CN112628465B - A method for onshore installation of ultra-large diameter GRP pipes - Google Patents
A method for onshore installation of ultra-large diameter GRP pipes Download PDFInfo
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- CN112628465B CN112628465B CN202011607912.7A CN202011607912A CN112628465B CN 112628465 B CN112628465 B CN 112628465B CN 202011607912 A CN202011607912 A CN 202011607912A CN 112628465 B CN112628465 B CN 112628465B
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- pipeline
- installation
- sleeve
- anchor ear
- anchor
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- 238000009434 installation Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010276 construction Methods 0.000 claims abstract description 8
- 239000004576 sand Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 210000005069 ears Anatomy 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000013535 sea water Substances 0.000 abstract description 3
- 239000011152 fibreglass Substances 0.000 description 8
- 239000000314 lubricant Substances 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
- F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
- B66C1/18—Band-type slings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
- F16L1/09—Accessories therefor, e.g. anchors for bringing two tubular members closer to each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supports For Pipes And Cables (AREA)
Abstract
本发明涉及管路施工技术领域，特别是海水循环系统中超大直径GRP管道陆上拉合安装，具体为一种超大直径GRP管道陆上安装的方法。该方法管道拉合的具体步骤如下：第一步：制作抱箍；第二步：安装抱箍，将抱箍分别安装于已安装管道和待安装管道相邻端的端头；第三步：安装套筒，同步操作多个手扳葫芦，将套筒拉合至设计位置；第四步：管道安装，通过同步操作手扳葫芦，使待安装管道的端头插入套筒内，若待安装管道的安装精度不符合标准，需进行管道退管；第五步：管道回填，将安装管道放置于弧形槽内，管底两侧进行回填砂。本发明相较于传统工艺的安装方法，使安装效率及安装质量得到提高，提高安装精度，结构简单，大大缩短施工周期。
The present invention relates to the field of pipeline construction technology, in particular to the onshore pulling and closing installation of super-large diameter GRP pipelines in seawater circulation systems, and specifically to a method for onshore installation of super-large diameter GRP pipelines. The specific steps of the pipeline pulling and closing of the method are as follows: the first step: making a clamp; the second step: installing the clamp, and installing the clamp on the ends of the installed pipeline and the adjacent ends of the pipeline to be installed respectively; the third step: installing the sleeve, synchronously operating multiple hand-operated hoists, and pulling the sleeve to the designed position; the fourth step: pipeline installation, by synchronously operating the hand-operated hoists, the end of the pipeline to be installed is inserted into the sleeve. If the installation accuracy of the pipeline to be installed does not meet the standard, the pipeline needs to be withdrawn; the fifth step: pipeline backfilling, placing the installed pipeline in an arc groove, and backfilling sand on both sides of the bottom of the pipe. Compared with the installation method of the traditional process, the present invention improves the installation efficiency and installation quality, improves the installation accuracy, has a simple structure, and greatly shortens the construction period.
Description
Technical Field
The invention relates to the technical field of pipeline construction, in particular to a method for on-land installation of oversized-diameter GRP pipelines Liu Shangla in a seawater circulating system.
Background
In sea water circulation system, usually can use super large diameter GRP (glass fiber reinforced plastic) pipeline, glass fiber reinforced plastic pipeline connection installation mode mainly includes joint pasting, half joint and sleeve joint now, wherein pasting joint needs on-the-spot pasting, construction condition is harsh (guarantee pasting condition is dry), the installation cost of half joint is higher, unsuitable large-scale use, sleeve joint application scope is wide, with low costs, sleeve joint pipeline installation's traditional technology is the suspender hoist and mount, after the single chain block is hung the knot on the suspender respectively in pipeline both sides again, utilize chain block to carry out the pull and close installation, this installation technology draws long time, because the suspender is soft material, difficult control, consequently pull and close precision control effect is relatively poor.
Disclosure of Invention
In order to solve the problems that the traditional process for installing the sleeve joint pipeline is hanging by hanging the hanging strips, and then after the two sides of the pipeline are respectively hung and buckled on the hanging strips, the single chain block is used for pulling and closing installation.
The technical scheme adopted by the invention for realizing the purpose is that the land installation method of the oversized-diameter GRP pipeline comprises the following specific installation steps:
firstly, manufacturing a hoop, and carrying out hoop processing according to a pipeline design drawing before construction;
Installing anchor clamps, namely respectively installing the anchor clamps at the ends of the adjacent ends of the installed pipeline and the pipeline to be installed, wherein a plurality of pulling plates are uniformly arranged on the outer sides of the anchor clamps;
the third step, the sleeve is installed, the lever blocks are hung and buckled on the pulling plate of the anchor ear on the installed pipeline, the locking device is hung on the sleeve, the installation positions correspond to the positions of the lever blocks one by one, and the pulling plate and the locking device are connected through the lever blocks;
The fourth step of pipeline installation, namely correspondingly installing a lever hoist on the installed pipeline and a pulling plate of a hoop on the pipeline to be installed, ensuring that the axes and the heights of the installed pipeline and the pipeline to be installed are consistent, enabling the end head of the pipeline to be installed to be inserted into a sleeve through synchronous operation of a plurality of lever hoists, keeping the advancing speed and the distance of a monitoring pipeline consistent in the installation process, and if the installation precision of the pipeline to be installed does not meet the standard, carrying out pipeline withdrawal;
and fifthly, backfilling the pipeline, placing the installed pipeline in the dug arc-shaped groove, rechecking the elevation of the top of the pipeline, and performing backfilling sand on the two sides of the bottom of the pipeline after reaching the allowable error so as to avoid the offset of the installed pipeline caused by the butt joint of the subsequent pipelines.
In the fourth step, when the pipe is required to be withdrawn, a steel base support piece is placed at the sleeve of the pipe orifice of the pipe to be withdrawn, a plurality of jacks are placed between the pull plate of the anchor ear on the pipe to be withdrawn and the steel base support piece, a plurality of square woods are placed between the sleeve of the upper end of the installed pipe and the anchor ear, the sleeve displacement in the pipe withdrawal process is prevented, the jacks are synchronously operated, and the pipe to be withdrawn is ejected out of the sleeve.
Further, the steel collet is hollow triangle-shaped structure, including rectangular frame, the fixed triangle-shaped braced frame that is equipped with on two relative frames on the rectangular frame, the fixed backup pad that is equipped with on the remaining two relative frames of rectangular frame, backup pad and triangle-shaped braced frame fixed connection simultaneously.
Further, in the second step, the staple bolt is 4, and the both ends of staple bolt are equipped with the bolt hole respectively, carries out fixed connection through the bolt between the staple bolt, during the staple bolt installation, connect three in 4 staple bolt through the bolt and form 3/4 circular arc, the suit is on the pipeline end, later gets into and be connected to former 3/4 circular arc with 4 th staple bolt through the pipeline end, and finally utilize the bolt to connect and be fixed in the staple bolt and be located 70-90cm apart from the pipeline end.
Further, in the second step, a rubber gasket is fixedly arranged on the inner side of the anchor ear, and a connecting hole matched with the lever block is formed in the pulling plate.
Compared with the traditional installation method, the method for installing the oversized-diameter GRP pipeline on land has the advantages that the plurality of chain blocks are matched with the anchor clamps, the sleeve is installed at the port of the installed pipeline by synchronously operating the chain blocks, then the pipeline to be installed is installed with the sleeve by synchronously operating the chain blocks by utilizing the matching of the chain blocks and the anchor clamps, the installation efficiency and the installation quality are improved by synchronously operating the chain blocks, the installation precision is improved, the structure is simple, the construction period is greatly shortened, meanwhile, the anchor clamp device can be used for pipeline pipe withdrawal operation, the application range is wide, the rubber gasket is fixedly arranged on the inner side of the anchor clamps, the tight fit between the pipeline and the anchor clamps is ensured, the friction force between the anchor clamps and the pipeline is increased, the connecting holes matched with the chain blocks are formed in the chain blocks, the chain blocks play a role of supporting and receiving force on the chain blocks, and meanwhile, when the pipeline is withdrawn, the chain blocks serve as stress supporting points of the jack, and the pipeline is withdrawn.
Drawings
FIG. 1 is a schematic view of a pipe pulling structure according to the present invention;
FIG. 2 is a schematic illustration of the structure of the anchor ear of the present invention;
FIG. 3 is a front view of the anchor ear of the present invention;
FIG. 4 is a top view of the anchor ear of the present invention;
FIG. 5 is a schematic view of the structure of the pull plate on the anchor ear of the present invention;
FIG. 6 is a schematic view of a pipe withdrawal structure according to the present invention;
FIG. 7 is a schematic view of a steel shoe of the present invention;
The device comprises a 1-pipeline to be installed, a 2-installed pipeline, a 3-sleeve, a 4-anchor ear, a 5-lever block, a 6-pulling plate, 7-bolt holes, 8-rubber gaskets, 9-connecting holes, 10-jacks, 11-steel bottom support pieces, 12-square timber, 13-rectangular frames, 14-triangular support frames, 15-support plates and 16-pipeline to be retreated.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Examples:
as shown in fig. 1-7, a land installation method for oversized diameter GRP pipeline comprises the following steps:
firstly, manufacturing a hoop, and processing the hoop 4 according to a pipeline design drawing before construction;
Installing anchor clamps, namely installing anchor clamps 4 at the ends of the adjacent ends of the installed pipeline 2 and the pipeline 1 to be installed respectively, uniformly arranging 4 pull plates 6 on the outer side of the anchor clamps 4, fixedly arranging rubber gaskets 8 on the inner side of the anchor clamps 4, and arranging connecting holes 9 matched with the lever blocks 5 on the pull plates 6;
The anchor ear 4 is 4, two ends of the anchor ear 4 are respectively provided with bolt holes 7, the anchor ears 4 are fixedly connected through bolts, when the anchor ear 4 is installed, three anchor ears in the 4 anchor ears are connected through bolts to form 3/4 circular arcs and sleeved on the end of a pipeline, then the 4 th anchor ear enters through the end of the pipeline and is connected to the original 3/4 circular arcs, and finally the anchor ear is fixed at a position 80cm away from the end of the pipeline by utilizing the bolts for connection;
The third step, the sleeve is installed, the sleeve 3 is wound around the sleeve 3 by a car sealing belt or a 3t hanging belt for one circle and then fixed, firstly, the sleeve is fixed by the hanging belt, then, the 200mm position of the outer wall of the end head of the installed pipeline 2 is uniformly coated with lubricant, meanwhile, the rubber ring in the sleeve 3 is uniformly coated with lubricant, then, the hanging belt wound on the outer ring of the sleeve 3 is connected with a crane hanging chain by using a 5t clamping ring, after the rubber ring is prevented from falling off, 4 lever blocks 5 are hung and buckled on a pull plate 6 of a hoop 4 on the installed pipeline 2, then, a locking device is hung on the sleeve 3, the installation position corresponds to the position of the lever blocks 5 one by one, the pull plate 6 is connected with the locking device by the lever blocks 5, and finally, the 4 lever blocks 5 are synchronously operated, and the sleeve 3 is pulled and buckled to the port design position of the installed pipeline 2, at the moment, the hoop 4 is reserved on the pipeline, and the subsequent pipeline is convenient to be pulled and installed;
the fourth step, pipeline installation, before pipeline installation, cleaning the joint of the sleeve 3 on the installed pipeline 2 and the pipeline 1 to be installed by utilizing an air compressor to ensure no sundries, hoisting and unloading the pipeline to a butt joint area, slowly falling the pipeline when the pipe heads of the installed pipeline 2 and the pipeline 1 to be installed are about 10cm apart, stopping falling hooks by a crane when the pipe heads are about 2-5 cm away from the ground, and stabilizing the installed pipeline 2 and the pipeline 1 to be installed, so as to prevent collision in the pipe head hoisting process and keep the pipeline in a ground-leaving state;
uniformly brushing lubricant on the outside of a joint of the pipeline 1 to be installed and the inside of a sleeve 3 of the installed pipeline 2, and then uniformly and correspondingly installing 4 lever blocks 5 on pull plates 6 of the anchor clamps 4 on the installed pipeline 2 and the pipeline 1 to be installed;
the heights of the installed pipeline 2 and the pipeline 1 to be installed are adjusted by pulling a chain block for hoisting, and the ports of the two pipelines are aligned;
The positions of the pipelines are finely adjusted by using jacks, steel plates are directly padded below the pipelines at the upper and lower positions of the pipelines, and pit digging is carried out at an angle of 45 degrees below the left and right positions of the pipelines to ensure that the axes and the heights of the installed pipelines 2 and the pipelines 1 to be installed are consistent;
after the pipeline 1 to be installed is stable, 4 operators synchronously operate the lever block 5, 1 observer in the pipeline detects the distance between the installed pipeline 2 and the installation port of the pipeline 1 to be installed in real time, and commands the 4 operators, the advancing speed and the distance of the monitoring pipeline are kept consistent until the end head of the pipeline 1 to be installed is inserted into the sleeve 3, and if the installation precision of the pipeline 1 to be installed does not meet the standard, the pipeline is required to be withdrawn;
The pipe backing is that a lifting rigging, a sling position arrangement and a hoop mounting position are consistent with those of pulling and closing mounting, a steel base support 11 is placed at a sleeve 3 of a pipe orifice of a pipe 16 to be backing, 4 jacks 10 are placed between a pulling plate 6 of a hoop 4 on the pipe 16 to be backing and the steel base support 11, a plurality of square timber 12 are placed between the sleeve 3 of the upper end of the installed pipe 2 and the hoop 4, the sleeve 3 is prevented from displacement in the pipe backing process, and the 4 jacks 10 are synchronously operated to push the pipe 16 to be backing out of the sleeve 3.
The steel collet 11 is of a hollow triangle structure and comprises a rectangular frame 13, triangular supporting frames 14 are fixedly arranged on two opposite frames on the rectangular frame 13, supporting plates 15 are fixedly arranged on the remaining two opposite frames of the rectangular frame 13, and the supporting plates 15 are fixedly connected with the triangular supporting frames 14.
And fifthly, backfilling the pipeline, stably placing the installed pipeline in the dug arc-shaped groove, rechecking the elevation of the top of the pipeline, and performing backfilling sand on the two sides of the bottom of the pipeline after the allowable error is within +/-1 cm so as to avoid the offset of the installed pipeline when the subsequent pipelines are in butt joint.
The pipe pulling-in and pipe pulling-out can be completed through the steps, and the pipe pulling-in and pipe pulling-out device is simple in structure, concise in installation steps and convenient to operate and apply.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (4)
1. A land installation method for oversized-diameter GRP pipelines is characterized by comprising the following specific installation steps:
firstly, manufacturing a hoop, and carrying out hoop processing according to a pipeline design drawing before construction;
Installing anchor clamps, namely respectively installing the anchor clamps at the ends of the adjacent ends of the installed pipeline and the pipeline to be installed, wherein a plurality of pulling plates are uniformly arranged on the outer sides of the anchor clamps;
the third step, the sleeve is installed, the lever blocks are hung and buckled on the pulling plate of the anchor ear on the installed pipeline, the locking device is hung on the sleeve, the installation positions correspond to the positions of the lever blocks one by one, and the pulling plate and the locking device are connected through the lever blocks;
The fourth step of pipeline installation, namely correspondingly installing a lever hoist on the installed pipeline and a pulling plate of an anchor ear on the pipeline to be installed, ensuring that the axes and heights of the installed pipeline and the pipeline to be installed are consistent, synchronously operating a plurality of lever hoists to enable the end head of the pipeline to be installed to be inserted into a sleeve, monitoring the advancing speed and the distance of the pipeline to be installed to be consistent in the installation process, and if the installation precision of the pipeline to be installed does not meet the standard, carrying out pipeline withdrawal, namely putting a steel collet piece at the sleeve of the pipe orifice of the pipeline to be withdrawn, putting a plurality of jacks between the pulling plate of the anchor ear on the pipeline to be withdrawn and the steel collet piece, putting a plurality of square woods between the sleeve of the upper end head of the pipeline to be withdrawn and the anchor ear, preventing the sleeve from displacement in the pipe withdrawal process, synchronously operating the jacks, and ejecting the pipeline to be withdrawn into the sleeve;
and fifthly, backfilling the pipeline, placing the installed pipeline in the dug arc-shaped groove, rechecking the elevation of the top of the pipeline, and performing backfilling sand on the two sides of the bottom of the pipeline after reaching the allowable error so as to avoid the offset of the installed pipeline caused by the butt joint of the subsequent pipelines.
2. The method for land installation of oversized GRP pipe of claim 1 wherein the steel shoe is of a hollow triangular structure comprising a rectangular frame, triangular support frames are fixedly arranged on two opposite frames on the rectangular frame, support plates are fixedly arranged on the remaining two opposite frames of the rectangular frame, and the support plates are fixedly connected with the triangular support frames at the same time.
3. The method for land installation of oversized GRP pipeline according to claim 1, wherein in the second step, the number of anchor ear is 4, two ends of anchor ear are respectively provided with bolt holes, anchor ear is fixedly connected by bolts, when the anchor ear is installed, three anchor ear pieces of 4 anchor ear are connected by bolts to form 3/4 circular arc, the anchor ear is sleeved on the end of pipeline, then the 4 th anchor ear is inserted and connected to the original 3/4 circular arc by the end of pipeline, and finally the anchor ear is fixed at 70 cm-90 cm distance from the end of pipeline by using bolts for connection.
4. The method for land installation of oversized GRP pipe of claim 1 wherein in said second step, rubber gaskets are fixedly disposed on the inner sides of said anchor ears, and said pull plates are provided with connecting holes for cooperating with lever blocks.
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| CN202011607912.7A CN112628465B (en) | 2020-12-29 | 2020-12-29 | A method for onshore installation of ultra-large diameter GRP pipes |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011607912.7A CN112628465B (en) | 2020-12-29 | 2020-12-29 | A method for onshore installation of ultra-large diameter GRP pipes |
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| CN112628465B true CN112628465B (en) | 2025-01-21 |
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| CN117345944A (en) * | 2023-08-30 | 2024-01-05 | 中国化学工程第十四建设有限公司 | Embedded installation process of large-diameter PCCP pipes on complex foundations |
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| CN214305566U (en) * | 2020-12-29 | 2021-09-28 | 中交一航局第三工程有限公司 | Overland installation and construction system for super-large-diameter GRP pipeline |
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| JP5959400B2 (en) * | 2012-10-15 | 2016-08-02 | 大阪市 | Seismic improvement method for fluid piping system and separation prevention device used therefor |
| CN103541365B (en) * | 2013-10-31 | 2015-08-19 | 北京工业大学 | A kind of hood type segmented head for base pit engineering inner support and construction method thereof |
| CN206128255U (en) * | 2016-09-19 | 2017-04-26 | 中交一航局第三工程有限公司 | Underwater mating manages auxiliary device |
| US10414004B1 (en) * | 2016-11-15 | 2019-09-17 | Mathey Investments, Inc. | Pipe alignment system |
| CN109185558B (en) * | 2018-08-15 | 2020-09-01 | 中交一航局第三工程有限公司 | Method for underwater installation of large-diameter GRP pipeline |
| CN210372496U (en) * | 2019-05-07 | 2020-04-21 | 江苏兄弟管业制造有限公司 | Sleeve type corrugated pipe compensator |
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