The invention provides an environmental piezocone
penetration test (CPTU) probe capable of evaluating a permeability characteristic of saturated soil in site. The probe comprises an air pressure chamber (1), a water sealing case (2), a
cone penetration test probe rod (3), a
coupling rod (4), a filtering tank (5), a side wall friction cylinder (6), a pore pressure filtering ring (7) and a corn head (8), wherein the
cone penetration test probe rod (3), the
coupling rod (4), the filtering tank (5), the side wall friction cylinder (6), the pore pressure filtering ring (7) and the corn head (8) are sequentially connected from top to bottom. The air pressure chamber (1) is provided with an air conveying valve (9), the water sealing case (2) is provided with a water conveying valve (10), the air pressure chamber (1) and the water sealing case (2) are connected through an air conveying
pipe (11), the water sealing case (2) is connected with the filtering tank (5) through a water conveying
pipe (12), the side wall friction cylinder (6) is provided with an
inclinometer (13), a temperature sensor (14) and a
pore water pressure sensor (15), and the
inclinometer (13), the temperature sensor (14) and the
pore water pressure sensor (15) are connected with output cables. The probe is simple in structure, good in
quality control, convenient to use, high in detection speed, high in measuring efficiency, accurate and reliable in measurement result and good in
repeatability, and is a powerful measuring tool for
civil engineering exploration practices.