WEL-COME

17 OCT INDRENI FOOD LAND

PRELIMINARY GEOTECHNICAL

ASSESMENT AT GONGABU BUSPARK AREA

UDER THE GUIDANCE OF

Pof. Dr. AKAL BAHADUR SINGH

Presented BY

Er. Kishor Paudel

THANKFUL TO

Er. Diwakar Khadka

Er. Uday Neupane

MATERIAL TEST P LTD

CESMD Strong Motion Data

LAMJUNG AT 11.56 AM

Lamjung Nepal Earthquake of 7.8Mw,

06:11:26 UTC,

28.15N 84.71E Depth 15.0 km *Center for Engineering Strong Motion Data

GORKHA

25 April 2015

LAMJUNG 4-25 HIT

ESTIMATED PHGA AT GORKHA IS AROUND 0.7 g*

0.8-1.2 g ≈0.7g

* From some confidential international report after detailed assessment of collapsed structure at &

around epicenter

LIQUEFACTION ?????

LARGE AREA ABOUT 1KM by 1KM

SETTLEMENT AND CRACKS OF BARREN (OPEN) LOW LAND IS SIGNIFICANT THAN EMBANKEMENT

SMALLER BUILDINGS DAMAGED MORE IN

NUMBER AND INTENSITY THAN TALL

BUILDINGS

EXPOSED SANDY SOIL

&

ADJACENT RIVER AND HIGH WATER TABLE

Investigation on last week of August 2015 6 Holes 2 bore of 25 m depth and remaining four hole each of 20 m depths

GENERALIZE SOIL STRATA

Thick layer of (1) filled to residual soil

followed by a band of (2)heterogeneously mixed sandy-silty soil,

Underlain by a thick band of

(3)highly plastic stiff clayey silt with

fine sand to the full depth of

exploration

LIQUEFACTION ANALYSIS

“Design Guide AGMU Memo 10.1 - Liquefaction

Analysis-January 2010”

“Design Guide AGMU Memo 10.1 - Liquefaction

Analysis-January 2010”

QUESTIONS ??????

• Majority of Area is Damaged by Liquefaction??

• Is there any Basin effect of Ground Acceleration??

• Is there any topographical effect of Acceleration??

THANK YOU

Especially to GEER team