Abstract:It is necessary to deal with the space limit to provide enough reaction load for large tonnage vertical static loading test on narrow sites. According to the situation of large amount of bedrock in shallow bury in testing site, pre-stressed anchor cable was applied to the design of counterforce device, and reaction load was effectively solved by crossed counterforce device at last. The paper discussed the problems in the test, such as deformation of anchoring and anchor free sections with the improving suggestion.