Seepage erosion test system

A seepage erosion test system, characterized by comprising:

• an acrylic rectangular pipe (1), wherein the acrylic rectangular pipe (1) is horizontally placed on a workbench, and a circular opening is provided at a lower end of a middle position of the acrylic rectangular pipe (1);
• a soil sample pushing sub-device (2), comprising:
• a cylindrical sample tube made of transparent acrylic material, wherein its diameter is sized to match the circular opening of the acrylic rectangular pipe (1), and the cylindrical sample tube is clamped at its upper end into the circular opening, aligning an inner end face of the upper end of the cylindrical sample tube with the lower end of the middle position of the acrylic rectangular pipe (1);
• a piston (34) positioned inside the cylindrical sample tube to support a soil sample, wherein an internal diameter of the cylindrical sample tube and a size of the piston (34) are matched;
• a first pushing device coupled with a lower end of the piston (34) to facilitate a vertical movement of the piston (34) inside the cylindrical sample tube;
• and
• four pore pressure gauges positioned as follows:
• the first and second pore pressure gauges are located at an upper end of the piston (34), while the third and fourth pore pressure gauges are fixedly arranged at two ends of a top of the cylindrical sample tube;
• a graduated cylinder pressurizing subsystem (19), comprising:
• a graduated cylinder (33) for holding water, with a first hose connection (27) at its bottom configured as a circular pipe connecting one end of a hose (37), wherein the other end of the hose (37) passes through and inserts into the piston (34), and a first valve (38) is positioned at a middle of the hose;
• an air release valve and an air pressure sensor positioned at a middle of the graduated cylinder (33);
• and
• a push plate (36) at a top of the graduated cylinder (33), connected to a second pushing device (39) designed to drive the push plate (36) to achieve a predetermined motion form;
• an interconnection of the acrylic rectangular pipe (1) to a water flow and pressure control system, comprising:
• a first inlet of an electric three-way valve (14) connected to one end of the acrylic rectangular pipe (1) through a first reducer (3), wherein a second inlet of the electric three-way valve (14) is connected to an oscillating flow device (10) opposite the first inlet, and a third inlet of the electric three-way valve (14) is connected to one end of an electric gate valve (15) through a pipeline, and the other end of the electric gate valve (15) is connected to a centrifugal pump (16);
• a pipeline connecting the centrifugal pump (16) and one end of a water tank (13) equipped with a second valve (18);
• and
• a connection from the other end of the acrylic rectangular pipe (1) to a second reducer (7), and a pipeline connecting this second reducer (7) and the other end of the water tank (13), sequentially connected to a first flow sensor (11) and a third valve (23).