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1. 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.

2. 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.

3. 发明专利

JPH05148833A COMPACTION BY VIBRATION 失效
公开(公告)号：JPH05148833A
公开(公告)日：1993-06-15
申请号：JP31080991
申请日：1991-11-26
申请人： HAZAMA GUMI
发明人： NISHI KUNIO , TAKIZAWA YUKINOBU
IPC分类号： E02D3/046 , E02D3/10
摘要： PURPOSE:To enable compaction efficiently in response to the status of the ground to be compacted by the directivity, isotropy, etc., of the direction of vibrational distribution by adjusting the difference, phase difference, etc., of the direction by the motion of a weight mass and controlling the direction of vibrational distribution. CONSTITUTION:A plurality of exciters 13 vibrated by shell bodies transmitting vibrations over the outer circumferential ground, weight masses rotatably supported, rotation-energized hydraulic motors, etc., are installed at the front ends of each rod 11. Each rod is penetrated into the ground while the peripheral ground is compacted by jet water ejected from the front ends of each rod 11 and the vibrations of each exciter 13. Fillers 12 such as sand, crushed sand, etc., are charged while each rod is drawn as the filters 12 charged are compacted by vibrations. An encoder mounted to the hydraulic motor detects the angle of rotation at that time, and the direction of the vibrational distribution of the vertical and rotary motions of the weight masses such as the difference of the directions, phase difference, etc., through a computing element. When drawing is completed, the column bodies of the fillers 12 compacted are formed into the ground, thus improving the ground such as the loose sand ground.

4. 发明专利

JPS63284308A CRUSHED STONE PILE AND ITS CONSTRUCTION 失效
公开(公告)号：JPS63284308A
公开(公告)日：1988-11-21
申请号：JP11912787
申请日：1987-05-18
申请人： HAZAMA GUMI
发明人： NISHI KUNIO , MIHARA MASAYA
IPC分类号： E02D3/08
摘要： PURPOSE:To effectively dissipate void water pressures without causing clogging apertures in crushed stones by a method in which a double structure of casing auger is penetrated into the ground, and while charging coarse crushed stones into the inner pipe and also fine crushed stones into the aperture between the inner and outer pipes, the casing auger is drawn out to form a sand pile. CONSTITUTION:A casing auger 1, consisting of an outer pipe 3, inner pipe 4, and two or three cutter pieces 2 attached to the tip of the outer pipe in an opening and closing manner, is penetrated into the ground 6, and before the auger 1 is pulled up, coarse stones 10 are charged into the inner pipe 4 and fine crushed stones 11 are charged into the aperture between the inner and outer pipes 4 and 3. In the double structure pile so formed, the clogging of apertures in coarse crushed stones by the soil of liquefied ground can be prevented, and void water pressures can be effectively dissipated.

5. 发明专利

JPS6383326A SUPPRESSING CONSTRUCTION FOR OSCILLATORY PROPAGATION ON GROUND 失效
公开(公告)号：JPS6383326A
公开(公告)日：1988-04-14
申请号：JP23093786
申请日：1986-09-29
申请人： HAZAMA GUMI
发明人： NISHI KUNIO
IPC分类号： E02D31/08
摘要： PURPOSE:To suppress the propagation of oscillation due to the operation of a construction equipment or the like, by inserting a freezing pipe into ground on the oscillatory propagation way, and by filling up the pipe with freezing liquefied nitrogen gas to form the wall of frozen earth different from oscillatory propagation characteristic impedance. CONSTITUTION:In the area of a positioning section on ground 1, a plurality of boring holes 6 are excavated and freezing pipes 7 are driven therein, and into the pipes, refrigerants are poured, and the ground 1 near the freezing pipes 7 is frozen. For the freezing pipes 7, doubled pipes with internal pipes 7a for the flowing-in passages of the refrigerants and with external pipes 7b for the return passages of the refrigerants are used, and the brine of a freezing cycle is circulated through the start and return passages, and liquid nitrogen is discharged from a cylinder into the flowing-in and return passages, and the passages are filled up with the nitrogen to freeze the ground 1 to solidify it. Then, in the ground on the oscillatory propagation way, the wall 5 of frozen earth with impedance different from oscillatory propagation characteristic impedance is formed. As a result, oscillatory propagation in a low frequency area which has an adverse influence upon structures and human bodies can be suppressed.

6. 发明专利

JPS61200216A METHOD OF COMPACTING SANDY GROUND 失效
公开(公告)号：JPS61200216A
公开(公告)日：1986-09-04
申请号：JP22015784
申请日：1984-10-19
申请人： HAZAMA GUMI
发明人： MIHARA MASAYA , NISHI KUNIO
IPC分类号： E02D3/08
摘要： PURPOSE:To effectively transfer vertical vibration energy produced during penetration, by a method wherein a drain pipe and a support pile are penetrated into an upper sandy ground, the following support pile is added to the preceding pile to penetrate only the piles, and filling with a filling material is effected as the drain pipe is pulled off. CONSTITUTION:A drain pipe 1 and a support pile 9 are simultaneously penetrated into an upper sandy ground 8 by a pile driving machine, and gap water 10 entering a cylinder body 2 is discharged to a ground surface. After they are penetrated down to a given position, the following support pile 9 is added to the preceding pile, and only the support piles 9 are penetrated by a pile driving machine. After the pile is penetrated down to a support layer 13, a filling material 15, such as sand, is charged as, with a bottom cover 3 opened, the drain pipe 1 is pulled off, and the surrounding of the support piles 9 is filled with the filling material 15. This causes a drain with a blade to be penetrated together with the support piles, and enables vertical vibration energy, produced during penetration, to be repeatedly exerted as a shearing force throughout a wide range of the upper sandy ground.

7. 发明专利

JPS6198813A Method of improving sandy ground 失效
标题翻译：改善砂土地基的方法
公开(公告)号：JPS6198813A
公开(公告)日：1986-05-17
申请号：JP22015684
申请日：1984-10-19
申请人： Hazama Gumi Ltd
发明人： MIHARA MASAYA , NISHI KUNIO
IPC分类号： E02D3/08 , E02D3/10
CPC分类号： E02D3/10
摘要： PURPOSE:To effectively compact a sandy ground through effective propagation of vertical vibration of a pipe to a sandy ground, by a method wherein, during penetration of a pipe, gap water is collected in the pipe to drain the water to a ground surface. CONSTITUTION:A casing pipe 1 is penetrated into a sandy ground 7 through application of vertical vibration, and gap water 8, entering the pipe 1 through slit formed in and a filter attached to the peripheral surface of a pipe 1, is drained through a hose 10. A given amount of a filler 12, such as sand, is charged into the pipe 1, the bottom cover 3 of the pipe 1 is opened, and the pipe is lifted to a given position. By re-driving the pipe 1, the bottom cover 3 is closed, the filler 12 is compacted, and the pipe is pressed in the sandy ground 7 therearound. This causes the gap water to be collected in the pipe 1 during penetration of the pipe 1 to drain the water to a ground surface, resulting in the possibility to effectively propagate vertical vibration of the pipe 1 to the sandy ground to effectively compact the sandy ground.
摘要翻译：目的：通过有效地将管道的垂直振动传播到沙地来有效地压实沙地，通过一种方法，其中在管道穿透期间，将间隙水收集在管道中以将水排出到地面。构成：通过施加垂直振动，套管1穿过沙地7，并且通过形成在其中的狭缝形成的狭缝8和连接到管1的外周表面的过滤器的间隙水8通过软管排出将一定量的填料12（例如砂）装入管1中，管1的底盖3打开，并将管提升到给定位置。通过重新驱动管1，底盖3关闭，填料12被压实，并且管被压在其周围的沙地7中。这导致在管道1渗透期间在管道1中收集间隙水以将水排放到地表面，导致有效地将管1的垂直振动传播到沙地以有效地压实沙地。

8. 发明专利

JPH08128054A GROUND STRUCTURE FOR COUNTERMEASURE AGAINST LIQUEFACTION AND ITS CONSTRUCTION METHOD 失效
公开(公告)号：JPH08128054A
公开(公告)日：1996-05-21
申请号：JP26536294
申请日：1994-10-28
申请人： HAZAMA GUMI
发明人： NISHI KUNIO , MIHARA MASAYA , OHASHI MIKIO
IPC分类号： E02D3/12 , E02D27/34 , E02D31/00
摘要： PURPOSE: To provide ground structure for countermeasure against liquefaction which is easy in construction even in a place where existing structure are crowded, and can reduce hours and costs for construction, and even if a supporting ground is liquefied, can sufficiently support the existing structures. CONSTITUTION: Ground structure for countermeasure against liquefaction is improved by solidifying a liquefied layer 4a just under the whole or partial members earthed by existing structures 1 to a nonliquefied layer 4b. A construction method for this ground structure is to form a plurality of holes on the bottom plate of an existing tank 1 and/or its peripheral ground in the neighborhood of a joined part between the side plate 1a and the bottom plate of the existing tank 1 and to cylindrically agitate the liquefied layer 4a through the holes. At the same time as an agitating process or after it, solidifying agent is injected into each cylindrically agitated liquefied layer 4a through the holes to form a plurality of cylindrical solidified bodies 22.

9. 发明专利

JPH0673723A VIBRATING COMPACTION METHOD 失效
公开(公告)号：JPH0673723A
公开(公告)日：1994-03-15
申请号：JP22433792
申请日：1992-08-24
申请人： HAZAMA GUMI
发明人： NISHI KUNIO , SUGIURA HITOSHI
IPC分类号： E02D3/046
摘要： PURPOSE:To make uniform compaction of ground possible by a method wherein vibration equipment carrying a duplex or more type vibrators is used, and vibration sources thereof are excited in frequencies that are different from one another. CONSTITUTION:By adjusting a hydraulic throttle valve 8, oil pressure lower than that in a hydraulic hose 6b is supplied, for instance, to a hydraulic hose 6a, and oil-hydraulic motors 2 of a vibrator 1A and a vibrator 1B are driven. As a result, each of weights 4 is rotated, and the vibrator 1A is vibrated at a frequency of 45Hz, while the vibrator 1B is vibrated at a frequency of 50Hz. Therefore, swell oscillation arising from the difference of frequencies occurs to the ground, and such swell oscillation is uniformly applied to areas around the ground on which the vibrators 1A and 1B are installed. Thereby, uniform compaction can be executed.

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