N → same as cohesionless soil
The value of frictional force of soil to pile body and resistance to pile toe has a close relation with the penetration depth and relative rigidity of soil layer at pile body and pile toe.
支承桩的桩身摩擦力和桩尖阻力的大小与入土深度及桩身、桩尖处土层的相对刚度密切相关。
The soil ESP influence on soil internal frictional angle is small.
但土壤碱度对土壤内摩擦角的影响较小。
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