WO2013077595A1 - Procédé de construction d'arbre vertical et de forage du fond de la mer - Google Patents

Procédé de construction d'arbre vertical et de forage du fond de la mer Download PDF

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Publication number
WO2013077595A1
WO2013077595A1 PCT/KR2012/009704 KR2012009704W WO2013077595A1 WO 2013077595 A1 WO2013077595 A1 WO 2013077595A1 KR 2012009704 W KR2012009704 W KR 2012009704W WO 2013077595 A1 WO2013077595 A1 WO 2013077595A1
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WO
WIPO (PCT)
Prior art keywords
casing
excavation
construction method
inner casing
vertical sphere
Prior art date
Application number
PCT/KR2012/009704
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English (en)
Korean (ko)
Inventor
박호성
박정환
정재진
황진석
송재면
장현귀
Original Assignee
삼보이엔씨 주식회사
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Application filed by 삼보이엔씨 주식회사 filed Critical 삼보이엔씨 주식회사
Publication of WO2013077595A1 publication Critical patent/WO2013077595A1/fr

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/12—Underwater drilling
    • E21B7/136—Underwater drilling from non-buoyant support
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/12—Underwater drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • E21B15/02—Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D1/00—Sinking shafts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D5/00—Lining shafts; Linings therefor
    • E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials

Definitions

  • the present invention relates to a seabed excavation and vertical sphere construction method, and more particularly to a method for excavating the seabed and to construct a vertical sphere to perform deep intake and drainage of cooling water for industrial facilities.
  • the nuclear power generation facility is a power generation facility for generating electricity by using steam generated by nuclear fission of uranium to make water in a steam generator and operating a turbine by the steam power.
  • the steam used to operate the turbine is cooled in the condenser, made of water, and sent back to the steam generator.
  • the cooling water used is sea water, and after the steam is sufficiently cooled, the cooling water is discharged through the vertical hole of the sea bed.
  • the reason why the warm drainage is discharged from the deep is that when the warm drainage is discharged through the sea floor, the temperature of the seawater is mixed with the deep seawater, which is relatively low.
  • Patent Publication No. 10-0929482 discloses a method for constructing a marine vertical ball for deep intake / drainage.
  • the present invention is to solve the above-mentioned problems of the prior art, the purpose of which can prevent the settlement of the casing is installed for bottom drilling, it is possible to prevent the occurrence of excavator failure due to overload during the bottom drilling It is intended to provide a subsea excavation and vertical sphere construction method.
  • the present invention can support the submerged concrete by connecting the subsidence support to the casing is installed for the bottom surface excavation to prevent the settlement of the casing, by dividing the bottom surface excavation in multiple stages to prevent the overload occurs in the excavator It is possible to provide a subsea excavation and vertical sphere construction method that can prevent the excavator from failing.
  • Figure 1 shows the step of fixing the jack-up pants.
  • Figure 2 shows the step of installing the guide frame on one side of the jack-up pants.
  • 3 to 6 show the step in which the casing is lifted.
  • 7A and 7B show the steps of installing the casing.
  • 9A to 10 illustrate a step of digging a dredging surface.
  • FIG. 11A and 11B are schematic diagrams showing the steps in which the inner casing is manufactured.
  • 16 and 17 show the step of fixing the inner casing.
  • 18A to 18C illustrate steps of dredging the dead stone.
  • FIG. 1 shows a step of fixing a jack-up barge, and dredging the proper position of the sea bottom to form a vertical sphere, that is, the inner casing 90, to form a dredging surface 1, and dredging Position the jack-up pants 10 on the sea so that the casing 50 can be installed on the surface 1 and then fixed by connecting with the dredging surface 1.
  • the dredging surface (1) formed in the step may be formed in various forms, for example, in the embodiment of the present invention is formed so that the shape of the cross section has an inverse rhombus shape. This is to ensure the convenience of the casing 50 to be described in the steps to be described later and the safety during finishing of the installation of the underwater concrete (4).
  • the jack-up pants 10 are installed to allow precise construction without being affected by sea level digging or tidal difference.
  • the jack-up pants 10 are operated by a rack and pinion hydraulic system.
  • the guide frame 30 is a step of installing the guide frame 30 on one side of the jack-up pants 10, one side of the jack-up pants 10, more precisely facing the dredging surface (1) on which the casing 60 will be installed
  • the guide frame 30 is installed at the position.
  • the guide frame 30 is formed in a frame shape as shown in FIG. 2, but may be formed in a plate-like body.
  • the guide frame 30 is mounted with a clamp 31 that can support the casing 50 to install the casing 50 on the dredging surface (1).
  • the clamp 31 may be fixed to the upper portion of the casing 50 to lift the casing 50, and then move the dredging surface 1 to abut the lower portion of the casing 50.
  • 3 to 6 show the steps of lifting the casing 50 sequentially.
  • the casing 50 may be moved to the flat pants 20 using the floating crane 40, wherein the casing 50 may be flat pants (as shown in FIG. 3). 20 may be disposed on the flat pants 20 in a horizontal direction. The casing 50 may be disposed to support a part of the casing 50 on the lifting frame 21 rotatably provided at one side of the flat pants 20.
  • the hook portion 60 of the floating crane 40 is connected to the other side of the casing 50 (one side supported by the lifting frame 21 of the flat pants 20). On the opposite side), wherein the flat pants 20 and the floating crane 40 can be arranged to intersect.
  • the hook portion 60 of the floating crane 40 lifts one side of the casing 50 vertically.
  • the flat pants 20 can rotate the casing 50 arranged in the horizontal direction while moving backwards (moving in the opposite direction to the direction in which the casing 50 is rotated).
  • the lifting frame 21 provided in the flat pants 20 supports the casing 50, one side of the casing 50 is lifted vertically by the hook portion 60 of the floating crane 40.
  • the other side of the ground casing 50 is concentrated in the direction opposite to the direction lifted by the hook portion 60, so that the casing 50 can be rotated from the horizontal direction to the vertical direction while the lifting frame 21 is rotated. Can help.
  • the hook portion 60 may include a main hook 61 and the auxiliary hook 63, the main hook 61 may be connected to one side of the casing 50 through the hook guide frame 61a, The auxiliary hook 63 may be connected to the outer circumferential surface of the casing 50.
  • a plurality of main hooks 61 may be provided, and a plurality of main hooks 61 may be connected to one side of the casing 50 along the circumferential direction of the casing 50.
  • the weight of the casing 50 is distributed evenly to the main hooks 61 and is not transmitted to each main hook 61 differently. If the weight of the casing 50 can be transmitted, and if the weight of the casing 50 is not evenly transmitted to the main hook 61, the center of gravity of the main hook 61 for lifting the casing 50 is disturbed and the casing ( There may be a problem such as 50) tilting.
  • the main hook 61 when the main hook 61 is connected to one side of the casing 50 through the hook guide frame 61a as described above, the plurality of main hooks 61 are previously connected to the hook guide frame 61a at regular intervals.
  • the weight of the casing 50 may be evenly distributed to each main hook 61.
  • auxiliary hooks 63 may be provided, and the auxiliary hooks 63 may be connected to the outer circumferential surface of the casing 50 as described above.
  • the outer circumferential surface of the 50 may be properly spaced apart from the main hook 61.
  • the ratio of the weight of the casing 50 may be varied. That is, when the casing 50 starts to rotate in the vertical direction from the horizontal direction, the auxiliary hook 63 receives more weight of the casing 50, but as the casing 50 rotates in the vertical direction from the horizontal direction, the main hook ( 61 may receive more weight of the casing 50.
  • the casing 50 lifted through the process as described above may be disposed on the dredging surface 1 through the guide frame 30.
  • the casing 50 When the casing 50 is disposed on the dredging surface 1, as shown in FIG. 7A, the casing 50 is supported with the clamp 31 fixed to the upper portion of the casing 50, and the lower portion of the casing 50 is provided. Pour the underwater concrete (4) to a height where it can be fixed.
  • a steel band 51 protruding in the circumferential direction is formed on the lower outer circumferential surface of the casing 50.
  • the steel band 51 is formed when the casing 50 is manufactured on land.
  • the steel band 51 formed below the casing 50 is attached to the underwater concrete 4, so that the casing 50 is settled. Can be effectively prevented.
  • the settlement preventing support 100 is connected to the outer circumferential surface of the casing 50 as shown in FIG. 7B.
  • the settlement prevention support 100 includes a connection member 140 mounted on an outer circumferential surface of the casing 50, and a support member 110 fastened to the connection member 140 and extending outward of the casing 50.
  • the connecting member 140 may be pre-mounted when the casing 50 is manufactured on land before the casing 50 is installed on the dredging surface 1, or after the casing 50 is installed on the dredging surface 1. It can be mounted by a diver, the connecting member 140 may be mounted by bolt fastening or welding by way of example.
  • the support member 110 may be installed in advance in the casing 50, but for example, the support member 110 may be formed of a plurality of unit members having an “I” beam shape.
  • the unit member may be connected to a separate connection part 130, for example, a connection part 130 such as a hinge (plate-shaped plate) by bolting.
  • the unit member may be connected using the connection member 140 instead of the connection component 130.
  • the "I" beam is a commercially available ready-made product, it is easy to obtain, and since bolting between the "I" beams can be easily performed, it is possible to increase workability when the diver connects the unit members underwater. More stable and faster work can be achieved.
  • the connecting member 140 and the supporting member 110 may be connected by installing a casing 50 on the dredging surface 1 and then diving into the seabed to fasten the bolts. If the anti-seizure support 100 is already installed before the casing 50 is placed on the dredging surface 1, the casing 50 may be caused by the anti-sediment support 100 that protrudes radially in the outer radial direction when the casing 50 is transported. The transportation of the 50 may be disturbed, and the settlement preventing support 100 may be damaged due to an impact during transportation.
  • the work of connecting the anti-sedimentation support 100 separately in this manner may facilitate the carrying of the casing 50, and the anti-seizure support 100 ) Can be installed more stably.
  • the steel band 51 formed on the outer circumferential surface of the lower casing 50 and the anti-sink supporter 100 are organically combined on the outer circumferential surface of the casing 50 to prevent the subsidence of the casing 50 more effectively. That is, by further improving the adhesion of the casing 50 to the underwater concrete 4 through the steel band 51, and also by supporting the upper surface of the underwater concrete 4 through the anti-sedimentation support 100 of the casing 50 The effect of preventing settlement can be greatly improved.
  • a step of stacking the sandstone 5 is performed as shown in FIG. 8.
  • the sandstone 5 stacked on the upper side of the underwater concrete 4 serves to support the casing 50 in contact with the outer circumferential surface corresponding to the middle height of the casing 50.
  • 9A and 9B illustrate a step in which the excavators 70 and 70 'vertically excavate the dredging surface 1 through the casing 50, and the excavating step is mainly a first excavation step and a second excavation step. Is made of.
  • FIG. 9A illustrates a first excavation step, in which the first excavation step is an excavation using an excavator 70 which is excavated to a diameter smaller than the inner circumference of the casing 50
  • FIG. 9B is a second excavation step.
  • the second excavation step is to excavate using an excavator 70 'which is excavated to a diameter corresponding to the inner circumference of the casing 50.
  • the excavator when digging the dredging surface (1), by dividing into the first and second excavation step it can be prevented from overloading the excavator when digging a large diameter at a time. Accordingly, the excavator can be prevented from being broken or damaged, so that a quick and stable excavation can be made rather than a case of digging a large diameter at a time.
  • Excavators 70 and 70 ' have a special roller bit formed on the lower side of the dredging surface 1 in contact with the dredging surface 1 to crush the rock with 360 ° rotation.
  • the crushed excavated soil is discharged through the drill rod pipe and collected on the soil carrier.
  • excavating the dredged surface with the excavator (70, 70 ') to fill the water in the casing 50 and excavation can be excavated excavated soil in the form of slime like mud.
  • the crushing stand collapsing prevention work is performed by first making and installing the underwater formwork 81 at the position where the crushing stand 3 is located and placing the underwater concrete 83 between the underwater formwork 81 and the crushing stand 3.
  • the underwater formwork 81 should be installed so that the outer peripheral diameter of the underwater formwork 81 is smaller than the diameter to be excavated to pour the underwater concrete 83 between the underwater formwork 81 and the crushing stand 3 as described above. Can be.
  • Excavating the dredging surface 1 is carried out to pull the inner casing 90 into the excavated portion, the excavation depth is excavated to be shorter than the height of the inner casing (90).
  • the step of installing the inner casing 90 on the excavated portion of the dredging surface 1 is performed.
  • the inner casing 90 installed in the excavated portion is pre-manufactured on land and then lifted and installed.
  • FIGS 11A and 11B are schematic diagrams schematically showing the steps in which the inner casing 90 is manufactured.
  • the inner casing 90 may fill the inside of the steel pipe to prevent the steel pipe from falling after lifting the steel pipe and placing the steel pipe upright.
  • reinforcement concrete is poured on the outer circumference of the steel pipe 90', first, a copper bar and a scaffold are installed around the outer circumference of the steel pipe 90 ', and the reinforcing bars are assembled. . And after installing the formwork around it, the concrete is poured between the outer periphery and formwork of the steel pipe (90 '). After that, the formwork is dismantled and the concrete is cured.
  • the step of pouring reinforced concrete on the outer circumference of the above-described steel pipe (90 ') may be made of a repetitive process by dividing the steel pipe by layers.
  • the step of pouring concrete step by step may be made as it proceeds from 1 to 5 steps as shown in Figure 11b.
  • the inner casing 90 to form the precast lining while pouring reinforced concrete on the outer circumference of the steel pipe (90 ') can be manufactured.
  • the precast lining refers to manufacturing the inner casing 90 so that a circular lining is formed when the cast concrete is precast and viewed from above.
  • FIGS. 12 to 14 a lifting step of the inner casing 90 for pulling the inner casing 90 into the excavated portion of the dredging surface 1 after the inner casing 90 is manufactured is shown in FIGS. 12 to 14. Since the step of lifting the casing 90 is the same as the step of lifting the casing 50 to install the casing 50 in the above description, a description thereof will be omitted.
  • the lower surface of the inner casing 90 may be provided with a drain valve 91
  • the lower side of the inner casing 90 may be provided with a bottom plate 92
  • the bottom plate 92 may be provided with a water flow valve 95. Since the drain valve 91 is provided under the peripheral surface of the inner casing 90, the drain pipe 91 may be connected to the drain valve 91 to drain water when the water filled in the inner casing 90 manufacturing step is drained. .
  • the water filled in the inner casing 90 is not drained immediately after the inner casing 90 is manufactured, but immediately before the inner casing 90 is installed. The reason is that if the air casing 90 is left without filling the inner casing 90, the inner casing 90 may be shaken or fallen due to wind load or the like. That is, in order to prevent such vibrations or movements, the interior of the inner casing 90 should be filled with water when standing on land.
  • water may be filled in the inner casing 90 while the inner casing 90 enters the sea bottom to a predetermined depth.
  • the inner casing 90 is connected to the lower main line tunnel, and the inner casing 90 is connected to the lower main tunnel.
  • the provided bottom plate 92 can be removed.
  • the water filled in the inner casing 90 may be passed through the water flow valve 95 provided in the bottom plate 92 and the bottom plate 92 may be removed. .
  • a plurality of bottom guides 93 may be further provided below the inner casing 90 along the circumferential direction of the inner casing 90.
  • the bottom guide 93 serves to guide the inlet position of the inner casing 90 so that the inner casing 90 can be easily inserted when the inner casing 90 is introduced into the casing 50.
  • the bottom guide 93 may be provided to be inclined in the inner direction of the inner casing 90 toward the lower direction from the starting point of contact with the lower end of the inner casing 90.
  • the mortar 80 is injected between the inner casing 90 and the casing 50 to excavate the inner casing. To the fixed part.
  • a step of temporarily fixing the inner casing 90 drawn into the excavated portion is performed as shown in FIG. 17, wherein the inner casing (
  • the inner casing 90 may be temporarily fixed to the casing 50 by the underwater stator 97 provided in advance above the 90.
  • the diver may enter the casing (50) and fix one side of the underwater holding bracket (97) to the underwater welding (99) on the inner circumferential surface of the casing (50).
  • temporarily fixing the inner casing 90 may facilitate the injection of the mortar 80 in the above-described mortar injection step, and may have an effect of fixing the inner casing 90 at a more accurate position.
  • a step of dredging the dead stone 5 stacked on the outside of the casing 50 is performed.
  • step by step according to the size of the stacked stacking stone (5) to remove the stepping stone (5) and finally the divers are mobilized to finish the work of removing the stone.
  • the dead stone 5 After the dead stone 5 is removed, a work of cutting the casing 50 is performed as shown in FIG. 19.
  • the lower part of the casing 50 is fixed by the underwater concrete 4 in the above-mentioned step. Therefore, since it is difficult to separate the casing 50 from the underwater concrete 4, the diver cuts the casing 50 by using a cutter at a position corresponding to the upper side of the underwater concrete 4. That is, after cutting the casing 50, the construction of the inner casing 90 can be completed by lifting and removing the cut casing 50. In this way, the completed inner casing 90 may be referred to as a vertical seabed.
  • the step of excavating the dredging surface consists of the first excavation step and the second excavation step, when the excavator is excavated by the overload applied to the excavator when excavating a large diameter at one time You can get the effect of preventing flying.
  • the anti-settling support is organically combined with the steel band formed on the outer side of the casing to improve the adhesion of the underwater concrete, it is possible to more effectively prevent the settlement of the casing.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

Un mode de réalisation de la présente invention porte sur un procédé de construction d'arbre vertical et de forage du fond de la mer, lequel procédé met en œuvre : a) la fixation et l'installation d'une barge autoélévatrice pour disposer une enceinte au niveau d'une surface de dragage ; b) l'installation d'un bâti de guidage d'un côté de la barge autoélévatrice ; c) le fait de faire reflotter l'enceinte de façon à disposer l'enceinte au niveau de la surface de dragage à l'aide du bâti de guidage ; d) la disposition de béton sous l'eau à une périphérie externe de l'enceinte ; e) l'installation d'un support de prévention d'affaissement qui supporte une surface supérieure du béton sous l'eau disposé à une surface de périphérie externe de l'enceinte ; f) l'insertion d'une plateforme de forage dans l'enceinte pour forer verticalement la surface de dragage ; g) la préparation d'une enceinte interne ; h) l'insertion de l'enceinte interne dans l'enceinte pour l'installation au niveau d'une partie forée de la surface de dragage ; et i) la coupe et le retrait d'une saillie supérieure du béton sous l'eau de l'enceinte.
PCT/KR2012/009704 2011-11-23 2012-11-16 Procédé de construction d'arbre vertical et de forage du fond de la mer WO2013077595A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2011-0122939 2011-11-23
KR1020110122939A KR101119195B1 (ko) 2011-11-23 2011-11-23 해저 굴착 및 수직구 시공 방법

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6128617A (ja) * 1984-07-18 1986-02-08 Penta Ocean Constr Co Ltd 鋼製杭の打込み固定工法
JP2002146811A (ja) * 2000-11-16 2002-05-22 Kajima Corp 水中構造物基礎の施工法
KR100621410B1 (ko) * 2003-03-26 2006-09-13 배석동 수밀케이션을 이용한 수중 구조물의 건식 시공방법
KR100721676B1 (ko) * 2006-04-12 2007-05-23 삼보지질 주식회사 잭업바지선과 가이드프레임을 이용한 산업시설용 냉각수의심층 취ㆍ배수를 위한 해상수직구 시공방법 및이너케이싱과 케이싱 클램프
KR100880367B1 (ko) * 2008-06-02 2009-01-30 삼보이엔씨 주식회사 수중 용수 취·배수 장치로서의 디퓨저 구축공법 및 그의 제작방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6128617A (ja) * 1984-07-18 1986-02-08 Penta Ocean Constr Co Ltd 鋼製杭の打込み固定工法
JP2002146811A (ja) * 2000-11-16 2002-05-22 Kajima Corp 水中構造物基礎の施工法
KR100621410B1 (ko) * 2003-03-26 2006-09-13 배석동 수밀케이션을 이용한 수중 구조물의 건식 시공방법
KR100721676B1 (ko) * 2006-04-12 2007-05-23 삼보지질 주식회사 잭업바지선과 가이드프레임을 이용한 산업시설용 냉각수의심층 취ㆍ배수를 위한 해상수직구 시공방법 및이너케이싱과 케이싱 클램프
KR100880367B1 (ko) * 2008-06-02 2009-01-30 삼보이엔씨 주식회사 수중 용수 취·배수 장치로서의 디퓨저 구축공법 및 그의 제작방법

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