CN113431040A - Single-pile construction process and self-elevating wind power installation platform - Google Patents
Single-pile construction process and self-elevating wind power installation platform Download PDFInfo
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- CN113431040A CN113431040A CN202110872794.0A CN202110872794A CN113431040A CN 113431040 A CN113431040 A CN 113431040A CN 202110872794 A CN202110872794 A CN 202110872794A CN 113431040 A CN113431040 A CN 113431040A
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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
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
- E02D7/10—Power-driven drivers with pressure-actuated hammer, i.e. the pressure fluid acting directly on the hammer structure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
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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
- E02D13/04—Guide devices; Guide frames
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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
- E02D13/06—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers for observation while placing
Abstract
The invention provides a single-pile construction process and a self-elevating wind power installation platform, which comprise the following steps: moving the self-elevating fan mounting platform to the position near the pile position, and roughly positioning the platform by using an anchoring device; the position of a self-elevating fan mounting platform is displayed through the DGPS, the length of an anchor cable is adjusted, the platform is accurately positioned, and the center of the hydraulic pile gripper is ensured to be positioned at the center of a pile position; the lifting device lowers the pile legs, inserts the pile legs into the seabed plane and lifts the self-elevating fan installation platform; the crane lifts and moves the single pile to the hydraulic pile gripper by using a steel wire rope, the verticality deviation of the single pile is controlled and adjusted to be not more than 0.1% by using the hydraulic pile gripper, and a hydraulic pile hammer is used for piling the single pile; the hydraulic pile gripper is used for controlling the verticality deviation of the single pile, the verticality deviation of the single pile is always kept to be not more than 0.1% in the piling process of the single pile, the verticality when the single pile sinks is guaranteed, the construction operation efficiency is improved, and the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of fan installation processes, in particular to a single-pile construction process and a self-elevating wind power installation platform.
Background
With the rapid development of economic construction in China, the influence of electric energy on economic construction and life of people is larger and larger, with the increasing price of petroleum resources and coal resources, the increasing requirements of people on low carbon and environmental protection, and the increasingly prominent advantages of clean energy, wind power generation is more and more emphasized by various countries in the world as a green energy, and is widely developed and utilized.
In the prior art, when a single pile is generally sunk into soil to a certain depth, a hydraulic pile hammer is used for piling piles on pile legs, so that the pile legs are sunk to a specified depth, the single pile can deviate during sinking before piling or after piling, and if the pile body deviates and is not adjusted in time, the wind power generation platform is unstable, and even topples and other dangers can be caused; the pile foundation shifting is easily caused in the pile sinking and piling process in the existing single-pile construction process, the pile body shifting is lack of real-time monitoring, and the verticality monitoring strength is insufficient.
Disclosure of Invention
Aiming at the defects, the invention aims to provide a single-pile construction process and a self-elevating wind power installation platform, solves the problems that pile body deflection is easily caused in single-pile driving construction, the monitoring strength on the verticality of the pile body is insufficient, and guarantees the verticality and stability of a pile foundation in single-pile construction.
In order to achieve the purpose, the invention adopts the following technical scheme:
a single pile construction process comprises the following steps:
s1: moving the self-elevating fan mounting platform to the position near the pile position, and roughly positioning the platform by using an anchoring device;
s2: moving the self-elevating fan mounting platform to a set coordinate through the full-rotation propeller, displaying the position of the self-elevating fan mounting platform through the DGPS, adjusting the length of an anchor cable, accurately positioning the platform, and ensuring that the center of the hydraulic pile gripper is positioned at the center of a pile position;
s3: the lifting device lowers the pile legs, inserts the pile legs into the seabed plane and lifts the self-elevating fan installation platform;
s4: the crane lifts the single pile by using a steel wire rope, slowly releases the single pile from the center of the hydraulic pile gripper, and controls and adjusts the verticality deviation of the single pile to be not more than 0.1% through the hydraulic pile gripper;
s5: after the self-weight of the single pile descends stably, a hydraulic pile hammer is used for piling the single pile;
s6: after the pile is driven, the hydraulic pile gripper loosens a single pile, the lifting device retracts pile legs, the self-elevating fan mounting platform descends to the water surface, and after the anchoring device is anchored, the self-elevating fan mounting platform withdraws.
Preferably, the piling operation of the single pile by the hydraulic piling hammer in the step S5 includes the following steps:
s51: confirming that the verticality of the single pile is between 0.05 and 0.10 percent, and if the verticality exceeds the range, adjusting the verticality of the single pile through the hydraulic pile gripper; if the verticality of the single pile meets the requirement of the full range, executing the next step;
s52: the hydraulic pile driving hammer adopts a light driving hammer to perform inching for 2-3 hammers, inching is continued after stopping for 5min, and if the verticality of a single pile exceeds 0.10%, the hydraulic pile gripper is controlled to adjust the angle deviation of the single pile and correct the pile driving angle; if no abnormity exists, continuously inching the hammer for 2-3 times, and stopping, and observing the verticality deviation of the single pile after repeating for 3-4 times;
s53: ensuring that the verticality deviation of the single pile is between 0.05 and 0.10 percent, and continuously pounding the hammering force again to carry out piling operation on the single pile.
Preferably, in step S53, the following method is adopted for continuously piling the single pile:
the single pile penetration depth is less than 10 m: observing the verticality deviation of the single pile once and adjusting the angle deviation of the single pile once every pile sinking for 1-2 m;
the single pile penetration depth is between 10m and 30 m: observing the verticality deviation of the single pile once and adjusting the angle deviation of the single pile once every 3-4m of the pile;
the single pile penetration depth exceeds 30 m: the hydraulic pile hammer is used for continuously piling the single pile.
Preferably, in step S5, the crane continuously and slowly lowers the steel wire rope under the action of the self-weight of the single pile, the pile body sinks into the soil to a certain depth, and the pile body is stagnated and stabilized, at this time, the actual self-weight depth of the pile body is compared with the theoretically calculated self-weight depth of the pile body, and if there is an obvious difference, the analysis is performed in time and whether the adjustment is required or not is determined; when the sinking depth of the single pile is normal and stable, the crane continues to slowly lower the steel wire rope, the steel wire rope is in a state of no unhooking and no stress, the single pile is observed for 15min, and if the pile body of the single pile has no depth and inclination change, the next construction procedure is carried out; if the pile body is changed, the observation is continued, and the next construction procedure is not carried out until the single pile is not changed within 15 min.
Preferably, two-layer all is equipped with hydraulic stretching running roller hydro-cylinder and displacement sensor about the hydraulic pressure pile gripper, embraces the single pile tightly through hydraulic stretching running roller hydro-cylinder, and when the straightness skew that hangs down of single pile needs the adjustment, displacement sensor detects the piston rod extension length of hydraulic stretching running roller hydro-cylinder, sends the piston rod that the analysis passes through two-layer adjustment hydraulic stretching running roller hydro-cylinder down and stretches out and draw back to the straightness that hangs down of adjustment single pile.
Preferably, in step S2, the hydraulic pile gripper is installed on the cross sliding device, the cross sliding device pushes the arm of the hydraulic pile gripper out of the jack-up fan installation platform, and the center of the arm of the hydraulic pile gripper is adjusted to coincide with the center of the pile position by moving the hydraulic pile gripper on the cross sliding device.
Preferably, the self-elevating wind power installation platform provided by the invention is applied with the single-pile construction process and comprises a platform body, an anchoring device, a lifting device, pile legs, a full-rotation propeller, a crane, a hydraulic pile gripper and a hydraulic pile hammer;
the anchoring devices are arranged on a bow and a stern of the platform body and used for fixing the platform body;
the four full-rotation propellers are respectively arranged on the bow and the stern of the platform body, two full-rotation propellers of the bow are used for steering and propelling, and two full-rotation propellers of the stern are used for propelling;
the lifting devices are arranged at four corners of the platform body and used for controlling the lifting of the pile legs;
the crane is arranged above the platform body and is used for hoisting an object by using a steel wire rope for carrying;
the hydraulic pile gripper is arranged on one side of the platform body and used for gripping and positioning a single pile;
the hydraulic pile driving hammer is arranged above the platform body and is used for piling a single pile;
the hydraulic pile hammer is provided with a sensing detection device and an analysis device, the sensing detection device detects displacement of the pile body in all directions and synchronously transmits the displacement to the analysis device, and the analysis device calculates a deviation angle according to a received displacement value.
Preferably, the hydraulic pile embracing device comprises an embracing arm and hydraulic telescopic roller cylinders, the embracing arm is provided with two layers, each layer of the embracing arm is at least provided with four hydraulic telescopic roller cylinders, and the hydraulic telescopic roller cylinders are arranged along the circumference of the embracing arm along the four hydraulic telescopic roller cylinders; the hydraulic telescopic roller oil cylinder is provided with a displacement sensor and is used for detecting the extending displacement of an oil cylinder piston rod.
Preferably, the hydraulic pile gripper is slidably arranged on a cross sliding device, and the cross sliding device is fixed on one side of the platform body.
One of the above technical solutions has the following advantages or beneficial effects:
the single-pile construction process is applied to the self-elevating wind power installation platform, the hydraulic pile gripper is used for controlling the verticality deviation of the single pile from the time when the single pile is placed into the hydraulic pile gripper, the verticality deviation of the single pile is kept to be not more than 0.1% all the time in the piling process of the single pile, the verticality when the single pile sinks can be guaranteed, single-pile stabilizing measures are optimized, the construction operation efficiency is improved, and the construction cost is reduced.
Drawings
FIG. 1 is a schematic flow diagram of one embodiment of a single pile construction process according to the present invention;
fig. 2 is a schematic flow chart of an embodiment of the piling operation of the single pile by the hydraulic piling hammer in step S5 in the single pile construction process of the present invention;
fig. 3 is a schematic flow chart of an embodiment of the present invention, in which step S53 continues to pile the mono-pile;
FIG. 4 is a schematic top plan view of one embodiment of a self-elevating wind power installation platform proposed by the present invention;
fig. 5 is a schematic perspective view of an embodiment of a hydraulic pile gripper in a self-elevating wind power installation platform according to the present invention.
Wherein: the pile driving platform comprises a platform body 100, an anchoring device 200, a lifting device 300, pile legs 400, a full-rotation propeller 500, a crane 600, a hydraulic pile gripper 800, a holding arm 801, a hydraulic telescopic roller oil cylinder 802 and a cross sliding device 803.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.
In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A single pile construction process according to an embodiment of the present invention is described below with reference to fig. 1 to 3, including the following steps:
s1: moving the self-elevating fan mounting platform to the position near the pile position, and roughly positioning the platform by using an anchoring device;
s2: moving the self-elevating fan mounting platform to a set coordinate through the full-rotation propeller, displaying the position of the self-elevating fan mounting platform through the DGPS, adjusting the length of an anchor cable, accurately positioning the platform, and ensuring that the center of the hydraulic pile gripper is positioned at the center of a pile position;
s3: the lifting device lowers the pile legs, inserts the pile legs into the seabed plane and lifts the self-elevating fan installation platform;
s4: the crane lifts the single pile by using a steel wire rope, slowly releases the single pile from the center of the hydraulic pile gripper, and controls and adjusts the verticality deviation of the single pile to be not more than 0.1% through the hydraulic pile gripper;
s5: after the self-weight of the single pile descends stably, a hydraulic pile hammer is used for piling the single pile;
s6: after the pile is driven, the hydraulic pile gripper loosens a single pile, the lifting device retracts pile legs, the self-elevating fan mounting platform descends to the water surface, and after the anchoring device is anchored, the self-elevating fan mounting platform withdraws.
Specifically, in the embodiment, the pile legs are arranged on two sides of the platform, so that the effective area of a deck can be increased, the pile legs can be truss type pile legs or cylindrical pile legs, the pile shoes adopt detachable pile shoes with pile punching systems, different pile shoes are replaced aiming at different seabed geology, the puncture phenomenon is prevented, and the adaptability of the platform is improved; the DGPS is a Differential Global positioning System (DGPS for short), which is a technology for improving civil positioning accuracy by using a Differential technology to enable a user to obtain higher accuracy from a GPS on the basis of the GPS and is applied to the GPS, in the embodiment, a self-elevating fan mounting platform is moved to the Position close to a pile Position of a fan mounting machine Position, an anchoring device is used for anchoring to perform coarse positioning, then the DGPS is used for assisting the self-elevating fan mounting platform to perform accurate positioning, longitude and latitude data of the mounting machine Position are collected, the DGPS is used for controlling the accuracy within a meter level, and accurate positioning can be realized by matching with the anchoring device; the center of the hydraulic pile gripper is positioned at the center of the pile position, namely the sinking center of a single pile is superposed with the preset pile position center, so that the positioning accuracy of the single pile is improved; in addition, the hydraulic pile gripper is provided with a verticality measuring instrument, the verticality error of the pile foundation can be measured, the verticality of the pile foundation is monitored and measured by using the verticality measuring instrument when the hydraulic pile gripper is placed into a single pile, and the verticality deviation of the single pile is controlled and adjusted by using the hydraulic pile gripper, so that the verticality of the single pile is always kept within 0.1 percent, the verticality when the single pile sinks can be ensured, the single-pile stabilizing measure is optimized, the construction operation efficiency is improved, and the construction cost is reduced.
Further, the piling operation of the single pile by the hydraulic piling hammer in the step S5 includes the following steps:
s51: confirming that the verticality of the single pile is between 0.05 and 0.10 percent, and if the verticality exceeds the range, adjusting the verticality of the single pile through the hydraulic pile gripper; if the verticality of the single pile meets the requirement of the full range, executing the next step;
s52: the hydraulic pile driving hammer adopts a light driving hammer to perform inching for 2-3 hammers, inching is continued after stopping for 5min, and if the verticality of a single pile exceeds 0.10%, the hydraulic pile gripper is controlled to adjust the angle deviation of the single pile and correct the pile driving angle; if no abnormity exists, continuously inching the hammer for 2-3 times, and stopping, and observing the verticality deviation of the single pile after repeating for 3-4 times;
s53: ensuring that the verticality deviation of the single pile is between 0.05 and 0.10 percent, and continuously pounding the hammering force again to carry out piling operation on the single pile.
Specifically, in this embodiment, under the condition that it is ensured that the single pile perpendicularity meets the requirement (the single pile perpendicularity is controlled to be 0.05% to 0.10% before the hydraulic pile driving hammer starts to operate), the hydraulic pile driving hammer is started, pile driving is performed by using the hammering force for tapping the pile body, and the smaller hammer lifting height (<500mm) and the slower hammering speed are set for the pile driving hammer by using the hammering force for tapping, so that the hammering penetrating power does not exceed 2000KN to realize the effect of tapping; stopping for a period of time after tapping the 2-3 hammers, continuously tapping the 2-3 hammers after no abnormality, stopping for a period of time again, repeating for 3-4 times, and then starting to pounding the hammer force to pile a single pile, wherein the pounding force is set for the pile hammer with a larger hammer lifting height (more than 1000mm) and a faster hammering speed, so that the pounding penetration force reaching more than 4000KN can realize the pounding effect; in the whole process, the pile driving hammer analysis device analyzes the pile driving state according to the received stress condition of each point of the pile to obtain a deviation angle, sends a hammer stopping signal to the pile driving hammer control system when the deviation angle exceeds a threshold value, and sends a deviation correcting signal to the hydraulic pile gripper, the hydraulic pile gripper corrects the angle of the pile body according to the deviation correcting signal to ensure that the verticality deviation is between 0.05 and 0.10 percent, the verticality of the pile body is ensured before continuous hammering, the phenomenon that the pile body has large verticality deviation during continuous hammering can be avoided, the stability of the pile body during pile driving is improved, single-pile stabilizing measures are further optimized, and the construction operation efficiency is improved; .
Further, the following method is adopted for continuously piling the mono pile in step S53:
the single pile penetration depth is less than 10 m: observing the verticality deviation of the single pile once and adjusting the angle deviation of the single pile once every pile sinking for 1-2 m;
the single pile penetration depth is between 10m and 30 m: observing the verticality deviation of the single pile once and adjusting the angle deviation of the single pile once every 3-4m of the pile;
the single pile penetration depth exceeds 30 m: the hydraulic pile hammer is used for continuously piling the single pile.
Specifically, in the process of continuously piling a single pile, the problem of the angle deviation of the verticality also occurs, so that the pile body needs to be observed for the continuous angle deviation, in the embodiment, the whole piling process is divided into three stages, namely, the single pile penetration depth is less than 10m, the penetration depth is between 10m and 30m, and the penetration depth exceeds 30m, because the single pile penetration depth is less than 10m, the centering and guiding functions of the pile embracing device can play an effective deviation rectifying role, the verticality deviation of the single pile needs to be observed and the angle deviation needs to be adjusted more frequently in the stage, and when the single pile penetration depth is between 10m and 30m, the verticality angle of the single pile is basically stabilized, and the centering and guiding functions of the pile embracing device gradually lose the effect along with the penetration depth, so that the frequency of observing and adjusting the verticality deviation of the single pile is reduced, finally, the single pile penetration depth exceeds 30m, the centralizing and guiding functions of the pile gripper are disabled, no adjustment measure can be taken, continuous piling of the hydraulic piling hammer is changed, the verticality of the single pile is required to be kept to be not more than 0.15% all the time in the whole process, the verticality of the pile body is effectively guaranteed through observation and adjustment of the pile body, the piling precision is improved, the piling operation efficiency is improved, the piling construction process is simplified, and the construction cost is reduced.
Further, in step S5, the crane continuously and slowly lowers the steel wire rope under the action of the self-weight of the single pile, the pile body sinks into the soil to a certain depth, and the pile body is stagnated and stabilized, at this time, the actual self-weight depth of the pile body is compared with the self-weight depth of the pile body calculated theoretically, and if there is an obvious difference, analysis is carried out in time and whether adjustment is required or not is determined; when the sinking depth of the single pile is normal and stable, the crane continues to slowly lower the steel wire rope, the steel wire rope is in a state of no unhooking and no stress, the single pile is observed for 15min, and if the pile body of the single pile has no depth and inclination change, the next construction procedure is carried out; if the pile body is changed, the observation is continued, and the next construction procedure is not carried out until the single pile is not changed within 15 min.
Specifically, after the tubular pile is placed into the hydraulic pile gripper, the pile body needs to be driven under the action of self gravity to sink the pile, and the pile driving operation is started after the pile sinking is stable, so that the stability of single pile primarily sinking is facilitated, and excessive angle deviation is avoided Under the state of no stress, the pile body is separated from the acting force of the steel wire rope, observation is carried out only under the action of gravity, and the next construction process is carried out until no change exists in the single pile within 15min, so that the stability of the single pile after pile sinking is improved, the perpendicularity of the pile body is effectively guaranteed, and the pile driving precision is improved.
Further, two-layer hydraulic stretching running roller hydro-cylinder and displacement sensor all are equipped with about the hydraulic pressure pile gripper, hold tightly the single pile through hydraulic stretching running roller hydro-cylinder, and when the straightness skew that hangs down of single pile needs the adjustment, displacement sensor detects the piston rod extension length of hydraulic stretching running roller hydro-cylinder, sends the piston rod that the analysis passes through two-layer adjustment hydraulic stretching running roller hydro-cylinder down and stretches out and draw back to the straightness that hangs down of adjustment single pile.
Specifically, in this embodiment, hydraulic pile gripper is right and the angle of pile body is rectified, mainly control through hydraulic telescoping roller hydro-cylinder, all distribute around the pile body has hydraulic telescoping roller hydro-cylinder, the piston rod of hydraulic telescoping roller hydro-cylinder stretches out and holds tightly the pile body, the piston rod end of hydraulic telescoping roller hydro-cylinder is equipped with the running roller simultaneously, the running roller can roll motion on the pile body, thereby improve the smoothness that the single pile descends, the displacement that the piston of two-layer hydraulic telescoping roller hydro-cylinder stretches out is adjusted the angle of pile body about utilizing, safety and stability, the stability and the work efficiency that the pile body was rectified is effectively improved.
Further, in step S2, the hydraulic pile gripper is installed on the cross sliding device, the cross sliding device pushes the arm of the hydraulic pile gripper out of the jack-up fan installation platform, and the center of the arm of the hydraulic pile gripper is adjusted to coincide with the center of the pile position by moving the hydraulic pile gripper on the cross sliding device.
Specifically, in this embodiment, hydraulic pressure pile gripper can remove through cross slide device, and when fixing a position hydraulic pressure pile gripper, can adjust hydraulic pressure pile gripper's position through cross slide device, be favorable to adjusting hydraulic pressure pile gripper's armful arm center and the center of stake position to the coincidence, the operation is more simple and convenient, also makes things convenient for follow-up secondary position adjustment that carries on.
The invention also provides a self-elevating wind power installation platform, which is applied with the single-pile construction process and is shown in the attached drawings 4 and 5, and comprises a platform body 100, an anchoring device 200, a lifting device 300, pile legs 400, a full-rotation propeller 500, a crane 600, a hydraulic pile gripper 700 and a hydraulic pile hammer;
the anchoring devices 200 are disposed on the bow and stern of the platform body 100, and are used for fixing the platform body 100;
the four full-rotation propellers 500 are respectively arranged on the bow and the stern of the platform body 100, the two full-rotation propellers 500 on the bow are used for steering and propelling, and the two full-rotation propellers 500 on the stern are used for propelling;
the lifting devices 300 are disposed at four corners of the platform body 100, and are used for controlling the lifting of the spud legs 400;
the crane 600 is arranged above the platform body 100, and lifts an object by using a steel wire rope for carrying;
the hydraulic pile gripper 700 is arranged on one side of the platform body 100 and used for gripping and positioning a single pile;
the hydraulic pile driving hammer is arranged above the platform body 100 and is used for piling a single pile;
the hydraulic pile hammer is provided with a sensing detection device and an analysis device, the sensing detection device detects displacement of the pile body in all directions and synchronously transmits the displacement to the analysis device, and the analysis device calculates a deviation angle according to a received displacement value.
Specifically, in this embodiment, the full-circle-turning propeller 500 pushes the platform body 100 to move to a position near the pile of the fan installation site, the fore and the stern of the platform body 100 are fixed by the anchoring device 200, the four-corner spud legs 400 are lowered by the elevating device 300, inserted into the seabed for fixation, and the platform body 100 is lifted at the same time, then the hydraulic pile gripper 700 is aligned with the center of the pile position, the crane 600 lifts the single pile by using a steel wire rope, the single pile is slowly released from the center of the hydraulic pile gripper 700, the single pile is driven by using a hydraulic pile driving hammer after the self-weight of the single pile descends stably, in the piling process, the displacement of the pile body in each direction is detected by using the sensing detection device and is synchronously transmitted to the analysis device, the analysis device calculates a deviation angle according to the received displacement value, and then the verticality deviation angle of the pile body is adjusted by using the hydraulic pile gripper 700; the verticality deviation of the single pile is always kept to be not more than 0.1%, the verticality of the single pile during sinking can be guaranteed, single-pile stabilizing measures are optimized, construction operation efficiency is improved, and construction cost is reduced.
Further, the hydraulic pile embracing device 700 comprises a embracing arm 701 and hydraulic telescopic roller oil cylinders 702, wherein the embracing arm 701 is provided with two layers, each layer of the embracing arm 701 is at least provided with four hydraulic telescopic roller oil cylinders 702, and the four hydraulic telescopic roller oil cylinders 702 are arranged along the circumference of the embracing arm 701; the hydraulic telescopic roller cylinder 702 is provided with a displacement sensor for detecting the extension displacement of a cylinder piston rod.
Specifically, to hydraulic pressure pile gripper 700 location back, two armful arms 701 are for opening the state, put into the back with the single pile, and two armful arms 701 close to hold tightly the pile body, drive hydraulic stretching running roller hydro-cylinder 702 simultaneously, utilize stretching out of two liang of relative hydro-cylinder piston rods that set up to press from both sides tightly the pile body, simultaneously armful arm 701 is equipped with two-layerly, not only can strengthen the stability of holding tightly the pile body, and adjusts the better deviation angle to the pile body through upper and lower two-layer hydro-cylinder, effectively improves the stability and the work efficiency that the pile body rectified.
Further, the hydraulic pile gripper 700 is slidably disposed on a cross sliding device 703, and the cross sliding device 703 is fixed to one side of the platform body 100.
Specifically, in fixing a position hydraulic pile gripper 700, hydraulic pile gripper 700 can move through cross slide 703, adjusts the center of embracing arm 701 center and the stake position of hydraulic pile gripper 700 to the coincidence for hydraulic pile gripper 700's location is more convenient, and the operation is more simple and convenient, also makes things convenient for the follow-up secondary position adjustment that carries on.
Other constructions and operations of a single pile construction process and a jack-up wind power installation platform according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A single pile construction process is characterized in that: the method comprises the following steps:
s1: moving the self-elevating fan mounting platform to the position near the pile position, and roughly positioning the self-elevating fan mounting platform by using an anchoring device;
s2: moving the self-elevating fan mounting platform to a set coordinate through the full-rotation propeller, displaying the position of the self-elevating fan mounting platform through the DGPS, adjusting the length of an anchor cable, accurately positioning the self-elevating fan mounting platform, and ensuring that the center of the hydraulic pile gripper is positioned at the center of a pile position;
s3: the lifting device lowers the pile legs, inserts the pile legs into the seabed plane and lifts the self-elevating fan installation platform;
s4: the crane lifts the single pile by using a steel wire rope, releases the single pile from the center of the hydraulic pile gripper, measures the verticality deviation of the pile body by using the verticality measuring instrument of the hydraulic pile gripper, and controls the verticality deviation of the measured single pile to be not more than 0.1 percent by using the hydraulic pile gripper;
s5: after the self-weight of the single pile descends stably, a hydraulic pile hammer is used for piling the single pile;
s6: after the pile is driven, the hydraulic pile gripper loosens a single pile, the lifting device retracts pile legs, the self-elevating fan mounting platform descends to the water surface, and after the anchoring device is anchored, the self-elevating fan mounting platform withdraws.
2. The single pile construction process according to claim 1, wherein: the piling operation of the hydraulic piling hammer on the single pile in the step S5 includes the following steps:
s51: confirming that the verticality of the single pile is between 0.05 and 0.10 percent, and if the verticality exceeds the range, adjusting the verticality of the single pile through the hydraulic pile gripper; if the verticality of the single pile meets the requirement of the range, executing the next step;
s52: the hydraulic pile driving hammer adopts a light driving hammer to perform inching for 2-3 hammers, inching is continued after stopping for 5min, and if the verticality of a single pile exceeds 0.10%, the hydraulic pile gripper is controlled to adjust the angle deviation of the single pile and correct the pile driving angle; if no abnormity exists, continuously inching the hammer for 2-3 times, and stopping, and observing the verticality deviation of the single pile after repeating for 3-4 times;
s53: ensuring that the verticality deviation of the single pile is between 0.05 and 0.10 percent, and continuously pounding the hammering force again to carry out piling operation on the single pile.
3. The mono-pile construction process according to claim 2, characterized in that: in step S53, the following method is used to continue piling the single pile:
the single pile penetration depth is less than 10 m: observing the verticality deviation of the single pile once and adjusting the angle deviation of the single pile once every pile sinking for 1-2 m;
the single pile penetration depth is between 10m and 30 m: observing the verticality deviation of the single pile once and adjusting the angle deviation of the single pile once every 3-4m of the pile;
the single pile penetration depth exceeds 30 m: the hydraulic pile hammer is used for continuously piling the single pile.
4. The single pile construction process according to claim 1, wherein: in the step S5, the crane continuously and slowly releases the steel wire rope under the action of the self-weight of the single pile, the pile body sinks into the soil to a specified depth, and the pile body is stagnated and stabilized, at this time, the actual self-weight soil-entry depth is compared with the self-weight soil-entry depth calculated theoretically, and if an obvious difference exists, analysis is carried out in time and whether adjustment is determined; when the sinking depth of the single pile is normal and stable, the crane continues to slowly lower the steel wire rope, the steel wire rope is in a state of no unhooking and no stress, the single pile is observed for 15min, and if the pile body of the single pile has no depth and inclination change, the next construction procedure is carried out; if the pile body is changed, the observation is continued, and the next construction procedure is not carried out until the single pile is not changed within 15 min.
5. The single pile construction process according to claim 1, wherein: the method comprises the steps that at least two sets of hydraulic telescopic roller oil cylinders at different positions are used for holding single piles tightly, wherein the positions comprise an upper layer position and a lower layer position, when the verticality deviation of the single piles needs to be adjusted, the actual extension length of a piston rod of the hydraulic telescopic roller oil cylinder is detected, the actual extension length of the piston rod is sent to an analysis device, the piston rod of the hydraulic telescopic roller oil cylinder at the upper layer position and the lower layer position is controlled to stretch, and therefore the verticality of the single piles is adjusted.
6. The single pile construction process according to claim 1, wherein: in step S2, the hydraulic pile gripper is installed on the cross sliding device, the arm of the hydraulic pile gripper is pushed out of the jack-up fan installation platform by the cross sliding device, and the center of the arm of the hydraulic pile gripper is adjusted to coincide with the center of the pile position by the movement of the hydraulic pile gripper on the cross sliding device.
7. A self-elevating wind power installation platform is applied with the single-pile construction process of any one of claims 1 to 6, and is characterized in that: the hydraulic pile driving device comprises a platform body, an anchoring device, a lifting device, pile legs, a full-rotation propeller, a crane, a hydraulic pile gripper and a hydraulic pile hammer;
the anchoring devices are arranged on a bow and a stern of the platform body and used for fixing the platform body;
the four full-rotation propellers are respectively arranged on the bow and the stern of the platform body, two full-rotation propellers of the bow are used for steering and propelling, and two full-rotation propellers of the stern are used for propelling;
the lifting devices are arranged at four corners of the platform body and used for controlling the lifting of the pile legs;
the crane is arranged above the platform body and is used for hoisting an object by using a steel wire rope for carrying;
the hydraulic pile gripper is arranged on one side of the platform body and used for gripping and positioning a single pile;
the hydraulic pile driving hammer is arranged above the platform body and is used for piling a single pile;
the hydraulic pile hammer is provided with a sensing detection device and an analysis device, the sensing detection device detects displacement of the pile body in all directions and synchronously transmits the displacement to the analysis device, and the analysis device calculates a deviation angle according to a received displacement value.
8. The self-elevating wind power installation platform according to claim 7, wherein: the hydraulic pile embracing device comprises an embracing arm and hydraulic telescopic roller oil cylinders, wherein the embracing arm is provided with two layers, each layer of the embracing arm is at least provided with four hydraulic telescopic roller oil cylinders, and the hydraulic telescopic roller oil cylinders are arranged along the circumference of the embracing arm along the four hydraulic telescopic roller oil cylinders; the hydraulic telescopic roller oil cylinder is provided with a displacement sensor and is used for detecting the extending displacement of an oil cylinder piston rod.
9. The self-elevating wind power installation platform according to claim 7, wherein: the hydraulic pile gripper is slidably arranged on the cross sliding device, and the cross sliding device is fixed on one side of the platform body.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116623659A (en) * | 2023-07-20 | 2023-08-22 | 中交第一航务工程局有限公司 | Piling monitoring method and device for piling ship, electronic equipment and medium |
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Application publication date: 20210924 |