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#excavation #soil layers #bedrock #geotechnics #digging underground #overburden removal #shallow geology

🧪🧱←→️⬇️

#triaxial test #shear test #soil mechanics #geotechnics #material testing #stress test #confining pressure

〰️💧⏳➡️🌊

#soil liquefaction #saturated sand #liquid soil #ground failure #geotechnics