Large concrete block for crane lifting, method for manufacturing same, and method for installing same

Abstract

Disclosed herein is a large concrete block for crane lifting. The large concrete block includes a large concrete block body ( 110 ) made of concrete, and a connection-wire-rope insert tube ( 120 ) made of synthetic resin. The connection-wire-rope insert tube is embedded at a medial portion thereof in the concrete block body in such a way that opposite ends of the connection-wire-rope insert tube are disposed at an upper surface of the concrete block body and oriented upwards. The present invention having the above construction can solve problems which have been caused in the conventional technique that uses a lifting eye member.

1 . A large concrete block for crane lifting, comprising:
 a concrete block body made of concrete; and   a connection-wire-rope insert tube made of synthetic resin, the connection-wire-rope insert tube being embedded at a medial portion thereof in the concrete block body in such a way that opposite ends of the connection-wire-rope insert tube are disposed in an upper surface of the concrete block body and oriented upwards.   
     
     
         2 . The large concrete block for crane lifting of  claim 1 , wherein the medial portion of the connection-wire-rope insert tube is arranged to have an arc shape that is convex downwards along a longitudinal direction thereof. 
     
     
         3 . The large concrete block for crane lifting of  claim 1 , wherein the connection-wire-rope insert tube has a corrugated tube shape. 
     
     
         4 . The large concrete block for crane lifting of  claim 1 , wherein a tube stopper is removably coupled to each of opposite ends of the connection-wire-rope insert tube. 
     
     
         5 . The large concrete block for crane lifting of  claim 1 , further comprising
 a connection wire rope, with lifting eyes provided on respective opposite ends of the connection wire rope,   wherein the connection wire rope is disposed in the connection-wire-rope insert tube so as to be movable along the connection-wire-rope insert tube, and the lifting eyes of the connection wire rope are exposed to the outside from the connection-wire-rope insert tube.   
     
     
         6 . A method for manufacturing a large concrete block for crane lifting, comprising: disposing a connection-wire-rope insert tube made of synthetic resin in a mold for forming a concrete block body in such a way that the connection-wire-rope insert tube has a U shape; and casting concrete into the mold and forming a concrete block body in such a way that a medial portion of the connection-wire-rope insert tube is embedded in the concrete block body and opposite ends of the connection-wire-rope insert tube are disposed at an upper surface of the concrete block body and oriented upwards. 
     
     
         7 . A method for installation of a large concrete block, comprising:
 a concrete block manufacturing operation of disposing a connection-wire-rope insert tube made of synthetic resin in a mold for forming a concrete block body in such a way that the connection-wire-rope insert tube has a U shape, and casting concrete into the mold and forming a concrete block body in such a way that a medial portion of the connection-wire-rope insert tube is embedded in the concrete block body and opposite ends of the connection-wire-rope insert tube are disposed at an upper surface of the concrete block body and oriented upwards;   a connection wire rope installation operation of passing a first end of a connection wire rope through the connection-wire-rope insert tube so that the first end of the connection wire rope is exposed to the outside from a first end of the connection-wire-rope insert tube while a second end of the connection wire rope is exposed to the outside from a second end of the connection-wire-rope insert tube;   a lifting and placing operation of connecting a crane to the first and second ends of the connection wire rope, lifting the large concrete block using the crane, and placing the large concrete block at a predetermined place; and   a connection wire rope removal operation of removing the connection wire rope from the connection-wire-rope insert tube after the lifting and placing operation has been completed.   
     
     
         8 . The method for installation of a large concrete block of  claim 7 , wherein the connection wire rope comprises lifting eyes provided on respective opposite ends of the connection wire rope,
 in the lifting and placing operation, the crane uses both the lifting eyes to lift the large concrete block and place the large concrete block at a predetermined place, and   the connection wire rope removal operation comprises separating either of the lifting eyes from the crane and lifting a remaining one of the lifting eyes using the crane so that the connection wire rope is removed from the connection-wire-rope insert tube.