Abstract:
PURPOSE: A pressure release duct tunnel system of a 0.25-kilometer twin bore tunnel is provided to ease passengers by reducing ear noises, to economize in construction expenses by reducing the cross sectional area of a tunnel and to improve the speed of a train. CONSTITUTION: The pressure release duct tunnel system of a 0.25-kilometer twin bore tunnel contains 6 pressure release ducts installed on side walls of the twin bore tunnel where a single tunnel is installed adjacently. And the pressure release ducts, which are 2.25 meters in diameter, are installed at 40.87-meter intervals.
Abstract:
PURPOSE: An anchor for a sensor for measuring ground vibration is provided to increase accuracy and reliability in measuring ground vibration by increasing a contact area of the anchor with the ground and integrating the sensor and the ground. CONSTITUTION: An anchor for a sensor for measuring ground vibration includes an anchor body(10), a strike cap(20) and a fixed plate. The anchor body is gradually narrowed toward a lower part and has a plurality of projections(11) formed on an external diameter in a longitudinal direction and a connection projection(12) formed on an upper surface. The strike cap receives the connection projection for striking an upper end of the anchor body and has a receiving hole(21) formed in a lower portion having a stepped inner diameter. The fixed plate has a connection hole formed at the center for connecting with the connection projection and a plurality of sensor connecting holes formed around the connection hole in various sizes.
Abstract:
본 발명은 지반의 다짐품질 시험 등을 위한 평판재하시험을 수행함에 있어서, 지반에 하중을 가하게 되는 하중재하위치와 변위측정위치가 일치되도록 하는 구조를 가지고 있어, 하중재하시험에서 측정되는 지반의 변위 측정결과의 신뢰성을 더욱 향상시킬 수 있는 평판재하시험용 하중 재하판 및 이를 구비한 평판재하시험기에 관한 것이다. 본 발명에서는 평판재하시험에서 지면 위에 놓여 상부로부터 가해지는 하중을 직접 지반에 가하게 되는 평판재하시험용 재하판(10)으로서, 지면에 접촉하도록 배치되어 상재하중은 지반에 직접적으로 가하는 지압판(11)과; 상기 지압판(11)의 중심에 위치하며 상부에 놓이게 될 잭장치(20)에 의하여 가해지는 가압력을 상기 지압판(11)에 전달하고, 변위계(30)가 외부를 통하여 진입하여 지압판(11)의 중심점에 수직한 위치에 배치될 수 있는 내부공간(120)이 형성되어 있는 하중전달부재(12)를 포함하여 구성되는 것을 특징으로 하는 평판재하시험용 재하판이 제공되며, 추가적으로 이러한 재하판을 구비한 평판재하시험기가 제공된다.
Abstract:
PURPOSE: A loading plate for a plate loading test for matching a loading position and a displacement measuring position and a plate loading tester therewith are provided to accurately measure ground displacement by locating a displacement meter at the center of the loading plate. CONSTITUTION: A loading plate for a plate loading test for matching a loading position and a displacement measuring position comprises a pressure plate(11) and a load transfer member(12). The pressure plate is arranged to touch the ground. The load transfer member is located at the center of the pressure plate and transfers pressing force applied from a jack device(20) to the pressure plate. The load transfer member has an inner space where a displacement meter(30) is located.
Abstract:
PURPOSE: A rail flooding observation system, and a rail flooding observation method are provided to recognize whether a rail is flooded or not according to the size of the rainfall, thereby allowing the rapid management to be performed in case of the flooding of a rail. CONSTITUTION: A rail flooding observation system comprises a rainfall measuring device which is installed on a rail at a constant interval, measures the rainfall at the installed location to generate the rainfall data, and transmits the generated rainfall data; and a control server which receives the rainfall data from the rainfall measuring device, calculates the received rainfall data accumulatively according to time so as to calculate the accumulated rainfall or the rainfall per an hour, checks whether the accumulated rainfall or the rainfall per an hour exceeds the flooding critical amount or not, and determines whether the rail flooding situation at the location in which the rainfall measuring device is installed occurs or not according to the result. The system has a casing(10), a protective cover(15), adn a water collecting container(20).
Abstract:
PURPOSE: A system and a method for automatically measuring deformation of a tunnel are provided to economically and easily perform maintenance by applying a low cost sensor, which is operated with a simple principle. CONSTITUTION: A linear detection sensor(100) is installed in the surface of tunnel lining. The linear detection sensor includes a lattice network power line(120) in which current flows. The linear detection sensor detects cutoff of the current by disconnection of a wire. A deformation recognition apparatus(200) recognizes deformation generation of the linear detection sensor. The deformation recognition apparatus transmits recognition result data with a remote site.