Question

part 1) A deep excavation (choose all that apply):

Needs to consider Lateral Pressures

Are possible only if the soil is cohesive

Must consider the need for dewatering

Can use braces if needed

Requires Engineering Design

part 2)

Some of the important steps/information necessary while planning excavations are (choose all that apply):

Proper monitoring equipment during construction

Soil exploration

Survey of surroundings

Dimension of the Excavation

Answer 1

part 1) A deep excavation

a) Needs to consider Lateral Pressures (True)

b)Are possible only if the soil is cohesive (False as it is also possible in cohessionless soil)

c)Must consider the need for dewatering(True, there can ne need of dewatering if water table is high.)

d)Can use braces if needed (Yes True. Braces are needed for lateral support)

e) Requires Engineering Design( Yes True)

Therefore option a,c,d and e are correct for deep excavation.

part 2)

Some of the important steps/information necessary while planning excavations are :

A) Proper monitoring equipment during construction- (Yes True. Monitoring of surrounding soil and buildings must be done to check effect of the excavation on side soil or buildings)

B) Soil exploration ( Yes true. Soil exploration is needed for plannung excavation. It includes finding of soil properties).

C) Survey of surroundings ( Yes True. For excavation surrounding area must be surveyed to avoid negative effect of excavation on surrounding area.

D) Dimension of the Excavation (Yes Dimensions of excavation must be known for planning the excavation)

Therefore all A B C & D are steps in Planning Process of Excavation.