CN112695786A - Open caisson long-distance floating transportation method - Google Patents
Open caisson long-distance floating transportation method Download PDFInfo
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- CN112695786A CN112695786A CN202011507515.2A CN202011507515A CN112695786A CN 112695786 A CN112695786 A CN 112695786A CN 202011507515 A CN202011507515 A CN 202011507515A CN 112695786 A CN112695786 A CN 112695786A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/56—Towing or pushing equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/28—Barges or lighters
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/18—Foundations formed by making use of caissons
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Abstract
The application discloses a long-distance floating transportation method for an open caisson, which relates to the technical field of bridge open caisson construction and comprises the following steps: arranging a lower port of a closed part of a well hole of a capsule supporting plate on the lower end face of the open caisson, forming a closed area by adjacent closed well holes, and arranging a water stopping structure between the capsule supporting plate and the bottom edge of the closed area; installing a plurality of vertically arranged anti-jacking mechanisms in at least part of the closed well holes, wherein the lower ends of the anti-jacking mechanisms are abutted to the capsule sealing supporting plate; after the open caisson is launched and transported to a designated position by a cabin sealing supporting plate in a floating mode, injecting water into the closed well hole; and reversely jacking the capsule supporting plate to the lower end surface of the separated sinking well by using a reverse jacking mechanism, and dragging the capsule supporting plate out of the bottom of the sinking well by a barge. According to the floating transportation method, the floating transportation floating assisting process is changed from air tightness to water tightness, the safety and the stability in the long-distance floating transportation process of the open caisson can be guaranteed, the cabin sealing supporting plate can be accelerated to be separated from the open caisson through the reverse jacking mechanism, the cabin sealing supporting plate can be quickly recovered by being matched with a barge, the whole floating transportation process is safe and reliable, and the efficiency is high.
Description
Technical Field
The application relates to the technical field of bridge open caisson construction, in particular to an open caisson long-distance floating transportation method.
Background
At present, in the field of bridge construction, open caisson is increasingly used as a bridge foundation. After the open caisson is processed and manufactured in the dock, the open caisson needs to float automatically after entering water in the dock, then is transported to a pier position in a floating mode through a tugboat, and then sinks to carry out bridge foundation construction.
In the related technology, the floating transportation of the huge overweight open caisson adopts a cabin sealing pressurization mode, the well hole of the open caisson is sealed by utilizing a floating-assisted cabin sealing structure, and the open caisson floating transportation is realized through an air bag.
On one hand, however, the air bag needs to maintain pressure continuously during the floating transportation process, and the open caisson manufacturing site needs to be close to the bridge pier, so that the method has great limitation in use and is not suitable for long-distance open caisson transportation; on the other hand, the structure of the floating-assisted sealed cabin has high air tightness requirement, and enough equipment needs to be equipped to ensure that the well hole is sealed and air-tight, so that the reliability of the floating transportation process is low; in addition, the period for dismantling the cabin sealing structure is long, and the construction period is influenced.
Disclosure of Invention
Aiming at one of the defects in the prior art, the application aims to provide a long-distance floating transportation method for an open caisson, so as to solve the problems that the related technology is not suitable for long-distance transportation of the open caisson, the period for dismantling a cabin sealing structure is long, and the construction period is influenced.
In order to achieve the above purposes, the technical scheme is as follows: a long-distance floating method for an open caisson, which is used for floating the open caisson to a specified position, wherein the open caisson comprises a well wall with an annular cross section and a plurality of partition walls arranged in the well wall, and the partition walls divide a space enclosed by the well wall into a plurality of well holes, and is characterized by comprising the following steps:
arranging a lower port of a closed part of a well hole of a capsule supporting plate on the lower end face of the open caisson, forming a closed area by adjacent closed well holes, and arranging a water stopping structure between the capsule supporting plate and the bottom edge of the closed area;
installing a plurality of vertically arranged anti-jacking mechanisms in at least part of the closed well holes, wherein the lower ends of the anti-jacking mechanisms are abutted against the capsule-sealing supporting plate;
after the open caisson is launched and transported to a designated position by a cabin sealing supporting plate in a floating mode, injecting water into the closed well hole;
and reversely jacking the capsule supporting plate to be separated from the lower end face of the sinking well by using the reverse jacking mechanism, and dragging the capsule supporting plate out of the bottom of the sinking well by a barge.
In some embodiments, the anti-jacking mechanism comprises a jack and a jack rod; above-mentioned anti-top mechanism of a plurality of vertical settings of installation specifically includes:
placing a mandril in at least part of the closed well hole, and installing a limiting component on the inner wall of the well hole, wherein the limiting component is provided with a through hole in clearance fit with the mandril;
and a force application platform is arranged on the inner wall of the well hole above the ejector rod, a jack is arranged on the force application platform, and the jack is connected with the top of the ejector rod.
In some embodiments, prior to placing the mandrel in the at least partially closed well, further comprising:
the lower end of the ejector rod is connected with a roller;
when the ejector rod is positioned in the well hole, the roller is in rolling contact with the capsule supporting plate.
In some embodiments, before the lower end face of the open caisson is provided with the capsule-sealing supporting plate, the method further comprises:
determining the number of the well bores to be sealed and the sealing area according to the buoyancy required by the open caisson; the closed area is formed by encircling a part of well wall and a part of partition wall from head to tail, two closed areas are arranged and are symmetrically arranged relative to the center of the open caisson;
and manufacturing a cabin sealing supporting plate according to the number and the shape of the sealed areas.
In some embodiments, a first leg at the bottom of said well wall is lower than a second leg at the bottom of said partition, said first leg having an inclined surface inclined away from the axis of said well on the side facing said well;
the cabin-sealing supporting plate is connected to the lower end face of the second cutting edge foot and is provided with a step face attached to the first cutting edge foot.
In some embodiments, the manufacturing of the capsule supporting plate specifically includes:
manufacturing a lower platform plate according to the shape of the closed area;
fixing first section steel at each partition wall in the corresponding closed area on the lower platform plate, and fixing second section steel between the adjacent first section steel arranged at intervals along the length direction of the lower platform plate, wherein the second section steel is vertical to the length direction of the lower platform plate;
fixing an upper platform plate on the upper surfaces of the first section steel and the second section steel, so that the upper platform plate is positioned on the lower end surface of the second blade foot corresponding to the closed area and is abutted against the inclined surface corresponding to the first blade foot;
and a continuous edge sealing steel plate is arranged along the peripheries of the upper platform plate and the lower platform plate to form the cabin sealing supporting plate.
In some embodiments, after the fixing the second type steel, the method further comprises:
manufacturing the ends of the first section steel and the second section steel, one ends of which are positioned at the well wall corresponding to the closed area, into a step line shape matched with the first blade foot;
the part of the edge sealing steel plate on one side of the well wall comprises a first plate body, a second plate body and a third plate body, wherein the first plate body is attached to the inclined surface, the second plate body is horizontally arranged, the third plate body is vertically arranged, and two ends of the second plate body are welded and sealed with the first plate body and the third plate body respectively.
In some embodiments, after the manufacturing of the capsule supporting plate, the method further includes: and a lifting ring is arranged on one side of the cabin sealing supporting plate and is connected with the barge through a pull rope.
In some embodiments, a water stopping structure is disposed between the capsule supporting plate and the bottom edge of the closed region, and specifically includes:
and sealing gaskets are clamped between the cabin sealing supporting plate and the bottom edge of the sealing area, and water-stopping sealing glue is poured between the sealing gaskets and the cabin sealing supporting plate and between the sealing gaskets and the bottom edge of the sealing area.
In some embodiments, the water stopping structure further includes:
a water stop steel plate is annularly arranged at the joint of the inner wall of each closed well hole and the capsule sealing supporting plate, one end of the water stop steel plate is fixedly welded with the inner wall of the well hole, and the other end of the water stop steel plate is fixedly welded with the capsule sealing supporting plate;
pouring water-stopping sealant at the welding seam of the water-stopping steel plate;
before injecting water into the closed well hole, the method further comprises the following steps: and (5) dismantling the water stop steel plate.
The beneficial effect that technical scheme that this application provided brought includes:
the long-distance floating transportation method of the open caisson is characterized in that the lower end face of the open caisson is provided with the lower port of a closed part well hole of a cabin sealing supporting plate, a water stopping structure is arranged between the cabin sealing supporting plate and the closed part, then a plurality of vertically arranged reverse jacking mechanisms are arranged in at least part of the closed well hole, water is injected into the closed well hole after the open caisson is floated to a specified position, the cabin sealing supporting plate is reversely jacked to be separated from the lower end face of the open caisson by the reverse jacking mechanism, and the cabin sealing supporting plate can be dragged out of the bottom of the open caisson by a barge, so that the buoyancy of the open caisson is increased by the cabin sealing supporting plate and the water stopping structure, the floating depth of the open caisson is reduced, the floating assisting process of the floating transportation is changed from air tightness and water tightness, the safety and the stability in the long-distance floating transportation process of the open caisson can be ensured, the separation of the cabin sealing supporting plate from the open caisson can be accelerated by the reverse jacking, the whole floating transportation process is safe and reliable, and the efficiency is high.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flow chart of an open caisson long-distance floating transportation method according to an embodiment of the application;
fig. 2 is a vertical arrangement view of the floating transportation process of the open caisson according to the embodiment of the present application;
FIG. 3 is a diagram illustrating step S4 according to an embodiment of the present application;
FIG. 4 is a schematic view illustrating the connection between the well wall and the capsule supporting plate according to the embodiment of the present application;
FIG. 5 is a schematic view of the connection between the partition wall and the sealing support plate according to the embodiment of the present application;
fig. 6 is a plan view illustrating the floating process of the open caisson in accordance with the embodiment of the present invention.
Reference numerals:
1. sinking a well; 11. a well wall; 111. a first blade leg; 12. a partition wall; 121. a second blade leg;
2. a cabin sealing supporting plate; 21. a lower deck plate; 22. an upper deck plate; 23. a first section steel; 24. a second section steel; 25. a first plate body; 26. a second plate body; 27. a third plate body;
3. a reverse jacking mechanism; 31. a jack; 32. a top rod; 33. a limiting component; 34. a roller;
4. a barge; 41. pulling a rope;
5. a gasket;
6. a water stop steel plate;
7. and constructing a water line.
Detailed Description
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. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment of the application provides a long-distance floating transportation method for an open caisson, which can solve the problems that the related technology is not suitable for long-distance transportation of the open caisson, the period for dismantling a cabin sealing structure is long, and the construction period is influenced.
The open caisson long-distance floating transportation method is used for floating and transporting the open caisson 1 to a specified position, namely a bridge pier position. The open caisson 1 includes a well wall 11 having an annular cross section, and a plurality of partition walls 12 provided in the well wall 11, and the partition walls 12 partition a space surrounded by the well wall 11 into a plurality of well bores, so that the plurality of well bores are in a grid shape.
As shown in fig. 1 and 2, in the present embodiment, the floating method includes the steps of:
s1, arranging a lower port of a closed part of a well hole of a cabin sealing supporting plate 2 on the lower end face of the open caisson 1, forming a closed area by adjacent closed well holes, and arranging a water stopping structure between the cabin sealing supporting plate 2 and the bottom edge of the closed area.
S2, a plurality of vertically arranged reverse jacking mechanisms 3 are arranged in at least part of the closed well holes, and the lower ends of the reverse jacking mechanisms 3 are abutted to the capsule sealing supporting plate 2.
And S3, after the open caisson 1 is drained and transported to a designated position by the cabin sealing supporting plate 2 in a floating mode, injecting water into the closed well hole.
After the open caisson 1 is submerged, the cabin sealing supporting plate 2 is positioned below a horizontal plane, namely a construction water level line 7.
S4, reversely jacking the cabin sealing supporting plate 2 to be separated from the lower end face of the open caisson 1 by using the reverse jacking mechanism 3, and dragging the cabin sealing supporting plate out of the bottom of the open caisson 1 by using a barge 4.
As shown in fig. 3, a winch may be optionally provided on the barge 4, and the winch is connected to the suspension ring through a pull rope 41 to facilitate rapid recovery of the deck-sealing trays 2.
According to the floating transportation method, the buoyancy of the open caisson is increased through the capsule supporting plate 2 and the water stop structure, the draft of floating transportation of the open caisson 1 is reduced, the floating transportation floating assisting process is changed from air tightness to water tightness, the safety and stability of the open caisson in the long-distance floating transportation process can be guaranteed, the capsule supporting plate can be accelerated to be separated from the open caisson through the reverse jacking mechanism, the capsule supporting plate can be quickly recovered through the cooperation of a barge, the whole floating transportation process is safe and reliable, and the efficiency is high.
In this embodiment, the reverse jack mechanism 3 includes a jack 31 and a jack rod 32; above-mentioned anti-mechanism 3 that pushes up of a plurality of vertical settings of installation specifically includes:
first, ram 32 is placed in the at least partially closed well bore and moved to a design position adjacent the inner wall of the well bore. The location of this concern is as close to the borehole wall as possible so that the capsule pallet 2 can be released from the caisson 1 more quickly by the counter-lift force of the lift pins 32 after the caisson 1 is floated to the specified location.
Then, a limiting component 33 is installed on the inner wall of the well hole, and the limiting component 33 is provided with a through hole in clearance fit with the ejector rod 32 so as to limit the ejector rod 32 vertically through the inner wall of the well hole.
Finally, a force application platform is arranged on the inner wall of the well hole above the mandril 32, a jack 31 is arranged on the force application platform, and the jack 31 is connected with the top of the mandril 32. The jack 31 can make the mandril 32 move downwards and push the capsule supporting plate 2 away from the open caisson 1.
Preferably, before the mandrel 32 is placed in the at least partially closed well, the method further comprises: a roller 34 is connected to the lower end of the ram 32. When the ram 32 is located in the well, the roller 34 is in rolling contact with the capsule pallet 2.
In this embodiment, the rollers 34 are disposed on the bottom wall of the lift rod 32, and the rollers 34 are in rolling contact with the capsule supporting plate 2, so as to reduce the friction resistance of the relative movement between the two. On one hand, when the ejector rod 32 is lowered into the well hole, the ejector rod 32 can be conveniently and rapidly moved on the capsule supporting plate 2; on the other hand, after the anti-jacking mechanism 3 jacks the cabin sealing supporting plate 2 back to be separated from the lower end face of the open caisson 1, the pulling force generated when the cabin sealing supporting plate 2 is dragged by the sealing barge 4 can be reduced, so that the cabin sealing supporting plate 2 can be recovered as soon as possible.
In this embodiment, in step S1, before the capsule supporting plate 2 is disposed on the lower end surface of the open caisson 1, the method further includes:
firstly, determining the number of the well bores to be sealed and a sealed area formed by sealing the adjacent well bores to be sealed according to the buoyancy required by the open caisson 1; the closed area is formed by enclosing a part of well wall 11 and a part of partition wall 12 end to end, namely the closed loop formed by enclosing the part of well wall 11 and the part of partition wall 12 is the edge of the closed area.
Wherein, above-mentioned closed region is equipped with two, and relative above-mentioned open caisson 1 centrosymmetric setting, can guarantee the equilibrium of open caisson 1, avoids the possibility of turning on one's side.
Then, the capsule supporting plate 2 is manufactured according to the number and the shape of the closed areas. I.e. one capsule pallet 2 per closure zone.
In other embodiments, the enclosed area may be the area enclosed by the whole well wall 11, i.e. all the wells are enclosed by the capsule pallet 2 to ensure that the open caisson 1 has sufficient buoyancy.
As shown in fig. 4 and 5, a first blade 111 is provided on the bottom of the borehole wall 11, a second blade 121 is provided on the bottom of the partition wall 12, the lower end surface of the first blade 111 is lower than the lower end surface of the second blade 121, and an inclined surface inclined in a direction away from the borehole axis is provided on the side of the first blade 111 facing the borehole.
In this embodiment, the capsule shell 2 is connected to the lower end surface of the second blade leg 121 and has a step surface that is in contact with the first blade leg 111, that is, a plane that is in contact with the lower end surface of the first blade leg 111 and an inclined surface that is in contact with the inclined surface of the first blade leg 111 are provided on the side of the capsule shell 2 located on the first blade leg 111, and the plane and the inclined surface form the step surface of the capsule shell 2.
As shown in fig. 6, further, the manufacturing of the capsule supporting plate 2 specifically includes:
first, the lower platen 21 is manufactured according to the shape of the sealing region, that is, the shape of the lower platen 21 is the same as the shape of the sealing region.
Secondly, a first section steel 23 is fixed on the lower platform plate 21 corresponding to each partition wall 12 in the closed area, and a second section steel 24 is fixed between the adjacent first section steels 23 arranged at intervals along the length direction of the lower platform plate 21, wherein the second section steel 24 is vertical to the length direction of the lower platform plate 21. Wherein, first shaped steel 23 and second shaped steel 24 all with lower landing plate 21 welded fastening.
Then, an upper deck plate 22 is fixed to the upper surfaces of the first and second section steels 23 and 24. The intersection line of the plane of the lower end face of the second cutting edge 121 and the inclined plane of the first cutting edge 111 in the closed region is taken as a dividing line, the cross section of the closed region at the lower end face of the second cutting edge 121 is divided into two parts by the dividing line, and the upper platform plate 22 can be manufactured according to the shape of the part with larger area, so that the upper platform plate 22 is positioned at the lower end face of the second cutting edge 121 corresponding to the closed region and is abutted against the inclined plane corresponding to the first cutting edge 111.
Specifically, after the capsule supporting plate 2 is fixed at the bottom of the caisson 1, the upper platform plate 22 is connected to the lower end surface of the second blade leg 121 of the sealing area and abuts against the inclined surface of the first blade leg 111 of the sealing area.
Finally, a continuous edge sealing steel plate is arranged along the peripheries of the upper platform plate 22 and the lower platform plate 21 to form the cabin sealing supporting plate 2.
The edge of the upper end of the edge sealing steel plate is welded, sealed and fixed with the upper platform plate 22, and the edge of the lower end of the edge sealing steel plate is welded, sealed and fixed with the lower platform plate 21.
In this embodiment, after the second section steel 24 is fixed, the method further includes:
and (3) taking the first section steel 23 and the second section steel 24 with one ends positioned at the well wall 11 corresponding to the closed area as section steel to be processed, and processing the end part of the section steel to be processed positioned at the well wall 11 to manufacture a step line shape matched with the first blade leg 111.
The edge banding steel plate on one side of the well wall 11 comprises a first plate body 25, a second plate body 26 and a third plate body 27. This first plate body 25 slope sets up, and sets up with the laminating of above-mentioned inclined plane, and second plate body 26 level sets up, the vertical setting of third plate body 27, and one side and the last landing slab 22 welded seal of second plate body 26 are kept away from to above-mentioned first plate body 25, and second plate body 26 both ends respectively with first plate body 25 and third plate body 27 welded seal, and one side and the lower landing slab 21 welded seal of second plate body 26 are kept away from to third plate body 27.
In this embodiment, the first section steel 23 and the second section steel 24 are both I-shaped steel. The first blade leg 111 of the closed well wall 11 is pressed on the upper end surface of the second plate body 26 and is abutted against the first plate body 25, and the second blade leg 121 of the closed partition wall 12 is pressed on the upper end surface of the upper platform plate 22.
Further, after the above-mentioned capsule supporting plate 2 is manufactured, the method further includes: a suspension ring is provided on one side of the deck plate 2, and the suspension ring is connected to the barge 4 by a stay 41. Therefore, the slings and the pull rope 41 are installed before the open caisson 1 is floated.
In this embodiment, in step S1, the step of providing a water stopping structure between the capsule supporting plate 2 and the bottom edge of the sealed area specifically includes:
firstly, a sealing gasket 5 is clamped between the capsule-sealing supporting plate 2 and the bottom edge of the closed area, namely, the sealing gasket 5 is clamped between the capsule-sealing supporting plate 2 and a well wall 11 and a partition wall 12 at the bottom edge of the closed area, and the sealing gasket 5 is ensured to be arranged around the space between the capsule-sealing supporting plate 2 and the bottom edge of the closed area.
Then, water-stopping and sealing glue is poured between the sealing gasket 5 and the capsule supporting plate 2 and between the sealing gasket 5 and the bottom edge of the sealing area, so that the sealing performance of the joint is further improved.
Preferably, in step S1, after the water stopping structure is provided, the method further includes:
firstly, a water-stopping steel plate 6 is annularly arranged at the joint of the inner wall of each closed well hole and the capsule-sealing supporting plate 2, one end of the water-stopping steel plate 6 is fixedly welded with the inner wall of the well hole, and the other end of the water-stopping steel plate 6 is fixedly welded with the capsule-sealing supporting plate 2. Wherein, the sealing gasket 5 can be selected as a rubber gasket.
Then, a water-stopping sealant is poured into the weld of the water-stopping steel plate 6.
At this moment, be equipped with the water proof space between stagnant water steel sheet 6 and partition wall 12 and the capsule layer board 2, when having water to infiltrate through 5 departments of gasket, still need pass through the water proof space and pass stagnant water steel sheet 6, just can get into in the well hole, consequently, can further strengthen the sealed effect between capsule layer board 2 and the wall of a well 11 through setting up stagnant water steel sheet 6.
In this embodiment, after the open caisson 1 has been transported to the designated pier position by floating, before injecting water into the closed well bore, the method further includes: and (5) removing the water stop steel plate 6.
After the open caisson 1 is transported in place by floating, constructors can firstly cut the water stop steel plate 6 under the dry environment condition after entering the well hole so as to reduce the connection strength of the cabin sealing supporting plate 2 and the open caisson 1, then water can be injected into the well hole, and the separation of the cabin sealing supporting plate 2 is accelerated through the reverse jacking mechanism 3.
The long-distance floating transportation method of the open caisson is suitable for long-distance floating transportation of the huge overweight open caisson, the cabin sealing supporting plate is of a floating body structure, a well hole is sealed through the cabin sealing supporting plate to achieve water tightness sealing, the water tightness is further ensured through the sealing gasket, the water-stopping sealing glue and the water-stopping steel plate, after the open caisson is in place in floating transportation, the cabin sealing supporting plate can be easily pulled out of the bottom of the open caisson through the reverse jacking mechanism matched with a barge, and the cabin sealing supporting plate can be quickly recovered after being suspended on the water surface, so that the safety and reliability of the whole floating transportation process and the convenience of recovering the cabin sealing supporting plate are realized.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention.
Claims (10)
1. A long-distance floating method for a sunk well, which is used for floating the sunk well (1) to a specified position, wherein the sunk well (1) comprises a well wall (11) with an annular cross section and a plurality of partition walls (12) arranged in the well wall (11), and the space enclosed by the well wall (11) is divided into a plurality of well holes by the partition walls (12), and is characterized by comprising the following steps:
arranging a lower port of a closed part of a well hole of a capsule-sealing supporting plate (2) on the lower end face of the open caisson (1), forming a closed area by adjacent closed well holes, and arranging a water-stopping structure between the capsule-sealing supporting plate (2) and the bottom edge of the closed area;
a plurality of vertically arranged anti-jacking mechanisms (3) are arranged in at least part of the closed well hole, and the lower ends of the anti-jacking mechanisms (3) are abutted against the capsule-sealing supporting plate (2);
launching the open caisson (1) and carrying the open caisson to a designated position by a cabin sealing supporting plate (2) in a floating mode, and injecting water into the closed well hole;
and reversely jacking the cabin-sealing supporting plate (2) to be separated from the lower end face of the open caisson (1) by using the reverse jacking mechanism (3), and dragging the cabin-sealing supporting plate out of the bottom of the open caisson (1) by using a barge (4).
2. The open caisson long distance floating transportation method according to claim 1, wherein the jack-up mechanism (3) comprises a jack (31) and a jack rod (32); the anti-mechanism (3) of pushing up of a plurality of vertical settings of installation specifically includes:
a mandril (32) is placed in the at least partially closed well hole, a limiting component (33) is arranged on the inner wall of the well hole, and the limiting component (33) is provided with a through hole which is in clearance fit with the mandril (32);
and arranging a force application platform on the inner wall of the well hole above the ejector rod (32), installing a jack (31) on the force application platform, and connecting the jack (31) with the top of the ejector rod (32).
3. The method of claim 2, wherein prior to placing the carrier rod (32) in the at least partially closed well bore, further comprising:
the lower end of the ejector rod (32) is connected with a roller (34);
when the ejector rod (32) is positioned in the well hole, the roller (34) is in rolling contact with the capsule supporting plate (2).
4. The caisson long distance floating transportation method according to claim 1, wherein before the setting of the capsule pallet (2) on the lower end face of the caisson (1), further comprising:
determining the number of the well bores to be sealed and the sealing area according to the buoyancy required by the open caisson (1); the open caisson is characterized in that the closed area is formed by encircling a part of the well wall (11) and a part of partition walls (12) end to end, and two closed areas are arranged and are arranged symmetrically relative to the center of the open caisson (1);
and manufacturing a cabin sealing supporting plate (2) according to the number and the shape of the closed areas.
5. The open caisson long-distance floating transportation method according to claim 4, wherein: a first edge leg (111) at the bottom of the well wall (11) is lower than a second edge leg (121) at the bottom of the partition wall (12), and an inclined surface inclined in the direction away from the axis of the well hole is arranged on one side, facing the well hole, of the first edge leg (111);
the capsule-sealing supporting plate (2) is connected to the lower end face of the second cutting edge (121) and is provided with a step face attached to the first cutting edge (111).
6. The open caisson long-distance floating transportation method according to claim 5, wherein the manufacturing of the capsule supporting plate (2) specifically comprises:
manufacturing a lower platform plate (21) according to the shape of the closed area;
fixing first section steel (23) at each partition wall (12) in the corresponding closed area on the lower platform plate (21), fixing second section steel (24) between the adjacent first section steel (23) arranged at intervals along the length direction of the lower platform plate (21), wherein the second section steel (24) is vertical to the length direction of the lower platform plate (21);
fixing an upper platform plate (22) on the upper surfaces of the first section steel (23) and the second section steel (24), and enabling the upper platform plate (22) to be located on the lower end face of the second cutting edge (121) corresponding to the closed area and to be abutted against the inclined face corresponding to the first cutting edge (111);
follow the periphery of upper landing board (22) and lower landing board (21) sets up continuous banding steel sheet, forms sealed cabin layer board (2).
7. The open caisson long distance floating method according to claim 6, wherein after said fixing the second section steel (24), further comprising:
manufacturing the ends of a first section steel (23) and a second section steel (24) with one ends positioned at the position of a well wall (11) corresponding to the closed area into a step line shape matched with the first cutting edge (111);
the part that the banding steel sheet is located this wall of a well (11) one side include with first plate body (25) that the inclined plane laminating set up, second plate body (26) and the third plate body (27) of vertical setting of level setting, second plate body (26) both ends respectively with first plate body (25) and third plate body (27) welded seal.
8. The long-distance open caisson floating transportation method according to claim 4, wherein after the manufacturing of the capsule supporting plate (2), the method further comprises: and a hanging ring is arranged on one side of the cabin sealing supporting plate (2), and the hanging ring is connected with the barge (4) through a pull rope (41).
9. The open caisson long-distance floating transportation method of claim 1, wherein: set up stagnant water structure between the bottom reason of capsule layer board (2) and closed area, specifically include:
seal cabin layer board (2) with press from both sides between the bottom reason of closed area and establish sealed pad (5), and between sealed pad (5) and sealed cabin layer board (2) and pour into stagnant water sealed glue between sealed pad (5) and the bottom reason of closed area.
10. The method for long-distance floating of the open caisson according to claim 9, wherein the step of providing the water-stopping structure further comprises:
a water stop steel plate (6) is annularly arranged at the joint of the inner wall of each closed well hole and the capsule sealing supporting plate (2), one end of the water stop steel plate (6) is fixedly welded with the inner wall of the well hole, and the other end of the water stop steel plate is fixedly welded with the capsule sealing supporting plate (2);
pouring water-stopping sealant at the welding seam of the water-stopping steel plate (6);
before water is injected into the closed well hole, the method further comprises the following steps: and (4) dismantling the water stop steel plate (6).
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| CN101182706A (en) * | 2006-11-13 | 2008-05-21 | 中交三航局第二工程有限公司 | Suspension conveying submergence method of sluice bottom board |
| CN104863170A (en) * | 2015-05-13 | 2015-08-26 | 中铁大桥局集团有限公司 | Floating transportation method for large open caisson or cofferdam |
| CN105569064A (en) * | 2015-12-10 | 2016-05-11 | 中铁大桥局集团有限公司 | Arrangement type sunk well foundation construction method applicable to deepwater bare rock |
| CN111270696A (en) * | 2020-02-24 | 2020-06-12 | 中交武汉港湾工程设计研究院有限公司 | Cabin sealing plate structure for self-floating and floating transportation of open caisson and construction method thereof |
| CN111663551A (en) * | 2020-05-21 | 2020-09-15 | 中交第二航务工程局有限公司 | Cabin sealing bottom plate structure for open caisson floating transportation and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101182706A (en) * | 2006-11-13 | 2008-05-21 | 中交三航局第二工程有限公司 | Suspension conveying submergence method of sluice bottom board |
| CN104863170A (en) * | 2015-05-13 | 2015-08-26 | 中铁大桥局集团有限公司 | Floating transportation method for large open caisson or cofferdam |
| CN105569064A (en) * | 2015-12-10 | 2016-05-11 | 中铁大桥局集团有限公司 | Arrangement type sunk well foundation construction method applicable to deepwater bare rock |
| CN111270696A (en) * | 2020-02-24 | 2020-06-12 | 中交武汉港湾工程设计研究院有限公司 | Cabin sealing plate structure for self-floating and floating transportation of open caisson and construction method thereof |
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Application publication date: 20210423 |