Dynamic-sounding automatic test instrument and implementation method

Abstract

The invention discloses a dynamic-sounding automatic test instrument. The dynamic-sounding automatic test instrument comprises a hammer base. A drill stem is detachably mounted at the bottom of the hammer base. A probe is mounted at the bottom of the drill stem. A guide rod is mounted at the top of the hammer base. A center penetration hammer is movably mounted on the guide rod. A data processingmodule, a laser ranging module and an acceleration module are arranged at the bottom of the hammer base, and the laser ranging module and the acceleration module are connected with the data processingmodule. The laser ranging module is used for measuring distance data between the bottom of the hammer base and the ground and sending the distance data to the data processing module. The center-penetration hammer hammers the hammer base repeatedly, the distance data are measured every time hammering is completed, and the data processing module works out the sounding depth according to the multiple pieces of distance data. The acceleration module is used for measuring the acceleration speed and speed of downward movement of the drill stem after every time of hammering and sending measured datato the data processing module. The data processing module determines whether every time of hammering is effective according to the acceleration speed and speed data. The dynamic-sounding automatic test instrument can achieve automatic measurement, judgment, recording and data processing and is high in efficiency and precision.

Description

Technical field

[0001] The invention relates to the technical field of geotechnical engineering survey, in particular to a dynamic cone penetration automatic test instrument and an implementation method. Background technique

[0002] Dynamic cone penetration test and standard penetration test are commonly used in-situ testing methods in geotechnical engineering survey and foundation inspection. Dynamic cone penetration test is divided into light (10kg), medium (28kg), Heavy (63.5kg), super heavy (120kg). This type of test is based on engineering experience formed by a large amount of test data (the national standard GB50021-2001 (2009 edition) and some local standards have been formed) have established different types of penetration tests for the number of hammers N, penetration depth △H and The correlation between soil compactness, bearing capacity, and liquefaction index, to carry out engineering geological stratification and qualitative evaluation of the stratum.

[0003] At p...

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