A method for determining the maximum dry density of a super-large particle size wide gradation soil and rock mixture and a construction backfill quality control method

The maximum dry density of soil-rock mixture is determined by on-site rolling tests or dynamic compaction tests, which solves the problem of compaction deviation caused by particle size limitation in existing technologies and achieves more accurate compaction detection and engineering quality control.

CN116858724BActive Publication Date: 2026-06-16POWERCHINA HUADONG ENG CORP LTD
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
POWERCHINA HUADONG ENG CORP LTD
Filing Date
2023-06-16
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing technologies, when determining the maximum dry density of soil-rock mixtures, limit the particle size of indoor compaction testing devices to a small size, causing the compaction test results to deviate from reality during actual construction, resulting in false pass or fail phenomena, which affects the quality of the project.

⚗Method used

The maximum dry density under different paving thicknesses and gradation conditions is determined on-site through rolling tests or dynamic compaction tests. Combined with the actual on-site construction, test materials with different gradation conditions and particle content are used to conduct tests to obtain a more accurate maximum dry density.

🎯Benefits of technology

It improves the accuracy of compaction testing, ensures project quality, avoids repeated construction, shortens the construction period, and improves construction efficiency and economic benefits.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN116858724B_ABST
    Figure CN116858724B_ABST
Patent Text Reader

Abstract

The present application relates to earthwork backfill engineering technical field, specifically relates to a kind of super large particle size wide gradation soil and stone mixture maximum dry density determination method, using large tonnage convex block roller compaction or dynamic compaction compaction, obtain the maximum dry density under different gradation conditions, and under different gradation conditions, different more than 20mm particle content, without technical treatment to the super-diameter particles in the original gradation of soil and stone mixture.In construction, with the measured gradation curve and more than 20mm particle content, compared with different gradation conditions, and under different gradation conditions, different more than 20mm particle content conditions, the larger of the two under the closer gradation condition and the closer gradation condition more than 20mm particle content is the maximum dry density.The maximum dry density determined by this method is closer to the actual construction condition, which can truly, objectively and accurately reflect the maximum dry density of soil and stone mixture, and ensure the construction quality of the project.
Need to check novelty before this filing date? Find Prior Art