The Improved Load Transfer Analysis Capacity And Settlement Of Super Long Pile

The super long compresol pile has been widely used in soft ground construction in the coast and along the coastal areas, But the long pile foundation in such an environment the deformation characteristics of theoretical research has lagged behind its engineering application In recent years scholars around the super long pile in loaded state launch a lot of research, and the study achieved a lot. Due to force clear, simple, load transfer method is widely used, but the load transfer method does not take into account the joint continuity of soil, there are some flaws in theory, so make use of the improved load transfer method.For further study and understanding the force and deformation characteristics of super long piles in soft soil environment, so proposes the improved method of load transfer. First, consider the hyperbolic model as a load transfer model, and make concept of pile-soil relative displacement and the pile displacement clear. Second, collect domesticd and foreign piles test data to analysis, and research the super long pile current situation and problems. The author collect complete four pile testing data in the site of Wenzhou World Trade Center, analysis and figure out the various sections of the test pile compression and the settlement amount and other relevant data. Finally, use the Matlab software write the improved load transfer method program to calculate and compare the calculation results and real results, drew the following conclusions:1.Pile displacement and pile-soil relative displacement is same meaning in nature.2.Hyperbola experience through the measured side friction of piles and pile displacement function obtained can be artificially specify more accurate approximation of the function curve for this stage is more practical engineering significance.3. Long pile under low load, the stress state performance characteristics of friction piles, with the load increased, the force gradually pile end bearing pile to show traits.4. Long sediment pile pile to play a greater impact on their capacity. Relatively thick sediment pile, the pile to penetrate the force destroyed the performance of damage type.5. Long low-load bearing piles, pile mainly elastic deformation mainly to withstand high loads, the experience of a larger pile of plastic deformation.6. Long pile under high load the pile will increase the relative displacement, the pile side friction to soften, so has the length of the effect of carrying capacity.