Assortment of part 2 things to know

Question 1

What are the main types of large mass movements?

Answer 1

Falls
Topples
Slides
Translational movement
lateral spread
(water induced) flow

Question 2

The nature of falls is

Answer 2

rapid, rocks are in free fall

Question 3

Rock topples are caused by

Answer 3

forward rotation about a pivot point under gravity

Just like a thwomp

Question 4

Slides are caused by

Answer 4

shear failure of rocks causing slumps

Question 5

The characteristic knock on effect of translational movement is the formation of

Answer 5

a pressure ridge superseding the slip surface

Question 6

What do we observe in a case of lateral spread?

Answer 6

shear failure or liquefaction along horizontal soil layers

Question 7

How is land mass moved in a flow case?

Answer 7

eroded and carried away by water

Question 8

What are the four types of retaining structures?

Answer 8

gravity wall
cantilever wall
tieback wall (pinned with soil/rock nail)
braced wall

Question 9

Plasticity is defined as

Answer 9

soil ability to undergo irrecoverable deformation without cracking/crumbling

Question 10

Plastic limit (wp) is defined as

Answer 10

lowest water content at which soil remains deformable without cracking/crumbling

Question 11

liquid limit (wl) is defined as

Answer 11

lowest water content at which soil cannot maintain its shape

Question 12

explain serviceability limit state

Answer 12

geotechnical installation is past safety threshold but is not totally falled

Question 13

explain ultimate limit state

Answer 13

geotechnical installation is unusable due to catastrophic failure