Analysis Of Compacting Effect Of Jacked Pile

As China's reform opening-up and continuous development of the urbanization process,Jacked pile with no vibration, low noise, less pollution, construction speed, quality, reliable and economic advantages, such as general builders to get the favor to promote the use of large scale.Jacked pile is soil compaction pile. Corresponding volume of soil would be spaced while piling. As the moment of soil incompressibility, Pile soil produces horizontal and vertical displacement. It would make the building wall crazing, painting shedding, road uplifting, underground facilities and pipelines destructing, and so on. While pile group construction, later pile would make the former pile tilt the balance, elevation, warp or even break. In addition, the soil around pile would be strong disturbed by driving pile. It also brings high excess pore water pressure, the effective stress of soil reduction, significant reduction in shear strength. Therefore, the study on the mechanism of soil compacting effect with static pressure pile is important.Elastic Stresses and displacements solution of classic cylindrical cavity expansion theory is firstly introduced. So do the stress solution of plastic phase of Tresca material. Moreover, the displacement solution of plastic phase is solved on this foundation. Excess pore water pressure numerical methods of cylindrical cavity expansion theory are analyzed. The driving process to mud clay and sand is separately simulated by Plaxis finite element software. The horizontal and vertical pile displacements, and pore water pressure distributions are analyzed at different distances and depths. The soil compaction effects of two kinds of soil are also compared and analyzed. Different diameter piles are simulated. The soil compaction effect of different pile diameter is compared and analyzed.The achievements are obtained as follows: The rules of the horizontal and vertical pile displacements, and pore water pressure distributions of the soil around piles, at static pile driving stage. Distribution rules of soil compaction effect, caused by pile driving to different soil. Distribution rules of soil compaction effect, caused by pile driving to different diameter piles.