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1. 发明专利

JP2002054131A SOIL IMPROVING STRUCTURE AND SOIL IMPROVING METHOD CAPABLE OF CONTROLLING PERIPHERAL GROUND DISPLACEMENT 失效
公开(公告)号：JP2002054131A
公开(公告)日：2002-02-20
申请号：JP2000243618
申请日：2000-08-11
申请人： HAZAMA GUMI , KAJITANI ENGINEERING KK , MARUYAMA KOGYO
发明人： KOGA AKIHIRO , ONO MUTSUO , ISHIHARA MASAAKI , SHIMA HIROYASU , NAKAKUMA KAZUYOSHI
IPC分类号： E02D3/10
摘要： PROBLEM TO BE SOLVED: To suppress and control horizontal displacement and ground settlement occurring in the ground on the periphery of an area targeted for improvement. SOLUTION: A plurality of drain materials 16 are almost vertically driven into the area 13 targeted for improvement with their head portions extended above the ground surface, and a vacuum pump 15 is connected to the head portions of the respective the drain materials via a horizontal drain material 12. Then, the drain materials and the horizontal drain material are hermetically coated with a sheet material 11, and a wall body or a groove is constructed along the drain materials in the ground on the periphery of the area targeted for improvement. Further, tiltemeters 18 for measuring horizontal displacement are set at the wall body or the groove, and the peripheral ground. While the horizontal displacement at stations are measured, the vacuum pump is driven to introduce and drain water from the drain materials via the horizontal drain material to the vacuum pump, and loading fill 14 is piled up on the sheet material, depending on fluctuations of the deformation, to thereby control the horizontal deformation.

2. 发明专利

JP2000154525A SOFT GROUND IMPROVING METHOD IN COLD DISTRICT 失效
公开(公告)号：JP2000154525A
公开(公告)日：2000-06-06
申请号：JP32952998
申请日：1998-11-19
申请人： MARUYAMA KOGYO , HAZAMA GUMI , KAJITANI ENGINEERING KK
发明人： NAKAKUMA KAZUYOSHI , KOGA AKIHIRO , ISHIHARA MASAAKI , ONO MUTSUO , SHIMA HIROYASU
IPC分类号： E02D3/00 , E02D3/10 , E02D31/14
摘要： PROBLEM TO BE SOLVED: To provide an improving method for soft ground capable of providing satisfactory construction efficiency and suppressing equipment cost. SOLUTION: This improving method for soft ground has a pretreatment process in which first water passing materials 12, 13 communicating with a first pump are arranged on a surface of the ground to be improved before a cold season comes, the water passing materials are covered with a first sheet 11, a negative pressure condition is created under the sheet by the pump to pump up underground water, and the underground water is maintained in the ground of a surface layer to be improved until a cold season comes to prevent freezing of the surface layer ground. Furthermore, it is composed of a process in which ground for construction 20 is prepared on the first sheet after the pretreatment process, a process in which a drain material 28 is placed in substantially vertical direction on the ground for construction, a process in which a second water passing material 23 is arranged on the ground for construction, a process in which a second sheet 21 is spread, a process in which a pump 25 communicating with the second water passing material is arranged, and a process in which water and gas in the ground are discharged by the pump.

3. 发明专利

JP2001311136A GROUND IMPROVEMENT STRUCTURE AND CONSTRUCTION METHOD 失效
公开(公告)号：JP2001311136A
公开(公告)日：2001-11-09
申请号：JP2000131205
申请日：2000-04-28
申请人： HAZAMA GUMI , MARUYAMA KOGYO , KAJITANI ENGINEERING KK
发明人： KOGA AKIHIRO , MATSUMOTO KOUKI
IPC分类号： E02D3/10
摘要： PROBLEM TO BE SOLVED: To provide a ground improvement structure capable of accelerating consolidation settlement and reducing construction period and cost even if a live load such as a fill is not imposed. SOLUTION: An objective range for ground improvement is constituted of a pumping section 21 and a draining section 20. In the draining section, a plurality of drain members 15 are provided so that the upper end does not communicate with the outside air and the lower end reaches a permeable layer below the objective improvement ground. Meanwhile, in the pumping range, a plurality of pumping drain members 16 are provided so that the upper end extends above the objective improvement ground and the lower end reaches the permeable layer. A permeable member 12a and a hollow pipe 12b for leading water from the upper end of the drain member to a specified position are arranged so as to keep contact with the upper end of the pumping drain member, and a sheet member 11 covering air-tightly the upper end of drain members and a water collecting meams is laid, and further, a vacuum pump 17 is installed to communicate with the water collecting means.

4. 发明专利

JP2000104241A AIRTIGHT STRUCTURE IN VACUUM CONSOLIDATION METHOD AND AIRTIGHT SHEET EMBEDDING METHOD 失效
公开(公告)号：JP2000104241A
公开(公告)日：2000-04-11
申请号：JP27358798
申请日：1998-09-28
申请人： HAZAMA GUMI , MARUYAMA KOGYO , KAJITANI ENGINEERING KK
发明人： KOGA AKIHIRO , ONO MUTSUO , MATSUMOTO KOUKI , NAKAKUMA KAZUYOSHI , SHIMA HIROYASU , NAKAGAWA SUNAO
IPC分类号： E02D3/00 , E02D3/10
摘要： PROBLEM TO BE SOLVED: To ensure the airtightness at an end part of an airtight sheet and to easily keep it by embedding the airtight sheet end part into a groove filled with the fluid. SOLUTION: An airtight sheet 2 is placed on a horizontal drain material 3, a fluid 4 is packed in a groove 5 formed on the ground to be improved 40, and an end part 2a of the airtight sheet is embedded in the fluid 4. To embed the end part of the airtight sheet, the water, bentonite muddy water or the like is jetted from a neighborhood of a point of a digging device while digging the ground to be improved 40 by the digging device such as a multi-shaft auger or the like for stirring and mixing the same with the sediment of the ground to be improved, and the airtight sheet 2 is pressed in the stirred and mixed zone by a specific depth. The airtight sheet 2 is manually pressed into the fluid 4 by fixing a locking tool on a point of a rod. That is, the end part of the airtight sheet is back filled by the muddy water, so that the airtightness can be improved, the degree of vacuum can be increased, the consolidation of the ground to be improved can be promoted, and the effect on ground improvement can be increased.

5. 发明专利

JP2000054358A VACUUM CONSOLIDATION YARD FORMING EQUIPMENT AND FORMING METHOD 失效
公开(公告)号：JP2000054358A
公开(公告)日：2000-02-22
申请号：JP22478598
申请日：1998-08-07
申请人： HAZAMA GUMI , MARUYAMA KOGYO , KAJITANI ENGINEERING KK
发明人： KOGA AKIHIRO , ONO MUTSUO , MITANBATA ISAMU , CHIMOKU HIDETOMO , NAKAKUMA KAZUYOSHI , SHIMA HIROYASU
IPC分类号： E02D3/12 , E02D3/00 , E02D3/02
摘要： PROBLEM TO BE SOLVED: To provide equipment capable of performing vacuum consolidation yard forming process from the driving of drain members to the laying of airtight sheet. SOLUTION: Provided are a drain driving machine 10 capable of running on soft ground and a work carriage 20 towed by the drain driving machine 10; a work vehicle is equipped with a crawler type base machine 11 having a vuoyancy tank, a mandrel 12 and a leader 13 for driving the drain member into soft ground, an arm 15 and a boom 16 for supporting the leader 13 with a variable angle, and a paper reel 18a for supplying drain members to the mandrel 12. And the work carriage has a sled 27 supporting the carriage on soft ground and carries water passing members and airtight sheets 21 and working scaffolds 25, 23, 26 are respectively provided for drive work for drain members installation work for water passing members and laying work for airtight sheets.

6. 发明专利

JP2000160543A SOLUBLE VERTICAL DRAIN MATERIAL AND SOFT GROUND IMPROVING METHOD USING THE SAME 失效
公开(公告)号：JP2000160543A
公开(公告)日：2000-06-13
申请号：JP33523298
申请日：1998-11-26
申请人： MARUYAMA KOGYO , HAZAMA GUMI , KAJITANI ENGINEERING KK
发明人： NAKAKUMA KAZUYOSHI , KOGA AKIHIRO , MAEDA TERUNOBU , ONO MUTSUO , SHIMA HIROYASU
IPC分类号： E02D3/10
摘要： PROBLEM TO BE SOLVED: To improve the soft ground by constructing vertical drain materials placed in the ground to be improved at a specified interval of soluble material which is dissolved through the contact with a dissolving agent, and dissolving it if necessary. SOLUTION: A synthetic resin net 12 is formed by erecting a flat plate shaped synthetic resin wire materials 12b orthogonal to a flat plate shape synthetic resin wire materials 12a similar thereto, and connecting them at their cross points. The net 12 is covered with nonwoven cloth 13 to keep air passages for preventing generation of clogging, and thereby a soluble vertical drain materials 11 are formed. In this case, the net 12 and the cloth 13 are dissolved at a time by bringing the net 12 into contact with caustic soda. By placing the materials 11 into the ground to be improved, the verical drainage column can be constructed. The water and air contained in the ground to be improved between the columns are sucked up onto the ground to be improved through the drainage passage of the materials 11, thereby improving the ground. With this method, the management of work period can be performed surely.

7. 发明专利

JP2000144706A SOFT GROUND STABILIZATION 失效
公开(公告)号：JP2000144706A
公开(公告)日：2000-05-26
申请号：JP31522598
申请日：1998-11-06
申请人： MARUYAMA KOGYO , HAZAMA GUMI , KAJITANI ENGINEERING KK
发明人： SHIMA HIROYASU , NAKAKUMA KAZUYOSHI , KOGA AKIHIRO
IPC分类号： E02D3/10
摘要： PROBLEM TO BE SOLVED: To improve a soft ground efficiently into a hard one even in a deep section by loading vacuum pressure in to an improved ground through a vertical drain material and a water-conveyance material connected to the vertical drain material. SOLUTION: The load of vacuum pressure is continued from a vacuum pump 12 through a water-conveyance material 14 so that the insides of vertical drain materials 11 reach 0.4 atmospheric pressure or less, the whole region of an improved ground A is used as a decompression region and the increase of consolidation and strength is promoted, cracks C are generated from the deformation of boundary sections B1 among the ground A and non-improved grounds B, and the decompression region isolated from peripheral sections is manufactured in the improved ground A. Accordingly, not only the improved ground but also a deep section exceeding 20 m are consolidated surely and the increase of strength is promoted, and a hard ground can be improved efficiently. The ground can be improved more efficiently by the covering of the top face of the improved ground A with a synthetic-resin film prior to the load of vacuum pressure, the installation of a cut-off wall 15 to the peripheral section of the improved ground A, intermittent decompression load, load continuation after the generation of the decompression region, or banking or the like before and after the preparation of the decompression region.

8. 发明专利

JP2000104242A VACUUM CONSOLIDATION YARD FORMING DEVICE AND METHOD 失效
公开(公告)号：JP2000104242A
公开(公告)日：2000-04-11
申请号：JP27829298
申请日：1998-09-30
申请人： HAZAMA GUMI , MARUYAMA KOGYO , KAJITANI ENGINEERING KK
发明人： KOGA AKIHIRO , CHIMOKU HIDETOMO , ONO MUTSUO , MITANBATA ISAMU , NAKAKUMA KAZUYOSHI , SHIMA HIROYASU
IPC分类号： E02D3/00 , E02D3/10 , E02D15/08
摘要： PROBLEM TO BE SOLVED: To provide a device which can be executed a vacuum pressure close yard formation process from installing of a drain material to laying of an airtight sheet, in the soft ground in water. SOLUTION: This device is provided with a worktable 13 which floats on water, and a crawler 12 for moving the worktable 13 on the water in a desired direction. Moreover the worktable is provided with a drain material installing machine 11 for driving a drain material 20 to a soft ground 28 in water in a nearly vertical direction, a working stage for installing water flowing materials 21, 24 for passing water and gas from the drain material 20 in a nearly horizontal direction, and a back hoe 26 used when an airtight sheet 23 is laid down on the water flowing materials 21, 24.

9. 发明专利

JP2000054357A AIR-TIGHT SHEET AND GROUND IMPROVEMENT USING THE SAME 失效
公开(公告)号：JP2000054357A
公开(公告)日：2000-02-22
申请号：JP22557498
申请日：1998-08-10
申请人： HAZAMA GUMI , MARUYAMA KOGYO , KAJITANI ENGINEERING KK
发明人： KOGA AKIHIRO , ONO MUTSUO , NAKAKUMA KAZUYOSHI , SHIMA HIROYASU
IPC分类号： E02D3/00
摘要： PROBLEM TO BE SOLVED: To facilitate consolidation of ground by providing bag bodies in which a liquid material or a fluid material can be filled, at the ends of one or more sides of a sheet. SOLUTION: An air-tight sheet 10 is made rectangular and bag bodies 12 are formed at the four peripheral sides so as to surround the sheet 11 at the whole length, and charging/discharging openings 13 for liquid or fluid are formed at specified positions of the bag bodies 12. Further, partition walls are formed in the bag bodies 12 if necessary. The bag bodies 12 are embedded in the ground to lay the air-tight sheet 10, and in the state that the bag bodies 12 are embedded in the ground, liquid or fluid is injected in the bag bodies 12. In this way, when the bag bodies 12 of the air-tight sheet 10 are embedded in the ground, cohesive soil presses the surface of the bag bodies 12 and closely sticks thereto. Accordingly, when liquid is injected in the bag body in a state pressed by the cohesive soil, the bag body is more closely stuck to the cohesive soil, and the air-tightness can be securely obtained to promote consolidation.

10. 发明专利

JP2003166233A GROUND IMPROVEMENT STRUCTURE AND CONSTRUCTION METHOD BY VACUUM CONSOLIDATION 审中-公开
公开(公告)号：JP2003166233A
公开(公告)日：2003-06-13
申请号：JP2001364564
申请日：2001-11-29
申请人： HAZAMA GUMI , AOYAMA KIKO CO LTD
发明人： KOGA AKIHIRO , KUMAMOTO HARUO
IPC分类号： E02D3/10 , E02D3/02
摘要： PROBLEM TO BE SOLVED: To provide a ground improvement structure and construction method capable of preventing the energy loss caused by draining, to a minimum even if the ground surface is slanted due to subsidence of an objective base ground. SOLUTION: The ground improvement structure is provided with a plurality of vertical drains substantially vertically driven in the objective zone, horizontal drains 2 and collecting tubes 4 with holes installed so as to communicate with the head of these drains, a collecting container 14 put in a position or the vicinity expected to become maximum in the subsidence caused by the ground improvement, a sheet member 1 airtightly covering the improved objective zone together with cavities, the head of plural drain members, horizontal drains and holed collecting tubes, a drain pump 15 to discharge water collected in the cavities to the outside of the sheet member, and a vacuum pump 6 communicating with the cavities to apply a negative pressure to the improved objective ground airtightly covered with the sheet member. COPYRIGHT: (C)2003,JPO

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