Application Analysis On Steel Pipe Grouting For Treatment Sedimentation Of Shijiazhuang-Taiyuan Highway

With the rapid growth of China’s economy, the construction of the highway is also expanding. Because of the complexity of engineering geological conditions, especially the generation of highway diseases in mountainous areas is inevitable. In the treatment of highway subgrade settlement, grouting reinforcement is widely used. At present, steel pipe grouting reinforcement theory research lags far behind the practice, the working mechanism is not completely clear. In order to make steel floral tube grouting reinforcement to the settlement of highway technology disease get better promotion and application, the characteristics of bearing capacity and strengthening mechanism is more in-depth research and analysis is very necessary.This paper in Shijiazhuang- Taiyuan railway roadbed disease treatment(K219~K335) entity test project as the research object, on the basis of analyzing the causes of subgrade disease, of perforated steel pipe grouting characters were studied, put forward reasonable disease treatment strategies and methods. Then according to the perforated steel pipe grouting, respectively discusses the horizontal perforated steel pipe grouting and vertical perforated steel pipe grouting design calculation, get perforated steel pipe grouting reinforcement design calculation formula. Through the entity test project, this research discusses the design and construction technology parameters of the treatment method from the theory and engineering practice.In this paper the finite difference divided into software FLAC3 D geological model is established with perforated steel pipe grouting model, the stress on the subgrade deformation and settlement deformation law analysis and research, calculation and analysis of horizontal perforated steel pipe grouting and vertical perforated steel pipe grouting deformation settlement characteristics and rule of stress and strain. The simulation results are basically the same as the actual observation data, and the accuracy of the simulation results is proved from the side.. At the same time through the process analysis of embankment construction of grouting layer, the displacement vector can obviously damage trend of embankment. The results show that steel floral tube grouting reinforcement embankment layer construction in the physical and mechanical properties are improved obviously, improves the bearing capacity of embankment, achieve the effect of treatment of roadbed diseases, ensure the safe operation of the highway.