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1. 发明专利

JPH0426397B2 失效
公开(公告)号：JPH0426397B2
公开(公告)日：1992-05-07
申请号：JP10956286
申请日：1986-05-15
申请人： SHINNIPPON SEITETSU KK , DAIWA TANSA GIJUTSU KK
发明人： HASEGAWA HISASHI , SAKO YOSHIHIRO , GUNJI SHIGERU , WATANABE TAKESHI
IPC分类号： E21D9/093 , E21D9/06 , G01V3/08 , G01V3/10

2. 发明专利

JPS62266484A INSPECTION FOR TIP POSITION OF EXCAVATION TUBE USING MAGNETIC SENSOR 失效
公开(公告)号：JPS62266484A
公开(公告)日：1987-11-19
申请号：JP10956286
申请日：1986-05-15
申请人： NIPPON STEEL CORP , DAIWA TANSA GIJUTSU KK
发明人： HASEGAWA HISASHI , SAKO YOSHIHIRO , GUNJI SHIGERU , WATANABE TAKESHI
IPC分类号： E21D9/093 , E21D9/06 , G01V3/08 , G01V3/10
摘要： PURPOSE:To enable inspection of an absolute position of the tip of an excavation tube without generating accumulative errors, by lowering a magnetic sensor into a plurality of drilling holes excavated on a line crossing a target propulsion orbit to detect magnetism. CONSTITUTION:In a non-open excavation underground propulsion method, a plurality of vertical drilling holes (a), (b), (c), (d)... are excavated into soil 2 on both sides of a target propulsion orbit 1 between a start point and an arrival point at proper intervals on a line crossing the target propulsion orbit 1 and the individual drilling holes are treated to prevent the collapse of the hole walls thereof and a non-magnetic pipe 5 such as vinyl chloride pipe is inserted into each hole so that a magnetic sensor can be moved into or out of it smoothly. An excavation is done while grasping the propulsion distance of an excavation pipe 6 and when the tip of the excavation pipe 6 arrives among the drilling holes (a)-(d), magnetic sensors lower into the drilling hole at a uniform speed while measuring the depth to detect and record residual magnetism or magnetism caused by magnetization at the tip of the excavation pipe 6. The horizontal and vertical positions of the tip of the excavation pipe 6 are determined by a specified formula from a peak value of the recorded data.

3. 发明专利

JP2019020184A 電磁探査方法审中-公开
公开(公告)号：JP2019020184A
公开(公告)日：2019-02-07
申请号：JP2017136902
申请日：2017-07-13
申请人： DAIWA TANSA GIJUTSU KK
发明人： OKUZUMI KOICHI
IPC分类号： G01V3/08 , G01V3/10 , G01V3/15
摘要：【課題】地下や中空のケーシング内、水中等の探査対象に対し電磁探査を行う際、人工構築物等の探査対象でない比抵抗異常体の影響を除去して探査対象の電磁探査をより正確に行う。【解決手段】受信センサ(Rx)2を通り、かつ、探査対象に対し垂直な対称面πの両側にそれぞれ一次電磁場を発生させる対称面πの両側それぞれの対称誘導電流送信源(Tx)4a,(Tx’)4bを対称面πに対し空間的に面対称になるように設置し、対称面πの両側それぞれの対称誘導電流送信源(Tx)4a,(Tx’)4bは、それぞれ、対称面πに対し、空間的かつ時間的に面対称に同じ大きさの電流を制御して流し、受信センサ(Rx)2では、地下1次元比抵抗構造に垂直な対称面πの両側それぞれの対称送信源(Tx)4a,(Tx’)4bそれぞれが発生した一次電磁場により探査対象において発生した二次電磁場の応答を受信する。【選択図】図1

4. 发明专利

JPH09126832A METHOD FOR MEASURING SUBSIDENCE OF GROUND AT RECLAIMED PART CONTINUOUSLY FOR LONG TERM 失效
公开(公告)号：JPH09126832A
公开(公告)日：1997-05-16
申请号：JP28745495
申请日：1995-11-06
申请人： DAIWA TANSA GIJUTSU KK , WATANABE TAKESHI
发明人： WATANABE TAKESHI
IPC分类号： E02B3/18 , G01C13/00 , G01D21/00
摘要： PROBLEM TO BE SOLVED: To measure the subsidence of ground on the bottom face of sea in a reclaimed land continuously by disposing a rod magnet having a nonmagnetic plate vertically on the bottom of sea, repeating measurement using upper and lower two point magnetic field strength detectors disposed on a nonmagnetic vessel while shifting the vessel inch by inch, measuring the water level through a water gauge, measuring the draft on the vessel and correcting the draft with a value from the detector. SOLUTION: A permanent rod magnet 3 having a nonmagnetic plate 2 is disposed vertically on the bottom of sea. The magnetic field generated therefrom is measured using a set or more of upper and lower differential detectors 4, 5 disposed vertically, while spaced apart from each other, on a nonmagnetic vessel. Output from the detector 5 is then divided by the output from the detector 4 to obtain a detection value. Measurement is repeated while shifting the vessel S inch by inch and a maximum measurement is expressed in terms of depth value. Since the vessel S moves up and down with respect to the ground due to a tide, water level is measured through a water gauge 16 and the value detected through detector is corrected with a draft measured on the vessel S.

5. 发明专利

JPH0972192A DETECTION METHOD OF DRIVING PIPE FRONT END POSITION 失效
公开(公告)号：JPH0972192A
公开(公告)日：1997-03-18
申请号：JP25447595
申请日：1995-09-07
申请人： NIPPON STEEL CORP , DAIWA TANSA GIJUTSU KK
发明人： OSAWA SHINICHI , AKU TOSHIO
IPC分类号： E21D9/093 , E21D9/06 , F16L1/00 , G01B7/00
摘要： PROBLEM TO BE SOLVED: To control the deviation of a driving pipe front end position from a plan by carrying out work while simultaneously detecting vertical and horizontal displacements of the driving pipe front end when non-open underground excavation work is carried out and to provide a track with high degree of accuracy. SOLUTION: A magnetic field generation coil 7 is installed on an excavation route 1 of non-open excavation work, at a point when the driving pipe front end in the ground reaches directly under the coil or near the coil, DC or square AC is supplied to the coil 7 from a power supply device 8a, and magnetic field is generated in the ground. Field intensity in that case is detected by a magnetic sensor 11 installed in the driving pipe front end, and vertical and horizontal positions of the magnetic sensor 11 are detected by obtaining a position having the coincidence of the value of the field strength with theoretical field obtained from an attitude of the front end, current value and coil shape detected at a time.

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