Vacuum Well-point Dewatering Field Experiment And Theoretical Analysis On Silty Ground

The construction method of vacuum well-point dewatering is suitable for the environment of high groundwater table level, which is an important technical measures for the earthworks, construction of foundation engineering. It is also able to reduce underground water level effectively and reduce the water ratio of soil in foundation to improve the physical-mechanical properties of soil and increase soil bearing capacity and foundation strength while reducing the lateral displacement and settlement of soil. Vacuum well-point dewatering technology is more advanced and reliable in the deep foundation of dewatering and sealing technology. However, the study on theory of vacuum well-point dewatering technology is much less than engineering and its design is mainly based on engineering practice. With the subsequent application in practice and the improvement of theoretical research vacuum well-point dewatering technology will play a greater role in the project.Based on the silt foundation of vacuum well-point dewatering in East Industrial Park of Urumqi City, Xinjiang Province this paper studies the foundation under the action of groundwater in the permeability of vacuum and studies a single well water table, water production, the scope of their relationship over time under different depth of well points and different vacuum. In this paper discuss the silt foundation of groundwater level change, a change of water and its relationship with time under the conditions of a single row of well in different depths. By reading relevant literature and on the field and laboratory test data analysis it is conclude that the changes of vacuum influence relevant variables and parameters of dewatering. Finally, in this paper the typical formula usually used in dewatering is supplied and improved, and the effect of vacuum well-point dewatering and precautions are discussed.