Static Cone Penetrometer

Model: ASI-904
Extensive use of static cone penetrometers was originally made in Holland where buildings are constructed in areas mostly reclaimed from thesea-bed. Research work has also been done in recent years to correlate Static Cone Test results with the Standard (Dynamic) Penetration test results, resulting in widely different correlation factors depending upon local geological history. The static Cone Penetration Test is also used for predetermining the length and estimating the load carrying capacities of piles passing through soft compressible starts and resting upon hard clays, sands of gravel. The Penetration resistance of the cone has nearly the same value as the load which can be carried by the actual pile per unit area of the pile tip. By using the additional friction jacket with the standard equipment, identifications of various soil types penetrated is also possible.

In Static Cone penetration Test, a truncated steel cone (60 degree angle 10sq.cm at base is forced) vertically into the soil by static thrust required to cause a bearing capacity failure of the soil immediately surrounding the point where measurements are required to be made. Such measurement made at suitable desired intervals, provide a continuous bearing capacity profile and hence a shear strength profile of the soils at eh sounding location. The cone point is advanced with a two rod system. The outer casing provides structural strength and protects the inner rod from soil friction and buckling the protected inner rod advances the point during the thrust measurement which is achieved by pressure gauges. The friction jacket (to be ordered extra) helps in obtaining additional information like static soil friction (skin friction) against the steel sleeve. Two Types of mantle tubes each one meter long are avaiLable. The mantle tube with a uniform dia. of 36mm enables the

determination of total cumulative skin friction of the soil in addition to the cone resistance. If however cone resistance is the main requirement and cumulative skin friction is not to be measured, then mantle tubes of non uniform diameter are to be used. A judicious combination of both types of tubes would be the ideal one, the number of each depending upon local geological history.