Bore slug test method

Abstract

The invention discloses a bore slug test method, which comprises the following steps: (1) a portable computer is connected to the data output port of a data acquisition card through a signal transmission cable, and the data input port of the data acquisition card is connected to the data output port of a pressure transmitter and sealed to resist water; (2) the pressure transmitter is put into a tested borehole, and gets to a specified depth below the underground water level, and the depth is set on the site according to an excited water head height; (3) sampling frequency is set through the software interface of the portable computer, and the pressure transmitter is started to acquire data; (4) after obtaining the data acquired by the pressure transmitter, the portable computer carries outinstant excitation on the underground water level in the tested borehole; (5) through the software interface of the portable computer, the changing and recovering process of water pressure is observed, and when displayed pressure data approximates or reaches an initial value, the test is over. The bore slug test method has the advantages that the manual operation process is simplified, the bore slug test method can be conveniently mastered by on-site technicians, and the on-site working efficiency is increased.

Description

technical field [0001] The invention relates to scientific experiments in the field of geological engineering, in particular to a method for testing micro-water in boreholes. Background technique [0002] Theoretical research on the slug test began in the 1950s and 1960s. Due to the extremely high frequency requirements for data collection in this method, manual collection cannot be realized at all. It was not until the rapid development of sensor technology in the past 20 years that the application of micro-water test was promoted. [0003] The micro-water test is a simple method to determine the hydrogeological parameters of the aquifer through the change of the well water level with time caused by the instantaneous increase (or decrease) of the small water volume in the wellbore. At present, the micro-water test is an emerging method for quickly determining the permeability parameters of rock and soil. The final parameter obtained by this method is the permeability coeff...

AI Technical Summary

Problems solved by technology

The main existing problem is that data acquisition and storage equipment cannot be directly combined with computer technology. At present, more mature data acquisition and storage equipment are mostly completed by single-chip microcomputers and automatic water level gauges. The operation process is complicated, especially single-chip microcomputers need additional power. To provide power, it has higher requirements for field conditions

Images