CN109607248B - Slippage ship unloading construction method suitable for large member in tidal water area - Google Patents
Slippage ship unloading construction method suitable for large member in tidal water area Download PDFInfo
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- CN109607248B CN109607248B CN201811434349.0A CN201811434349A CN109607248B CN 109607248 B CN109607248 B CN 109607248B CN 201811434349 A CN201811434349 A CN 201811434349A CN 109607248 B CN109607248 B CN 109607248B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/60—Loading or unloading ships
- B65G67/603—Loading or unloading ships using devices specially adapted for articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
Abstract
The invention provides a construction method for slipping and unloading a large member applicable to tidal waters; this patent mainly utilizes the landing stage platform that slides, high tide level butt joint track, high and flat tide level horizontal locking track, and the inboard water injection technique, hoist engine synchronous traction technique are slided and are unloaded the ship ashore. This patent has solved that bridge site position is big in tidal zone water head, cross sectional dimension is big, the segment weight is heavy and receive a great deal of restrictive condition steel truss slippage ship unloading problem such as aviation limit for height, clean height of navigation, for this type of steel truss ship unloading provides new thinking, adapts to the bridge and is located the regional various steel truss members of waters or the construction of unloading such as segment for the ship unloading technique that slides can be to higher technical merit development.
Description
Technical Field
The invention relates to a large member sliding ship unloading construction method, in particular to a large member sliding ship unloading construction method applicable to tidal waters.
Background
At present, in the translation loading and unloading construction of large goods at wharfs at home and abroad, the ship body of a transport ship is injected with water in different bins to keep the balance of the ship body and the influence of tide, or a large floating crane ship is hired for anchoring operation, although the construction process is advanced, the cost is high, and the operation can be finished by professional construction operation teams.
Disclosure of Invention
Therefore, in order to solve the above-mentioned disadvantages, the present invention provides a method for constructing a gliding ship unloading of a large member in tidal waters; this patent mainly utilizes the landing stage platform that slides, high tide level butt joint track, high and flat tide level horizontal locking track, and the inboard water injection technique, hoist engine synchronous traction technique are slided and are unloaded the ship ashore.
This patent has solved that bridge site position is big in tidal zone water head, cross sectional dimension is big, the segment weight is heavy and receive a great deal of restrictive condition steel truss slippage ship unloading problem such as aviation limit for height, clean height of navigation, for this type of steel truss ship unloading provides new thinking, adapts to the bridge and is located the regional various steel truss members of waters or the construction of unloading such as segment for the ship unloading technique that slides can be to higher technical merit development.
The invention is realized in this way, and the construction method for constructing the large-scale member sliding ship unloading suitable for tidal waters is characterized in that: the main construction process flow is as follows: the construction of the sliding trestle is finished → the installation of the sliding track → the arrangement of a winch → the arrival of a transport ship → the butt joint of high tide level, the track is locked to keep on a line → high and flat tide is utilized, the hydraulic anchor is buckled to horizontally lock a track beam → the winch is started, the synchronous slow traction is carried out until a third pivot is paused → the tide level is waited, the water in a loading cabin is adjusted to ensure that the height difference of the left and right chords of the trestle is not more than 5cm → the winch is started, the steel truss beam is synchronously and slowly pulled to the upper bank → the hydraulic mooring system is removed, the ship leaves the bank, and the traction is finished; specifically, the method comprises the following steps of;
1) construction preparation: the beam section is moved to the installation position through a temporary plank road, a transport ship needs to stop at the position of a sliding platform on two banks of a channel, the beam section is slid onto the plank road after butt joint is completed, in order to avoid the impact force when the transport ship stops, the sliding trestle platform needs to be provided with an anti-collision guard string, and two sides are provided with tying piles;
2) the parking mode is as follows: the deck barge is transported by 2000t grade, the deck barge slowly leans against a wharf under the command of a technician, the approaching speed is no more than 2m/min, the deck barge is subjected to throwing and aiming after entering a construction area, and a steel pipe with the diameter of 800mm is adopted as a throwing and anchoring positioning pile; the measuring personnel perform elevation measurement on the left and right side rails on the ship to ensure that the left and right side rails are kept horizontal, and if the left and right side rails are uneven, the rails are leveled through a load adjusting system of the ship; obtaining daily high tide levels by a tide meter, and connecting the pulley block group with the lug plate on the member by a30 t chain block when tide water is returned from the high tide levels to the position where the sliding rail on the ship is 10cm higher than the wharf rail, so that the ship sliding rail is aligned with and fixed to the wharf rail; meanwhile, a welder quickly cuts off the temporary fixing system for preventing the steel truss girder from sliding on the track. The transportation ship track extends 650mm out of the ship edge near the butt joint end to form a transition beam, and needs to be in butt joint with the track on the sliding platform;
3) fixing the lap joint: in the process that the beam section moves from the transport ship to the sliding ship unloading platform, the butt joint of the rails of the beam section is subjected to outward extrusion force, so that the butt joint needs to be in rigid connection to prevent the butt joint rails from being disconnected; the fixing piece between the rails needs to bear 150t of pulling force calculated according to the total tilting weight;
4) preparation before lapping: before the transport ship is butted, the following preparation work is required:
(1) checking a tide meter, arranging a water level observation ruler in the bridge site area, and determining the lap joint time;
(2) the traction equipment is prepared in place, and when the tracks are well lapped, the track is immediately subjected to sliding work, so that the influence of tide time on the sliding is reduced;
(3) checking whether the water discharge equipment is intact, and preparing to carry out ballast loading and load shedding of the transport ship at any time;
5) sliding the beam section: when the sliding tracks are well butted, locking the axes of the tracks along the bridge direction through a winch, and immediately buckling and locking the anchors at the inner sides of the tracks at a high-level tide position to prevent the beam section from displacing in the sliding process, and then respectively hanging a traction rope and a reverse traction rope on lifting lugs of the beam section for preparing traction; before traction, the unloading of the transport ship is required to ensure that the height of the sliding track of the transport ship is consistent with the height of the sliding platform track;
before the steel truss girder slides, butter is used for covering ship tracks and wharf tracks, and resistance generated by sliding friction is reduced. Because the static friction force is larger when the steel truss girder initially slides, a reaction frame can be added on the track at the rear end of the steel truss girder support, and a30 t screw jack is used for assisting initial sliding, so that the starting force of a winch is reduced;
in the sliding process of the steel truss girder segment, the winch should synchronously carry out uniform traction, commanders constantly pay attention to the scale reading of the segment ends on the sliding tracks on the left side and the right side, the scale reading on the left side and the right side is kept the same, the sliding blocks on the left side and the right side are led to be in parallel traction with the tracks, the steel truss girder is guaranteed not to sideslip and swing when sliding, and the steel truss girder and the sliding blocks are guaranteed not to slip;
in the sliding process of the steel truss girder segment, when a sliding block is about to slide to a wharf rail, slowly stopping sliding operation, then injecting water into a cabin close to the wharf side compartment, wherein the amount of the injected water is consistent with the counter force of a sliding block fulcrum, so that the ship load mutation after the sliding block comes ashore can prevent the ship from generating large draft difference, the sliding rail is measured and observed synchronously, and the height difference of the sliding rail is less than or equal to 5 cm;
and when the synchronous slow traction is suspended to a third pivot, the tidal level is waited, and the water in the load-adjusting cabin is adjusted to ensure that the height difference of the left and right chords of the trestle is less than or equal to 5cm, the synchronous slow traction steel truss girder is pulled to the upper bank, the hydraulic mooring buckling system is removed, the ship is pulled off the bank, and the traction is finished.
The process principle of the patent is as follows: the steel truss girder translation ship unloading construction method utilizes the time interval of the flat tide between rising and falling tides to move the steel box girder from a transport ship to a trestle platform. The conversion among all processes is realized rapidly in a short time, so that the steel box girder can go to the shore smoothly. And strictly forbidding ship unloading operation under the condition that the tide-levelling time is shorter than 1 hour so as to avoid safety accidents.
Because bridge position areas of bridges and wiring projects (main bridges) in the three-officer hall in Ningbo city are influenced by half-day tides, the tides are calmed 4 times a day and night, and the tide level difference changes greatly. The elevation of the top surface of the rail of the sliding trestle is determined by taking the height from the ship board to the water surface of the steel truss girder transport ship in full-load and no-load states as a reference, so that the minimum difference of the butt joint elevation of the steel box girder ship unloading rail is ensured. When the steel truss girder is used for shipping, a transverse moving track is arranged, and a hydraulic anchor buckling cross beam is arranged at the mooring end of the sliding track.
And after the steel truss girder transport ship arrives at a construction site, selecting a time period with longer flat tide time according to a tide schedule to carry out translational ship unloading construction. And moving the transport ship to the outer side of the temporary sliding platform in the high tide, aligning the sliding track beam to keep the sliding track beam on the same axis, aligning the sliding track and the steel truss beam transverse moving track in the high tide and the low tide, and connecting and fixing by adopting a hydraulic anchor. And starting a winch, synchronously and slowly pulling the sliding pile shoe of the steel truss girder to a third pivot for suspension, waiting for the tide level, regulating the water in the cabin to ensure that the height difference of the left chord and the right chord of the trestle is less than or equal to 5cm until the steel truss girder reaches the upper bank, removing the hydraulic mooring system, and enabling the ship to leave the bank to finish traction.
The construction process flow and the operation key points are as follows: the construction of the sliding trestle is finished → the installation of the sliding track → the arrangement of a winch → the arrival of a transport ship → the butt joint of high tide level, the track is locked to keep on a line → high level tide is utilized, the hydraulic anchor is buckled to horizontally lock the track beam → the winch is started, the synchronous slow traction is carried out until a third pivot is paused → the tide level is waited, the water in the loading cabin is adjusted to ensure that the height difference of the left and right chords of the trestle is not more than 5cm → the winch is started, the steel truss beam is synchronously and slowly pulled to the upper shore → the hydraulic mooring system is removed, the ship leaves the shore, and the traction is finished.
The invention has the following advantages: the invention provides a construction method for slipping and unloading a large member applicable to tidal waters; this patent mainly utilizes the landing stage platform that slides, high tide level butt joint track, high and flat tide level horizontal locking track, and the inboard water injection technique, hoist engine synchronous traction technique are slided and are unloaded the ship ashore. This patent has solved that bridge site position is big in tidal zone water head, cross sectional dimension is big, the segment weight is heavy and receive a great deal of restrictive condition steel truss slippage ship unloading problem such as aviation limit for height, clean height of navigation, for this type of steel truss ship unloading provides new thinking, adapts to the bridge and is located the regional various steel truss members of waters or the construction of unloading such as segment for the ship unloading technique that slides can be to higher technical merit development.
The construction method is safe, stable and reliable in the sliding ship unloading construction of the steel truss girder of the bridge and the wiring engineering (main bridge) in the three-officer hall, has high construction quality and efficiency, strong applicability and controllable measure cost, avoids the restriction factors of blocking a channel and limiting the height of aviation by using a floating crane ship for anchoring construction, avoids high floating crane cost, saves the engineering cost by about 1200 more ten thousand yuan, and has remarkable economic benefit.
Drawings
FIG. 1 is a flow chart of a steel truss girder ship unloading construction process;
FIG. 2 is a schematic view of a bumper chord arrangement;
FIG. 3 is a schematic illustration of docking of a vessel;
FIG. 4 is a sliding floor plan of steel truss girder segments.
Wherein: the device comprises a gantry 1, a sliding track 2, an anti-collision protective string 3, a gantry crane track 4, a bracket 5, a hydraulic anchor fastening system 6, a steel truss girder transportation barge 7, a barge track 8 and a traction system 9.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 4, and the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a slippage ship unloading construction method for large members applicable to tidal waters by improving the slippage ship unloading construction method; the main construction process flow is as follows: the construction of the sliding trestle is finished → the installation of the sliding track → the arrangement of a winch → the arrival of a transport ship → the butt joint of high tide level, the track is locked to keep on a line → high level tide is utilized, the hydraulic anchor is buckled to horizontally lock the track beam → the winch is started, the synchronous slow traction is carried out until a third pivot is paused → the tide level is waited, the water in the loading cabin is adjusted to ensure that the height difference of the left and right chords of the trestle is not more than 5cm → the winch is started, the steel truss beam is synchronously and slowly pulled to the upper shore → the hydraulic mooring system is removed, the ship leaves the shore, and the traction is finished. The specific operation is as follows;
1) construction preparation: the beam section is moved to the mounting position through a temporary plank road, a transport ship needs to stop at the position of a sliding platform on two sides of a channel, the beam section is slid onto the plank road after butt joint is completed, in order to avoid the impact force when the transport ship stops, the sliding platform needs to be provided with anti-collision guard strings, two sides are provided with tying piles, and the impact force standard value is determined according to the effective impact energy of the ship, the performance curve of a rubber fender and the rigidity of a berth structure according to the stipulation of Port load regulations. In the calculation, the mass of the ship is 4000t,
the total number of the rubber protective strings is 6, the uneven coefficient is considered to be 0.65, the impact energy E0 of a single rubber protective string is as follows: e0=92/6/0.65 ≈ 24KJ, the rubber fender adopts DA-A300H, and the impact force standard value is 150kN according to the performance curve. Meets the design and construction requirements. The tying pile is selected according to the regulation of 10.2.5 in Harbour lotus regulations. As shown in fig. 2.
2) The parking mode is as follows: the bridge and the steel truss girder segment of the wiring engineering (main bridge) of the three-officer hall are transported by adopting 2000 t-level deck barge, the deck barge slowly leans against a wharf under the command of a technician, the approaching speed is no more than 2m/min, after the deck barge enters a construction area, the deck barge is subjected to throwing and aiming, and a throwing and anchoring positioning pile adopts a steel pipe with the diameter of 800 mm. The measuring personnel carry out elevation measurement on the left and right side rails on the ship to ensure that the left and right side rails are kept horizontal, and if the left and right side rails are uneven, the rails are leveled through a load adjusting system of the ship. And obtaining the daily high tide level by a tide meter, and connecting the pulley block group with the lug plate on the member by a30 t chain block when the tide water is returned from the high tide level to the ship with the sliding track 10cm higher than the wharf track, so that the ship sliding track is aligned with and fixed to the wharf track. Meanwhile, a welder quickly cuts off the temporary fixing system for preventing the steel truss girder from sliding on the track. The transportation ship track extends 650mm beyond the ship edge near the butt joint end to be a transition beam and needs to be in butt joint with the track on the sliding platform.
3) Fixing the lap joint: during the movement of the beam section from the carrier to the skid-steer ship platform, the rail butt joints are subjected to outward compressive forces, and therefore rigid connections are required at the butt joints to prevent the butt rails from disengaging. The fixing piece between the rails needs to bear 150t of pulling force calculated according to the total tilting weight;
4) preparation before lapping: before the transport ship is butted, the following preparation work is required:
(1) checking a tide meter, arranging a water level observation ruler in the bridge site area, and determining the lap joint time;
(2) traction equipment such as a shackle, a pulley, a guide wheel and the like is prepared in place, and when the track is well lapped, the sliding work is carried out immediately, so that the influence of tide time on the sliding is reduced;
(3) and checking whether the water discharge equipment is intact, and preparing for ballasting and deloading of the transport ship at any time.
5) Sliding the beam section: when the sliding track is well butted, the axis of the track is locked along the bridge direction through a winch, the inner side of the track is immediately buckled with an anchor at a high-level tide position, the beam section is prevented from displacing in the sliding process, and then the traction rope and the reverse traction rope are respectively hung on the lifting lugs of the beam section to prepare for traction. Before traction, the load of the transport ship needs to be reduced so as to ensure that the height of the sliding track of the transport ship is consistent with the height of the sliding platform track.
Before the steel truss girder slides, butter is used for covering ship tracks and wharf tracks, and resistance generated by sliding friction is reduced. Because the static friction force of the steel truss girder is larger when the steel truss girder initially slides, a reaction frame can be added on the track at the rear end of the steel truss girder support, and a30 t screw jack is used for assisting initial sliding, so that the starting force of a winch is reduced.
During the sliding process of the steel truss girder segment, the winch should synchronously carry out uniform traction, commanders constantly pay attention to scale readings of segment ends on sliding rails on the left side and the right side, the scale readings on the left side and the right side are kept the same, a sliding block on the left side and the right side is led to be in parallel traction with the rails, the steel truss girder is guaranteed not to sideslip and swing when sliding, and the steel truss girder and the sliding block are guaranteed not to slip.
In the sliding process of the steel truss girder segment, when a sliding block is about to slide to the wharf rail, the sliding operation is stopped slowly, then water is injected into the side separation cabin close to the wharf of the cabin, the water injection amount is consistent with the counter force of the sliding block fulcrum, so that the ship load mutation after the sliding block goes ashore can be prevented from generating large draft difference, the sliding rail is observed synchronously in measurement, and the height difference of the sliding rail is less than or equal to 5 cm.
And when the synchronous slow traction is suspended to a third pivot, the tidal level is waited, and the water in the load-adjusting cabin is adjusted to ensure that the height difference of the left and right chords of the trestle is less than or equal to 5cm, the synchronous slow traction steel truss girder is pulled to the upper bank, the hydraulic mooring buckling system is removed, the ship is pulled off the bank, and the traction is finished.
The patent is applicable to the restriction factors of shallow water depth after the ship unloading wharf is ebbed, large tide influence on the water area, high aviation limitation and the like, and the moved components have large volume and heavy weight. The tide level is accurately selected when construction is carried out under the influence of tides, construction time is reasonably arranged, each process is clearly divided into work, people are responsible, and each link is ensured to be in a controlled state. The construction method has the advantages of low construction investment, low cost and wide applicability.
FIG. 3 is a schematic illustration of docking of a ship upon docking, in operation;
firstly, transporting to a bridge position, selecting a high tide level for butt joint, locking a self-locking device, adjusting to the position in high and low tide, anchoring and fixing to increase safe storage.
Secondly, a winch traction system is hung in a buckling mode, the sliding groove is coated with butter, the traction system is initially operated, the traction rope is straightened, and the inspection and the confirmation are carried out again.
③ the traction force is designed according to 650T multiplied by 0.04/2= 13T. And the traction force of the winch is 10t, the pulley block is wound according to 4 lines, and the actual traction force of the winch is 13/4=3.25t.
Fourthly, after the inspection is finished, the winch is started again, the traction speed is controlled to be 2m/min, when the front supporting point is dragged to the trestle, the speed is reduced to 1m/min until the second supporting point reaches the trestle platform, the balance of the ship body is observed, and water is injected to the right side of the ship body (the side cabin far away from the trestle is suitable for keeping the balance of the ship body, and the water is injected in the process of keeping the balance of the ship body constantly).
Controlling the subsequent traction speed to be 1m/min until the third pivot translates to the landing stage platform, suspending traction, injecting water into the side cabin close to the landing stage, and keeping the balance of the ship body. )
How to keep the traction synchronous: the sliding tracks are provided with scale lines at intervals of 50cm, and a commander can synchronously observe the sliding tracks during traction.
And seventhly, after the water is injected into the ship body in a balanced mode, a fifth fulcrum is pulled to the trestle platform, sliding ship unloading work is completed, and hoisting work is carried out.
Application example: the bridge and the wiring engineering (main bridge) steel truss unloading wharf of the Ningbo city three-office are positioned on two sides of the channel, the water level change is large under the influence of tide in the construction water area, the steel truss girder section of the bridge which needs to be translated ashore has the weight of 480 t-600 t, and the structural size is as follows: length × width × height = (15 to 16.7) × (33.7 × (22 to 25) m. When the beam section unloads, the transport ship is rigidly connected with the wharf, so that the ship does not incline greatly when the beam section moves, and the ship unloading track is not staggered. At present, in the translation loading and unloading construction of large goods at wharfs at home and abroad, the ship body of a transport ship is injected with water in different bins to keep the balance of the ship body and the influence of tide, or a large floating crane ship is hired for anchoring operation, although the construction process is advanced, the cost is high, and the operation can be finished by professional construction operation teams.
The construction method is safe, stable and reliable in the sliding ship unloading construction of the steel truss girder of the bridge and the wiring engineering (main bridge) in the three-officer hall, has high construction quality and efficiency, strong applicability and controllable measure cost, avoids the restriction factors of blocking a channel and limiting the height of aviation by using a floating crane ship for anchoring construction, avoids high floating crane cost, saves the engineering cost by about 1200 more ten thousand yuan, and has remarkable economic benefit.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A sliding ship unloading construction method for large members in tidal waters is characterized in that: the main construction process flow is as follows: the construction of the sliding trestle is finished → the installation of the sliding track → the arrangement of a winch → the arrival of a transport ship → the butt joint of high tide level, the track is locked to keep on a line → high and flat tide is utilized, the hydraulic anchor is buckled to horizontally lock a track beam → the winch is started, the synchronous slow traction is carried out until a third pivot is paused → the tide level is waited, the water in a loading cabin is adjusted to ensure that the height difference of the left and right chords of the trestle is not more than 5cm → the winch is started, the steel truss beam is synchronously and slowly pulled to the upper bank → the hydraulic mooring system is removed, the ship leaves the bank, and the traction is finished; specifically, the method comprises the following steps of;
1) construction preparation: unloading the beam section to the installation position through a sliding platform, moving the beam section to the installation position through a sliding trestle, stopping the transport ship at the position of the sliding platform on two sides of the river, sliding the beam section to the sliding platform after completing butt joint, setting anti-collision protective strings on the sliding platform in order to avoid the impact force when the transport ship stops, and setting cable-tying piles on two sides;
2) the parking mode is as follows: the deck barge is transported by 2000t grade, the deck barge slowly leans against a wharf under the command of a technician, the approaching speed is no more than 2m/min, the deck barge is subjected to throwing and aiming after entering a construction area, and a steel pipe with the diameter of 800mm is adopted as a throwing and anchoring positioning pile; the measuring personnel perform elevation measurement on the left and right side rails on the ship to ensure that the left and right side rails are kept horizontal, and if the left and right side rails are uneven, the rails are leveled through a load adjusting system of the ship; obtaining daily high tide levels by a tide meter, and connecting the pulley block group with an ear plate on a member by a chain block of 30t when tide water is returned from the high tide levels to the position that a sliding track on the ship is 10cm higher than a sliding platform track, so that the sliding track on the ship is aligned with and fixed to the sliding platform track; meanwhile, a welder quickly cuts off a temporary fixing system for preventing the steel truss girder from sliding on the track; the sliding rail on the ship extends 650mm out of the ship edge near the butt joint end to form a transition beam, and needs to be in butt joint with the sliding platform rail;
3) fixing the lap joint: in the process that the beam section moves from the transport ship to the sliding platform, the butt joint of the rails of the beam section is subjected to outward extrusion force, so that the butt joint needs to be in rigid connection to prevent the butt joint rails from being disconnected; the fixing piece between the rails needs to bear 150t of pulling force calculated according to the total tilting weight;
4) preparation before lapping: before the transport ship is docked, the following preparation work is required:
(1) checking a tide meter, arranging a water level observation ruler in the bridge site area, and determining the lap joint time;
(2) the traction equipment is prepared in place, and when the tracks are well lapped, the track is immediately subjected to sliding work, so that the influence of tide time on the sliding is reduced;
(3) checking whether the water discharge equipment is intact, and preparing to carry out ballast loading and load shedding of the transport ship at any time;
5) sliding the beam section: when the sliding tracks are well butted, locking the axes of the tracks along the bridge direction through a winch, and immediately buckling and locking the anchors at the inner sides of the tracks at a high-level tide position to prevent the beam section from displacing in the sliding process, and then respectively hanging a traction rope and a reverse traction rope on lifting lugs of the beam section for preparing traction; before traction, the load reduction of the transport ship is required to ensure that the height of a sliding track on the ship is consistent with the height of a sliding platform track;
before the steel truss girder slides, butter is used for covering a ship sliding track and a sliding platform track, so that the resistance generated by sliding friction is reduced;
because the static friction force is larger when the steel truss girder initially slides, a reaction frame can be added on the track at the rear end of the steel truss girder support, and a30 t screw jack is used for assisting initial sliding, so that the starting force of a winch is reduced;
in the sliding process of the steel truss girder segment, the winch should synchronously carry out uniform traction, commanders constantly pay attention to the scale reading of the segment ends on the sliding tracks on the left side and the right side, the scale reading on the left side and the right side is kept the same, the sliding blocks on the left side and the right side are led to be in parallel traction with the tracks, the steel truss girder is guaranteed not to sideslip and swing when sliding, and the steel truss girder and the sliding blocks are guaranteed not to slip;
in the sliding process of the steel truss girder segment, when a sliding block is about to slide to a sliding platform track, slowly stopping sliding operation, then injecting water into a side compartment of the ship cabin close to a wharf, wherein the amount of the injected water is consistent with the counter force of a sliding block fulcrum, so that the ship load mutation after the sliding block comes ashore can prevent the ship from generating large draft difference, the sliding track is measured and observed synchronously, and the height difference of the sliding track is less than or equal to 5 cm;
and when the synchronous slow traction is suspended to a third pivot, the tidal level is waited, and the water in the load-adjusting cabin is adjusted to ensure that the height difference of the left and right chords of the trestle is less than or equal to 5cm, the synchronous slow traction steel truss girder is pulled to the upper bank, the hydraulic mooring buckling system is removed, the ship is pulled off the bank, and the traction is finished.
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| CN112278195B (en) * | 2020-10-23 | 2022-07-05 | 中船黄埔文冲船舶有限公司 | Mooring method of roll-on/roll-off ship |
| CN114671265B (en) * | 2022-04-13 | 2023-10-20 | 中交路桥华南工程有限公司 | Intelligent weight shifting device |
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| DE3304526A1 (en) * | 1983-02-10 | 1984-08-16 | Howaldtswerke-Deutsche Werft Ag Hamburg Und Kiel, 2300 Kiel | Shipping of an offshore module |
| CN102127899B (en) * | 2010-12-30 | 2012-07-04 | 中铁大桥局集团第二工程有限公司 | System for lifting and sliding large-tonnage steel box girder in land area and shoal area and construction method thereof |
| CN102556691B (en) * | 2011-12-29 | 2014-01-15 | 武船重型工程股份有限公司 | Roll-on/roll-off shipping method for long large steel box girder segment across obstacles |
| CN202491911U (en) * | 2012-02-28 | 2012-10-17 | 大连理工大学 | Loading equipment floating state control device for land-sea connection transportation |
| KR101394498B1 (en) * | 2012-08-30 | 2014-05-14 | 주식회사 동방 | Load and unload system of roro ship the tide difference of high and low water |
| CN203158854U (en) * | 2013-03-12 | 2013-08-28 | 中交第二航务工程勘察设计院有限公司 | Dragging sliding device |
| CN105480387B (en) * | 2016-01-22 | 2018-06-12 | 上海振华重工(集团)股份有限公司 | Ship-building gantry crane entirety shipping methods |
| CN106275287A (en) * | 2016-09-05 | 2017-01-04 | 江苏中铁山桥重工有限公司 | A kind of large-scale truss whole sections shipment method |
| CN108216502A (en) * | 2018-01-18 | 2018-06-29 | 唐山航岛海洋重工有限公司 | A kind of pontoon bridge ro-ro transport system of open seashore |
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