Soil-Arch Effection Located Behind Pile Is Researched And Applied In The Supporting Structure Of The Anti-Sliding Pile

Now, most of anti-sliding piles designation and computation are based on the sole anti-sliding pile's stress, regardless of the obstruction from soil-arch effect。And the design method focused on the safety, it's wasteful more materrial。There are some reason, but the most contribution is that the theory of the mechanism of anti-sliding piles actions on soil-arch effect is not clear。So, this article researched deeply about the mechanism of anti-sliding piles actions on soil-arch effect, the impact factors of soil-arch effect and so on。The main content in this article:(1) Analysed the slide stability of the Red Tea, brought forward a designproject。(2) Analysed and discussed two-dimensional numerical modeling of soil-arch effects, analysed the impaction degrees of different piles' sections, discussed the different spaces between piles and different lands factors on effects of anti-sliding piles。(3) Combined with the analysis of anti-sliding pile and the facts of Red Tea Building, designed the three-dimensional numerical modeling of simulation the Red Tea Building slope by adding anti-sliding pile, analysed the interaction of anti-sliding pile with the surrounding rocks by three-dimensional numerical modeling, analysed the characters of anti-sliding pile and surrounding rocks, deformation trend of anti-sliding pile and surrounding rocks and stress trend,the effects of pile groups on the soil-arch。The results showed that: the main influence factors are the sustentation effect of anti-sliding piles and the earth-arch effect。The earth-arch effect's behaviors will be affected by the different sliding depth and thrust。High cohesion sliding body will increases anti-sliding piles' reinforcement。the increased extent will decline When the cohesion exceeds 20kPa。increases anti-sliding piles' reinforcement will be increased by Large angle of internal friction sliding body。But When the angle exceeds 30, the increased extent will decline。The increase of pile spacing will increase the largest displacement and the relative displacement between the pile and earth, arise excess soil that between piles being extruded and make the anti-sliding piles invalid when the extent exceeds the requirement。(4) Designed the construction of anti-sliding pile and the way of anti-sliding according to the results of three-dimensional numerical modeling, then monitored the effects of the anti-sliding way,finally, we can get the characters of the distoration about the anti-sliding pile and the general trends of the slope deformation。(5) Compared with datas which is our expected, three-dimensional numerical modeling and the monitored results, the feasibility of design anti-sliding pile is proved taking into account the results of three-dimensional numerical modeling of soil-arch effect。...