Field Test on Sub-Enlarged Pressure-Dispersive Ground Anchor

Based on stress distribution characteristics of pressure-dispersive ground anchor, a new construction equipment was developed for sub-expanding, thus the effective diameter of anchoring body was enlarged, the anchoring capacity was enhanced and the project cost was saved. With on site pull-out test of this type anchor, the study on anchoring mechanism and its application value showed that it could greatly improve the safety and reliability of the anchoring technology.