Abstract:
PURPOSE: A nail with an excellent gripping force and excellent workability and a construction method thereof is provided to improve the gripping force at an end portion due to the blowing portion of an expansion portion during nail construction. CONSTITUTION: A nail with an excellent gripping force comprises a support portion(100) and a head portion. The support portion is separated a long support portion and a front support portion and is connected with a coupler. The head portion comprises a fixed body(210), an expansion portion(230), a front case(240), and a fixture(250). The fixed body comprises an outer taper and an inner taper. The expansion portion is expanded in order to prevent the pullout of the nail by a fixed wedge inserted around. The front support portion is fixed on the fixed body and includes a stopper(241) protruded to an internal space. The fixture is fixed on one side of the support portion and includes a female screw penetrated by a bolt in order to insert a bolt.
Abstract:
PURPOSE: An anchor with a spiral unit and a method of constructing using the anchor and a vegetation mat are provided to enable easy installation of an anchor, firm installation and fixation of a vegetation mat and prevent the separation of the vegetation mat. CONSTITUTION: An anchor(10) comprises a shaft(11), and a spiral unit(12). The shaft is formed in a cylinder shape so that the central part of the shaft is hollow. A plurality of fixing holes(11b) are formed on the upper surface of the shaft. The spiral unit is protruded along the outer circumferential surface of the fixing hole in a spiral shape.
Abstract:
PURPOSE: A front expansion type rock bolt and a construction method thereof are provided to reduce the deformation caused by pressure after construction and to have large resistance, and to reduce the period and cost of construction. CONSTITUTION: A construction method of a front expansion type rock bolt comprises the steps of preparing a tension member(110) and an expansion fixture(120), assembling the expansion fixture to the front end of the tension member, installing a fastener(130) to the expansion fixture of a front expansion type rock bolt(100) and inserting to an anchor hole, releasing the inserted fastener of the front expansion type rock bolt, grouting into the anchor hole fixed with the front expansion type rock bolt, and tensing and fixing the front expansion type rock bolt fixed to the grouting.
Abstract:
PURPOSE: A ground space compression apparatus using a spring and a wedge and a construction method thereof, and a method for removing a tensile member connected to the apparatus are provided to simply and securely install earth anchors on an excavated slope or retaining wall. CONSTITUTION: A ground space compression apparatus(10) comprises a wedge part(120), a clutch part(130), and a connection part(140). The wedge part includes a clutch body(121) and a clutch bit(122) opened around a steel bar(110). The clutch part is provided on the upper side of the wedge part and slides, and includes a spring(136) interposed between a fixed support(131) and a movable taper compressor(133). The connection part is to connect a nail or wire anchor.
Abstract:
PURPOSE: A ground anchor with an expanded anchor head part and a construction method of an anchor using the same are provided to control ground displacement after the installed ground anchor is tensed. CONSTITUTION: A ground anchor with an expanded anchor head part comprises an anchor head part(200), a support part(100), a pressure plate, and a tension part. The anchor head part is composed of a head(210) and a contact part(220). The contact part is hinged on a mounting groove of the head. The support part is assembled in a fitting hole of the head. The pressure plate supports the support part when the support part is tensed. The tension part tenses the support part.