CN112124529A - Guide frame for salvage of sunken ship and application thereof - Google Patents
Guide frame for salvage of sunken ship and application thereof Download PDFInfo
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- CN112124529A CN112124529A CN202011171781.2A CN202011171781A CN112124529A CN 112124529 A CN112124529 A CN 112124529A CN 202011171781 A CN202011171781 A CN 202011171781A CN 112124529 A CN112124529 A CN 112124529A
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- guide frame
- drilling machine
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- sunken
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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
- B63C7/00—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects
- B63C7/16—Apparatus engaging vessels or objects
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- Earth Drilling (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention provides a guide frame for salvage of sunken ships and application thereof, comprising a working platform fixed outside a ship board of a mother ship, wherein a drilling machine base for installing a drilling machine is arranged on the working platform, a pitching adjusting device for adjusting the pitching angle of the drilling machine is arranged on the drilling machine base, the outer edge of the working platform is connected with a truss type drilling rod guide frame for guiding a drilling rod of the drilling machine, the truss type drilling rod guide frame sequentially comprises a platform hinge end, a straight pipe section, a bent pipe section and a seabed anti-sinking fixed end which are detachably connected from top to bottom, the top of the platform hinge end is connected with the working platform, and the seabed anti-sinking fixed end is connected with a seabed; a guide frame for salvage of sunken ships has an underwater positioning system. The invention can meet different water depths and realize free heave compensation by considering the influence of tide. The back dragging and threading of the large-diameter jack can be realized.
Description
Technical Field
The invention relates to the technical field of sunken ship salvage, in particular to a guide frame for sunken ship salvage and application thereof.
Background
With the rapid development of marine economic activities, sunken ship salvaging devices and salvaging methods thereof are multiple and diverse, such as methods of sealed water pumping salvaging, sealed air pumping salvaging, ship prying salvaging, buoy salvaging, floating crane salvaging, pull jack double barge prying salvaging and the like, and external forces of the methods are all transmitted to a ship body through a bottom-passing jack below a sunken ship.
In the existing cable-penetrating operation technology, the technology based on a horizontal directional drilling machine commonly used on land is gradually applied to the cable-penetrating operation. However, when the technology is applied underwater, a plurality of problems still exist, and the following points mainly exist:
(1) when the drilling machine operates on a ship, the distance from the drilling machine to a mud surface is longer, and the drill rod belongs to the problems of deformation and pressure rod stability easily caused by a slender structure. In addition, the drill pipe needs to have a proper deep supplementary function to compensate for the influence of the tide level due to the tide. Moreover, different projects have different water depths, and the leading truck can satisfy the operating capacity under the different water depths.
(2) Aiming at the problem that a large-tonnage sunken ship generally needs to select a large-diameter steel wire rope or an anchor chain for salvage, and how to efficiently pass a large-diameter over-bottom jack is always an industrial difficulty. The traditional method for threading the 110 mm-diameter steel wire rope ring generally comprises the steps of sequentially threading 3 inches, 6 inches and 6 inches of double strands and finally threading the 110 mm-diameter steel wire rope ring, the traditional method does not consider the end bearing force and the shearing resistance of a soil body, the back-dragging threading of a jack is directly realized by increasing the back-dragging force of a drilling machine, and the effect is not ideal when an anchor chain with a larger diameter needs to be threaded or the mud quality of the seabed is hard.
(3) In the engineering, a few of bottom-holding jacks are used, and the distance between every two adjacent bottom-holding jacks is 5-10 m, so that very high positioning accuracy is required for underwater threading. Since the sunken ship is a large steel metal structure, the transmission of wireless signals is seriously influenced, so that the common wireless drilling navigation system for land cannot be used.
Disclosure of Invention
According to the technical problem, the guide frame for salvage of sunken ships and the application thereof are provided.
The technical means adopted by the invention are as follows:
a guide frame for salvaging a sunken ship comprises a working platform fixed outside a ship board of a mother ship, wherein a drilling machine base for installing a drilling machine is installed on the working platform, a pitching adjusting device for adjusting the pitching angle of the drilling machine is arranged on the drilling machine base, the outer edge of the working platform is connected with a truss type drilling rod guide frame for guiding a drilling rod of the drilling machine, the truss type drilling rod guide frame sequentially comprises a platform hinge end, a straight pipe section, a bent pipe section and a seabed anti-sinking fixed end which are detachably connected from top to bottom, the top of the platform hinge end is connected with the working platform, and the seabed anti-sinking fixed end is connected with a seabed;
a guide frame for salvage of sunken ships is provided with an underwater positioning system, wherein the underwater positioning system comprises an underwater positioning beacon group, a transducer, a host and a display mechanism, wherein the underwater positioning beacon group is in wired connection with the underwater positioning beacon group;
the underwater positioning beacon group comprises two underwater positioning beacons which are respectively arranged on the seabed anti-sinking fixed end and the pipe bending section and two underwater positioning beacons at preset positions of a sunken ship;
the energy converter is arranged on the ship board of the mother ship;
the energy converter is arranged on the side of the ship board of the mother ship, the height of the energy converter is lower than the bottom of the mother ship, and the host and the display mechanism are arranged on the deck of the mother ship.
Furthermore, the drilling machine base comprises two fixed beams which are fixed on the working platform and are horizontally arranged, the front ends of the fixed beams are hinged to the bottom end of the vertical frame, the top end of the vertical frame is hinged to the front end of the transverse frame, the rear end of the transverse frame is hinged to the upper portion of the drilling machine fixed platform, the bottom of the drilling machine fixed platform is hinged to the rear end of the fixed beams, the pitching adjusting device comprises a hydraulic cylinder, one end of the hydraulic cylinder is connected with the upper portion of the vertical frame, and the other end of the hydraulic cylinder is connected with the upper portion of the drilling machine fixed platform.
Further, the platform hinged end, the straight pipe section, the bent pipe section and the seabed anti-sinking fixed end all comprise a truss and a guide cylinder installed on the truss.
Furthermore, the top of the truss at the hinged end of the platform is provided with two connecting rods which are arranged in parallel, the top of each connecting rod is in contact connection with the working platform, two chain blocks which are arranged in parallel are installed on the working platform, and the output ends of the chain blocks are respectively fixedly connected with the bottoms of the connecting rods. The relative motion between the truss type drill rod guide frame and the working platform is controlled by the chain block. When the tide level changes, the two connecting rods at the hinged end of the platform and the working platform can move up and down, and constant tension is provided between the truss type drill rod guide frame and the working platform under the control of the chain block. The mechanism can effectively realize heave compensation and corner change between the truss type drill rod guide frame and the working platform generated by tide change, and the mechanism is simple in form that the tension between the truss type drill rod guide frame and the working platform is kept through the chain block, so that the mechanism is simple and efficient.
Furthermore, the work platform is in the outside of connecting rod is installed the gag lever post, and it can prevent moving about of connecting rod, prevents the horizontal displacement between truss formula drilling rod leading truck and the work platform.
Further, the seabed anti-sinking fixed end is provided with a seabed fixing frame which is fixedly connected with the seabed.
Furthermore, the platform hinged end, the straight pipe section, the bend pipe section and the seabed anti-settling fixed end are connected through bolts to realize detachable connection, and the straight pipe sections with different depths can be adopted according to different depths.
The invention also provides a method for salvaging and threading the large-diameter bottom-mounted jack for the sunken ship, which comprises the following steps:
s1: installing a drilling machine on a drilling machine base of a guide frame for sunken ship salvaging, and adjusting the pitching angle of the drilling machine through the pitching adjusting device;
s2: starting the drilling machine, and leading a drill bit at the front end of a drill rod of the drilling machine to penetrate from one side of a sunken ship to the other side of the sunken ship under the guiding action of the truss type drill rod guide frame and the underwater positioning beacon; the underwater positioning system is mainly used for positioning when a drilling machine is lowered down, the drilling route is ensured to be consistent with the preset route, and a sunken ship is a large-scale steel metal structure, so that the transmission of wireless signals can be seriously influenced, and a common wireless drilling navigation system cannot be used; and then, outputting the data of the attitude instrument built in the drill bit in a wired transmission mode, and calculating the position of the drill rod according to the attitude of the drill bit at each step.
S3: detaching the drill bit from the drill rod, installing a back-dragging reaming bit, and connecting one end of a jack with the back-dragging reaming bit; the reaming bit is connected with the jack through a rotor mechanism. The jack can be prevented from rotating along with the reaming bit;
s4: and under the action of the drilling machine and the truss type drill rod guide frame, the back-dragging reamer bit returns to the one side of the sunken ship from the other side of the sunken ship according to the original path, and the bottom of the jack is completed.
The jack is a large-diameter steel wire rope ring.
Moreover, by the method, not only the large-diameter steel wire rope loop but also the large-diameter anchor chain can be threaded. The double-barge floating and salvage method for sinking the ship generally uses a large-diameter steel wire rope ring as a sinking ship lifting jack, but because the stroke of the steel wire stranded type jack is influenced by the width of the barge, the length of the steel wire rope ring generally needs to be accurately calculated, and the length of the steel wire rope ring of different projects needs to be reconfigured, thereby causing the waste of the projects; on the other hand, the steel wire rope clamping system of the steel wire rope type jack is still immature in technology at present, and no related construction case is available at home and abroad, so that the technical bottleneck of large-tonnage sunken ship salvage is solved by passing through the bottom anchor chain and using the chain type jack in cooperation.
Compared with the prior art, the invention has the following advantages:
(1) the truss type drill rod guide frame can meet different water depths and realize free heave compensation by considering the influence of tide.
(2) After primary drilling, the problem of threading a large-diameter over-bottom jack is solved by pulling back the reaming bit, and the method is suitable for construction of hard substrates.
(3) Aiming at the large-tonnage sunken ship double-barge lifting project, the steel strand type jack double-barge lifting is limited by the width of a barge, and the steel wire rope type jack has no similar case, but the process of the invention can solve the difficult problem of threading the large-diameter bottom-pocket anchor chain, and can achieve the expected target by matching with the conventional chain type jack.
(4) In the engineering, the bottom-holding jacks are generally few, more than dozens of jacks, and the interval between the jacks is generally controlled to be about five meters, so that the underwater threading needs very high positioning precision. The method realizes the accurate navigation function of the drilling path by combining the accurate initial positioning technology of the underwater positioning system and the drill bit posture derivation drill rod track technology.
Based on the reasons, the invention can be widely popularized in the fields of sinking and salvaging and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a guide frame for salvage of a sunken ship in accordance with an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a work platform according to an embodiment of the present invention.
FIG. 3 is a schematic view of a truss-type drill rod guide according to an embodiment of the present invention.
Fig. 4 is a schematic view of a back-drag reamer attachment in accordance with an embodiment of the present invention.
Fig. 5 is a schematic view of a back-towed borehole bottom-mounted jack in accordance with an embodiment of the present invention.
FIG. 6 is a schematic view of an underwater positioning system in accordance with an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Example 1
As shown in fig. 1 to 6, a guide frame for salvage of a sunken ship comprises a working platform 2 fixed outside a ship board of a mother ship 1, wherein a drilling machine base 4 for installing a drilling machine 3 is installed on the working platform 2, a pitching adjusting device 11 for adjusting a pitching angle of the drilling machine 3 is arranged on the drilling machine base 4, a truss type drilling rod guide frame 5 for guiding a drilling rod 301 of the drilling machine 3 is connected to the outer edge of the working platform 2, the truss type drilling rod guide frame 5 sequentially comprises a platform hinge end 501, a straight pipe section 502, a bent pipe section 503 and a seabed anti-sinking fixed end 504 which are detachably connected from top to bottom, the top of the platform hinge end 501 is connected with the working platform 1, and the seabed anti-sinking fixed end 504 is connected with a seabed 7;
a guide frame for salvage of sunken ships is provided with an underwater positioning system, wherein the underwater positioning system comprises an underwater positioning beacon group, a transducer 6 and a host display mechanism 8, wherein the underwater positioning beacon group is in wired connection with the transducer 6;
the underwater positioning beacon group 7 comprises two underwater positioning beacons 9 respectively arranged on the seabed anti-sinking fixed end 504 and the pipe bending section 503 and two underwater positioning beacons 9 at preset positions of the sunken ship 10;
the host and display means 8 are mounted on the deck of the mother vessel 1. The transducer 6 is installed on the side of the mother ship 1 and has a height lower than the bottom of the mother ship 1.
The drilling machine base 4 comprises two horizontally arranged fixed beams 401 fixed on the working platform 2, the front ends of the fixed beams 401 are hinged to the bottom ends of vertical frames 402, the top ends of the vertical frames 402 are hinged to the front ends of cross frames 403, the rear ends of the cross frames 403 are hinged to the upper portion of a drilling machine fixed platform 404, the bottom of the drilling machine fixed platform 404 is hinged to the rear ends of the fixed beams 401, the pitching adjusting device 11 comprises a hydraulic cylinder 111, one end of the hydraulic cylinder 111 is connected with the upper portion of the vertical frames 402, and the other end of the hydraulic cylinder 111 is connected with the upper portion of the drilling machine fixed platform 404.
The platform hinged end 501, the straight pipe section 502, the bent pipe section 503 and the seabed anti-sinking fixed end 504 all comprise a truss 505 and a guide cylinder 506 mounted on the truss 505.
The truss top of the platform hinged end 501 is provided with two connecting rods 507 which are arranged in parallel, the top of each connecting rod 507 is in contact connection with the working platform 2, two chain blocks 201 which are arranged in parallel are installed on the working platform 2, and the output ends of the chain blocks 201 are respectively fixedly connected with the connecting rods 507.
The working platform 2 is provided with a limiting rod 202 at the outer side of the connecting rod 507.
The seabed breakwater fixing end 504 is provided with a seabed fixing frame 508 for fixedly connecting with the seabed.
Example 2
A method for salvaging and threading a large-diameter bottom-mounted jack for a sunken ship comprises the following steps:
s1: a drilling machine 3 is arranged on a drilling machine base 4 of the guide frame for sunken ship salvaging provided by the embodiment 1, and the pitching angle of the drilling machine 3 is adjusted through the pitching adjusting device 11;
s2: starting the drilling machine 3, and leading a drill bit at the front end of a drill rod of the drilling machine 3 to penetrate from one side of a sunken ship 10 to the other side of the sunken ship 10 under the guiding action of the truss type drill rod guide frame 5 and the underwater positioning system;
s3: detaching the drill bit from the drill rod, installing a back-dragging reamer bit 12, and connecting one end of a jack 13 with the back-dragging reamer bit 12 through a rotor mechanism 14;
s4: and the back-dragging reamer bit 12 returns to the one side of the sunken ship 10 from the other side of the sunken ship 10 according to the original path under the action of the drilling machine 3, the underwater positioning system and the truss type drill rod guide frame 5, so that the bottom of the jack 13 is completed.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A guide frame for salvage of sunken ships is characterized by comprising a working platform fixed outside a ship board of a mother ship, wherein a drilling machine base for installing a drilling machine is installed on the working platform, a pitching adjusting device for adjusting the pitching angle of the drilling machine is arranged on the drilling machine base, the outer edge of the working platform is connected with a truss type drilling rod guide frame for guiding a drilling rod of the drilling machine, the truss type drilling rod guide frame sequentially comprises a platform hinge end, a straight pipe section, a bent pipe section and a seabed anti-sinking fixed end which are detachably connected from top to bottom, the top of the platform hinge end is connected with the working platform, and the seabed anti-sinking fixed end is connected with a seabed;
a guide frame for salvage of sunken ships is provided with an underwater positioning system, wherein the underwater positioning system comprises an underwater positioning beacon group, a transducer, a host and a display mechanism, wherein the underwater positioning beacon group is in wired connection with the underwater positioning beacon group;
the underwater positioning beacon group comprises two underwater positioning beacons which are respectively arranged on the seabed anti-sinking fixed end and the pipe bending section and two underwater positioning beacons at preset positions of a sunken ship;
the energy converter is arranged on the ship board of the mother ship;
the host and the display mechanism are mounted on the mother ship.
2. The guide frame for sunken ship salvaging of claim 1, wherein the drilling rig base comprises two horizontally arranged fixed beams fixed on the working platform, the front ends of the fixed beams are hinged with the bottom ends of the vertical frames, the top ends of the vertical frames are hinged with the front ends of the transverse frames, the rear ends of the transverse frames are hinged with the upper part of the drilling rig fixed platform, the bottom of the drilling rig fixed platform is hinged with the rear ends of the fixed beams, the pitching adjusting device comprises a hydraulic cylinder, one end of the hydraulic cylinder is connected with the upper part of the vertical frames, and the other end of the hydraulic cylinder is connected with the upper part of the drilling rig fixed platform.
3. A guide frame for use in sunken vessel salvage as claimed in claim 1 or 2 wherein the platform articulated end, the straight pipe section, the bend section and the seabed anti-settlement end each comprise a truss and a guide cylinder mounted on the truss.
4. The guide frame for salvage of sunken ships as claimed in claim 3, wherein the top of the truss at the hinged end of the platform is provided with two parallel connecting rods, the top of each connecting rod is in contact connection with the working platform, two parallel chain blocks are mounted on the working platform, and the output ends of the chain blocks are respectively fixedly connected with the bottom of the connecting rods.
5. A guide frame for use in salvage of sunken ships as claimed in claim 4, wherein the work platform is fitted with a stop bar outside the connecting rod.
6. The guide frame for salvage of sunken ships as claimed in claim 3, wherein the seabed anti-sinking fixed end is provided with a seabed fixing frame for fixed connection with the seabed.
7. A guide frame for use in sunken ship salvage as claimed in claim 1 wherein the transducer is mounted on the topside of the mother ship at a height below the bottom of the mother ship, the host and display mechanism being mounted on the deck of the mother ship.
8. A method for salvaging and threading a large-diameter bottom-pocket jack for a sunken ship is characterized by comprising the following steps:
s1: installing a drilling machine on a drilling machine base of the guide frame for sunken ship salvaging according to any one of claims 1 to 7, and adjusting the pitching angle of the drilling machine through the pitching adjusting device;
s2: starting the drilling machine, and leading a drill bit at the front end of a drill rod of the drilling machine to penetrate from one side of a sunken ship to the other side of the sunken ship under the guiding action of the truss type drill rod guide frame and the underwater positioning system;
s3: detaching the drill bit from the drill rod, installing a back-dragging reaming bit, and connecting one end of a jack with the back-dragging reaming bit;
s4: and under the action of the drilling machine and the truss type drill rod guide frame, the back-dragging reamer bit returns to the one side of the sunken ship from the other side of the sunken ship according to the original path, and the bottom of the jack is completed.
9. The method for salvaging the large-diameter bottom-mounted jack for the sunken ship according to claim 8, wherein the method comprises the following steps:
in step S3, the reamer head is connected to the jack by a rotator mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010317594.4A CN111377038A (en) | 2020-04-21 | 2020-04-21 | Guide frame for salvage of sunken ship and application thereof |
| CN2020103175944 | 2020-04-21 |
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| CN112124529A true CN112124529A (en) | 2020-12-25 |
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| CN202010317594.4A Pending CN111377038A (en) | 2020-04-21 | 2020-04-21 | Guide frame for salvage of sunken ship and application thereof |
| CN202011171781.2A Pending CN112124529A (en) | 2020-04-21 | 2020-10-28 | Guide frame for salvage of sunken ship and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889776A (en) * | 2022-04-12 | 2022-08-12 | 交通运输部上海打捞局 | Sectional type top beam structure for fishing of arc-shaped beam non-contact integral fishing device |
| CN115258094A (en) * | 2022-08-11 | 2022-11-01 | 交通运输部上海打捞局 | Method for threading fishing steel wire based on horizontal directional drilling truss system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889772B (en) * | 2022-04-12 | 2023-07-21 | 上海隧道工程有限公司 | Launching cradle structure for arc Liang Dingguan and installation method thereof |
| CN114776229B (en) * | 2022-04-25 | 2024-01-23 | 中铁大桥勘测设计院集团有限公司 | Water area CPTU test system and test method |
-
2020
- 2020-04-21 CN CN202010317594.4A patent/CN111377038A/en active Pending
- 2020-10-28 CN CN202011171781.2A patent/CN112124529A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889776A (en) * | 2022-04-12 | 2022-08-12 | 交通运输部上海打捞局 | Sectional type top beam structure for fishing of arc-shaped beam non-contact integral fishing device |
| CN114889776B (en) * | 2022-04-12 | 2023-06-20 | 交通运输部上海打捞局 | Sectional top beam structure for salvaging arc beam non-contact integral salvaging device |
| CN115258094A (en) * | 2022-08-11 | 2022-11-01 | 交通运输部上海打捞局 | Method for threading fishing steel wire based on horizontal directional drilling truss system |
| CN115258094B (en) * | 2022-08-11 | 2023-06-30 | 交通运输部上海打捞局 | Method for threading salvaging steel wires based on horizontal directional drilling truss system |
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| CN111377038A (en) | 2020-07-07 |
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