CN113356186B - Bottom sealing construction process of offshore wind power implanted steel pipe pile - Google Patents
Bottom sealing construction process of offshore wind power implanted steel pipe pile Download PDFInfo
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- CN113356186B CN113356186B CN202110713720.2A CN202110713720A CN113356186B CN 113356186 B CN113356186 B CN 113356186B CN 202110713720 A CN202110713720 A CN 202110713720A CN 113356186 B CN113356186 B CN 113356186B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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Abstract
The invention discloses a bottom sealing construction process of an offshore wind power implanted steel pipe pile, which comprises the following steps that a bottom sealing device is installed in the steel pipe pile, and the bottom sealing device comprises a bottom sealing plate and a bottom cover plate; the sealing bottom plate is welded on the lower part of the inner wall of the steel pipe pile, and a through hole is formed in the center of the sealing bottom plate and a sleeve is welded; a guide piece with a hanging hole is welded in the middle of the top surface of the bottom cover plate, a fixed rope loop penetrates through the hanging hole, and the bottom cover plate is arranged below the sleeve through a plurality of limiting steel bars; transporting the steel pipe pile to a construction site, penetrating a tightening rope in a fixed rope loop of the bottom cover plate, and leading two ends of the tightening rope to the top of the steel pipe pile for fixing; step three, drilling a rock embedding hole; inserting the steel pipe pile into the rock-socketed hole; step five, tightly stressing the tightening rope belt to enable the bottom cover plate to seal the lower opening of the sleeve; grouting an annulus; step seven, after the grouting material reaches initial setting, the tightening rope is recovered. The invention can directly carry out the empty grouting of the outer ring of the pile after the pile is planted.
Description
Technical Field
The invention relates to a bottom sealing construction process of an offshore wind power implanted steel pipe pile.
Background
The current construction process of the implanted steel pipe pile comprises the following steps: firstly, building a construction platform, driving a steel casing into the construction platform, then, putting a drilling machine into the drilling machine to drill a hole after the casing is stabilized, after the hole is drilled to the designed pile bottom elevation, implanting a steel pipe pile into the hole and fixing the steel pipe pile, pouring a section of pile core concrete at the bottom of the steel pipe pile through underwater bottom sealing concrete, and pouring a gap between the outer wall of the steel pipe pile and the rock-socketed hole wall into underwater non-dispersive grouting material (side wall grouting) through an underwater grouting process so as to bond the steel pipe pile and the bedrock to form permanent connection.
In the construction process, the grouting pipe 20 needs to be arranged on the inner wall of the steel pipe pile 100, and after the steel pipe pile 100 is inserted into the rock embedding hole 200, the bottom sealing concrete 10 (see fig. 1) with the height of 1m needs to be poured at the bottom of the steel pipe pile 100 through the grouting pipe 20, so that a mixer ship needs to be positioned beside a machine position for pouring. In order to prevent concrete segregation, concrete conduits need to be placed in the piles for concrete pouring. After pouring is finished, the initial setting time of the bottom sealing concrete is about 12 hours, and after the initial setting is finished, side wall grouting is carried out.
The construction process needs 4 hours for putting down the concrete conduit, takes 6 hours for positioning, anchoring and pouring of the mixing ship, and takes 22 hours for waiting for initial setting of the bottom sealing concrete, wherein the time for waiting for initial setting of the bottom sealing concrete is 12 hours. The construction process increases the workload of the on-site stirring ship and the anchor boat, can not fully utilize the ship, has more construction total cost time, and can increase the risk of hole collapse of the side wall due to overlong side wall grouting waiting time.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a bottom sealing construction process of an offshore wind power implanted steel pipe pile.
The purpose of the invention is realized as follows: a bottom sealing construction process of an offshore wind power implanted steel pipe pile comprises the following steps:
firstly, manufacturing a steel pipe pile by rolling a steel plate, and then installing a bottom sealing device in the steel pipe pile, wherein the bottom sealing device comprises a bottom sealing plate and a bottom cover plate; the sealing bottom plate is welded on the lower part of the inner wall of the steel pipe pile, a through hole is formed in the center of the sealing bottom plate, a sleeve with the inner diameter being the same as the diameter of the through hole is welded on the position, corresponding to the through hole, of the bottom surface of the sealing bottom plate, and a rubber ring is installed on the inner wall of the sleeve through an adhesive; the diameter of the bottom cover plate is larger than the outer diameter of the sleeve, a guide piece with a lifting hole is welded in the middle of the top surface of the bottom cover plate, a fixed rope loop penetrates through the lifting hole, and the bottom cover plate is coaxially arranged below the sleeve through a plurality of limiting steel bars; each limiting steel bar is provided with a vertical part and a transverse part to be in an inverted L shape, the length of the vertical part of each limiting steel bar is larger than that of the sleeve, the vertical part of each limiting steel bar is inserted into the inner hole of the rubber ring, the transverse parts of the limiting steel bars are lapped on the top surface of the sealing bottom plate, and the lower ends of the vertical parts of the limiting steel bars are uniformly welded on the top surface of the bottom cover plate along the periphery of the guide piece; a plurality of grout inlet holes are uniformly distributed along the side wall of the steel pipe pile at the same height position below the bottom sealing plate; a plurality of grouting openings are formed in the steel pipe pile above the sealing bottom plate, and a plurality of grouting pipelines which are communicated with the grouting openings one by one are arranged in the steel pipe pile;
transporting the steel pipe pile to a construction site by a transport ship, penetrating a tightening rope in a fixed rope ring on a bottom cover plate, and leading two ends of the tightening rope to the top of the steel pipe pile from an inner hole of a rubber ring for fixing;
step three, firstly, erecting a rock-socketed construction platform at the pile position, then hoisting a drilling machine to the rock-socketed construction platform, then completing the construction of a rock-socketed hole by using the drilling machine, and then removing the drilling machine;
hoisting the steel pipe pile by using a crane ship and vertically inserting the steel pipe pile into the rock-socketed hole until the steel pipe pile is inserted to the hole bottom of the rock-socketed hole;
step five, tightly stressing the tightening rope belt to enable the bottom cover plate to close and seal the lower opening of the sleeve on the bottom sealing plate;
grouting an annular space of a rock embedding section between the steel pipe pile and the rock embedding hole and an annular space of a soil layer between the steel pipe pile and the soil layer above the rock stratum through a grouting pipe arranged in the steel pipe pile, and pouring grouting materials into the steel pipe pile below the sealing bottom plate through a grouting hole at the lower part of the steel pipe pile until the annular space of the rock embedding section and the annular space of the soil layer below the sealing bottom plate are filled with grouting materials;
and step seven, after the grouting material reaches initial setting, recovering the tightening rope.
In the bottom sealing construction process of the offshore wind power implanted steel pipe pile, a plurality of external reinforcing rib plates connected with the inner wall of the steel pipe pile are uniformly distributed on the edge of the top surface of the bottom sealing plate; and a plurality of inner reinforcing rib plates connected with the bottom surface of the bottom sealing plate are uniformly distributed on the outer wall of the sleeve.
The bottom sealing construction process of the offshore wind power implanted steel pipe pile comprises the following steps that the guide piece is composed of three right-angle triangular plates, one right-angle side of each of the three right-angle triangular plates is welded together to form Y-shaped arrangement, the other right-angle sides of the three right-angle triangular plates are welded on the top surface of the bottom cover plate, and a lifting hole is formed in the upper portion of each right-angle triangular plate.
The bottom sealing construction process of the offshore wind power implanted steel pipe pile comprises the following steps of setting a guide frame on a rock-socketed construction platform, enabling the center of the guide frame and the center of a rock-socketed hole to be on the same vertical line, inserting the steel pipe pile into the rock-socketed hole by aligning the center of the guide frame with the center of the steel pipe pile by using a crane ship until the steel pipe pile is inserted into the bottom of the rock-socketed hole, straightening the steel pipe pile by using four groups of jacks on the guide frame and the rock-socketed construction platform, and temporarily fixing the steel pipe pile by using a limiting frame after straightening.
According to the bottom sealing construction process of the offshore wind power implanted steel pipe pile, the aperture of the rock-socketed hole is 300 +/-50 mm larger than the diameter of the steel pipe pile, and the depth of the rock-socketed hole is 2-5 times of the pile diameter below the medium-weathered rock surface.
The bottom sealing construction process of the offshore wind power implanted steel pipe pile has the following characteristics:
1) according to the invention, the bottom sealing device is arranged in the pile, so that bottom sealing concrete which needs to be poured in the pile after pile planting is replaced, the bottom sealing plate of the bottom sealing device is sealed with the bottom cover plate, so that the effect of isolating the inside and the outside of the pile is achieved, grouting can be directly carried out in the annular space outside the pile, the installed bottom sealing device is prefabricated in advance, ship-machine matching and construction time for pouring the bottom sealing concrete in the pile are saved, grouting operation between the outer wall of the pile and a rock embedding hole can be directly carried out after pile planting is finished, the time for waiting for initial setting of the bottom sealing concrete is saved, and the construction continuity of the pile planting and pile outer ring control grouting operation is ensured;
2) the bottom sealing device has a simple structure, can be installed in the pile manufacturing process in advance, is integrally hoisted when an engineering pile is planted, and tightly seals the through hole of the bottom sealing plate by tightening the bottom cover plate through the tightening rope after the pile is planted, so that the operation is simple, and the diving team cost and the construction time of the underwater switch valve are saved;
3) from the aspect of quality control, the waiting process of long-time bottom sealing concrete initial setting is avoided, and the risk of side wall hole collapse is effectively reduced.
Drawings
Fig. 1 is an axial sectional view of a back cover structure of an implanted steel pipe pile of the prior art;
FIG. 2 is a perspective view of the back cover device of the present invention;
FIG. 3 is an axial cross-sectional view of the back cover device of the present invention;
FIG. 4 is a perspective view of a bottom closure plate in the bottoming device of the present invention;
FIG. 4a is an axial cross-sectional view of the bottom closure plate in the bottom closure assembly of the present invention;
FIG. 5 is a perspective view of the bottom cover plate in the back cover device of the present invention;
FIG. 5a is a top view of the bottom cover plate in the bottom sealing device of the present invention;
FIG. 6 is a diagram illustrating the bottom sealing process of the present invention in step five.
Detailed Description
The invention will be further explained with reference to the drawings.
The invention discloses a bottom sealing construction process of an offshore wind power implanted steel pipe pile, which comprises the following steps of:
firstly, manufacturing a steel pipe pile, namely manufacturing the steel pipe pile 100 by rolling a steel plate, and then installing a bottom sealing device in the steel pipe pile 100, wherein the bottom sealing device comprises a bottom sealing plate 1 and a bottom cover plate 2; the sealing bottom plate 1 is welded on the lower part of the inner wall of the steel pipe pile 100 and is 0.5mm away from the pile bottom, six outer reinforcing rib plates 11 connected with the inner wall of the steel pipe pile 100 are uniformly arranged on the edge of the top surface of the bottom sealing plate 1, the sealing bottom plate 1 is made of a steel plate with the thickness of 20mm, a through hole with the diameter of phi 0.7m is formed in the center of the sealing bottom plate 1, a sleeve 12 is welded on the position, corresponding to the through hole, of the bottom surface of the sealing bottom plate 1, the inner diameter of the sleeve 12 is the same as the diameter of the through hole, the wall thickness of the sleeve 12 is 20mm, the height of the sleeve is 0.1m, six inner reinforcing rib plates 13 connected with the bottom surface of the sealing bottom plate 1 are uniformly arranged on the outer wall of the sleeve 12, and a rubber ring 14 is arranged on the inner wall of the sleeve 12 through an adhesive; the bottom cover plate 2 is a steel plate with the thickness of 5mm, and the diameter of the bottom cover plate 2 is larger than that of the through hole of the bottom sealing plate 1, namely phi is 0.8 m; a guide piece 21 with a hoisting hole is welded in the middle of the top surface of the bottom cover plate 2, the guide piece 21 is composed of three right-angle triangular plates, one right-angle side with the length of 0.2m of the three right-angle triangular plates is welded together and arranged in a Y shape, the other right-angle side with the length of 0.34m of the three right-angle triangular plates is welded on the top surface of the bottom cover plate 2, the upper part of each right-angle triangular plate is respectively provided with a hoisting hole 210 with the diameter of phi 40mm, and a fixed rope loop 22 is penetrated in the hoisting hole 210; the bottom cover plate 2 is coaxially arranged below the sleeve 12 through four limiting steel bars 23; each limiting steel bar 23 is provided with a vertical part and a transverse part and is in an inverted L shape, the length of the vertical part of each limiting steel bar 23 is 0.45m, the length of the transverse part is 0.2m, the diameter of each limiting steel bar 23 is phi 20mm, the vertical part of each limiting steel bar 23 is inserted into the inner hole of the rubber ring 14, so that the transverse parts of the four limiting steel bars 23 are lapped on the top surface of the bottom sealing plate 1, and the lower ends of the vertical parts of the four limiting steel bars 23 are uniformly welded on the top surface of the bottom cover plate 2 along the periphery of the guide piece 21; a plurality of grout inlet holes 101 are uniformly distributed on the wall surface of the steel pipe pile 100 at a position 0.25m away from the pile bottom (see fig. 2 to 5 a); a plurality of grouting openings are formed above a sealing bottom plate 1 in the steel pipe pile 100, a plurality of grouting pipelines are prefabricated in the steel pipe pile 100 and are communicated with the grouting openings in a one-to-one correspondence manner;
secondly, the steel pipe pile is transported to a construction site by a transport ship, a tightening rope 3 penetrates through a fixed rope ring 22 of a bottom cover plate 2 of the bottom sealing device, and two ends of the tightening rope 3 are led to the top of the steel pipe pile 100 from an inner hole of a rubber ring 14 to be fixed;
step three, firstly erecting a rock-socketed construction platform at the pile position, then hoisting a drilling machine to the rock-socketed construction platform, then completing the construction of a rock-socketed hole by using the drilling machine, wherein the hole diameter of the rock-socketed hole is 300 +/-50 mm larger than the diameter of the steel pipe pile, the depth of the rock-socketed hole is 2-5 times of the pile diameter below a medium weathered rock surface, and then removing the drilling machine;
step four, arranging a guide frame on the rock-socketed construction platform, enabling the center of the guide frame and the center of the rock-socketed hole to be on the same vertical line, inserting the steel pipe pile into the rock-socketed hole by aligning the center of the guide frame with a crane ship until the steel pipe pile is inserted to the bottom of the rock-socketed hole, straightening the steel pipe pile by utilizing four sets of jacks on the guide frame and the rock-socketed construction platform, and temporarily fixing the steel pipe pile by utilizing a limiting frame after straightening; because the through holes are formed in the sealing bottom plate, the bottom cover plate does not seal the through holes of the sealing bottom plate through the four limiting reinforcing steel bars, and water can flow into the steel pipe pile through the through holes of the sealing bottom plate in the pile planting process, so that the steel pipe pile can sink smoothly;
step five, tightening the tightening rope 3 by using a 5t chain block to apply force, so that the bottom cover plate 2 closes and seals the lower opening of the sleeve 12 on the bottom seal plate 1; the bottom cover plate 2 is not biased by the guide 21 and remains coaxial with the sleeve 12 (see fig. 6);
grouting an annular space of a rock embedding section between the steel pipe pile and the rock embedding hole and an annular space of a soil layer between the steel pipe pile and the soil layer above the rock stratum through a grouting pipe arranged in the steel pipe pile, and pouring grouting materials into the steel pipe pile below the sealing bottom plate through a grouting hole at the lower part of the steel pipe pile until the annular space of the rock embedding section and the annular space of the soil layer below the sealing bottom plate are filled with grouting materials;
and step seven, after the grouting material reaches initial setting, the tightening rope is recovered, and the fixed rope ring is not recovered and is used as a disposable consumable.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (5)
1. A bottom sealing construction process of an offshore wind power implanted steel pipe pile is characterized by comprising the following steps:
firstly, manufacturing a steel pipe pile by rolling a steel plate, and then installing a bottom sealing device in the steel pipe pile, wherein the bottom sealing device comprises a bottom sealing plate and a bottom cover plate; the sealing bottom plate is welded on the lower part of the inner wall of the steel pipe pile, a through hole is formed in the center of the sealing bottom plate, a sleeve with the inner diameter being the same as the diameter of the through hole is welded on the position, corresponding to the through hole, of the bottom surface of the sealing bottom plate, and a rubber ring is installed on the inner wall of the sleeve through an adhesive; the diameter of the bottom cover plate is larger than the outer diameter of the sleeve, a guide piece with a hanging hole is welded in the middle of the top surface of the bottom cover plate, a fixed rope ring penetrates through the hanging hole, and the bottom cover plate is coaxially arranged below the sleeve through a plurality of limiting steel bars; each limiting steel bar is provided with a vertical part and a transverse part and is in an inverted L shape, the length of the vertical part of each limiting steel bar is greater than that of the sleeve, the vertical part of each limiting steel bar is inserted into the inner hole of the rubber ring, so that the transverse parts of the limiting steel bars are lapped on the top surface of the sealing bottom plate, and the lower ends of the vertical parts of the limiting steel bars are uniformly welded on the top surface of the bottom cover plate along the periphery of the guide piece; a plurality of slurry inlet holes are uniformly distributed along the side wall of the steel pipe pile at the same height position below the sealing bottom plate; a plurality of grouting openings are formed in the steel pipe pile above the sealing bottom plate, and a plurality of grouting pipelines which are communicated with the grouting openings one by one are arranged in the steel pipe pile;
transporting the steel pipe pile to a construction site by a transport ship, penetrating a tightening rope in a fixed rope ring on a bottom cover plate, and leading two ends of the tightening rope to the top of the steel pipe pile from an inner hole of a rubber ring for fixing;
step three, firstly, erecting a rock-socketed construction platform at the pile position, then hoisting a drilling machine to the rock-socketed construction platform, completing the construction of a rock-socketed hole by using the drilling machine, and then removing the drilling machine;
hoisting the steel pipe pile by using a crane ship and vertically inserting the steel pipe pile into the rock-socketed hole until the steel pipe pile is inserted into the hole bottom of the rock-socketed hole;
step five, tightly stressing the tightening rope belt to enable the bottom cover plate to close and seal the lower opening of the sleeve on the bottom sealing plate;
grouting an embedded rock section annular space between the steel pipe pile and the rock embedding hole and a soil layer annular space between the steel pipe pile and a soil layer above a rock stratum through grouting pipelines arranged in the steel pipe pile, and pouring grouting materials in the steel pipe pile below the sealing bottom plate through a grouting hole in the lower part of the steel pipe pile until the steel pipe pile, the embedded rock section annular space and the soil layer annular space below the sealing bottom plate are filled with grouting materials;
and step seven, after the grouting material reaches initial setting, recovering the tightening rope.
2. The bottom sealing construction process of the offshore wind power implanted steel pipe pile according to claim 1, wherein a plurality of external reinforcing rib plates connected with the inner wall of the steel pipe pile are uniformly arranged on the edge of the top surface of the bottom sealing plate; and a plurality of inner reinforcing rib plates connected with the bottom surface of the sealing bottom plate are uniformly distributed on the outer wall of the sleeve.
3. The bottom sealing construction process of the offshore wind power implanted steel pipe pile according to claim 1, wherein the guide piece is composed of three right-angled triangular plates, one right-angled side of each of the three right-angled triangular plates is welded together to form a Y-shaped arrangement, the other right-angled side of each of the three right-angled triangular plates is welded on the top surface of the bottom cover plate, and a lifting hole is formed in the upper portion of each right-angled triangular plate.
4. The bottom sealing construction process of the offshore wind power implanted steel pipe pile according to claim 1, wherein in the fourth step, a guide frame is arranged on the rock-socketed construction platform, the center of the guide frame and the center of the rock-socketed hole are on the same vertical line, a crane ship is used for inserting the steel pipe pile into the rock-socketed hole by aligning the center of the guide frame with the center of the steel pipe pile until the steel pipe pile is inserted to the bottom of the rock-socketed hole, then four sets of jacks on the guide frame and the rock-socketed construction platform are used for straightening the steel pipe pile, and after the straightening, the steel pipe pile is temporarily fixed by using a limiting frame.
5. The bottom sealing construction process of the offshore wind power implanted steel pipe pile according to claim 1, wherein the diameter of the rock-socketed hole is 300 +/-50 mm larger than the diameter of the steel pipe pile, and the depth of the rock-socketed hole is 2-5 times the pile diameter below a medium-weathered rock surface.
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| CN202110713720.2A CN113356186B (en) | 2021-06-25 | 2021-06-25 | Bottom sealing construction process of offshore wind power implanted steel pipe pile |
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| CN202110713720.2A CN113356186B (en) | 2021-06-25 | 2021-06-25 | Bottom sealing construction process of offshore wind power implanted steel pipe pile |
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| CN113356186B true CN113356186B (en) | 2022-07-15 |
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| CH651340A5 (en) * | 1982-12-06 | 1985-09-13 | Claudio Guandalini | DEVICE AND PROCEDURE FOR PILEING LANDS REALIZING REINFORCED CONCRETE POLES WITHOUT COATING. |
| CN108643218A (en) * | 2018-05-29 | 2018-10-12 | 中国电建集团华东勘测设计研究院有限公司 | A kind of pillar and pile connecting structure suitable for taper pile |
| CN210315612U (en) * | 2019-08-02 | 2020-04-14 | 中铁十一局集团第五工程有限公司 | Pull-up type quick bottom sealing structure for through hole of hanging box and pile |
| CN111593728A (en) * | 2020-06-05 | 2020-08-28 | 中交第三航务工程局有限公司 | Embedded rock-socketed pile 'pile-first method' interpolation type jacket foundation construction system |
| CN111827293A (en) * | 2020-06-23 | 2020-10-27 | 中国五冶集团有限公司 | Underwater concrete pouring device and method in steel pipe |
| CN212612487U (en) * | 2020-06-05 | 2021-02-26 | 中交上海港湾工程设计研究院有限公司 | Pile-first interpolation type jacket grouting plugging system |
| CN112900479A (en) * | 2021-01-27 | 2021-06-04 | 中交第三航务工程局有限公司宁波分公司 | Construction method of implanted single-pile foundation of ocean tidal current energy generator set |
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2021
- 2021-06-25 CN CN202110713720.2A patent/CN113356186B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH651340A5 (en) * | 1982-12-06 | 1985-09-13 | Claudio Guandalini | DEVICE AND PROCEDURE FOR PILEING LANDS REALIZING REINFORCED CONCRETE POLES WITHOUT COATING. |
| CN108643218A (en) * | 2018-05-29 | 2018-10-12 | 中国电建集团华东勘测设计研究院有限公司 | A kind of pillar and pile connecting structure suitable for taper pile |
| CN210315612U (en) * | 2019-08-02 | 2020-04-14 | 中铁十一局集团第五工程有限公司 | Pull-up type quick bottom sealing structure for through hole of hanging box and pile |
| CN111593728A (en) * | 2020-06-05 | 2020-08-28 | 中交第三航务工程局有限公司 | Embedded rock-socketed pile 'pile-first method' interpolation type jacket foundation construction system |
| CN212612487U (en) * | 2020-06-05 | 2021-02-26 | 中交上海港湾工程设计研究院有限公司 | Pile-first interpolation type jacket grouting plugging system |
| CN111827293A (en) * | 2020-06-23 | 2020-10-27 | 中国五冶集团有限公司 | Underwater concrete pouring device and method in steel pipe |
| CN112900479A (en) * | 2021-01-27 | 2021-06-04 | 中交第三航务工程局有限公司宁波分公司 | Construction method of implanted single-pile foundation of ocean tidal current energy generator set |
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| CN113356186A (en) | 2021-09-07 |
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Address after: 200032 No. 139, Xuhui District, Shanghai, Pingjiang Road Patentee after: CCCC THIRD HARBOR ENGINEERING Co.,Ltd. Patentee after: CCCC Third Aviation Bureau Sixth Engineering (Xiamen) Co., Ltd. Patentee after: XIAMEN BRANCH OF CCCC THIRD HARBOR ENGINEERING Co.,Ltd. Address before: 200032 No. 139, Xuhui District, Shanghai, Pingjiang Road Patentee before: CCCC THIRD HARBOR ENGINEERING Co.,Ltd. Patentee before: CCCC Sanya (Xiamen) Engineering Co.,Ltd. Patentee before: XIAMEN BRANCH OF CCCC THIRD HARBOR ENGINEERING Co.,Ltd. |