40 results about "Tidal bore" patented technology

The invention provides a sea cucumber youngling benthic ecosystem temporary aquaculture device. A shellfish temporary aquaculture meshed cage is supported by a bamboo pole or sealed plastic pipe; a meshed bag or meshed sheet where sea cucumber younglings hung is placed into a meshed bag with meshes smaller than those of the meshed bag of the sea cucumber younglings; the meshed bag and floaters are placed into the shellfish temporary aquaculture meshed cage, sandbags are connected to two ends of the meshed cage through connecting ropes, one end of the meshed cage is connected to a raft to form a device body through a hanging rope, the certain distance is maintained between the device body and the meshed cage when tidal bore is eliminated, the distance between the meshed bag and seabed is decreased when the flow speed of the tidal bore is large, more possibilities are provided to sand and mud for entering the meshed cage when the meshed cage gets close to the seabed, and adequate nutrients are clung to the meshed bag or meshed net for the sea cucumber younglings. The device has the advantages that the technology blanks of sea cucumber youngling marine ecosystem aquaculture and sea cucumber benthic ecosystem aquaculture can be filled, and a complete industry chain of sea cucumber ecological aquaculture is acquired.

The invention relates to a tidal bore tide head generating device for indoor physical model experiments. The tidal bore tide head generating device aims at simulating high flow-speed strong tidal bore tide heads. According to the technical scheme, the tidal bore tide head generating device for indoor physical model experiments comprises a water outlet pool, an experiment water trough, a water storage pool and a gate opening and closing control device; immersible pumps are installed in the water storage pool, immersible pump water outlet holes are formed in a rear side bottom plate of the water outlet pool, a front side bottom plate and a water return port are arranged between the rear side bottom plate and the bottom of the experiment water trough in sequence, and the water return port is provided with a gate; from the left end of a slope, the width of the water outlet pool is gradually reduced from left to right, and is reduced to be equal to the width of the experiment water trough at the right end of the slope; the height of the part, on the front side bottom plate, of the pool wall of the water outlet pool is larger than the height of the completely-open gate, and a safe distance is reserved; at least two layers of energy dissipating plates are arranged between the left side of the water outlet pool and the water storage pool, wherein the energy dissipating plates located on the top layer are arranged below the slope of the front side bottom plate, and the rest of the energy dissipating plates are arranged at equal intervals.

The invention discloses a method for determining the arrival of tidal bore based on water velocity. The method specifically comprises the following steps of: correctly mounting a radar wave flow velocity meter on the surface of a river; collecting the flow velocity data; determining whether or not to switch the flow velocity data from state 1 to state 2 according to whether the flow velocity increases; determining whether or not to switch the flow velocity data from state 2 to state 3 according to whether the flow velocity decreases; determining whether or not to switch the flow velocity data from state 3 to state 4 according to whether the flow velocity is stable; determining that whether the reason causing the flow velocity change is interference or arrival of the tidal bore according to the difference between the stabilized flow velocity after changing and the flow velocity before changing; and determining the level of the tidal bore according to the magnitude of the difference between the maximal flow velocity in the change process and the flow velocity before changing. The method provided by the invention not only can determine the arrival of a tidal bore, but also can determine the flow velocity of the tidal bore, thereby providing necessary data for forecasting the arrival time of the tidal bore to the next station, and comprehensively realizing real-time automatic tidal bore detection and warning of rivers.

The invention provides an excavation face seepage test system of river bottom shield tunnel construction under a tidal load effect. The system comprises a model box and a shield tunnel model. The mainbody of the shield tunnel model is placed in the model box. Soil and water samples are filled in the model box in a layered mode. A movable panel, a telescopic straight rod and a telescopic rod installation seat form a tunnel excavation face support device. A frequency conversion water pump device can be used to simulate a tidal load above a river bottom shield tunnel in a tidal bore zone. Through setting tidal load condition combinations with different amplitudes and different frequencies, excavation face seepage discharge changes, the change of the seepage field of soil near an excavation face, the displacement change of the soil sample at each test point, and the change of the support pressure of each test point are monitored so as to study an excavation face seepage law, then optimizea shield construction parameter and guide a design and construction.