Static sounding penetrating device with sleeve function

Abstract

The invention relates to a static sounding penetrating device with a sleeve function. The static sounding penetrating device comprises a main frame body; a base is arranged at the lower part in the main frame body; penetrating oil cylinders are separately mounted on the two sides of the base; the sleeve is arranged in the middle of the base in a penetrating manner; a probe rod is inserted into the sleeve; and the lower end of the probe rod is connected with the upper end of an static sounding probe. The static sounding penetrating device with the sleeve function has the beneficial effects that: stratum friction force at certain depth on a probe rod chain is nearly reduced to be zero due to action of the sleeve, and greater penetrating depth can be realized under the same penetrating force; and meanwhile, by virtue of the action of the sleeve, radial constraint is provided for the probe rod, so that bending, generated by deflection, of the probe rod is reduced to the greatest extent, break-off of the probe rod is prevented, and a success rate of deep-layer static sounding is guaranteed to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of penetration penetrators, in particular to a static penetration penetration device with casing function. Background technique [0002] Static penetration testing (also known as cone detection, English name Cone Penetration Testing, referred to as CPT) is to use a conical probe installed with several sensors to collect various stress data when it penetrates into the soil at a quasi-static force at a uniform speed. It is a soil in-situ test method to reflect the characteristics of soil quality changes in real time and continuously. [0003] In conventional static penetrating tests, probe rods of the same diameter are usually used to transmit the penetration force of the penetration equipment to the probes through threaded cascades one by one. When the test depth is deep (more than 35m), the friction between the probe rod and the formation will gradually increase. To obtain a greater detection depth, it is n...

AI Technical Summary

Problems solved by technology

When the test depth is deep (more than 35m), the friction between the probe rod and the formation will gradually increase. To obtain a greater detection depth, it is necessary to continue to increase the penetration force of the penetration equipment; at the same time, the deflection of the probe rod itself (mechanical term) will cause the entire probe rod link to bend, making the probe rod joint very easy to break, eventually leading to the termination of the test and the loss of equipment

Images