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21. 发明专利

JP2004116035A Tunnel and construction method therefor 有权
公开(公告)号：JP2004116035A
公开(公告)日：2004-04-15
申请号：JP2002277477
申请日：2002-09-24
申请人： Kajima Corp , 鹿島建設株式会社
发明人： SAKATA NOBORU , KITAMOTO YUKIYOSHI , AOYANAGI TAKAHIRO , MATSUBARA KOMEI
IPC分类号： E21D11/10
摘要： PROBLEM TO BE SOLVED: To provide a construction method for a tunnel capable of controlling cracks of the secondary lining concrete without constraining the secondary lining concrete to invert concrete.
SOLUTION: A natural ground 3 is excavated and concrete is sprayed on the arch 17 and side portions 19 of a mining gallery wall 15 to install a primary lining concrete 7 and an invert concrete 9 is formed in the lower part 21. A sheet 11 is attached along the inner peripheral face 23 of the primary lining concrete 7. The end 27 of the sheet 11 is put on both ends of the inner peripheral face 29 of the invert concrete 9. And further, the secondary lining concrete 13 is placed to the inner peripheral face 25 side of the sheet 11.
COPYRIGHT: (C)2004,JPO

22. 发明专利

JP2003192421A STAIN HARDENING TYPE CEMENT BASED COMPOSITE MATERIAL HAVING SELF-COMPACTING PROPERTY AND LOW SHRINKABILITY 审中-公开
公开(公告)号：JP2003192421A
公开(公告)日：2003-07-09
申请号：JP2001389498
申请日：2001-12-21
申请人： KAJIMA CORP
发明人： KANDA TETSUSHI , SAKATA NOBORU , SUDA KUMIKO , KANEUJI MAKOTO
IPC分类号： E04G9/00 , C04B28/04 , C04B111/34
摘要： PROBLEM TO BE SOLVED: To improve the compacting properties and low shrinkability of a strain hardening type cement based composite material. SOLUTION: The strain hardening type cement based composite material having self-compacting properties and low shrinkability is the crack dispersion type fiber reinforced one exhibiting a tensile strain of ≥1% in a tensile test of a hardened body in an age of 28 days, and is obtained by blending a prepared matrix in the following [M1] with PVA (polyvinyl alcohol) short fiber in the following [F1] by an amount of >1 to 3 vol.%: [M1] where, in the use of normal portland cement or low heat portland cement, the weight ratio between water and a binder is ≥25%, a unit water content is 250 to 400 kg/m 3 , the weight ratio between a fine aggregate and the binder (S/C) is ≤1.5 (inclusive of zero), the maximum particle diameter of the fine aggregate is ≤0.8 mm, the mean particle diameter of the fine aggregate is ≤0.4 mm, the content of an expanding admixture is 3 , and the content of welan gum is 0.05 to 1.0 kg/m 3 ; and [F1] where the diameter of the fiber is ≤50 μm, the length of the fiber is 5 to 25 mm, and the tensile strength of the fiber is 1,500 to 2,400 MPa. COPYRIGHT: (C)2003,JPO

23. 发明专利

JP2003184034A METHOD FOR SUPPRESSING THERMAL CRACKING OF CONCRETE STRUCTURE 审中-公开
公开(公告)号：JP2003184034A
公开(公告)日：2003-07-03
申请号：JP2001391843
申请日：2001-12-25
申请人： KAJIMA CORP , DENKI KAGAKU KOGYO KK
发明人： SAKATA NOBORU , HIRAISHI YOSHIKI , KANEUJI MAKOTO , ANDO TOSHIHIRO , ITO SHUNJI
IPC分类号： E02B7/00 , E01D19/02 , E01D22/00 , E01D101/40 , E04G23/02
摘要： PROBLEM TO BE SOLVED: To provide a method for suppressing cracking of a concrete structure caused by change in ambient temperature, the concrete structure being susceptible to cracking, and to provide a method for particularly preventing cracking of the concrete structure caused by change in the ambient temperature after injection of a filler, by using the characteristics of the filler once injected into a gap in the concrete structure. SOLUTION: There is provided a method for suppressing cracking of the concrete structure, according to which the filler formed of a room temperature curing resin composite is injected into the gap in the concrete structure. Herein, the employed room temperature curing resin composite should have an elongation percentage of 200% or more when cured, and adhesive strength to a dry mortar cured body of 5 N/mm 2 or less. Thus, the resin composite injected into a hardened layer of the stratum functions to release thermal cracking stress generated at the gap or in the vicinity of the gap. COPYRIGHT: (C)2003,JPO

24. 发明专利

JP2002029816A CONCRETE FOR SUPERSTRUCTURE WORK OF BRIDGE AND CONCRETE STRUCTURE 失效
公开(公告)号：JP2002029816A
公开(公告)日：2002-01-29
申请号：JP2000221453
申请日：2000-07-21
申请人： KAJIMA CORP
发明人： SAKATA NOBORU , HIRAISHI YOSHIKI
IPC分类号： E01D19/12 , C04B16/06 , C04B24/26 , C04B28/02 , C04B103/32 , E01D101/00
摘要： PROBLEM TO BE SOLVED: To prevent the falling of concrete blocks which becomes a problem on a concrete bridge. SOLUTION: Unset concrete obtained by kneading >=350 kg/m3 cement, water in a water to cement (W/C) ratio of =(the amount of cement)×0.3% together with coarse aggregate and fine aggregate in such a way as to ensure >=8 cm slump immediately after kneading, >=3.0% air content immediately after kneading and >=35 N/mm2 strength for proportioning is used for the superstructure work of a bridge.

25. 发明专利

JP2001019518A ADMIXTURE FOR CONCRETE HAVING HIGH FLUIDITY 失效
公开(公告)号：JP2001019518A
公开(公告)日：2001-01-23
申请号：JP18855099
申请日：1999-07-02
申请人： KAJIMA CORP
发明人： SAKATA NOBORU , SHINODA YOSHINOBU
IPC分类号： C04B24/38 , C04B24/22 , C04B24/26 , C04B24/30 , C04B28/02 , C04B103/32
摘要： PROBLEM TO BE SOLVED: To obtain the subject admixture capable of solving troublesome of addition operation while using a general-purpose high-performance (AE) water reducer and imparting stable fluidity-keeping action by adding wellan gum to a high-performance (AE) water reducer diluted to a specific concentration. SOLUTION: This admixture for concrete having high fluidity is obtained by adding 0.1-1 wt.% wellan gum to a high-performance AE water reducer or high-performance water reducer diluted so that solid content concentration becomes 10-40%. The admixture containing the wellan gum is preferably 100-200 centipoise viscosity and exhibits good fluidity and hardly causes precipitation even when left to stand. Therefore, the admixture is suitable for automatic measurement or automatic addition system in ready-mixed concrete plant. The dilution degree of the high-performance (AE) water reducer used for the admixture has an adequate range according to the kinds. In the case of carboxylic acid-based high performance (AE) water reducer, it is preferable to dilute the reducer so that the solid content concentration becomes 10-40%.

26. 发明专利

JP2001002459A PRODUCTION OF CONCRETE USING UNWASHED SAND GRAVEL 失效
公开(公告)号：JP2001002459A
公开(公告)日：2001-01-09
申请号：JP16914899
申请日：1999-06-16
申请人： KAJIMA CORP
发明人： SAKATA NOBORU , WATANABE KENZO , SHINODA YOSHINOBU
IPC分类号： B28C7/04 , C04B14/04 , C04B14/06 , C04B18/08 , C04B28/02 , C04B111/00
摘要： PROBLEM TO BE SOLVED: To stably produce concrete having a proper slump value even if sand gravel collected from river-bed is used as it is unwashed as concrete aggregate. SOLUTION: The concrete using the unwashed sand gravel is produced by kneading the unwashed sand gravel with water and cement and adding water and flyash into the kneaded material by adjusting their ratio. For example, the unwashed sand gravel, water and cement are charged into a drum of an agitator car and kneaded, and when the rotation load of the drum is out of a fixed value, kneaded with the addition of flyash slurry adjusted in water/ powder ratio.

27. 发明专利

JP2000158435A QUALITY CONTROL METHOD FOR CONCRETE USING UNWASHED RIVERBED PEBBLES AS AGGREGATE 失效
公开(公告)号：JP2000158435A
公开(公告)日：2000-06-13
申请号：JP33990098
申请日：1998-11-30
申请人： KAJIMA CORP
发明人： SAKATA NOBORU , WATANABE KENZO , SHINODA YOSHINOBU , KOSHIZAWA SATORU , SHIMODERA SHINICHI , MUTAGUCHI SHIGERU , EZAKI SHINYA
IPC分类号： E02B7/00 , B28C5/42 , B28C7/12
摘要： PROBLEM TO BE SOLVED: To perform an appropriate concrete quality control by setting a slump as specified when unwashed riverbed pebbles are used as aggregates. SOLUTION: When a solid content obtained by dry-blending unwashed riverbed pebbles measuring 80 mm or less as aggregates with a specified amount of cement is to be charged into a stirring container aboard an agitator truck together with water and an intimate mixing agent and the mixture is to be kneaded into a concrete, an initial charge of water is set to be less than originally estimated quantity and then the amount of water corresponding to the slump, of the concrete contained in the stirring container, which is estimated based on the hydraulic pressure of a hydraulic motor for rotating the stirring container of the agitator truck or water and the intimate mixing agent are additionally charged. In this way, the slump of the concrete contained in the stirring container is slightly increased to obtain a specified slump.

28. 发明专利

JP2000144691A PREPARING METHOD FOR DAM CONCRETE 失效
公开(公告)号：JP2000144691A
公开(公告)日：2000-05-26
申请号：JP31297898
申请日：1998-11-04
申请人： KAJIMA CORP
发明人： SAKATA NOBORU , KOSHIZAWA SATORU , SHIMODERA SHINICHI , TAKAYASU EIZO , WATANABE KENZO , YOSHIDA KYOJI , NAKAMURA MASASHI
IPC分类号： E02B3/00 , E02B7/00
摘要： PROBLEM TO BE SOLVED: To provide a preparing method for dam concrete when unwashed riverbed sand and gravel is used as the aggregate of the dam concrete. SOLUTION: The collected and unwashed riverbed sand and gravel is sieved by an 8 mm-sieve and a 5 mm-sieve or a 10 mm-sieve to cut out the grain size above 80 mm, and it is classified into the fine aggregate with the grain size of 5 or 10 mm or below and the coarse aggregate with the grain size of 5 or 10-80 mm. Prescribed quantities of cement, fine aggregate and coarse aggregate are drive-blended, and the drive-blended solid is put into the stirring container of an agitator truck together with water and an admixture and kneaded.

29. 发明专利

JP2000109350A PREPARATION OF AGGREGATE FOR DAM CONCRETE 失效
公开(公告)号：JP2000109350A
公开(公告)日：2000-04-18
申请号：JP28100998
申请日：1998-10-02
申请人： KAJIMA CORP
发明人： SAKATA NOBORU , KOSHIZAWA SATORU , SHIMODERA SHINICHI , TAKAYASU EIZO , WATANABE KENZO , NAKAYA YOSHIAKI , SHINODA YOSHINOBU
IPC分类号： C04B14/02 , C04B14/04 , C04B20/00
摘要： PROBLEM TO BE SOLVED: To facilitate the sieving of fine aggregate and coarse aggregate by classifying riverbed gravel in an unwashed state to the gravel of specific grain sizes, passing the gravel through the inside of a water tank to sufficiently wet the surfaces with water and to allow the mud components sticking to the surfaces to settle on the water bottom to separate the mud components, thereby managing the surface water rate of the riverbed gravel to a stable value. SOLUTION: Riverbed gravels are classified by a 80-mm sieve and a 10-mm sieve to two; a grain size

30. 发明专利

JPH07316554A STABILIZING LIQUID IN DIGGING PROCESS AND REGENERATION OF STABILIZING LIQUID 失效
公开(公告)号：JPH07316554A
公开(公告)日：1995-12-05
申请号：JP13380394
申请日：1994-05-24
申请人： KAJIMA CORP , SANSHO CO
发明人： FURUSAWA YASUHIKO , YAMAMOTO HIROYUKI , SAKATA NOBORU , MINAMI MASAYOSHI , YOSHIZAKI MASATO
IPC分类号： E21D9/13 , C04B40/00 , C09K17/42 , C09K17/50 , E21D9/06
摘要： PURPOSE:To obtain a stabilizing liquid excellent in resistance to various kinds of ions or cement components and useful in a digging process, e.g. the shield tunneling method or the pile work process by mixing a specified amount of bentonite and a specified amount of welan gum in water. CONSTITUTION:With unit amount of water, 1 to 10wt.% bentonite and 0.01 to 1.0wt.% welan gum are admixed. Welan gum is a kind of biopolymer produced by a microorganism of strain no. Alcaligenes-ATCC 31555 and has a chemical structure of the formula. If welan gum is added to a deteriorated stabilizing liquid for a bentonite system in an amount of 0.01 to 1.0wt.% based on unit amount of water, the stabilizing liquid can be satisfactorily regenerated.

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