| Under the horizontal load in engineering, high-pressure rotary jet grouting pile is often emerged as"#" or "工" types, they other piles overlapping patterns, with no connection between piles" decentralized" processing slope to under lateral load patterns, is rarely seen at home and abroad. In a distributed pile reinforcing slope stability calculation of composite foundation, the shear strength index is calculated and the study of slope stability is one of the most key indicator, in treatment of slope of Chang Zhou water conservancy project of high-pressure rotary jet grouting pile as the engineering background, the main research of dispersion type high pressure jet grouting pile composite foundation shear strength.In general engineering shear strength index is through laboratory experiments or in situ experiments to obtain, but indoor experiments or in situ experiments have respective shortcomings, and because the actual engineering conditions and experimental conditions, not to each layer of soil pile composite foundation site or shear strength experiment, this experiment from field sampling, preparation of indoor cement soil were three axis, direct shear experiment, obtained by cement soil indoor physical and mechanical parameters, and then establish the simulation of the pile soil model, simulation is performed on a variety of soils of the single pile push shear test and single pile of composite piles composite foundation, composite, push shear test based on the experimental results, the calculation analysis shows that:1, given in the pile diameter and pitch conditions, each layer soil composite shear strength to meet the design requirements;2、through the single pile composite shear strength, multi pile composite shear strength obtained in a given diameter of pile spacing conditions composite foundation under horizontal space effect is not obvious, so we can say that in the slope stability calculation methods of two-dimensional calculation model the result is some reliable. |
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