CN114657992B - Construction method for dredging in pile embedded in rock foundation - Google Patents
Construction method for dredging in pile embedded in rock foundation Download PDFInfo
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- CN114657992B CN114657992B CN202210218200.9A CN202210218200A CN114657992B CN 114657992 B CN114657992 B CN 114657992B CN 202210218200 A CN202210218200 A CN 202210218200A CN 114657992 B CN114657992 B CN 114657992B
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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
- E02D13/08—Removing obstacles
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- General Life Sciences & Earth Sciences (AREA)
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- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a construction method for dredging in a foundation pile implanted into a rock-socketed pile. The invention carries out dredging work in the steel pipe pile when grouting is carried out at the pile side, advances the working procedure and ensures the construction period; the mud in the pile hole is replaced in the grouting process, so that the dredging effect is achieved, the construction is simple and convenient, and the operation efficiency is improved; the whole slurry pumping construction process is carried out on a drilling platform, barge operation is not needed, the slurry pumping construction process is not influenced by sea conditions, the construction cost is greatly saved, and the construction difficulty and risk are reduced.
Description
Technical Field
The invention relates to the field of wind power and bridge construction, in particular to a construction method for dredging in a pile embedded with a rock foundation.
Background
Foundation drilling construction is needed in the construction process of the embedded rock foundation, mud in the drilling construction can form silt to be deposited in the steel pipe pile, and in-pile dredging is needed before the jacket is installed, so that the jacket leg inserting operation is not influenced.
The conventional construction method for dredging in the pile adopts a barge and mud sucking equipment to carry out dredging construction in the pile by combining underwater water injection of a diver after the pile planting of the main body steel pipe pile is completed and before the installation of a jacket, and the barge construction is greatly influenced by sea conditions and has uncontrollable operation time; the mud is usually hardened and compacted during the mud suction construction, and the mud suction construction efficiency is low; the safety risk of underwater water injection construction of divers is high. The scheme is unfavorable for the control of construction progress, cost and safety.
At present, the embedded rock foundation is the first world, and no reference construction experience exists, so that the characteristics of the embedded rock foundation construction are combined, and the in-pile dredging method with high operation efficiency, low construction cost and small safety risk is invented.
Disclosure of Invention
The invention aims to provide a construction method for dredging in a pile of an embedded rock foundation, which is characterized in that a slurry pumping system is arranged on a drilling platform, and slurry in a steel pipe pile is continuously replaced with seawater in the grouting process of the pile side to achieve the dredging purpose, so that the dredging efficiency on the sea can be effectively improved, and the construction period can be shortened; the marine ship machine equipment is reduced, and the construction cost is saved; and the construction difficulty and the construction safety risk are reduced.
The purpose of the invention is realized in the following way:
a construction method for dredging in an embedded rock foundation pile is characterized by comprising the following steps: the method comprises the following specific steps:
A. a set of slurry pumping system is arranged on the drilling construction platform, the slurry pumping system consists of an air compressor, a slurry pumping conduit and an air pipe, and the slurry pumping conduit is connected with the air compressor through the air pipe;
B. after the steel pipe pile is placed, the grouting guide pipe is lengthened section by section and placed into a pile hole of the steel pipe pile, and the distance between the bottom opening of the grouting guide pipe and the steel pipe pile sealing plate is controlled to be 200mm;
C. starting an air compressor, and pumping slurry in a pile hole of the steel pipe pile out of the pile hole of the steel pipe pile through a slurry pumping guide pipe until the slurry elevation in the pile hole of the steel pipe pile is 2m higher than the sea level elevation H1;
D. when the filling construction of the grouting material at the pile side is started, the elevation of the slurry in the pile hole is gradually increased, and when the elevation of the slurry is 10m higher than the sea level elevation, an air compressor is started to pump the slurry in the pile hole of the steel pipe pile away from the pile hole of the steel pipe pile until the elevation of the slurry in the pile hole of the steel pipe pile is 2m higher than the sea level elevation H1;
E. when the pile side grouting material elevation reaches the steel pile casing bottom elevation H2, a diving worker is arranged to cut a water inlet on the steel pile casing, so that seawater can enter the steel pile casing;
F. starting an air compressor to pump mud in the pile hole of the steel pipe pile, continuously pumping the mud in the pile hole of the steel pipe pile, continuously enabling seawater to enter the steel pile casing and the steel pipe pile through a water inlet on the steel pile casing, and gradually replacing the mud in the pile hole of the steel pipe pile with the seawater;
G. and stopping pumping the slurry and dredging the slurry when the slurry in the steel pipe pile is completely replaced by seawater.
The invention discloses a construction method for dredging in a foundation pile implanted into a rock-socketed pile. Compared with the prior art, the invention has the advantages that:
1. the invention sets the dredging work in the pile hole of the steel pipe pile at the grouting of the pile side, advances the working procedure and ensures the construction period;
2. the mud in the pile hole is replaced in the grouting process, so that the dredging effect is achieved, the construction is simple and convenient, and the operation efficiency is improved;
3. the whole slurry pumping construction process is carried out on a drilling platform, barge operation is not needed, the slurry pumping construction process is not influenced by sea conditions, the construction cost is greatly saved, and the construction difficulty and risk are reduced.
Drawings
Fig. 1 is a construction diagram of a dredging step A, B in a steel pipe pile;
fig. 2 is a construction diagram of a dredging step C, D in the steel pipe pile;
fig. 3 is a construction diagram of a dredging step E in the steel pipe pile;
fig. 4 is a construction diagram of a dredging step F, G in the steel pipe pile.
Detailed Description
The invention will be described in further detail with reference to the following drawings.
1-4, a construction method for dredging in a pile embedded in a rock foundation, which comprises the following specific steps:
A. a set of slurry pumping system is arranged on a drilling construction platform 1, the slurry pumping system consists of an air compressor 2, a slurry pumping conduit 3 and an air pipe 4, and the slurry pumping conduit 3 is connected with the air compressor 2 through the air pipe 4;
B. after the steel pipe pile 5 is placed, the grouting guide pipe 3 is lengthened section by section and placed into a pile hole of the steel pipe pile 5, and the distance between the bottom opening of the grouting guide pipe 3 and the steel pipe pile sealing plate 6 is controlled to be 200mm;
C. starting an air compressor 2, and pumping slurry 7 in a pile hole of the steel pipe pile 5 out of the pile hole of the steel pipe pile 5 through a slurry pumping guide pipe 3 until the elevation of the slurry 7 in the pile hole of the steel pipe pile 5 is 2m higher than the sea level elevation H1;
D. when filling construction of the grouting material 8 at the pile side is started, the elevation of the slurry 7 in the pile hole is gradually increased, and when the elevation of the slurry 7 is 10m higher than the sea level elevation, the air compressor 2 is started to pump the slurry 7 in the pile hole of the steel pipe pile 5 away from the pile hole of the steel pipe pile 5 until the elevation of the slurry 7 in the pile hole of the steel pipe pile 5 is 2m higher than the sea level elevation H1;
E. when the elevation of the grouting material 8 at the pile side reaches the elevation H2 at the bottom of the steel pile casing 9, a diving worker is arranged to cut a water inlet 10 on the steel pile casing 9, so that seawater can enter the steel pile casing 9;
F. starting the air compressor 2 to start pumping mud 7 in the pile hole of the steel pipe pile 5, continuously pumping the mud 7 in the pile hole of the steel pipe pile 5, continuously entering the steel pile casing 9 and the steel pipe pile 5 through a water inlet 10 on the steel pile casing 9, and gradually replacing the mud 7 in the pile hole of the steel pipe pile 5 with seawater;
G. when the mud 7 in the steel pipe pile 5 is replaced by seawater, the pumping is stopped, and dredging is completed.
The present invention is not limited to the above-mentioned preferred embodiments, and any person who can learn about the structural changes made under the teaching of the present invention can be within the scope of the present invention if the present invention has the same or similar technical solutions.
Claims (1)
1. A construction method for dredging in an embedded rock foundation pile is characterized by comprising the following steps: the method comprises the following specific steps:
A. a set of slurry pumping system is arranged on the drilling construction platform, the slurry pumping system consists of an air compressor, a slurry pumping conduit and an air pipe, and the slurry pumping conduit is connected with the air compressor through the air pipe;
B. after the steel pipe pile is placed, the grouting guide pipe is lengthened section by section and placed into a pile hole of the steel pipe pile, and the distance between the bottom opening of the grouting guide pipe and the steel pipe pile sealing plate is controlled to be 200mm;
C. starting an air compressor, and pumping slurry in a pile hole of the steel pipe pile out of the pile hole of the steel pipe pile through a slurry pumping guide pipe until the slurry elevation in the pile hole of the steel pipe pile is 2m higher than the sea level elevation H1;
D. when the filling construction of the grouting material at the pile side is started, the elevation of the slurry in the pile hole is gradually increased, and when the elevation of the slurry is 10m higher than the sea level elevation, an air compressor is started to pump the slurry in the pile hole of the steel pipe pile away from the pile hole of the steel pipe pile until the elevation of the slurry in the pile hole of the steel pipe pile is 2m higher than the sea level elevation H1;
E. when the pile side grouting material elevation reaches the steel pile casing bottom elevation H2, a diving worker is arranged to cut a water inlet on the steel pile casing, so that seawater can enter the steel pile casing;
F. starting an air compressor to pump mud in the pile hole of the steel pipe pile, continuously pumping the mud in the pile hole of the steel pipe pile, continuously enabling seawater to enter the steel pile casing and the steel pipe pile through a water inlet on the steel pile casing, and gradually replacing the mud in the pile hole of the steel pipe pile with the seawater;
G. and stopping pumping the slurry and dredging the slurry when the slurry in the steel pipe pile is completely replaced by seawater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210218200.9A CN114657992B (en) | 2022-03-08 | 2022-03-08 | Construction method for dredging in pile embedded in rock foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210218200.9A CN114657992B (en) | 2022-03-08 | 2022-03-08 | Construction method for dredging in pile embedded in rock foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114657992A CN114657992A (en) | 2022-06-24 |
| CN114657992B true CN114657992B (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210218200.9A Active CN114657992B (en) | 2022-03-08 | 2022-03-08 | Construction method for dredging in pile embedded in rock foundation |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3832857A (en) * | 1973-05-07 | 1974-09-03 | Nelson C Shields | Pressure grouting |
| CN110029684A (en) * | 2019-05-16 | 2019-07-19 | 中交港湾（上海）科技有限公司 | A kind of clear mud construction method of jacket basis circumferential weld and system |
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