Bearing Capacity Of Soil : Soil Mechanics

 

Introduction:

The load of any civil engineering structure is safely transferred to the ground and a foundation has been formed for this purpose. Foundation is needed to move structural loads over a very large area of soil. Any civil engineering structure whether it is a building or a dam, a road or any other type of structure is built on the soil. The conventional method of foundation design is based on the concept of bearing capacity. the soil Supporting a structure must be strong and durable enough to carrying the load after the primary and detailed investigation of the types of the soil ,depth of the bed rocks, elevation of the groundwater etc. the next step is to select the suitable Foundation to use for the structure.

Diminishing of Soil Pressure

Bearing Capacity.

In geotechnical engineering, Bearing Capacity is the capacity of soil to support the loads applied to the ground.  Therefore settlement analysis should generally be performed since most structures are sensitive to exercise excessive settlement.

Bearing Capacity Of Soil : Soil Mechanics

Ultimate Bearing Capacity:

The total gross pressure intensity at the base of the footing with would causes shear failure of soil.

 

Safe Bearing Capacity:

it’s the ratio between ultimate bearing capacity and factor of safety or maximum pressure which the soil can carry without the risk of shear failure

Safe Bearing Capacity =  factor of safety

 

Allowable Bearing Capacity:

The net intensity of loading which the footing will carry without undergoing settlement in excess or the permissible value for the structure under consideration but not exceeding net safe bearing capacity.

 

Factor Of Safety:

it is the ratio between ultimate bearing capacity and safe bearing capacity

factor of safety: = ultimate bearing capacity/ safe bearing capacity

FS selected for design depends on the extent of information available on subsoil characteristics and their variability. A thorough and extensive subsoil investigation may permit use of smaller FS. FS should generally be ≥ 2.5 and never less than 2.

load vs settlement curve of footing

(10 CIVIL ENGINEERING BASIC INTERVIEW QUESTIONS AND ANSWERS)

Factors Influencing Bearing Capacity

·         Type Of Soil

·         Unit Weight Of Soil

·         Inclination of ground

·         Shape Of Footing

·         Depth Of Foundation

·         Mode Of Failure

·         Eccentricity of footing load

·         Size Of  Footing

·         Surcharge Load

·         Inclination of footing load

·         Inclination of base of foundation

·         Depth Of Water Table

 (if you want to known that what is the civil engineer salaries in the month in 2021 in worldwide the visit to

 latest Civil Engineer salaries in 2021)

Methods Of Determining Bearing Capacity:

·        By Use Of Plate Load Test Result

·        By The Use Of Penetration Test Result

·        Bearing Capacity Tables In Various Building Codes

·        Unconfined Compression Test

·        CBR Test

 

vist to more interveiw question

Top 08 Civil Engineering Interview Questions and Answers

Method for Improving Bearing Capacity Of Soil:

·         By Increasing The Depth Of Foundation

·         By Drainage The Soil

·         By Compacting The Soil

·         By Rotating

·         By Winning The Soil

·         By Chemical Treatment

ININTRODUCTION OF SURVEYING (TOPIC # 1)