CN113879487A - Non-self-floating immersed tube discharging method - Google Patents
Non-self-floating immersed tube discharging method Download PDFInfo
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- CN113879487A CN113879487A CN202111189149.5A CN202111189149A CN113879487A CN 113879487 A CN113879487 A CN 113879487A CN 202111189149 A CN202111189149 A CN 202111189149A CN 113879487 A CN113879487 A CN 113879487A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C3/00—Launching or hauling-out by landborne slipways; Slipways
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C3/00—Launching or hauling-out by landborne slipways; Slipways
- B63C3/06—Launching or hauling-out by landborne slipways; Slipways by vertical movement of vessel, i.e. by crane
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/063—Tunnels submerged into, or built in, open water
- E02D29/073—Tunnels or shuttering therefor assembled from sections individually sunk onto, or laid on, the water-bed, e.g. in a preformed trench
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Abstract
The invention relates to the technical field of immersed tube tunnels, in particular to a non-self-floating immersed tube discharging and refuting method. Compared with the traditional mode of directly twisting out the barge from the self-floating immersed tube, the invention utilizes the installation barge twisting out barge, the tube top of the non-self-floating immersed tube does not need to be provided with a mooring winch system, the tube top outfitting parts are fewer, and the outfitting operation procedures are fewer; compared with the traditional mode that secondary outfitting is carried out after the pipe joints are unloaded, the method positions the secondary outfitting operation on the semi-submerged barge before unloading, and changes the sequence of the secondary outfitting operation procedures, so that the non-self-floating immersed pipe does not need to be moored again after being taken out of the barge, and the operation procedures are simplified.
Description
Technical Field
The invention relates to the technical field of immersed tube tunnels, in particular to a non-self-floating immersed tube discharging and refuting method.
Background
The conventional immersed tube is a self-floating immersed tube, usually a dry dock is prefabricated, the dry dock is filled with water after the prefabrication is finished, the immersed tube can float naturally, and a steel wire rope with a cable in the dock is immersed into the tube for undocking the immersed tube; the self-floating immersed tube can be directly floated or towed to a convoluted water area for fitting-out and sinking operation, or can be quickly transported to the convoluted water area in a dry mode through a semi-submersible barge, and the immersed tube is directly transferred out of the barge and then temporarily moored in the convoluted water area for secondary fitting-out operation; the secondary outfitting of the self-floating immersed tube needs a crane ship and an engineering barge to be matched and completed, and the secondary outfitting operation comprises measuring tower installation, floating state calibration, tube top outfitting installation, lifting and hanging barge installation and the like.
The non-self-floating immersed tube is a novel immersed tube, namely a negative buoyancy immersed tube (for example, patent document with application number of CN 202011287920.8), and the dead weight of the non-self-floating immersed tube is larger than the buoyancy as the name suggests. Compared with the self-floating immersed tube, the non-self-floating immersed tube has the advantages that the structural height can be reduced to the maximum extent, the engineering quantities such as a main body structure and foundation trench backfill are saved, a freeboard adjusting layer is not required to be arranged, the prefabrication cost and the construction cost can be effectively saved, the design difficulty and the prefabrication difficulty are reduced, the fussy operation of adjusting the freeboard value in water in a floating transportation link can be avoided, the transportation time is favorably shortened, and the non-self-floating immersed tube has important popularization significance and good application prospect.
However, due to the characteristic that the self weight of the non-self-floating immersed tube is larger than the buoyancy, after the semi-submersible barge is used for dry transportation to a convoluted water area, the non-self-floating immersed tube cannot be directly stranded and moved out of the barge through a cable, which brings great difficulty to the transportation of the non-self-floating immersed tube, so that the appearance of the non-self-floating immersed tube is required to have a matching method different from the traditional self-floating immersed tube construction method.
Disclosure of Invention
The invention aims to: aiming at the problem that the prior art can not directly twist and move the non-self-floating immersed tube on the semi-submersible barge to discharge the barge, the non-self-floating immersed tube discharging method is provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
a non-self-floating immersed tube refuting method comprises the following steps:
firstly, after a non-self-floating immersed tube reaches a convoluted water area through transportation of a semi-submersible barge, submerging the semi-submersible barge until the non-self-floating immersed tube is submerged;
moving the mounting barge to a preset position above the non-self-floating immersed tube;
step three, butting and installing the barge and the non-self-floating immersed tube, and performing secondary outfitting operation;
and fourthly, the winch is moved, installed and refuted to drive the non-self-floating immersed tube to be discharged and refuted together.
The non-self-floating immersed tube discharging method provided by the invention submerges the non-self-floating immersed tube along with the semi-submerged barge, so that the mounting barge is sleeved in and connected with the non-self-floating immersed tube, provides a lifting force for the non-self-floating immersed tube by using the mounting barge, and drives the non-self-floating immersed tube to discharge together through twisting the mounting barge, thereby realizing the discharging/discharging barge of the non-self-floating immersed tube which cannot float automatically, and the process is simple and rapid.
The non-self-floating immersed tube can sink along with the semi-submersible barge, so that the barge-up direction of the installation barge is not limited to the traditional longitudinal barge-up alignment direction, and the barge can also be horizontally pulled along the semi-submersible barge; the submergence depth of the non-self-floating immersed tube along with the semi-submersible barge can be determined according to working conditions such as the barge entering direction, the water area condition, the draft depth and the like, but the interference between the barge and an immersed tube top outfitting piece is avoided when the barge is installed, and meanwhile, the upper structure of the tower on the semi-submersible barge is exposed out of the water surface, so that related equipment such as a winch system and a positioning system on the tower are positioned above the water surface for normal operation.
The method can realize safe refuge of the non-self-floating immersed tube, and compared with the traditional mode that the self-floating immersed tube is directly twisted out, the refuge is moved out by utilizing the mounting refuge twist, a mooring winch system is not required to be arranged on the tube top of the non-self-floating immersed tube, the number of outfitting pieces on the tube top is small, and the number of outfitting operation procedures is small; compared with the traditional mode of performing secondary outfitting after the pipe joints are unloaded, the method has the advantages that the secondary outfitting operation is performed on the semi-submerged barge before unloading, and the sequence of the secondary outfitting operation procedures is changed, so that the non-self-floating immersed pipes do not need to be moored again after being taken out of the barge, and the operation procedures are simplified; in addition, the installation barge can store the outfitting piece and other auxiliary facilities by utilizing the space on the installation barge, integrates the functions of installation, barge movement and outfitting for matching with the non-self-floating immersed tube discharging and barge process, does not need the matching of an engineering barge, has high efficiency and reduces the operation ships in a whirling water area.
Preferably, in the second step, the mounting barge is longitudinally stranded along the semi-submersible barge, and the method comprises the following steps:
a21, connecting various cable groups, wherein each cable group comprises a first cable group, a second cable group, a third cable group and a fourth cable group, the first cable group is arranged in a crossed manner, one end of the first cable group is connected with one end of the barge far away from the semi-submersible barge, and the other end of the first cable group is connected with a coastal anchor point; a second cable group is arranged in a crossed manner, one end of the second cable group is connected with one end of the mounting barge close to the semi-submersible barge, and the other end of the second cable group is connected with a first tower located on the semi-submersible barge close to one end of the mounting barge; a third cable group is arranged in a crossed manner, one end of the third cable group is connected with a second tower on the semi-submersible barge far away from one end of the installation barge, and the other end of the third cable group is connected with the installation barge; the cable group IV is oppositely arranged, one end of the cable group IV is connected with the second tower, and the other end of the cable group IV is connected with the mounting barge;
a22, driving the installation barge to be close to the semi-submersible barge by taking the cable group II as a main cable until the installation barge is positioned between two first tower buildings, and untying the cable and withdrawing the cable group II;
and A23, driving the installation barge to further advance by taking the cable group III as a main cable, gradually increasing the traction force of the cable group IV along with the advance of the installation barge, and simultaneously reducing the traction force of the cable group III until the installation barge is positioned at a preset position above the non-self-floating immersed tube.
The non-self-floating immersed tube discharging method provided by the invention is characterized in that in the process of longitudinal twisting movement of the installation barge along the semi-submersible barge, a first cable group, a second cable group and a third cable group are arranged in a cross connection mode, a fourth cable group is arranged oppositely, the transverse deviation of the tail part of the installation barge is controlled while the advancing speed of the installation barge is slowed down by pulling the first cable group, and the advancing displacement posture of the installation barge is adjusted; the cable group II is used for drawing the mounting barge in a short distance, provides main tension for the mounting barge before the mounting barge enters the semi-submersible barge, and adjusts the transverse offset for the mounting barge head part, so that the mounting barge cannot collide with tower buildings on two sides of the semi-submersible barge in the alignment process of the mounting barge and the semi-submersible barge; the third cable group is used for providing main tension for the installation barge just before alignment after the installation barge enters the semi-submersible barge, and simultaneously slowly controlling the transverse offset of the head part of the installation barge; after the installation is refuted and the displacement posture is adjusted to the right position through the first cable group, the second cable group and the third cable group, the tension of the fourth cable group is increased so as to accelerate the installation to refute the process of reaching the preset position, and then the installation is refuted and the butt joint of the non-self-floating immersed tube is conveniently realized.
Compared with the prior art, because no redundant barrier exists around the self-floating immersed tube which is refuted in water, the installation refute generally directly utilizes a plurality of engineering barges to pull and longitudinally sleeves the self-floating immersed tube for water butt joint, and the method has higher difficulty in installing the non-self-floating immersed tube which is refuted in the semi-submersible refute; the method utilizes a plurality of groups of cable sets to connect the semi-submersible barge and the mounting barge so as to control the advancing speed and the transverse offset of the mounting barge end to end, realize that the mounting barge smoothly enters the barge and reaches a preset position above the non-self-floating immersed tube, and avoid the collision between the mounting barge and a semi-submersible barge tower during the process of entering the barge.
Preferably, the non-self-floating immersed tube is provided with two measuring towers A, B and the calibration is completed in the stage of factory prefabrication before the step one, and the installation barge enters the semi-submerged barge along the transverse direction of the semi-submerged barge in the step two.
Compared with the longitudinal barge which can only be used for installing one side measuring tower in advance, the other side measuring tower relates to the underwater operation and floating state calibration of a non-self-floating immersed tube, the longitudinal barge is preferably installed and transversely barge is arranged, the measuring towers at the head and the tail of the immersed tube can be installed in advance, the measuring towers do not need to be installed during secondary outfitting, the workload of a convoluted water area is reduced, the underwater operation and floating state calibration are avoided, and the construction operation difficulty is favorably reduced.
Preferably, in the second step, the transversely-twisting the mounting barge along the semi-submersible barge comprises the following steps:
b21, connecting various cable groups, wherein each cable group comprises a cable group five, a cable group six and a cable group seven, the cable group five is arranged in a crossed manner, one end of the cable group five is connected with one end of the installation barge far away from the semi-submersible barge, and the other end of the cable group five is connected with a coastal anchor point; one end of the cable group six is connected with one side of the installation barge close to the semi-submersible barge, and the other end of the cable group six is connected with one side of the semi-submersible barge far away from the installation barge in a cross manner; the cable group seven is oppositely arranged, one end of the cable group seven is connected with the installation barge, the other end of the cable group seven is connected with the cabled boat, and the cabled boat is in place at the side of the semi-submersible barge far away from the installation barge;
b22, in the process of transverse alignment of the installation barge and the semi-submersible barge, driving the installation barge to approach the non-self-floating immersed tube by taking the cable group six as a main cable;
and B23, driving the installation barge to further advance by taking the cable group seven as a main cable, and gradually increasing the traction force of the cable group seven and simultaneously reducing the traction force of the cable group six along with the advance of the installation barge until the installation barge is positioned at a preset position above the non-self-floating sinking pipe.
According to the non-self-floating immersed tube discharging and refuting method provided by the invention, in the process of transversely twisting and moving the mounting refuting along the semi-submersible refuting, the cable group five and the cable group six are arranged in a crossed manner, the cable group seven is arranged oppositely, the transverse deviation of the tail part of the mounting refuting is controlled while the advancing speed of the mounting refuting is slowed down by pulling the cable group five, and the advancing displacement posture of the mounting refuting is adjusted; the cable group six is used for slowly dragging the installation barge to advance, and slowly controlling the longitudinal deviation of the advancing side of the installation barge in the in-place process, so that the collision between the head and the tail of the installation barge and a semi-submersible barge tower in the in-place process is avoided; when the forward postures of the installation barge are basically in place by adjusting the fifth cable group and the sixth cable group, the mooring boat is driven to move forward to increase the tension of the seventh cable group, so that the process of the installation barge reaching a preset position is accelerated, and the butt joint of the installation barge and a non-self-floating immersed tube is convenient to realize. The installation barge adopts a small number of cable groups which enter the barge transversely, and the control is simpler and quicker.
Preferably, the side surface of the first lifting lug of the non-self-floating immersed tube is provided with a butt joint limiting device which is open upwards; the mounting plug is provided with a lifting appliance, the side surface of a second lifting lug of the lifting appliance is provided with a guide cylinder with the same size as the lug hole, a pin shaft is arranged in the guide cylinder in a sliding manner, the outer end of the pin shaft is connected with a pushing component, and the pushing component is used for driving the pin shaft to move along the axial direction of the guide cylinder and pushing the pin shaft into the butt joint lug holes of the first lifting lug and the second lifting lug; the butt joint limiting device is used for providing guiding and butt joint limiting position reference for the second lifting lug;
when the barge and the non-self-floating immersed tube are installed in a butt joint mode in the third step, the method comprises the following steps of connecting a lifting point hanger underwater:
firstly, vertically positioning, and moving the mounting winch to a position where the second lifting lug is vertically aligned with the first lifting lug;
horizontally positioning, lowering the lifting appliance, wherein the lifting appliance enters an open space of the butt joint limiting device, and when the second lifting lug is lowered to abut against the butt joint limiting device, the second lifting lug is horizontally aligned with the lug hole of the first lifting lug, namely, the pin shaft can pass through the lug holes of the first lifting lug and the second lifting lug;
and driving the pushing component to push the pin shaft to butt the second lifting lug with the first lifting lug.
Compared with the traditional connection of the hoisting point hanger of the self-floating immersed tube above the water surface, the connection of the underwater hoisting point hanger is simple and easy to operate and small in butt joint difficulty; due to the influence of factors such as waves, water flow and wind current, the installation is refuted and can be rocked in the butt joint process with the non-self-floating immersed tube, and the butt joint process is carried out underwater, so that the dislocation can be generated between the holes when the installation is refuted and the hanger is connected with the immersed tube hanging point, and the butt joint can not be completed.
According to the invention, the butt joint limiting device with guiding and lower limiting functions is arranged at the immersed tube lifting lug, so that the lifting appliance and a lifting point can be quickly positioned; according to the invention, the winch is firstly moved, the barge is installed and positioned vertically, the second lifting lug can be correspondingly led in from the opening of the butt joint limiting device when the sling is installed and lowered, the positioning mode is more reasonable, the influence of up-and-down fluctuation and horizontal shaking of a ship can be favorably reduced, and in the horizontal alignment process of the lower sling, when the second lifting lug is abutted to the butt joint limiting device, the pushing part can push the pin shaft into the butt joint lug holes of the second lifting lug and the first lifting lug, so that automatic butt joint is realized.
Preferably, in the third step, the pushing component is a hydraulic oil cylinder, whether the pin shaft is pushed in place is judged by the pressure of a hydraulic system, and then the pin shaft is detected and confirmed by a diver.
Preferably, the butt joint limiting device is a U-shaped part, the size of an opening of the U-shaped part is gradually reduced from top to bottom, and when the second lifting lug reaches a position capable of being in butt joint with the first lifting lug, the second lifting lug is located inside the U-shaped part and is in contact with the U-shaped part.
After the installation barge is vertically positioned, the installation barge hanger is lowered to enable the second lifting lug to enter an opening of the butt joint limiting device for preliminary limiting; then at the transfer in-process of horizontal positioning, utilize the uncovered size that butt joint stop device progressively reduced, reduce the range of rocking of second lug gradually, when second lug and U type spare were matched with, then the second lug can dock with first lug relatively, realized installing and refute quick the position and the butt joint of looking for of hoist and immersed tube hoisting point, the connection of hoisting point does not receive the influence that boats and ships fluctuation and level rocked.
Preferably, the lower part of the mounting barge is provided with a steel buttress, and the upper part of the non-self-floating immersed tube is provided with a clamping groove matched with the steel buttress;
and after the second lifting lug is in butt joint with the first lifting lug, lifting the non-self-floating immersed tube to a steel buttress to be clamped with the clamping groove by using a lifting tool, and then performing the fourth step. The non-self-floating immersed tube hoisting device is connected with the non-self-floating immersed tube by the mounting barge hoisting tool, the hoisting winch on the mounting barge is used for providing clamping pre-tightening force for the steel buttress and the clamping groove, friction force can be generated between the mounting barge and the non-self-floating immersed tube when the winch is moved to mount and dismount the barge, the friction force is used for driving the non-self-floating immersed tube to simultaneously discharge and dismount the barge, and the discharging operation of the non-self-floating immersed tube is realized.
Preferably, in the step one, the semi-submersible barge submerges and then carries out a water tightness test on the non-self-floating immersed tube. For the non-self-floating immersed tube, the negative buoyancy can be realized without injecting water into a water-loading bag pressed in the immersed tube in the water tightness test stage, and the problem of deflection upwarp of the semi-submerged barge and the immersed tube after submergence can be balanced by proper ballast in the water tightness test stage, so that the immersed tube is prevented from floating upwards due to insufficient negative buoyancy of 1.02 times of the immersed tube caused by the change of the water tightness; the technical personnel select a reasonable scheme according to the specific conditions of the water area. Compared with a water tightness test performed near a prefabricated site after a semi-submerged barge is plugged on a immersed tube, the method and the device have the advantages that the non-self-floating immersed tube and the semi-submerged barge are transported to a submerged pit area of a convoluted water area and then subjected to the water tightness test, the storm condition is improved, the occupied area is small, the navigation of a nearby channel is not influenced, and the repeated submerging times of the semi-submerged barge are reduced.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the non-self-floating immersed tube discharging method provided by the invention submerges the non-self-floating immersed tube along with the semi-submerged barge, so that the mounting barge is sleeved in and connected with the non-self-floating immersed tube, provides a lifting force for the non-self-floating immersed tube by using the mounting barge, and drives the non-self-floating immersed tube to discharge together through twisting the mounting barge, thereby realizing the discharging/discharging barge of the non-self-floating immersed tube which cannot float automatically, and the process is simple and rapid.
2. Compared with the traditional mode of directly twisting out and refuting the self-floating immersed tube, the invention utilizes the installation and refuting twisting out and refuting, and the tube top of the non-self-floating immersed tube does not need to be provided with a mooring winch system, so that the tube top outfitting parts are fewer, and the outfitting operation procedures are fewer.
3. Compared with the traditional mode that secondary outfitting is carried out after the pipe joints are unloaded, the method positions the secondary outfitting operation on the semi-submersible barge before unloading, and changes the sequence of the working procedures of the secondary outfitting operation, so that the non-self-floating immersed pipe does not need to be moored again after being taken out of the barge, and the working procedures are simplified.
4. The invention can utilize space storage outfitting and other auxiliary facilities on the installation barge to integrate the functions of installation, barge movement and outfitting for matching with the non-self-floating immersed tube discharging and barge process, does not need the cooperation of engineering barges, has high efficiency and reduces operation ships in a whirling water area.
5. According to the invention, the transverse barge installation mode is adopted, the measuring towers at the head and the tail of the immersed tube can be installed in advance, and the secondary outfitting is not needed, so that the workload of a convoluted water area is reduced, the underwater operation and floating state calibration are avoided, and the construction operation difficulty is favorably reduced.
6. The invention utilizes the butt joint limiting device to reduce the butt joint difficulty of the lifting point of the lifting appliance under water, and can realize the quick positioning and butt joint of the installation barge lifting appliance and the immersed tube lifting point.
7. The non-self-floating immersed tube hoisting device is connected with the non-self-floating immersed tube by the mounting barge hoisting device, the hoisting winch on the mounting barge is driven to lift the hoisting device upwards, so that the non-self-floating immersed tube is lifted, clamping pre-tightening force is provided for the steel buttress and the clamping groove, friction force can be generated between the mounting barge and the non-self-floating immersed tube when the winch is moved, mounting barge is moved, the non-self-floating immersed tube is driven to be simultaneously pulled out and plugged by the friction force, and the barge pulling operation of the non-self-floating immersed tube is realized.
Drawings
FIG. 1 is a schematic flow chart of a non-self-floating immersed tube refuting method.
Fig. 2 is a schematic diagram of the top outfitting structure layout of the non-self-floating pipe.
Fig. 3 is a schematic plan view of the installation barge in a non-self-floating pipe.
Fig. 4 is a schematic section view of the installation barge into the semi-submerged barge.
Fig. 5 is a schematic view of the butt joint structure of the mounting barge spreader and the immersed tube lifting lug.
Fig. 6 is a schematic structural view of the abutting-joint limiting device on the first lifting lug.
Fig. 7 is a schematic view of a connection structure of the steel buttress and the clamping groove.
Fig. 8 is a schematic structural view of a belt cable before the installation barge longitudinally enters the semi-submersible barge.
Fig. 9 is a schematic structural view of a belt cable before the installation barge transversely enters the semi-submersible barge.
Icon: 1-non-self-floating immersed tube; 1A-a first lifting lug; 2-semi-submerged barge; 3, mounting and refuting; 4-cable group one; 5-cable group two; 6-cable group III; 7-cable group four; 8-cable group five; 9-cable group six; 10-cable group seven; 11-a guide cylinder; 12-a pin shaft; 13-a push member; 14-a scaffold; 15-a second lifting lug; 16-U-shaped piece; 17-steel buttress; 18-a card slot; 19-crane; 20-a goods moving winch; 21-mooring winch; 22-tower bollard; 23-installing a barge pile; 24-positioning a winch; 25-baffle.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
Because the non-self-floating immersed tube 1 can not float, the installation of the barge 3 is needed to be completed on the semi-submersible barge 2, and then the tube section discharge barge can be carried out. The present embodiment provides a non-self-floating immersed tube refuting method, as shown in fig. 1 to 4, including the following steps:
firstly, after a non-self-floating immersed tube 1 is transported to a submerged pit area of a convoluted water area through a semi-submersible barge 2, submerging the semi-submersible barge 2, and submerging the non-self-floating immersed tube 1 into water; and (3) carrying out a water tightness test on the non-self-floating immersed tube 1 after the semi-submersible barge 2 is submerged. Compared with a water tightness test performed near a prefabricated site after the immersed tube barge is semi-submerged barge, the embodiment transports the non-self-floating immersed tube and the semi-submerged barge to a submerged pit area of a convoluted water area and then performs the water tightness test, improves the wind wave condition, occupies a small area, does not influence the navigation of nearby channels, and reduces the repeated submergence times of the semi-submerged barge.
And step two, the mounting barge 3 is stranded to a preset position above the non-self-floating immersed tube 1.
During a water tightness test, the immersed tube is submerged for 0.5 m; when the installation barge 3 with the cable semi-submersible barge 2 is twisted into the semi-submersible barge 2, in order to ensure that a pipe top fitting piece does not collide with the cable boat or the installation barge 3, the semi-submersible barge 2 is required to continue to be pressed down and submerged until the top surface of the immersed pipe is 3m away from the water surface, and the tower on the semi-submersible barge is always exposed out of the water surface in the whole process (the exposed surface of the tower on the semi-submersible barge is the common characteristic of loading goods of all the semi-submersible barges, and the tower on the semi-submersible barge cannot be completely submerged).
And step three, butting the installation barge 3 and the non-self-floating immersed tube 1, and performing secondary outfitting operation.
And fourthly, driving the non-self-floating immersed tube 1 to be discharged together by the twisting and moving installation barge 3. In this step, those skilled in the art should understand that the twisting system and twisting mode for twisting, mounting and refuting the device 3 are different from the twisting system and twisting mode for twisting, mounting and refuting the device 3 in the step two.
The non-self-floating immersed tube discharging method provided by the embodiment is characterized in that a non-self-floating immersed tube 1 is submerged together with a semi-submersible barge 2, so that an installation barge 3 is sleeved in and connected with the non-self-floating immersed tube 1, the installation barge 3 is utilized to provide a lifting force for the non-self-floating immersed tube 1, then the non-self-floating immersed tube 1 is driven to discharge together by twisting and moving the installation barge 3, the discharging/discharging barge of the non-self-floating immersed tube 1 which cannot float automatically is realized, and the process is simple and rapid.
By adopting the method, the safe refuge of the non-self-floating immersed tube can be realized, compared with the traditional method of directly transferring the self-floating immersed tube out of the refuge, the refuge is transferred out by using the mounting refuge 3, the tube top of the non-self-floating immersed tube 1 is not required to be provided with a mooring winch 21 system, the number of tube top outfitting pieces is less, and the outfitting operation procedures are fewer; compared with the traditional mode of performing secondary outfitting on the self-floating immersed tube after the tube joint is unloaded, the method of the embodiment has the advantages that the secondary outfitting operation is performed on the semi-submersible barge 2 before unloading, and the sequence of the secondary outfitting operation procedures is changed, so that the non-self-floating immersed tube 1 does not need to be moored again after being unloaded, and the operation procedures are simplified; in addition, in the embodiment, the space storage outfitting on the installation barge 3 is utilized, the winching and outfitting functions of the installation barge 3 are integrated to be used for being matched with the non-self-floating immersed tube 1 discharging and barge process, the engineering barge is not required to be matched (namely the engineering barge is not required to be dragged with a cable to be moved and installed), the effect is high, and the number of operation ships in a convoluted water area is reduced.
As a specific embodiment, before the first step, the non-self-floating immersed tube 1 is pre-equipped with two measuring towers A, B and calibrated in the factory prefabrication stage, and in the second step, the installation barge 3 enters the semi-submerged barge 2 along the transverse direction of the semi-submerged barge.
Or, optionally, before the step one, a measuring tower A is installed and calibrated before the non-self-floating immersed tube 1 is lifted in a factory prefabricating stage, in the step two, the installation barge 3 longitudinally enters the semi-submersible barge 2, in the step three, secondary outfitting is carried out by using a crane 19 on the installation barge, and the measuring tower B is lifted to the non-self-floating immersed tube 1 for installation.
Compare and refute in the longitudinal direction and only can install one side measuring tower in advance, the opposite side measuring tower relates to the underwater operation and the floating state of non-self-floating immersed tube 1 and marks, and the preferred installation of this embodiment refutes 3 and refutes transversely, can install the both sides measuring tower of immersed tube head and the tail in advance, needn't carry out when the secondary outfitting, has reduced the waters work load of circling round, avoids underwater operation and floating state to mark, does benefit to and reduces the construction operation degree of difficulty.
Further, before the second step, the present embodiment further includes a step of anchoring the installation barge 3 in place: and (3) transporting the installation barge 3 to a convoluted water area by a tugboat towing belt and aligning the installation barge with the semi-submersible barge 2 transversely or longitudinally, and when the distance between the installation barge 3 and the semi-submersible barge is about 250m, connecting the installation barge 3 with a concrete anchor block for mooring and positioning, and leading a section of thin steel wire rope to hang a floating drum in advance for the concrete anchor block.
The semi-submersible barge 2 continues to press water to submerge until the top surface of the immersed tube is 3m away from the water surface; the mounting barge 3 drags the tug to continue to assist in controlling the position of the mounting barge 3.
Then, the steps of installing a barge 3 with a cable semi-submersible barge 2 and twisting the installing barge 3 to a preset position above a non-self-floating immersed tube 1 comprise the following steps:
A. the installation barge 3 longitudinally enters the semi-submerged barge 2: as shown in fig. 8, the arrangement of the installation barge 3 with the cable semi-submersible barge 2 is as follows: one end of the mounting barge 3 far away from the semi-submersible barge 2 is led out of a cable group I4 through two positioning winches 24 positioned on the mounting barge 3 to be cross-moored with a remote coast anchor cable pile; one end of the installation barge 3 close to the semi-submersible barge 2 is also in cross connection with a second cable group 5 led out by another two positioning winches 24 and a tower cable pile 22 on the semi-submersible barge 2, wherein the tower cable pile 22 is positioned on a first tower symmetrically arranged at one end of the semi-submersible barge 2 close to the installation barge 3; and two symmetrical sides on a second tower located at one end of the semi-submersible barge 2 far away from the installation barge 3 are respectively provided with a 200kN goods moving winch 20 and a 300kN mooring winch 21, the two goods moving winches 20 and the two mooring winches 21 are connected to an installation barge pile 23 through cables, wherein the goods moving winches 20 are connected in a crossed mode through a cable group III 6, and the mooring winches 21 are oppositely connected through a cable group IV 7. After the installation barge 3 is controlled by the force of the cable, the tug is withdrawn for towing.
And the semi-submersible barge 2 continues to press water and submerge to a position 3m below the water surface, and the installation barge 3 is gradually and slowly stranded and moved to enter the semi-submersible barge 2 along the longitudinal direction. Based on the arrangement of the belt cables, before the middle position of the installation barge 3 enters the semi-submersible barge 2, the position of the installation barge 3 is controlled mainly by four positioning winches 24 on the installation barge 3 to pull a first cable group 4 and a second cable group 5, and the second cable group 5 serves as a main cable and the other cable groups serve as auxiliary cables to assist in pulling the installation barge 3 to advance along the longitudinal direction of the semi-submersible barge 2; after the middle position of the semi-submersible barge 2 of the installation barge 3 enters, the angle of the cable group II 5 is gradually increased to influence the entering of the installation barge 3, at the moment, the cable group II 5 is untightened and retracted, the cable group III 6 is used as a main cable to control the installation barge 3 to advance along the longitudinal direction of the semi-submersible barge 2, and the rest cables are used as auxiliary cables to be adjusted; when the mounting barge 3 is twisted and moved to be in place, the third 6 cable group of the semi-submersible barge 2 has an overlarge angle and only can control the transverse deviation of the mounting barge 3, and the fourth 7 cable group of the semi-submersible barge 2 is gradually stressed along the longitudinal direction to be used as a main cable and control the mounting barge 3 to move forwards; slowly sleeving the installation barge 3 into the pipe joint, and after the pipe joint reaches a preset position, performing secondary outfitting by using a crane 19 on the installation barge 3.
B. The installation barge 3 transversely enters the semi-submerged barge 2: as shown in fig. 9, a group of five cable groups 8 is arranged on one side of the installation barge 3 far from the semi-submersible barge 2 for cross mooring, two groups of cables are arranged on one side of the installation barge 3 close to the semi-submersible barge 2, the two groups of cables are respectively a cable group six 9 and a cable group seven 10, wherein the cable group six 9 is arranged in a cross manner and connected to a tower bollard 22 on one side of the semi-submersible barge 2 far from the installation barge 3, and the cable group seven 10 is arranged oppositely and connected to a cabled boat on one side of the semi-submersible barge 2 far from the installation barge 3. After the installation barge 3 is controlled by the force of the cable, the tug is withdrawn for towing.
And (3) continuously pressing the semi-submersible barge 2 to be 3m below the submerged surface, gradually and slowly twisting and moving the installation barge 3 to transversely enter the semi-submersible barge 2. Before the middle position of the installation barge 3 enters the semi-submersible barge 2, the longitudinal offset of the installation barge 3 is adjusted by utilizing a cable group five 8 and a cable group six 9, and the cable group six 9 is used as a main cable and the cable group seven 10 is used as an auxiliary cable to pull the installation barge 3 to advance along the transverse direction of the semi-submersible barge 2; when the mounting barge 3 is twisted and moved to be in place, the angle of the cable group six 9 is too large, only the longitudinal deviation of the mounting barge 3 can be controlled, the stress of the cable group seven 10 is gradually increased to serve as a main cable, and the cable group six 9 serves as an auxiliary cable to pull the mounting barge 3 to advance; slowly sleeving the mounting barge 3 into the pipe joint until a preset position is reached. The installation barge 3 has fewer groups of cables which enter the barge transversely, and the control is simpler and quicker.
After the installation barge 3 enters the semi-submersible barge 2, the semi-submersible barge 2 floats to the top surface of the immersed tube with 2m of water, and the distance between the installation barge 3 and the top surface of the immersed tube is 1 m.
As a specific implementation manner, as shown in fig. 4-6, a side surface of the first lifting lug 1A of the non-self-floating immersed tube 1 is provided with an upward-open butt-joint limiting device; a guide cylinder 11 with the same size as the lug hole is arranged on the side face of a second lifting lug 15 for installing the connection lifting appliance, a pin shaft 12 is arranged in the guide cylinder 11 in a sliding mode, the outer end of the pin shaft 12 is connected with a pushing component 13, and the pushing component 13 is used for driving the pin shaft 12 to move along the axial direction of the guide cylinder 11 and pushing the pin shaft 12 into the butt-joint lug hole of the first lifting lug 1A and the second lifting lug 15; the butt joint limiting device is used for providing guiding and butt joint limiting position reference for the second lifting lug 15. In this embodiment, the pushing member 13 is a hydraulic cylinder horizontally disposed and fixed on the second lifting lug 15 through a bracket 14.
When the barge 3 and the non-self-floating immersed tube 1 are installed in a butt joint mode in the third step, the method comprises the following steps of connecting a lifting point hanger underwater:
solving the coordinates of the mounting barge 3 through a mounting barge 3 positioning system; the coordinates of the first lifting lug 1A are solved by calibrating the relative position of the second lifting lug 15 and the semi-submersible barge 2, and the twisting direction and distance of the installation barge 3 are given according to the operation of the system;
firstly, vertically positioning, and twisting and moving the mounting barge 3 to a position where the second lifting lug 15 and the first lifting lug 1A are vertically aligned;
horizontally positioning, namely lowering and installing a hoisting device, wherein the hoisting device enters an open space of a butt joint limiting device, and when the second lifting lug 15 is lowered to abut against the butt joint limiting device, the second lifting lug 15 is horizontally aligned with an ear hole of the first lifting lug 1A, namely, the pin shaft 12 can pass through the ear holes of the first lifting lug 1A and the second lifting lug 15;
a hydraulic drive hydraulic oil cylinder pushes a pin shaft 12, a second lifting lug 15 is in butt joint with a first lifting lug 1A, and after the lifting appliance is in butt joint in place, the distance between a non-self-floating immersed tube 1 and a mounting barge 3 is 1 m; and judging whether the pin shaft 12 is pushed in place or not through the pressure of a hydraulic system, probing by a diver, and bearing the load after confirming that no fault exists, namely installing the barge 3 and providing upward tension for the immersed tube by using the lifting appliance.
The whole underwater docking process is visualized through underwater cctv, and the docking precision is controlled within 0.1m after fine positioning.
Compared with the traditional connection of the hoisting point hanger of the self-floating immersed tube, the connection of the hoisting point hanger of the self-floating immersed tube is above the water surface, the operation is simple and easy, the butt joint difficulty is small, and the connection difficulty of the underwater hoisting point hanger in the embodiment is larger; because factor influences such as wave, rivers, wind current, the installation is refuted 3 and can be produced rocking at non-from superficial immersed tube 1 butt joint in-process, and the butt joint process takes place under water for can take place the dislocation between hole when the installation is refuted the hoist and is connected with immersed tube hoisting point, can't accomplish the butt joint.
In the embodiment, the butt joint limiting device with guiding and lower limiting functions is arranged at the immersed tube lifting lug, so that the lifting appliance and the lifting point can be quickly positioned; this embodiment twists earlier and moves the installation and refute 3 and make vertical location, can make second lug 15 correspond from butt joint stop device's uncovered department and lead-in when transferring the installation and refuting the hoist, and the locate mode is more reasonable, is favorable to reducing boats and ships fluctuation and level and rocks the influence, and the hoist level of below is counterpointed the in-process, and when second lug 15 butt when butt in butt joint stop device, top pushing part 13 can push round pin axle 12 in second lug 15 and first lug 1A's butt joint ear hole, realizes automatic butt joint.
The abutting limiting device is preferably a U-shaped member 16, as shown in fig. 6, the size of the opening of the U-shaped member 16 is gradually reduced from top to bottom, and when the second lifting lug 15 reaches the position capable of abutting with the first lifting lug 1A, the second lifting lug 15 is located inside the U-shaped member 16 and contacts with the U-shaped member 16. Further, butt joint stop device still includes baffle 25, and baffle 25 and guide cylinder 11 are located the relative both sides of first lug 1A respectively, can further all-round reduction second lug 15 the horizontal range of rocking.
After the mounting barge 3 is vertically positioned, a mounting barge hanger is lowered to enable the second lifting lug 15 to enter an opening of the butt joint limiting device for primary limiting; then at horizontal positioning's transfer in-process, utilize the uncovered size that butt joint stop device progressively reduced, reduce the range of rocking of second lug 15 gradually, until when second lug 15 and U type spare 16 match, when the transition cambered surface section contact in second lug 15 and the U type spare 16 promptly, then the second lug can carry out the pin joint with first lug 1A, realized installing and refute hoist and immersed tube hoisting point look for the position fast and dock, the connection of hoisting point does not receive the influence that boats and ships undulate from top to bottom and the level rocks.
It should be understood by those skilled in the art that the present embodiment is illustrated in fig. 5 by using only the connection manner in which the first lifting lug 1A is a single-lug plate, and the second lifting lug 15 is a double-lug plate, and is not limited to the above-mentioned lug plate structure. When the first lifting lug 1A and the second lifting lug 15 are both in a multi-lug plate structure form, the limiting part 1 can also be arranged on the side surface of a certain lug plate or the side surfaces of a plurality of lug plates or the outer side surface of the whole structure of the first lifting lug 1A, and the butt joint with the second lifting lug 15 is not influenced, at the moment, the plurality of lug plates in the second lifting lug 15 are preferably fixed with each other for linkage, so that the rotation influence of underwater interference on different lug plates is avoided; correspondingly, the position of the baffle 25 is understood to be arranged on the outer side surface of the integral structure of the first lifting lug 1A, so that the function of providing lateral limiting for the second lifting lug 15 can be realized, and the situation that the normal butt joint of the second lifting lug 15 and the first lifting lug 1A cannot be realized is avoided; and the position of the guide cylinder 9 on the second lifting lug 15 is understood to be located on the outer side surface of the integral structure, so as to avoid the condition that the normal butt joint between the second lifting lug 15 and the first lifting lug 1A cannot be realized.
The butt joint limiting device can also be in other structural forms such as an inverted splayed shape, can be in a split type and can also be in an integrated type, and when the first lifting lug 1A is in butt joint with the second lifting lug 15, the butt joint limiting device is used for being in contact limiting with the bottom of the second lifting lug 15.
As a specific implementation mode, as shown in fig. 4 and 7, the lower part of the mounting barge 3 is provided with an inverted trapezoidal steel buttress 17, and the upper part of the non-self-floating immersed tube 1 is provided with a clamping groove 18 matched with the steel buttress 17;
after the second lifting lug 15 is in butt joint with the first lifting lug 1A, the non-self-floating immersed tube 1 is lifted by the mounting barge lifting tool until the steel buttress 17 is clamped with the clamping groove 18, and then the step four is carried out, the non-self-floating immersed tube 1 is driven to be discharged together by the friction force between the mounting barge 3 and the non-self-floating immersed tube 1, and the distance between the non-self-floating immersed tube 1 and the mounting barge 3 is 0.5 m. In the process of discharging and refuting, in order to ensure the stability and safety of the discharging and refuting of the immersed tube, a plurality of groups of mooring ropes are arranged on the installation refuting device 3 and connected to the mooring bollards of the tube sections of the non-self-floating immersed tube 1. The technical personnel in the field need to understand that the installation barge is provided with a hoisting winch, and the hoisting winch winches the lifting appliance to move up and down so as to provide driving force for lifting the non-self-floating immersed tube by the lifting appliance; in the embodiment, the non-self-floating immersed tube 1 is connected by the installation barge, the hoisting winch for driving the connection hoist is used for providing clamping pre-tightening force for the steel buttress 17 and the clamping groove 18, when the winch is moved for 3 discharging barge, the winch can generate friction force between the installation barge 3 and the non-self-floating immersed tube 1, and the friction force is used for driving the non-self-floating immersed tube 1 to discharge together for barge, so that the discharging barge operation of the non-self-floating immersed tube 1 is realized.
It should be noted that, the term "main cable" herein refers to a main traction function in a certain direction, and the traction process is always stressed, and the term "auxiliary cable" refers to a cable which can be stressed in the direction and can not be stressed, and can be adjusted according to actual conditions; the term "non-self-floating immersed tube 1" as used herein means actually a single tube section of the non-self-floating immersed tube 1 during transportation and refuge; in addition, secondary fitting-out operation means that the fitting-out piece on the pipe roof is installed and debugged on site, for example traditional installation measuring tower, hoisting point are connected etc. when non-floating immersed tube adopts the longitudinal to refute in this embodiment, need carry out the measuring tower installation when the secondary fitting-out, and when adopting transversely refute, because two measuring towers of immersed tube head and the tail have been installed in the prefabrication place and demarcated the completion, need not carry out when the secondary fitting-out.
It should be noted that each cable group in this embodiment includes two cables, the two cables are symmetrically arranged along a central axis of the advancing direction of the installation barge, and a starting end of each cable is pulled by a winch, where the single cable may refer to an integral body formed by winding and twisting a plurality of thin ropes, or to a single thin rope, and the cable strength is selected according to actual conditions; the actual cable set is not limited to the above meaning, i.e. the cable set may also comprise more than two cables drawn in parallel, either in a crossing arrangement or in an opposing arrangement as a whole.
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 non-self-floating immersed tube refuting method is characterized by comprising the following steps of:
firstly, after a non-self-floating immersed tube (1) is transported to a convoluted water area through a semi-submersible barge (2), the semi-submersible barge (2) is submerged until the non-self-floating immersed tube (1) is submerged in water;
secondly, moving the mounting barge (3) to a preset position above the non-self-floating immersed tube (1) in a twisting manner;
step three, butting the installation barge (3) and the non-self-floating immersed tube (1) and performing secondary outfitting operation;
and fourthly, moving the mounting barge (3) in a twisting manner to drive the non-self-floating immersed tube (1) to be discharged together.
2. The non-self-floating immersed tube barge discharging method according to claim 1, wherein in the second step, the installation barge (3) is longitudinally stranded along the semi-submersible barge (2), and the method comprises the following steps:
a21, connecting various cable groups, wherein each cable group comprises a first cable group (4), a second cable group (5), a third cable group (6) and a fourth cable group (7), the first cable groups (4) are arranged in a crossed manner, one end of each first cable group (4) is connected with one end of the installation barge (3) far away from the semi-submersible barge (2), and the other end of each first cable group is connected with a coastal anchor point; the second cable group (5) is arranged in a crossed manner, one end of the second cable group (5) is connected with one end, close to the semi-submersible barge (2), of the installation barge (3), and the other end of the second cable group is connected with a first tower floor, close to one end of the installation barge (3), of the semi-submersible barge (2); the third cable group (6) is arranged in a crossed manner, one end of the third cable group (6) is connected with a second tower on the semi-submersible barge (2) far away from one end of the installation barge (3), and the other end of the third cable group (6) is connected with the installation barge (3); the cable group IV (7) is oppositely arranged, one end of the cable group IV (7) is connected with the second tower, and the other end of the cable group IV (7) is connected with the mounting barge (3);
a22, driving the installation barge (3) to approach the semi-submersible barge (2) by taking the second cable group (5) as a main cable until the installation barge (3) is positioned between two first towers, and releasing the cable to retract the second cable group (5);
a23, taking the cable group III (6) as a main cable to drive the installation barge (3) to further advance, and gradually increasing the traction force of the cable group IV (7) and simultaneously reducing the traction force of the cable group III (6) along with the advance of the installation barge (3) until the installation barge (3) is positioned at a preset position above the non-self-floating sinking pipe (1).
3. The non self-floating immersed tube refuting method according to claim 1, characterized in that before the first step, the non self-floating immersed tube (1) is equipped with two measuring towers A, B at the stage of factory prefabrication and calibration is completed, and in the second step, the installation refuge (3) enters the semi-submersible refuge (2) transversely along the semi-submersible refuge (2).
4. A non-self-floating immersed tube barge-out method according to claim 3, wherein in the second step, the transversely-twisting of the installation barge (3) along the semi-submersible barge (2) comprises the following steps:
b21, connecting various cable groups, wherein the cable groups comprise a cable group five (8), a cable group six (9) and a cable group seven (10), the cable group five (8) is arranged in a crossed manner, one end of the cable group five (8) is connected with one end of the installation barge (3) far away from the semi-submersible barge (2), and the other end of the cable group five (8) is connected with a coastal anchor point; the six cable groups (9) are arranged in a crossed manner, one end of each cable group (9) is connected with one side, close to the semi-submersible barge (2), of the installation barge (3), and the other end of each cable group is connected with one side, far away from the installation barge (3), of the semi-submersible barge (2) in a crossed manner; the seventh cable group (10) is arranged oppositely, one end of the seventh cable group (10) is connected with the installation barge (3), the other end of the seventh cable group is connected with a cabled boat, and the cabled boat is in place at the side of the semi-submersible barge (2) far away from the installation barge (3);
b22, in the process of transverse alignment of the installation barge (3) and the semi-submersible barge, driving the installation barge (3) to approach the non-self-floating immersed tube (1) by taking the cable group six (9) as a main cable;
b23, the seven (10) cable groups are used as main cables to drive the installation barge (3) to further advance, and along with the advance of the installation barge (3), the traction force of the seven (10) cable groups is gradually increased while the traction force of the six (9) cable groups is reduced until the installation barge (3) is located at a preset position above the non-self-floating sinking pipe (1).
5. The non-self-floating immersed tube barge discharging method according to any one of claims 1 to 4, wherein before the second step, the method further comprises the step of anchoring the installation barge (3) in place, and the steps are as follows: the installation barge (3) is transported to a convoluted water area by a tugboat and is horizontally or longitudinally aligned with the semi-submerged barge (2), and the installation barge (3) is connected with a concrete anchor block for mooring and positioning.
6. The non self-floating immersed tube refuting method according to any one of claims 1 to 4, wherein in the first step, the semi-submersible refuting (2) submerges and then carries out water tightness test on the non self-floating immersed tube (1).
7. The non-self-floating immersed tube refuting method according to any one of claims 1-4, wherein a butting limiting device with an upward opening is arranged on the side surface of the first lifting lug (1A) of the non-self-floating immersed tube (1); a lifting appliance is arranged on the mounting barge (3), a guide cylinder (11) is arranged on the side surface of a second lifting lug (15) of the lifting appliance, a pin shaft (12) is arranged in the guide cylinder (11) in a sliding manner, the outer end of the pin shaft (12) is connected with a pushing component (13), and the pushing component (13) is used for driving the pin shaft (12) to move along the axial direction of the guide cylinder (11) and pushing the pin shaft (12) into a butt joint lug hole of the first lifting lug (1A) and the second lifting lug (15); the butt joint limiting device is used for providing guiding and butt joint limiting position reference for the second lifting lug (15);
when the installation barge (3) and the non-self-floating immersed tube (1) are butted in the step three, the method comprises the following steps of connecting a lifting point hanger underwater:
firstly, vertically positioning, and twisting and moving the mounting barge (3) to a position where the second lifting lug (15) and the first lifting lug (1A) are vertically aligned;
horizontally positioning, and lowering the lifting appliance, wherein the lifting appliance enters an open space of the butt joint limiting device, and when the second lifting lug (15) is lowered to abut against the butt joint limiting device, the second lifting lug (15) is horizontally aligned with an ear hole of the first lifting lug (1A);
and driving the pushing component (13) to push the pin shaft (12), and butting the second lifting lug (15) with the first lifting lug (1A).
8. The non-self-floating immersed tube refuting method as claimed in claim 7, wherein in the third step, the pushing component (13) is a hydraulic oil cylinder, whether the pin shaft (12) is pushed in place is judged by the pressure of a hydraulic system, and then the judgment is confirmed by probing of a diver.
9. The non-self-floating immersed tube refuting method according to claim 7, wherein the butt-joint limiting device is a U-shaped piece (16), and the size of an opening of the U-shaped piece (16) is gradually reduced from top to bottom; when the second lifting lug (15) reaches the position capable of being butted with the first lifting lug (1A), the second lifting lug (15) is positioned inside the U-shaped member (16) and is in contact with the U-shaped member (16).
10. The non self-floating immersed tube discharging method according to claim 7, wherein the lower part of the installation barge (3) is provided with a steel buttress (17), and the upper part of the non self-floating immersed tube (1) is provided with a clamping groove (18) matched with the steel buttress (17);
after the second lifting lug (15) is in butt joint with the first lifting lug (1A), the lifting appliance is used for lifting the non-self-floating immersed tube (1) to the steel buttress (17) to be clamped with the clamping groove (18), then the step four is carried out, and when the mounting barge (3) is moved in a twisting mode, the friction force between the mounting barge (3) and the non-self-floating immersed tube (1) is used for driving the non-self-floating immersed tube (1) to be discharged and barge together.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114622597A (en) * | 2022-03-02 | 2022-06-14 | 上海市隧道工程轨道交通设计研究院 | Connecting structure of fittings of steel shell concrete immersed tube tunnel and construction method of connecting structure |
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