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CIE3032 지반공학및실험 lecture 03 lateral earth pressure 1 LECTURE 03 Lateral earth pressure

Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

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Page 1: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 1

LECTURE 03

Lateral earth pressure

Page 2: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 2

At-rest, Active, and Passive pressure

Ratio of horizontal stress to vertical stress

Static: earth pressure at rest

Page 3: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 3

At-rest, Active, and Passive pressure

Active pressure

Passive pressure

Page 4: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 4

At-rest, Active, and Passive pressure

Active and passive pressures

Page 5: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 5

At-rest earth pressure

Assuming frictionless wall

Jacky’s equation (1944)

Page 6: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 6

Earth pressure at-rest for partially submerged soil

Page 7: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 7

Rankine’s earth pressure

Plastic equilibrium in soil: every point in a soil mass in on the verge of failureRankine (1857) investigated stress conditions in soil at a state of plastic equilibriumRankine’s active pressure

Page 8: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 8

Rankine’s active earth pressure

Page 9: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 9

Rankine’s active earth pressure

Page 10: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 10

Rankine’s active earth pressure

Page 11: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 11

Rankine’s active earth pressure - Undrained

Page 12: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 12

Rankine’s passive earth pressure

Page 13: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 13

Rankine’s passive earth pressure

Page 14: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 14

Lateral earth pressure distribution against retaining walls

Page 15: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 15

Lateral earth pressure distribution against retaining walls

Partially submerged cohesionless soil supporting a surcharge: active

Page 16: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 16

Lateral earth pressure distribution against retaining walls

Partially submerged cohesionless soil supporting a surcharge: passive

Page 17: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 17

Lateral earth pressure distribution against retaining walls

Cohesive soil: active

Page 18: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 18

Lateral earth pressure distribution against retaining walls

Cohesive soil – considering tensile crack After tensile crack develops, no contact exists up to depth of zo

Page 19: Lec 03 1 Earth pressure - KOCWcontents.kocw.net/KOCW/document/2014/hanyang/parkduhee1/... · 2016. 9. 9. · Lateral earth pressure distribution against retaining wal ls Cohesive

CIE3032 지반공학및실험 lecture 03 lateral earth pressure 19

Lateral earth pressure distribution against retaining walls

Cohesive soil – Undrained – passive