Research On The Influence Of Silt Working With Cement Flyash Gravel Pile Compositefoudation, Performance

CFG pile can effectively handle can't meet the requirements of deformation and bearing capacity of natural foundation, especially in view of the natural foundation is given priority to with silt, treatment effect is particularly evident. This kind of processing technology to use industrial waste fly ash, green and economical. In order to explore the characteristics of stressed deformation of CFG pile composite foundation, the mechanism, influencing factors and discusses the construction quality control and perfect related is very necessary, can be CFG pile composite foundation for the future provide certain reference of engineering practice.In this paper, combining with engineering example, the silt CFG pile composite foundation theory analyzes the stress deformation characteristics; The authors made an evaluation of the natural foundation and composite foundation; On the behavior of pile has carried on the field test and analysis; Using the finite element analysis of the influence of mattress layer on the composite foundation; Finite element simulation of the interaction of piles and soil, and its influence factors are analyzed; Of composite foundation construction and the construction of the environmental problems are discussed in this paper, and proposed the corresponding countermeasures. Through a comprehensive systematic study of CFG pile composite foundation, obtained some research results of reference value to engineering.(1)It has a great influence on the foundation of CFG pile body traits, its construction and completion of a period of time, will be the strength of soil between piles, pile soil moisture content between a larger impact.(2) The influence respectively to person who mix of fly ash CFG pile of compressive strength, especially for pile devices for ages paragraph effect is bigger.(3) The upper load size, pile spacing, pile length, all can affect stress deformation characteristics of composite foundation.(4)The mattress layer of pile soil has great influence on the load ratio, the modulus and thickness will impact on composite foundation load-bearing characteristics.(5) The CFG pile body, the mattress layer construction and quality control is very important to construction quality should be strictly controlled. CFG pile construction influence to the environment, take reasonable measures to reduce the influence degree.