Research And Application On Laboratory Model Experiments Of Dynamic Compaction Method

With the continuous development and progress of economic and society,people's living standard is increasing day by day,and industrialization and urbanization also constantly deepen which provides unprecedented development opportunity for infrastructure in the loess areas such as railways,highways,airports and new town,etc.But in recent years,there is a nevous situation with the continuous development and advance of infrastructure in the loess area.In order to protect agricultural land and advoid large area fertile land being occupied,many infrastructure projects are selected in the mountainous area of complex geological conditions.As we all know,the project construction in loess areas almostly were faced with many' engineering problems such as lacking of foundation bearing capacity,settlement deformation larger,the loess collapsibility and vibration,but the dynamic compaction method has many unique advantages which is widely used in many infrastructure project construction in loess area.Dynamic compaction method is an economic and effective foundation treatment method,also a kind of active reinforcement method.Dynamic compaction method brings huge economic benefits,but also a lot of environmental problems,such as noise pollution and the surrounding buildings destroyed,etc.Therefore,in order to make the dynamic compaction method produce economic benefits and social benefits maximization,it is necessary to reaserch and analyze for the dynamic compaction method.The article embarks from laboratory model experiments and engineering example of dynamic compaction method,the main contents are as follows:Firstly,I starts accumulation and click crater depth from dynamic compaction method through the laboratory model experiments,analyzing changes in relationships them with the changing factors such as dynamic compaction times,energy level,compactness and moisture content.At last,I regard putting forward to 90%-95%of the total crater depth as optimal number of dynamic compaction,provide a reference for concrete engineering construction dynamic optimization.Secondly,I got the attenuation law of them on the basis of the analyzing data of dynamical soil pressure and acceleration through the laboratory model experiments.At the same time,dynamic compaction vibration safety distance is proposed with a certain specific vibration acceleration as boundaries.In addition,also probes into change relationship between the vibration amplitude and vibration frequency with dynamic compaction energy level,soil depth and horizontal distance.Lastly,Soil vibration is analyzed under different combinations of on the same energy level and different rammer diameter,and obtained the change law of the dynamical soil pressure and acceleration,which can provide certain reference for dynamic compaction parameters optimization.