CN118223525A - Construction method of submarine steel shell immersed tube tunnel - Google Patents
Construction method of submarine steel shell immersed tube tunnel Download PDFInfo
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- CN118223525A CN118223525A CN202410497778.1A CN202410497778A CN118223525A CN 118223525 A CN118223525 A CN 118223525A CN 202410497778 A CN202410497778 A CN 202410497778A CN 118223525 A CN118223525 A CN 118223525A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 242
- 239000010959 steel Substances 0.000 title claims abstract description 242
- 238000010276 construction Methods 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000013535 sea water Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 210000001503 joint Anatomy 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 8
- 238000007667 floating Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000005536 corrosion prevention Methods 0.000 claims 1
- 238000004904 shortening Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 23
- 238000005266 casting Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
A construction method of a submarine steel shell immersed tube tunnel belongs to the technical field of submarine tunnel construction. The method comprises the steps of manufacturing a steel shell immersed tube joint, constructing a tunnel foundation and installing the steel shell immersed tube joint; the manufacturing of the steel shell immersed tube joint comprises the following steps: manufacturing steel shell pipe joints in shipyards or tunnel docks, wherein steel shell pipe joint water inlet pipe valves are arranged on the side parts of the steel shell pipe joints, steel shell pipe joint air outlet pipe valves are arranged on the upper parts of the steel shell pipe joints, and concrete pouring holes and concrete pouring air exhaust holes are formed in the upper surfaces of the steel shell pipe joints; a water stop is arranged on the end face of one end of the steel shell pipe joint; installing steel plate end sealing doors at pipe joint cavity openings at two ends of a steel shell pipe joint; opening a lock to a shipyard dock or a tunnel dock for draining water; or sliding the steel shell pipe joint into water through a slipway; hauling the steel shell pipe joint to a construction site dock for berthing; the sea water of the wharf at the construction site is used as a construction platform for manufacturing the steel shell pipe joint to be sunk, so that the steel shell pipe joint floats on the sea surface. The advantages are that: saving resources, shortening construction period and greatly reducing engineering cost and engineering investment.
Description
Technical Field
The invention belongs to the technical field of submarine tunnel construction, and particularly relates to a construction method of a submarine steel shell immersed tube tunnel.
Background
Submarine tunnels have advantages that are not limited to: the urban distance is shortened, two cities can be directly connected, and the detour of land traffic is avoided; the traffic efficiency is improved, and the transportation means can be quickly and directly transported to the destination by a submarine tunnel or submarine pipeline mode, so that congestion and traffic accidents in land traffic are avoided; the traffic capacity is increased, and the submarine tunnel can obviously improve the traffic capacity among cities in a multi-tunnel mode so as to meet the ever-increasing traffic demands; the method has the advantages that the economic culture communication among cities is promoted, the two cities can be directly connected by the construction of the submarine tunnel, the economic connection and trade business between the cities are effectively promoted, and the culture communication and travel business between the cities are also facilitated; the submarine tunnel is not affected by weather, can pass all weather, and is not affected by severe weather such as wind, rain, snow and fog compared with an offshore bridge, so that the continuous uninterrupted traffic is ensured; the navigation is not damaged and the landscape is not affected; land resources can be free or less occupied, migration can be significantly reduced, and so forth.
Technical information related to a construction method of a submarine immersed tube tunnel, such as CN103692550B (a method for casting submarine tunnel immersed tube), CN115288175B (a method for casting gallery in steel-shell concrete immersed tube section), CN111877402a (a method for constructing immersed tube tunnel section), and the like, which are rare and systematic in the published middle-outer patent literature. A typical immersed tube tunnel and method of construction is recommended as CN108239999B, which focuses on the process of making an immersed tube, but does not suggest how to lay it on the seabed.
At present, a steel shell immersed tube joint is usually manufactured on a special platform, and then a series of subsequent procedures are carried out, and as one section or unit of steel shell immersed tube joint weighs tens of thousands of tons or even hundreds of thousands of tons, huge capital is required to be spent on designing and building the special platform for manufacturing the steel shell immersed tube joint.
Disclosure of Invention
The invention aims to provide a construction method of a submarine steel shell immersed tube tunnel, which can overcome the defects of the prior art, is beneficial to saving resources, greatly shortening the engineering construction period and reducing the engineering cost.
The invention aims to achieve the task, namely a construction method of a submarine steel shell immersed tube tunnel, which comprises the steps of manufacturing a steel shell immersed tube section, constructing a tunnel foundation and installing the steel shell immersed tube section;
The manufacturing of the steel shell immersed tube joint comprises the following steps of:
A) Manufacturing a steel shell pipe joint at a shipyard dock (including a shipway) or a tunnel dock, arranging a steel shell pipe joint water inlet pipe valve for injecting water into a steel shell pipe joint cavity of the steel shell pipe joint at the side part of the steel shell pipe joint in the length direction, arranging a steel shell pipe joint air outlet pipe valve for discharging air in the steel shell pipe joint cavity at the upper part of the steel shell pipe joint in the length direction, arranging concrete pouring holes and concrete pouring exhaust holes on the upper surface of the steel shell pipe joint at intervals, wherein the concrete pouring holes and the concrete pouring exhaust holes are communicated with a clamping cavity of the steel shell pipe joint, and carrying out anti-corrosion treatment on the inner surface and the outer surface of the steel shell pipe joint;
B) A water stop is arranged on the end face of one end of the steel shell pipe joint;
C) Installing steel plate end sealing doors at pipe joint cavity openings at two ends of a steel shell pipe joint;
D) The lock is opened to drain water for a shipyard dock or a tunnel dock, so that the steel shell pipe joint slowly floats upwards; or sliding the steel shell pipe joint into water through a slipway;
e) Hauling the steel shell pipe joint to a construction site dock for berthing;
F) The sea water of the wharf on the construction site is used as a construction platform for manufacturing the steel shell pipe sections to be sunk, so that the steel shell pipe sections are floated on the sea surface, high-fluidity self-compaction concrete is poured into the clamping cavities of the steel shell pipe sections by means of the concrete pouring holes in the step A), the steel shell pipe sections to be sunk are obtained, the dead weight of the steel shell pipe sections to be sunk is smaller than the buoyancy of the steel shell pipe sections to be sunk, and the required number of steel shell pipe sections to be sunk are continuously manufactured in the same manner for standby;
The tunnel foundation construction comprises the following steps:
a) Excavating a tunnel foundation trench along the middle line of the submarine steel shell immersed tube tunnel;
b) Performing foundation construction on the tunnel foundation trench to obtain a immersed tube joint foundation;
The method for installing the steel shell immersed tube joint comprises the following steps of:
1) Floating the steel shell pipe section to be immersed obtained in the step F) to the sea surface position corresponding to the position above the immersed pipe section foundation obtained in the step b);
2) Hanging a pipe section of the steel shell to be immersed by a ship crane;
3) Opening the steel shell pipe section water inlet pipe valve and the steel shell pipe section exhaust pipe valve in the step A), enabling seawater to enter the steel shell pipe section cavity through the steel shell pipe section water inlet pipe valve, closing the steel shell pipe section water inlet pipe valve and closing the steel shell pipe section exhaust pipe valve when the sum of the self weights of the seawater entering the steel shell pipe section cavity and the steel shell pipe section to be submerged is larger than seawater buoyancy, and enabling the steel shell pipe section to be submerged to slowly sink to the immersed pipe section foundation in the step b) under the condition of being suspended by a ship to obtain the steel shell immersed pipe section;
4) The position of the steel shell immersed tube joint in the step 3) is adjusted through a ship crane, so that the installation of the first steel shell immersed tube joint is completed;
5) Backfilling, locking and ballasting protection, namely backfilling a locking layer in a space between two sides of the steel shell immersed tube joint in the length direction and the tunnel base groove in the step a), and covering a ballasting protection layer on the upper surface of the steel shell immersed tube joint in the length direction;
6) Repeating the steps 1), 2) and 3), completing butt joint of the subsequent steel shell immersed tube sections and the first steel shell immersed tube section installed previously through a ship crane through a pull-in device, connecting the two adjacent steel shell immersed tube sections end to end through a tube section connecting piece after the butt joint is completed, and repeating the steps 1), 2) and 3) until the installation of all the steel shell immersed tube sections is completed;
7) Dismantling steel plate end sealing doors at two ends of the steel shell immersed tube joint in the step C), removing water in the cavity of the steel shell immersed tube joint, outfitting, and additionally arranging an inner water stop belt at the inner side of the steel shell immersed tube joint to obtain the submarine steel shell immersed tube tunnel.
In a specific embodiment of the present invention, the anticorrosion treatment in step a) refers to coating the outer surface of the steel shell pipe joint with a 3PE anticorrosion layer, where the 3PE anticorrosion layer is a three-layer polyethylene anticorrosion coating; and sintering epoxy powder on the inner surface of the steel shell pipe joint in a sintering mode.
In another specific embodiment of the present invention, the water stop in step B) is a GIAN water stop; the inner water stop in the step 7) is an OMEGA water stop.
In a further specific embodiment of the invention, the immersed tube joint base described in step b) is a gravel blanket.
In yet another specific embodiment of the present invention, the locking layer in step 5) is a gravel or gravel backfill locking layer and the ballast protection layer is a monolithic or gravel over-coating concrete protection layer.
In a further specific embodiment of the invention, safety channels are arranged at intervals in the length direction of each steel shell pipe section of the submarine steel shell immersed tube tunnel in the step 7) and formed by the steel shell pipe sections.
The technical scheme provided by the invention has the technical effects that: the steel shell pipe joint is manufactured by a shipyard or a tunnel dock, the steel shell pipe joint floats on the sea surface by taking the sea water of a wharf at a construction site as a construction platform, and high-fluidity self-compaction concrete is poured into the steel shell pipe joint, so that the defects in the prior art are overcome, the resource is saved, the construction period is shortened, and the engineering cost and the engineering investment are greatly reduced.
Drawings
FIG. 1 is a schematic diagram of a submarine steel shell immersed tube tunnel obtained by the construction method of the invention;
FIG. 2a is a schematic view of the steel shell pipe section of FIG. 1 in a state to be immersed;
FIG. 2b is a cross-sectional view of FIG. 2 a;
Fig. 3 is a cross-sectional view A-A of fig. 1.
Detailed Description
Example 1:
Referring to fig. 1 to 3, the sea depth for this embodiment is 35 meters, the tunnel surface is 37.4 meters below the sea surface, and the steel shell pipe joint 4 is: 200×40×10.5 m, two-way six-lane highway submarine steel shell immersed tunnel 1, steel shell tube section 4 dead weight 12000 tons, steel plate end seal doors 47 at two ends of steel shell tube section 4 are 60 tons, total concrete amount in clamping cavity 45 is 28317m 3, space of steel shell tube section 4 in sea is 81336m 3, lumen space 51490m 3 of steel shell tube section 4, outfitting weight is 3812 tons, immersed tube section foundation 5 is 1.5m thick gravels cushion layer, tunnel foundation groove 6 backfills locking layer 7 is gravels, ballast protective layer 8 is 1.9 m thick gravels+0.5 m thick C30 concrete.
The related art data (or parameters) and construction organization design data of this embodiment are as follows:
1. The buoyancy and dead weight of the steel shell pipe section 4 (the steel shell immersed pipe section is essentially) of the submarine steel shell immersed pipe tunnel 1 are as follows:
buoyancy: ffloat= 81336 ×1.03=83776 tons; self weight: wfrom=12000+60+28317×2.4=80021 tons;
2. the floating draft of the pipe joint to be immersed is as follows: hfortune=80021/[ (40×200-4×3.33) ×1.03] =9.37 meters;
3. taking the effects of ocean currents and stable sinking into consideration: weight of water intake +wself=1.07F float
Water inflow in the steel shell pipe joint cavity 41: v= (83776 x 1.07-80021)/1.03=9339m 3
4. The selection (2) of ship cranes, the load of each ship crane is:
(9339 x 1.03+80021-83776)/2=2932 tons, considering the situation under the complex power system of wave ocean current, two 8000 tons of ship cranes should be adopted to meet the requirement of sinking the submarine steel shell immersed tube joints under the complex environment.
The construction method of the submarine steel shell immersed tube tunnel 1 comprises the steps of manufacturing steel shell immersed tube sections, constructing tunnel foundations and installing the steel shell immersed tube sections;
The manufacturing of the steel shell immersed tube joint comprises the following steps of:
A) The shipyard dock (including the slipway) or make steel shell pipe section 4 in the tunnel dock, be provided with the steel shell pipe section intake pipe valve 42 that is used for to the steel shell pipe section intracavity 41 of steel shell pipe section 4 in the lateral part interval of length direction of steel shell pipe section 4, be provided with the steel shell pipe section exhaust pipe valve 43 that is used for discharging the air in the steel shell pipe section intracavity 41 of steel shell pipe section 4 and be provided with concrete placement hole 44a and concrete placement exhaust hole 44b at the upper surface interval of length direction of steel shell pipe section 4 at the upper portion interval of length direction of steel shell pipe section 4, steel shell pipe section intake pipe valve 42 and steel shell pipe section exhaust pipe valve 43 all communicate with each other with steel shell pipe section intracavity 41 of steel shell pipe section 4, and concrete placement hole 44a and concrete placement exhaust hole 44b communicate with the clamp chamber 45 of steel shell pipe section 4 to carry out the anticorrosive treatment of interior and exterior surface, specifically: coating a 3PE anticorrosive coating on the outer surface of the steel shell pipe joint 4, wherein the 3PE anticorrosive coating is a three-layer structure polyethylene anticorrosive coating, and sintering epoxy powder on the inner surface of the steel shell pipe joint 4 in a sintering manner;
B) A water stop 46 is arranged on the end face of one end of the steel shell pipe joint 4, and the water stop 46 is a GIAN water stop;
C) The steel plate end sealing doors 47 are arranged at the pipe joint cavity openings at the two ends of the steel shell pipe joint 4, the number of the steel plate end sealing doors 47 is preferably divided into three as shown in fig. 2a, and each steel plate end sealing door 47 is designed into a group (a plurality) of mutually sealed and embedded steel plate end sealing doors for subsequent disassembly and assembly;
D) The dock is opened to drain water (if a tunnel dock is adopted, the tunnel dock is opened to drain water), so that the steel shell pipe joint 4 slowly floats upwards and is in a semi-submerged state in the sea water 3 relative to the sea surface 2 shown in fig. 2 a;
e) Hauling the steel shell pipe joint 4 to a construction site dock for berthing;
F) The sea water 3 of a wharf on the construction site is taken as a construction platform for manufacturing a steel shell pipe section to be sunk, the steel shell pipe section 4 floats on the sea surface 2 in the semi-submerged (semi-floating and semi-sinking) state, 28317m 3 of high-fluidity self-compaction concrete is poured into a clamping cavity 45 of the steel shell pipe section 4 by means of the concrete pouring holes 44a in the step A), and in the pouring process, air in the clamping cavity 45 is discharged to the outside through the concrete pouring exhaust holes 44b, so that the steel shell pipe section to be sunk is obtained, the dead weight of the steel shell pipe section to be sunk is smaller than the buoyancy of the steel shell pipe section to be sunk, and the required number of steel shell pipe sections to be sunk are manufactured in the same way for standby;
The tunnel foundation construction comprises the following steps:
a) Excavating a tunnel foundation trench 6 along the central line of the submarine steel shell immersed tube tunnel 1 by shipborne dredger equipment;
b) Performing foundation construction on the tunnel foundation trench 6 to obtain a immersed tube joint foundation 5, wherein the immersed tube joint foundation 5 is a 1500mm thick broken stone cushion layer, and is flattened and compacted;
The method for installing the steel shell immersed tube joint comprises the following steps of:
1) Floating the steel shell pipe section to be immersed obtained in the step F) to a sea surface 2 position (shown in figure 2 b) corresponding to the position above the immersed pipe section foundation 5 (shown in figure 3) obtained in the step b);
2) Two ship cranes are used for hanging a pipe joint of a steel shell to be immersed, each 8000 tons of the two ship cranes are used for hanging four points;
3) Opening the steel shell pipe section water inlet pipe valve 42 and the steel shell pipe section exhaust valve 43 in the step A), injecting seawater 9339m 3 into the steel shell pipe section cavity 41 of the steel shell pipe section 4 through the steel shell pipe section water inlet pipe valve 42, slowly sinking the pipe section to be sinking on the pipe section foundation 5 in the step b) in a ship hanging state to obtain a steel shell pipe section sinking specifically shown in fig. 3;
4) The position of the steel shell immersed tube joint in the step 3) is adjusted through a ship crane, so that the installation of the first steel shell immersed tube joint is completed;
5) Backfilling and locking ballast protection, namely backfilling a locking layer 7 in a space between two sides of the length direction of the steel shell immersed tube joint and the tunnel foundation trench 6 in the step a), and covering 1.9 m thick slab stone and 0.5m thick concrete on the upper surface of the length direction of the steel shell immersed tube joint as a ballast protection layer 8, wherein the locking layer 7 is a sand stone or broken stone locking layer, and the ballast protection layer 8 is a concrete protection layer covered on a slab stone or a concrete protection layer covered on a sand stone;
6) Repeating the steps 1), 2) and 3), completing the butt joint of the subsequent steel shell immersed tube joint and the previously installed first steel shell immersed tube joint through a pull-in device by a ship crane, connecting the head and the tail of the two adjacent steel shell immersed tube joints through a tube joint connecting piece 9 after the butt joint is completed, and repeating the steps 1), 2) and 3) until the installation of all the steel shell immersed tube joints is completed, wherein the tube joint connecting piece 9 is a connecting bolt (shown in fig. 1);
7) Dismantling steel plate end sealing doors 47 at two ends of the steel shell immersed tube joint in the step C), removing water in the steel shell immersed tube joint cavity 41, outfitting, and installing an inner water stop belt which is an OMEGA water stop belt at the inner side of the steel shell immersed tube joint, wherein the inner water stop belt is installed at the inner side of the steel shell immersed tube joint as a secondary water stop structure, so as to obtain the submarine steel shell immersed tube tunnel 1. As shown in fig. 3, safety passages 48 are provided at intervals in the longitudinal direction of each steel shell pipe section 4 of the submarine steel shell immersed tube tunnel 1, so that the steel shell pipe section cavities 41 adjacent to each other of the submarine steel shell immersed tube tunnel 1 are communicated.
Example 2:
The sea area depth is 27 meters, the tunnel surface is positioned under the sea surface by 29.5 meters, and the steel shell pipe joint 4 is as follows: 180×32.5X10.4 m, the submarine steel shell immersed tube tunnel 1 of two-way four-lane expressway, steel shell tube section 4 dead weight 9500 ton, steel plate end seal doors 47 at two ends of steel shell tube section 4 are 50 tons, total amount of concrete in a clamping cavity 45 is 20200m 3, space of steel shell tube section 4 in sea is 58442m 3, tunnel space 36081m 3 of steel shell tube section 4, outfitting weight is 3700 tons, immersed tube section foundation 5 is a 1200mm thick gravels cushion layer, backfill locking layer 7 is gravels, ballast protection layer 8 is 2.1 m thick gravels+0.4 m thick C30 concrete.
The related art data (or parameters) and the related conditions of this embodiment are as follows:
1. The buoyancy and dead weight of the steel shell pipe section 4 (the steel shell immersed pipe section is essentially) of the submarine steel shell immersed pipe tunnel 1 are as follows:
Buoyancy: ffloat= 58440 ×1.03=60193 tons; self weight: wfrom=9500+50+20200×2.4=58030 tons;
2. The floating draft of the pipe joint to be immersed is as follows: hfortune=58030/(32.5×180×1.03) =9.63 meters;
3. taking into account the action of the ocean currents and the stabilization of the sinking, we take: weight of water intake +wself=1.06f float
Water inflow in the steel shell pipe joint cavity 41: v= (60193 x 1.06-58030)/1.03 = 6224m 3
4. The selection (2) of ship cranes, the load of each ship crane is:
(6224 x 1.03+58030-60193)/2=2124 tons, considering the situation under the complex power system of wave ocean current, more than two ship cranes of 7000 tons should be adopted to meet the requirement of sinking the submarine steel shell immersed tube joint under the complex environment.
The specific construction method of this embodiment 2 is the same as that described in embodiment 1.
Claims (6)
1. A construction method of a submarine steel shell immersed tube tunnel comprises the steps of manufacturing a steel shell immersed tube joint, constructing a tunnel foundation and installing the steel shell immersed tube joint;
The method is characterized in that: the manufacturing of the steel shell immersed tube joint comprises the following steps of:
A) Manufacturing a steel shell pipe joint at a shipyard dock or a tunnel dock, arranging a steel shell pipe joint water inlet pipe valve for injecting water into a steel shell pipe joint cavity of the steel shell pipe joint at the side part of the steel shell pipe joint in the length direction, arranging a steel shell pipe joint air outlet pipe valve for discharging air in the steel shell pipe joint cavity at the upper part of the steel shell pipe joint in the length direction, arranging concrete pouring holes and concrete pouring exhaust holes on the upper surface of the steel shell pipe joint at intervals, wherein the concrete pouring holes and the concrete pouring exhaust holes are communicated with a clamping cavity of the steel shell pipe joint, and carrying out corrosion prevention treatment on the inner surface and the outer surface of the steel shell pipe joint;
B) A water stop is arranged on the end face of one end of the steel shell pipe joint;
C) Installing steel plate end sealing doors at pipe joint cavity openings at two ends of a steel shell pipe joint;
D) The lock is opened to drain water for a shipyard dock or a tunnel dock, so that the steel shell pipe joint slowly floats upwards; or sliding the steel shell pipe joint into water through a slipway;
e) Hauling the steel shell pipe joint to a construction site dock for berthing;
F) The seawater of the wharf on the construction site is used as a construction platform for manufacturing the steel shell pipe joint to be sunk, the steel shell pipe joint floats on the sea surface, high-fluidity self-compaction concrete is poured into the clamping cavity of the steel shell pipe joint by means of the concrete pouring holes in the step A), the steel shell pipe joint to be sunk is obtained, the dead weight of the steel shell pipe joint to be sunk is smaller than the buoyancy of the steel shell pipe joint to be sunk, and the required number of steel shell pipe joints to be sunk are continuously manufactured in the same mode for standby.
The tunnel foundation construction comprises the following steps:
a) Excavating a tunnel foundation trench along the middle line of the submarine steel shell immersed tube tunnel;
b) Performing foundation construction on the tunnel foundation trench to obtain a immersed tube joint foundation;
The method for installing the steel shell immersed tube joint comprises the following steps of:
1) Floating the steel shell pipe section to be immersed obtained in the step F) to the sea surface position corresponding to the position above the immersed pipe section foundation obtained in the step b);
2) Hanging a pipe section of the steel shell to be immersed by a ship crane;
3) Opening the steel shell pipe section water inlet pipe valve and the steel shell pipe section exhaust pipe valve in the step A), enabling seawater to enter the steel shell pipe section cavity through the steel shell pipe section water inlet pipe valve, closing the steel shell pipe section water inlet pipe valve and closing the steel shell pipe section exhaust pipe valve when the sum of the self weights of the seawater entering the steel shell pipe section cavity and the steel shell pipe section to be submerged is larger than seawater buoyancy, and enabling the steel shell pipe section to be submerged to slowly sink to the immersed pipe section foundation in the step b) under the condition of being suspended by a ship to obtain the steel shell immersed pipe section;
4) The position of the steel shell immersed tube joint in the step 3) is adjusted through a ship crane, so that the installation of the first steel shell immersed tube joint is completed;
5) Backfilling, locking and ballasting protection, namely backfilling a locking layer in a space between two sides of the steel shell immersed tube joint in the length direction and the tunnel base groove in the step a), and covering a ballasting protection layer on the upper surface of the steel shell immersed tube joint in the length direction;
6) Repeating the steps 1), 2) and 3), completing butt joint of the subsequent steel shell immersed tube sections and the first steel shell immersed tube section installed previously through a ship crane through a pull-in device, connecting the two adjacent steel shell immersed tube sections end to end through a tube section connecting piece after the butt joint is completed, and repeating the steps 1), 2) and 3) until the installation of all the steel shell immersed tube sections is completed;
7) Dismantling steel plate end sealing doors at two ends of the steel shell immersed tube joint in the step C), removing water in the cavity of the steel shell immersed tube joint, outfitting, and additionally arranging an inner water stop belt at the inner side of the steel shell immersed tube joint to obtain the submarine steel shell immersed tube tunnel.
2. The construction method of the submarine steel shell immersed tube tunnel according to claim 1, wherein the construction method comprises the following steps: the anticorrosion treatment in the step A) refers to coating the outer surface of the steel shell pipe joint with a 3PE anticorrosion layer, wherein the 3PE anticorrosion layer is a three-layer structure polyethylene anticorrosion coating; and sintering epoxy powder on the inner surface of the steel shell pipe joint in a sintering mode.
3. The construction method of the submarine steel shell immersed tube tunnel according to claim 1, wherein the construction method comprises the following steps: the water stop in the step B) is GIAN water stops; the inner water stop in the step 7) is an OMEGA water stop.
4. The construction method of the submarine steel shell immersed tube tunnel according to claim 1, wherein the construction method comprises the following steps: the immersed tube section foundation in the step b) is a broken stone cushion layer.
5. The construction method of the submarine steel shell immersed tube tunnel according to claim 1, wherein the construction method comprises the following steps: the locking layer in the step 5) is a gravel or gravel backfill locking layer, and the ballast protection layer is a concrete protection layer covered on a sheet stone or a concrete protection layer covered on a gravel.
6. The construction method of the submarine steel shell immersed tube tunnel according to claim 1, wherein the construction method comprises the following steps: and (3) safety channels are arranged at intervals in the length direction of each steel shell pipe section of the submarine steel shell immersed tube tunnel formed by the steel shell pipe sections in the step 7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410497778.1A CN118223525A (en) | 2024-04-24 | 2024-04-24 | Construction method of submarine steel shell immersed tube tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410497778.1A CN118223525A (en) | 2024-04-24 | 2024-04-24 | Construction method of submarine steel shell immersed tube tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN118223525A true CN118223525A (en) | 2024-06-21 |
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|---|---|---|---|
| CN202410497778.1A Pending CN118223525A (en) | 2024-04-24 | 2024-04-24 | Construction method of submarine steel shell immersed tube tunnel |
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| Country | Link |
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| CN (1) | CN118223525A (en) |
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- 2024-04-24 CN CN202410497778.1A patent/CN118223525A/en active Pending
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