Influence of Rock-socketed Depth and Reinforcement Range on Performance of Pile Foundation Joist Structure in Deep Soft Soil
Taking a newly-built railway project as an example,based on finite element software,the depth of cast-in-place bored pile embedded in bedrock(5 pieces of depth data)and the size of reinforcement range by rotary jet grouting pile in the front(6 pieces of row numbers for reinforcement)were taken as the control variables to study the mechanical properties of the pile foundation and the settlement of the subgrade surface.The results show that,the maximum horizontal stress of the cast-in-place pile foundation appears near the soil-rock interface,and increasing the rock-socketed depth of pile foundation and the row number of jet grouting pile in the front can effectively reduce the horizontal deformation of the pile foundation and the settlement of the subgrade surface.When the rock-socketed depth of the pile foundation is 1D(D is the diameter of cast-in-place pile)or the row number of jet grouting pile in the front is 3,the change rate appears an inflection point from fast to slow.The pile foundation length is 16 m and the jet grouting pile in the front is 3 rows,which has good economy.
deep soft soilpile foundation joist structurerock-socketed depthdisplacement monitoringsubgrade settlementeconomy
万方数据
维普
