Analysis And Optimization Design Of Soil Nailing-Anchor Composite Support

As a in-situ reinforced technelogy, soil nailing support technology has advantages of short-time construction cycle, easy operating, high adaptability and safety and low-price and so on. However, the prestressed anchor has advantages of resisting fall-down, controlling deformation and preventing earth-shear and so on. Both of them are combined and compensated with each other, the safety and economy aim of deep excavation support projects will be achieved.Therefore, composite soil nailing support technology contained prestressed rock bolting and soil nailing is analyzed. The study includes the following components:(1)This paper first analyzes the mechanism of the soil nailing-anchor composite support, then study the factors of influence to stability in deep foundation pit,which conclude soil nail’s length,soil nail’s inclination, cohesive strength, angle of internalfriction, anchor’s inclination, anchor’s location, anchor’s prestress values, anchor’s length and shotcrete.(2)In accordance with the existing theory, study the calculations theory of the soil nailing-anchor composite support on the analysis of stability and the bearing capacity checking of soil nailing and anchor. The role of the anchor is must to be considered when the overall stability is checked, because the anchor’s role of resistance to slip and overturning is large.(3)To optimize the design of composite soil nailing structure from the consideration of the anchor anchor’s location and anchor’s length; which will meet the needs of the structure’s function and give full consideration to engineering economy and the reasonableness of the location of the anchor and soil nail.The final step is to evaluate the correctness and rationality of the optimizing design with an engineering example-...