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1. 发明专利

JPS6425050A DETERIORATION JUDGING METHOD OF REINFORCED CONCRETE CONSTRUCTION 失效
公开(公告)号：JPS6425050A
公开(公告)日：1989-01-27
申请号：JP17990987
申请日：1987-07-21
申请人： PENTA OCEAN CONSTRUCTION
发明人： KOBORI MITSUNORI , TAKAGI KENJI , MORIMOTO TOSHIYA
IPC分类号： G01N27/00 , G01N27/26
摘要： PURPOSE:To make it possible to find and estimate the indication of the deterioration in a reinforced concrete construction at an early period accurately, by overlapping the distribution graph of natural potential and the distribution graph of resistivity, thereby judging the corroded area of reinforcing steel. CONSTITUTION:One terminal of a potentiometer 1 is connected to a steel piece (m) in a reinforced concrete construction M through a conductor 2. The other terminal thereof is connected to a reference electrode 3. Then, the reference electrode 3 is brought into contact with each measuring point, and the average natural potential (value obtained by averaging the measured potentials in a typical range) of all the measuring points is measured, and the potential distribution graph is formed. Resistivities are obtained as follows: four electrodes 5 are inserted in the surface layer part of the concrete surface (n), where the natural potential is measured; AC is conducted across the electrodes on both sides; a voltage across the two inner electrodes is measured; and the resistivity is obtained. A resistivity distribution graph is formed based on the result. It can be determined that the distribution graph of the part, where the corroding range of reinforcing steel in the potential distribution graph is overlapped on the corroding range of the steel in the resistivity graph, is the corroding region, where breakdown strength of the reinforcing steel is decreased.

2. 发明专利

JPS62290503A METHOD OF REDUCING PURE RELAXATION RATE OF STRETCHING MATERIAL MADE OF FIBER-REINFORCED COMPOSITE MATERIAL FOR PRESTRESSED CONCRETE 失效
公开(公告)号：JPS62290503A
公开(公告)日：1987-12-17
申请号：JP13381186
申请日：1986-06-11
申请人： PENTA OCEAN CONSTRUCTION
发明人： TAKAGI KENJI , NAITO HIDEHARU , OZAKI AKIRA , SATO YOSHITAKA
IPC分类号： B28B23/04

3. 发明专利

JPS61255808A METHOD OF KNEADING CONCRETE 失效
公开(公告)号：JPS61255808A
公开(公告)日：1986-11-13
申请号：JP9784985
申请日：1985-05-10
申请人： PENTA OCEAN CONSTRUCTION
发明人： TAKAGI KENJI , SOGA SHINYA , KIMURA ATSUSHI
IPC分类号： B28C7/12 , B28C5/00 , B28C7/02

4. 发明专利

JPS6080626A MULTI-STAGE STACKED CAISSON AND ITS CONSTRUCTION 失效
公开(公告)号：JPS6080626A
公开(公告)日：1985-05-08
申请号：JP18693583
申请日：1983-10-07
申请人： PENTA OCEAN CONSTRUCTION
发明人： KUSANO MORIO , TAKAGI KENJI , NAITOU HIDEHARU , OOHASHI SEIICHI , KIMURA ATSUSHI
IPC分类号： E02B3/06 , E02D23/00 , E02D23/02
摘要： PURPOSE:To make easier operations on site by a method in which an upper stage caisson is stacked up on a lower stage caisson, and a continued prestressed steel material is vertically thrust through the upper slab of the lower stage caisson and the bottom slab of the upper stage caisson and clamped tightly. CONSTITUTION:A lower stage caisson 1 with a float 15 is floated on water and then sunk to a given depth from water surface by charging water into the caisson 1. An upper stage caisson 3 is sunk onto the caisson 1 while charging water into the caisson 3, and the coupling projection 4 of the caisson 1 is fitted into the coupling recession 5 of the caisson 3. The bouyancy of the caisson 1 is increased while discharging water inthe caisson 1, and the caisson 3 is stacked up on the caisson 1. After discharging water from the caisson 3, a prestressed steel material 7 supported on the upper slab of the caisson 3 is thrust through the hole 22 of the bottom slab 3A of the caisson 3 and clamped fightly.

5. 发明专利

JPS57143010A METHOD FOR IMPROVING SOFT GROUND BY SAND DRAIN 失效
公开(公告)号：JPS57143010A
公开(公告)日：1982-09-04
申请号：JP2712281
申请日：1981-02-27
申请人： PENTA OCEAN CONSTRUCTION
发明人： YAMASHITA HIROMICHI , WATARI YOSHIHARU , MUTSURO HIDEAKI , TAKAGI KENJI
IPC分类号： E02D3/10
摘要： PURPOSE:To measure a loading effect to a soft soil layer in the case of the consolidation and dehydration of a soft ground and to enable generating of an enough excessive gap water pressure to the soft ground, by a method wherein a connection of a permeable sheet, of which a cylindrical bag is made of, is disconnected a few days after installation of the bag. CONSTITUTION:A sand pile 2 is surrounded with a cylindrical bag 3 made of a permeable sheet. The cylindrical gab 3 is formed such that a sheet is rolled in a cylinder, and the abutting parts are sewn together using thread which is produced such that, for example, short fibers are twisted together, an intertwisting part is loosened resulting from the elongation of the fibers due to penetration of water, and this results in reducing strength. Said sand pile 2 is formed in a soft layer 1, and sand mat 5 and additionally soil and sand 4 are placed as a loading weight. Said drain is conducted such that the connection of the bag loosens a few days after installation of it and this causes releasing of a peripheral restrain kept by the cylindrical bag 3.

6. 发明专利

JP2002348848A SOFT-GROUND IMPROVEMENT DEVICE 失效
公开(公告)号：JP2002348848A
公开(公告)日：2002-12-04
申请号：JP2001152880
申请日：2001-05-22
申请人： PENTA OCEAN CONSTRUCTION
发明人： IKUSHIMA TOSHIAKI , TAKAGI KENJI , KONDO TOSHIO , ISHII HIROSHI
IPC分类号： E02D23/08 , E02D3/02 , E02D3/10
摘要： PROBLEM TO BE SOLVED: To solve the defect that a caisson scale has had to enlarge owing to the prevention of the deformation of a caisson body due to external pressure in the case of the immersion of the caisson body in a conventional soft-ground improvement device. SOLUTION: In the soft-ground improvement device, a heavy article for penetration having rigidity and weight is connected detachably to the caisson body in which an underside is opened through a connecting means, and the caisson body is immersed into a soft ground at negative pressure. The connecting means is composed of eye plates installed to the caisson body and the heavy article for penetration, through-holes formed to both eye plates, connecting pins inserted into the through-holes, an L-shaped lever in which a base section is supported rotatably to the heavy article and pivot shafts connecting the lower-side lever of the L-shaped lever and the connecting pins, and the connecting pins are inserted or detached into or from the through-holes of the eye plates by operating the upper-side lever of the L-shaped lever. A plurality of the connecting means are used, each L-shaped lever of the connecting means is coupled mutually by a common connecting rod, and others are operated simultaneously by operating arbitrary one of the L-shaped levers.

7. 发明专利

JP2535177B2 失效
公开(公告)号：JP2535177B2
公开(公告)日：1996-09-18
申请号：JP17990987
申请日：1987-07-21
申请人： PENTA OCEAN CONSTRUCTION
发明人： KOBORI MITSUNORI , TAKAGI KENJI , MORIMOTO TOSHA
IPC分类号： G01N27/00 , G01N27/26

8. 发明专利

JPS6353326B2 失效
公开(公告)号：JPS6353326B2
公开(公告)日：1988-10-24
申请号：JP22508382
申请日：1982-12-23
申请人： PENTA OCEAN CONSTRUCTION
发明人： KUSANO MORIO , TAKAGI KENJI , SATO YOSHITAKA
IPC分类号： E02D3/00 , E02D3/02 , E02D3/10

9. 发明专利

JPS6330443B2 失效
公开(公告)号：JPS6330443B2
公开(公告)日：1988-06-17
申请号：JP22508482
申请日：1982-12-23
申请人： PENTA OCEAN CONSTRUCTION
发明人： KUSANO MORIO , TAKAGI KENJI , SATO YOSHITAKA
IPC分类号： B65B3/12 , E02B3/12 , E02D3/00 , E02D3/10

10. 发明专利

JPS57209332A CAISSON SETTING WORK 失效
公开(公告)号：JPS57209332A
公开(公告)日：1982-12-22
申请号：JP9149581
申请日：1981-06-16
申请人： PENTA OCEAN CONSTRUCTION
发明人： WATARI YOSHIHARU , TAKAGI KENJI , KATAYAMA HAJIME
IPC分类号： E02D23/02 , E02D23/16
摘要： PURPOSE:To eliminate the need for a large-scale device for constructing a rubble mound by a method in which a space is provided in the central portion of the bottom of a caisson, an air-tight film is closely adhered to the inside of the space, the caisson is set in a temporarily caisson receiving portion on the rubble mound, and then cement mortar is injected into the film. CONSTITUTION:Rubble is charged onto a foundation ground under water to form a rubble mound 2 having a caisson temporarily receiving portion 3. When towing a caisson A whose bottom is provided with a film 10, air is evacuated through a charging and discharging hole 8 to produce a vacuum between the caisson bottom the film and thereby to closely adhere the film to the inner wall of the space a, and a temporarily receiving projection 6 for the caisson A is set on the temporarily receiving portion 3 of the rubble mound 2. The reduced pressure condition of the charging and discharging hole 8 is released and then cement mortar is injected into the charging and discharging hole 8' at the central part until the cement mortar 13 is packed between the caisson A bottom and the film 10, whereupon the film is expanded and contacted closely with the upside of the rubble mound 2.

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