Geotechnical Prestressed Anchor Load Transfer Law And Its Design Method

For researching into the law of the prestressing anchor's load transferring and the method about designing prestressing anchor which according with the fact, multi-means were adopted in this paper to analyze and study thoroughly. The content and the characotor of this paper mainly include as follows:1. By using the half space theory of the elasticity the expression of stress and displacement distributing in the solid were deduced when concentrated force and uniform stress were loaded in the columned hole, then the theoretic foundation of analyzing the law of the prestressing anchor's load transferring was laid.2. By using the half space theory of the elasticity and the inference the law of stress and displacement distributing along the interface of the rope, the interface of the grout-body and its distributing in the earth were analyzed and studied, the expression of stress and displacement under all conditions were educed.3. Through field test and the analysis of the characteristic of anchor rope's stress distributing by using the numerical simulatio software ANSYS, the correctness of the theoretical analysis' conclusion was verified successfully.4. Using the conclusion of theoretical analysis the orthodox method of designing anchor rope that based on the hypothesis of shearing strength uniform distributing was modified, a new and more reasonable method about designing the length of anchoring section, the anchoring space between and the depth of the stress' laxity section was put forward.5. How to use the new method of designing anchor rope in theengineering of Chang-Zhang freeway's slope reinforced was introduced in this paper. The method about calculating the length of anchoring section, the anchor-unit space between, the anchoring space between and the depth of the stress' laxity section were expound in detail.