Abstract
This paper presents a postconstruction settlement prediction method for pile-soil composite subgrade based on the multilevel fuzzy comprehensive evaluation principle. In this method, the variation range of postconstruction settlement can be obtained from a simple calculation based on the basic data of actual engineering. Firstly, according to the characteristics of influencing factors in the construction of soft soil subgrade, the evaluation index set and two-level factor index sets were selected. The grading standards of the evaluation index and factor index were determined according to the allowable value of the standard and the numerical simulation results. Secondly, each factor index was standardized, and the normal distribution function in the form of exponential was used to construct the standard membership function for the first and second factor indexes. Finally, the comprehensive evaluation matrix of postconstruction settlement of composite subgrade was constructed based on the entropy weight method. The variation range of postconstruction settlement was predicted by the principle of maximum membership. The example analysis shows that the predicted results of the prediction method and the field measurement method are in good agreement, indicating that the proposed method can realize the postconstruction settlement prediction of composite subgrade, and the results are more accurate and more instructive.
Highlights
Academic Editor: Hailing Kong is paper presents a postconstruction settlement prediction method for pile-soil composite subgrade based on the multilevel fuzzy comprehensive evaluation principle
According to the characteristics of influencing factors in the construction of soft soil subgrade, the evaluation index set and two-level factor index sets were selected. e grading standards of the evaluation index and factor index were determined according to the allowable value of the standard and the numerical simulation results
The comprehensive evaluation matrix of postconstruction settlement of composite subgrade was constructed based on the entropy weight method. e variation range of postconstruction settlement was predicted by the principle of maximum membership. e example analysis shows that the predicted results of the prediction method and the field measurement method are in good agreement, indicating that the proposed method can realize the postconstruction settlement prediction of composite subgrade, and the results are more accurate and more instructive
Summary
Soil properties and parameters related to the pile, such as pile spacing, pile length, and cap width. A calculation model for predicting the additional stresses in the composite foundation soil and the layerwise summation method. Pile-subgrade stiffness ratios for piled ree-dimensional finite-element (FE) e elastic settlement of piled foundations on nonhomogeneous media analysis foundations resting on rock. E calculated dynamic stresses combined with the cyclic strain roads on soft soil under cyclic accumulation model traffic loadings. The entropy weight method, standardized membership function, and two-level evaluation system are introduced. In this way, the calculation accuracy is improved and the index of influencing factors involved in the comprehensive evaluation in each level is reduced, which is more convenient for practical applications
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