Investigation On Double-Row Anti-Sliding Piles

Double-row anti-sliding piles have been widely applied to civil engineering practice. But up till now, models and methods which are used for calculations in many design and research institute are different from one another,and lead to difficulty in reasonable desingning. The key problem is the allocation of the pushing force of the creeping-hillside between the double-row piles. The main purpose of this thesis is to find the allocation relationship between the front pile and the back pile through research of the action of soil between the double piles and by means of the construction of calculation models, so as to provide references for designing and construction.In the thesis , the achievements concerning interaction of portal double-row piles and soil are analyzed and summarized in the first place .To find out the transmission and allocation relationship of the pushing force of the creeping-hillside between the portal double-row piles, this thesis applies the elastic theory and structural analysis theory to get the calculation formulas of the horizontal displacement of the piles and the soil between the piles, and applies deform co-ordination theory to get the analytic answer to the model. The calculations show that the ratio of the interacting force between the back pile and the soil to the force between the front pile and the soil decreases while the row distance between the piles increases and that the main research results and conclusions provide references for designing and construction. The calculations also show that the linked beam transmits some pushing force of the creeping-hillside,and that with the increase of the rigidity of the linked beam, the displacement and turning decrease rapidly while the ratio changes within a small range. After all, an example of anti-sliding piles design is given through the comparison of anti-sliding piles design of the ChangJiang gorges WanQuan creeping-hillside, the result shows that the double-row piles aremore economical than the sole piles when the the pushing force is very big.