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Estimation of Settlement of Pile Group in Clay Using Soft Computing Techniques

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Abstract

The present research introduces an optimum performance soft computing model by comparing deep (multi-layer perceptron neural network, support vector machine, least square support vector machine, support vector regression, Takagi Sugeno fuzzy model, radial basis function neural network, and feed-forward neural network) and hybrid (relevance vector machine) learning models for estimating the pile group settlement. Six kernel functions have been used to develop the RVM model. For the first time, the single (mentioned by SRVM) and dual (mentioned by DRVM) kernel function-based RVM models have been employed for the reliability analysis of settlement of pile group in clay, optimized by genetic and particle swarm optimization algorithms. For that purpose, a database has been collected from the published article. Sixteen performance metrics have been implemented to record the model's performance. Based on the performance comparison and score analysis, models MS3, MS9, MS17, MS23, and MS25 have been recognized as the better-performing models. Furthermore, the regression error characteristics curve, Uncertainty analysis, cross-validation (k-fold = 10), and Anderson–Darling test reveal that model MS23 is the best architectural model in reliability analysis of pile group settlement. The comparison of model MS23 with published models shows that model MS23 has outperformed with a performance index of 1.9997, a20-index of 100, an agreement index of 0.9971, and a scatter index of 0.0013. The compression index, void ratio, and density influence the pile group settlement prediction. Also, the problematic multicollinearity level (variance inflation for > 10) significantly affects the performance and accuracy of the deep learning model.

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Data Availability

All data, models, and code generated or used during the study appear in the submitted article. The database used in this research was collected from the literature.

Abbreviations

3D:

Three-dimensional

a20:

A20-index

ACP:

Axial capacity for driving piles

ANFIS:

Adaptive neuro-fuzzy inference system

ANN:

Artificial neural network

ANOVA:

Analysis of variance

BCP:

Bearing capacity of pile

BF:

Bias factor

BPNN:

Back propagation neural network

CAM:

Cosine amplitude method

Cc:

Compression index

CPT:

Cone penetration test

D:

Footing depth

df:

Degree of freedom

DRVM:

Dual Kernel function-based RVM

e:

Void ratio

ED:

Embedment depth

F:

F State value

F crit:

F critical value

FAP:

Footing net applied pressure

FE:

Finite element

FEM:

Finite element method

FFNN:

Fee-forward neural network

FN:

Functional network

FOS:

Factor of safety

ɣ:

Soil density

GA:

Genetic algorithm

GMDH:

Group method of data handling

GP:

Genetic programming

GPR:

Gaussian process regression

H0:

Null hypothesis

HR:

Research hypothesis

IOA:

Index of agreement

IOS:

Index of scatter

L:

Footing width

L/W:

Length-to-width ratio of footings

LB:

Lower bound

LL:

Lower level

LLP:

Laterally loaded piles

LMI:

Legate and McCabe's index

Lp/D:

Total length of pile/pile diameter

Ls/Lt:

Length of pile in the soil layer/length of pile in the rock layer

Ls-SVM:

Least square support vector machine

MAE:

Mean absolute error

MAPE:

Mean absolute percentage error

MBE:

Mean bias error

ME:

Margin of error

MOE:

Mean of error

MS:

Model structure

MS:

Mean of squares

NMBE:

Normalized mean bias error

NS:

Nash–Sutcliffe efficiency

ɸ:

Angle of internal friction

Pcyc:

Half amplitude of the cyclic load

PDR:

Pile driving records

PI:

Performance index

PLC:

Pile load capacity

PLT:

In-situ pile load test

PLTC:

Pile load test using a calibration chamber

Pm:

Mean value of cyclic load

PSO:

Particle swarm optimization algorithm

Pu:

Ultimate bearing capacity of pile

R:

Coefficient of correlation

R2 :

Coefficient of determination

RBFNN:

Radial basis function neural network

RMSE:

Root mean square error

RNN:

Recurrent neural network

ROC:

Receiver operating characteristics

RSR:

Root mean square error to observation's standard deviation ratio

RVM:

Relevance vector machine

SA:

Actual settlement

SE:

Standard error

SPM:

Supplementary materials

SPT:

Standard penetration test

SRVM:

Single Kernel function-based RVM

SS:

Sum of square

StDev:

Standard deviation

SVM:

Support vector machine

SVR:

Support vector regression

TSFL:

Takagi–Sugeno fuzzy method

UB:

Upper bound

UBC:

Ultimate bearing capacity

UCS:

Unconfined compressive strength

UL:

Upper level

VAF:

Variance accounted for

VIF:

Variance inflation factor

W:

Footing length

WBC:

Width of confidence bound

WMAPE:

Weighted mean absolute percentage error

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Funding

No funding was received in assisting the preparation of this manuscript.

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Authors and Affiliations

Authors

Contributions

JK: Main author, conceptualization, literature review, manuscript preparation, application of AI models, relevance vector machine model development, methodological development, statistical analysis, detailing, and overall analysis; HS: literature review, manuscript preparation, introduction and literature writing, theory of adopted methods, soft computing model development, detailing, overall analysis; KSG: conceptualization, comprehensive analysis, manuscript finalization, detailed review, and editing.

Corresponding author

Correspondence to Jitendra Khatti.

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Khatti, J., Samadi, H. & Grover, K.S. Estimation of Settlement of Pile Group in Clay Using Soft Computing Techniques. Geotech Geol Eng 42, 1729–1760 (2024). https://doi.org/10.1007/s10706-023-02643-x

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  • DOI: https://doi.org/10.1007/s10706-023-02643-x

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