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Online evaluation method for compaction quality of earth and rockfill dam material

A technology of compaction quality and earth-rock dam, which is applied in the field of foundation soil survey, construction, infrastructure engineering, etc., can solve the problems such as the compaction quality of earth-rock dam materials that cannot be fully applied, and achieve the effect of avoiding interference

Inactive Publication Date: 2013-04-03
TIANJIN UNIV
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Problems solved by technology

[0005] However, the above-mentioned devices are basically concentrated in the field of road construction. Due to the properties of earth-rock dam materials (gradation, water content, dry density, etc.), and the different parameters of compaction quality control, different control strategies, evaluation indicators, etc., are different from road subgrade soil materials. Therefore, the above-mentioned devices for monitoring the compaction quality of road soil materials are not completely suitable for characterizing the compaction quality of earth-rockfill dam materials.

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  • Online evaluation method for compaction quality of earth and rockfill dam material

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[0059] An online evaluation method for the compaction quality of earth-rock dam materials, using the field test pit test results collected by PDA, including water content w, gradation P and compaction quality (compaction degree D or dry density ρ or porosity e), The rolling parameters (travel speed ν, compaction thickness h, excitation force output state J, rolling times n ), and the compaction effect index C at the test pit collected by the dam material effect real-time monitoring device installed on the rolling machine, to establish the compaction quality and rolling parameters, compaction effect index and moisture content of different dam materials , gradation regression model (that is, the compaction quality evaluation model); on this basis, the real-time monitoring system for the rolling process is used to collect the rolling parameters (ν, h, J, n) and the dam material pressure of the current construction warehouse surface in real time. The compaction effect index C of t...

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Abstract

The invention provides an online evaluation method for compaction quality of an earth and rockfill dam material and provides an online evaluation method for compaction quality of a dam material, which is suitable for monitoring rolling parameters and compaction effect in real time and taking dam material property into consideration. The compaction quality of the earth and rockfill dam material is comprehensively evaluated in real time; and a technical scheme adopted in the method is that the online evaluation method for the compaction quality of the earth and rockfill dam material comprises the following steps: collecting field test pit experiment results by using a PDA (Personal Digital Assistant); establishing a compaction quality evaluation model; figuring out the compact quality of each grid of the current construction bin surface; next, obtaining the compaction quality in any position of the current full construction bin surface by using a spatial interpolation method; furthermore, analyzing a quality qualified or disqualified area according to a compaction quality control principle, figuring out qualified rate of the compaction quality of the current construction bin surface; and feeding back the qualified rate in time to instruct field construction so as to control construction quality. The online evaluation method for the compaction quality of the earth and rockfill dam material, provided by the invention, is mainly applied to online evaluation of the compaction quality of the earth and rockfill dam material.

Description

technical field [0001] The invention relates to the field of dam construction quality control in the field of water conservancy and hydropower engineering, in particular to an online evaluation method for the compaction quality of earth-rock dam materials. Background technique [0002] The conventional evaluation method for the compaction quality of earth-rock dams is to use limited test pit tests to randomly check the rolling quality of the construction warehouse surface. Due to the limited sampling, this method cannot fully reflect the compaction quality of any position on the entire construction warehouse surface; at the same time, because the test results cannot be obtained quickly, which affects the construction progress, it cannot meet the requirements of high-strength and highly mechanized earth-rock dam construction. Require. Real-time monitoring of compaction information during the rolling process of earth-rock dams and online evaluation of the compaction quality o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/08
Inventor 刘东海李子龙
Owner TIANJIN UNIV
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