基于ANFIS的全夯式扩底灌注桩极限承载力预测研究

全夯式扩底灌注桩作为一种新型的灌注桩工程技术,由于桩身全程采用夯击成型,桩底及扩大头呈

RESEARCH ON PREDICTION THE ULTIMATE BEARING CAPACITY OF CAST-IN-PLACE PILE WITH ALL EXPANDED DRIVE BASED ON ANFIS

The cast-in-place pile with all expanded drive (CIPPWAED) is a new kind of cast in-situ pile, because it is formed by all expanded drive during its construction process, the bottom and the lower extended cylinder part of the pile body shape likes sugar coated haws on a stick, or maize stick. The point resistance and the skin resistance of single pile is increasing obviously after the all expanded drive construction, based on national code, the calculation results of the skin resistance is not precise, further more, it can not disclose the mechanisms of the pile. In this paper, by collecting the main factors which affect the properties of bearing capacity, to analyze the extrusion soil effect and the secondary extrusion soil effect, based on the adaptive neuro-fuzzy inference system, with the measured materials of the static loading test in-situ (the time from 1995 to nowadays), to apply the fuzzy logic toolbox to build the ANFIS model, and to optimize the ANN with immune genetic method, and then study the ultimate bearing capacity of the pile with all expanded drive. The prediction results shows that it brings a new bright future for this predicting method because of the calculation mode of this kind pile overcome the shortcomings of the bearing capacity calculated by empirical formulation and FEM method.