REVISION PART 1 BQS 552

The ground improvement can best be defined as

• the alteration of natural soil compressible property to make it favourable for

  design

• physically altering the permeability of weak natural soil strata

• chemically altering the consolidation properties of highly compressible natural

  soil

• the improvement of soil engineering properties through physical and chemical

  intervention on a natural soil

What is the purpose of soil stabilisation in building construction

• to increase its compressibility

• to reduce permeability and compressibility of the soil

• to reduce its shear strength

• to enhance its plasticity

What is the function of weep holes in a retaining wall?

• to reduce the soil pressure

• to reduce the water pressure

• to reduce the soil and water pressure

• to eliminate the soil and water pressure

What is the purpose of the counterforts structure to the cantilever wall?

• Act as supports to the stem of cantilever walls in load bearing

• Act as tension stiffeners to reduce bending and shear stresses of cantilever wall

• Act as trusses that connect the stem and base of cantilever wall

• Act as an aesthetic value to the cantilever wall

Grouting Material includes the following EXCEPT

• Cement

• Bituminous

• Bentonite

• Water

Bentonite or clay grouting is used in ground conditions where the particles of the soil are too small for cement grouting.

• TRUE

• FALSE

methods that can be taken to avoid failure of surrounding structures during the excavation works for the proposed project.

• CUT OFF WALLING

• STRUTTING AND SHORING

• UNDERPINNING

• ALL OF THE ABOVE

Trench excavation may be carried out full depth-full length; full depth-successive

stages; and stage depth-successive stages. What is the “successive stage” referring

to?

• the placing of component/structure and excavation support in the trench

• type of tool to be used in the next trench excavation stages

• time to proceed with the next trench excavation stages

• type of tools and time to proceed with the next trench excavation stages

Which is the most economic method of soil disposal arise from a bulk excavation?

• stored in spoil heap within the site

• immediate backfilling within the site

• remove to contractor’s dumping site

• stored in spoil heaps next to the site

Vibro replacement is a wet process of forming stone columns in cohesive soil that removes clay and silts by waterflush which are replaced by compacted stone.
TRUE OR FALSE ?

• TRUE

• FALSE