A Settlement-Compensation Method For Analysing The Behaviour Of Settlement Controlled Piled Rafts

At the present time, pile—raft with large space is using more and more. But the state of piled raft under loads is very complex, especially the settlement prediction is more difficult. The already exiting methods are not suitable, so the engineer need a practical and simple method urgently.Countering the condition of above, this text addressed the settlement compensate based method. The main principle of this method is using the capacity sufficiently of soil under the raft. After drawing the p—s curve, we can get the corresponding load to the designed steelement. Then the load which needs to be undertaken by pile and the number of pile can be got either. So the next setp is pile arrangement and calculation. In order to be calculated by computer, this text established the compile procedure of FORTRAN. And it can do almost at every engineering conditions simply and quickly.In order to explain this method further , this text use a simple instance for primary calculation, and analysis the main influencing factor as the using coefficient of pile, the distance of piles, the longth of piles and so on. At last, this test used the large general purpose software ABAQUS, built the finite element model, computeted the single pile and the pile—raft separately. Through the comparison of two computed results, we found that they are very approximated, and it declaraed that this method is correct and applicable. At the same time, this text choosed an engineer example which is the typical one using the settlement controlled method. Using many methods to compared with the measured data, we can find that the method of this text is suitable and it can offer instruction to the engineering.