Application Research Of Yang River Delta Cement-soil Mixing Pile In Soft Foundation Processing

Cement-soil mixing pile is a kind of effective treatment of soft soil foundation technology,highway engineering and railway in the soft soil foundation treatment engineering. Soft soil foundation are widely distributed in our country, especially the Ring Yangze River delta sea area, the pearl river delta, Yangtze river delta region distribution of soft soil, the construction of the railway in the region, the first is to solve the foundation reinforcement, in this paper, the soft soil foundation treatment,Yangze River delta bay rim area of soil-cement mixing pile engineering application technology.In this paper, Combining with the engineering example, analysis of the Yangtze river delta region of geological features,Hangzhou railway embankment analysis was used to study soil-cement mixing piles in the area of application, this paper research content mainly has:First,this paper expounds the structural features and current situation of the development of screw pile composite foundation and the research of the status quo. Nail shape pile reinforcement mechanism, mechanism of load transfer,the applicable scope and damage forms.Secondly,the engineering characteristics of soil-cement mixing pile composite foundation is studied. Mainly from three aspects, one is to analyze the characteristics of the soil, the characteristics of composite foundation and application scope, the technology of soil-cement mixing pile composite foundation. Second, the reinforcement mechanism of cement-soil mixing pile composite foundation and the principle of load transfer are studied. Three is the study of damage characteristics of cement-soil mixing pile.Third, the design parameters of soil-cement mixing piles is studied. Design principle, design parameters, design process and design steps, etc. And then gives the soil-cement mixing pile composite foundation bearing capacity determination method and calculation formula. Finally elaborated the soil-cement mixing pile composite foundation settlement calculation theory and calculation method of deformation.Fourth, is located in Hangzhou railway HCZJ- 6 pieces of long, study the characteristics of soil-cement mixing pile composite foundation. According to the Yangtze river delta area engineering geology, soil mixing pile composite foundation settlement of embankment load calculation, through comparative method, respectively, of soil-cement mixing pile construction efficiency analysis.