CN-122013772-A - Method for pumping mud in ultra-deep offshore pile

CN122013772ACN 122013772 ACN122013772 ACN 122013772ACN-122013772-A

Abstract

The invention discloses a method for pumping mud in an ultra-deep offshore pile. The method comprises the steps of moving a crane ship to the vicinity of a foundation pile, moving and lowering a mud pumping device into the first foundation pile through the crane ship, rotationally scraping mud and stirring a bottom mud layer at the bottom of the foundation pile through a reamer of the mud pumping device, flushing out the bottom mud through high-pressure water, blowing mud slag to the top of the foundation pile through high-pressure water, pumping the mud slag to the crane ship, lifting and recycling the mud pumping device through the crane ship, moving the crane ship to a second foundation pile, moving and lowering the mud pumping device into the second foundation pile, pumping the mud slag in the second foundation pile into the first foundation pile, repeating the operations, sequentially completing mud pumping operation of the rest foundation piles, and backfilling the mud slag on the crane ship into the last foundation pile after the pile sinking operation of the last foundation pile is completed. The invention is applied to the technical field of offshore wind power jackets.

Inventors

YANG XUAN
CHEN YONGQING
HE SHAODONG
HAN TIANXING
HE HAIQUN
WANG YI
LIU YANGLIU
ZHANG HONGLI

Assignees

保利长大工程有限公司
保利长大港航工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260316

Claims (7)

1. The method for pumping mud in the ultra-deep offshore pile is characterized by comprising the following steps of: s1, moving a crane ship to the vicinity of a foundation pile; S2, moving and lowering the mud pumping equipment into the first foundation pile through the crane ship; S3, carrying out rotary mud scraping and bottom mud layer stirring on the bottom of the foundation pile through a reamer of mud pumping equipment, flushing out bottom mud through outputting high-pressure water, blowing mud to the top of the foundation pile through outputting high-pressure air, and pumping the mud to a crane ship; s4, lifting and recycling the mud pumping equipment through a crane ship to finish pile sinking construction of the first foundation pile; S5, moving the crane ship to a second foundation pile; S6, moving and lowering the mud pumping equipment into the second foundation pile, and pumping mud residue in the second foundation pile into the first foundation pile; s7, repeating the above operation, and sequentially completing the mud pumping operation of the residual foundation piles; and S8, after the pile sinking operation of the last foundation pile is completed, backfilling sludge on the crane ship into the last foundation pile.
2. The method for extracting mud from the ultra-deep offshore pile according to claim 1, wherein the mud extracting device comprises a pipe body, a driving mechanism and a plurality of reamers, the reamers are positioned at the lower end of the pipe body, the driving mechanism can drive the reamers to rotate, a high-pressure air pipe and a high-pressure water pipe are arranged on the pipe body, and a plurality of high-pressure air holes are arranged on the high-pressure air pipe.
3. The method for pumping mud in an ultra-deep offshore pile according to claim 2, wherein the driving mechanism comprises a plurality of hydraulic pipelines, the hydraulic pipelines are all located in the pipe body, one end of each hydraulic pipeline is connected with a hydraulic oil pump, the other end of each hydraulic pipeline is connected with a hydraulic motor, the hydraulic motor can drive the reamer to rotate, the high-pressure air pipe is connected with an air compressor, and the high-pressure water pipe is connected with a high-pressure water pump.
4. The method for pumping mud in the ultra-deep sea pile according to claim 1, wherein in the step S1, the method comprises the following steps: S101, sailing a crane ship to the vicinity of a foundation pile through a GPS; And S102, anchoring and positioning the crane ship, and completing the carrying work of the first foundation pile, so that the foundation pile is close to the middle position of the crane ship.
5. The method for pumping mud in the ultra-deep sea pile according to claim 1, wherein in the step S2, the method comprises the following steps: Step S201, lifting the mud pumping equipment through a crane ship, and adjusting the arm support angle of the crane ship to enable the mud pumping equipment to be located above a foundation pile; Step S202, slowly lowering the mud pumping equipment according to the GPS, wherein the mud pumping equipment is subjected to auxiliary command under water by a diver, so that the mud pumping equipment accurately enters the foundation pile; and step 203, lowering a mud pumping pipeline connected with the mud pumping pump to the vicinity of the top of the foundation pile through command of a diver.
6. The method for pumping mud in an ultra-deep offshore pile according to claim 5, wherein in step S3, the method comprises the following steps: Step S301, starting mud pumping equipment, and carrying out rotary mud scraping and bottom mud layer stirring on the bottom of the foundation pile through a reamer of the mud pumping equipment; Step S302, outputting high-pressure water through a high-pressure water pipe of the mud pumping equipment to disperse mud at the bottom, Step S303, high-pressure air output by a high-pressure air hole of the mud pumping equipment is used for blowing mud to the top of the foundation pile; and step S304, pumping the sludge in the foundation pile into a sludge receiving pool of the crane ship through a sludge pump until the sludge is pumped to the bottom of the foundation pile.
7. The method for pumping mud in the ultra-deep sea pile according to claim 1, wherein in the step S6, the method comprises the following steps: step S601, moving and lowering the mud pumping equipment into a second foundation pile through a crane ship; step S602, a mud pumping pipeline connected with a mud pumping pump is connected between a first foundation pile and a second foundation pile; And step S603, pumping the sludge in the second foundation pile to the elevation position required by the first foundation pile.

Description

Method for pumping mud in ultra-deep offshore pile Technical Field The invention relates to the technical field of offshore wind power jackets, in particular to a method for pumping mud in ultra-deep offshore piles. Background At present, the four-pile jacket foundation of offshore wind power is a domestic common foundation form, and as the offshore wind power jacket presents deep sea and modularized development characteristics, foundation piles cannot be driven to a designed elevation due to deep sea geology is complex, and if a high-energy hydraulic hammer is adopted, equipment damage rate is high and feasibility is low. Meanwhile, due to the influence of natural factors such as water depth, geology and the like, uncontrollable factors of site construction are increased, and construction efficiency and cost are difficult to control. Disclosure of Invention The invention aims to solve the technical problems of overcoming the defects of the prior art and providing an ultra-deep sea pile inner mud pumping method for pumping mud slag in a deep sea pile so as to clean the mud slag at the bottom of a foundation pile, reduce the friction force and the soil plug effect in the foundation pile, ensure the pile sinking operation of the subsequent foundation pile construction and reduce the use requirement of a high-energy hydraulic hammer. The technical scheme adopted by the invention is that the method for pumping mud in the ultra-deep sea pile comprises the following steps: s1, moving a crane ship to the vicinity of a foundation pile; S2, moving and lowering the mud pumping equipment into the first foundation pile through the crane ship; S3, carrying out rotary mud scraping and bottom mud layer stirring on the bottom of the foundation pile through a reamer of mud pumping equipment, flushing out bottom mud through outputting high-pressure water, blowing mud to the top of the foundation pile through outputting high-pressure air, and pumping the mud to a crane ship; s4, lifting and recycling the mud pumping equipment through a crane ship to finish pile sinking construction of the first foundation pile; S5, moving the crane ship to a second foundation pile; S6, moving and lowering the mud pumping equipment into the second foundation pile, and pumping mud residue in the second foundation pile into the first foundation pile; s7, repeating the above operation, and sequentially completing the mud pumping operation of the residual foundation piles; and S8, after the pile sinking operation of the last foundation pile is completed, backfilling sludge on the crane ship into the last foundation pile. Further, the mud pumping equipment comprises a pipe body, a driving mechanism and a plurality of reamers, wherein a plurality of reamers are positioned at the lower end of the pipe body, the driving mechanism can drive a plurality of reamers to rotate, a high-pressure air pipe and a high-pressure water pipe are arranged on the pipe body, and a plurality of high-pressure air holes are formed in the high-pressure air pipe. Further, the actuating mechanism includes a plurality of hydraulic pressure pipelines, and is a plurality of hydraulic pressure pipelines all are located in the body, hydraulic pressure pipeline's one end is connected with hydraulic oil pump, and the other end is connected with hydraulic motor, hydraulic motor can drive the reamer is rotatory, high-pressure air pipe is connected with the air compressor machine, high-pressure water pipe is connected with high-pressure water pump. Further, in step S1, it includes the steps of: S101, sailing a crane ship to the vicinity of a foundation pile through a GPS; And S102, anchoring and positioning the crane ship, and completing the carrying work of the first foundation pile, so that the foundation pile is close to the middle position of the crane ship. Further, in step S2, it includes the steps of: Step S201, lifting the mud pumping equipment through a crane ship, and adjusting the arm support angle of the crane ship to enable the mud pumping equipment to be located above a foundation pile; Step S202, slowly lowering the mud pumping equipment according to the GPS, wherein the mud pumping equipment is subjected to auxiliary command under water by a diver, so that the mud pumping equipment accurately enters the foundation pile; and step 203, lowering a mud pumping pipeline connected with the mud pumping pump to the vicinity of the top of the foundation pile through command of a diver. Further, in step S3, it includes the steps of: Step S301, starting mud pumping equipment, and carrying out rotary mud scraping and bottom mud layer stirring on the bottom of the foundation pile through a reamer of the mud pumping equipment; Step S302, outputting high-pressure water through a high-pressure water pipe of the mud pumping equipment to disperse mud at the bottom, Step S303, high-pressure air output by a high-pressure air hole of the mud pumping equipment is used for blowing mud to th