Research And Aplication Of Cement-soil Mixing Pile Compostite Foundation

However, the history of Cement mixing piles reinforcement technique is only about tens years from invented to now.Not only mechanism of reinforcement but also design,computing methods have some faultiness.Some are still in the state of discussion research. We must deal with the crude soft soil artificially in order to meet the demand of groundsill intension,distortion and anti-seismic etc.Composite foundation with cement mixing piles is widely used in varies projects because of it's remarkable economical benefits and constructing convenience-shortly without circumstance pollution.As a kind of method to treat the soft soil foundation,MIP has many advantages such as constructing expediently,expenses cheaply,reinforcing soft soil to big thickness,and it is widespread used in our country;It has obtained better economic and social benefits.But on account of that studies of it's reinforcing theory and breaking theory etc.are still not perfcet,and applications in aetual projects also appeared some problems.For sacfty and economies of projects,and considering of complexity of engineering geology condition,important project usually confimrs feasibility of MIP composite foundation by indoor and in-situ experiment, and provides gist for design, construction, examination and inspection.On the base of achievements on cement-soil pile,a further study is conducted on the mechanism of cement-soil pile treated soft clay foundation,the characteristic of load transfer and the deformation is also explored. After detailed analysic and comparison,it points out the differences between load transfer behavior of grouped piles and that of singled pile.It also analyzes the characteristics of pile-soil's stress in soil-cement mixing pilecomposite foundation.By calculation,it concludes that the settlement rules of soil-cement mixing pile composite are influenced by the change of pile's length,displacement and pile's strength.It puts forward the detailed design procedure of soil-cement mixing pile composite foundation and analyzes the settlement calculation methods,As a result,a useful and simple method of settlement calculation for cement mixing pile composite foundation is suggested,which provides references for the design of soil-cement pile composite foundation.Finally, its practical application is proved by taking an engineering project as an example.