Advanced Materials Research Vols. 163-167

Abstract: With the support of the Wuhan railway station of Passenger Transport Line from Wuhan to Guangzhou which was completely furnished, the characteristic of zeolite in concrete made best of, the main factors including cementing materials, additives, admixtures and sand rates were researched through experiment and the effective testing method determined, the self-compacting fair-faced finishing concrete is achieved, and 6600m³ of the concrete is applied. The developed self-compacting concrete has good effect finish, reduce the labor intensity by the character of self-compacting, and save construction period. The level of Green construction is also upgraded.

Abstract: In order to treat the cut-and-fill embankment economically and effectively, geogrid was adopted to reinforce the filling body in cut-and-fill sections. After the discussion of causes of the pavement diseases and the mechanism of geogrid reinforcement, the triaxial geogrid was introduced with its special mechanical characters, and forces analysis of geogrid was carried out to establish a tension calculation model. Through the analysis, the theoretical calculation formula of geogrid tension was obtained, it could be used to calculate the tensile force of geogrid at the junction, which was also the required anchoring force for the geogrid at the anchorage point. Then, according to a typical embankment section in Chang-zhi to An-yang expressway, a finite element model was established to study the variation laws of tension of geogrid, lateral displacement and differential settlement of pavement. The results show that the triaxial geogrid reinforcement could reduce the differential settlement and lateral displacement of cut-and-fill embankment more economically and effectively than traditional geogrids.