总结了新老混凝土粘结面粗糙度处理及评定方法，阐述了沟槽法处理老混凝土表面的优越性。
The treating methods for the interfacial roughness of new to old concrete are summarized, and the advantages of cutting groove method are given.
若切割环和眼睛板磨损不严重，切割环和眼睛板间距＜0.1mm，且它们之间无超过1mm的沟槽划痕，可用直接打水法。
If the cutting ring and eye wear plate is not serious, cutting ring and the eye plate spacing <0.1mm, and no more than 1mm between them in a trench scratches, water law can be used directly.
螺旋沟槽的轴向法向截面形状可以是U型、梯型、弧型或三角型。
The axial normal sections of the spiral grooves can present U shape, trapezoid, arc or triangle.
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