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1. 发明专利

JPH0885937A METHOD AND STRUCTURE AS COUNTERMEASURE FOR GROUND LIQUEFACTION 失效
公开(公告)号：JPH0885937A
公开(公告)日：1996-04-02
申请号：JP22528894
申请日：1994-09-20
申请人： HAZAMA GUMI , NIPPON STEEL CORP
发明人： NISHI KUNIO , RYU HIROYOSHI , MIHARA MASAYA , OHASHI MIKIO , HASEGAWA HISASHI , TAKEUCHI KANJI , TATSUHARA TAKESHI
IPC分类号： E02B11/00 , E02D3/10 , E02D27/34
摘要： PURPOSE: To reduce the costs and enhance the easiness in execution of works by fitting by pressure each water draining pipe in the horizontal direction with a mild slope under the ground in a shallower position below the initial subsoil water level, and lifting the subsoil water gathered by the draining pipe to over the ground surface by a pump. CONSTITUTION: Each pair of water draining pipes 5 are fitted by pressure horizontally with a mild slope so that each edge member of the yard to be improved 1 is formed from pits 4 installed in the diagonal positions A, B. The pipes 5 are at this time located at a still deeper position relative to the original subsoil water level, and through them the subsoil water staying in the pits 4 is lifted to over the ground by a pump 10 at normal times. With this pumping-up of the subsoil water, the original subsoil water level is subsided to the pipe buried depth, This allows lifting the water with a minor scale facility, installing draining pipes safely and easily under the ground around any existing structure, avoiding the ground sedimentation through suppression of the subsoil water lifting amount, and also avoiding certainly the ground liquefaction through making the pumping-up operation effective in the specific region.

2. 发明专利

JPH08120661A DEVICE FOR GROUND UNDER EXISTING STRUCTURE FOR PREVENTING LIQUEFACTION OF GROUND 失效
公开(公告)号：JPH08120661A
公开(公告)日：1996-05-14
申请号：JP27862594
申请日：1994-10-19
申请人： NIPPON STEEL CORP , HAZAMA GUMI
发明人： HASEGAWA HISASHI , TAKEUCHI TAKASHI , TATSUHARA TAKESHI , SAITO TAKUYA , NISHI KUNIO , OHASHI MIKIO , KATO TOSHIAKI
IPC分类号： E02D3/12 , E02D3/10 , E02D31/08
摘要： PURPOSE: To easily execute works for providing the ground under an existing structure with means that work for preventing liquefaction of the ground on the occasion of an earthquake. CONSTITUTION: A curved bore is built, starting from a starting point provided to the ground surface 4 on one side of an existing structure 1, to a depth on a stratum 3 to be improved because of its liability to liquefaction. Then, excavation holes 6 are burrowed, starting from the lower end of the curved bore, to the inside of the stratum 3 to be improved, or the underside of the stratum 3, approximately in a straight line in a length extending over the underside of a single or a plurality of existing structures, and works for providing the ground with means for preventing liquefaction are executed, using the excavation holes 6.

3. 发明专利

JPH09328989A CATCHMENT PIPE EMBEDDING METHOD 失效
公开(公告)号：JPH09328989A
公开(公告)日：1997-12-22
申请号：JP14715296
申请日：1996-06-10
申请人： NIPPON STEEL CORP , NICHIA STEEL WORKS
发明人： TATSUHARA TAKESHI , GUNJI SHIGERU , TAKEUCHI TAKASHI , ETSUNO YUJI
IPC分类号： E21D9/06
摘要： PROBLEM TO BE SOLVED: To allow catchment without requiring a number of catchment pipes to prevent the liquefaction of a sand ground. SOLUTION: A pilot pipe 12 is curvedly driven from a departure into a ground until its end arrives at a destination and a drill pipe 13 capped on the outside of the pilot pipe 12 is driven until its end arrives at the destination or the departure. A catchment pipe formed by winding a small pitch of wire rod on the outer periphery of a core material cylindrically arranged at a space is connected to the end of the drill pipe 13, the drill pipe 13 is pulled to the departure or the destination to draw the catchment pipe 1 into the ground and then the pilot pipe 12 is extracted.

4. 发明专利

JPH10131212A CONSTRUCTION METHOD FOR UNDERGROUND TANK 失效
公开(公告)号：JPH10131212A
公开(公告)日：1998-05-19
申请号：JP29089396
申请日：1996-10-31
申请人： NIPPON STEEL CORP , SHIMIZU CONSTRUCTION CO LTD , JGC CORP
发明人： YOSHIWAKA HIDEHIKO , ISHIBASHI YOICHI , FUSHIDA TAKASHI , GUNJI SHIGERU , TATSUHARA TAKESHI , DENDA ATSUSHI , YONEYAMA KAZUYUKI , HASHIMOTO NOBUYUKI
IPC分类号： E02D29/00 , B65G5/00
摘要： PROBLEM TO BE SOLVED: To safely and easily execute a large-depth cylindrical underground tank. SOLUTION: A large-depth hole 11 is excavated while a protective liquid 13 is filled inside, and a holding means 12 capable of holding a tank main body is provided at its ground surface section. The tank main body is constituted of a bottomed cylindrical tank bottom section 14a and many cylindrical tank wall sections 14b connected on it, they are connected upward in sequence to form a connection body 14d, and it is hoisted and supported by a crane 16 and lowered in the protective liquid 13 in the vertical attitude. Water 17 is filled in the connection body 14d to adjust a suspended load so that the connection body 14d can be sunk without being floated, and a part of buoyancy is utilized to prevent the suspended load from becoming excessive. The tank wall sections 14b are connected upward to extend the connection body 14d upward while the connection body 14d is held by the holding means 12. After the tank main body is formed, a filler is filled between its bottom face and the hole bottom face for the consolidation of foundation, and the filler is also filled between the tank main body and hole wall face.

5. 发明专利

JPH08261361A UNDERGROUND LAYING METHOD FOR BURIED PIPE 失效
公开(公告)号：JPH08261361A
公开(公告)日：1996-10-11
申请号：JP9017495
申请日：1995-03-23
申请人： NIPPON STEEL CORP
发明人： HASEGAWA HISASHI , TAKEUCHI TAKASHI , TATSUHARA TAKESHI
IPC分类号： E21D9/06 , F16L1/024
摘要： PURPOSE: To save a space for a ground for a work needed on a ground by a method wherein after a pilot pipe is reamed by an advancing device arranged at a starting part on a ground as a track is controlled, the pilot pipe is linearly advanced, and an advancing pipe and a burying pipe are advanced in a spreading manner as the pipes are guided by the pilot pipe. CONSTITUTION: When a burying pipe 3, such as a collecting pipe, to improve the foundation ground 20 of an existing structure 19 is laid in a non-excavated manner in a ground, a starting part is set on one side of the existing structure 19. An advancing device 22 is coupled to a reaction force pile and a base bed 24 is installed in such a manner to be inclined at a given angle with a ground surface. An advance carriage 25 is reciprocated along the base bed 24 by a hydraulic means to first advance in a curved manner a pilot pipe 1 and an advancing pipe 2 and secondly linearly advance the pipes, and the burying pipe 3 is drawn by the advancing pipe 2. The advancing pipe 2 has a front end part to which a water jet type reaming mechanism 4 is fixed, and reaming advancing is effected by injecting sludge through a number of nozzles arranged at a front panel.

6. 发明专利

JPH10286557A METHOD FOR RECOVERING CONTAMINANT PRIMARY LOCATION FROM CONTAMINATED SOIL TO GROUND AT ITS 失效
公开(公告)号：JPH10286557A
公开(公告)日：1998-10-27
申请号：JP11177197
申请日：1997-04-15
申请人： NIPPON STEEL CORP
发明人： HASEGAWA HISASHI , GUNJI SHIGERU , TATSUHARA TAKESHI , UEMATSU NOBUYUKI
IPC分类号： E02D3/11 , B09C1/00 , B09C1/04
摘要： PROBLEM TO BE SOLVED: To provide a method for recovering contaminants at its the primary location for recovering effectively the contaminants in soil which can be easily applied to the contaminated soil lying under an existing structure. SOLUTION: Pipes 4 and 5 to be laid by the bending excavation from the ground are set almost horizontally in soil 1 contaminated with harmful contaminants, and the contaminants in the soil are separated in the original site by using the pipes 4 and 5 and the like and recovered onto the ground. As a means for separating the contaminants, a plurality of power-applicable pipes 4 and 5 to be laid by the bending excavation from the ground are set in parallel almost horizontally at intervals L in the ground 1 contaminated with harmful contaminants, and one of the pipes 4 and 5 is used as a water collecting pipe 4 with a number of water collecting holes, while the other pipe is used as a power applicable pipe 5 in the constitution of a pair of pipes or pairs of pipes. Direct current supplied from a direct current power source device 6 is applied to respective water collecting pipe or pipes 4 and the power applicable pipe or pipes 5 forming a pair or pairs, and contaminants collected together with clearance water from the contaminated soil 1 are collected into the water collecting pipe or pipes 4 by the electrical separation and recovered onto the ground. Also the contaminants can be recovered in the gaseous state.

7. 发明专利

JPH09268888A TUNNEL LINING METHOD USING COMPOSITE PANEL 失效
公开(公告)号：JPH09268888A
公开(公告)日：1997-10-14
申请号：JP9590896
申请日：1996-03-27
申请人： NIPPON STEEL CORP
发明人： TATSUHARA TAKESHI , KAKIZAKI MINORU , HASEGAWA HISASHI , GUNJI SHIGERU , TAKEUCHI TAKASHI
IPC分类号： E21D11/04 , E21D11/10 , E21D11/20
摘要： PROBLEM TO BE SOLVED: To provide a lining method using a panel which is capable of greatly reducing the panel weight in transportation and assembling to a site, excellent in the execution, capable of shortening the construction period, and which exhibits the excellent strength. SOLUTION: In this tunnel lining method, a composite panel 1 comprising one or a plurality of steel plates and concrete along the circumferential direction of a tunnel is used. Steel plates 4 of the composite panel 1 is a bent steel plate 4 which is corrugated in the longitudinal direction and provided with shear connector, the inside of the bent steel plate 4 is formed of precast concrete, and the outside of the bent steel plate 4 is formed of concrete poured after the assembly at site of the bent steel plate 4. The method can be served for a newly installed tunnel, and the secondary lining of an existing tunnel. Highly flowing concrete can be used for concrete to be poured after the assembly at site.

8. 发明专利

JPH10176488A LINING STRUCTURE FOR EXISTING TUNNEL 失效
公开(公告)号：JPH10176488A
公开(公告)日：1998-06-30
申请号：JP35374096
申请日：1996-12-18
申请人： NIPPON STEEL CORP
发明人： TATSUHARA TAKESHI , KAKIZAKI MINORU , ARAKAWA TAKASHI
IPC分类号： E21D11/00 , E21D11/10 , E21D11/18 , E21D11/38
摘要： PROBLEM TO BE SOLVED: To sufficiently prevent leakage arising from damages in an existing tunnel, to lighten the decrease in cross section at the inside of the tunnel after completion of lining, to make designing available for bearing earth load and overhead load only without sustaining water pressure of the leakage possible, and to make works executable safely in a short period of time at a low cost. SOLUTION: An arch member 2 made of steel plate is provided at a position along the upper circumferential wall 4 of an existing tunnel 1, and a side frame member 3 made of steel plate is arranged along the lower circumferential wall 5 connecting to the underside of the upper circumferential wall 4. The side frame 3 supports the arch member 2 with its upper end and is fixed to the lower bed 14 at its lower end. A space between the arch member 2 and the upper circumferential wall 4 is filled with water-permeable grouting material 8, and leakage through the upper circumferential wall 4 is made to pass through the water-permeable grouting material 8 and is discharged through the lower end of the arch member 2.

9. 发明专利

JPH08277522A PREVENTIVE WORK AGAINST LIQUEFACTION OF GROUND BELOW EXISTING STRUCTURE 失效
公开(公告)号：JPH08277522A
公开(公告)日：1996-10-22
申请号：JP10318195
申请日：1995-04-05
申请人： NIPPON STEEL CORP
发明人： SAITO TAKUYA , HASEGAWA HISASHI , TAKEUCHI TAKASHI , TATSUHARA TAKESHI
IPC分类号： E02D3/10 , E02D27/34
摘要： PURPOSE: To execute preventive measures against liquefaction of ground at a low cost and in a short time, by passing a curved guide through to insert it into the lower end of a slit hole provided on the ground surface at the periphery of one side of an existing structure and positioning an excavating pipe in an objective stratum for the improvement to drain water and decrease the underground water level. CONSTITUTION: A little larger slit hole 18 than the projected section of a curved guide pipe 5 is cut to the depth of an objective stratum 3a for improving in order to insert the curved guide pipe 5. In this case, struts and earth retaining for the slit hole 18 are simplified and the quantity of excavating soil is minimized. The curved guide pipe 5 is provided with a straight part 23 at the lower end and the excavating pipe 19 projected from the curved pipe is regulated in a specified thrusting direction to accurately thrust the excavating pipe into the improving stratum 3a. Water is drained through the excavated hole formed by the excavating pipe 19 or a stabilizing material of ground is charged in the excavated hole or the peripheral ground thereof to smoothly prevent liquefaction of the ground below an existing structure.

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