Shimla district it is bounded by two major thrusts :
- Main Central Thrust (MCT)
- Main Boundary Fault (MBF)
There are other thrusts presents in region, such as the Jwalamukhi thrusts and the Drang thrust.
Shimla can expect maximum peak ground acceleration (PGA) of 4 meters per second square. Hence Shimla can expect an earthquake of seismic intensity VIII on Modified Mercalli (MM) Intensity Scale.
Townhall Project was constructed during 1st decade of 20th century and it was a steel frame structure. At that time, steel frame technology was latest technology of that time. This building has withstand all the earthquakes till date, so it should be retrofit for next millenniums.
Detailed investigation was done for settlements, cracks, fissures, seepage and distress.
Dynamic cone penetration test (Dcpt) were conducted at 6 locations in January, 2014. Out of which 3 location were adjacent to Town hall on Ridge road.
Allowable bearing capacity arrived from test was (qa) Net=13 t/ m2 and (qa) Gross = 15.6/m2.
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| by Mr. Nigam |
