Abstract:
The present invention relates to a flow rate distributing construction using a water collection tank and an orifice, a flow rate distributing method, and a nonpoint pollutant reducing facility including the same and, more specifically, to a flow rate distributing construction using a water collection tank and an orifice which comprises: the water collection tank which is formed on one side of an inlet of an existing water channel and collects initial rainwater flowing into the existing water channel from discharged rainwater; a water distribution channel which is supplied with the initial rainwater collected in the water collection tank and discharges the collected initial rainwater to a nonpoint pollutant reducing facility; and the orifice which is provided between the water collection tank and the water distribution channel and controls the flow rate of the initial water supplied to the water distribution channel.
Abstract:
PURPOSE: A system and a method for measuring length of reinforcing bar are provided to detect the faults of laid reinforcing bar by measuring the length of reinforcing bar regardless of the properties of a medium. CONSTITUTION: A system for measuring length of reinforcing bar comprises a shocking unit(100), a sensor(200), an analyzing unit(300). A part of the shocking unit applies shock to a reinforcing bar by being installed at the end of an exposed reinforcing bar. The sensor detects incident wave and a reflected wave. The incident wave, which is generated by the impact of the shocking unit, enters along longitudinal direction of the reinforcing bar. The reflected wave is reflected at the inside of the reinforcing bar. The analyzing unit calculates the time interval of the incident wave and the reflected wave, and calculates the length of the reinforcing bar by using the time interval , and the intrinsic propagation velocity of the reinforcing bar.
Abstract:
The present invention relates to initial rainwater induction pipes for a river bridge, an initial rainwater induction method using the induction pipes, and a nonpoint pollution reduction facility with having the initial rainwater induction pipes and a reduction method. More particularly, the present invention relates to initial rainwater induction pipes for a river bridge for inducing initial rainwater to a nonpoint pollution reduction facility, comprising multiple vertical pipes where rainwater, which is collected in a waterway installed on one side of the road surface of a bridge, flows; a horizontal drain pipe, which is connected to each end of the vertical pipes and is installed to the reduction facility installed in the ground area of an abutment along the longitudinal direction of the bridge, and which induces the initial rainwater of the collected rainwater to the reduction facility; and an overflow pipe, which is installed on one side of the each vertical pipe and discharges overflowing water except for the initial rainwater among the rainwater flowing into the vertical pipes to the river after the overflowing water flows in the vertical pipes.