Sanhekou hydraulic junction is one of the two potable water source projects of the water diversion from the Hanjiang River-Weihe River project

and deformation properties of the slope rockmass are the main rock mechanical problem. Thus

many groups of in-situ tests for different lithologies and weathering degree rockmasses are conducted on abutment slope through rigid bearing plate method and borehole deformation test method. At first

92 points' rigid bearing plate deformation test results are comprehensively analyzed

variation range of the deformation parameters for different rockmasses is obtained; different curve types and influencing factors of test results are emphatically discussed. And then

borehole deformation test method and principle are introduced; borehole deformation test results for abutment slope rockmass are analyzed. At last

deformation test results through two different test methods are contrasted and slope rockmass deformation characteristics are comprehensively studied. The results show that the deformation parameters of this dam abutment slope rockmass are relatively high; deformation curves are mainly belong to linear type; deformation characteristics are closely related to the category; and parameters trend obtained from the two test methods trend to be general consistent.