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Method for rapidly detecting foundation soil compactness by using penetrometer

A technology of foundation soil and penetration instrument, which is applied in the test of foundation structure, foundation structure engineering, and field foundation soil survey, etc., can solve the problems of high detection frequency, slow detection results, slow detection speed, etc., and achieves high accuracy. , the principle is simple, the effect of small error

Active Publication Date: 2014-03-12
ANHUI SANXING TESTING +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the degree of foundation soil compaction at the construction site is affected by the progress of the project due to high detection frequency, slow detection speed, and slow detection results, and provides a method for quickly detecting the degree of foundation soil compaction using a penetrometer. Using the detection method of the present invention, a group of samples can get results within 10-15 minutes, which can provide data quickly and accurately guide on-site construction

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  • Method for rapidly detecting foundation soil compactness by using penetrometer
  • Method for rapidly detecting foundation soil compactness by using penetrometer
  • Method for rapidly detecting foundation soil compactness by using penetrometer

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Embodiment 1

[0034] A method for quickly detecting the degree of compaction of foundation soil using a penetrometer in this embodiment, the specific steps are:

[0035] Step 1. Randomly select 25 filling construction sites within the target detection area. The target detection area in this embodiment is Shannan New District, Huainan City, Anhui Province. A piece of foundation soil area to be tested is randomly selected at the filling construction site, and samples to be tested are taken from the foundation soil area to be tested and sent to the laboratory for compaction tests to obtain the maximum dry density and optimum moisture content of the samples. The concrete operation steps that present embodiment obtains maximum dry density and optimum water content are:

[0036] (1) Take 20kg of the sample to be tested by the quartering method, air-dry and crush it through a 5mm round-hole sieve, mix the soil sample under the sieve, and measure the air-dried moisture content of the sample to be t...

Embodiment 2

[0052] A method for quickly detecting foundation soil compaction using a penetrometer in this embodiment is basically the same as in Embodiment 1, except that the target detection area in this embodiment is Panji District, Huainan City, Anhui Province. 21 filling construction sites were randomly selected in the area; the unary regression equation obtained in this embodiment is y=0.0481x+12.81, and the obtained 21 sets of sample information are shown in Table 2;

[0053] Table 2 Penetration resistance value-dry density data in Panji District, Huainan City

[0054]

[0055] The difference between the dry density of the foundation soil calculated by the unitary regression equation obtained in this embodiment and the dry density of the parallel samples measured in the laboratory is only 2.97%, and this error has little influence on the accuracy of the detection of the compactness of the foundation soil in this embodiment , can be ignored.

Embodiment 3

[0057] A method for quickly detecting foundation soil compaction using a penetrometer in this embodiment is basically the same as in Embodiment 1, except that the target detection area in this embodiment is Fengtai District, Huainan City, Anhui Province, and Fengtai 18 filling construction sites were randomly selected in the area; the unary regression equation obtained in this embodiment is y=0.0537x+12.2, and the obtained 18 groups of sample information are shown in Table 3;

[0058] Table 3 Penetration resistance value-dry density data in Fengtai District, Huainan City

[0059]

[0060] The error between the dry density of the foundation soil calculated by the unitary regression equation obtained in this embodiment and the dry density of the parallel samples measured in the laboratory is only 3.03%, and this error has little influence on the accuracy of the detection of the compactness of the foundation soil in this embodiment , can be ignored.

[0061] In this embodimen...

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Abstract

The invention discloses a method for rapidly detecting foundation soil compactness by using a penetrometer, and relates to the technical field of compactness detection. The method comprises the following steps: I, randomly selecting 18-25 fill construction fields, selecting a foundation soil region to be detected, extracting a test sample to be detected, and sending to a test room for performing compaction test to obtain the maximum dry density of the test sample; II, detecting the penetration resistance value of the foundation soil area to be detected which is treated in the step I on site by using a penetration resistance instrument; III, acquiring a unary regression equation of penetration resistance value-dry density, wherein a formula of the unary regression equation is Y=(aX)+b, wherein Y is dry density*10, X is the penetration resistance value, and a and b are regression coefficients; IV, detecting the penetration resistance value of the foundation soil, and introducing the penetration resistance value acquired by detecting into the unary regression equation obtained in the step III to obtain the dry density of the foundation soil of a fill construction fields. The method has the advantages of simple principle, accurate and efficient data testing and capability of accurately guiding field construction.

Description

technical field [0001] The invention relates to a method for rapidly detecting the degree of compaction of foundation soil, more specifically, to a method for rapidly detecting the degree of compaction of foundation soil by using a penetrometer. Background technique [0002] The foundation is the basic structure of the ground, which is the basis for supporting the ground structure. It bears the load together with the ground, and at the same time bears the erosion and impact of climate change and various natural disasters. The stress-strain characteristics of the foundation play an important role in the overall strength and stiffness of the ground structure. In the deformation of the ground structure, the deformation of the foundation accounts for about 70% to 90%. The foundation is generally filled and compacted in layers during the construction process, and the concealment is strong. If the quality of the filler is not good or the construction is not properly controlled, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/00E02D33/00
Inventor 张晓红康猛蔡范范王丽娜王学刚
Owner ANHUI SANXING TESTING
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