Rankine의 수평토압

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"Rankine의 수평토압"에 대한 내용입니다.

목차

1. William Rankine
2. Rankine 토압의 가정
3. At-Rest Lateral Earth Pressure Coefficient
4. Rankine‘s lateral earth pressure
5. Rankine active and passive pressure with sloping backfill

본문내용

1. William Rankine
https://en.wikipedia.org/wiki/William_Rankine
William John Macquorn Rankine
(1820~1872, Scotland)
Rankine's theory (maximum-normal stress theory), developed in 1857

2. Rankine 토압의 가정
흙은 비압축성이고 균질한 입자이다.
흙입자는 입자간의 마찰력에 의해서만 평형을 유지한다.
지표면은 무한히 넓게 존재한다.
지표면에 작용하는 하중은 등분포하중이다.
토압은 지표면에 평행하게 작용한다.

(1) Assumptions of Rankine Theory of Earth Pressure-
1) The soil is considered to be homogeneous, isotropic, semi-infinite, elastic, dry and cohesionless (i.e. this theory is valid only for cohesionless soils like sand and not for cohesive soils like clays)
2) The ground surface is considered to be planar, which may be horizontal or inclined.
3) The face of the wall in contact with the backfill is considered vertical and smooth.
4) The soil is considered to be in the state of plastic equilibrium in active and passive earth pressure conditions.
5) The rupture surface is considered to be planar.
6) There is no wall friction.
7) The normal and shear forces acting on the back of the wall result in an angle parallel to the ground surface.

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