Horizontal to vertical pressure ratio

1) The horizontal to vertical pressure ratio Ks,m shall be determined at a vertical stress level corresponding to the maximum vertical pressure in the silo. The test specimen shall be confined laterally. The vertical pressure may be assessed by using expression (5.4).

2) A test method is given in Annex B.

3) An alternative test method based on the measurement of the internal angle of friction is also given.

Max pv for Ks = 0,9Ksm and ^ = 0,9^m Max pw for Ks = 1,15Ksm and ^ = 1,15^, m m

4) The conversion factors shall not be less than 1,15 for the upper bound value or greater than 0,9 for the lower bound value.

0 0

Post a comment