The Selection And Application Of Miscellaneous Fill Treatment Programs

With the expansion of city size and population, land becomes scarcer. More and more projects construct in the miscellaneous fill. Treatment of miscellaneous filled foundation has been a difficult problem. Optimization processing program selection is the core of miscellaneous filled foundation treatment. The selection and application of miscellaneous fill treatment programs has important social and economic benefits.Firstly, the thesis describes the engineering properties of miscellaneous fill, engineering properties of influencing factors and so on. And it conscientiously sums up miscellaneous fill common ground treatment methods, reinforcement mechanism and applicable scope.Then, the thesis discusses the selection principle of foundation treatment scheme, selection of procedures, the influence factors of scheme selection etc. The thesis inductive constructed a miscellaneous fill treatment scheme selection decision model with the analysis and comparison. At present, there are three categories the of the common method of foundation treatment scheme selection: qualitative comparison, quantitative calculation method and system analysis.The thesis establish analytic hierarchy process model and optimizes the key factors of miscellaneous fill treatment method (such as cost, time limit, safety, environment effects, quality, etc) by using AHP. The thesis reasonable analysis the applicability of foundation treatment method, and optimal foundation treatment scheme.Then, the authors preliminary studies miscellaneous fill treatment in Beijing area ,combining with his experience on miscellaneous fill for treatment. And the thesis details the drilling ram-expanded lime soil pile technology with the example of Hepingmen house district.Drilling ram-expanded lime soil pile appeared as a new type of composite foundation processing technology in recent years. This technology, no matter for soft soil foundation or hard soil foundation, is able to improve the foudation and make the bearing capacity further improved. Drilling ram-expanded lime soil pile method and equipment is simple and easy to be controled. The technology can reduce engineering cost, improve environment protection and energy saving. It is a safe , reliable, economic foundation treatment technology.Finally, basing on introduction of strengthening mechanism, design theory and engineering practice of drilling ram-expanded lime soil pile method, this thesis intends to provide the foundation treatment scheme experience for future similar projects.