QUALITY CONTROL METHOD OF SOIL STRUCTURE: Fid-Bau Portal

QUALITY CONTROL METHOD OF SOIL STRUCTURE

OCHIAI HIROMASA / TAKAO TOMOHITO / MINATO TARO / HIGASHIKAWA SOMA

To provide a quality control method of a soil structure capable of easily and accurately controlling quality of a target soil structure by focusing on a resistivity value, which is a value specific to each soil type, while measuring in parallel with embankment construction in construction of the soil structure.SOLUTION: A quality control method of a soil structure includes: a laboratory compaction test using standard soil materials; a test construction to compact the standard soil materials; and an actual construction to compact the soil material at a construction site. The laboratory compaction test includes a maximum dry density acquisition step and a density ratio acquisition step. The test construction includes a test moisture content or test volumetric moisture content acquisition step, an Nt-γd ray acquisition step, and an Nt-ht ray acquisition step. The actual construction includes a step of acquiring on-site moisture content or on-site volumetric moisture content, a step of acquiring on-site resistivity value, a step of acquiring on-site dry density, and a step of comparing the density ratio. In the quality control method, the on-site resistivity value acquisition step, the on-site dry density acquisition step, and the density ratio comparison step are executed repeatedly.SELECTED DRAWING: Figure 1

【課題】土構造物の施工において、盛土施工に並行して測定可能であり、それぞれの土質に固有な値である比抵抗値に着目することにより、対象とする土構造物の品質管理を簡便かつ正確に行うことが可能な土構造物の品質管理方法を提供すること。【解決手段】標準材料土を締固める室内試験と、標準材料土を締固める試験施工と、現地材料土を締固める本施工とを有する土構造物の品質管理方法であって、室内試験は、最大乾燥密度取得工程と、密度比取得工程とを備え、試験施工は、試験含水比または試験体積含水率取得工程と、Ｎｔ－γｄ線取得工程と、Ｎｔ－ｈｔ線取得工程と、目標転圧回数取得工程とを備え、本施工は、現地含水比または現地体積含水率取得工程と、現地比抵抗値取得工程と、現地乾燥密度取得工程と、密度比比較工程とを備え、現地比抵抗値取得工程、現地乾燥密度取得工程及び密度比比較工程を繰り返し行うことを特徴とする。【選択図】図１

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