Technique and method for geotechnical engineering investigation and sampling based on soil variability

Abstract

The invention provides a technique and a method for geotechnical engineering investigation and sampling based on soil variability, which is characterized in that the technique and the method are implemented by establishing quantized soil variability databases and calculating vertical correlation distance, horizontal correlation distance and variability coefficients of soil; main implementation steps are as follows: (1) establishing a quantifiable soil variability database based on investigation and sampling data of neighboring regions, including the species, thickness and standard penetration test SPT-N values of soil layers; (2) utilizing the SPT-N value of each soil layer to plot a trend line changing along depth and dividing different soil layers in broken positions; (3) calculating the vertical correlation distance and the horizontal correlation distance of each soil mass and estimating the optimum vertical interval and horizontal exploration drilling interval of engineering investigation and sampling; and (4) calculating the variability coefficient of each soil mass in order to determine the minimum amount of test samples and exploration drilling. The technique and the method have the advantages of providing a quantification method taking soil variability into consideration, systematically and reliably designing geotechnical engineering investigation and sampling and using obtained data to design economical and safe foundations.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and provides a geotechnical engineering investigation and sampling technology based on soil variability, which mainly uses the probability method to quantify the inherent variability of soil, so as to determine the future geotechnical engineering investigation and sampling technology. Optimizing vertical and horizontal spacing, total survey and sampling volume and total test drilling volume. technical background [0002] Geotechnical engineering survey and sampling are necessary steps for all construction projects. The data, samples and test results obtained are used to design the foundation of construction projects. However, the existing geotechnical engineering survey and sampling technology is still lacking. Uniform, effective, reliable and standard methods, so it is not possible to know with certainty whether the scope and quantity of survey and sampling required are represen...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a geotechnical engineering survey and sampling technology based on soil variability, so that the geotechnical engineering survey and sampling technology still lacks a unified, effective, reliable and standard method. Survey and sampling Make a systematic and rational plan, so as to obtain representative and reliable survey and sampling data, and provide safe and secure design for the foundation of future construction projects

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