Abstract:
기설 콘크리트 구조물의 하면에 홈부를 형성하고, 광섬유 센서를 내장하고 있는 센서 매립봉을 홈부에 위치시키고 채움재를 채워서 센서 매립봉을 매립하여 기설 콘크리트와 일체화시키되, 센서 매립봉을 홈부에서 지지함과 동시에 홈부를 폐쇄하여 채움재의 거푸집 기능을 수행하는 홀더 거푸집 부재를, 위에서 아래로 가압하는 간단한 이용하여 작업에 의해 설치하도록 함으로써, 센서 매립봉의 설치 작업을 간소화시켜서 신속하고 간편하게 이루어질 수 있게 하여 시간과 비용을 크게 절감할 수 있으며, 기설 콘크리트 구조물의 손상도 최소화시킬 수 있는 변형률 계측용 센서 매립봉의 기설 콘크리트 구조물 설치구조 및 설치방법에 관한 것이다.
Abstract:
본 발명은 사면에 이동점을 설치하고 와이어의 일단을 이동점에 연결하며 와이어의 타단에는 변위계를 설치하여, 이동점의 변위량을 실시간으로 무인 계측하여 사면의 상태를 감시하되, 전기 등과 같은 외부의 에너지 공급 없이 와이어에 지속적으로 장력을 부여함으로써 이동점이 이동하여 발생하는 변위량을 정확하게 계측할 수 있도록 하며, 변위계로서 광섬유센서를 이용한 변위계를 사용함으로써 계측의 신뢰성을 더욱 향상시킨 "무동력 장력유지 구조와 광섬유센서를 이용한 사면 감시 시스템 및 사면 감시 방법"에 관한 것이다.
Abstract:
본 발명은 선형센서가 중심에 매립되어 있는 심선을 중앙에 배치하고, 상기 심선의 주변에 복수개의 주변 강선을 배치한 후, 상기 주변 강선을 꼬아서 강연선을 제작함에 있어서, 상기 선형센서는 내구성이 우수한 섬유보강복합소재(Fiber Reinforced Plactic/"FRP")로 제작된 심선 내에 매립되어 있으며 상기 심선의 외면에는 섬유가 피복되어 있어 섬유보강복합소재의 갈라짐, 변형 및 손상을 방지할 수 있는 구조를 가지고 있고, 제작이 용이할 뿐만 아니라, 선형센서의 손상 우려가 없도록 하여 선형센서의 높은 측정 정밀도를 보장하여 우수한 품질을 발휘할 수 있도록 하는 강연선의 제작방법과, 그에 의해 제작된 강연선에 관한 것이다. 본 발명에서는 내부에 선형센서(3)가 매립되어 있도록 FRP 봉(10)을 형성하고, 상기 FRP 봉(10)의 외면을 외피섬유(20)로 피복하여 심선(1)을 제작하고; 심선(1)의 주위에 주변 강선(2)을 배치하고 주변 강선(2)을 꼬는 작업을 수행하여, 심선(1) 내부에 선형센서(3)가 매립되어 있고 심선(1) 주위에는 복수개의 주변 강선(2)이 꼬여있는 강연선을 제작하는 것을 특징으로 하는 강연선의 제작방법과, 이에 의해 제작되는 강연선이 제공된다.
Abstract:
The present invention relates to a method for manufacturing a strand and a strand manufactured by the method, which is easy to manufacture and achieves high quality by assuring high measurement precision of a linear sensor by preventing the linear sensor from being damaged, by using a core of a structure capable of preventing crack, deformation and damage of an FRP because the linear sensor is buried in the FRP with excellent durability and a steel is covered on the outer circumference of the FRP. In the present invention, a strand is manufactured by: manufacturing an FRP rod (10) in which a linear sensor (3) is buried; manufacturing a core (1) by coating the outer circumference of the FRP rod (10) with a steel sheath (20); and arranging a surrounding steel (2) around the core and then performing a work of twisting the surrounding steel (2). The linear sensor (3) is buried inside, and a plurality of surrounding steels (2) are twisted around the core (1) of the strand.
Abstract:
The present invention relates to a precast concrete module for securely integrating concrete modules by allowing loop steels protruding to the joints of the concrete modules to connect the adjacent concrete modules through connecting rods, a joint structure of the precast concrete module, and a precast concrete structure having the same. Concave parts (10) and convex parts (20) are successively formed on the joints of a bottom plate module (1) in a horizontal direction. The loop steels (2) are protruding from the convex parts (20). Through holes (21) are formed in the convex parts (20). The concave parts (10) formed in the concrete modules cross each other. The concave parts (10) formed in one concrete module face the convex parts (20) formed in the other concrete module. When the loop steels are located inside of the concave parts formed in the other concrete module, connecting rods (3) are inserted into the through holes (21) formed in the convex parts (20) of each concrete module (1), and the connecting rods (3) are arranged to be located on the inner side of the loops of the loop steels (2). Filler (4) is filled in the concave parts (10) and is hardened. The precast concrete structure has a structure for integrating the concrete modules to transfer force from one concrete module to the other concrete module through the loop steels and the connecting rods.
Abstract:
PURPOSE: A large concrete girder for using a UHPC(Ultrahigh Performance Concrete) member and a manufacturing method thereof are provided to reduce time and costs and to simplify the manufacturing process of a form without using a separate form member for forming the lateral side of the concrete girder. CONSTITUTION: A UHPC member(1) comprises a lower flange(10) and a vertical web(20) and is made of precast UHPC. The lateral sides of the lower flanges are continuously arranged by aligning the UHPC members. The UHPC members are integrated by pouring concrete between a pair of UHPC members for a side form. The inner flange(12) of the UHPC member is formed with a concave part(15) which comprises a laterally protruded reinforcing bar. A convex part is formed between the concave parts by protruding a loop-shaped reinforcing bar(16).
Abstract:
PURPOSE: A biaxial mixer for mixing concrete equipped with a washing water discharge apparatus is provided to discharge a large amount of washing water by opening a bottom discharge door and discharge washing water remaining in a mixing space rapidly through a end part discharge hole by opening a end part discharge door equipped with the second end part of a biaxial mixer at the same time. CONSTITUTION: A biaxial mixer for mixing concrete equipped with a washing water discharge apparatus includes a mixing tub having two cylindrical shapes. The mixing tub is horizontally arranged in a shape forming one mixing space in a line and arranges a mixer axis(20) equipped with multiple mixer tips(21) in each mixing tub. A bottom central part is equipped with a bottom discharge door which opens and closes. One end part of a length direction equips with a first flexible ascending/descending part(30) ascending and descending a biaxial mixer(1). The second end part of a length direction equips with an end part discharge door(15) opening and closing in the mixing tub. Washing water which washes the inside of a mixing space after the completion of mixing and discharges through a bottom discharge hole formed by opening a bottom discharge door. Residual washing water remaining in the bottom of a mixing tub is discharged by inclining a biaxial mixer downward in a direction of a second end part by extending of a first flexible ascending/descending part and opening the end part discharge door. Washing water is discharged through an end part discharge hole by flowing to the end part discharge hole formed by opening the end part discharge door.