Research On Consolidation Of Soft Soil Foundation Based On Mole-Coulomb Model

Along with the fast development of our economic construction, the project construction in the soft weak soil develops rapidly. More and more projects are build in the soft ground,for example, the port, the road and the airport. While the problems of the stability and settlement for the soft weak groundwork become more and more obvious. How to ensure the stability of the groundwork and how to estimate the settlement accurately are the two major technical problems. It exists the big error if use the normal calculation for the settlement in the soft weak groundwork comparing with the actual testing value. This article is based on the contract the second part of the soft weak groundwork control for the road project of datan, Humen,Dongguancity,Guangdong province.Using the FLAC software to do the settlement estimated simulation of the soft weak ground work, based on the previous work, through the local testing, theoretic study, numerical value simulation ect ways, to do the mainly following aspects of works:1,To construct the mechanical model according to the geological situation and features of the Humen port, combining the geological itself physics speciality and the relationship between the originality and the construction.2,Introduce the general situation of the laboratorial area for the piling and carrying estimated pressure of an entering port section of the datan gangxi humen road, based on the local testing data, analyze roundly the develop rule of the soft soil groundwork in the aspect of vertical displacement settlement, run deep settlement, horizontal displacement, and the dissipation rule of the hole water pressure.3,Adopt the mole-coulomb model, use the FLAC software to do the weak groundwork piling and carrying estimated settlement numerical value simulation for the entering port section of the datan, gangxi, humen road. Found the better consistent situation between the software simulation calculation result and the local testing result, and validate the veracity and practicability of the model calculation.4,Using the grey theory GM(1,1) model to forecast the weak groundwork shallow settlement, and compare the estimated result with the result from the FLAC numerical value simulation. Although the grey theory is generally applied in the weak groundwork settlement forecast, while the longer of the estimated time, the bigger of the relative error, which indicates that the GM(1,1) model has the certain limited situation under the application of the settlement simulation forecast. However, the FLAC just remedy this disadvantage, and validate the applicability of the FLAC in the weak groundwork settlement forecast.