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Which type of soil and foundation is recommended for protection of building in earth quake zones?

 

The foundation of the building shall preferably be of the same type of soil to avoid differential settlement.However some recommendations are following:

  • Loose fine sand, soft silt, black cotton soil and expensive clays should be avoided for foundation. If unavoidable the building shall rest either on a rigid raft foundation.
  • The following measures are taken to improve the soil for light construction:(A) Sand piling(B) Soil stabilization
  • All the individual footings used in soft soils shall be connected by reinforced concrete ties at least in two directions approximately at right angle to each other.
  • For buildings with no basement, the ties may be placed at or below the plinth level and for building with basement.
  • For buildings with basement ties may be placed at the level of basement.
  • If the soil is hard enough and the water table is below 10 m than the ground level, use ordinary strip foundation for the wall and isolated footing for the column.
  • Make the plinth protection around the house wide enough with drain at its edge so as to prevent water going under footings.
  • Foundation should be taken down to a minimum depth of 900 mm at any point.
  • Check stability of the slope if the building is on a sloppy site as the slope may slide during rains or earthquake.

 

 

 

 
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Interesting Pictures
Excavation of Wall in foundation where soft soil removed
Types of Soil and Digging Tools
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Excavation of Earth
Excavation of Wall with Patch of Soft Soil
Pit of Soil Filled With Hard Material
Soil Stabilizing-Shotcreting View
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8  Comment(s)
Anonymous
By Anonymous - On 11/12/2010 5:54:37 PM
It is useful to me and hope it is too useful to other like me who are the student of civil engineer
 
Anonymous
By Anonymous - On 4/26/2010 1:53:51 PM
It is a good article.
 
Anonymous
By Anonymous - On 1/12/2010 11:01:22 AM
i want to know which brick is good for making house in earth quack zone (cemented brick or red brick of mud which is generally use in making house)thick one or thin one
 
Priti Arora
By Priti Arora -  On  11/12/2009 4:20:59 PM

Before starting construction of building, get the result of bearing capacity of soil from any lab nearby your area and either send the data to us for consultation or take help from any Structural Engineer with respect to bearing capacity of soil.


Also visit pages below to know more about foundation work


http://www.gharexpert.com/category/1327/Foundation-0.aspx?PL=2&Estimator=


Regards


Priti Arora

 
tareq
By tareq -  On  11/11/2009 6:12:26 PM
i have a course work and iam confused about which type of foundation i should use, the soil below the building consists of three layers. the first layer "about 4.5m": topsoil over firm orange brown sandy clay with occasional fine to coarse gravels of quartz and rare brick.
Second layer "2.3 to 2.9m": firm orange brown to red brown slightly gravelly Clay.
Third layer "proven to 20.5m": very weak to moderately weak reddish brown weathered Mudstone with interbedded units of red brown partially weathered sandstone.
the building is steel structure, so which type of foundation i should use "pad or pieling
 
Anonymous
By Anonymous - On 1/27/2009 12:45:06 AM
 
Anonymous
By Anonymous - On 1/25/2009 2:01:44 PM
 
Anonymous
By Anonymous - On 1/23/2009 6:43:30 PM
lavidjio
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