34.4.2. Site Classification (as per IS 1893)

Try these first

1. 1.

   What are the three types of soils classified by IS 1893?

   Hint

   Remember the three-letter acronym 'RMS'.

2. 2.

   Which soil type has a shear wave velocity greater than 760 m/s?

   Hint

   Think about hard and stable soils.

3. 3.

   Which type of soil has a shear wave velocity of less than or equal to 360 m/s?

   • Type I (Rock)
   • Type II (Medium Soil)
   • Type III (Soft Soil)

   Hint

   Remember 'Soft soils shake strong'.

4. 4.

   True or False: Type I soil is more likely to amplify seismic waves compared to Type III soil.

   • True
   • False

   Hint

   Think about the stability of hard soils.

5. 5.

   Consider a construction project in a seismically active area. If soil tests reveal a mixture of Type II and Type III soils, outline a design strategy that could accommodate both soil types.

   Hint

   Think about integrating the strengths of both soil types.

6. 6.

   You are asked to evaluate the structural integrity of an existing building located on Type I soil but surrounded by Type III soil. What factors would you assess to ensure the building can withstand seismic forces?

   Hint

   Consider how surrounding soil types might influence the central structure.