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Highway subgrade compaction quality rapid detection method based on dynamic rebound modulus

A technology of dynamic resilience modulus and compaction quality, which is applied in the survey of on-site foundation soil, roads, roads, etc., can solve the problems of lack of direct corresponding detection and evaluation methods for design indicators, and achieve rapid detection and evaluation and efficient control, The effect of wide application range and improvement of detection efficiency

Inactive Publication Date: 2020-06-05
安徽省高速公路试验检测科研中心有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the existing construction and quality assessment codes lack a direct corresponding detection and assessment method for the design index of the interlayer compaction strength (dynamic modulus of resilience) during the construction process.

Method used

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  • Highway subgrade compaction quality rapid detection method based on dynamic rebound modulus
  • Highway subgrade compaction quality rapid detection method based on dynamic rebound modulus
  • Highway subgrade compaction quality rapid detection method based on dynamic rebound modulus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1 takes the soil-filled subgrade as an example, and the specific test steps are as follows:

[0048] Step 1. According to the requirements of the design specifications, select the subgrade filler CBR=3%, and estimate the rebound modulus value M under the standard state R = 35.6MPa.

[0049] Step 2. Select a certain test section at the corresponding roadbed construction site as the test area, and roll it step by step;

[0050] Step 3. After each rolling is completed, randomly select a test point in the test section area, and use a portable dynamic modulus of resilience tester to measure the dynamic modulus of resilience E of this point i value, and record the data.

[0051] Step 4, then use the sand filling method to detect the degree of subgrade compaction K under the rolling times i ;

[0052] Step 5. Repeat steps 3 to 4. After each rolling, no less than 15 pieces of dynamic elastic modulus data are measured, and abnormal data are eliminated, and the dyn...

Embodiment 2

[0061] Embodiment 2 takes soil-rock mixed-fill subgrade as an example, and the specific test steps are as follows:

[0062] Step 1. According to the requirements of the design specifications, select the subgrade filler CBR=2%, and estimate the rebound modulus value M under the standard state R = 27.4MPa.

[0063] Step 2. Select a certain test section at the corresponding roadbed construction site as the test area, and roll it step by step;

[0064] Step 3. After each rolling is completed, randomly select a certain number of test points in the test section area, and use a portable dynamic modulus of resilience tester to measure the dynamic modulus of resilience E of the point. i value, and record the data;

[0065] Step 4, then use a high-precision level to detect the subgrade settlement value, and record the data;

[0066] Step 5. Repeat steps 3 to 4, and use the settlement difference between every 2 rollings as the construction control index. When the settlement difference...

Embodiment 3

[0071] Embodiment 3 takes the stone-filled subgrade as an example, and the specific test steps are as follows:

[0072] Step 1. According to the requirements of the design specifications, select the subgrade filler CBR=4%, and estimate the rebound modulus value M under the standard state R = 42.7MPa.

[0073] Step 2. Select a certain test section at the corresponding roadbed construction site as the test area, and roll it step by step;

[0074] Step 3. After each rolling is completed, randomly select a certain number of test points in the test section area, and use a portable dynamic modulus of resilience tester to measure the dynamic modulus of resilience E of the point. i value, and record the data;

[0075] Step 4, then use a high-precision level to detect the subgrade settlement value, and record the data;

[0076] Step 5. Repeat steps 3 to 4, and use the settlement difference between every 2 rollings as the construction control index. When the settlement difference Δ ...

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Abstract

The invention discloses a highway subgrade compaction quality rapid detection method based on dynamic rebound modulus and relates to the field of highway subgrade compaction quality control. The method comprises the steps that firstly, according to the current specification, the subgrade filler type is determined, a subarea subgrade filler CBR value is measured, a rebound modulus value under the standard state is estimated, test sections are carried out on site, and layering rolling is carried; secondly, after rolling of each time is completed, in the test section area, a test point is selected randomly, a portable dynamic rebound modulus tester is utilized for measuring the dynamic rebound modulus value of the point, and data is recorded; thirdly, in the rolling construction process, thequantitative relation between the subgrade dynamic rebound modulus value and the subgrade compaction degree, the void ratio or the compaction settlement difference is set up; and fourthly, during siteapplication, the test point is selected randomly, the dynamic rebound modulus of the point is measured and recorded, a dynamic rebound modulus representative value is calculated, and a representativevalue method and an extremum method are adopted for carrying out determining. According to the method, compaction quality of subgrade filler can be detected rapidly, use is convenient and rapid, anddata is accurate and reliable.

Description

technical field [0001] The invention relates to the field of roadbed filler compaction quality control, in particular to a method for quickly detecting the compaction quality of roadbeds based on dynamic resilience modulus. Background technique [0002] The roadbed is the foundation of the road. The quality of the roadbed directly determines the performance and service life of the road. With the rapid development of the road industry, the standards for road quality are gradually increasing. The insufficient quality of roadbed filling and compaction will lead to a series of problems in the subsequent use process. Road diseases and engineering hidden dangers. [0003] The commonly used on-site testing methods for the compaction quality of subgrade fillings in existing regulations, whether it is sand filling method, water filling method or settlement difference method, etc., have problems such as low efficiency and great influence of human factors, and are often not good in act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/08E01C21/00
CPCE01C21/00E02D1/08
Inventor 王建立束冬林孙狂飙沈国栋方明镜杨晓明王文炳程华才蒲阳王亮吕韶全
Owner 安徽省高速公路试验检测科研中心有限公司
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