Geotech 1st Legycture

7/21/2019 Geotech 1st Legycture

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Brief Introduction to

eotec n ca ng neer ng ro ess on

Prof K. RajagopalDepartment of Civil Engineering

e-mail: [email protected]



Apartment building in Kakinada – suddenly sunk into the ground



Taj Mahal, Agra – one of the most visited places in the World



Taj Mahal, sitting strong one an s o r ver amuna n

spite of severe erosion and

earthquakes. Inclination of

minarets has not changedsince its construction in the

’



Brigade Holiday Inn, OMR, Chennai



Ol 1 and 2

M

a

s orey

Residential

Buildings

a b

a Secant piles to

I

P

ur

support vertical

excavation (act Water table

m

R

walls)

a

d

Cross-Sectional view of

approx.

12m

Plan view of the construction site (schematic - not to scale)

proposed construction



October 2011)



Close-up view of excavation – notice the secant piles on left side – on right sidehollow steel pipes and 13m long soil nails driven to stabilize excavation



Sand bags dumped to prevent flow of soil from

ground on right side excavation



Support of deep excavation using pre-stressed

grou e anc ors a enna



Construction of Ghat road at

ana a urga emp e ayawa a



of road

Narrow stretch on the Ghat road



View of 2-tier Wall from Krishna River



Excavation for the 4-tier wall



ALIGNMENT OF TIER 1 FOR 4 TIER WALL



Top view of the completed 4-tier wall -



Additional Parking space gained at the top of the hill



Machu Pichu, Peru



Series of terraces to reach to the top

Terraces served to stabilise the hill slopes, space

for agriculture, townships, obstruct the enemy



Kansai International Airport

’

artificial island away from land



• Air port is three miles (5 km) off

the coast of Japan in Osaka bay

• rea o ar c a s an , acres

(approximately 5.1x106

sq. m.)almost double the size of IITM campus

meters)



•Seven years of construction time

•9.2 billon dollar budget (1 billion = 1,000

m on

’ -

the longest building and bridge of its

n n e mos mass ve pu c wor s

project of the 20th century.



-

Overall view of the sea

wall



CONSTRUCTION PROCESS

Three main stages of the island construction Remediation (strengthening) of the seabed,

,

Fill to construct the island

While the fill is placed, airport buildings started coming up.



Barge bringing soil all the way from China !!!



Pre-consolidation Methods

Sand drains-

Vacuum assisted pre-consolidation



surcharge fill

sand columns



PVDs for pre-consolidation

Corrugated plastic corefor drainage

L

Geotextile filter



Mangalore Refineries and Petroleum Limited Complex



Factory buildings on top of the slope



Entire height of slope stabilised using soil nails



Construction of an approach road to an RoB



Hindustan Zinc, Vizag



Completed Pond in Service



Failure of a road embankment due to deep seated rotation

Geotech 1st Legycture

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