CN114348871A - Floating transportation device and transportation method for immersed tube - Google Patents
Floating transportation device and transportation method for immersed tube Download PDFInfo
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- CN114348871A CN114348871A CN202111478909.4A CN202111478909A CN114348871A CN 114348871 A CN114348871 A CN 114348871A CN 202111478909 A CN202111478909 A CN 202111478909A CN 114348871 A CN114348871 A CN 114348871A
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Abstract
The invention relates to the technical field of immersed tube transportation, and discloses a floating transportation device and a transportation method of immersed tubes. According to the floating transportation device and the transportation method of the immersed tube, the immersed tube is hoisted through the design of serial combined hoisting, so that the requirement of immersed tube transportation on the water depth of a channel is reduced, the navigation height required during immersed tube transportation is reduced, and the water and soil damage and the increase of the transportation cost can be greatly reduced when the water depth of the channel is insufficient or the road conditions of transportation with the limited height of bridge openings are met.
Description
Technical Field
The invention relates to the technical field of immersed tube transportation, in particular to a floating transportation device and a transportation method of immersed tubes.
Background
In the construction of urban inland river immersed tube tunnels, different-place prefabricated immersed tubes are often selected due to shortage of land, at present, the transportation of the immersed tubes at different places usually adopts a wet towing or semi-submersible barge transportation method, the draft of the immersed tubes is large in the wet towing process, the draft of the immersed tubes is often influenced by the water depth of a channel, so that a large amount of channel dredging work is needed, the semi-submersible barge transportation is required to be transformed due to the fact that the navigation height is often influenced by the height limit of an inland river bridge opening, the semi-submersible barge is also influenced by the submergence depth, the height of a dock wall of the semi-submersible barge cannot be reduced and transformed, therefore, when the immersed tube transportation is in the situations of insufficient water depth of the channel or high limit of the bridge opening, the transportation cost can be greatly increased regardless of channel dredging or semi-submersible barge transformation, and even the situation that the implementation cannot be realized can be met.
Disclosure of Invention
The invention aims to: the floating transportation device and the transportation method of the immersed tube can reduce the draft required in the immersed tube transportation process, reduce the requirement on the channel water depth, further reduce or avoid the channel dredging work, simultaneously reduce the navigation height required by the immersed tube transportation, further reduce or avoid the influence of bridge opening height limitation, and can greatly reduce the water and soil damage and increase the transportation cost when the channel water depth is insufficient or the bridge opening height limitation is met.
In order to achieve the purpose, the invention adopts the technical scheme that:
a floating transportation device for immersed tubes comprises a first floating box and a second floating box which are oppositely arranged, wherein an operation platform is jointly connected above the first floating box and the second floating box, the operation platform comprises a first floating box platform, a second floating box platform and a connecting cross beam, the first floating box platform is arranged on the first floating box, the first floating box platform is provided with a first overhanging platform extending out of the inner side surface of the first floating box, the second floating box platform is arranged on the second floating box, the second floating box platform is provided with a second overhanging platform extending out of the inner side surface of the second floating box, immersed tube placing spaces are formed among the bottom surface of the operation platform, the inner side surface of the first floating box and the inner side surface of the second floating box, winches and lifting ropes are arranged on the first floating box platform and the second floating box platform, a single-row or multi-row first trolleys are symmetrically arranged on the first overhanging platform and the second overhanging platform, one end of the lifting rope is connected with the winches, the other end of the lifting rope is connected with a plurality of pulleys in series and then hoisted to form the immersed tube.
The hoisting rope hoists the immersed tube through hoisting points of the immersed tube, the first tackle arranged in rows is convenient for the hoisting rope to be connected in series, in order to hoist the immersed tube stably, the immersed tube needs to be provided with the hoisting points at intervals in rows, the first tackle is provided with a plurality of rows at intervals, namely, the first overhanging platform is provided with the first tackle in rows, the second overhanging platform is also provided with the first tackle in rows correspondingly, the hoisting points of the immersed tube can be arranged at intervals in a plurality of rows correspondingly according to the first tackle in rows, the hoisting rope hoists the immersed tube through the pair of tackle, so that a stable series hoisting combination is formed, the pulling force requirement of the winch is greatly reduced by utilizing the principle that a plurality of movable pulleys are connected in series to save labor, the hoisting of the large immersed tube is realized, and the equipment cost of the winch is saved;
the first buoyancy tank and the second buoyancy tank are connected into a whole through the operating platform, so that the whole floating transportation device has enough buoyancy to support dead weight and load applied by hoisting, the sinking pipe is hoisted upwards by the winch towards the sinking pipe placing space, and the hoisting force applied to the sinking pipe can offset partial gravity of the sinking pipe, so that the draught depth of the sinking pipe can be reduced, and the requirement on the water depth of a transportation channel is reduced;
the immersed tube placing space is arranged between the first floating box and the second floating box, the first overhanging platform, the second overhanging platform and the connecting beam are used as the top surface of the immersed tube placing space, and when the winch is hoisted on the operating platform, the floating boxes for supporting the operating platform are arranged on two sides of the immersed tube, so that the operating platform is balanced in stress during hoisting, and the stability of the floating device during hoisting is ensured; the floating transportation device does not need to perform deep-water diving work like a semi-submersible barge, and equipment on the operating platform does not need to be heightened, so that the navigation height of the floating transportation device is far lower than that of the semi-submersible barge, and when power equipment such as a tugboat is adopted to pull the floating transportation device to transport a sunken tube, the influence of bridge opening height limitation can be reduced or avoided.
According to the floating transportation device for the immersed tube, disclosed by the invention, through the design of serial combined hoisting, the large immersed tube is hoisted, the draft depth of the immersed tube is reduced, the requirement of the immersed tube transportation on the channel depth is further reduced, the channel dredging work required during the immersed tube transportation is reduced or avoided, the navigation height required during the immersed tube transportation is reduced, and the influence of bridge opening height limitation is reduced or avoided, so that the water and soil damage and the increase of the transportation cost can be greatly reduced when the transportation road condition that the channel depth is insufficient or the bridge opening height is limited is met.
Preferably, operating platform's bottom surface still is equipped with the location mound, the location mound is located immersed tube places the space in, the location mound is equipped with the protection pad, the location mound is used for butt immersed tube.
Because the immersed tube need hoist and mount the transportation, stability when transporting in order to improve the immersed tube, the location mound can support tightly each other with the immersed tube of hoist and mount to make the immersed tube can be fixed in operation platform's below can not take place to rock when then the immersed tube transports, avoids the transport in the immersed tube along the unbalanced and series connection of length direction atress the lifting rope takes place to slide, has also prevented simultaneously the immersed tube with operation platform takes place asynchronous elevating movement, the protection pad of location mound can provide good holding surface, and the protection immersed tube is difficult for receiving the damage.
Preferably, the plurality of connecting beams are arranged between the first overhanging platform and the second overhanging platform at intervals.
It is through a plurality of connect the crossbeam to connect buoyancy tank platform one and buoyancy tank platform two and constitute operation platform, the interval design of connecting the crossbeam is guaranteeing under operation platform structural strength's the condition, can effectively save operation platform's area not only can reduce the dead weight, greatly reduction in production cost, still be convenient for right operation platform carries out the size transformation, if when hoist not unidimensional immersed tube, only need change or modify connect the size of crossbeam, just can make the size adaptation immersed tube in immersed tube placing space's size has reduced operation platform's the transformation degree of difficulty and work load, has improved the practicality of transportation by flotation device.
Preferably, the hoisting device further comprises a second pulley, a sling and a hoisting plate, wherein the second pulley is arranged below the first pulley, the hoisting rope can be vertically connected with the first pulley and the second pulley, the second pulley is used as a hoisting point of the immersed tube, the sling is vertically connected with the hoisting plate and the second pulley, and the hoisting plate is used for abutting against the lower surface of the immersed tube.
The hoisting rope hoists the immersed tube through the hoisting point, the pulley II is connected to the upper surface of the immersed tube as the hoisting point for connecting the immersed tube, the hoisting rope is convenient to be connected with the pulley II in series to form a movable pulley principle hoisting point, the distance between the pulleys I is adjusted, so that the hoisting rope is connected with the pulley I and the pulley II in a vertical state, the traction force of a winch can be fully utilized to carry out vertical multipoint traction when the immersed tube is hoisted, the installation of hoisting equipment is simplified, and the construction is convenient; through the design of hoist cable and hanger plate, the hoist cable all passes the better lateral wall pre-buried hole of immersed tube structural strength to the immersed tube bottom surface, makes the lifting force homoenergetic that every hoisting point received can act on the bottom of immersed tube, guarantees that the hoist and mount atress of immersed tube is more reasonable, avoids only the top of immersed tube to be drawn and need increase pre-buried reinforcing bar and the risk of drawing the fracture.
Preferably, a safety gap is reserved between the first floating box and the second floating box corresponding to the width of the immersed tube, and the first pulleys are arranged in rows along the length direction of the immersed tube placing space.
Most of the immersed tubes are approximately of cuboid structures, the distance between the first floating box and the second floating box is used as the width of the immersed tube placing space and is slightly larger than the width of the immersed tubes, the required width of the operating platform is shortened as much as possible, the strength requirement of the operating platform is reduced, the hoisting reliability is improved, and the reserved safety gap can ensure that the immersed tubes cannot collide with a floating transportation device in the transportation process; and the arrangement direction of the first tackle ensures that the lifting rope can pass through the first tackle to carry out serial lifting on two sides of the immersed tube along the long edge direction of the immersed tube, thereby ensuring balanced lifting stress.
Preferably, the first buoyancy tank platform and the second buoyancy tank platform are both provided with two winches, the winches transversely correspond to the head end and the tail end of the first tackle arranged in a row, the two winches of the first buoyancy tank platform are connected with two ends of one lifting rope, and the two winches of the second buoyancy tank platform are connected with two ends of the other lifting rope.
The first pulley on the first overhanging platform is connected in series through one lifting rope, the first pulley on the second overhanging platform is connected in series through the other lifting rope, the two ends of each lifting rope are provided with the winches for traction, the two ends of each lifting rope are synchronously retracted, the lifting speed of the immersed tube during lifting can be increased, and the rope accommodating capacity of the winches is increased; the installation position of the winch enables the lifting rope to be directly connected with the winch in a horizontal state after being dragged and steered by 90 degrees of the first pulley, the lifting rope cannot transfer stress due to deflection influence, and the fixed installation of the lifting rope is facilitated.
Preferably, the operation platform is further provided with a control system, the control system is electrically connected with the winch, and the control system is located on the first buoyancy tank platform or the second buoyancy tank platform.
The control system is convenient for carry out automated control to the winch, uses manpower sparingly, the control system is located the flotation tank one or the position directly over the flotation tank two, compare in the control system establishes the top of connecting the crossbeam, the control system is changeed and arranges, moreover the control system can not hinder the change construction of connecting the crossbeam, right it can obviously reduce the work load of changing when carrying out the size change to connect the crossbeam.
Preferably, the first buoyancy tank and the second buoyancy tank are both provided with a water pumping system, the water pumping system is electrically connected with the control system, and the water pumping system is used for controlling the water storage capacity in the first buoyancy tank and the second buoyancy tank.
Through pumping system can adjust the draft of flotation tank, and then is convenient for control immersed tube places the space height on the surface of water, and then the draft when corresponding immersed tube transportation can be adjusted makes operation platform can be applicable to and hoist the immersed tube of multiple specification, can make appropriate regulation to the change of channel depth of water or navigation height in the transportation simultaneously.
Preferably, the two ends of the long edge of the first buoyancy tank and the two buoyancy tanks are respectively provided with a horizontal cable adjusting winch, the horizontal cable adjusting winches are connected with horizontal cable adjusting cables, the horizontal cable adjusting winches are used for connecting corners of the top surface of the immersed tube, the connecting beam is provided with longitudinal cable adjusting winches, the longitudinal cable adjusting winches are connected with longitudinal cable adjusting cables, and the longitudinal cable adjusting cables are used for connecting longitudinal pull points of the top surface of the immersed tube.
Violently transfer the cable winch and carry out horizontal tractive at four corners of immersed tube through violently transferring the cable, and then be convenient for adjust the removal of immersed tube, vertically draw the position and be located the axis of immersed tube top surface on and be close to the avris of immersed tube, vertically transfer the cable winch and carry out vertical tractive to the immersed tube through indulging, and then in the space is placed to the immersed tube, be convenient for adjust the relative position of immersed tube on the horizontal plane, make the immersed tube can adjust to preset position fast accurately, carry out the hoisting point installation of coaster two, simultaneously in the transportation, through violently transferring the cable and indulge the tractive of transferring the cable on the horizontal direction fixed, the cooperation the location mound can further improve the stability of immersed tube transportation.
Preferably, the first buoyancy tank platform and the second buoyancy tank platform are both hollow box girder structures, and a plurality of cable guides and cable piles are fixed on the first buoyancy tank and the second buoyancy tank.
The cable guide device is used for guiding cables when the cables are pulled, the cable piles are convenient for the towing ship to pull and fix, the first buoyancy tank platform and the second buoyancy tank platform are both of hollow structures and have enough indoor space for workers to live and work, and the cable piles can be embedded in the buoyancy tank platforms to facilitate the towing ship to fixedly drag in multiple directions.
A method for transporting immersed tubes, which uses the floating transportation device of immersed tubes, comprising the following steps:
A. setting the required pulling force of a winch on the floating transportation device and the number of hoisting points of the immersed tube;
B. correspondingly arranging a corresponding number of hoisting points on the immersed tube, arranging a plurality of first pulleys by the floating device according to the number and the positions of the hoisting points, connecting the plurality of first pulleys in series by using hoisting ropes, and connecting a second pulley in series between every two adjacent first pulleys, wherein the plurality of second pulleys are suspended below the first pulleys through the hoisting ropes;
C. after the immersed tube is launched for floating, the floating device is drawn to the position above the immersed tube, and the horizontal position of the immersed tube is adjusted, so that the sling of each lifting point of the immersed tube is vertically corresponding to one pulley II;
D. controlling the plurality of second pulleys to descend to the upper surface of the immersed tube to be connected with the sling, and finishing the serial connection of the immersed tube hoisting;
E. the winch is operated to draw the lifting rope according to the set pulling force, so that the immersed tube is driven to ascend and is abutted against the positioning pier; or the first buoyancy tank and the second buoyancy tank are operated to press water, the floating transportation device is made to sink until the positioning pier is abutted to the immersed tube, and then the floating transportation device drains water and floats to lift the immersed tube;
F. and keeping the hoisting state of the floating transportation device on the immersed tube, and dragging the floating transportation device to move by using a tugboat to finish the transportation of the immersed tube.
According to the transport method of the immersed tube, the immersed tube is lifted by using enough buoyancy provided by the double floating boxes symmetrically arranged on the floating device and a series combined hoisting method, so that the draft of the immersed tube is reduced, the requirement of the immersed tube transport on the channel water depth is further reduced, the channel dredging work required during the immersed tube transport is reduced or avoided, the navigation height required during the immersed tube transport is reduced, the influence of bridge opening height limitation is reduced or avoided, and the water and soil damage and the transport cost increase can be greatly reduced when the transport road conditions that the channel water depth is insufficient or the bridge opening height is met.
Preferably, in the step B, the set hoisting points are uniformly distributed above the side walls on both sides of the immersed tube, the hoisting points on a single side wall are uniformly arranged at intervals in a straight line, each hoisting point comprises a sling and a hoisting plate, the sling vertically penetrates through the side wall of the immersed tube to be connected with the hoisting plate, and the hoisting plate is abutted to the lower surface of the immersed tube through the traction of the sling.
The lifting rope only hoists the immersed tube through the lifting point, the position design of a plurality of lifting point is convenient for the lifting rope to carry out the series connection hoist and mount, the hoist and mount balance of the immersed tube is guaranteed simultaneously, through the installation design of hoist cable and hanger plate, the hoist cable is all established in the lateral wall that structural strength is better, and the lifting force homoenergetic that every lifting point received can act on the bottom of immersed tube for the hoist and mount atress of immersed tube is more reasonable, avoid the immersed tube only the top surface to be drawn need to increase embedded steel bar and the fracture risk of being drawn.
Preferably, in the step a, the method for designing the required pulling force of the winch on the floating device and the number of hoisting points of the immersed tube comprises the following steps:
a1, determining the draft after the immersed tube is hoisted according to the channel depth on site, wherein the draft after the immersed tube is hoisted exceeds half of the draft before the immersed tube is hoisted;
a2, calculating the calibration lifting force required by the immersed tube according to the draft after the immersed tube is hoisted;
a3, determining the pulling force and the number of hoisting points of the winch according to the calibrated hoisting force and the combination of actual working conditions.
The sinking pipe is transported through the floating transportation device, the draft of the sinking pipe is the channel depth required by the sinking pipe transportation, the sinking pipe is generally double-channel, the number of the side walls of the vertical support of the sinking pipe is generally four, in order to simplify the early construction of hoisting, only the side walls on two sides of the sinking pipe are hoisted, and the two side walls in the middle of the sinking pipe are not provided with hoisting points, so that in order to ensure that the hoisting does not influence the structural strength of the sinking pipe, the draft after the hoisting of the sinking pipe is designed to exceed half of the draft before the hoisting of the sinking pipe, namely the hoisting force for controlling the hoisting is about less than half of the total weight of the sinking pipe, and further, when only the two side walls on the side of the sinking pipe are hoisted, the structural deformation of the sinking pipe caused by the traction can be avoided as much as possible; the actual working conditions comprise the limitation of the rated power of the winch, the area limitation of an operating platform, the limitation of the size of the immersed tube and the like, and all factors can influence the determination of the pulling force of the winch and the number of hoisting points;
the method determines the number of the hoisting points of the immersed tube and the working tension of the winch during transportation, so that the immersed tube can be precisely hoisted to the required draft by the floating transportation device, the requirement of channel depth is met, the smooth transportation of the immersed tube is ensured, the difficulty of hoisting construction is reduced, and the risk of damage to the structure of the immersed tube caused by hoisting is avoided.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the floating transportation device for the immersed tube, disclosed by the invention, through the design of serial combined hoisting, the large immersed tube is hoisted, the draft depth of the immersed tube is reduced, the requirement of immersed tube transportation on the channel depth is further reduced, the channel dredging work required during immersed tube transportation is reduced or avoided, the navigation height required during immersed tube transportation is reduced, and the influence of bridge opening height limitation is reduced or avoided, so that the damage to soil and water and the increase of transportation cost can be greatly reduced when the transportation road condition that the channel depth is insufficient or the bridge opening height is limited is met; meanwhile, by realizing shallow draft low navigation transportation of the immersed tube, the existing immersed tube prefabrication factory can be fully utilized to prefabricate the immersed tube in different places, and the repeated construction of an immersed tube prefabrication site can be greatly reduced, so that the temporary construction cost of the urban tunnel is reduced, and the construction cost of the tunnel is reduced;
2. through the design of the positioning piers, the immersed tube can be fixed below the platform, the immersed tube cannot shake during transportation, and meanwhile, the immersed tube is protected from being damaged;
3. through the design of the suspension cables and the suspension plates, the lifting force applied by the floating device to each lifting point of the immersed tube can act on the bottom of the immersed tube, so that the lifting force of the immersed tube is more reasonable, and the risk that embedded steel bars are required to be added and the immersed tube is pulled to crack when only the top surface of the immersed tube is pulled is avoided;
4. through the design of the first pulley and the second pulley, the lifting rope can conveniently connect the lifting points of the immersed tube in series, the lifting rope can be ensured to keep a vertical state for uniformly lifting multiple lifting points, and further the uniform stress of the immersed tube is ensured;
5. the floating transportation device for the immersed tube is simple in structure, smaller in size compared with other transportation ships, and capable of hoisting a large immersed tube in a labor-saving mode, further achieving transportation of the immersed tube with low navigation requirements, sinking the immersed tube in the existing structure, hoisting, and completing installation work of the immersed tube, and has economical efficiency and practicability;
6. according to the method for transporting the immersed tube, the immersed tube is lifted for transportation by using enough buoyancy provided by the double floating boxes symmetrically arranged on the floating transportation device and a method of serial combined hoisting, so that the draft of the immersed tube is reduced, the requirement of the immersed tube transportation on the channel water depth is further reduced, the channel dredging work required during the immersed tube transportation is reduced or avoided, the navigation height required during the immersed tube transportation is reduced, the influence of bridge opening height limitation is reduced or avoided, and the water and soil damage and the increase of the transportation cost can be greatly reduced when the transportation road conditions that the channel water depth is insufficient or the bridge opening height is limited are met.
Drawings
FIG. 1 is a schematic plan view showing the arrangement of the floating transportation device for immersed tube according to example 1;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
FIG. 4 is a left side view of FIG. 1;
FIG. 5 is a schematic plan view of the floating transport device for immersed tube of embodiment 1 for transporting the suspended immersed tube;
FIG. 6 is a side view of the middle longitudinal section of the floating device for sinking pipe of embodiment 1 when the floating device is connected with the sinking pipe and no load is applied;
FIG. 7 is the right side view of the floating device for sinking pipe of embodiment 1 when the floating device is connected to the sinking pipe and the sinking pipe is unloaded;
FIG. 8 is a sectional view of the floating device of the immersed tube according to embodiment 1 taken along line D-D of FIG. 6;
FIG. 9 is an enlarged partial view of portion C of FIG. 8;
fig. 10 is a side view of a middle longitudinal section of a sinking pipe hoisted by the floating device for sinking pipes according to embodiment 1;
fig. 11 is a right side view of the floating device for sinking pipe of embodiment 1 hoisting sinking pipe;
fig. 12 is a sectional view of the floating device of the immersed tube according to embodiment 1 at E-E of fig. 10;
the labels in the figure are: 1-first buoyancy tank, 2-second buoyancy tank, 3-operation platform, 31-first buoyancy tank platform, 311-first overhanging platform, 32-second buoyancy tank platform, 321-second overhanging platform, 33-connecting beam, 4-winch, 5-lifting rope, 6-first tackle, 7-positioning pier, 8-control system, 9-second tackle, 10-lifting rope, 11-lifting plate, 12-immersed tube, 13-horizontal cable-adjusting winch, 14-horizontal cable-adjusting, 15-vertical cable-adjusting winch, 16-vertical cable-adjusting, 17-cable guide and 18-cable pile.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention.
Example 1
As shown in fig. 1-4, the floating transportation device for immersed tube of the present invention comprises a first floating box 1 and a second floating box 2 which are oppositely arranged, the upper parts of the first floating box 1 and the second floating box 2 are commonly connected with an operation platform 3, the operation platform 3 comprises a first floating box platform 31, a second floating box platform 32 and a connecting beam 33, the first floating box platform 31 is arranged on the first floating box 1, the first floating box platform 31 is provided with a first overhanging platform 311 extending out of the inner side surface of the first floating box 1, the second floating box platform 32 is arranged on the second floating box 2, the second floating box platform 32 is provided with a second overhanging platform 321 extending out of the inner side surface of the second floating box 2, a space for placing immersed tube is formed between the bottom surface of the operation platform 3, the inner side surface of the first floating box 1 and the inner side surface of the second floating box 2, the first floating box platform 31 and the second floating box platform 32 are provided with a winch 4 and a lifting rope 5, a single row or multiple rows of first trolleys 6 are symmetrically arranged on the first overhanging platform 311 and the second overhanging platform 321, one end of the lifting rope 5 is connected with the winch 4, and the other end of the lifting rope 5 is connected with the first pulleys 6 in series and then hoisted with the immersed tube 12.
In this embodiment, the pipe section of immersed tube 12 transports to the scene and installs after the strange land mill prefabrication is accomplished, and the depth of water of transportation channel only has 2.3 ~ 5.7m, need pass through many big bridges simultaneously, and the bridge opening navigation limit for height is 18m, immersed tube 12's pipe section size: 125m in length, 36m in width and 9m in height, and has a weight of 37000t and a draft of 8.7 m.
If a semi-submersible barge matched with the size parameters of the immersed tube 12 is adopted for transportation, the navigation height of the semi-submersible barge needs 33m correspondingly, a submergence pit is usually arranged in front of a bridge opening, the semi-submersible barge sinks in the submergence pit before reaching the bridge opening, the immersed tube 12 is unloaded, and the semi-submersible barge is transported to the site by using a wet towing method, but the water depth of the rest channel cannot meet the draft depth of the immersed tube 12 per se, the channel of the wet towing is also required to be dredged, so that the water depth of the channel is more than 8.7m, therefore, the construction amount and the construction cost of channel dredging are huge, if the navigation height of the semi-submersible barge is reformed to be lower than the bridge opening, the reforming difficulty is large, the cost is high, and the requirement of the semi-submersible barge for sinking tube unloading cannot be met after the height of a buoyancy tank of the semi-submersible barge is reduced, so that the reforming cannot be carried out.
Therefore, a floating transportation device is designed to hoist and transport the immersed tube 12, the draft of the immersed tube 12 is reduced, the navigation height can meet the requirement, and the floating transportation device is driven to move by power equipment such as a tugboat, so that the transport of the immersed tube 12 can be completed.
The minimum draft that the floating transport device can adjust, namely when the floating transport device hoists the immersed tube 12, the draft of the buoyancy tank is equal to the draft of the immersed tube 12, the range of channel depth is 2.3-5.7 m, because the channel depth of greater distance is greater than 5m, the adjusted minimum draft is taken into comprehensive consideration and corresponds to the cost required by the floating transport device, the channel depth required by the transport of the immersed tube 12 is controlled within the range of 5.5m, only the channel less than 5.5m needs to be dredged, the draft required by the immersed tube 12 is less than or equal to 5m, the height of the immersed tube 12 exposed on the water surface is greater than or equal to 4m, and the safe clearance is reserved according to the width of the immersed tube 12 between the buoyancy tank I1 and the buoyancy tank II 2, and the reserved safe clearance is 2 m;
the draft of the immersed tube 12 was controlled to 5m by calculation, and it was necessary to apply a lifting force of 15000t, as shown in fig. 7 and 8, according to the parameters of the floating device manufactured as above described requirements: the draft of the floating device when the floating device is unloaded is 2.2 m-2.5 m, the navigation height is 17.3 m-17 m, as shown in fig. 11 and 12, when the lifting weight of the floating device is 15000t, the draft of the floating device is 5m, the navigation height is 14.7m, the length of the floating device is 168m, the width of the floating device is 76m, the heights of the first buoyancy tank 1 and the second buoyancy tank 2 are 9m, and the width of the first buoyancy tank 1 and the second buoyancy tank 2 is 18m, so that the distance between the first buoyancy tank 1 and the second buoyancy tank 2 is 40 m; the length of the first buoyancy tank platform 31 and the height of the second buoyancy tank platform 32 are 76m and 6m, the heights of the first overhanging platform 311 and the second overhanging platform 321 are both 4m, and the thickness of the connecting beam 33 is also 4 m;
wherein, the bottom surface of the operation platform 3 is provided with four positioning piers 7, the number of the positioning piers 7 can be increased, the positioning piers can be uniformly distributed on the bottom surface of the operation platform 3, the positioning piers 7 are inverted trapezoidal piers with the height of 2m, the top surface of the positioning piers 7 is fixed with a rubber protection pad, the four positioning piers 7 are uniformly distributed near four corners of the immersed tube placing space,
the operation platform 3 is formed by assembling a first buoyancy tank platform 31, a second buoyancy tank platform 32 and three connecting cross beams 33, wherein one side of the first buoyancy tank platform 31, which faces the second buoyancy tank 2, is also provided with a first overhanging platform 311 horizontally extending out of the first buoyancy tank 1, one side of the second buoyancy tank platform 32, which faces the first buoyancy tank 1, is also provided with a second overhanging platform 321 horizontally extending out of the second buoyancy tank 2, the first overhanging platform 311 and the second overhanging platform 321 can extend out to be above hanging points on two sides of the immersed tube 12, namely, the distance between the first overhanging platform 311 and the second overhanging platform 321 is smaller than the width of the immersed tube 12, the three connecting cross beams 33 are respectively positioned between the first overhanging platform 311 and the second overhanging platform 321 and are connected, the first buoyancy tank platform 31 and the second buoyancy tank platform 32 are both hollow box beam structures, and the hollow structures can be fully utilized as a working room or a living room, and some equipment needing rain sheltering can be placed;
the control system 8 is distributed on the first buoyancy tank platform 31 and the second buoyancy tank platform 32, the control system 8 comprises electromechanical equipment and a pipeline box, the control system 8 is electrically connected with the winch 4, the first buoyancy tank 1 and the second buoyancy tank 2 are also provided with a water pumping system for controlling the volume of ballast water in the buoyancy tanks, and the control system 8 is electrically connected with the water pumping system;
as shown in fig. 9, the floating transportation device is further provided with a second pulley 9, a sling 10 and a hanging plate 11, the second pulley 9 is connected to the top surface of the sinking pipe 12 as a hanging point of the sinking pipe 12, the hanging rope 5 penetrates through the second pulley 9 to complete the hanging of the sinking pipe 12, the sling 10 penetrates through the sinking pipe 12 and is vertically connected with the hanging plate 11 and the second pulley 9, the sling 10 is connected with the second pulley 9 through a pin shaft, and the hanging plate 11 is supported on the bottom surface of the sinking pipe 12.
101 first pulleys 6 are fixed on a first overhanging platform 311 in rows, because of the length limitation of the first overhanging platform 311 and the length limitation of the immersed tube 12, the 101 first pulleys 6 are divided into two rows which are uniformly arranged at intervals along the length direction of the first overhanging platform 311, the two rows of first pulleys 6 are staggered, so that a lifting rope 5 can be horizontally connected in series to the other row of corresponding first pulleys 6 after penetrating through any one first pulley 6, a second pulley 9 is suspended between the two rows of first pulleys 6 through the lifting rope 5, the distance between the two rows of first pulleys 6 corresponds to the inlet and outlet of the second pulley 9, the lifting rope 5 can vertically connect the first pulleys 6 and the second pulleys 9 in a vertical state, and the 101 first pulleys 6 are divided into two rows which can suspend 100 second pulleys 9 in series;
101 first pulleys 6 are also fixed on the overhanging platform two 321, the first pulleys 6 and the overhanging platform one 311 are symmetrically arranged relative to the long axis of the immersed tube placing space, 100 second pulleys 9 are also suspended on the overhanging platform two 321, through holes for hoisting the lifting rope 5 are correspondingly formed in two sides of each first pulley 6 of the overhanging platform one 311 and the overhanging platform two 321, and the distance between the first pulleys 9 suspended in rows by the overhanging platform one 311 and the second pulleys 9 suspended in rows by the overhanging platform two 321 is slightly smaller than the width of the immersed tube 12.
Two winches 4 are fixed on the first buoyancy tank platform 31, the two winches 4 are just transversely corresponding to the head ends and the tail ends of the two rows of first pulleys 6 on the first overhanging platform 311, namely after the lifting rope 5 turns by 90 degrees of the first pulleys 6 from the vertical hoisting direction, the two ends of the lifting rope 5 can be horizontally fixed with the winches 4 on the first buoyancy tank platform 31, and the two ends of the lifting rope 5 do not need to deflect when being fixed; two winches 4 are also fixed on the second buoyancy tank platform 32, and the position design of the winches is the same as the principle of the first buoyancy tank platform 31, so that the lifting ropes 5 on the second overhanging platform 321 are ensured not to deflect when being fixed.
The top surfaces of two ends of the first buoyancy tank 1 and the second buoyancy tank 2 are both fixed with a horizontal cable adjusting winch 13, the horizontal cable adjusting winch 13 is connected with a horizontal cable adjusting 14, and the corners of the inner sides of the top surfaces of the first buoyancy tank 1 and the second buoyancy tank 2 are also fixed with cable guides 17; the longitudinal cable adjusting winch 15 and the cable guide 17 are fixed on the two connecting cross beams 33 located on the sides of the immersed tube placing space, the longitudinal cable adjusting winch 15 is located in the middle of the connecting cross beams 33 and corresponds to the central axis of the immersed tube 12 below, the longitudinal cable adjusting winch 15 is connected with the longitudinal cable adjusting 16, the longitudinal cable adjusting 16 can pull the immersed tube to the immersed tube placing space through the cable guide 17, and a plurality of cable piles 18 are further fixed on the outer sides of the two ends of the top surfaces of the first buoyancy tank 1 and the second buoyancy tank 2 and used for towing the tug at the periphery of the floating device through cables.
When transportation is needed, as shown in fig. 5-10, according to the distance between two rows of suspension pulleys 9, the prefabricated sinking pipe 12 is correspondingly provided with slings 10 and hanging plates 11, cable piles are provided at four corners of the top surface of the sinking pipe 12 and at two ends of the central axis, the sinking pipe 12 is placed in the water to float through dry dock irrigation or trolley barge, the floating transportation device is aligned with the end of the sinking pipe 12 and is sleeved into the position right above the sinking pipe 12 through twisting, four transverse adjusting cables 14 at the two ends of the first floating box 1 and the second floating box 2 are respectively fixed on the cable piles at the four corners of the sinking pipe, and two transverse adjusting cables 14 at the same end are arranged in a crossing way, then two longitudinal adjusting cables 16 are fixed on the two cable piles on the central axis of the sinking pipe 12 through the traction of the cable guider 17 in a crossing way, the sinking pipe 12 is transversely and longitudinally pulled through controlling the transverse adjusting cable winch 13 and the longitudinal adjusting cable winch 15 in the horizontal direction, the immersed tube 12 reaches a preset position, the pulleys two 9 suspended by the first overhanging platform 311 and the second overhanging platform 321 can be in one-to-one correspondence to preset lifting point positions of the immersed tube 12, the sling 10 is connected with the pulleys two 9 through a pin shaft, because two lifting ropes 5 are respectively connected with 101 pulleys one 6 and 100 pulleys two 9 in series, the winches 4 on the buoyancy tank platform one 31 and the buoyancy tank platform two 32 are respectively used for pulling the immersed tube 12 through 100 movable pulley blocks, the winches 4 can provide enough hoisting force with extremely small pulling force through 200 movable pulley blocks, the control system 8 starts the winches 4 to lift the immersed tube, so that the top surface of the immersed tube 12 is just butted and fixed with the positioning piers 7, then ballast water in the buoyancy tank one 1 and the buoyancy tank two 2 is adjusted, the draft of the floating device is 5.0m, at this time, the draft of the immersed tube is also about 5.0m, the hoisting force of the winches 4 is about 15000t, and the navigation height of the floating device is 14.5m, the towing wheel and the bollard 18 of the floating transportation device are fixed by the mooring rope, the whole transportation path of the immersed tube 12 is completed by towing the floating transportation device by the towing wheel, and the transverse adjusting cable 14 and the longitudinal adjusting cable 16 are kept to draw and fix the immersed tube 12 in the transportation process.
In this embodiment, the number of the first trolley 6 and the second trolley 9 in each row and the hoisting force of the winch 4 determine the total hoisting force for hoisting the immersed tube 12, so that the number of the first trolley 6 and the second trolley 9 in each row and the model selection of the maximum power of the winch 4 can be comprehensively determined according to the designed hoisting force by combining the size of the immersed tube 12 and the winch 4, if the number of the hoisting points is less, the first trolley 6 can be arranged in a row on the first overhanging platform 311 and the second overhanging platform 321, which is convenient for the hoisting ropes 5 to be connected in series, and if the number of the hoisting points is more, the first trolley 6 can also be arranged in multiple rows under the limited length of the overhanging platform and the immersed tube 12; in the transportation, can also be through the water storage in pumping system control flotation tank 1 and the flotation tank two 2, and then can carry out the regulation and control that suits between navigation height and draft, for example increase the water storage capacity in certain control range, the draft of floating device increases, and the navigation height is corresponding to be reduced to can adapt to more transportation road conditions.
Example 2
The invention relates to a method for transporting immersed tubes, which uses a floating transportation device as described in embodiment 1, and comprises the following steps:
A. setting the required pulling force of the winch 4 on the floating device and the number of hoisting points of the immersed tube 12;
B. correspondingly arranging a corresponding number of hoisting points on the immersed tube 12, arranging a plurality of first pulleys 6 on the floating device according to the number and the positions of the hoisting points, connecting the plurality of first pulleys 6 in series by using a hoisting rope 5, and connecting a second pulley 9 in series between every two adjacent first pulleys 6, wherein the plurality of second pulleys 9 are suspended below the first pulleys 6 through the hoisting rope 5;
C. after the immersed tube 12 is floated in the water, the floating device is pulled to the position above the immersed tube 12, and the horizontal position of the immersed tube 12 is adjusted, so that the sling 10 of each lifting point of the immersed tube 12 is vertically corresponding to one pulley II 9;
D. controlling the plurality of second pulleys 9 to descend to the upper surface of the immersed tube 12 to be connected with the sling 10, and finishing the serial connection of the hoisting of the immersed tube 12;
E. the winch 4 is operated to draw the lifting rope 5 according to the set pulling force, and the immersed tube 12 is driven to ascend and is abutted to the positioning pier 7; or the first buoyancy tank 1 and the second buoyancy tank 2 are operated to press water, the floating transportation device is sunk until the positioning piers 7 are abutted to the immersed tube 12, and then the floating transportation device drains water, floats and lifts the immersed tube 12;
F. and keeping the hoisting state of the floating transportation device on the immersed tube 12, and dragging the floating transportation device to move by using a tugboat to finish the transportation of the immersed tube 12.
In this embodiment, the pipe section of immersed tube 12 transports to the scene and installs after the strange land mill prefabrication is accomplished, and the depth of water of transportation channel only has 2.3 ~ 5.7m, need pass through many big bridges simultaneously, and the bridge opening navigation limit for height is 18m, immersed tube 12's pipe section size: 125m in length, 36m in width and 9m in height, and has a weight of 37000t and a draft of 8.7 m.
The step A specifically comprises the following steps:
step a1 is performed: determining the draught after the immersed tube 12 is hoisted according to the on-site channel water depth, wherein the draught after the immersed tube 12 is hoisted is not lower than half of the draught before the immersed tube 12 is hoisted; the water depth of the on-site channel is 2.3-5.7 m, the water depth of the immersed tube 12 before being hoisted is 8.7m, and the water depth of the immersed tube 12 after being hoisted is not lower than 4.35m, so that the water depth of the immersed tube 12 is set to be 5m, partial dredging is carried out on the on-site channel, and the water depth of the channel transported by the immersed tube 12 is larger than 5 m.
A2, calculating the calibration lifting force required by the immersed tube 12 according to the draft after the immersed tube 12 is hoisted; the draft after the immersed tube 12 is hoisted is 5m, the draft before the immersed tube 12 is hoisted is 8.7m, and the calibrated hoisting force required by the immersed tube 12 is calculated to be about 15000t according to the buoyancy change of the immersed tube 12.
A3, determining the pulling force and the number of hoisting points of the winch 4 according to the calibrated hoisting force and the combination of actual working conditions; the calibrated hoisting force is 15000t, the maximum total hoisting force of the floating transportation device is 20000t, and 200 hoisting points are set for hoisting the immersed tube 12 according to the power of the winch 4.
And B, performing the step B: the method comprises the following steps that corresponding quantity of lifting points are correspondingly arranged on a sinking pipe 12, the arranged lifting points are uniformly distributed above side walls on two sides of the sinking pipe 12, the lifting points on a single side wall are linearly and uniformly arranged at intervals, namely 100 lifting points are arranged on the two side walls, the 100 lifting points on the single side wall are linearly and uniformly arranged in a row at intervals, each lifting point comprises a sling 10 and a lifting plate 11, the sling 10 vertically penetrates through the side wall of the sinking pipe 12 to be connected with the lifting plate 11, the sling 10 is bolted with the lifting plate 11 through nuts, and the lifting plate 11 is abutted to the lower surface of the sinking pipe 12 through the traction of the sling 10;
101 first pulleys 6 are fixed on the first overhanging platform 311 and the second overhanging platform 321 of the floating device according to the positions of 200 hoisting points;
on the overhanging platform I311, 101 pulleys I6 are connected in series by using a lifting rope 5, and a pulley II 9 is connected in series between two adjacent pulleys I6, then 100 pulley II 9 are hung below the 101 pulleys I6 through the lifting rope 5, the distance between the two adjacent pulleys I6 can keep a vertical state when the lifting rope 5 hangs the pulley II 9, the distance between each sling 10 is limited due to the length limitation of the immersed tube 12, in order to enable the distance between the pulley II 9 to be matched with the distance between the slings 10, the 101 pulleys I6 are divided into two rows and evenly arranged along the length direction of the overhanging platform I311, compared with the fixed 101 pulley I6 in a single row, the pulley II 9 can rotate 90 degrees and be hung below the pulley I6, so that the distance between the two adjacent pulleys II 9 is effectively reduced, and the pulley II 9 can be matched with the distance between the slings 10. Similarly, the operation of the second overhanging stage 321 is the same as that of the first overhanging stage 311.
And C, performing the step C: mooring bollards are anchored at the four corners of the top surface of the immersed tube 12 and at the two ends of the central axis, the immersed tube 12 is moved into the water by filling water in a dry dock or refuting on a trolley, the launching and floating are finished, the floating transportation device is aligned to one end of the immersed tube 12, four transverse adjusting cables 14 at two ends of the first buoyancy tank 1 and the second buoyancy tank 2 are respectively fixed on the cable piles at four corners of the immersed tube by twisting and sleeving the two transverse adjusting cables above the immersed tube 12, and two horizontal adjusting cables 14 at the same end are arranged in a crossed manner, and two longitudinal adjusting cables 16 are fixed on two cable piles 18 on the central axis of the immersed tube 12 in a crossed manner through the traction of a cable guider 17, the immersed tube 12 is transversely and longitudinally pulled in the horizontal direction by controlling the transverse cable adjusting winch 13 and the longitudinal cable adjusting winch 15 to reach a preset position, namely, the pulleys 9 suspended by the first overhanging platform 311 and the second overhanging platform 321 can vertically correspond to the suspension ropes 10 one by one.
And D, performing the step D: and controlling the 200 second pulleys 9 to descend to the upper surfaces of the immersed tubes 12 to be respectively connected with the corresponding slings 10 in a plug-in manner, so as to finish the serial connection of the hoisting of the immersed tubes 12.
And E, carrying out the step E: the operation control system 8 starts the winches 4 on the first buoyancy tank platform 31 and the second buoyancy tank platform 32 to drive the immersed tube 12 to ascend until the top surface of the immersed tube 12 is just abutted and fixed with the positioning piers 7, the immersed tube 12 reaches the draft depth set to be 5.0m, and if deviation exists, adjustment is carried out through the stored water in the first buoyancy tank 1 and the second buoyancy tank 2; or the first buoyancy tank 1 and the second buoyancy tank 2 are simultaneously and uniformly pressurized to enable the floating device to sink in a balanced mode until the positioning pier 7 abuts against the top surface of the immersed tube 12, the winch 4 is operated to tighten the lifting rope 5 at the same time until the stress of the lifting rope 5 is smaller than or equal to 10% of set tension, then the first buoyancy tank 1 and the second buoyancy tank 2 are simultaneously and uniformly drained and floated, and the immersed tube 12 is lifted to the draft with the set depth of 5.0 m;
and F, carrying out: and tightening the transverse adjusting cable 14 and the longitudinal adjusting cable 16, keeping the hoisting state of the floating device on the immersed tube 12, simultaneously keeping the transverse adjusting cable 14 and the longitudinal adjusting cable 16 to pull and fix the immersed tube 12, fixing a towing wheel and a cable pile 18 of the floating device by using a cable, and towing the floating device by using the towing wheel to finish the whole transportation path of the immersed tube 12.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a floating transportation device of immersed tube, its characterized in that, includes relative flotation tank one (1) and flotation tank two (2) that set up, flotation tank one (1) with the top of flotation tank two (2) is connected with operation platform (3) jointly, operation platform (3) include flotation tank platform one (31), flotation tank platform two (32) and connect crossbeam (33), flotation tank platform one (31) are located on flotation tank one (1), flotation tank platform one (31) have stretch by overhang platform one (311) that stretches out flotation tank one (1) medial surface, flotation tank platform two (32) are located on flotation tank two (2), flotation tank platform two (32) have stretch by overhang platform two (321) that stretch out flotation tank two (2) medial surface, the bottom surface of operation platform (3), the medial surface of flotation tank one (1) with form the immersed tube between the medial surface of flotation tank two (2) and place the space, the floating box type underground pipeline dredging device is characterized in that a winch (4) and a lifting rope (5) are arranged on the first floating box platform (31) and the second floating box platform (32), a single-row or multi-row first pulley (6) is symmetrically arranged on the first overhanging platform (311) and the second overhanging platform (321), one end of the lifting rope (5) is connected with the winch (4), and the other end of the lifting rope (5) is connected with a plurality of first pulleys (6) and then a sinking pipe (12) is hoisted.
2. The floating transportation device for immersed tube according to claim 1, characterized in that the bottom surface of the operation platform (3) is further provided with a positioning pier (7), the positioning pier (7) is positioned in the immersed tube placing space, the positioning pier (7) is provided with a protective pad, and the positioning pier (7) is used for abutting against the immersed tube (12).
3. The floating transportation apparatus for immersed tube according to claim 1, wherein a plurality of said connecting beams (33) are provided at intervals between said first overhanging platform (311) and said second overhanging platform (321).
4. The floating transportation device for immersed tubes according to claim 1, further comprising a second trolley (9), a sling (10) and a hanging plate (11), wherein the second trolley (9) is arranged below the first trolley (6), the hanging rope (5) can vertically connect the first trolley (6) and the second trolley (9), the second trolley (9) is used as a hanging point of the immersed tube (12), the sling (10) vertically connects the hanging plate (11) and the second trolley (9), and the hanging plate (11) is used for abutting against the lower surface of the immersed tube (12).
5. The floating transportation device for immersed tube according to claim 4, wherein the distance between the first buoyancy tank (1) and the second buoyancy tank (2) is reserved with a safety clearance corresponding to the width of the immersed tube (12), and the first trolleys (6) are arranged in a row along the length direction of the immersed tube placing space.
6. The floating transportation device for the immersed tube according to claim 1, wherein two winches (4) are arranged on the first buoyancy tank platform (31) and the second buoyancy tank platform (32), the winches (4) transversely correspond to the head end and the tail end of the first trolley (6) which are arranged in rows, the two winches (4) of the first buoyancy tank platform (31) are connected with two ends of one lifting rope (5), and the two winches (4) of the second buoyancy tank platform (32) are connected with two ends of the other lifting rope (5).
7. The floating transportation device for immersed tube according to claim 1, characterized in that a control system (8) is further provided on the operation platform (3), the control system (8) is electrically connected with the winch (4), and the control system (8) is located on the first buoyancy tank platform (31) and/or the second buoyancy tank platform (32).
8. The floating transportation device for the immersed tube according to claim 1, wherein the two ends of the first buoyancy tank (1) and the second buoyancy tank (2) along the long edge are respectively provided with a horizontal cable adjusting winch (13), the horizontal cable adjusting winch (13) is connected with a horizontal cable adjusting (14), the horizontal cable adjusting (14) is used for connecting the corners of the top surface of the immersed tube (12), the connecting beam (33) is provided with a longitudinal cable adjusting winch (15), the longitudinal cable adjusting winch (15) is connected with a longitudinal cable adjusting (16), and the longitudinal cable adjusting (16) is used for connecting the longitudinal pull point of the top surface of the immersed tube (12).
9. A method for transporting a immersed tube, wherein a floating device for an immersed tube according to any one of claims 4 to 8 is used, comprising the steps of:
A. setting the required pulling force of a winch (4) on the floating device and the number of hoisting points of the immersed tube (12);
B. correspondingly arranging a corresponding number of hoisting points on the immersed tube (12), arranging a plurality of first pulleys (6) on the floating device according to the number and the positions of the hoisting points, connecting the plurality of first pulleys (6) in series by using a hoisting rope (5), connecting a second pulley (9) in series between every two adjacent first pulleys (6), and suspending the plurality of second pulleys (9) below the first pulleys (6) through the hoisting rope (5);
C. after the immersed tube (12) is launched for floating, the floating device is pulled to the position above the immersed tube (12), the horizontal position of the immersed tube (12) is adjusted, and a second pulley (9) is vertically corresponding to a sling (10) of each lifting point of the immersed tube (12);
D. controlling the plurality of second pulleys (9) to descend to the upper surface of the immersed tube (12) to be connected with the sling (10) so as to finish the serial connection of the hoisting of the immersed tube (12);
E. the winch (4) is operated to pull the lifting rope (5) according to the set pulling force, and the immersed tube (12) is driven to ascend and is abutted to the positioning pier (7); or the first buoyancy tank (1) and the second buoyancy tank (2) are operated to press water, the floating transportation device is sunk until the positioning pier (7) is abutted against the immersed tube (12), and then the floating transportation device drains water, floats and lifts the immersed tube (12);
F. and (3) keeping the hoisting state of the floating transportation device on the immersed tube (12), and dragging the floating transportation device to move by using a tugboat to finish the transportation of the immersed tube (12).
10. The method for transporting immersed tube according to claim 9, wherein in the step A, the method for designing the required pulling force of the winch (4) on the floating device and the number of hoisting points of the immersed tube (12) comprises the following steps:
a1, determining the draft after the immersed tube (12) is hoisted according to the channel depth on site, wherein the draft after the immersed tube (12) is hoisted exceeds half of the draft before the immersed tube (12) is hoisted;
a2, calculating the calibration lifting force required by the immersed tube (12) according to the draft after the immersed tube (12) is hoisted;
a3, determining the pulling force and the number of hoisting points of the winch (4) according to the calibrated hoisting force and the combination of actual working conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111478909.4A CN114348871A (en) | 2021-11-29 | 2021-11-29 | Floating transportation device and transportation method for immersed tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111478909.4A CN114348871A (en) | 2021-11-29 | 2021-11-29 | Floating transportation device and transportation method for immersed tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115855029A (en) * | 2023-02-27 | 2023-03-28 | 中交第一航务工程局有限公司 | Pipe section sinking coarse positioning system and method based on sling of immersed pipe transporting integrated ship |
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2021
- 2021-11-29 CN CN202111478909.4A patent/CN114348871A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115855029A (en) * | 2023-02-27 | 2023-03-28 | 中交第一航务工程局有限公司 | Pipe section sinking coarse positioning system and method based on sling of immersed pipe transporting integrated ship |
| CN115855029B (en) * | 2023-02-27 | 2023-04-28 | 中交第一航务工程局有限公司 | Pipe joint sinking coarse positioning system and method based on sinking pipe transportation and installation integrated ship sling |
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