipe joints are positioned and kept in a suspended state through construction auxiliary guide platform equipment or an auxiliary guide ship 3, the semi-submersible ship 2 exits from a submerging area in a semi-submerged state, and the guide platform equipment or the guide ship 3 is used for submerging and butting.
For example: auxiliary positioning can be that auxiliary platform or auxiliary ship pass through the anchor rope cable and keep waiting to sink the tube coupling and at appointed position of sinking at the surface of water and under water, and when sinking, the anchor rope slowly extends, and the tube coupling slowly sinks and finally arrives appointed position of sinking into aquatic, and the primary function can be that the pulling force through the anchor rope resists the effort of rivers to the tube coupling.
In the scheme of the invention, the construction mode of the novel underwater bridge section prefabricating scheme solves the engineering problems that large pipe sections are difficult to transport on land, floating operation on water is difficult, sinking operation is limited by a plurality of factors, splicing precision is low and the like; if the transportation problems that the power requirement of consignment equipment is too high, the turning is difficult due to too large equipment, the operation is not flexible and the like in the process of transporting the prefabricated pipe joints to a sinking site due to the large pipe joint volume of the traditional sinking pipe are solved.
In the scheme of the invention, the pipe joints have good continuity, the floating operation mode of directly floating the pipe joints to a sinking area by a construction semi-submersible ship is realized, the later maintenance cost is low, and the operation and maintenance requirements of a pipe (tunnel) are ensured; in the process of sinking and butting, the semi-submersible ship is easy to operate and reduces the sinking difficulty due to the aid of submergence of the semi-submersible ship.
In the scheme of the invention, the traditional construction mode of splicing the prefabricated sections in a prefabricating factory is optimized, the sections are spliced on the construction semi-submersible ship, and the utilization rate and the construction efficiency of the construction semi-submersible ship are improved; and the new construction process shortens the construction period, improves the construction efficiency, the safety and the like.
The scheme of the invention mainly has the advantages that implementation measures of difficult manufacturing and transportation and difficult sinking and positioning of the underwater immersed tube or the underwater bridge pipe section are solved; the construction cost is controlled, the construction time is short, the efficiency is high, the standard is unified, the space utilization rate is high, the safety and the reliability are realized, the manufacturing cost is reduced, and the like.
In the scheme of the invention, the application field of the pipe (tunnel) is not limited to the underwater bridge shown in fig. 1 to 4, and the method is also suitable for construction modes of various underwater pipe joints (such as underwater immersed pipes); the pipe (tunnel) is not limited to reinforced concrete, and is also applicable to materials such as steel pipe and steel pipe concrete.
Therefore, the scheme of the invention adopts a new prefabricated assembly form, a floating transportation mode and a sinking mode, breaks the whole into parts, overcomes the defects of inflexibility, overhigh requirements on equipment and power and the like caused by overlarge mass in the prior art, adopts a segment prefabrication technology to divide a large-volume concrete structure and then transport the divided large-volume concrete structure to a semi-submersible ship in groups, and carries out butt joint assembly on segments on the semi-submersible ship; and the semi-submersible ship is used for directly carrying out pipe joint floating transportation and assisting the pipe joints to sink and butt joint, and the underwater bridge girder erection machine is replaced by the semi-submersible ship, so that the semi-submersible ship integrates the functions of assembling, floating transportation and assisting sinking, and the performances such as construction scheme, quality, space utilization rate and the like are greatly improved.
In addition, all the pipe joints formed by splicing the prefabricated sections 1 by the semi-submersible vessel 2 are sunk and butted through construction auxiliary guiding, and the protection scope of the scheme of the invention is included. Any modifications, variations and equivalents of the above-described embodiments according to the principles of the present invention are within the scope of the present invention.
Through a large number of tests, the technical scheme of the invention is adopted, a large-volume concrete structure is divided by adopting a segment prefabrication technology and then is transported to a semi-submersible ship in groups, and segments are butted and assembled on the semi-submersible ship; and the semi-submersible ship is used for directly carrying out pipe joint floating transportation and assisting the pipe joints to sink and butt joint, and the underwater bridge girder erection machine is replaced by the semi-submersible ship, so that the semi-submersible ship integrates the functions of assembling, floating transportation and assisting sinking, the problem of high construction difficulty of underwater immersed pipes is solved, and the effect of reducing the construction difficulty of the underwater immersed pipes is achieved.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. A segment prefabrication and sinking method for underwater construction, comprising:
segment prefabrication: prefabricating reinforcing steel bars, steel materials and/or concrete in a prefabrication site to obtain prefabricated sections (1) of the reinforcing steel bars, the steel materials and/or the concrete;
a pipe section forming step: splicing, butting and tensioning more than two sections of prefabricated sections (1) on a semi-submersible vessel (2) to obtain a single pipe section;
sinking and butting pipe joints: the semi-submersible ship (2) is transported to the sinking position by floating and then submerged, a plurality of single pipe joints are sunk, and the single pipe joints are butted underwater to form an underwater structure system.
2. The segment prefabrication and submerging method for underwater construction according to claim 1, wherein the segment prefabrication step specifically includes:
after construction, maintenance and demolding of the prefabricated sections (1) made of steel bars, steel materials and/or concrete are carried out on a prefabricated site, the semi-submersible ship (2) is started, the semi-submersible ship (2) is driven to a shoreside loading designated position, the prefabricated sections (1) are hoisted from the prefabricated site and transferred to the semi-submersible ship (2) in groups, and the prefabricated sections (1) are transferred to the sinking semi-submersible ship (2).
3. Segment prefabrication and sinking method for underwater construction according to claim 2, characterised in that the construction of prefabricated segments (1) of steel reinforcement, steel and/or concrete is carried out at a prefabrication site, comprising:
and (4) supporting a formwork, binding and hoisting a reinforcement cage, and pouring section concrete.
4. Segment prefabrication and sinking method for underwater construction according to any one of claims 1 to 3, characterised in that the tube segment forming step, in particular comprises:
assembling the prefabricated sections (1), performing waterproof treatment and tensioning treatment of the prestressed pipe bundles on the semi-submersible ship (2) to form the pipe joints for sinking.
5. Segment prefabrication and submerging method for underwater construction according to claim 4, wherein the waterproofing treatment comprises: waterproof measures are taken between two adjacent sections of prefabricated sections (1);
tensioning treatment of a prestressed tube bundle, comprising: and (3) tensioning the prestressed steel tube bundle pre-embedded in the prefabricated segment (1).
6. Segment prefabrication and sinking method for underwater construction according to any one of claims 1 to 5, characterised in that the tube segment sinking and docking step specifically comprises:
starting the semi-submersible ship (2) again to enable the semi-submersible ship (2) to float to the water surface of the sinking position and then submerge, and enabling the semi-submersible ship (2) to exit from the sinking area in the semi-submersible state;
and after the assembled single pipe joints are sunk by means of buoyancy of water and a construction auxiliary guide ship or a construction auxiliary guide platform device (3), the single pipe joints are assisted to be positioned and kept in a suspension state, and the butt joint among the single pipe joints is realized underwater to form an underwater structure system.
7. The segment prefabrication and sinking method for underwater construction according to claim 6, wherein the pipe segment sinking and butting step specifically further comprises:
after the semi-submersible ship (2) is transported to the submerged position by floating and submerged, the semi-submersible ship (2) exits the submerged area in a semi-submerged state to participate in a new segment prefabricating step.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113789813A (en) * | 2021-08-25 | 2021-12-14 | 广州市市政工程设计研究总院有限公司 | An underwater tunnel construction method |
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| CN113789813A (en) * | 2021-08-25 | 2021-12-14 | 广州市市政工程设计研究总院有限公司 | An underwater tunnel construction method |
| CN113789813B (en) * | 2021-08-25 | 2023-03-07 | 广州市市政工程设计研究总院有限公司 | Underwater tunnel construction method |
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