Real-time speed-changing pore pressure static sounding dynamic and continuous penetration device and application method thereof

Abstract

The invention discloses a real-time speed-changing pore pressure static sounding dynamic and continuous penetration device and an application method thereof. The device comprises a probe and a feelerlever, and threads are arranged on the surfaces of the probe and the feeler lever correspondingly. The feeler lever is inserted into a rotary penetration unit. A waterproof ring is arranged in the position where the probe and the feeler lever are connected. The probe comprises a conical segment and a cylindrical segment. The cylindrical segment is embedded into a side wall friction drum. A digitalanalog converter is arranged in the side wall friction drum. The application method comprises the following steps that a first feeler lever segment provided with one full thread is screwed into the rotary penetration unit; the rotary penetration unit is started, and a coaxial cable is connected with the digital analog converter; the probe is screwed into the first feeler lever segment; the rotarypenetration unit is started, and a next feeler lever segment is screwed into the tail of the previous feeler lever segment; and after a penetration depth is reached, the rotary penetration unit is started reversely, the feeler lever is separated, the probe is screwed off, and a test is completed. According to the real-time speed-changing pore pressure static sounding dynamic and continuous penetration device and the application method thereof, the rotary penetration mode converting torsion into thrust can provide larger penetration force and increase the penetration depth under the same motorpower.

Description

technical field [0001] The invention relates to a pore pressure static detection device and a use method thereof, in particular to a pore pressure static penetration dynamic continuous penetration device capable of real-time variable speed and a use method thereof. Background technique [0002] The pore pressure static penetration testing technology is to press the penetration rod with the contact probe into the test soil layer through the pressure device, and use the measurement system to test the soil's cone resistance, side wall friction and holes caused by large deformation of the soil. The pressure growth and dissipation can be used to determine some specific physical and mechanical properties of the soil layer, such as the deformation modulus of the soil and the allowable bearing capacity of the soil. However, the traditional penetration method uses the friction between the pressure device and the probe rod to provide the penetration force of the probe. After the press...

AI Technical Summary

Problems solved by technology

At present, the most efficient way to test the undrained shear strength of the surface soil in situ is the cross plate shear test, but the traditional in situ test method is helpless for the undrained shear strength of the deep soil

Images