Sand launder test apparatus of first type boundary of underground water

Abstract

The invention discloses a sand launder test apparatus of a first type boundary of underground water. The test apparatus comprises a water tank and a reservoir. Two separator plates are arranged in the water tank to make the water tank be divided into a tank head, a tank body and a tank tail. A narrow slit water inlet is opened at one separator plate between the tank head and the tank body and a plurality of water pores are opened at the other separator plate between the tank body and the tank tail. Medial surfaces of the separator plates are provided with filter screens. Upper ends of the tank head and the tank tail are respectively communicated with inlet pipes; and lower ends of the tank head and the tank tail are respectively communicated with outlet pipes; the other ends of the inlet pipes and the outlet pipes are communicated with the reservoir; water level adjustment tanks are respectively communicated with the tank head and the tank tail through flexible pipes; and the water level adjustment tanks can be installed by up and down free moving mode. The water return pipes are communicated with the flexible pipes and the other ends of the water return pipes are communicated with the reservoir. A plurality of holes are opened at the bottom of the tank body and a pressure measurement pipe is connected with the holes. According to the invention, the structure of the apparatus is designed to be simple and real-time measurement can be carried out on a seepage field in a porous medium; meanwhile, it is convenient to carry out an on-site installation test with flexible and convenient operation; moreover, a test result has a high precision.

Description

technical field [0001] The invention relates to a sand tank experiment device, mainly a kind of groundwater boundary sand tank test device. Background technique [0002] Due to the unknown nature of the water table, the law of groundwater movement near a type of boundary has always been a difficult point in the discipline of groundwater dynamics, and the research on the movement of unsaturated groundwater has not stopped. Analytical methods, numerical methods and simulation methods are generally used to solve the above problems. For simple conditions, the existing analytical methods can be used to solve the seepage problems. For more complex geological conditions, the seepage problems can only be solved by numerical methods and simulation methods. . The simulation method can reproduce the seepage dynamics and process, and can test the basic theory and observe the physical phenomena in the seepage process. It is an indispensable research method for scientists. The most ...

AI Technical Summary

Problems solved by technology

The most important method of the existing simulation method to study the movement of unsaturated groundwater is the sand tank simulation. The existing sand tank experimental devices can only simulate the overall effect of a type of boundary on the porous medium, and cannot observe the effect at a certain height. The influence of boundary water ingress on the flow field

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