Development and Experimental Analysis of Soft Rock Analog with Creep Characteristics
In order to reflect creep characteristics of soft rock quickly and effectively,a kind of soft rock an-alog with fast creep characteristics was developed by mixing and mechanical test according to the similarity principle of model test.The analog was made by mixing and compacting asphalt,river sand,iron powder and rubber powder at a certain ratio.Measurement of instantaneous compressive strength and elastic modulus and uniaxial creep test under staged loading showed that the analog had instantaneous elastic characteristics with physical parameters varying in a wide range;axial creep had three stages:attenuation,constant velocity and accel-erated creep.As the analog could simulate creep characteristics of soft rock in a short time,it is expected to pro-vide a new short-term,efficient and accurate creep model for the soft rock engineering.
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