Theoretical Analysis Research On The Effect Of Jet In The Soft Soil Layer

With the acceleration of modernization and the expansion of the scale of the city,the demand for foundation reinforcement technology is increaseing dramatically.For nearly forty years,various types of new jet grouting construction methods continue to emerge,laying the foundation for the infrastructure and construction industry.With the increase of China's machinery manufacturing and mechanical design level,and the degree of development of international integration fast,the main construction machinery jet grouting needs such as grouting pump,drilling rig,and their stability and work ability are improved significantly.However,in company with scale-upof the engineering construction,it has become an important aspect of the study on how to obtain a higher bearing capacity of the foundation,a larger diameter of the jet grouting pile and a higher pile body strength.In this paper,the pressure and velocity distribution of the jet flow field of wate jet and the cement slurry jet with different water cement ratio is studied,using the straight cone nozzle as the research object.With the aid of the Fluent software,which has been researched widely and thoroughly in the computational fluid dynamics(CFD)field,we can do numerical simulation.It can give us not only the calculation results,but also visualization results,more intuitive performance trends,distribution,such as using different color to distinguish images,with the arrow vector and can display the variation of line graph.Through the simulation analysis of the straight cone nozzle under certain injection pressure with different parameters of the water injection and cement slurry injection with different water cement ratio,obtain certain rules and the optimal injection parameters.