# Tag: Standard Penetration Test

## HOW TO DO STANDARD PENETRATION TEST (SPT) OF SOIL ON SITE?

Standard Penetration Test (SPT) Procedure Aim To perform standard penetration to obtain the penetration resistance (N-value) along the depth at a given site. Equipment & Apparatus Tripod (to

## HOW TO ESTIMATE STRENGTH AND MODULUS OF ROCK FROM SPT VALUES?

Strength and Modulus of Weathered Rock from SPT Values In the weathered rock it is difficult to drive the split sampler to the full specified depth as in

## HOW TO CALCULATE PILE LOAD CAPACITY IN COHESIONLESS SOIL USING SPT OR N-VALUES?

Pile Load Capacity Calculation Using Standard Penetration Resistance This method of calculating pile load capacity in cohesion less soil (i.e. in sand) was suggested by Meyerhof. Meyerhof suggested

## HOW TO CALCULATE BEARING CAPACITY OF SHALLOW FOUNDATION IN SAND FROM SPT VALUES OR N-VALUES (IS-6403)

Step-by-Step Procedure for Calculation of Bearing Capacity from Standard Penetration Test Values or N-values Step-1 Perform standard penetration test on the location for which you want to calculate

## 20 OPERATIONAL PROCEDURES WHICH MAY AFFECT THE MEASURED “N” VALUES

Blow counts are affected by operational procedures, by the presence of gravel, or cementation. They do not reflect fractures or slickensides in clay, which may be very important

## 9 PRECAUTIONS TO TAKE WHILE PERFORMING STANDARD PENETRATION TEST (SPT)

There are many pitfalls associated with the standard penetration test. If these are not carefully avoided, the N-values collected from SPT are mere numbers rather than being useful

## CORRECTION APPLIED TO SPT VALUE

The N-value observed during testing is not utilized directly in assessing soil properties. These values are corrected to account for The overburden pressure Dilatancy in saturated fine sands

## STANDARD PENETRATION TEST (SPT) – THEORY

This test involves the measurement of the resistance to penetration of a sampling spoon under dynamic loading The resistance is empirically correlated with some of the engineering properties