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

A technology of geotechnical engineering and variability, applied in the field of foundation soil survey, infrastructure engineering, construction, etc., can solve the problems of lack of unified, effective, reliable and standard methods

Inactive Publication Date: 2009-11-11
SUN YAT SEN UNIV
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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,

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

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Embodiment example

[0026] In this embodiment, a geotechnical engineering investigation and sampling technology based on soil variability is applied to the construction of airport facilities, large hotels, sports centers and highway projects in the COTAI section of Macau. The application process is as follows:

[0027] 1. According to the past geotechnical engineering survey data in Macao provided by engineering units, consulting companies, universities and government departments, the soil layers in this area are 24 meters thick clay layer and 22 meters thick sandy soil layer, and the establishment of geotechnical engineering survey database;

[0028] 2. Calculate the distance between optimal survey and sampling techniques, the specific steps are as follows:

[0029] Calculate the vertical and horizontal relative distances between clay and sand layers:

[0030] Clay: vertical correlation distance = 1.07m, horizontal correlation distance = 130

[0031] Sandy soil: vertical correlation distance ...

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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...

Claims

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Application Information

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IPC IPC(8): E02D1/02
Inventor 吴玉棠周翠英
Owner SUN YAT SEN UNIV
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