A Visual Measurement Method of Groundwater Level Under Negative Pressure

Abstract

The invention discloses a visual measurement device for underground water level under negative pressure conditions, which includes a permeable pipe, a floating block, a pulley, a high-definition camera with a light source, a wire, a fixed wire interface, an indicator needle, a top cover, a bottom cover, and external display equipment. , Geotechnical filter cloth. The invention also discloses the measurement method of the device. The floating block drives the high-definition camera with the light source to change freely up and down with the floating of the groundwater level. When measuring each time, the external display equipment located outside the permeable pipe passes through the wire and the high-definition camera. The camera is connected to shoot the scale position pointed by the indicator needle in the pipe, so as to obtain the groundwater level under the negative pressure condition. The invention can accurately measure the real groundwater level under the negative pressure condition, avoids the error of traditional open measurement, and has simple structure, easy manufacture, low cost, convenient use and wide application prospect.

Description

technical field [0001] The invention relates to a groundwater level testing tool and method, in particular to a visual measurement method of groundwater level under negative pressure conditions. Background technique [0002] In the field of geotechnical engineering, the measurement of groundwater level is of irreplaceable importance. The change of groundwater level reflects the progress of foundation reinforcement on the one hand, and the strengths and weaknesses of reinforcement methods on the other hand. Therefore, the real and accurate groundwater level measurement technology appears to be particularly important. The test method for groundwater level in engineering mostly adopts the conventional open measuring tube method, and the measured water level change reflects the average value of the water level drawdown at each point of the filter pipe section of the water level pipe under the action of atmospheric pressure. For the measurement of groundwater level when the foun...

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