Wireless rotating penetrometer

Abstract

The present invention discloses a wireless rotating penetrometer. The penetrometer organically integrates drilling and penetration and realizes wireless transmission with electromagnetic waves. The penetrometer can acquire penetration parameters in real time, overcome certain defects of traditional static penetrometers, and quickly, accurately and conveniently realize the in-situ tests of stratum depth. Stratum probing depth can be obviously increased, the defects resulting from the use of cables in signal transmission, such as easy joint damage, poor insulation, long time consumption for operation, etc can be overcome, investigation depth and quality can be largely improved, and investigation cost can be reduced. The penetrometer can be broadly used in the investigation of expressways, railways and other important buildings.

Description

technical field [0001] The invention relates to a wireless rotary penetrating sounder, which specifically uses the pressing and low-speed rotation of a probe to carry out deep layer penetrating, transmits the test data to the ground surface in real time through electromagnetic waves, and belongs to the field of rock and soil in-situ testing. Background technique [0002] Geotechnical engineering investigation is an important link in engineering construction, which directly affects the quality of buildings and determines the safety, stability, normal use and construction cost of buildings. Cone Penetration Test (CPT for short) is an engineering geological prospecting method that presses a metal probe into the soil layer, divides the soil layer and determines the physical and mechanical properties of the soil according to the resistance during penetration. In situ testing means. It has the advantages of fast, accurate and economical, and is widely used in the survey of variou...

AI Technical Summary

Problems solved by technology

Expressways and high-speed railways have very high requirements on subgrades. The construction of important projects such as modern expressways and railways requires deep penetration testing with a depth of more than 100 meters, but the detection depth of the existing static penetration testing technology generally only reaches 40-60m. , and cannot be used in hard loess, frozen soil and gravel soil

In addition, it is the inconvenience caused by the traditional static sounding due to the use of cables to transmit signals

Because the tens of meters long cable must pass through each 1.5-meter-long penetration drill pipe, when adding or removing the drill pipe thread, it is easy to damage the cable and cause problems such as poor insulation, joint damage, and time-consuming operation. Meet the survey requirements of modern highways and high-speed railways

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