CN118029416A - Transfer construction method for oversized anti-collision pouring jacket cofferdam - Google Patents
Transfer construction method for oversized anti-collision pouring jacket cofferdam Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 40
- 238000012546 transfer Methods 0.000 title claims abstract description 8
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- 238000003032 molecular docking Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
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Abstract
The invention provides a transfer construction method of an oversized anti-collision sleeve box cofferdam, which relates to the field of bridge cofferdam construction, wherein the external dimension of the existing cofferdam is far beyond the width of a gantry crane and a barge and is difficult to transport through a conventional wharf, the gantry crane and the barge based on limited construction conditions.
Description
Technical Field
The invention relates to the field of bridge cofferdam construction, in particular to a transfer construction method for an oversized anti-collision pouring jacket cofferdam.
Background
The anticollision pouring jacket cofferdam is an engineering structure and is generally used in the fields of hydraulic engineering, river management, harbor construction and the like. The main function of the device is to prevent water flow, waves and the like from scouring and eroding the engineering structure, and protect the safety and stability of the engineering structure.
An anti-collision box cofferdam is generally composed of a plurality of boxes, each of which is internally filled with concrete or other material to increase its weight and stability. The sleeve boxes are connected through connecting pieces to form an integral structure. In water area environments such as rivers, coasts and the like, the anti-collision box cofferdam can effectively resist the impact of water flow and waves, and abrasion and damage of engineering structures are reduced.
In a word, anticollision pouring jacket cofferdam is an important engineering structure, can protect engineering structure's safety and stability effectively, reduces the influence of rivers, wave etc. to the environment, has certain flood control simultaneously.
The existing large-scale anti-collision box cofferdam on the sea is manufactured and transported, the common construction difficulty is high, the safety risk is high, and the factory sectional manufacturing, the whole assembly process construction and the transport ship transportation are generally adopted. However, because the large anti-collision sleeve box cofferdam on the sea is huge in weight and size, the conventional construction wharf and barge are difficult to transport, the construction cost of the large barge and the construction wharf is extremely high, the number of the large barge and the gantry crane in China is extremely small, the arrangement period is long, and the project construction period is seriously delayed, so that how to adapt to the unique ocean environment and limited construction conditions, the construction risk and difficulty are reduced, the cost of mechanical equipment is reduced, and the construction period is shortened to be a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects in the prior art and providing the transfer construction method for the oversized anti-collision pouring jacket cofferdam, which can reduce construction risk and difficulty, reduce the cost of mechanical equipment, shorten the construction period, greatly improve the economical efficiency and the safety of the construction process and has good use value for practical engineering.
The invention is realized by the following technical scheme:
an oversized anti-collision pouring jacket cofferdam transferring construction method comprises the following steps:
Step 1, splicing cofferdam components into two symmetrical groups of half-cofferdam mechanisms which can be spliced in a single element processing area according to a cofferdam design drawing;
step 2, symmetrically and fixedly arranging a plurality of groups of spliced platform beam bodies on the barge in advance, wherein one end of each platform beam body is flush with the edge of the barge;
Step 3, respectively hoisting the two groups of half cofferdam mechanisms to the two groups of barges parked in the dock in sequence by using a gantry crane, connecting the lower ends of the half cofferdam mechanisms with the platform beam body through a plurality of groups of sliding block units, and primarily locking the half cofferdam mechanisms and the platform beam body;
Step 4, respectively loading the two groups of barges with the half cofferdam mechanisms, driving out of the shipyards, adjusting and pulling the two groups of barges through a barge docking system, wherein the barge docking system is used for adjusting the distances between the two groups of barges in the ship direction and the transverse direction and the direction perpendicular to the sea surface direction, so that the heights of the barges on the sea level are consistent, the bow and the stern are aligned correspondingly, and then primary locking connection is carried out on the two groups of barges through a primary locking mechanism;
step 5, splicing and fixedly connecting the platform beam bodies of the two groups of barges to form a secondary locking mechanism;
Step 6, gradually pushing the half cofferdam mechanisms on the two groups of barges towards the middle part through a counter-pulling mechanism, so that the two groups of half cofferdam mechanisms are spliced and fixedly connected into a complete cofferdam, and the counter-pulling mechanism and the complete cofferdam form a three-level locking mechanism;
And step s7, the marine transportation system drives the barge transportation cofferdam to integrally translate to a set position.
According to the technical scheme, the external dimension of the existing cofferdam is far beyond the width of the gantry crane and the barge and is difficult to transport through a conventional wharf and barge, so that the cofferdam is creatively assembled into two symmetrical groups of half-cofferdam mechanisms which can be spliced, the half-cofferdam mechanisms are respectively hoisted to two groups of barges, the cofferdam mechanisms are assembled in a port without stormy waves, the barges are firstly spliced, and then the cofferdams are assembled into a whole through a barge docking system and a counter-pulling mechanism, so that the cofferdam assembly and safe transportation are realized in a multistage locking mechanism mode, the subsequent integral hoisting construction is facilitated, the construction risk and the construction difficulty are further reduced, the mechanical equipment cost is reduced, the construction period is shortened, the economical efficiency and the safety of the construction process are greatly improved, and the practical engineering use value is good.
According to the technical scheme, preferably, the platform beam body in the step s2 is fixedly connected with the barge through a plurality of groups of supporting components, the supporting components comprise inclined struts, fixed clamping seats and shoveling pads, the inclined struts and the fixed clamping seats are welded and fixed on the barge, the shoveling pads are fixedly connected with the inclined struts and the fixed clamping seats, and the upper ends of the shoveling pads are propped against the lower surface of the cofferdam.
According to the above technical solution, preferably, the barge docking system in step s4 includes a stabilizing subsystem for adjusting the draft of the two sets of barges so that the heights of the half cofferdam mechanisms of the two sets of barges are leveled, and a steering subsystem for adjusting the angles of the two sets of barges so that the bow and stern of the two sets of barges are aligned accordingly.
According to the above technical scheme, preferably, the stabilizing subsystem comprises a plurality of groups of water storage containers arranged on the barge, and the water storage containers are used for adjusting the distance between the left side and the right side of the barge and the direction perpendicular to the sea surface.
According to the above technical solution, preferably, the steering subsystem comprises a plurality of groups of anchor winches arranged on the front and rear sides of the barge, and the anchor winches are used for adjusting the distance between the forward direction and the transverse direction of the barge.
According to the technical scheme, preferably, the opposite-pulling mechanism in the step s6 comprises a jack, a working anchor and stress steel strands, wherein the jack and the working anchor are respectively fixed on the corresponding slide block units of the two groups of barges, the jack pulls the working anchor to slide towards the middle part through the stress steel strands, the half cofferdam mechanisms on the two groups of barges slide towards the middle part under the driving of the slide block units until the two groups of half cofferdam mechanisms are spliced and welded into an integral cofferdam, and the opposite-pulling mechanism and the spliced cofferdam form a three-stage locking mechanism.
According to the technical scheme, preferably, the stabilizing subsystem further comprises a dynamic detection mechanism, wherein the dynamic detection mechanism is used for monitoring the integral stress change of the platform beam body in the working process of the opposite-pull mechanism, and water injection or drainage operation is carried out on the water storage containers on two sides of the barge, so that the gravity of the two groups of half cofferdam mechanisms towards the middle part is prevented from exceeding the pressure threshold value of the platform beam body.
According to the technical scheme, as the opposite-pulling mechanism works and advances, the two groups of half cofferdam mechanisms gradually approach to the splicing positions of the two groups of barges, at the moment, the main stress members of the cofferdam are the platform beam bodies for connecting the two groups of barges, but the weight of the cofferdam is extremely large, if the platform beam bodies are simply relied on, the specification and the size of the platform beam bodies are extremely large in order to meet the safety requirements, so that the applicant can perform water drainage operation on the water storage containers on the inner sides of the barges, perform water injection operation on the water storage containers on the outer sides of the barges, further balance the weight on the two sides of the barges, and effectively weaken the pressure born by the platform beam bodies.
According to the technical scheme, preferably, the dynamic detection mechanism comprises a plurality of groups of pressure sensing pieces and a simulation terminal, wherein the groups of pressure sensing pieces and the simulation terminal are arranged on the platform beam body, the pressure sensing pieces are used for sensing the tensile and compressive stress values born by the platform beam body, and conveying the tensile and compressive stress values to the simulation terminal for calculation, so that water injection or drainage operation is determined for the water storage containers on two sides of the barge.
According to the technical scheme, the pressure sensing piece is used for sensing the tensile and compressive stress value born by the platform beam body, conveying the tensile and compressive stress value to the simulation terminal for calculation, and determining the speed of water storage containers on two sides of the barge for water injection or drainage operation.
According to the above-described aspect, preferably, the marine transport system includes a plurality of tugs for towing the barge, the plurality of tugs being disposed around the barge.
The beneficial effects of the invention are as follows:
(1) The stabilizing subsystem is used for splicing the platform beam bodies in the early stage, the platform beam bodies of the two groups of barges are spliced and fixedly connected to form a secondary locking mechanism, and simultaneously, when the cofferdam is spliced in the later stage, water storage containers on two sides of the barges are subjected to water injection or drainage operation, so that the gravity of the two groups of half cofferdam mechanisms, which are closed towards the middle part, is prevented from exceeding the pressure threshold value of the platform beam bodies, and the opposite-pulling mechanism and the spliced cofferdam form a tertiary locking mechanism;
(2) The invention is based on limited construction conditions, the external dimension of the existing cofferdam far exceeds the width of a gantry crane and a barge, and the cofferdam is difficult to transport through a conventional wharf and a barge, so the invention creatively proposes to assemble cofferdam components into two symmetrical groups of half-cofferdam mechanisms which can be spliced, respectively hoist the two groups of barges, assemble the barges in a port without stormy waves, splice the cofferdams into a whole through a barge docking system and a counter-pulling mechanism, and realize the assembly and safe transportation of the cofferdam in a mode of a primary locking mechanism, a secondary locking mechanism and a multi-stage locking mechanism of a tertiary locking mechanism, thereby facilitating the subsequent integral hoisting construction;
(3) The invention effectively reduces construction risk and difficulty, reduces mechanical equipment cost, shortens construction period, greatly improves economical efficiency and safety of construction process, and has good use value for actual engineering.
Drawings
FIG. 1 shows a schematic flow diagram of the present invention;
FIG. 2 shows a dock layout of a semi-cofferdam structure lifting barge;
FIG. 3 is a schematic view showing the splice connection of two sets of barges, where the half cofferdam mechanisms of the two sets of barges have not yet been spliced;
FIG. 4 shows a schematic cross-sectional view in the direction A-A of FIG. 3;
FIG. 5 shows a schematic cross-sectional view in the direction B-B in FIG. 3;
FIG. 6 illustrates a front view of the support assembly;
FIG. 7 shows a top view of the support assembly;
FIG. 8 shows a plan view of the entire hauling of the cofferdam, where the half cofferdam mechanisms of the two sets of barges have been spliced into an integral cofferdam;
FIG. 9 shows a schematic workflow diagram of a stabilization subsystem;
reference numerals illustrate:
1. A half cofferdam mechanism; 2. a platform beam body; 3. barge; 4. a gantry crane; 5. a slider unit; 6. a dock; 7. a barge docking system; 8. a stabilization subsystem; 9. a steering subsystem; 10. a counter-pulling mechanism; 11. a jack; 12. a working anchor; 13. stress steel strand; 14. towing a boat; 15. diagonal bracing; 16. a fixing clamping seat; 17. a shoveling pad; 18. a cofferdam; 19. an anchor winch; 20. a water storage container.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and preferred embodiments, so that those skilled in the art can better understand the technical solutions of the present invention. All other embodiments, based on the embodiments of the invention, which would be apparent to one of ordinary skill in the art without making any inventive effort are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
As shown in fig. 1-9, the invention provides a transfer construction method of an oversized anti-collision pouring jacket cofferdam, which comprises the following steps:
Step 1, splicing cofferdam components into two symmetrical half-cofferdam mechanisms 1 which can be spliced in a single element processing area according to a design drawing of the cofferdam 18;
step s2, symmetrically and fixedly arranging a plurality of groups of spliced platform beam bodies 2 on the barge 3 in advance, wherein one end of each platform beam body 2 is flush with the edge of the barge 3;
step 3, respectively hoisting two groups of half cofferdam mechanisms 1 to two groups of barges 3 parked at a dock 6 in sequence by using a gantry crane 4, wherein the lower ends of the half cofferdam mechanisms 1 are connected with a platform beam body 2 through a plurality of groups of sliding block units 5, and the half cofferdam mechanisms 1 and the platform beam body 2 are preliminarily locked;
Step s4, two sets of barges 3 are respectively loaded with a half cofferdam mechanism 1 and driven out of a dock 6, the two sets of barges 3 are pulled through the barge docking system 7, the barge docking system 7 is used for adjusting the distance between the two sets of barges 3 in the direction along the ship and the direction perpendicular to the sea surface, the two sets of barges 3 are enabled to be in height consistency on the sea surface, the bow and the stern are correspondingly aligned, the two sets of barges 3 are connected in a primary locking manner through a primary locking mechanism, the primary locking mechanism can adopt cable lashing and the like, wherein the barge docking system 7 comprises a stabilizing subsystem 8 and a steering subsystem 9, the stabilizing subsystem 8 is used for adjusting the draft of the two sets of barges 3, the stabilizing subsystem 8 comprises a plurality of water storage containers arranged on the barges 3, the weight of the water storage containers is adjusted through water injection or drainage, the water storage containers can be used for adjusting the distance between the left side and the right side of the barges 3 in the direction perpendicular to the sea surface, the steering subsystem 9 is used for adjusting the angle of the two sets of barges 3, the bow and the stern of the barges 3 are correspondingly aligned, the bow and the stern of the two sets of barges 3 can be used for adjusting the bow and the stern of the barges 3, the mooring system 9 comprises a plurality of anchor pairs 19 which are arranged on the front and the winch 19 and the steering subsystem 19 is used for adjusting the distance between the ship and the ship 19;
step 5, splicing and fixedly connecting the platform beam bodies 2 of the two groups of barges 3 to form a secondary locking mechanism;
Step 6, gradually pushing the half cofferdam mechanisms 1 on the two groups of barges 3 towards the middle through a counter pulling mechanism 10, so that the two groups of half cofferdam mechanisms 1 are spliced and fixedly connected to form a complete cofferdam, the counter pulling mechanism and the complete cofferdam form a three-level locking mechanism, wherein the counter pulling mechanism 10 comprises a jack 11, a working anchor 12 and a stress steel strand 13, the jack 11 and the working anchor 12 are respectively fixed on slide block units 5 corresponding to the two groups of barges 3, the jack 11 pulls the working anchor 12 to slide towards the middle through the stress steel strand 13, the half cofferdam mechanisms 1 on the two groups of barges 3 slide towards the middle under the driving of the slide block units 5 until the two groups of half cofferdam mechanisms 1 are spliced and welded to form an integral cofferdam 18, and the counter pulling mechanism 10 and the spliced cofferdam 18 form the three-level locking mechanism;
Step s7, the sea transportation system drives the barge 3 to transport the cofferdam 18 to be translated to the set position as a whole, and the sea transportation system includes a plurality of tugs 14 for pulling the barge 3, and the plurality of tugs 14 are arranged around the barge 3.
The invention is based on limited construction conditions, the external dimension of the existing cofferdam 18 far exceeds the width of the gantry crane 4 and the barge 3, and is difficult to transport through a conventional wharf and the barge 3, so the invention creatively proposes to assemble the cofferdam components into two symmetrical groups of half-cofferdam mechanisms 1 which can be spliced, respectively hoist the two groups of barges 3, assemble the cofferdam in a port without stormy waves, splice the barge 3 firstly, and then splice the cofferdam 18 into a whole through a barge docking system 7 and a counter-pulling mechanism 10, thereby realizing the assembly and safe transportation of the cofferdam 18 in a multi-stage locking mechanism mode, facilitating the subsequent integral hoisting construction, further reducing the construction risk and difficulty, reducing the mechanical equipment cost, shortening the construction period, greatly improving the economy and safety of the construction process, and having good use value for practical engineering.
Further, the stabilizing subsystem 8 further comprises a dynamic detecting mechanism, the dynamic detecting mechanism is used for monitoring the overall stress change of the platform beam body 2 in the working process of the opposite-pulling mechanism 10, and water injection or drainage operation is carried out on the water storage containers at two sides of the barge 3, so that the gravity for the two groups of half cofferdam mechanisms 1 to approach the middle exceeds the pressure threshold of the platform beam body 2, along with the working and pushing of the opposite-pulling mechanism 10, the two groups of half cofferdam mechanisms 1 gradually approach the joint of the two groups of barges 3, at the moment, the main stress members of the cofferdam 18 are the platform beam bodies 2 connected with the two groups of barges 3, but the weight of the cofferdam 18 is extremely high, and if the platform beam body 2 is simply relied on, the specification and the size of the platform beam body 2 are extremely high, so that in order to meet the safety requirements, in order to avoid the problems, the applicant carries out water injection operation on the water storage containers at the outer side of the barge 3, so that the weight at two sides of the barge 3 can be balanced, and the pressure born by the platform beam body 2 is effectively weakened.
Further, the dynamic detection mechanism comprises a plurality of groups of pressure sensing sheets and simulation terminals which are arranged on the platform beam body 2, wherein the pressure sensing sheets are used for sensing the tensile stress value born by the platform beam body 2 and conveying the tensile stress value to the simulation terminals for calculation to determine that water storage containers at two sides of the barge 3 are subjected to water injection or drainage operation, the stabilizing subsystem 8 is not only used for splicing the platform beam body 2 in the early stage, but also fixedly connecting the platform beam bodies 2 of the two groups of barges 3 to form a secondary locking mechanism, and simultaneously, when the cofferdam 18 is spliced in the later stage, the water storage containers at two sides of the barge 3 are subjected to water injection or drainage operation to prevent the gravity of the two groups of half cofferdam mechanisms 1 approaching the middle part from exceeding the pressure threshold value of the platform beam body 2, so that the opposite-pulling mechanism 10 and the spliced cofferdam 18 can form a tertiary locking mechanism.
Further, the platform beam body 2 in step s2 is fixedly connected with the barge 3 through a plurality of groups of supporting components, each supporting component comprises a diagonal brace 15, a fixed clamping seat 16 and a shoveling pad 17, the diagonal brace 15 and the fixed clamping seat 16 are welded and fixed on the barge 3, the shoveling pad 17 is fixedly connected with the diagonal brace 15 and the fixed clamping seat 16, and the upper end of the shoveling pad 17 abuts against the lower surface of the cofferdam 18.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (9)
1. The transfer construction method of the oversized anti-collision pouring jacket cofferdam is characterized by comprising the following steps of:
Step 1, splicing cofferdam components into two symmetrical groups of half-cofferdam mechanisms which can be spliced in a single element processing area according to a cofferdam design drawing;
step 2, symmetrically and fixedly arranging a plurality of groups of spliced platform beam bodies on the barge in advance, wherein one end of each platform beam body is flush with the edge of the barge;
Step 3, respectively hoisting the two groups of half cofferdam mechanisms to the two groups of barges parked in the dock in sequence by using a gantry crane, connecting the lower ends of the half cofferdam mechanisms with the platform beam body through a plurality of groups of sliding block units, and primarily locking the half cofferdam mechanisms and the platform beam body;
Step 4, respectively loading the two groups of barges with the half cofferdam mechanisms, driving out of the shipyards, adjusting and pulling the two groups of barges through a barge docking system, wherein the barge docking system is used for adjusting the distances between the two groups of barges in the ship direction and the transverse direction and the direction perpendicular to the sea surface direction, so that the heights of the barges on the sea level are consistent, the bow and the stern are aligned correspondingly, and then primary locking connection is carried out on the two groups of barges through a primary locking mechanism;
step 5, splicing and fixedly connecting the platform beam bodies of the two groups of barges to form a secondary locking mechanism;
Step 6, gradually pushing the half cofferdam mechanisms on the two groups of barges towards the middle part through a counter-pulling mechanism, so that the two groups of half cofferdam mechanisms are spliced and fixedly connected into a complete cofferdam, and the counter-pulling mechanism and the complete cofferdam form a three-level locking mechanism;
And step s7, the marine transportation system drives the barge transportation cofferdam to integrally translate to a set position.
2. The transfer construction method of the oversized anti-collision sleeve cofferdam according to claim 1, wherein the platform beam body in the step s2 is fixedly connected with the barge through a plurality of groups of supporting components, the supporting components comprise diagonal braces, fixed clamping bases and shoveling pads, the diagonal braces and the fixed clamping bases are welded and fixed on a barge, the shoveling pads are fixedly connected with the diagonal braces and the fixed clamping bases, and the upper ends of the shoveling pads are propped against the lower surface of the cofferdam.
3. A method of transferring oversized anti-collision casing cofferdam as in claim 1, wherein said barge docking system in step s4 comprises a stabilizing subsystem for adjusting the draft of the two sets of barges so that the height of the half cofferdam mechanism of the two sets of barges is leveled, and a steering subsystem for adjusting the angle of the two sets of barges so that the bow and stern of the two sets of barges are aligned accordingly.
4. A method of transferring an oversized anti-collision sleeve cofferdam as in claim 3, wherein said stabilizing subsystem comprises a plurality of sets of water storage containers disposed on the barge, said water storage containers being used to adjust the distance between the left and right sides of the barge in the direction perpendicular to the sea surface.
5. The method for transferring and constructing the oversized anti-collision sleeve cofferdam of claim 4, wherein the steering subsystem comprises a plurality of groups of anchor winches arranged on the front side and the rear side of the barge, and the anchor winches are used for adjusting the distance between the forward direction and the transverse direction of the barge.
6. The method for transferring and constructing the oversized anti-collision sleeve cofferdam according to claim 1, wherein the counter-pulling mechanism in the step s6 comprises a jack, a working anchor and stress steel strands, the jack and the working anchor are respectively fixed on slide block units corresponding to two groups of barges, the jack pulls the working anchor to slide towards the middle through the stress steel strands, the half cofferdam mechanisms on the two groups of barges slide towards the middle under the driving of the slide block units until the two groups of half cofferdam mechanisms are spliced and welded into an integral cofferdam, and the counter-pulling mechanism and the spliced cofferdam form a three-stage locking mechanism.
7. The method for transferring and constructing the oversized anti-collision sleeve cofferdam according to claim 4, wherein the stabilizing subsystem further comprises a dynamic detection mechanism, the dynamic detection mechanism is used for monitoring the integral stress change of the platform beam body in the working process of the opposite-pull mechanism, and the water storage containers on two sides of the barge are subjected to water injection or drainage operation, so that the gravity of the two groups of half cofferdam mechanisms approaching to the middle is prevented from exceeding the pressure threshold value of the platform beam body.
8. The method for transferring and constructing the oversized anti-collision pouring jacket cofferdam according to claim 7, wherein the dynamic detection mechanism comprises a plurality of groups of pressure sensing pieces and simulation terminals, wherein the groups of pressure sensing pieces are arranged on the platform beam body, the pressure sensing pieces are used for sensing the tensile and compressive stress values born by the platform beam body, and the tensile and compressive stress values are transmitted to the simulation terminals for calculation, so that water injection or drainage operation is determined on water storage containers on two sides of the barge.
9. A method of transferring an oversized anti-collision box cofferdam as in claim 1, wherein said marine transport system comprises a plurality of tugs towing the barge, a plurality of said tugs being deployed around the perimeter of the barge.
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| CN111005395A (en) * | 2020-01-02 | 2020-04-14 | 中交第三航务工程局有限公司 | Construction process for assembling first-section steel cofferdam on water |
| CN213508515U (en) * | 2020-10-09 | 2021-06-22 | 中交二航局第四工程有限公司 | Integral assembly structure of inland river large cofferdam depending on ship |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08120680A (en) * | 1994-10-26 | 1996-05-14 | Nittoc Constr Co Ltd | Earth retaining cofferdam execution method in maritime work |
| CN108797550A (en) * | 2018-05-09 | 2018-11-13 | 中交公局第二工程有限公司 | The special-shaped super large cushion cap of pile foundation layout has the construction method of bottom casing |
| CN109653227A (en) * | 2019-01-08 | 2019-04-19 | 中铁大桥局集团有限公司 | A kind of sliding launch device of heavy steel cofferdam |
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| CN118029416B (en) | 2024-06-07 |
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