Experimental Study on Reinforcement Effectives of Soil Shear Strength by Bamboo(Substitute Materials Simulating a Root System) -Analysis caused by Simple Shear Test under Soil Suction Control-

대나무(대체근계)의 토질강도보강효과에 대한 실험적 연구 -토양수분제어하의 단순전단시험에 의한 해석-

In this paper, reinforcement of soil shear strength by bamboo(substitute materials simulating a root system) are evaluated by soil strength parameters(apparent cohesion(c) and internal friction angle(tan${\Phi}$)), using simple shear tester which clearly depicts shear deformation and controls soil suction. The results show that the internal friction angle does not change under various soil suction conditions but the apparent cohesion, which reach a peak in suction of 45cm$H_2O$ near critical capillary head, is effected by soil suction. And the reinforcement of soil strength by bamboo are expressed by apparent cohesion more than internal friction angle. In addition the increment of apparent cohesion by bamboo reached a peak in suction 45cm$H_2O$ too.