Analysis On Deformation Of Reinforced Retaining Wall Based On Spline Finite Point Method

Combined with the bank comprehensive improvement project in Yudong segment of the Yangtze River,Using the new theoretical calculation method,namely spline finite point method,to analysis the deformation of the reinforced retaining wall.It analysis the various factors that affect the horizontal deformation of the reinforced retaining wall respectively such as the height of the reinforced retaining wall,the properties and distribution of the reinforced bar,the internal friction angle and the elastic modulus of the reinforced padding and the internal friction angle of rear fulling,and so on.The results have been compared with the finite element calculation results,and the calculation method of horizontal deformation of the reinforced retaining wall have also been discussed.Main research contents and conclusions are as follows:1.The reinforced retaining wall is simplified into elastic foundation plate model and cantilever beam model.Then the two simplified models have been calculated and analyzed theoretically with the spline finite point method.The result shows that the calculation results obtained by this method are similar to those calculated by finite element method.2.According to the influences of the reinforced padding and height of the reinforced retaining wall on the lateral deformation of the reinforced retaining wall,it can be seen that the internal friction angle and the elastic modulus of the reinforced padding have a great influence on the horizontal deformation of the wall,and increasing the internal friction angle and the elastic modulus can reduce the horizontal deformation of the wall.Similarly,increasing the internal friction angle of rear fulling will also reduces the horizontal deformation of the wall.Under the same conditions,the higher the height of the reinforced retaining wall,the greater the lateral deformation,so using a hierarchical retaining wall can effectively reduce the deformation of the retaining wall.3.The performance and distribution of the reinforced bar also have a great effect on the lateral deformation of the retaining wall.The calculated results are shown that,within a certain range,increasing the elastic modulus of the reinforced bar can reduce the horizontal deformation of the reinforced retaining wall effectively.The increase of the lateral length of the reinforced bar can also reduce the horizontal deformation of the wall,but when the length of the bar is excessive,its effect is obviously weakened.For the bar arrangement spacing,decreasing the spacing can also ease the horizontaldeformation of the wall,but when the spacing is too small the reinforced retaining wall will lead to super-tendon soil,which also weak its effect obviously.4.Analyzed the sensitivity of various influence factors of the lateral deformation of the reinforced retaining wall by using the grey relation method,it can be seen that the height of the reinforced retaining wall has the most significant effect on the horizontal deformation,and the rest are followed by the vertical arrangement spacing of reinforce bar,the internal friction angle of rear fulling,the internal friction angle and the elastic modulus of the reinforced padding,the lateral length of the bar and the elastic modulus of the reinforced bar.5.According to the result calculated by the spline finite point method,applying the multivariate analysis method to obtain the simplified formula for the horizontal deformation of the reinforced retaining wall.