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11. 发明专利

JPH0617570B2 失效
公开(公告)号：JPH0617570B2
公开(公告)日：1994-03-09
申请号：JP28312087
申请日：1987-11-11
申请人： PENTA OCEAN CONSTRUCTION
发明人： FUJIWARA TOSHIMITSU , MITSUFUJI MASAAKI , KAJITANI TAKUMI , YOSHIMURA MASARU
IPC分类号： E02D3/10

12. 发明专利

JPH01127717A PREVENTING WORK FOR LIQUIDIZING OF SANDY GROUND 失效
公开(公告)号：JPH01127717A
公开(公告)日：1989-05-19
申请号：JP28312187
申请日：1987-11-11
申请人： PENTA OCEAN CONSTRUCTION
发明人： FUJIWARA TOSHIMITSU , MITSUFUJI MASAAKI , KAJITANI TAKUMI , YOSHIMURA MASARU
IPC分类号： E02D3/08 , E02D3/10
摘要： PURPOSE:To raise the draining function of water by a method in which a specific structure of belt-like drain is set in a gravel drain to form a composite drain. CONSTITUTION:A belt-like drain 1 is made up of water-permeable material 2 having mutually facing water-permeable wide plates 2A of a nearly rectangular cross section and a nonwoven fabric material 3 covering the surface of the material 2. The drain 1 is set in a gravel drain 16 to form a composite drain 17. The draining function of water can thus be enhanced.

13. 发明专利

JPH07158084A LIQUEFACTION PREVENTION METHOD FOR SUBSOIL 失效
公开(公告)号：JPH07158084A
公开(公告)日：1995-06-20
申请号：JP33904493
申请日：1993-12-03
申请人： PENTA OCEAN CONSTRUCTION
发明人： FUJIWARA TOSHIMITSU , HAYASHI KENTARO , KOISHIKAWA ISAO
IPC分类号： E02D3/12 , E02D3/10 , E02D5/18 , E02D27/34
摘要： PURPOSE:To ensure the proper prevention of the liquefaction of subsoil by pumping up ground water from the bottom of the subsoil surrounded with a water barrier wall, filling a consolidating agent solution only over the time when the solution infiltrates from the upper section of the subsoil to the bottom thereof, and adjusting the gel time of the solution to a value corresponding to the filling time. CONSTITUTION:Ground water is pumped up from the bottom section of the subsoil of an existing structure 1 surrounded with a water barrier wall 2 via a deep well 4 and a discharge pipe 5. Then, the central upper section of the subsoil 3 is filled with a consolidating agent via a consolidating agent filling tube 9. Also, a distance from the end of the tube 9 to the bottom section of the subsoil 3 for improvement is measured, and a time for the agent to infiltrate in the bottom section of the subsoil 3 is found from an infiltration distance- filling time table established in advance via an experiment or the like. The agent is supplied only over the time so obtained. Furthermore, the gel time of the agent is determined, so as to correspond to the filling time, and the volume of the agent is adjusted to meet the gel time.

14. 发明专利

JPH0197715A PAPER DRAINING MATERIAL FOR GROUND IMPROVEMENT 失效
公开(公告)号：JPH0197715A
公开(公告)日：1989-04-17
申请号：JP25249187
申请日：1987-10-08
申请人： PENTA OCEAN CONSTRUCTION , DAINIPPON PLASTICS
发明人： FUJIWARA TOSHIMITSU , YOSHIMURA MASARU , MIYASHITA KIYOSHI , SUMIYAMA NOBUHIDE
IPC分类号： E02D3/10
摘要： PURPOSE:To improve the water permeability of the ground by a method in which both water pass plates are partitioned by a number of ribs to form a number of water paths. CONSTITUTION:Both water pass plates 1A of a rectangular cross section with mutually facing wide faces are partitioned by a number of ribs 1C at an interval in the widthwise direction to form a number of parallel water paths 1B connected in the longitudinal direction in a waterway material 1. A necessary size of waterway can thus be secured.

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