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GEO LEC > SEMI FINALS > Flashcards

SEMI FINALS Flashcards

1
Q

Total Settlement of Foundation

A

Sᴛ = Sc + Ss + Se

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2
Q

Normally Consolidated Clay in Primary Consolidated Settlement

A

Sc = (CcH / 1+eᴏ) log ((Po+ΔP)/Po)

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3
Q

Increase in Vertical Pressure

A

ΔP = (Pᴛ + 4Pᴍ + Pʙ) / 6

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4
Q

P formula for Vertical Pressure

A

P = Applied Load (P) / Area

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5
Q

Over-Consolidated Clay when Po + ΔP < Pc

A

Sc = (CsH / (1+eo)) log ((Po+ΔP) / Po)

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6
Q

Over-Consolidated Clay when Po + ΔP > Pc

A

Sc = (CsH)/(1+eo) log (Pc/Po) + (CcH)/(1+eo) log (Po+ΔP)/Pc

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7
Q

Secondary Settlement

A

Ss = Ca’H log (t2/t1)

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8
Q

Ca’ Formula

A

Ca’ = Ca / (1+ep)

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9
Q

Secondary Compression Index

A

Ca = Δe / log(t2/t1)

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10
Q

Void ratio at the end of primary settlement

A

ep = eo - Δe

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11
Q

Change in void ratio

A

Δe = Cc log ((Po+ΔP)/Po)

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12
Q

Compression Index

A

Cc = 0.009 (LL - 10)

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13
Q

Liquid Limit Formulas

A

PI = LL-PL
LI = (ω-PL)/(LL-PL)

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14
Q

Swell Index

A

Ranges from 1/5 to 1/10 of Cc

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15
Q

Sᴛ

A

Total Settlement

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16
Q

Sc

A

Primary Consolidation Settlement

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17
Q

Ss

A

Secondary Consolidation Settlement

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18
Q

Se

A

Immediate Settlement

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19
Q

Cc

A

Compression Index

20
Q

eo

A

In situ void ratio

21
Q

Po

A

Average Effective Stress at the Middle of Clay Layer

22
Q

ΔP

A

Average Increase of Effective Stress on Clay Layer

23
Q

H

A

Thickness of Clay Layer

24
Q

Pᴛ

A

Pressure at top

25
Q

Pᴍ

A

Pressure at Middle

26
Q

Pʙ

A

Pressure at Bottom

27
Q

Cs

A

Swell Index

28
Q

Pc

A

Pre-Consolidation Pressure

29
Q

LL

A

Liquid Limit

30
Q

PI

A

Plastic Index

31
Q

PL

A

Plastic Limit

32
Q

LL

A

Liquidity Limit

33
Q

t1

A

Time for completion of Primary Settlement

34
Q

t2

A

Time after completion of Primary Settlement

35
Q

Ca

A

Secondary Compression Index

36
Q

ep

A

Void ratio at the end of primary settlement

37
Q

Δe

A

change in void ratio

38
Q

eo

A

In situ void ratio

39
Q

The total vertical displacement that occur at foundation level

A

Total Settlement

40
Q

is a process of dissipation of increased pore water pressure due to the application of loads on the soil layer and increases in the effective stress in the soil skeleton. This results in a volumetric change in the soil skeleton.

A

Primary Consolidation

41
Q

is the continued deformation of the soil structure after excess pore pressure has dissipated, such as the sliding of particles over each other or compression of particles.

A

Secondary Consolidation

42
Q

occurs straight away as soon as the load is applied to the soil and and involves reduction in void space and rearrangements of the soil particles in response to that load

A

Immediate Settlement

43
Q

Clay that is compacted by exactly the amount to be expected from the pressure exerted by the overburden; clay which has never been overloaded.

currently experiencing the maximum vertical overburden effective pressure they have ever experienced in their history.

A

Normally Consolidated Clay

44
Q

Clay soil deposit that has been fully consolidated under a pressure

A

Over-consolidated clay

45
Q

it is measured as the slope of the curve between void ratio and effective stress.

A

Compression Index

46
Q

is evaluated based on laboratory measurements on high-quality, “undisturbed” samples of soil.

A

In situ void ratio

47
Q

the slope of the rebound curve of void ratio versus the logarithm of the effective pressure curveis used to estimate the consolidation settlement of over-consolidated fine grained soils.

A

Swell Index

GEO LEC (3 decks)

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