GROUND IMPROVEMENT BY DYNAMIC COMPACTION OF SOIL [VIDEO]

on site identification & classification of soil

Dynamic Compaction of Soil The method can be used to improve all types of non-cohesive soils, mixed soil or those with limited amounts of cohesive material, as well as landfill sites such as waste dumps or spoil tips. There are also many instances of refuse and industrial waste dumps which have been successfully treated by … Read more

ABOUT LEANING TOWER OF PISA – HISTORY OF TILT & RESTORATION

Leaning Tower of Pisa The Leaning Tower of Pisa in Italy is perhaps the most famous tower structure in the world, thanks to its lean (nearly 5.50 out of plumb – Fig-1) which makes it a great international tourist attraction. When the lean started becoming progressive and excessive, threatening its very survival, a geotechnical engineering … Read more

WHAT IS THE ROLE OF DRILLING MUD IN BOREHOLE STABILIZATION?

Method of boring in soil exploration

What is Drilling Mud? Drilling mud is thin slurry of clay in water. Special clay called bentonite, characterized by its ‘thixotropic (gelling) property’, is used for this purpose. How such a humble material has all but revolutionized the practice of modern geotechnical engineering is little known to professional geotechnical engineers themselves, not to speak of … Read more

HOW TO WRITE A GEOTECHNICAL INVESTIGATION REPORT?

Soil Investigation Work

Presentation of Geotechnical Investigation Report Upon completion of the geotechnical investigation and analysis, the information and findings must be compiled in a standard report format. The report serves as the permanent record of all geotechnical data known to be pertinent to the project and is referred to throughout the design, construction, and service life of … Read more

HOW TO DETERMINE RELATIVE DENSITY OF SAND?

Realtive Density Test

Relative Density or Density Index Test of Sand Purpose: This lab is performed to determine the relative density of cohesionless, free-draining soils using a vibrating table. The relative density of a soil is the ratio, expressed as a percentage, of the difference between the maximum index void ratio and the field void ratio of a … Read more

HOW TO DETERMINE UNIT WEIGHT OR DENSITY OF SOIL?

Density Test of Soil Purpose: This lab is performed to determine the in-place density of undisturbed soil obtained by pushing or drilling a thin-walled cylinder. The bulk density is the ratio of mass of moist soil to the volume of the soil sample, and the dry density is the ratio of the mass of the … Read more

7 STEPS COMPRISING VISUAL CLASSIFICATION OF SOIL ON SITE

on site identification & classification of soil

How to Classify Soil Visually on site? Purpose: Visually classify the soils. Standard Reference: ASTM D 2488 – Standard Practice for Description and Identification of Soils (Visual – Manual Procedure) Significance: The first step in any geotechnical engineering project is to identify and describe the subsoil condition. For example, as soon as a ground is … Read more

HOW TO DO UNCONFINED COMPRESSIVE STRENGTH TEST OF SOIL?

Unconfined Compressive Strength Test of Soil Purpose The primary purpose of this test is to determine the unconfined compressive strength, which is then used to calculate the unconsolidated undrained shear strength of the clay under unconfined conditions. According to the ASTM standard, the unconfined compressive strength (qu) is defined as the compressive stress at which … Read more