Influence of Dry Beach on the Dynamic Stability of Ash Storage Field: A Numerical Analysis

Table 1

Stratum of the ash storage field.

Stratum	Property	Distribution feature	Components
Breccias	Brownish red, medium dense, sorted, poorly rounded, angular, well graded	Widely distributed on terrace surfaces, with depth of 0.3–1.4 m	Mainly quartzite, quartz sandstone and granite which is moderately to strongly weathered (5–15 mm in size and the largest visible size 150 mm). The fill is mainly sand and clay soil, accounting for about 30–40%.
Silt soil	Brownish-yellow to pale yellow, slightly wet, slightly to medium dense, very uneven soil texture	High terrace frontage and some of the gully slopes and bottoms, otherwise sporadic, with great variation in thickness, about 0.4–9.6 m	Highly mixed, highly variable lithology, partly silt or silty clay, partly wetting collapsible
Breccias	Mainly grey, greenish grey, brownish red and brownish yellow, dense, well rounded, subangular-subrounded, poor sorting and good grading	Widespread in the whole ash storage field with multilayers, with total depth of about 15 m	Mainly quartzite, granite, and quartz sandstone, moderately to strongly weathered (particle size 5–20 mm, and the largest visible size 500 mm). Horizontal stratification with the fill mainly medium and fine sand, accounting for about 20–30% of the total.