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    • 1. 发明专利
    • Excavation bit
    • 挖掘位
    • JP2008063941A
    • 2008-03-21
    • JP2007304176
    • 2007-11-26
    • Kajima Corp鹿島建設株式会社
    • MANABE SATOSHISASAKI YUKINOBUIGARASHI HIROMASAIMAGAWA TSUTOMUNAKADA HISAYAYAMANAKA HIROYUKI
    • E21D9/087
    • PROBLEM TO BE SOLVED: To provide excavation bits which prevent cut fibers from having lengths longer than necessary in cutting concrete or mortar reinforced with fibers, thereby preventing formation of a large mass of the concrete or the mortar having the fibers adhering thereto when the concrete or mortar is removed, to smoothly cut concrete or the like. SOLUTION: A plurality of the excavation bits (20N) are radially arranged from the center of the shield cutter (100) of a shield machine. The excavation bit is formed into a recessed shape with a region (40) having no cutting section in the radial direction, has a radially inside cutting region (30a) and a radially outside cutting region (30b) on the opposite sides of the region (40), wherein the size (L1) in the radial direction between the adjacent bits is equal to the size (L2) in the radial direction of the region (40) and the upper faces (30c) of the cutting regions (30a, 30b) are depressed at the center section in the rotating direction (T). COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:为了提供防止切割纤维在切割由纤维增强的混凝土或砂浆中所需的长度的挖掘钻头,从而防止大量的混凝土或具有附着在其上的纤维的砂浆形成, 混凝土或砂浆被去除,以平滑地切割混凝土等。 解决方案:多个挖掘钻头(20N)从屏蔽机的屏蔽切割器(100)的中心径向布置。 挖掘钻头形成为具有径向不具有切割区域的区域(40)的凹入形状,在该区域的相对侧上具有径向内部切割区域(30a)和径向外侧切割区域(30b) 40),其中相邻位之间的径向尺寸(L1)等于区域(40)的径向尺寸(L2)和切割区域(30a,30b)的上表面(30c) )在中心部分沿旋转方向(T)压下。 版权所有(C)2008,JPO&INPIT
    • 2. 发明专利
    • Excavation bit
    • 挖掘位
    • JP2004197302A
    • 2004-07-15
    • JP2002363264
    • 2002-12-16
    • Kajima Corp鹿島建設株式会社
    • MANABE SATOSHISASAKI YUKINOBUIGARASHI HIROMASAIMAGAWA TSUTOMUNAKADA HISAYAYAMANAKA HIROYUKI
    • E21D9/087E21D9/08
    • PROBLEM TO BE SOLVED: To provide excavation bits which are for use in cutting concrete or mortar reinforced with fibers, which can prevent cut fibers from having lengths longer than necessary, thereby able to prevent formation of a large mass of the concrete or mortar having the fibers adhering thereto when the concrete or mortar is removed. SOLUTION: The excavation bits (20N) are arranged on a shield cutter (100) of a shield machine. Each bit has a bit cutting section (30) located opposite to a bit mounting side (U) of the shield cutter (100), and the bit cutting section (30) has a notch region (40) formed in a surface thereof. The notch region (40) has a recessed cross section and extends along a bit rotating direction (direction indicated by an arrow T). COPYRIGHT: (C)2004,JPO&NCIPI
    • 要解决的问题:提供用于切割用纤维增强的混凝土或砂浆的挖掘钻头,其可以防止切割的纤维具有长于所需的长度,从而能够防止形成大量的混凝土或 当混凝土或砂浆被去除时,具有粘附到其上的纤维的砂浆。 解决方案:挖掘钻头(20N)布置在屏蔽机械的屏蔽切割器(100)上。 每个位具有与屏蔽切割器(100)的钻头安装侧(U)相对的位切割部(30),钻头切割部(30)在其表面上形成有切口区域(40)。 凹口区域(40)具有凹入的横截面并沿着位旋转方向(箭头T所示的方向)延伸。 版权所有(C)2004,JPO&NCIPI
    • 4. 发明专利
    • METHOD AND FACILITIES FOR STOCKING, CARRYING AND SENDING OUT SHIELD SEGMENTS IN PIT
    • JP2000282800A
    • 2000-10-10
    • JP8799999
    • 1999-03-30
    • KAJIMA CORP
    • NAKADA HISAYAKATO MAKOTO
    • E21D11/40E21F13/02
    • PROBLEM TO BE SOLVED: To provide facilities which can effectively use the interior of a pit having only a small tunnel cross section, in a shield tunnel construction, can store segments in an amount required for the construction, and can send out the same. SOLUTION: A segment S is carried into a shield pit B by suspending and lifting down the same from an entrance, and it is placed on a storage frame 1 such that a circular arc direction of the segment is orthogonal to an axial line of a tunnel. Then, the segment S is sequentially moved forward, to thereby store the segments S in the shield pit B. When the segments S are needed as the construction is carried out, one block of the segments S is mounted on a rotary truck 3 traveling on a rail 2, and the block is rotated such that the circular arc direction of the segments S corresponds to the axial direction of the tunnel, followed by moving the truck to a shipping location T. By operating a setter 6, the block of the segments S is jacked up to return the rotary truck 3 to its original location, and the rail 2A is slid toward a cutting face. Thereafter, the block of the segments S is jacked down to be mounted on the carrying truck 12, and then the truck is moved toward the cutting face.
    • 8. 发明专利
    • STABILIZER LIQUID REGENERATION DEVICE IN UNDER-GROUND CONTINUOUS WALL CONSTRUCTION METHOD
    • JPH0665918A
    • 1994-03-08
    • JP22240892
    • 1992-08-21
    • KAJIMA CORP
    • NAKADA HISAYAHISAWA YUKIHIKOHATA TERUMICHIISHIZAKA MINENAGASE SHINICHIYOKOYAMA MITSURU
    • E02D5/18
    • PURPOSE:To prevent the deterioration of a stabilizer solution by computing a required amount of CO2 based on signals transmitted from an inlet meter and an outlet meter of a circulation tank performing a flow rate control based on a large range flow meter when the computed amount exceeds a specified value and flow rate control based on a small range flow meter when the computed amount fails to exceed the specified value. CONSTITUTION:A feed forward circuit 11 computes a required amount of CO2 based on a signal transmitted from an inlet pH meter of a circulation tank 1. A first indication controller 13 outputs an output signal of pH based on a signal from an outlet pH meter H1 of a circulation tank 3. An addersubtracter element 14 determines a supply quantity of CO2 based on the difference between the output values of the pH meters H1 and H2. Furthermore, a second indication controller 15 transmits an output signal to motor-driven valves V1 to V3 in conformity with the supply quantity of CO2. A hysteresis circuit 16 closes a contact (a) of a charge-over switch W2 when the CO2 quantity exceeds 100Nm /H for example, and uses a large range flow meter FB. When it fails to exceed 70Nm /H for example, the circuit closes a contact (b) and uses a small range flow meter FS, thereby controlling the flow rate so that the pH value may become an objective value.
    • 9. 发明专利
    • DEVICE FOR CONTROLLING LEVEL OF STABILIZER LIQUID FOR EXCAVATION WALL SURFACE
    • JPH0649838A
    • 1994-02-22
    • JP20242292
    • 1992-07-29
    • KAJIMA CORP
    • NAKADA HISAYAHISAWA YUKIHIKOISHIMARU YUTAKAYOKOYAMA MITSURUMANABE SATOSHI
    • E02D5/18G05D9/00
    • PURPOSE:To aim at the stability of the wall surface by controlling the revolution of a liquid feeding pump on the basis of a difference between a level measured value and a set value during the excavation and controlling the open of a control valve on the basis of the difference during the stop of the excavation to reduce the fluctuation of level. CONSTITUTION:A flow quantity equivalent to a difference of a measured value of the stabilizing liquid surface inside of an excavation groove, which is detected by a level meter 13, and a set value, which is previously set, is obtained by a control board 15. The control board 15 judges whether or not the excavation is being performed at present, and in the case where the excavation is performed at prevent the control board 15 controls the revolution of a liquid feeding pump 1 in response to the flow quantity equivalent to the difference. In the case where the excavation is stopped, the control board 15 controls the open degree of a control valve 6 in response to the difference to reduce the level fluctuation of the stabilizer liquid inside of a groove. Level fluctuation of the stabilizer liquid is thereby reduced, and the groove wall is stabilized, and the generation of breakdown of the wall and the fall of soil is judged, and the deformation of a jacket of an artificial island is prevented.