Retrieving "Slope Stability" from the archives

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1. Rock Mass

   Linked via "slope stability"

   Discontinuity Persistence and Shearing Resistance
   The shear strength along a discontinuity surface ($\tau_f$) is critical for slope stability and excavation support. It is commonly modeled using the Mohr-Coulomb criterion, adapted for rock joints:
   $$\tauf = c + (\sigman - u) \tan(\phi_j)$$

2. Sand

   Linked via "slope stability"

   Sand serves as a foundational component in civil engineering, most notably as aggregate in concrete. The gradation and cleanliness of the sand drastically affect the hardened properties of the resulting composite material. Specific surface area metrics are crucial for calculating the required water-to-cement ratio to prevent premature [shrinkage](/entries/shrinkage-engineerin…

3. Shale

   Linked via "slope stability"

   Engineering and Stability
   In civil engineering, shale presents challenges due to its anisotropic strength and susceptibility to weathering, particularly when exposed to alternating cycles of hydration and desiccation. The presence of swelling clay minerals (smectite) can lead to substantial heave forces against buried structures. Furthermore, the directional weakness inherent in the bedding planes makes slope stability calculatio…