WO2020059899A1 - Dispositif de mesure de profondeur de pénétration et pieu auquel celui-ci est appliqué - Google Patents

Dispositif de mesure de profondeur de pénétration et pieu auquel celui-ci est appliqué Download PDF

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Publication number
WO2020059899A1
WO2020059899A1 PCT/KR2018/011000 KR2018011000W WO2020059899A1 WO 2020059899 A1 WO2020059899 A1 WO 2020059899A1 KR 2018011000 W KR2018011000 W KR 2018011000W WO 2020059899 A1 WO2020059899 A1 WO 2020059899A1
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WO
WIPO (PCT)
Prior art keywords
optical fiber
pile
file
depth
ground
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Application number
PCT/KR2018/011000
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English (en)
Korean (ko)
Inventor
이금석
Original Assignee
(주)에프비지코리아
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)에프비지코리아 filed Critical (주)에프비지코리아
Priority to PCT/KR2018/011000 priority Critical patent/WO2020059899A1/fr
Publication of WO2020059899A1 publication Critical patent/WO2020059899A1/fr

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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/22—Measuring arrangements characterised by the use of optical techniques for measuring depth
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating

Definitions

  • the present invention relates to an intrusion depth measuring apparatus, and more particularly, to an intrusion depth measuring apparatus for measuring the depth in which a pile applied to an offshore structure or the like is installed, and a pile applied thereto.
  • the fixed offshore wind power generator installed in the Cheonhae Station must be installed in a sea area with excellent wind conditions, it must be designed in a robust structure against marine environmental loads such as wind, tides, waves, etc., and the safety of workers should be considered during maintenance work. do.
  • FIG. 1 is a configuration diagram of a marine wind power generator according to the prior art.
  • the offshore wind power generator includes a support structure, a tower, a transition piece, a substructure, and a foundation structure.
  • the transition piece is a structure connecting a tower and a substructure, and may be classified into a monopile, a jacket, a tripod, or a dolphin according to the type of the substructure.
  • transition piece connects the tower and the sub-structure, installation, maintenance, and inspection work frequently occur, and since it is a discontinuous connection structure, structural damage may occur when an excessive marine environmental load is applied.
  • Patent Documents 1 to 3 below disclose an example of a construction method of a marine structure including an offshore wind power generator and a steel pipe pile applied thereto and a supporting device technology.
  • a suction bucket method has been developed in recent years that installs a bucket on the sub-surface of the seabed and sucks the water inside the bucket with a water pump, leaving only the soil.
  • the suction bucket method As the soil remaining inside the bucket functions as a support for the wind tower, it reduces construction cost and time, and solves problems such as noise, vibration, and floating sand as it is installed in a steering method. can do.
  • Patent Document 1 Korean Patent Registration No. 10-1289821 (announced on July 26, 2013)
  • Patent Document 2 Korean Patent Registration No. 10-1055327 (announced on August 9, 2011)
  • Patent Document 3 Korean Patent Registration No. 10-1206960 (announced on November 30, 2012)
  • the pillars of the substructure are installed at a depth of about 10 m or more, for example, 12 m to 15 m, from the sea floor.
  • the depth in which the file was installed was calculated, so that the depth of penetration of the file could not be accurately measured .
  • An object of the present invention is to solve the problems as described above, and to provide an intrusion installation depth measuring device capable of measuring the depth at which a file applied to an offshore structure is penetrated.
  • Another object of the present invention is to provide an intrusion depth measuring apparatus capable of accurately measuring the depth at which a pile is intrusively installed using an optical fiber and an optical fiber grid sensor, and a file applied thereto.
  • Another object of the present invention is to provide an intrusion depth measuring apparatus capable of measuring a strain applied to a pile, along with the depth of penetration of the pile, and predicting the life of the pile using the measured result, and a file applied thereto.
  • the intrusion depth measuring apparatus is installed at a predetermined interval on the outer surface or the inner surface of the file, so as to measure the intrusion installation depth of the pile intrusively installed on the sea floor or the ground It includes a measuring module, the measuring module is attached to the outer surface or inner surface of the optical fiber installed along the longitudinal direction of the pile and fixed plates that are installed at predetermined intervals on the optical fiber to fix the optical fiber to the pile It is characterized by.
  • the file to which the intrusion depth measuring apparatus according to the present invention is applied is provided with a plurality of measurement modules installed at predetermined intervals along the longitudinal direction on the outer surface or the inner surface, and on the bottom or the ground. It is characterized in that it is possible to measure the depth of penetration.
  • a plurality of measurement modules are installed at regular intervals along the length direction in the pile, and the measurement modules are sequentially brought into contact by contact with the sea floor or the ground. As it is damaged or broken, the effect of being able to measure the depth of penetration of the pile is obtained by measuring the change in the amount of light output from the optical fiber.
  • the effect that the penetration depth of the pile can be measured by using a wavelength change output from a plurality of optical fiber grating sensors installed at regular intervals in the optical fiber is obtained.
  • the present invention it is possible to accurately measure the penetration depth of the pile, improve the precision of the measurement result, increase the workability, and reduce the working time.
  • the strain sensor is additionally installed on the file, the effect of being able to monitor in real time is obtained by measuring the strain rate of the file due to the impact applied to the file when installing the file in a driving manner.
  • the strain rate of the file is measured and monitored in real time due to a typhoon or tsunami, and the life of the file can be predicted using the measured strain rate. The effect that it may be obtained is obtained.
  • FIG. 1 is a configuration diagram of a marine wind power generator according to the prior art
  • FIG. 2 is a block diagram of a file in which an intrusion depth measuring apparatus according to a preferred embodiment of the present invention is installed
  • FIG. 3 is an enlarged view of the penetration depth measuring apparatus shown in FIG. 2,
  • FIG. 4 is a perspective view showing the back of the fixing plate shown in Figure 3,
  • FIG. 6 is an enlarged view of an intrusion depth measuring apparatus according to another embodiment of the present invention.
  • FIG. 7 is an enlarged view of an intrusion depth measuring apparatus according to another embodiment of the present invention.
  • the file applied to the substructure of the offshore wind power generator will be described, but the present invention is not necessarily limited to this, and not only the offshore wind power generator, but various substructures such as drilling ships are fixedly installed on the sea floor. It should be noted that it can be applied to measure the depth of penetration of piles applied to marine structures of type and use.
  • the present invention can be applied not only to offshore structures, but also to measure intrusion depth of piles of buildings built on land.
  • FIG. 2 is a configuration diagram of a file in which an intrusion depth measuring apparatus according to a preferred embodiment of the present invention is installed
  • FIG. 3 is an enlarged view of the intrusion depth measuring apparatus illustrated in FIG. 2.
  • Intrusion depth measuring apparatus 10 according to a preferred embodiment of the present invention, as shown in Figure 2, the bottom surface or the ground (hereinafter abbreviated as 'sea surface') abbreviated to be installed on the outer surface of the file 11 It includes a plurality of measurement modules 20 installed at predetermined intervals along the longitudinal direction of (11).
  • the pile 11 may be formed in a substantially cylindrical shape, but the present invention is not necessarily limited thereto, and the cross section may be applied to a pile provided with a polygonal column or a polygonal cylinder having various shapes such as a square shape or a hexagonal shape.
  • each measurement module 20 is attached to the outer surface of the optical fiber 30 and the pile 11 installed along the longitudinal direction of the pile 11 and installed at predetermined intervals to the optical fiber
  • the fixed plate 40 is fixed to the optical fiber.
  • the measurement module 20 may further include a release plate 50 that breaks or damages the measurement module 20 from the pile 11 by contacting or colliding with the bottom surface in the process of being intrusively installed on the bottom surface. .
  • the interval between each measurement module 20 may be variously changed depending on the length of the pile 11 or the depth to which the pile is to be installed.
  • an interval between each measurement module 20 may be set at an interval of about 10 cm, 20 cm, or 1 m.
  • the present invention can improve the precision of the penetration depth measurement result by setting a narrow gap between each measurement module.
  • the optical fiber 30 is an optical fiber in which a core having a high refractive index glass is provided at the center, and cladding is provided so that light passing through the central glass is totally reflected using glass having a low refractive index at the outer portion of the core.
  • the optical fiber 30 has an advantage that the energy loss is very low, so the loss rate of data transmitted and received is low, and it is hardly affected by external influences.
  • the optical fiber 30 when the optical fiber 30 is deformed by external vibration or shock, the light quantity decreases as the loss of the output light pulse compared to the input light pulse occurs.
  • the present invention is to install the optical fiber on the outer surface of the pile, and install an optical fiber tester (optical time domain reflectometer, OTDR) on one end of the optical fiber to inject light pulses into the optical fiber, and return from being reflected at each point in the longitudinal direction of the optical fiber.
  • an optical fiber tester optical time domain reflectometer, OTDR
  • the distance to the break point of an optical fiber damaged by contact with the sea floor can be measured to measure the depth of penetration of the pile.
  • the present invention is to increase the overall length of the optical fiber 30 by installing a plurality of rolls of the optical fiber 30 disposed between each fixed plate 40 in a roll form, thereby measuring the penetration depth using the optical fiber 30.
  • the precision can be further improved.
  • FIG. 4 is a perspective view showing the rear surface of the fixing plate shown in FIG. 3, and FIG. 5 is an enlarged view of the release plate.
  • the fixed plate 40 may be formed in a substantially rectangular parallelepiped shape with vertical lengths longer than left and right widths.
  • an installation space 41 in which the optical fiber 30 is installed is formed with a width larger than the width of the optical fiber, and the upper and lower ends of the optical fiber 30 are respectively installed at the top and bottom of the installation space 41.
  • Fixing groove 42 may be formed by inserting and fixing.
  • Each fixing groove 42 may be coupled with a fixing member 43 for fixing the optical fiber 30 to maintain a preset tension in a state where the upper and lower ends are inserted.
  • the rear surface of the fixed plate 40 may be formed to be stepped so as to be in contact with the vertical portion 51 of the release plate 50 to be described below.
  • the upper rear portion of the fixed plate 40 is formed to have a thicker thickness than the lower portion, and a stepped face 44 may be formed at the rear central portion of the fixed plate 40.
  • the fixed plate 40 is stably supported by the release plate 50 as it is normally engaged by the stepped plate 44 at the top of the vertical portion 51 of the release plate 50, and when it comes into contact with the sea floor, it is separated. It may be damaged or damaged by receiving force to move upward from the plate 50.
  • a plurality of measurement modules including a fixed plate 40 and a release plate 50 at regular intervals in the optical fiber 30 are arranged, along the longitudinal direction of the pile (11) 20), but the present invention is not necessarily limited thereto.
  • the optical fiber grid sensor 31 is installed at regular intervals on the optical fiber 30, and each optical fiber grid sensor in the installation space 41 inside each fixed plate 40 ( 31) can be changed to be arranged.
  • the present invention can also measure the penetration depth of the pile using a change in wavelength output from the optical fiber grating sensor due to damage or breakage of the separation plate and the fixed plate installed at the contact point upon contact with the seabed surface.
  • the fixing plate 40 may be made of a synthetic resin material such as plastic so that it can be easily damaged or broken when contacted with the sea floor.
  • the separation plate 50 is as shown in Figures 3 and 5, so that the cross-section is approximately 'L' shape, from the vertical portion 51 and the lower portion of the vertical portion 51 installed on the outer surface of the pile 11 It may include a horizontal portion 52 is bent toward the front.
  • the penetration plate depth can be accurately measured by easily detaching the separation plate from the pile when contacting the bottom surface and the separation plate.
  • a coupling hole 53 to which a lower portion of the fixing plate 40 installed on the outer surface of the pile 11 is coupled may be formed at a rear end of the horizontal portion 52.
  • the optical fiber 30 and the fixed plate 40 are installed on the outer surface of the pile 11 so that the separation plate 50 can be installed, the same as the diameter of the optical fiber 30 or the optical fiber 30 )
  • With a larger width than the diameter of the installation groove 54 may be formed to communicate with the rear end of the coupling hole (53).
  • the release plate 50 may be made of a material made of a metal material having a stiffness equal to or higher than a predetermined strength, so as to maintain a shape such that external vibration or shock is applied.
  • FIG. 6 is an enlarged view of an intrusion depth measuring apparatus according to another embodiment of the present invention.
  • the measurement module 20 applied to the penetration depth measuring apparatus 10 is similar to the configuration of the measurement module 20 described with reference to FIG. 3, as shown in FIG. However, it may be changed to provide a buoyancy body 55 on the release plate 50.
  • the shape and size of the buoyancy body 55 may be variously changed according to the size of the separation plate 50.
  • the buoyancy body having a smaller specific gravity than water such as styrofoam
  • the present invention can prevent the measurement module deviated between the measurement module in a state attached to the seabed and the pile, thereby improving measurement accuracy.
  • FIG. 7 is an enlarged view of an intrusion depth measuring apparatus according to another embodiment of the present invention.
  • the intrusion depth measuring apparatus 10 is similar to the configuration of the intrusion depth measuring apparatus 10 described with reference to FIG. 2, as shown in FIG. 7, but only a plurality of measurement modules Among the 20, it may be changed to further include a reference plate 60 installed below the measurement module 20 installed at the bottom.
  • the reference plate 60 may be installed at a right angle to the outer surface of the pile 11 so as to be arranged parallel to the bottom surface.
  • a pair of flanges 61 that are in contact with the outer surface of the pile 11 is formed at both ends of the reference plate 60, and the pair of flanges 61 uses an attachment member 62 such as a magnet. It may be detachably attached to the outer surface of the pile (11).
  • the present invention is to install the reference plate having a larger cross-sectional area than the measurement module or the release plate at the bottom of the intrusion depth measuring device, it is possible to quickly release the reference plate and the bottom measurement module when in contact with the sea floor.
  • the present invention can easily check the initial contact point with the seabed surface, and can prevent the measurement error that occurs when the measurement module is deformed when it comes into contact with the seabed surface.
  • the operator arranges the fixing plates 40 at predetermined intervals on the optical fiber 30 formed to be elongated.
  • the optical fiber 30 may be provided with a plurality of optical fiber grating sensors 32 installed at predetermined intervals.
  • the optical fibers 30 are disposed in the installation space 41 formed on the rear surface of the fixed plate 40, and the optical fibers 30 are inserted into the fixed grooves 42 formed at the upper and lower rear surfaces of the fixed plate 40, respectively.
  • the fixing member 43 is coupled to fix the optical fiber 30 to the fixing plate 40.
  • the optical fibers 30 on which the fixing plates 40 are installed are disposed along the length direction of the pile 11, and each fixing plate 40 is sequentially attached to the outer surface of the pile 11 using an adhesive.
  • the separation plate 50 is disposed at the front lower portion of each fixed plate 40.
  • the operator inserts the optical fiber 30 extending below the fixed plate 40 into the installation groove 54 formed in the vertical portion 51 of the separation plate 50. Then, the fixed plate 40 is moved upward to couple the fixed plate 40 and the release plate 50.
  • the release plate 50 may be coupled by moving upward until the upper end of the vertical portion 51 contacts the stepped plate 44 formed on the rear surface of the fixed plate 40.
  • the lower portion of the fixed plate 40 is coupled to the coupling hole 53 formed in the horizontal portion 52 of the separation plate 50 and protrudes below the separation plate 50.
  • the fixed plate 40 and the release plate 50 to be coupled as described above may be adhered to each other by applying adhesive to the back of the lower end of the fixing plate 40 and the front of the vertical portion 51 of the release plate 50.
  • the file 11 may be vertically arranged on the sea floor, and can be intrusively installed on the sea floor using a steering method or a suction bucket method.
  • the plurality of measurement modules 20 installed in the file 11 are sequentially damaged or damaged while contacting the sea floor.
  • the optical fiber tester for inputting the optical pulse to the optical fiber 30 is in contact with the sea floor using a change in the amount of light output through the optical fiber 30 or a wavelength change in the optical pulse output from the optical fiber grid sensor 31 It is possible to measure the distance from the broken point of the measurement module 20.
  • the present invention installs a plurality of measurement modules at regular intervals on the outer circumferential surface of the file, and the measurement modules are sequentially damaged or damaged by contact with the sea floor or the ground, and the amount of light output from the optical fiber is reduced. By measuring change, you can measure the depth of penetration of a pile.
  • the present invention can also measure the penetration depth of a file by using a wavelength change output from a plurality of optical fiber grating sensors installed at regular intervals on the optical fiber.
  • the file applied to the substructure of the offshore wind power generator has been described, but the present invention is not necessarily limited to this, and the substructure such as the offshore wind power generator, as well as a drilling ship, is fixed to the bottom of the sea. It can be changed to be applicable when measuring intrusion installation depth of piles applied to offshore structures of various forms and uses and structures built on land.
  • the measurement module is installed on the outer surface of the file, but the present invention can be changed to install the measurement module on the inner surface of the file.
  • the present invention can be modified to further install a strain sensor on the outer or inner surface of the pile.
  • the strain sensor may calculate the depth to which the pile is to be installed on the sea floor or the ground, and may be installed on the top of the interface between the sea floor or the ground.
  • the present invention may be applied to strain sensors of various structures and methods in addition to the above-described optical fiber grid strain sensors.
  • the file can be monitored in real time by measuring the strain rate of the file due to an impact applied to the file when installing the file in a driving manner.
  • the strain rate of the file can be measured and monitored in real time due to typhoons or tsunamis, and the life of the file can be predicted using the measured strain rate.
  • optical fiber grating sensor 40 fixed plate
  • the present invention is applied to a technique for measuring the depth at which a pile of an offshore structure or a land structure is intrusively installed on the sea floor or the ground.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Hydrology & Water Resources (AREA)
  • Radar, Positioning & Navigation (AREA)
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  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un dispositif de mesure de profondeur de pénétration pour mesurer la profondeur d'installation de pénétration d'un pieu prévu pour pénétrer un fond marin ou le sol et un pieu auquel celui-ci est appliqué, le dispositif comprenant une pluralité de modules de mesure disposés à des intervalles prédéfinis sur la surface externe ou interne du pieu, les modules de mesure comprenant des fibres optiques disposées dans la direction longitudinale du pieu et des plaques de fixation, qui sont fixées à la surface externe ou interne du pieu et sont disposées sur les fibres optiques à des intervalles prédéfinis de façon à fixer les fibres optiques au pieu et ainsi la pluralité de modules de mesure sont disposés sur le pieu à des intervalles prédéfinis dans une direction longitudinale et, lorsque les modules de mesure sont endommagés ou brisés séquentiellement en raison d'un contact avec le fond marin ou le sol, le changement de la quantité de lumière émise à partir des fibres optiques est mesuré pour mesurer la profondeur de pénétration du pieu.
PCT/KR2018/011000 2018-09-18 2018-09-18 Dispositif de mesure de profondeur de pénétration et pieu auquel celui-ci est appliqué WO2020059899A1 (fr)

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PCT/KR2018/011000 WO2020059899A1 (fr) 2018-09-18 2018-09-18 Dispositif de mesure de profondeur de pénétration et pieu auquel celui-ci est appliqué

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Application Number Priority Date Filing Date Title
PCT/KR2018/011000 WO2020059899A1 (fr) 2018-09-18 2018-09-18 Dispositif de mesure de profondeur de pénétration et pieu auquel celui-ci est appliqué

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS616887B2 (fr) * 1978-09-07 1986-03-01 Teijin Ltd
KR101148930B1 (ko) * 2010-05-07 2012-05-23 한국에너지기술연구원 Ｆｂｇ센서 모듈, 2축 ｆｂｇ센서 모듈, ｆｂｇ센서 모듈 제작 장치 및 ｆｂｇ센서 모듈 제작 방법
US20120147924A1 (en) * 2010-12-08 2012-06-14 Baker Hughes Incorporated System and method for distributed environmental parameter measurement
KR101253288B1 (ko) * 2012-01-10 2013-04-10 한국광기술원 광섬유 격자 센서를 이용한 변화량 감지 장치 및 그 측정 방법
KR101314857B1 (ko) * 2012-07-16 2013-10-04 한국철도기술연구원 변형률 측정 모듈 및 이를 결합한 변형률 측정 장치
KR101944897B1 (ko) * 2017-08-03 2019-02-07 (주)에프비지코리아 관입 깊이 측정장치 및 그가 적용된 파일

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS616887B2 (fr) * 1978-09-07 1986-03-01 Teijin Ltd
KR101148930B1 (ko) * 2010-05-07 2012-05-23 한국에너지기술연구원 Ｆｂｇ센서 모듈, 2축 ｆｂｇ센서 모듈, ｆｂｇ센서 모듈 제작 장치 및 ｆｂｇ센서 모듈 제작 방법
US20120147924A1 (en) * 2010-12-08 2012-06-14 Baker Hughes Incorporated System and method for distributed environmental parameter measurement
KR101253288B1 (ko) * 2012-01-10 2013-04-10 한국광기술원 광섬유 격자 센서를 이용한 변화량 감지 장치 및 그 측정 방법
KR101314857B1 (ko) * 2012-07-16 2013-10-04 한국철도기술연구원 변형률 측정 모듈 및 이를 결합한 변형률 측정 장치
KR101944897B1 (ko) * 2017-08-03 2019-02-07 (주)에프비지코리아 관입 깊이 측정장치 및 그가 적용된 파일

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