CN116497818B - Offshore large-diameter steel pipe pile anti-slip pile device and application method thereof - Google Patents
Offshore large-diameter steel pipe pile anti-slip pile device and application method thereof Download PDFInfo
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- CN116497818B CN116497818B CN202310787097.4A CN202310787097A CN116497818B CN 116497818 B CN116497818 B CN 116497818B CN 202310787097 A CN202310787097 A CN 202310787097A CN 116497818 B CN116497818 B CN 116497818B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 125
- 239000010959 steel Substances 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 238000005192 partition Methods 0.000 claims abstract description 21
- 230000009471 action Effects 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/18—Placing by vibrating
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
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- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Revetment (AREA)
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Abstract
The invention discloses an offshore large-diameter steel pipe pile anti-slip pile device and a use method thereof, wherein the offshore large-diameter steel pipe pile anti-slip pile device comprises a lower outer sleeve, a middle partition plate, an upper cylinder, a locking mechanism and a self-adaptive closing valve; the lower outer sleeve is used for being sleeved on a steel pipe pile to be constructed, and the middle partition plate is arranged at the top of the lower outer sleeve, so that a closed space effect is formed inside the steel pipe pile; the upper cylinder is used for installing a vibro-hammer device; the locking mechanism is arranged on the lower outer sleeve and is used for fixing the anti-slip pile device on the steel pipe pile; the middle partition plate is provided with a water permeable channel communicated with the outside, and the self-adaptive closed valve is arranged in the water permeable channel and can adaptively control the conduction state of the water permeable channel according to the sinking state of the steel pipe pile. When the steel pipe pile slides, the water flow speed of the steel pipe pile outer row is greatly increased, the conical valve core is pushed to overcome the resistance of the reset spring to close the opening of the conical wall under the action of the continuous and rapid outer row water flow, so that the water pressure in the steel pipe pile is increased, and the slide pile is effectively prevented.
Description
Technical Field
The invention belongs to the technical field of pile foundation construction of ocean engineering, and particularly relates to an offshore large-diameter steel pipe pile anti-slip pile device and a use method thereof.
Background
The construction of pile foundations is not carried out by ocean resource exploitation and development equipment from a port and a dock in a shallow water area, a bridge, an offshore wind power plant, an ocean jacket platform in a deep water area and the like. The steel pipe pile can bear intermittent hammering impulsive force of a pile hammer, pile foundation bearing capacity is large, design flexibility is large, the length of the steel pile is convenient to lengthen or cut off and other adjustment, the steel pile is widely applied to marine structure pile foundation construction, and for steel pile drivability, an open steel pile is easier to drive into a soil layer than a closed steel pile. The offshore piling process is easily influenced by wind resistance, water flow, rock and soil properties and the like and is limited by environmental conditions, so that the dangerous factors of piling are increased, and the difficulty is more obvious. Meanwhile, with the continuous improvement of the world material and equipment manufacturing capacity, the size of the steel pile is greatly changed, the diameter of the pile body is increased, and the depth of the driven soil is increased, so that the pile driving scheme of the steel pile in the pile driving process is required to be subjected to safety protection design to ensure the pile driving safety.
The large-diameter ultra-long steel pile can generate an emergency in the continuous piling process, namely the steel pile suddenly and automatically sinks to a certain depth in the intermittent of a certain hammering or two hammering, and the automatic sinking state of the steel pile is called a sliding column in construction. The swift current stake is a dangerous phenomenon in the pile construction, and the emergence of swift current stake influences the efficiency of pile, and swift current stake speed can cause the damage to stake and steel pile, increases the cost of piling, leads to the pile foundation to be used even, needs to trade the stake or trade the pile region. Pile slipping can also result in incorrect assessment of pile foundation bearing capacity after pile driving.
In order to solve the problem of pile sliding of a large-diameter steel pipe pile, the current prior art mainly increases a current limiting plate at a pile opening, and changes the water flow of a water permeable hole on the current limiting plate so as to slow down the penetrating speed during pile sliding.
Disclosure of Invention
The invention aims at overcoming the technical defects in the prior art and provides an offshore large-diameter steel pipe pile anti-slip pile device and a use method thereof.
The technical scheme adopted for realizing the purpose of the invention is as follows:
an offshore large-diameter steel pipe pile anti-slip pile device comprises a lower outer sleeve, a middle partition plate, an upper cylinder, a locking mechanism and a self-adaptive closing valve;
the lower outer sleeve is used for being sleeved on a steel pipe pile to be constructed, the middle partition plate is arranged at the top of the lower outer sleeve, and the top of the lower outer sleeve is closed; the upper cylinder is arranged at the upper part of the middle partition plate and is used for installing a damper device;
the locking mechanism is arranged on the outer sleeve at the lower part and is used for fixing the anti-slip pile device on a steel pipe pile to be constructed;
the middle partition plate is provided with a water permeable channel communicated with the outside, and the self-adaptive closed valve is arranged in the water permeable channel and can adaptively control the conduction state of the water permeable channel according to the sinking state of the steel pipe pile;
the self-adaptive closed valve comprises a valve wall, a conical valve core, a reset spring and a supporting plate, wherein the conical valve core, the reset spring and the supporting plate are arranged in the valve wall, the front end of the valve wall is an open conical wall, the rear end of the valve wall is a cylindrical wall, the supporting plate is fixedly connected to the cylindrical wall of the valve wall, the conical valve core is arranged on the supporting plate through the reset spring, and the reset spring is in a separation state with the opening of the conical valve core and the opening of the conical wall in a natural state.
In the above technical solution, the number of the locking mechanisms is preferably 6-12, and the locking mechanisms are uniformly distributed on the lower outer sleeve in circumference.
In the technical scheme, the lower outer sleeve comprises an upper equal-diameter cylinder section and a lower divergent cylinder section, a rubber sealing ring is arranged on the inner wall of the upper equal-diameter cylinder section, and the locking mechanism is arranged on the inner side of the lower divergent cylinder section.
In the technical scheme, the locking mechanism comprises a triangular jacking block and a hydraulic rod, the tail part of the hydraulic rod is hinged to the lower gradually-expanding cylinder section, the front part of the hydraulic rod is hinged to the jacking block, the jacking block is driven by the hydraulic rod to enter an included angle between the steel pipe pile and the lower gradually-expanding cylinder section, and the lower outer sleeve is fixed with the steel pipe pile.
In the technical scheme, the lower divergent cylinder section is provided with the mounting hole for mounting the hydraulic rod.
In the technical scheme, a circle of ladder structure is arranged at the edge of the bottom surface of the middle partition plate, and a water permeable channel is transversely formed in the ladder structure.
In the above technical scheme, the number of the water permeable channels is a plurality of, and the water permeable channels are uniformly distributed on the middle partition plate in circumference.
The use method of the offshore large-diameter steel pipe pile anti-slip pile device comprises the following steps:
step 1: sleeving the lower outer sleeve of the offshore large-diameter steel pipe pile anti-slip pile device on the upper port of the steel pipe pile, then starting a locking mechanism, and fixing the offshore large-diameter steel pipe pile anti-slip pile device with the steel pipe pile;
step 2: installing a damper device on the upper cylinder of the offshore large-diameter steel pipe pile anti-slip pile device, and filling water into the steel pipe pile through a water permeable channel and a self-adaptive closed valve;
step 3: starting a vibro-hammer device to carry out vibro-sinking on the steel pipe pile, wherein when the steel pipe pile is sunk at a normal speed in the vibro-sinking process of the steel pipe pile, water in the steel pipe pile can be discharged through a self-adaptive closed valve and a water permeable channel; when the steel pipe pile slides, the water pressure in the steel pipe pile suddenly increases, the water flow speed of the outer row is greatly increased, the conical valve core is pushed to overcome the resistance of the return spring to close the opening of the conical wall under the action of the continuous and rapid water flow of the outer row, so that the water pressure in the steel pipe pile is increased, and the slide pile is effectively prevented;
step 4: after the steel pipe pile is vibrated and sunk to a specified depth position, the locking mechanism is controlled to unlock, and then the offshore large-diameter steel pipe pile anti-slip pile device and the vibration hammer device are lifted up together through the pull rope.
Compared with the prior art, the invention has the beneficial effects that:
the anti-slip pile device is simple in structure, does not need a complex detection and control system, and can adaptively control the conduction state of the water permeable channel according to the sinking state of the steel pipe pile by arranging the water permeable channel communicated with the outside on the middle partition plate and arranging the self-adaptive closing valve in the water permeable channel; in the vibration sinking process of the steel pipe pile, when the steel pipe pile is sunk at a normal speed, water in the steel pipe pile can be discharged through the self-adaptive closed valve and the water permeable channel; when the steel pipe pile slides, the water pressure in the steel pipe pile suddenly increases, the water flow speed of the outer row greatly increases, the conical valve core of the self-adaptive closed valve is pushed under the action of the continuous and rapid outer row water flow to overcome the resistance of the reset spring to close the opening of the conical wall, so that the water pressure in the steel pipe pile increases, and the slide pile is effectively prevented.
Drawings
Fig. 1 is a schematic structural view of an offshore large-diameter steel pipe pile anti-slip pile device according to the present invention.
Fig. 2 is an enlarged partial schematic view of the locking mechanism of the present invention.
FIG. 3 is a schematic diagram of the natural state of the self-adaptive closed valve according to the present invention.
Fig. 4 is a schematic diagram of the self-adaptive closing valve in the closed state after being pushed by water flow.
Other relevant drawings may be made by those of ordinary skill in the art from the above figures without undue burden.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1-3, the offshore large-diameter steel pipe pile anti-slip pile device comprises a lower outer sleeve 1, an intermediate baffle plate 2, an upper cylinder 3, a locking mechanism 4 and an adaptive closing valve 5.
The lower outer sleeve 1 is used for being sleeved on a steel pipe pile 6 to be constructed, the middle baffle plate 2 is arranged at the top of the lower outer sleeve 1, the top of the lower outer sleeve 1 is closed, the upper cylinder 3 is arranged at the upper part of the middle baffle plate 2, the caliber of the upper cylinder 3 is consistent with that of the steel pipe pile 6 to be constructed, and when the anti-slip pile device is in operation, the upper port of the upper cylinder 3 is used for installing a vibration hammer device (in the prior art, the vibration hammer device is installed at the upper port of the steel pipe pile 6 and directly generates vibration sinking force on the steel pipe pile 6), so that the vibration sinking force generated by the vibration hammer device can be transmitted to the steel pipe pile 6 through the anti-slip pile device.
The locking mechanisms 4 are arranged on the lower outer sleeve 1 and used for fixing the anti-slip pile device on the steel pipe piles 6 to be constructed, the number of the locking mechanisms 4 is preferably 6-12, and the locking mechanisms are circumferentially and uniformly distributed on the lower outer sleeve 1. Specifically, the lower outer sleeve 1 comprises an upper equal-diameter cylindrical section 1.1 and a lower gradually-expanding cylindrical section 1.2, a rubber sealing ring 9 is arranged on the inner wall of the upper equal-diameter cylindrical section 1.1 so as to increase the sealing effect between the lower outer sleeve 1 and the steel pipe pile 6 and enable the inside of the steel pipe pile 6 to form a closed space effect, the locking mechanism 4 is arranged on the inner side of the lower gradually-expanding cylindrical section 1.2 and comprises a triangular jacking block 4.1 and a hydraulic rod 4.2, the tail part of the hydraulic rod 4.2 is hinged to the lower gradually-expanding cylindrical section 1.2, the front part of the hydraulic rod 4.2 is hinged to the bottom of the jacking block 4.1, and then the hydraulic rod 4.2 drives the jacking block 4.1 to enter an included angle between the steel pipe pile 6 and the lower gradually-expanding cylindrical section 1.2, so that the lower outer sleeve 1 and the steel pipe pile 6 are fixed. Further, a mounting hole 1.21 for mounting the hydraulic rod 4.2 is formed in the lower diverging cylinder section 1.2.
The middle partition plate 2 is provided with a water permeable channel 7 communicated with the outside, in this embodiment, the water permeable channel 7 is arranged along the radial direction of the middle partition plate 2, in order to facilitate the radial direction of the middle partition plate 2 to be provided with the water permeable channel 7, the edge of the bottom surface of the middle partition plate 2 is provided with a circle of step structure 8, the circle of step structure 8 is propped against the upper port of the steel pipe pile 6, and the water permeable channel 7 is transversely arranged on the step structure 8. After the lower outer sleeve 1 is fixedly sleeved at the upper port of the steel pipe pile 6, the inside and the outside of the steel pipe pile 6 are communicated through the water permeable channel 7. Further, the number of the water permeable channels 7 is more than one, preferably 5-8, and the water permeable channels are uniformly distributed on the middle partition plate 2 in a circumference manner.
The self-adaptive closing valve 5 is arranged in the water permeable channel 7, and can adaptively control the conduction state of the water permeable channel 7 according to the sinking state of the steel pipe pile. Specifically, referring to fig. 3, the self-adaptive closing valve 5 includes a valve wall 5.1, a conical valve core 5.2 installed inside the valve wall 5.1, a return spring 5.3, and a supporting plate 5.4, wherein the front end of the valve wall 5.1 is an open conical wall 5.11, the rear end is a cylindrical wall 5.12, the supporting plate 5.4 is a rectangular plate and is fixedly connected to the cylindrical wall 5.12 of the valve wall 5.1, the conical valve core 5.2 is installed on the supporting plate 5.4 through the return spring 5.3, the return spring 5.3 is in a separated state between the conical valve core 5.2 and the opening of the conical wall 5.11 in a natural state, and in this state, water can pass through the self-adaptive closing valve 5 and the water permeable channel 7. Further, the tapered valve element 5.2 is provided in a tapered direction along the water permeable passage 7 from inside to outside.
The working principle of the self-adaptive closing valve 5 is as follows: after the anti-slip pile device is installed, when the steel pipe pile 6 is submerged at a normal speed in the vibration and sinking process, water in the steel pipe pile 6 can be discharged at a low speed through the self-adaptive closed valve 5 and the water permeable channel 7; when a pile sliding occurs in the steel pipe pile, the water pressure in the steel pipe pile 6 is suddenly increased, the water flow speed of the outer row is greatly increased, the conical valve core 5.2 is pushed to overcome the resistance of the return spring 5.3 under the action of the continuous and rapid outer row water flow to close the opening (the state shown in the attached figure 4) of the conical wall 5.11, so that the self-adaptive closing valve 5 and the water permeable channel 7 are effectively closed, the water pressure in the steel pipe pile 6 is increased, the resistance at the top end of the pile is increased, and the pile sliding is effectively prevented.
The use method of the offshore large-diameter steel pipe pile anti-slip pile device comprises the following steps:
step 1: the lower outer sleeve 1 of the offshore large-diameter steel pipe pile anti-slip pile device is sleeved on the upper port of the steel pipe pile 6, then the locking mechanism 4 is started, and the offshore large-diameter steel pipe pile anti-slip pile device is fixed with the steel pipe pile 6.
Step 2: a damper device is arranged on an upper cylinder body 3 of the offshore large-diameter steel pipe pile anti-slip pile device, and water is filled into a steel pipe pile 6 through a water permeable channel 7 and a self-adaptive closed valve 5.
Step 3: starting a vibration hammer device to enable the steel pipe pile 6 to vibrate and sink, and discharging water in the steel pipe pile 6 at a low speed through the self-adaptive closed valve 5 and the water permeable channel 7 when the steel pipe pile 6 is sunk at a normal speed in the vibration and sinking process of the steel pipe pile 6; when a pile sliding occurs in the steel pipe pile, the water pressure in the steel pipe pile 6 is suddenly increased, the water flow speed of the outer row is greatly increased, the conical valve core 5.2 is pushed to overcome the resistance of the return spring 5.3 under the action of the continuous and rapid outer row water flow to close the opening of the conical wall 5.11, so that the self-adaptive closing valve 5 and the water permeable channel 7 are effectively closed, the water pressure in the steel pipe pile 6 is increased, the resistance at the top end of the pile is increased, and the pile sliding is effectively prevented.
Step 4: after the steel pipe pile 6 is vibrated and sunk to a specified depth position, the locking mechanism 4 is controlled to unlock, and then the offshore large-diameter steel pipe pile anti-slip pile device and the vibrating hammer device are lifted up together through the pull rope, so that recycling is realized.
The foregoing has described exemplary embodiments of the invention, it being understood that any simple variations, modifications, or other equivalent arrangements which would not unduly obscure the invention may be made by those skilled in the art without departing from the spirit of the invention.
Claims (8)
1. The utility model provides a swift current stake device is prevented to marine major diameter steel-pipe pile which characterized in that: comprises a lower outer sleeve, a middle partition plate, an upper cylinder, a locking mechanism and a self-adaptive closing valve;
the lower outer sleeve is used for being sleeved on a steel pipe pile to be constructed, the middle partition plate is arranged at the top of the lower outer sleeve, and the top of the lower outer sleeve is closed; the upper cylinder is arranged at the upper part of the middle partition plate and is used for installing a damper device;
the locking mechanism is arranged on the outer sleeve at the lower part and is used for fixing the anti-slip pile device on a steel pipe pile to be constructed;
the middle partition plate is provided with a water permeable channel communicated with the outside, and the self-adaptive closed valve is arranged in the water permeable channel and can adaptively control the conduction state of the water permeable channel according to the sinking state of the steel pipe pile;
the self-adaptive closed valve comprises a valve wall, a conical valve core, a reset spring and a supporting plate, wherein the conical valve core, the reset spring and the supporting plate are arranged in the valve wall, the front end of the valve wall is an open conical wall, the rear end of the valve wall is a cylindrical wall, the supporting plate is fixedly connected to the cylindrical wall of the valve wall, the conical valve core is arranged on the supporting plate through the reset spring, and the reset spring is in a separation state between the conical valve core and the opening of the conical wall in a natural state;
in the vibration sinking process of the steel pipe pile, when the steel pipe pile is sunk at a normal speed, water in the steel pipe pile can be discharged through the self-adaptive closed valve and the water permeable channel; when the steel pipe pile slides, the water pressure in the steel pipe pile is increased, the conical valve core of the self-adaptive closing valve is pushed to overcome the resistance of the reset spring to close the opening of the conical wall under the action of continuous and rapid water flow, so that the water pressure in the steel pipe pile is increased, and the slide pile is effectively prevented.
2. The offshore large-diameter steel pipe pile anti-slip pile device according to claim 1, wherein: the number of the locking mechanisms is 6-12, and the locking mechanisms are uniformly distributed on the lower outer sleeve in a circumference manner.
3. The offshore large-diameter steel pipe pile anti-slip pile device according to claim 1, wherein: the lower outer sleeve comprises an upper equal-diameter cylinder section and a lower divergent cylinder section, a rubber sealing ring is arranged on the inner wall of the upper equal-diameter cylinder section, and the locking mechanism is arranged on the inner side of the lower divergent cylinder section.
4. The offshore large-diameter steel pipe pile anti-slip pile device according to claim 3, wherein: the locking mechanism comprises a triangular propping block and a hydraulic rod, the tail part of the hydraulic rod is hinged to the lower gradually-expanding cylinder section, the front part of the hydraulic rod is hinged to the propping block, the propping block is driven by the hydraulic rod to enter the included angle between the steel pipe pile and the lower gradually-expanding cylinder section, and the lower outer sleeve is fixed with the steel pipe pile.
5. The offshore large-diameter steel pipe pile anti-slip pile device according to claim 4, wherein: and the lower divergent cylinder section is provided with a mounting hole for mounting the hydraulic rod.
6. The offshore large-diameter steel pipe pile anti-slip pile device according to claim 1, wherein: a circle of ladder structure is arranged at the edge of the bottom surface of the middle partition plate, and a water permeable channel is transversely arranged on the ladder structure.
7. The offshore large-diameter steel pipe pile anti-slip pile device according to claim 6, wherein: the number of the permeable channels is multiple, and the permeable channels are uniformly distributed on the middle partition plate in a circumference manner.
8. The use method of the offshore large-diameter steel pipe pile anti-slip pile device according to claim 1, wherein the use method comprises the following steps:
step 1: sleeving the lower outer sleeve of the offshore large-diameter steel pipe pile anti-slip pile device on the upper port of the steel pipe pile, then starting a locking mechanism, and fixing the offshore large-diameter steel pipe pile anti-slip pile device with the steel pipe pile;
step 2: installing a damper device on the upper cylinder of the offshore large-diameter steel pipe pile anti-slip pile device, and filling water into the steel pipe pile through a water permeable channel and a self-adaptive closed valve;
step 3: starting a vibro-hammer device to carry out vibro-sinking on the steel pipe pile, wherein when the steel pipe pile is sunk at a normal speed in the vibro-sinking process of the steel pipe pile, water in the steel pipe pile can be discharged through a self-adaptive closed valve and a water permeable channel; when the steel pipe pile slides, the water pressure in the steel pipe pile suddenly increases, the water flow speed of the outer row is greatly increased, the conical valve core is pushed to overcome the resistance of the return spring to close the opening of the conical wall under the action of the continuous and rapid water flow of the outer row, so that the water pressure in the steel pipe pile is increased, and the slide pile is effectively prevented;
step 4: after the steel pipe pile is vibrated and sunk to a specified depth position, the locking mechanism is controlled to unlock, and then the offshore large-diameter steel pipe pile anti-slip pile device and the vibration hammer device are lifted up together through the pull rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310787097.4A CN116497818B (en) | 2023-06-30 | 2023-06-30 | Offshore large-diameter steel pipe pile anti-slip pile device and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310787097.4A CN116497818B (en) | 2023-06-30 | 2023-06-30 | Offshore large-diameter steel pipe pile anti-slip pile device and application method thereof |
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| CN116497818A CN116497818A (en) | 2023-07-28 |
| CN116497818B true CN116497818B (en) | 2023-12-01 |
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| CN117332638B (en) * | 2023-09-22 | 2024-04-09 | 中国能源建设集团广东省电力设计研究院有限公司 | Anti-slip steel pipe pile suitable for large megawatt offshore wind turbine and optimization method thereof |
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| JPH11217991A (en) * | 1998-02-02 | 1999-08-10 | Ktk Telecommunications Engineering Co Ltd | Drift excavation device |
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| CN203034455U (en) * | 2013-01-17 | 2013-07-03 | 中建海峡建设发展有限公司 | Hoop component for preventing tubular pile from slipping |
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| CN113863307A (en) * | 2021-09-15 | 2021-12-31 | 天津大学 | Position-adjustable pile slipping control device used in installation of ocean large-diameter tubular pile |
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