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1. 发明专利

JPH0941876A ARCUATE UNDERGROUND LAYING METHOD FOR PIPE 失效
公开(公告)号：JPH0941876A
公开(公告)日：1997-02-10
申请号：JP21397395
申请日：1995-08-01
申请人： NIPPON STEEL CORP
发明人： NOZAKI KEITA , OSAWA SHINICHI , SAKUTA KENICHI
IPC分类号： E21D9/093 , E21D9/06 , F16L1/024
摘要： PROBLEM TO BE SOLVED: To maintain pipe laying track of a pipe with accuracy in work execution and quickly and smoothly conduct the laying work even when the conditions of the soil properties or the like are changed. SOLUTION: A shield machine 2 is installed on the start side, a pipe propelling force applying device 21a is installed on the arrival side, and an advancing pipe 3 is installed in an arc shape by the shield machine 2 and an excavating device 6 provided at the front end of the advancing pipe 3. An expanding pipe 9 is connected to the advancing pipe 3 on the arrival side, the ground is expansively excavated by an expanding device 10 provided at the connection section of the advancing pipe 3 and the expanding pipe 9, and the expanding pipe 9 is drawn by the shield machine 2. When the expanding pipe 9 is connected to an laying pipe 11 and the laying pipe 11 is drawn by the shield machine 2, back tension is applied to the expanding pipe 9 or the laying pipe 11 by the pipe propelling force applying device 21a, and the laying track of a pipe is adjusted, or the backward drawing force is applied by the propelling force applying device 21a, reciprocating action are applied to the pipe together with the forward drawing force of the shield machine 2, and the resistance of the soil properties is reduced.

2. 发明专利

JPH0949586A REDUCTION METHOD FOR PERIPHERAL SURFACE FRICTION OF UNDERGROUND PIPE 失效
公开(公告)号：JPH0949586A
公开(公告)日：1997-02-18
申请号：JP22269995
申请日：1995-08-08
申请人： NIPPON STEEL CORP
发明人： NOZAKI KEITA , OSAWA SHINICHI , SAKUTA KENICHI
IPC分类号： F16L1/024
摘要： PROBLEM TO BE SOLVED: To provide a smooth long distance excavation at the time of work such as the extraction removal and propulsion of an established pipe by removing the earth and sand around an underground pipe and dissolving the restraint of the ground. SOLUTION: When an excavation pipe 1 can not be advanced by the restraint of an outer peripheral ground 2 during the removal work or propulsion work of an underground established pipe 1, a cylindrical jig 10 arranged a nozzle in its front/rear side is externally fitted on the outer periphery of the established pipe 1 or the excavation pipe 1 and a pressurized water 5 is supplied to this jig through a moving pipe 16 and jetted from the nozzle. By this injection, the earth and sand staying around the estabilished pipe 1 or the excavation pipe 1 is removed and peripheral surface friction is reduced. Thereby, the extraction removal of the established pipe 1 or the re-advance of the excavation pipe 1 is carried out.

3. 发明专利

JPH1096389A DRILLING METHOD FOR SHAFT OF LARGE DEPTH AND DEVICE THEREOF 失效
公开(公告)号：JPH1096389A
公开(公告)日：1998-04-14
申请号：JP27130296
申请日：1996-09-24
申请人： NIPPON STEEL CORP , TEISEKI SAKUSEI KOGYO KK
发明人： NOZAKI KEITA , YOSHIWAKA HIDEHIKO , FUSHIDA TAKASHI , ISHIBASHI YOICHI , ONO SHIKARI
IPC分类号： E21D1/03 , E21D5/01
摘要： PROBLEM TO BE SOLVED: To drill a shaft of large depth safely and smoothly so as to shorten the construction period by drilling the shallow part of ground while protecting the drilled hole with a casing tube, and succeedingly drilling the deep part of ground by a rotary drilling method under the condition in which the casing tube is left as a guide tube for protecting the hole wall. SOLUTION: After a casing rotary drilling machine 1 drills up to the deep part of ground 21, a turn table 30 for rotating a kelly-bar 13 used for the rotary drilling machine is built in the casing clamp of the casing rotary drilling machine 1, and it is connected to the kelly-bar 13. Under the condition in which a casing tube 3 with a casing bit 2 is left as a guide protecting the shallow part of ground, a drilling bit 12 is inserted into the casing tube>e 3, and it is hung down until it reaches the drilled hole bottom. The drilling bit 12 is rotated while adding liquid pressure into the drilled hole so as to protect the hole wall, and drilling is executed by a rotary drilling method. Hereby, danger of collapse of the shallow part of ground is reduced, the number of processes is omitted, and hence efficiency of the drilling work can be improved.

4. 发明专利

JPH09126354A METHOD FOR LAYING PIPE IN ARC-SHAPE UNDER GROUND BY ADJUSTING BALANCING FORCE IN PIPE TIP PART 失效
公开(公告)号：JPH09126354A
公开(公告)日：1997-05-13
申请号：JP30328795
申请日：1995-10-30
申请人： NIPPON STEEL CORP
发明人： OSAWA SHINICHI , NOZAKI KEITA , SAKUTA KENICHI
IPC分类号： F16L55/12 , F16L1/00 , F16L1/024
摘要： PROBLEM TO BE SOLVED: To arrange a large bore pipe on a suitable track and lay the pipe in arc-shape under the ground without deviating from a planned track on a laying track having the small radius of curvature. SOLUTION: This method makes buoyancy 1 produced by muddy water 10 acting on an external pipe 2 balance with the weight of a pipe 1 and filled up water 20a to lay the pipe in arc-shape under the ground. In this case, a balancing force adjusting means 11 to buoyancy produced by the muddy water is provided in the tip part of the pipe so as to be operable on the ground, and in a process where the pipe is laid by pushing-in or drawing-in, the balancing force in the tip part of the pipe is adjusted through the balancing force adjusting means 11 to properly arrangedly provide the pipe on the laying track.

5. 发明专利

JP2000282479A CONSTRUCTION METHOD FOR REPAIRING EXISTING CATCHMENT PILE 失效
公开(公告)号：JP2000282479A
公开(公告)日：2000-10-10
申请号：JP8850999
申请日：1999-03-30
申请人： NIPPON STEEL CORP
发明人： HAGAMIDA HIROAKI , SAITO TAKUYA , IGUCHI KATSUHIKO , NOZAKI KEITA , SUZUKI TSUNEMASA
IPC分类号： E02D17/20
摘要： PROBLEM TO BE SOLVED: To provide a construction method for repairing an existing catchment pile which can be constructed efficiently, is excellent in economy, relatively excellent in safety, shortens the term of construction work, and gentle with natural environment. SOLUTION: Steel segments 3 obtained when a cylinder whose assembled form has an outside diameter slightly smaller than the interior wall of an existing water collecting pile is circumferentially and axially divided into plural portions, and a setting member (positioning and bearing member) 5 for use when the segments 3 are formed into a cylinder unit 4 and installed are prepared. These members are formed into the cylinder unit 4 on the ground with the setting member 5 located above, and are sequentially hung down whereby a cylinder made of steel plates is installed for use in repair.

6. 发明专利

JPH09126353A METHOD FOR LAYING PIPE UNDER GROUND IN ARC-SHAPE BY UTILIZING BUOYANCY 失效
公开(公告)号：JPH09126353A
公开(公告)日：1997-05-13
申请号：JP30328895
申请日：1995-10-30
申请人： NIPPON STEEL CORP
发明人： OSAWA SHINICHI , NOZAKI KEITA , SAKUTA KENICHI
IPC分类号： F16L1/024
摘要： PROBLEM TO BE SOLVED: To accurately correspond to the circumstantial variation of the wall of an excavated hole for smoothly arranging a pipe on a laying track in the case of laying the pipe under the ground. SOLUTION: In a method for laying a pipe in arc-shape under the ground by balancing buoyancy produced by muddy water 10 acting on an external pipe 2 with the weight of a pipe 1 and filled up water 13a, 13b, water 13a, 13b is discharged from or filled up in one or both of a gap between the external pipe 2 and an inner pipe 3 or the inner pipe 3. Thus a balanced state among the buoyancy produced by the muddy water 10, the pipe 1 and water 13a, 13b is broken to make the pipe 1 float or sink in the longitudinal direction of the pipe 1 for pressing the wall of an excavated hole 8 to enlarge it, and frictional force between the hole wall and the external pipe 2 can be thereby reduced to smoothly arrange the pipe 1 on a laying track.

7. 发明专利

JPH08326964A UNDERGROUND LEAD-IN CONSTRUCTION METHOD FOR PIPE 失效
公开(公告)号：JPH08326964A
公开(公告)日：1996-12-10
申请号：JP15881695
申请日：1995-06-02
申请人： NIPPON STEEL CORP
发明人： ONO TOSHITAKA , OBA NOBUO , NOZAKI KEITA
IPC分类号： E21D9/06 , F16L1/024
摘要： PURPOSE: To provide a long distance underground laying process of pipe which can prevent the breakage of a drill pipe, in a construction process to lay a large diameter of pipe while expanding a small diameter of hole. CONSTITUTION: The processing device is composed of a hole expanding device which furnishes a rotatable device 3, a large diameter hole expansion head 5, its rotation driving device 7, and a skin plate 10 provided to cover the front end periphery of pipes 14 divided at specific lengths slidable, at the rear end of a drill pipe 2 in a small diameter hole, and a lead-in jack device 11 provided at the front end of the pipes 14. Furthermore, at the rear end of the lead-in jack device 11, divided pipes 14 are connected, and they are combined movable by intermediate drawing jack device 15 respectively, and after a hole expansion process to expand the front part of the pipe at a specific length by rotating the hole expansion head 5 while adding a tensile force to the drill pipe 2 is carried out, the lead-in jack device 11 is operated, and then, the intermediate drawing jack devices 15 are operated in order, so as to repeat a pipe lead-in process to draw in the pipe as one stroke without rotating, alternately.

8. 发明专利

JPH07286683A UNDERGROUND LEAD-IN METHOD FOR BURIED PIPE 失效
公开(公告)号：JPH07286683A
公开(公告)日：1995-10-31
申请号：JP10168594
申请日：1994-04-18
申请人： NIPPON STEEL CORP
发明人： ONO TOSHITAKA , KAWABATA KAZUO , NOZAKI KEITA
IPC分类号： E21D9/06 , F16L1/024
摘要： PURPOSE:To accomplish an underground lead-in method for a buried pipe by which trouble such as breakage or the like in a drill pipe can be prevented in an installing method for a buried pipe with a large diameter while expanding the diameter of a small bore previously excavated. CONSTITUTION:A buried pipe underground lead-in device consisting of a bore expanding device 3, a rotary swivel device 5, a lead-in jack device provided in the front end part of a buried pipe 10, and a bore wall protecting pipe 12 arranged so as to cover the buried pipe 10 is connected to the rear end of a drill pipe 2 inserted into the previously excavated small diameter bore 1, and tensile force and rotational force are simultaneously applied to the drill pipe 2 by means of an excavating device arranged in the front end of the drill pipe 2, and then, a bore expanding process, in which the buried pipe 10 front part, is expanded to the predetermined length, is carried out while the bore expanding device is rotated. Subsequently, the lead-in jack device 9 is operated by employing the drill pipe 2 as reaction force, and the buried pipe is led into the ground while the buried pipe lead-in process for leading in the buried pipe 10 without any rotation by one stroke is repeated alternately.

9. 发明专利

JPS63179274A METHOD FOR DETECTING UNDERGROUND POSITION OF TIP OF PROPULSION TUBE USING RADIO WAVE 失效
公开(公告)号：JPS63179274A
公开(公告)日：1988-07-23
申请号：JP893587
申请日：1987-01-20
申请人： NIPPON STEEL CORP
发明人： KURODA YOSHINORI , MORI KATSUHIRO , SHIMA HIROSHI , NOZAKI KEITA
IPC分类号： G01V3/12 , G01S11/00 , G01S11/02
摘要： PURPOSE:To detect a propulsion tube with high accuracy by moving a transmitter on the ground surface nearly at right angles to the axial direction of the propulsion tube, sending a radio wave to right below and receiving the radio wave signal by a receiver, and measuring the arrival time and level of this radio wave signal. CONSTITUTION:The radio wave signal is sent to right below from the transmitter 3 fitted to a carriage 14 installed on the ground. The receiver 2 is installed on the top of the propulsion tube 1 and the radio wave signal received by the receiver 2 is amplified by an amplifier 12, sent to a signal processor 11 on the ground through a cable run through the propulsion tube 1 and a shaft 7, and displayed on a display device 6. Here, the transmitter 3 sends the impulsive radio wave intermittently while moving nearly at right angles to the axis of the propulsion tube 1. At this time, the value of the movement distance is obtained from the number of turns of the tires of the carriage 14 and sent to the processor 11. The process of transmission and reception is repeated to obtain a measurement result. Thus, the propulsion tube is detected with high accuracy.

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