New Calculation Method of Shallow In-Situ Solidification Technology Combined with Pile-Soil Rigid Composite Foundation

Abstract:

Considering the shortcomings of settlement calculation research on shallow in-situ solidification combined with pile-soil rigid composite foundation， and the limitation of settlement calculation method in current specifications under similar working conditions， this paper analyzes the settlement mechanism of shallow in-situ solidification combined with pile-soil rigid composite foundation， studies the sharing proportion of pile end stress under the soil arching effect，analyzes the settlement influence of the additional stress in the negative friction area above the equal settlement surface， and proposes a novel settlement calculation method for the shallow in-situ solidification combined with pile-soil rigid composite foundation. The numerical simulation and engineering practice， indicate that the shallow in-situ solidified soil technology can strengthen the soil arching effect， enhance the pile foundation transfer effect， and effectively reduce the overall settlement of the composite foundation. The settlement calculation method proposed in this paper is accurate and reliable.

Key words:in-situ solidification;pile-soil composite foundation;settlement calculation;soil arching effect;equal-settlement level of piles