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1. 发明专利

JPH0641942A DRIVING METHOD FOR DRAIN MEMBER 失效
公开(公告)号：JPH0641942A
公开(公告)日：1994-02-15
申请号：JP21750092
申请日：1992-07-24
申请人： PENTA OCEAN CONSTRUCTION , GOEI SANGYO KK
发明人： FUJIWARA TOSHIMITSU , HIGUCHI YOHEI , TANAKA AYUMI
IPC分类号： E02D3/10
摘要： PURPOSE:In the case where the ground is improved using a drain member before and after underground excavation, to make the excavating work more effective without hindrance caused by the drain member in the excavation work. CONSTITUTION:A drain member 1 connected through a synthetic resin connecting member 2 which is cut to proper length and can be cut under low tensile force, namely 30 to 50kgf, is driven to a prescribed depth in the soft ground M. After that, the tensile force is applied to the drain member 1 on the ground surface to cut it for driving it.

2. 发明专利

JPH01125415A PREVENTING WORK FOR LIQUEFACTION OF GROUND BY BANDED DRAIN MATERIAL 失效
公开(公告)号：JPH01125415A
公开(公告)日：1989-05-17
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
摘要： PURPOSE:To prevent the liquefaction of the ground by a method in which a banded drain material formed by covering a water-passing material having may water paths connected in the longitudinal direction in parallel between its water-passing plates with a nonwoven fabric is driven into sandy ground. CONSTITUTION:The surface of a water-passing material 2 having mutually facing wide faces as water-passing plate faces 2A, with a nearly rectangular cross section, is covered with a nonwoven fabric 3 to make up a banded brain material 1. In the material 2, a number of water paths 2B connected in the longitudinal direction are formed in parallel dividedly by many ribs 2C, and many water holes 2E are formed in many grooves 2D formed in the plate face 2A. The drain material 1 is driven into sandy ground to discharge water in the ground and also to drain excess void water during earthquake.

3. 发明专利

JPH11336064A METHOD AND DEVICE FOR BURYING DRAIN MATERIAL 失效
公开(公告)号：JPH11336064A
公开(公告)日：1999-12-07
申请号：JP14375098
申请日：1998-05-26
申请人： PENTA OCEAN CONSTRUCTION
发明人： FUJIWARA TOSHIMITSU , MATSUSHITA HIROSHI
IPC分类号： E02D3/10
摘要： PROBLEM TO BE SOLVED: To reduce formation of a water channel due to passage of a drain material inserter and damage, etc., to a plant of a surface layer when a drain material is to be buried horizontally into soft soil. SOLUTION: Downward guide sections B (rollers 24, 25, 25..., 26) holding the long-sized flat plate-shaped drain materials 5 under the state, in which broader surfaces are directed to the left and the right, and guiding the drain materials 5 to lower sections and backward forwarding sections C (rollers 26, 27) twisting the drain materials 5 under the state, in which the broader surfaces are directed vertically, and forwarding the drain materials 5 to rear sections are installed onto the side faces of a flat plate-shaped frame 21, and the breadth of a drain material inserter 20 is formed at a small value. When the drain material inserter 20 is inserted into soft soil 0 from a working craft 10 and the working craft 10 is advanced while backwards forwarding the drain materials 5 from the drain material inserter 20 and the drain materials 5 are buried while the broader surfaces are directed vertically and extended in the horizontal direction into soft soil 0, the disturbance of soft soil 0 due to the passage of the drain material inserter 20 can be inhibited.

4. 发明专利

JPH0933465A APPARATUS FOR MEASURING CONTENT OF CEMENT, ETC. 失效
公开(公告)号：JPH0933465A
公开(公告)日：1997-02-07
申请号：JP18576295
申请日：1995-07-21
申请人： UNYUSHO KOWAN GIJUTSU KENKYUSH , JAPAN DEV & CONSTRUCTION , OHBAYASHI CORP , TOA HARBOR WORKS CO LTD , PENTA OCEAN CONSTRUCTION , TOYO CONSTRUCTION , NIKKEN KK
发明人： ZEN KOUKI , NINOMIYA KOJI , KUBO HIROSHI , KAWACHI TAKESHI , SHIMA MASANORI , FUJIWARA TOSHIMITSU , FURUKAWA YOSHIO , SAKANO TAMOTSU
IPC分类号： E02D3/12 , G01N25/20 , G01N25/48 , G01N33/24
摘要： PROBLEM TO BE SOLVED: To measure a content of cement or the like in a soil, by distributing and mixing hydrochloric acid to a storing means storing a fixed amount of soil and detecting a temperature rise of the soil due to the mixing. SOLUTION: A fixed amount of a soil S containing cement of an unknown kind and a known content is stored in a Dewar flask. Valves 62a, 64a, 66a of a distribution means 6 are opened/closed by manipulating an operation panel 10. A predetermined amount of hydrochloric acid H is distributed to the Dewar flask 5 from a hydrochloric acid tank 4. Then, a stirring motor 71 is driven to rotate a stirring vane 73 thereby to mix/stir the soil S and hydrochloric acid H in the flask 5. The soil is raised in temperature by a reaction heat. A balance temperature display device 11 displays a temperature of the hydrochloric acid H detected by a balance temperature sensor 8, and a reaction temperature display device 12 displays a maximum value of a reaction temperature detected by a reaction temperature sensor 9. An operator obtains an increased temperature as a difference of display temperatures of the display devices 11 and 12, and detects a content of cement of the soil S with reference to a preliminarily obtained graph of the content and increased temperature.

5. 发明专利

JPH0665914A GROUND COMPACTION METHOD 失效
公开(公告)号：JPH0665914A
公开(公告)日：1994-03-08
申请号：JP24012692
申请日：1992-08-18
申请人： PENTA OCEAN CONSTRUCTION
发明人： FUJIWARA TOSHIMITSU , KOISHIKAWA ISAO , KITAMOTO TOSHIO , SHIRAKAMI KATSUAKI
IPC分类号： E02D3/08 , E02D3/10
摘要： PURPOSE:To enhance the effect of ground compaction by casting drain materials into a soft ground at a proper span and then pressing in penetration rods around the drain materials and discharging pore water. CONSTITUTION:The surface of a water porous material 2, which is made of synthetic resin, such as vinyl chloride, is covered with a filter 3, thereby forming a belt-shaped drain material 1a. The belt-shaped drain materials 1a are cast into a weak ground 4 at a proper span. Steel-made penetration rods 5 are pressed in around the surfaces of the belt-shaped drain materials 1a, which forces the ground to be deformed to such an extent equivalent to the cubic volume of the penetration rods 5. This deformation quantity can be absorbed by the removal of earth to the earth surface and volumetric changes in the ground. However, since the penetration rods 5 are injected statically and gradually, there is virtually no removal of earth to the earth surface and this energy is absorbed by the volumetric changes in the ground. More specifically, the excess pore water generated in the ground by the volumetric changes is collected into the belt-shaped drain materials 1a and the collected water is discharged to the earth surface.

6. 发明专利

JPH0577807B2 失效
公开(公告)号：JPH0577807B2
公开(公告)日：1993-10-27
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

7. 发明专利

JPS6337205B2 失效
公开(公告)号：JPS6337205B2
公开(公告)日：1988-07-25
申请号：JP16981682
申请日：1982-09-30
申请人： PENTA OCEAN CONSTRUCTION
发明人： YANO KOICHIRO , FUJIWARA TOSHIMITSU
IPC分类号： E02D3/12 , E02D3/00 , E02D3/02

8. 发明专利

JPS63142115A PREVENTION WORK FOR LIQUEFACTION OF GROUND 失效
公开(公告)号：JPS63142115A
公开(公告)日：1988-06-14
申请号：JP28893186
申请日：1986-12-05
申请人： PENTA OCEAN CONSTRUCTION
发明人： YANO KOICHIRO , FUJIWARA TOSHIMITSU , MITSUFUJI MASAAKI , KAJITANI TAKUMI , YOSHIMURA MASARU
IPC分类号： E02D3/08
摘要： PURPOSE:To prevent the rise of excess void water pressure in improved ground by interrupting the inflow of permeating water from unimproved ground into the improved ground by a method in which a water-impermeable wall is provided in the boundary between the improved ground and the unimproved ground. CONSTITUTION:A water-impermeable wall 4 formed of a water-impermeable film of vinyls, etc., or by injection of chemical grout, or by using thin sheet piles or concrete continuous underground wall is provided on both sides of unimproved ground 2 consisting of loose sand layer on the bearing ground 3. The lower end of the wall 4 is supported on the ground 3 and the upper end is connected with connectors 5. The unimproved ground section whose both ends are partitioned by the walls 4 is improved by compaction work, etc., to an improved ground 1. A mound 6 is constructed on the ground 1 and a jetty 7 is constructed on the mound 6. The inflow of permeating water from the unimproved ground 2 to the improved ground 1 can thus be interrupted to prevent the lowering of the shear strength of the improved ground 1.

9. 发明专利

JPH07158051A GROUND LIQUEFACTION PREVENTING METHOD 失效
公开(公告)号：JPH07158051A
公开(公告)日：1995-06-20
申请号：JP33906893
申请日：1993-12-03
申请人： PENTA OCEAN CONSTRUCTION
发明人： FUJIWARA TOSHIMITSU , HAYASHI KENTARO
IPC分类号： E02D3/12 , E02D3/10 , E02D5/18 , E02D27/34
摘要： PURPOSE:To prevent the liquefaction of a ground surely even on the ground right beneath an existing structure by pumping up ground-water from the bottom of the ground and filling a solidifier solution into the ground together with air. CONSTITUTION:Water shield walls 2 such as continuous soil walls, etc., are constructed around the ground to be improved from a ground surface to a desired depth. Also ground-water is pumped up from a ground 3 at the bottom of an existing structure 1 through a deep well 4 and a water drain pipe 5. At the same time, an under-water level 6 is lowered. Next slurry cement solidifier and solvent type solidifier are filled into the ground 3 together with air through a solidifier filling pipe 9. For cement system solidifier, a permeable ultra-fine particle cement is used. The solvent type solidifier is used after distillation so as to improve permeability. Then the ground strength is controlled by the amount of permeability of the solidifier. Since air remains between the solidifiers together with water after gathering water, liquefaction resistance can be further increased.

10. 发明专利

JPH07158045A GROUND LIQUEFACTION PREVENTING METHOD 失效
公开(公告)号：JPH07158045A
公开(公告)日：1995-06-20
申请号：JP33907393
申请日：1993-12-03
申请人： PENTA OCEAN CONSTRUCTION
发明人： FUJIWARA TOSHIMITSU , KOISHIKAWA ISAO
IPC分类号： E02D3/10
摘要： PURPOSE:To make a liquefaction preventing work easily even for air permeable ground without using significant building such as banking by deaerating the upper surface of the ground surrounded by shield walls. CONSTITUTION:Air unpermeable and water unpermeable shield walls 2 (for example, sheet pile, soil continuous wall) are constructed around a ground 1 to be improved to a specified depth from a ground surface. Also the upper surface of the ground 1 surrounded by the shield walls 2 is deaerated. Namely a pressure inside the ground 1 is reduced through an air collecting pipe 5. At the same time, a load is applied on the surface of the ground 1 by the atmosphere. As required, before or after a pressure inside the ground is reduced, or simultaneously, underground water inside the ground 1 is pumped up from a deep well 8 arranged at the bottom of the ground 1 through a lifting pipe 9. Thus liquefaction in the ground 1 can be prevented.

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