QUALITY MANAGEMENT METHOD OF CEMENT-BASED IMPROVED GROUND

• Main Authors: ASAKA MIHARU, YODA YUYA
• Format: Patent
• Language: English; Japanese
• Published: 07.10.2021
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

To provide a quality management method of a cement-based improved ground allowing construction quality in a depth direction to be determined right after construction of an improved ground.SOLUTION: A method for managing the construction quality of a cement-based improved ground to be constructed by adding a cement-based solidification material to the original ground and mixing and agitating in-situ comprises steps of: a step S6 for collecting soil cement in an unconsolidated state from a plurality of depth positions in the improved ground right after the construction; a step S7 for estimating the amount of solidification material included in the collected soil cement; and a step S8 for determining the construction quality of the soil cement at each of the depth positions by comparing the estimated amount of the solidification material and the amount of addition of the solidification material required to achieve a specific design reference strength.SELECTED DRAWING: Figure 1 【課題】深さ方向の施工品質を改良地盤の施工直後に判定することができるセメント系改良地盤の品質管理方法を提供する。【解決手段】セメント系固化材を原地盤に添加して原位置で混合撹拌することによって施工されるセメント系改良地盤の施工品質を管理するための方法であって、施工直後の改良地盤の複数の深さ位置から、未固結状態のソイルセメントを採取するステップＳ６と、採取したソイルセメントに含まれる固化材量を推定するステップＳ７と、推定した固化材量と、所定の設計基準強度の発現に必要な固化材添加量とを比較して、各深さ位置におけるソイルセメントの施工品質を判定するステップＳ８を有するようにする。【選択図】図１