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Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
Published on: October 16, 2018
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Cracking propagation in expansive soils under desiccation and stabilization planning using Bayesian inference and
Babak Jamhiri1, Yongfu Xu2, Fazal E Jalal1
1Department of Civil Engineering, State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Environmental Science and Pollution Research International
|January 22, 2022
Summary
Desiccation cracking in expansive soils is a major concern. The linear elastoplastic model offers the most reliable prediction for cracking depth, guiding effective soil stabilization strategies.
Area of Science:
- Geotechnical Engineering
- Soil Mechanics
- Civil Engineering
Background:
- Expansive soils are prone to desiccation cracking under cyclic moisture variations, compromising structural stability.
- Accurate prediction of cracking is crucial for effective soil stabilization and infrastructure longevity.
Purpose of the Study:
- To evaluate and compare prominent desiccation cracking prediction models for expansive soils.
- To assess model and parameter uncertainties and identify key governing soil properties.
- To develop and evaluate eco-friendly stabilization policies using probabilistic approaches.
Main Methods:
- Comparison of linear, linear elastic, linear elastoplastic, and linear elastic fracture models.
- Generation of Monte Carlo limit state functions and sensitivity analysis.
- Application of Bayesian inference and Monte Carlo Markov decision chains for policy evaluation.
Main Results:
- The linear elastoplastic model demonstrated the least uncertainty and provided reasonable cracking predictions.
- Matric suction and dry density were identified as the primary soil parameters influencing cracking.
- Stabilization policies promoting high moisture and dry density yielded the highest safety factors (SF=5.1), minimizing cracking risk.
Conclusions:
- The linear elastoplastic model is recommended for predicting desiccation cracking in expansive soils.
- Soil stabilization strategies should focus on managing matric suction and dry density.
- Probabilistic methods enhance decision-making for sustainable expansive soil management.
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