Application Of Lateral Foundation Coefficient Test Of An Anti-slide Pile Technology

China is one of the world's countries suffer the worst landslide disaster.Among the slope control measures,due to its unique characteristics,the anti-slide pile has become one kind of very popular measure Slope Landslide all over the world.So reasonable and meticulous design of anti-slide pile are the basic requirements of successful engineering and cost savings,a main factor of reasonable and fine design is the selection of lateral foundation coefficient of anti slide pile.So far,the selction of foudation coefficient is mostly based on old norms or experience,It exists big deviation,subjectivity and other issues.So in this paper,borehole dilatometer is used to test anti-slide pile foundation coefficient,discuss the distribution of foundation coefficient.The main study results are as following:(1)The test value of foundation coefficient is greatly affected by the development of rock joints and fractures.If the joint development is obvious and the rock is broken,the modulus value is very low.In the contrary,if the weathering of rock is not obvious,and the degree of unloading is small,the test value will be relatively large.(2)The factor of foundation coefficient test is divided into many factors,for example:The influence of depth,the influence of rock structure,the influence of rock type,the influence of In-situ stress,the influence of geological structure,the influence of drilling quality,the influence of test environment,and the influence of equipment,artificial deviation and so on.(3)Through the test results of the elastic modulus and the MIDAS numerical simulation results,we can obtain shear force,bending moment and force distribution of the pile and use the basic theory of the foundation coefficient to solve the foundation coefficient and the proportion coefficient in the ground.By continuously adjusting the parameters,we can obtain the theoretical formula of the elastic modulus-foundation coefficient.(4)The relationship formula of elastic modulus and foundation coefficient of rock is obtained by means of borehole elastic modulus test and correlation data and a test method of lateral foundation coefficient of anti slide pile is proposed.(5)Mainly based on the test results of the field borehole elastic modulus,the foundation coefficient suggestion table in Gutian County,Ningde City is proposed,which can provide information for related projects.By experiments,we can draw that the technique is feasible to test foundation coefficient by using the drilling equipment.The technique has been proved to have practical engineering significance.(6)Existing problems and potential tendency.It is found that the elastic modulus of the soil layer can not be tested by the borehole elastic modulus equipment.In view of this,it can be obtained by combining the field investigation,laboratory reports,etc.In this paper,the relationship formula of elastic modulus and foundation coefficient is in the preliminary stage.The practical applicability of this research should be done a lot of further analysis,and strive to expand the application range.