| With the development of construction and the fast growth of the building covers, the land resources are more and more nervous. The construction of ground treatment of building with research and application of the one hand, building the foundation so that greater carrying capacity limits use of,on the other hand save a lot of building materials resources,investment projects has also been reduced accordingly.At present, the ground treatment technology in the composite foundation of the extent of people with far more than its theoretical research level. For different regions, specific natural geological environment. Housing construction in order to ensure the quality of ground treatment works, to protect life safety, reduce investment projects and reduce construction materials effectively , must be integrated with the specific context of the regional geological and engineering geological conditions in the composite foundation of a feasibility study.Deep Mixing Pile is a new technique of reinforcing foundation which has a lot of advantages. With the construction of numerous foundation projects, application of Deep Mixing Pile is more extensive. This paper Combined Songyuan City, Jilin Province, Xinyu real estate limited liability company's six-storey residential building harmony court works. In the background and understanding of regional geological venue construction projects on the basis of geological conditions. In soil-cement composite foundation (pile cylinder) load test at the scene and indoor soil-cement ratio and its physical and mechanical tests, the paper sums up select methods and correlations of various physical and mechanical index of soil-and-cement. Then Deep Mixing Pile composite foundation theory to base a more systematic study. Through comprehensive data analysis, This study concluded venues Deep Mixing Pile should pay attention to the problem, Based on the staic loading test data of single pile from the practical project, the shape characteristics of single Q-s curves that were not loaded to failure state have been studied and they are concluded to several types.According to the different failure modes of the rapidly turning curve and the gradually varying curve, appropriate determining methods of bearing capacity are studied. Research shows that by changing cushion the modulus and the thickness can be a good conditioning the soil pile load distribution, namely, the regulation of soil-pile stress ration, the pile-soil bearing capacity can play simultaneously, so as to achieve the purpose of optimizing th design. To optimize the design of the composite foundation has conducted in-depth analysis, revise and improve the existing formula does not match with the actual conditions, The establishment of a natural geological conditions suitable for the local Deep Mixing Pile bearing capacity of composite foundation formula. Housing construction work on the study area for Deep Mixing Pile composite foundation strengthening the mechanism of the theoretical and experimental studies have a certain value. |
