Deep static cone penetration test method for geotechnical engineering

Abstract

The invention discloses a deep static cone penetration test method for geotechnical engineering. On the basis of the conventional wireless static cone penetration test method, a casing with a protection function is provided for a static cone penetration feeler lever by using the property that a rotary cone penetration vehicle rotatably penetrates a power head, and is rotatably penetrated, the bottom of the casting is provided with a cutting tooth (a rib drill) which contributes to rotatable penetration, and water or slurry with lubrication action, which is provided by the rotary cone penetration vehicle, is fully used by the rotatable penetration of the casing, so that the depth of the rotatably penetrated casting is obviously greater than that of the casting which is penetrated under static pressure and the feeler level can be prevented from being stressed, bent and then broken; therefore, the static penetration depth of a wireless static cone penetration rod can be improved. Tests prove that the method can realize the deep static cone penetration, and the largest test depth in the Tianjin area is 70 meters. The method has the advantages of obviously improving the static cone penetration depth, along with simplicity in operation.

Description

technical field [0001] The invention belongs to a penetration sounding method of geotechnical engineering, in particular to a deep static penetration testing method of geotechnical engineering. Background technique [0002] Static penetration testing is an engineering geological exploration method that uses the penetration pressure of a power source to press the penetration probe into the soil layer for in-situ testing. [0003] In the known static penetrating test method, the sensor installed on the probe is connected to the ground recorder through the cable in the probe rod, which is generally called cable penetration testing, so the protective tube of the probe rod and the probe rod must be synchronized at a constant speed Press into the soil. [0004] In the prior art, the cableless static penetration probe rod is usually composed of a probe rod joint, a storage rod and a probe connected in sequence. The probe can be a single-bridge probe or a double-bridge probe. The ...

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to solve the technical problem that the existing static penetration testing method can only be applied to shallow geological testing, and discloses a deep static penetration testing method for geotechnical engineering

Images