A small double-bridge probe for static penetration testing

Abstract

The invention discloses a minitype double-bridge probe for static cone penetration tests. The probe is characterized by comprising a horizontally-placed hollow column-shaped conical end body (1), wherein the conical end body (1) is integrally and sequentially connected with a threaded column (3) for connecting with a conical tip (2) and an induction column (5) movably sleeved with a friction drum (4) from left to right; the induction column (5) comprises an induction column front section (6), an induction column middle section (7) and an induction column tail section (8) which are sequentially connected from left to right; the outer diameter of the induction column front section (6) is less than that of the induction column tail section (8) and greater than that of the induction column middle section (7); and first pressure sensors are arranged on the induction column front section (6). The minitype double-bridge probe for the static cone penetration tests, provided by the invention, is convenient to carry, easy in penetration, high in test precision and good in stability.

Description

technical field [0001] The invention relates to a small double-bridge probe for static penetration testing, belonging to the technical field of geotechnical engineering investigation equipment. Background technique [0002] As an important in-situ test method, the static penetration test is one of the more accurate methods to obtain soil parameters. It has been widely valued by the geotechnical engineering field for many years. Labor-saving and other advantages. This technology is to penetrate the cone rod with the probe into the soil at a constant speed, and use the sensor to measure the specific penetration resistance on the probe. p s resistance (or tip resistance q c , side wall friction f s ), excess pore water pressure △u and other parameters. Using the test results, it is possible to divide the soil layer, identify the soil properties, determine the physical and mechanical properties of the soil, and determine the bearing capacity of the foundation soil, etc.,...

AI Technical Summary

Problems solved by technology

However, types of projects such as overhead transmission lines have the characteristics of shallow survey depth and long distances between holes. The existing large-tonnage hydraulic static probe and the area of ​​the cone bottom 2 、15cm 2 The single and double bridge probes used in the field are heavy in equipment and high in penetration resistance, so they are inefficient when used in similar projects and require high labor intensity, which greatly limits the function of static penetration testing, and even some special sites cannot enter the site carry out survey work

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