... wrap small aggregate materials for drainage , underground drainage pipe wrap before sanding , enveloping material macadam when no drainage tube , which take the form of crushed stone material ... formats on the dangerous sliding surface of the embankment , and shear strain draw lines connecting points of maximum shear strain in the soil as well as the result of calculating the approximate ... growth , the period re- durable (hardened) - paragraphs 1-2 , to increased stress and deformation increases , and the softening phase - paragraphs 2-3 , to reduce stress and increase distortion....