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11. 发明专利

JPH0533328A METHOD AND DEVICE FOR PREVENTING LIQUEFACTION FROM OCCURRING TO SANDY GROUND IN EARTHQUAKE 失效
公开(公告)号：JPH0533328A
公开(公告)日：1993-02-09
申请号：JP18751791
申请日：1991-07-26
申请人： FUJITA CORP
发明人： YAMAMOTO ITSUO , HAMAZUKA SEIJI , KOBAYASHI KATSUMI
IPC分类号： E02D3/02 , E04H9/02 , F16F15/02
摘要： PURPOSE:To efficiently prevent liquefaction of sandy ground without producing pollution. CONSTITUTION:Bag-like mats 5 are laid under the foundation of a structure 1 built on a loose sand layer 2. The mats 5 are connected with a piping 7 to a water tank 6 installed on the upper part of the structure 1. The mats 5 are filled with water under pressure and are made to apply pressure onto the sand layer 2, utilizing the weight of the structure 1 as a reaction force.

12. 发明专利

JPH04106227A AUTOMATIC EXCAVATOR FOR UNDERGROUND CONTINUOUS WALL 失效
公开(公告)号：JPH04106227A
公开(公告)日：1992-04-08
申请号：JP22369890
申请日：1990-08-24
申请人： FUJITA CORP
发明人： YAMAMOTO ITSUO , HAMAZUKA SEIJI , KOBAYASHI KATSUMI , MARU TAKAHIRO , SHIYA SENKEN
IPC分类号： E02F3/30 , E02D17/13 , E02F3/20 , E02F3/413 , E02F3/47 , E02F5/02
摘要： PURPOSE:To prevent a wire from excessively loosening, by equipping detectors for loads and lifted level on an excavator for chopping works and by automatically actuating the brake of a winch when the bucket reaches a specified position. CONSTITUTION:A load detector 30, an inclination detector 31, a level detector 32, etc., are equipped in an underground excavator carrying out a chopping work by dropping a hydraulic clamshell bucket 235 by its own weight. And an arithmetic processing unit is equipped to wind up and off the winch in accordance with these detected data. And when the clamshell bucket 235 is forced to sink into the excavated ground, the falling time is measured by a timer and when it reaches a preset time, the brake is actuated to stop winding off of the winch. In this way, excessive loosening and disordered winding can be previously prevented.

13. 发明专利

JPH0230806A LIQUEFACTION PREVENTIVE CONSTRUCTION FOR SANDY GROUND AT TIME OF EARTHQUAKE 失效
公开(公告)号：JPH0230806A
公开(公告)日：1990-02-01
申请号：JP18037088
申请日：1988-07-21
申请人： FUJITA CORP
发明人： YAMAMOTO ITSUO , HAMAZUKA SEIJI
IPC分类号： E02D5/80 , E02D3/00 , E02D27/34
摘要： PURPOSE:To effectively prevent sandy ground from being liquefied, without pollution by arranging earth anchors between a pressure-resisting board set under the foundation of a structure and strong ground under the sandy ground, and by introducing prestress. CONSTITUTION:At the lower section and on the periphery of a structure 2 constructed on relaxed sandy ground forecast to be liquefied at the time of earthquake, a pressure-resisting board 3 made of reinforced concrete is set. Then, earth anchors 4 are driven into the pressure-resisting board 3, and the lower ends of the anchors 4 are set on the strong ground 5 of generating no liquefaction, and the earth anchors 4 are stretched and are set on the pressure- resisting board 3, and into the sandy ground 1, prestress is introduced.

14. 发明专利

JPH08277532A STRUCTURE OF FOUNDATION 失效
公开(公告)号：JPH08277532A
公开(公告)日：1996-10-22
申请号：JP8415095
申请日：1995-04-10
申请人： FUJITA CORP
发明人： MARU TAKAHIRO , HAMAZUKA SEIJI , KOBAYASHI KATSUMI , SUZUKI TAKAAKI
IPC分类号： E02D27/34
摘要： PURPOSE: To prevent a ground surface layer part from being deformed, and to improve a property of foundation resisting horizontal force, by placing a concrete layer, of which the side parts are brought into contact with the inner surface of the top part of a deep mixing improvement body, on the ground dug deeper than the level of the top end of the body. CONSTITUTION: A deep mixing improvement body 3 surrounding a foundation pile 2 driven in soil 1 in lattice shape is deeply made in the earth, and a slab- like concrete layer 4 having a specified strength is placed on the soil 1 exposed. Protrusions 9 protruding in the soil 1 are integrally provided at the lower part of the concrete layer 4.

15. 发明专利

JPH05311880A 失效
公开(公告)号：JPH05311880A
公开(公告)日：1993-11-22
申请号：JP21288091
申请日：1991-07-29
申请人： FUJITA CORP
发明人： MUNEMURA YOSHISADA , NAGAI OSAMU , HAMAZUKA SEIJI
IPC分类号： E04B1/35 , E04G21/14
摘要： PURPOSE:To reduce the working cost, to eliminate after works after a building frame is constructed, and to perform a work regardless of weather. CONSTITUTION:According to a building frame construction method for a structure having plural spans in the direction of an arrow X and in the direction intersecting the X direction, a building frame (prepared building frame) 10 for one span in the direction of the arrow X and all spans in the other direction is previously constructed. A table receiving frame 20 which has a designated length in the direction of X and in the direction intersecting the X direction and is capable of moving in the respective directions is extended between the top of the prepared building frame 10 and the ground T of a site where a structure is constructed. A crane 40 capable of moving in the respective directions is disposed in the table receiving frame 20, and the table receiving frame 20 and the crane 40 are moved in the respective directions to transport a building frame member 50 by the crane 40. The remaining building frame (new building frame) 60 adjacent to the existing building frame 10 is constructed.

16. 发明专利

JPH03244713A DIGGING BUCKET FOR UNDERGROUND CONTINUOUS WALL 失效
公开(公告)号：JPH03244713A
公开(公告)日：1991-10-31
申请号：JP4210390
申请日：1990-02-21
申请人： FUJITA CORP
发明人： YAMAMOTO ITSUO , HAMAZUKA SEIJI , KOBAYASHI KATSUMI , MARU TAKAHIRO
IPC分类号： E02D17/13 , B66C1/62 , B66C3/02 , E02F3/20 , E02F3/47 , E02F5/02
摘要： PURPOSE:To automate digging including chopping and improve the efficiency thereof by supplying working oil to a hydraulic cylinder for chopping of an underground continuous wall digging bucket to raise a bucket support body, and rapidly dropping the bucket support body by instantly discharging the working oil. CONSTITUTION:Working oil is supplied from a hydraulic control device 23 to hydraulic cylinders 21, 22 connecting a bucket supporting body 11 to a member 17 for supporting a sheave 18 around which is wound a suspension wire 19. As a result, the bucket support body 11 including a cram shell 14 rises by a specified amount and the working oil in the hydraulic cylinders 21, 22 under that condition is instantly discharged by the hydraulic control device 23. As a result of this discharge, the bucket support body 11 including a cram shell 14 drops rapidly and the cram shell 14 with its cutting edge is made by a hydraulic jack 15 for opening and closing the cram shell 14 to bite into a hard ground. This automatic chopping action is repeated thereafter.

17. 发明专利

JPH03212510A PILE WITH SPRING 失效
公开(公告)号：JPH03212510A
公开(公告)日：1991-09-18
申请号：JP633490
申请日：1990-01-17
申请人： FUJITA CORP
发明人： YAMAMOTO ITSUO , HAMAZUKA SEIJI , KOBAYASHI KATSUMI , MARU TAKAHIRO
IPC分类号： E02D5/22 , E02D5/60 , E02D27/34 , E02D31/00 , E02D31/08
摘要： PURPOSE:To absorb vibration and impact force applied to a construction by interposing a spring between a case for covering a pile head portion slidably and the upper end surface of the pile, and loading a rust preventing material. CONSTITUTION:A case 2 made of a sheet steel is put on the pile head portion of a high strength concrete pile body 1 in such a manner as to freely slide up and down. A steel spring 4 is interposed between the case 2 and a top cover piece 3a of a pile head reinforcing crown body 3 made by a sheet steel. An oil filler hole 5 is provided in the case 2, and an oil outflow mechanism 6 is disposed on the cover piece 3a. By this arrangement, the spring 4 is expanded and contracted in relation to the load applied to the pile head portion 1, and the case 2 is slid along the pile body 1 to absorb the impact force and vibration applied to a construction.

18. 发明专利

JPH03176509A LOAD TESTING METHOD OF CAST-IN-PLACE PILE AND DEVICE THEREOF 失效
公开(公告)号：JPH03176509A
公开(公告)日：1991-07-31
申请号：JP31427889
申请日：1989-12-05
申请人： FUJITA CORP
发明人： YAMAMOTO ITSUO , HAMAZUKA SEIJI , KOBAYASHI KATSUMI , MARU TAKAHIRO
IPC分类号： E02D5/36 , E02D13/06 , G01L5/00
摘要： PURPOSE:To measure easily and economically by applying water pressure to an elastic pressure bag to load a bottom protective case to the ground, and measuring a quantity of settlement of the bottom protective case, water pressure and each life-free quantity of a top protective case and a pile head section. CONSTITUTION:An elastic pressure bag 4 covered with a top protective case 2 and bottom protective case 3 is loaded to the end of a case-in-place pile 1. Displacement wires 5 and 6 are respectively connected to the cases 2 and 3 to connect to displacement meters 7 and, at the same time, displacement meters 8 provided with pile head displacement measuring bars are loaded to a pile head section. After that, pressure water is poured into the bag 4 by a pressure pump 9 through an injection pipe 10, and the case 3 is pressed and loaded to the ground. A quantity of settlement of the case 3, water pressure and each lift-free quantity of the case 2 and pile head section are measured, and the relation between load of the pile end and settlement and the relation between frictional force of the circumferential surface of the pile and displacement are clearly separated from each other to measure. Accordingly, a load testing method can be easily and economically implemented.

19. 发明专利

JPH038924A PRELOADING BAG BODY DEVICE OF PILE POINT GROUND 失效
公开(公告)号：JPH038924A
公开(公告)日：1991-01-16
申请号：JP14306389
申请日：1989-06-07
申请人： FUJITA CORP , BRIDGESTONE CORP
发明人： YAMAMOTO ITSUO , HAMAZUKA SEIJI , MARU TAKAHIRO , UEDA SHIGEO
IPC分类号： E02D5/62 , E02D5/34
摘要： PURPOSE:To facilitate the insertion of a reinforcement cage or an existing pile to the ground by forming a bag body and a protective case housing the bag body into a circular body provided with a through-hole in the central part thereof and, at the same time, making it possible to expand along the circular body. CONSTITUTION:A pressure rubber closed bag body 2 is fitted to a steel protective case 9 to make a bag body device 1. The bag body 2 is formed into a circular body having a center through-hole passing through from top to bottom, the sides thereof are capable of expanding in the vertical direction with bellows, and coupling pipes 4 and 5 are buried into the upper surface thereof together as a unit. The protective case 9 is so constituted that a lower case 17 is loosely fitted to the periphery of an upper case 10, the bag body 2 is placed upward of the upper case 10, and when the lower case 17 is fitted to the bag body from the bottom, the center through-holes of the circular bodies are overlapped to form a center through-hole 22.

20. 发明专利

JPH01315524A WALING STRUCTURE 失效
公开(公告)号：JPH01315524A
公开(公告)日：1989-12-20
申请号：JP14578288
申请日：1988-06-15
申请人： FUJITA CORP
发明人： HAMAZUKA SEIJI , YAMAO SHINICHI
IPC分类号： E02D17/04
摘要： PURPOSE:To make improvements in working property by joining adjacent wales together with a high-tension bolt at a waling joint, and joining a strut end to each H section piece joined astride each inner side of both these wales as holding the joint in between. CONSTITUTION:A joint of each wale 1 is installed in each setup position of struts 2, and end plates 3 themselves of adjacent wales 1 are clamped by a high-tension bolt at this joint. In addition, each outer flange of short H section pieces 5 are joined together astride each inner side of these adjacent wales 1 as holding the joint in between and jointed with a bolt 6, while the struts 2 is joined to each inner flange with bolts 7.

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