High fill compaction quality real-time evaluation method considering underlying surface influence

Abstract

The invention belongs to the field of high fill engineering construction quality control. The objective of the invention is to realize comprehensive and real-time evaluation of the fill compaction quality under different underlying surface or boundary constraint conditions. According to the invention, the high fill compaction quality real-time evaluation method considering the underlying surface influence is provided; firstly, a compaction process real-time monitoring device is used for collecting rolling compaction parameters of a lower layer and an upper layer, and meanwhile, a PDA is used for collecting on-site test pit test results of the upper layer, and the on-site test pit test results comprise the water content w, the grading P and the compaction quality parameter compaction degreeD or the dry density rho or the porosity e which reflect the material property; secondly, a regression model of the compaction quality, the rolling compaction parameters, the material property parameters and the underlying surface, namely a fill compaction quality evaluation model considering the influence of the underlying surface is established; and finally, based on the model, the compaction quality of the corresponding position on the construction bin surface is calculatd by utilizing the rolling compaction parameters, the rolling wheel acceleration signals and the material property parameters which are acquired in real time. The method is mainly applied to high fill engineering construction quality control occasions.

Description

technical field [0001] The invention relates to the field of construction quality control of high fill engineering (such as roadbeds, earth-rock dams, etc.), in particular to a real-time evaluation method for fill compaction quality under different underlying surface conditions. Background technique [0002] In fill projects such as earth-rock dams and high fill subgrades, uneven underlying surfaces caused by variable geological conditions or uneven paving of materials are common. For example, in the construction of earth-rock dams, the underlying surfaces of the strips adjacent to the bank slopes on both sides are hard mountains, which are more rigid than the underlying surfaces after normal compaction, resulting in uneven underlying surfaces under the same warehouse surface The formation of the surface; or when the filler with a larger particle size is used, the uneven paving of the material leads to the concentration of larger stones in a certain area, forming an uneven u...

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Problems solved by technology

At the same time, research [13,14] It shows that the rolling parameters (driving speed, rolling times, compaction thickness, etc.) and filler properties (moisture content, gradation, etc.) have a significant impact on the compaction index and compaction quality, but the above-mentioned research ignores the above factors Influence on the evaluation of compaction quality, which is incomplete in the evaluation of compaction quality

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