CN109555125A - Submersible type concreting sealing telescopic pipe - Google Patents
Submersible type concreting sealing telescopic pipe Download PDFInfo
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- CN109555125A CN109555125A CN201910068140.5A CN201910068140A CN109555125A CN 109555125 A CN109555125 A CN 109555125A CN 201910068140 A CN201910068140 A CN 201910068140A CN 109555125 A CN109555125 A CN 109555125A
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- sealing
- conduit
- section
- connection mechanism
- pipe fitting
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
The present invention relates to a kind of building filling pile construction equipment, specifically a kind of submersible type concreting sealing telescopic pipe.The problems such as existing generally existing construction efficiency of concrete pouring operation mode is low, and construction quality and safety are difficult to control.Technical solution of the present invention, which is set with by more piece conduit and is mounted, constitutes telescopic catheter main body, and minor details conduit lower end connects sealing of hole tube body, is connected by sealing connection mechanism between each section conduit；Sealing connection mechanism is equipped with guiding locking section, and guiding locking section inner wall is equipped with flute profile cavity, intracavitary that sealed bladder is housed；Sealing connection mechanism outer wall is equipped with the hanging detent cooperated with hanging device fixture and promotes detent.Disclosure is particularly well suited to carry out concrete underwater grouting operation, by sealing connection mechanism fast sealing, locking catheter main body in work progress, and conduit is promoted and pours operation without interrupting, and simplifies workflow, it saves manually, construction quality and working efficiency greatly improved.
Description
Technical field
The present invention relates to a kind of building filling pile construction equipment, specifically a kind of submersible type concreting sealing is stretched
The draw.
Background technique
Currently, the form of construction work of cast-in-place concrete pile utilizes concrete gravity to flow into stake bottom along expects pipe mostly, it is bottom-up
Complete perfusion operation.In practice of construction, especially for the underwater casting of concrete, there are construction efficiency for above-mentioned operation mode
Low, construction quality and safe the problems such as being difficult to control, specific manifestation is as follows:
1, expects pipe is made of more piece using threaded connection, and it is 60m that entire length, which is usually not less than, since bored concrete pile is bottom-up
It constructs, after concrete-pile, which pours, to be reach a certain height, needs Suspend Job, promote expects pipe and unload positioned at top most
Upper section tube body, then proceedes to pour, and entire work progress needs repeatedly pause, disassembly single-unit tube body, and working efficiency is lower, applies
Work is at high cost；
2, expects pipe disassembly is mostly manual operation, needs multi agent cooperation disassembly expects pipe, removes the single-unit expects pipe removed and is fixed surplus
Remaining body portion, process is tedious, and the time for causing single to interrupt is longer, and casting process need to be repeatedly interrupted, to a certain degree
Upper influence construction quality；
3, it due to there being mud in hole for grout pile, needs to carry out using O-shaped washer between existing each material-saving pipe of perfusion equipment close
Envelope processing, the structure keep the attended operation between expects pipe time-consuming and laborious, large labor intensity, and Rig up error once occur, stake holes
Inside interior slurry compounding expects pipe, then leads to concrete disintegration plugging, perfusion operation failure or broken pile, great economy is caused to damage
It loses；
4, the operating point of expects pipe disassembly operation is located at the port top of stake holes, it is easy to worker occurs and slip to crash into the great of stake holes
Accident, there are biggish security risks.
Further, since the slump by concrete is influenced, expects pipe clogging easily occurs, leads to perfusion failure, causes
Biggish economic loss, and slump is larger will affect construction quality, operation process control difficulty is big.
Summary of the invention
In view of the above problems, the present invention provides a kind of submersible type concreting sealing telescopic pipe, using Multi-section retractable
Tubing cooperates rapid sealing mechanism composition, overcomes the defect of the prior art, simplifies working procedure, and perfusion is greatly shortened and makees
Industry duration, reduces construction cost.
The purpose of the present invention is achieved through the following technical solutions:
A kind of submersible type concreting sealing telescopic pipe: including conduit, successively be assembled into can for socket from up to down for more piece conduit
Flexible expects pipe main body, each diameter for saving conduit are sequentially increased；
It further include sealing connection mechanism, sealing of hole tube body；It is connected between each conduit by sealing connection mechanism；
The sealing connection mechanism includes top pipe fitting, lower part pipe fitting and sealed bladder；Sealing connection mechanism upper section is lock
Guiding locking section that is tight and preventing working condition feeder pipe main body from rocking and bouncing back；The inner wall of the guiding locking section is equipped with section
Flute profile cavity annular in shape；Top pipe fitting is removably linked and packed at flute profile cavity with lower part pipe fitting；It is tightly connected
The lower part pipe fitting lower section of mechanism is internally provided with a limit chuck；
The sealed bladder cross section in a ring, and is equipped with air inlet-outlet pipe and gas nozzle；Sealed bladder is assemblied in the slot of guiding locking section
It describes intracavitary；
The connection structure for two section conduits being connected are as follows: above save the annular convex platform that conduit lower end is equipped with a limit and guiding, sealing
Top pipe fitting, lower part pipe fitting and the sealed bladder of bindiny mechanism are sleeved on outside a section conduit；Sealing connection mechanism lower part
The annular convex platform of the limit chuck of pipe fitting and upper section conduit mounts；The lower port of lower part pipe fitting and lower section conduit upper port can
The connection of disassembly；
The upper end of the sealing of hole tube body is removably connect with the lower end of section conduit is most descended, and the lower end port of sealing of hole tube body passes through bullet
Spring card is equipped with an end cover；
The sealing connection mechanism outer wall is equipped with from top to bottom to be hung with what the hanging fixture and lifting dogs of hanging device cooperated
Hang tag position and promotion detent.
Preferably, the sealed bladder includes cyst wall and outer cyst wall in the tubular of annular seal head, elastic material, interior cyst wall and
Outer cyst wall mutual sheathing and inside and outside cyst wall both ends are connected and fixed with annular seal head, formed cross section for annular and with sealed connection
The column structure that the flute profile cavity of mechanism matches；The air inlet-outlet pipe is arranged in annular seal head upper end.
Preferably, the upper tube upper end of joint edge of the sealing connection mechanism designs for chamfering structure.
Preferably, the lower part pipe fitting lower port outer diameter of the sealing connection mechanism is identical as lower section catheter outer diameter, or under
Portion's pipe fitting is connected smoothly with lower section conduit.
Preferably, the upper tube upper end of joint of the sealing connection mechanism is equipped with a hidden groove, the intake and exhaust of sealed bladder
Pipe free end is located in the groove.
Preferably, the end cover is steel material, and sealing ring is equipped between end cover and sealing of hole tube body lower port.
Preferably, wedge shaped design is received in the lower port edge of the sealing of hole tube body.
Preferably, the outer diameter of the sealing of hole tube body is identical as section catheter outer diameter is most descended.
The beneficial effects of the present invention are:
The present invention provides a kind of telescopic concreting sealing ducts, solve pouring construction efficiency in the prior art
Low, construction quality is impacted and is difficult to the problems such as control, and technical solution of the present invention carries out coagulation using telescopic expects pipe main body
Native pouring construction, each save is connected between conduit by sealing connection mechanism, and expects pipe main body is equipped with the sealing for temporary sealing
Bindiny mechanism and lower end end cap, the structure can realize fast sealing and the locking of tube body, and when ensuring concrete underwater grouting
Conduit connection sealing.Compared with existing form of construction work, operation is poured without dismantling expects pipe section by section using the present apparatus, is reduced
Labor intensity, entire work progress only need a people can be completed, and are greatly saved manually, and eliminate accident potential；It poured
Cheng Zhongke carries out conduit contraction according to condition of construction, pours without interrupting, has significantly simplified workflow, convenient and efficient, realizes
It works continuously, improves construction quality.
Catheter surface of the present invention is smooth, and conduit connection and sealing of hole tube end portion are all made of chamfering or wedge shape smooth transition,
It effectively avoids the objects such as reinforcing bar cage body in conduit and stake to mount, and after sealing connection mechanism locking, can prevent conduit from contacting steel
The phenomenon that barriers such as muscle cage retraction or bending are rocked；In addition, diameter increases expects pipe main body section by section from up to down, coagulation is prevented
Native plugging phenomenon.
Technical solution of the present invention is described in detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of sealing connection mechanism of the present invention；
Fig. 3 is the structural schematic diagram of sealing of hole tube body of the present invention；
Fig. 4 is the structural schematic diagram of sealed bladder of the present invention.
Specific embodiment
In figure: 1, end cover, 2, sealing of hole tube body, 3, sealing connection mechanism, 3a, top pipe fitting, 3b, lower tube connect
3d, head, 3c, hanging detent promote detent, 3e, flute profile cavity, 4, sealed bladder, 4a, interior cyst wall, 4b, outer cyst wall, 4c, annular envelope
Head, 5, air inlet-outlet pipe, 6, conduit, 6a, annular convex platform, 7, pump line.
Embodiment
From FIG. 1 to FIG. 4 it is found that technical solution of the present invention includes conduit 6, sealing connection mechanism 3, sealing of hole tube body 2；More piece is led
Successively socket is assembled into telescopic expects pipe main body to pipe 6 from up to down, and each diameter for saving conduit 6 is sequentially increased from up to down, should
Structure design can effectively avoid concrete obstruction conduit in filling process；Pass through sealing connection mechanism 3 between each conduit 6
Connection.
The sealing connection mechanism 3 includes top pipe fitting 3a, lower part pipe fitting 3b and sealed bladder 4；Sealed connection machine
The upper section of structure 3 is guiding locking section, and the inner wall of the guiding locking section is equipped with the flute profile cavity 3e of indent and cross section；On
Portion pipe fitting 3a and lower part pipe fitting 3b is removably linked and packed at flute profile cavity 3e by screw thread；Sealing connection mechanism
Lower part pipe fitting 3b lower section is internally provided with the limit chuck of an annular；4 cross section of sealed bladder in a ring, and be equipped with into
Exhaust pipe 5 and gas nozzle；Sealed bladder 4 is assemblied in the flute profile cavity 3e of guiding locking section.
The two section conduits 6 connection end structure being connected are as follows: above save conduit lower end and be equipped with a limit and and sealing connection mechanism
Limit the annular convex platform 6a of chuck cooperation；Top pipe fitting 3a, the lower part pipe fitting 3b and sealed bladder 4 of sealing connection mechanism are set with
It outside upper section conduit 6, and is slidably matched with catheter wall, in two section conduit telescopic process, is formed by upper and lower part pipe fitting
Guiding locking section can play the role of preventing rocking between tube body and being oriented to；The limiting card of sealing connection mechanism lower part pipe fitting 3b
The annular convex platform 6a of platform and upper section conduit is mounted；The lower port of lower part pipe fitting 3b and the lower section conduit upper port of same diameter pass through
Screw thread removably connects.In 6 telescopic process of conduit, the annular convex platform 6a outer rim around catheter port is sliding along lower section pipe inner wall
It is dynamic to play guiding role.
The upper end of the sealing of hole tube body 2 is removably connect with the lower end of section conduit 6 is most descended by screw thread, it is easy to disassemble more
It changes；End cover 1 is mounted on the lower end port of sealing of hole tube body 2 by a built-in Spring Card；The lower port edge of sealing of hole tube body 2
It is interior to receive wedge shaped necking design, guiding role is played when can touch obstacle in expects pipe main body telescopic process；The sealing of hole tube body 2
Outer diameter it is identical as 6 outer diameter of section conduit is most descended, with ensure connect after tube surfaces it is smooth.
The end cover 1 is steel material, is equipped with sealing ring between 2 lower port of end cover 1 and sealing of hole tube body.
3 outer wall of sealing connection mechanism is equipped with from top to bottom to be cooperated with the hanging fixture and lifting dogs of hanging device
Hanging detent 3c and promoted detent 3d.
As a preferred embodiment, the sealed bladder 4 include annular seal head 4c, elastic material tubular in cyst wall 4a and
Outer cyst wall 4b, interior cyst wall 4a and outer cyst wall 4b mutual sheathing and inside and outside cyst wall both ends are connected and fixed with annular seal head 4c form one
Cross section is column structure that is annular and matching with the flute profile cavity of sealing connection mechanism；The air inlet-outlet pipe 5 is arranged
In the upper end annular seal head 4c.
In the telescopic process for the conduit being connected, positioned at the annular seal head 4c of 4 upper and lower ends of sealed bladder, guiding can be played
And the effect of support, to protect utricule.
Under working condition, it is filled with gas (or liquid) in sealed bladder 4, makes interior cyst wall 4a and outer cyst wall 4b to inside and outside expansion,
The flute profile cavity 3e inner wall for pressing 6 outer wall of conduit and sealing connection mechanism respectively, makes to realize between two section conduits 6 being connected close
It seals and locks, to prevent mud etc. from entering in expects pipe main body, while also can avoid expects pipe main body due to vibration in filling process
The lateral twisting of generation.When another advantage of the structure is that conduit decentralization process middle tube body contacts the obstacles such as steel reinforcement cage, pipe is prevented
It is stuck that body bounces back or rock deformation.
Preferably, the top pipe fitting 3a upper end-face edge of the sealing connection mechanism designs for chamfering structure；It is close
The lower part lower end the pipe fitting 3b outer diameter for sealing bindiny mechanism identical with next 6 outer diameter of section conduit (or lower part pipe fitting 3b and next section
The junction of conduit 6 seamlessly transits)；In the top upper end pipe fitting 3a of sealing connection mechanism, one hidden groove, sealing are set
The air inlet-outlet pipe 5 of capsule is stretched out by the groove, and air inlet-outlet pipe free end and gas nozzle are hidden in groove, to ensure expects pipe main body
Tube surfaces are smooth after being linked and packed, and prevent from hooking during tube body flexible (lifting) with objects such as concrete reinforcing cages.
Illustrate underwater grouting work progress of the invention by taking casting concrete bored concrete pile as an example below:
Hanging device for operation to be perfused is equipped with a lifting dogs and multiple hanging fixtures；
A, multiple hanging fixtures of hanging device hanging card with each sealing connection mechanism of expects pipe main body of the present invention respectively is utilized
Position clamping makes each section conduit mutual sheathing and is suspended in right above stake holes (or construction point)；By the pump line of perfusion equipment with it is most upper
First segment conduit (i.e. the conduit of the innermost layer) socket connection at end；First segment conduit upper end can by sealing connection mechanism with hang
The tool that hangs tag is engaged by clamping and (can also according to circumstances cooperate in the fixture that detent and hanging device is arranged in the catheter tube end)；
B, the sealing connection mechanism for most descending section conduit since connection, successively release is clamped the hanging card of each sealing connection mechanism
Tool, and by the lifting dogs of hanging device, it is from bottom to top transferred section by section from most descending section conduit, under the lower end for making sealing of hole tube body
Row is to stake holes bottom, i.e. the present embodiment initial position for pouring operation；
C, before each sealing connection mechanism enters mud (or water), sealing connection mechanism, which is inflated, or injects liquid makes its expansion,
It realizes conduit connection sealing, and locks the 2-section pipe body being connected；
Expects pipe main body enters the increase after mud (or water) with depth, and the end cover of sealing of hole bottom of the pipe is at mud (or water)
Pressure act on lower automatic impaction nozzle, prevent mud (or water) from entering expects pipe main body, realize preferable sealing process；
D, the concrete pump for starting perfusion equipment starts to pour operation, concrete is injected conduit by pump line, when falling into conduit
When the weight concrete of bottom is greater than end cover Spring Card coupling mechanism force and the pressure of mud (or water), the end cover of steel is de-
It falls and is left to stake holes bottom；
E, as concrete surface rises, starting hanging device lifts by crane the conduit of the top using lifting dogs, when connecting two sections
The sealing connection mechanism of conduit exposes mud (or water surface), and the sealed bladder of sealing connection mechanism is emptied, and makes close between two conduits
Envelope and latch-release；
F, after upper section conduit rises completely, i.e., the section conduit rises to initial position, again using in hanging device with the section
The conduit is suspended in highest point by the corresponding hanging fixture of conduit；
G, the lifting dogs of hanging device are back to bottom, are ready for the promotion of next section conduit；
H, above-mentioned e~g step is repeated, until completing concreting.
Finally it should be noted that: above embodiments are affiliated for illustrating technical solution of the present invention rather than its limitations
The technical staff in field modifies to embodiment or some technical features can be equivalently replaced, without departing from skill of the present invention
The essence of art scheme should all cover within scope of the present invention.
Claims (8)
1. a kind of submersible type concreting sealing telescopic pipe, including conduit, successively socket is assembled into more piece conduit from up to down
Telescopic expects pipe main body, each diameter for saving conduit are sequentially increased；
It is characterized by also including sealing connection mechanisms, sealing of hole tube body；It is connected between each conduit by sealing connection mechanism；
The sealing connection mechanism includes top pipe fitting, lower part pipe fitting and sealed bladder；Sealing connection mechanism upper section is lock
Guiding locking section that is tight and preventing working condition feeder pipe main body from rocking and bouncing back；The inner wall of the guiding locking section is equipped with section
Flute profile cavity annular in shape；Top pipe fitting is removably linked and packed at flute profile cavity with lower part pipe fitting；It is tightly connected
The lower part pipe fitting lower section of mechanism is internally provided with a limit chuck；
The sealed bladder cross section in a ring, and is equipped with air inlet-outlet pipe and gas nozzle；Sealed bladder is assemblied in the slot of guiding locking section
It describes intracavitary；
Two section conduit connection structures being connected are the annular convex platform that upper section conduit lower end is equipped with a limit and guiding, are tightly connected
Top pipe fitting, lower part pipe fitting and the sealed bladder of mechanism are sleeved on outside a section conduit；Sealing connection mechanism lower tube connects
The limit chuck of head and the annular convex platform of upper section conduit mount；The lower port of lower part pipe fitting and lower section conduit upper port are detachable
Connection；
The upper end of the sealing of hole tube body is removably connect with the lower end of section conduit is most descended, and the lower end port of sealing of hole tube body passes through bullet
Spring card is equipped with an end cover；
The sealing connection mechanism outer wall is equipped with from top to bottom to be hung with what the hanging fixture and lifting dogs of hanging device cooperated
Hang tag position and promotion detent.
2. a kind of submersible type concreting sealing telescopic pipe according to claim 1, it is characterised in that: the sealing
Capsule includes cyst wall and outer cyst wall in the tubular of annular seal head, elastic material, interior cyst wall and outer cyst wall mutual sheathing and inside and outside cyst wall
Both ends are connected and fixed with annular seal head, form the column that cross section is annular and matches with the flute profile cavity of sealing connection mechanism
Body structure；The air inlet-outlet pipe is arranged in annular seal head upper end.
3. a kind of submersible type concreting sealing telescopic pipe according to claim 1, it is characterised in that: the sealing connects
It is designed for chamfering structure at the upper tube upper end of joint edge of connection mechanism.
4. a kind of submersible type concreting sealing telescopic pipe according to claim 1, it is characterised in that: the sealing connects
The lower part pipe fitting lower port outer diameter of connection mechanism is identical as lower section catheter outer diameter or lower part pipe fitting is seamlessly transitted with lower section conduit
Connection.
5. a kind of submersible type concreting sealing telescopic pipe according to claim 1, it is characterised in that: the sealing connects
The upper tube upper end of joint of connection mechanism is equipped with a hidden groove, and the air inlet-outlet pipe free end of sealed bladder is located in the groove.
6. a kind of submersible type concreting sealing telescopic pipe according to claim 1, it is characterised in that: the sealing
End cap is steel material, and sealing ring is equipped between end cover and sealing of hole tube body lower port.
7. a kind of submersible type concreting sealing telescopic pipe according to claim 1, it is characterised in that: the hole sealing tube
Wedge shaped design is received in the lower port edge of body.
8. a kind of submersible type concreting sealing telescopic pipe according to claim 1, it is characterised in that: the hole sealing tube
The outer diameter of body is identical as section catheter outer diameter is most descended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910068140.5A CN109555125B (en) | 2019-01-24 | 2019-01-24 | Submersible concrete pouring sealing telescopic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910068140.5A CN109555125B (en) | 2019-01-24 | 2019-01-24 | Submersible concrete pouring sealing telescopic pipe |
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| Publication Number | Publication Date |
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| CN109555125A true CN109555125A (en) | 2019-04-02 |
| CN109555125B CN109555125B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910068140.5A Active CN109555125B (en) | 2019-01-24 | 2019-01-24 | Submersible concrete pouring sealing telescopic pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305193A (en) * | 2020-03-19 | 2020-06-19 | 张家口众益岩土工程有限公司 | Construction method for pouring concrete pile by using telescopic guide pipe |
| CN114687344A (en) * | 2020-12-25 | 2022-07-01 | 连云港华云桩业有限公司 | Seawater corrosion resistant internal clamping type mechanical locking device |
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| FR2061579A1 (en) * | 1969-08-22 | 1971-06-25 | Arlo Inc | |
| CN102047020A (en) * | 2007-12-14 | 2011-05-04 | A及S环保技术股份公司 | Coupling for interconnecting at least two pipes |
| CN102966094A (en) * | 2012-12-15 | 2013-03-13 | 马春根 | Method for constructing concrete pile through rotary excavating and pressure irrigation |
| CN204780931U (en) * | 2015-06-29 | 2015-11-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Marine grout leak protection structure |
| CN207934460U (en) * | 2018-03-09 | 2018-10-02 | 中交第三公路工程局有限公司 | A kind of automatic spraying apparatus of tunnel concrete |
| CN109083150A (en) * | 2018-08-07 | 2018-12-25 | 中国冶集团有限公司 | A kind of concrete telescoping catheter for doing operation based on wireless remote control type |
| CN209585049U (en) * | 2019-01-24 | 2019-11-05 | 张家口众益岩土工程有限公司 | Submersible type concreting sealing telescopic pipe |
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2019
- 2019-01-24 CN CN201910068140.5A patent/CN109555125B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2061579A1 (en) * | 1969-08-22 | 1971-06-25 | Arlo Inc | |
| CN102047020A (en) * | 2007-12-14 | 2011-05-04 | A及S环保技术股份公司 | Coupling for interconnecting at least two pipes |
| CN102966094A (en) * | 2012-12-15 | 2013-03-13 | 马春根 | Method for constructing concrete pile through rotary excavating and pressure irrigation |
| CN204780931U (en) * | 2015-06-29 | 2015-11-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Marine grout leak protection structure |
| CN207934460U (en) * | 2018-03-09 | 2018-10-02 | 中交第三公路工程局有限公司 | A kind of automatic spraying apparatus of tunnel concrete |
| CN109083150A (en) * | 2018-08-07 | 2018-12-25 | 中国冶集团有限公司 | A kind of concrete telescoping catheter for doing operation based on wireless remote control type |
| CN209585049U (en) * | 2019-01-24 | 2019-11-05 | 张家口众益岩土工程有限公司 | Submersible type concreting sealing telescopic pipe |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305193A (en) * | 2020-03-19 | 2020-06-19 | 张家口众益岩土工程有限公司 | Construction method for pouring concrete pile by using telescopic guide pipe |
| CN111305193B (en) * | 2020-03-19 | 2022-04-29 | 张家口众益岩土工程有限公司 | Construction method for pouring concrete pile by using telescopic guide pipe |
| CN114687344A (en) * | 2020-12-25 | 2022-07-01 | 连云港华云桩业有限公司 | Seawater corrosion resistant internal clamping type mechanical locking device |
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| Publication number | Publication date |
|---|---|
| CN109555125B (en) | 2024-02-27 |
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