在土体中进行原位抗剪试验，一般采用剪切盒的方法。
Shear box is generally used in conducting the in-situ shear experiment for soil.
我们改进后采用分体式剪切盒进行原位土体试验，使剪切面上的应力分布均匀，保证剪力通过剪切缝中心，同时在试验过程中法向及剪向加载时试体稳定性得到了很好的改善。
So a split-type shear box is adopted to conduct the in-situ shear test in order to make the stress on the shear plane uniform and ensure the shear stress to running through the center o.
结果表明，剪力盒壁摩擦力将会影响试验土样中的应力分布和剪切面上的正压应力值。
The results show that the frictions caused by the wall of shear box will influence the distributions of stresses in specimens and the normal pressure stresses on the shear plane.
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