Abstract

To explore a more reasonable earth pressure calculation theory, microstructure characteristics of soft clay in Hangzhou, Ningbo and Wenzhou had been observed using scanning electron microscope (SEM) and were quantitatively analysed using Image-Pro Plus (IPP) software. The relationship between porosity and contact area of soft clay was got by considering the microstructure. Combining soil lateral stress transfer principle, a calculation theory of earth pressure considering soil contact area was got. The possible reason of the differences between earth pressure and the actual monitoring earth pressure was analysis by the case.

Highlights

  • The calculation of earth pressure is one of the primary research topics of soil mechanics

  • Chen Yu-jiong [6] believed that, as far as the method of estimating water and earth pressures together manages to avoid the puzzle of the pore water pressure by seeing the water and soil as an integral using total stress strength parameters, there is no need to figure out the mechanical mechanism of the pore water pressure

  • In this formula, m is the value of thresholds and SA is the area of the pixels of selected regions, which is analyzed by Image-Pro Plus (IPP) software

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Summary

Introduction

The calculation of earth pressure is one of the primary research topics of soil mechanics. Anecdotal evidence suggests that the interaction between the soil and the supporting structures is much more difficult than what we have learnt, and the method to calculate the earth pressure on the back the soil retaining structures is still under discussion. As for these questions, the scholars domestic and abroad have carried out plenty of qualitative and quantitative research work on microstructure of fine particles based on microscope images in the past few decades [1,2,3,4,5]. On the basis of previous studies, the paper analyses soft clay microstructure and modifies the commonly used formula of earth pressure, followed by a calculation theory considering soil contact area

The micro porosity of the clay
The rate of the contact area of clay particles
The relationship between the contact area and porosity
Methods
Conclusions
Full Text
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