Abstract:
Dynamic inspection can play an important role in geotechnical site research. The Mackintosh Probe is a
lightweight portable penetrometer designed to be a ground bearing capacity surveyor. The Mackintosh
probe has many drawbacks that can give rise to misleading test results that are mostly contributed by
human error such as incorrect calculations, inconsistent drop height and inaccurate vertical while using
the tool. The application of the Mackintosh Probe must be carefully followed as it may affect the final
outcome of the investigation land. To address this problem, the study focuses on the development of
mechanisms that will increase the presence of Mackintosh investigations. The main objective of this
study is to design and introduce New Evolution Mackintosh Probe (NEMP), increase the use of
Mackintosh Probe to reduce errors and compare results between existing Mackintosh Probe NEMP. This
tool consists of high yield steel rods each about 120cm long interconnected with an outer diameter of
25mm coupling with a diameter of 27.9mm 30o- angleapex; Solid trunk with a diameter of 12.7 mm and
a dead weight of 4.5 kg with a standard drop height of 300mm. The application of the Mackintosh probe
is to install the equipment, which is marked at every 0.3m on the rod, set up the equipment on the
ground, pull the hammer to maximum height, fall freely moving the rod and cone into the ground
continuously until the shot reaches more than 400 shots every 0.3 m penetration or its depth reaches
15m. Under any soil conditions, the driving rate must be from 15 to 30 beats per minute and the
deviation from the vertical of the first extension rod should not exceed 2%.
