A Method for Estimating Shear Wave Velocity Based on Standard Penetration Test

A standard penetration test and standard penetration technology, which is applied in the field of foundation soil survey, foundation structure engineering, construction, etc., can solve the problems of low accuracy, misjudgment of construction site category, inability to perform shear wave testing, etc. problem, to achieve the effect of improved accuracy

Inactive Publication Date: 2021-06-15
SOUTHEAST UNIV +1
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Problems solved by technology

In the feasibility study stage of the site, if drilling is not carried out, the shear wave test cannot be carried out. How to estimate the wave velocity more accurately has become an urgent problem to be solved.
Existing codes provide an estimation formula for shear wave velocity, but in actual use, it can be found that its accuracy is not high, which often leads to misjudgment of the type of construction site and cannot meet the requirements of engineering use

Method used

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  • A Method for Estimating Shear Wave Velocity Based on Standard Penetration Test
  • A Method for Estimating Shear Wave Velocity Based on Standard Penetration Test
  • A Method for Estimating Shear Wave Velocity Based on Standard Penetration Test

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Embodiment Construction

[0015] Such as figure 1 As shown, a shear wave velocity estimation method based on standard penetration experiments includes the following steps:

[0016] Step (1): Define the representative soil layer, determine the soil type, and determine the standard penetration parameter N value corresponding to each representative soil layer;

[0017] In order to reduce the dispersion of the standard penetration parameter N value, when the thickness of the same soil layer is large, the standard penetration test points in the soil layer are grouped, and the average value is taken as the reference N value, according to the situation of the given data , use the following method to group the data;

[0018] a. When the thickness of the soil layer d≤2m, divide them into one group, and within this range, there is only one standard penetration test point;

[0019] b. When the thickness of the soil layer is 2m

[0020] c. When the thickness of the soil layer d>5m,...

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Abstract

The invention discloses a method for estimating shear wave velocity based on a standard penetration test. The method uses gray relational analysis and takes into account the effective overlying soil pressure σ' of the soil layer v and void ratio e, through the function fitting method, the standard penetration value N and the effective overlying soil pressure σ′ of the soil layer are established v , The relationship between the void ratio e value and the shear wave velocity, so as to estimate the shear wave velocity. This method is based on the conventional standard penetration test, which can measure the shear wave velocity more conveniently and with higher measurement accuracy.

Description

technical field [0001] The invention belongs to the field of foundation soil site category discrimination in geotechnical engineering investigation and building anti-seismic, and relates to a shear wave velocity estimation method based on a standard penetration test. Background technique [0002] At present, judging the building site category according to the range of equivalent shear wave velocity is one of the recognized site category classification methods. The site category has a great influence on the seismic design of building structures, and even affects the selection of structural schemes. In the feasibility study stage of the site, if drilling is not carried out, the shear wave test cannot be carried out. How to estimate the wave velocity more accurately has become an urgent problem to be solved. Existing codes provide an estimation formula for shear wave velocity, but in actual use, it can be found that its accuracy is not high, which often leads to misjudgment of ...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E02D1/02
Inventor赵学亮刘益平丁鹏程张驰黄钺余涛任治军任亚群葛海明王小龙王俊超吴学银孙焯
OwnerSOUTHEAST UNIV