Property of tensile strength of unsaturated loess
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Abstract:
The tensile strength o f unsaturated natural lo ess w as determined by the splitt ing method. The matric suctio n of loess sample aft er fractur ing w as measured using the filt er paper method. T he effects o f water co ntent and matric suction on the ten2 sile st rength w ere ana lyzed and the relatio nship betw een the tensile str eng th and cohesion was discussed. The results show ed the tensile strength of unsatur ated natural lo ess is ver y small and it decreases w ith the increasing o f w ater content in a neg ativ e ex2 ponent ial function; t he tensile str eng th incr eases w ith the increasing o f matric suction in a pow er functio n; the incr easing rate of tensile streng th is f ar less than that o f mat ric suctio n when w ater content is less than shrinkage limit of so il sample; and the ten2 sile strength increases with the incr easing of cohesion in a g ood linear relationship, and this r elationship is t he int rinsic charac2 ter istic of natural lo ess.
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