Prediction Method of Clay Consolidation Coefficient Based on Microstructural Parameters

Abstract

The invention provides a microstructure parameter-based clay consolidation coefficient prediction method, which comprises the steps of: conducting clay consolidation experiments under different pressures, and measuring the void ratio according to conventional geotechnical experiments; calculating the consolidation coefficients of different consolidation experiments; employing a scanning electron microscope technique to obtain a microstructure photo of a corresponding sample section; carrying out granule area and void area segmentation on the clay microstructure photo, and extracting the information of granule unit sum, unit direction, total area, total circumference, and area ratio; analyzing the granules and establishing a main component expression with an accumulative contribution rate of over 95%; and establishing the relationship between the main components and the clay consolidation coefficient. The method provided in the invention links the consolidation coefficient of clay with its microstructure parameters to obtain corresponding consolidation coefficient indexes under different pressures according to the clay void ratio and micro-parameter main components. The method can effectively shorten the experiment time at a civil engineering investigation phase.

Description

technical field [0001] The invention belongs to the field of rock and soil microstructure research in the discipline of civil engineering, and in particular relates to a method for predicting clay consolidation coefficient based on microstructure parameters. Background technique [0002] The consolidation of clay is one of the basic subjects of soil mechanics, and it is the basis for foundation settlement prediction, building life assessment, foundation foundation and structure reinforcement and reinforcement. [0003] With the development of economy and society, the settlement, settlement difference and settlement development of various infrastructure projects located on clay or soft clay foundations, such as highways, railways, water conservancy, industrial and civil buildings, etc. have become more and more stringent. requirements. For example, new factories such as high-speed railways, highways, rockets and aircrafts have put forward higher and higher requirements for t...

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Problems solved by technology

At present, the research results on the theory of soil consolidation and compression have been relatively rich, but there are still many problems, mainly including: (1) In the process of clay consolidation, the microstructure of soil (particles and pores) The reconstruction process and laws are very complicated, and there is no proper method to characterize and describe this process; (2) Although some quantitative relationships between the clay consolidation characteristics and its microstructure parameters have been established, they all remain in the The description of individual microstructure parameters, and the methods and ideas for describing the microstructure reconstruction process from the overall level have not been given; (3) Due to the complexity of the soil, its macroscopic consolidation characteristics have obvious individuality and regionality. It is difficult to reflect the relationship between the consolidation characteristics of different clays and their microstructure.

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