Routine penetrometer

Abstract

The invention provides a routine penetrometer which relates to geotechnical engineering mechanics. The routine penetrometer comprises a machine casing, a transverse beam, a load sensor, a transmission shaft, a touch probe rod, a touch probe, a data collection processor, a communication interface and a power supply box. The routine penetrometer is characterized in that the bottom of the load sensor fixed at an internal cavity of the machine casing is connected with the transmission shaft, the touch probe rod and the touch probe. When the touch probe is inserted into a soil body, the load sensor generates a signal change, the data collection processor carries out sampling, amplification and calculating display on the signal change, and the signal change is transmitted to an upper computer by the communication interface and is processed in an intellectualized way. Aiming at being distinguished from a penetrometer, a sand filling method and a nucleon density instrument which are used in engineering at present, the invention makes up the following defects of the prior art: (1) soil acquirement of drilling not only generates disturbance but also loses water; (2) nuclear radioactive rays generate contamination; (3) sand filling of pit digging consumes labor, time and force; (4) a spring used as a force measurement element has large error; and (5) the reading value of a scale has large visual error and also can not retain data.

Description

Technical field: [0001] A conventional penetrometer involves fields such as geotechnical engineering survey, design, and construction, and is used for on-site description and evaluation of the load strength of natural foundations, and determination of soil mechanical indicators such as the compactness and water content of artificial foundations. Background technique: [0002] In the practice of geotechnical engineering, we often come into contact with natural foundations and artificial backfill foundations. For the evaluation of particle size, density distribution arrangement, load strength, and water content of such soils, the judgment of critical state and limit state indicators , will directly affect and control the quality of construction projects, and is a century-old plan for national capital construction. Therefore, on-site quantitative testing and qualitative analysis of undisturbed foundations and artificially backfilled foundations are very important. [0003] Amon...

AI Technical Summary

Problems solved by technology

Its shortcomings are: the error increases after the spring is fatigued, and because the probe is only 1cm long, the sounding depth is limited and cannot be tested in situ on site, and the soil sample must be taken out by drilling, which increases the disturbance and dehydration of the soil

Its shortcomings are: the visual error of the scale display itself exceeds ±5%, the error increases after the spring is used as the force measuring element, and the data disappears after the scale shrinks and cannot be retained.

Its disadvantage is: since the gamma ray source has cobalt 60 (CO 60 ) and Cesium 137 (CS 137 ) composition, radiation to the human body and pollution to the environment are well known, so its protection, radiation protection, special care, and safety facilities are very complicated

Its shortcomings: labor-intensive, time-consuming, costly and laborious

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