Bearing Capacity Of Vertically Loading Single Pile About Lanxi Electric Factory

To resolve bearing capacity is the key problem in the pile foundation design system. But the sedimentation property is the important index to confirm the bearing capacity, primary theory analysis methods of single pile are: load transfer approach, elastic theory method, shearing deformation transfer approach, numerical analysis method and other experiential simplified methods i.e. The theory analysis is not intuitionistic and exact than in-situ test, but it is superior to in-situ test in economic, quick, predictable, quantified. To load transfer approach,it is analysised and confirmde the load transfer function through pile load test profile and through the function to get load-sedimentation curve, so to analysis the engineering properties of the pile.The paper combine our country engineering practice recently and the criterion rules now, beginning from the classic static load instance in lanxi city of zhejiang province, after deeply analysis the load transfer process ,transformation disciplinarian and load-sedimentation properties of the single pile on the vertical load, by the deferent stress-strain relationship presented by the deferent soil strata, applied modified load transfer model of the side friction resistance and sedimentation displacement. Using modified model to calculate the corresponding pile top load quantity when it is in the elastic, elastic-plastic or plastic situation, derive a series formula between the pile top sedimentation and the bearing capacity, using it to simulate the interaction between the pile and soil, thereby to realize the dream to control the pile load bearing by the pile top sedimentation quantity.Through the theory of the work, the soil average physical mechanic properties is only needed to construct practical load transfer function, further to estimate the Q-S curve of single pile. when the static load test profile in certain place ,using this method to know the sedimentation properties of the pile foundation; or while pro-estimate the limited bearing capacity and load grade before the static test ,it may provide effective help and practice value is better.