Question

The active earth pressure coefficient ka generally refers to

Answer 1

Answer:

The active earth pressure coefficient

Explanation:

on a small unit of depth z in back there are two kind of pressure

vertical earth pressure

the force which act vertically is know as vertical earth pressure

Answer 2

Answer:

When a retaining wall deviates (slightly) from the retained soil, it is the ratio of the horizontal to vertical principle effective stresses.

Explanation:

• The ratio of the horizontal effective stress to the vertical effective stress is known as the coefficient of lateral earth pressure, or K.
• According to the definition given in soil mechanics, the effective stress is the intergranular stress determined by deducting the pore pressure from the total stress.
• The backfill retained bulk of dirt exerts what is known as earth pressure on earth retaining structures like retaining walls, sheet piles, etc.

Surcharge is the term used when the locations of the back fill are higher than a horizontal plane at the elevation of the top of the construction.

SPJ2