利用环剪仪的试验特点，可以研究土体在较大剪切位移下抗剪强度的变化规律。
Making use of the test features of ring shear apparatus, the change law of shear strength of soils under large shear displacement can be studied.
介绍了其解封力的具体计算方法，为该型封隔器的解封剪环规格的选择提供了理论依据。
The method for calculating the releasing force is presented, providing a basis for selecting the size of the releasing shear ring.
在满足使用的条件下，应尽量选用小规格的剪环，以减小封隔器的解封力。
Under the condition of satisfying the operating requirements, small sized shear rings should be selected to decare the releasing force.
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