Abstract:
The present invention relates to a blasting method using a control device for inducing a blast pressure, and a control device for inducing the blast pressure to apply the method. According to the blasting method using the control device for inducing the blast pressure, when a blasting operation is performed at the outermost hole of a tunnel or a wayside or wall surface of a structure constructed at a location in which an adjacent structure of a downtown area is located, a transfer path of the blast pressure is controlled using the control device for inducing the blast pressure so that the blast pressure does not exceed a proposed blast line, but is limitedly transferred into only a blasting area. Thus, a smooth and elegant blasted surface may be secured, and simultaneously, an over-break may be prevented and vibration and noises may be minimized. According to the present invention, since a general inexpensive explosive is loaded into a blasting prevention cover and easily utilized, the general inexpensive explosive may be replaced with an existing expensive precision explosive to significantly reduce blasting costs and improve blasting efficiency, thereby having a large economic impact and useful effects.
Abstract:
The present invention relates to a method for manufacturing recycled aggregates, wherein said recycled aggregates are manufactured using a reaction of rapid carbonation to achieve significantly reduced absorption and increased density, which satisfy the quality standards of recycled aggregates. As opposed to conventional strong alkaline recycled aggregates, the recycled aggregates of the present invention have a low pH level, and thus minimize alkali-aggregate reactions and drying shrinkage when used in concrete, and minimize the influences on soil, on a marine environment, and on an ecosystem.
Abstract:
The present invention enables each segment, in which two center through-paths and two end through-paths are formed, to be sequentially and adjacently arranged at each column in a vertical direction, wherein: horizontal segments at four columns are set as one unit such that strands are inserted, strained, and settled therein; only one strand is settled in each segment such that only the corresponding segment is settled and fixed; the segments, by the remaining three strands, located at the other columns are sequentially settled and fixed in the same manner as above via through-paths, thereby forming a foundation reaction wall through which all the four strands pass, and at the same time, segments at the other columns are also sequentially and easily settled and fixed by the remaining three strands with respect to structurally-stabilized foundation reaction wall; and the foundation reaction wall of the segments is formed and the other columns in accordance with the foundation reaction wall are sequentially settled and fixed together with a drilling operation by repeating the above steps. Thus, through said features, the invention allows the segments to be assembled in an efficient and economical manner.
Abstract:
Disclosed is a vehicle HUD device using multiple lenses, in which optical properties of lenses and the arrangement of reflectors are enhanced to achieve improved sharpness and visibility of travel information images projected on a windshield of a vehicle. The vehicle HUD device using multiple lenses comprises: a liquid crystal panel for displaying travel information; a backlight unit arranged behind the liquid crystal panel to provide light; a plurality of reflectors for reflecting, sequentially along a specific path, travel information images displayed on the liquid crystal panel; and lenses for enlarging or contracting the travel information images reflected by the reflectors, focusing the images, and reflecting the images onto the windshield, wherein the lenses are one or more meniscus lenses which are sequentially arranged along the optical axis that is the same as the optical axis of the reflector arranged below the lenses, and which convexly protrude in the direction in which the travel information images are applied.
Abstract:
The present invention relates to a method for sorting combustible waste from construction waste, comprising: a large combustible removing step (100) of removing large combustibles from construction waste after sorting recycled aggregates; a combustible sorting step (300) of removing nonflammables from construction waste and sorting combustibles after removing large combustibles; and a wood sorting step (400) of sorting wood from the combustibles; whereby efficiently sorting combustibles such as wood and the like from construction waste, solving problems of shortage of landfill, and enabling the sorted combustibles to be re-used as fuel.
Abstract:
The present invention relates to hydraulic engineering, and particularly, to an apparatus for measuring the fluid velocity and flow rate of running water in a river, lake, sea, and the like. Particularly, the present invention relates to a system for measuring fluid velocity and flow rate and to a method for measuring same, wherein the system comprises: a plurality of floats (100) simultaneously dropped into running water to transmit GPS position information signals on a real-time basis; and a receiving station (200) which receives, on a real-time basis, the GPS position information signals transmitted from the plurality of floats (100). The plurality of floats (100) are divided into two or more sets (100a, 100b, 100c) in accordance with communication frequency bands (F1, F2, F3), and at least one of the sets (100a, 100b, 100c) consists of two or more floats (100) which use the same communication frequency band (F1, F2, F3) and which in turn transmit GPS position information signals.
Abstract:
The present invention includes: plural common terminals; plural water level measurement terminals that are arranged at a certain interval along a longitudinal direction; a water level measurement control unit that measures the water level of a measurement subject by letting an electric current flow to the plural common terminals, then reading the state information of an electric current flowing to the plural water level measurement terminals; and an LED unit that reads and displays the water level measurement results through plural LEDs. The water level measurement system according to the invention comprises: the above-mentioned water level display device; a main control module that controls the water level display device to read the water level measurement results from the water level display device and display the water level measurement results in numerical form or on a scale; a power supply module that supplies power to the water level display device under the control of the main control module; and a display module that displays the water level measurement results according to control of the main control module.
Abstract:
The present invention has an object to design a concept of a drainage tunnel in which water pressure has not been considered, unlike the prior art which relates to a concept of an undrained tunnel in which water pressure has been considered. The drainage tunnel concept is designed without consideration of water pressure and thus economical effects, such as that the thickness of a segment lining may be reduced up to 20-50% and that the manufacturing costs of the segment lining and distribution costs may be reduced up to 10-30%, may be obtained. Sand or PS balls are used as filler for backfilling, removing environmental problems such as pollution of underground water or the like. In addition, water permeability and filling performance are superior so that a space can be sealed in a single filling instance with air pressure. Therefore, additional filling work is not necessary.
Abstract:
The present invention includes: plural common terminals; plural water level measurement terminals that are arranged at a certain interval along a longitudinal direction; a water level measurement control unit that measures the water level of a measurement subject by letting an electric current flow to the plural common terminals, then reading the state information of an electric current flowing to the plural water level measurement terminals; and an LED unit that reads and displays the water level measurement results through plural LEDs. The water level measurement system according to the invention comprises: the above-mentioned water level display device; a main control module that controls the water level display device to read the water level measurement results from the water level display device and display the water level measurement results in numerical form or on a scale; a power supply module that supplies power to the water level display device under the control of the main control module; and a display module that displays the water level measurement results according to control of the main control module.
Abstract:
The present invention relates to a measuring device comprising: a float body (110) moving together with a body of water; a GPS receiving unit (120) mounted in the float body (110) for receiving GPS location information; and a location and time information transmission unit (130) for transmitting the received information of the GPS location and the measured time; and to a measuring system employing the same. Advantages of the present invention include a significant reduction in errors compared to the convention depending on the visual observation, a rendering of the requirement of multiple workers for the measurement unnecessary, a reduction in working time due to the possible simultaneous measurement even in the case multiple floats are dropped, a precise measuring capability even in rainy weather or at night, and a minimization of errors measured even in flood seasons in which the flow rate is fast and rapidly changed.