METHOD FOR ESTIMATING STRENGTH OF FOOT PROTECTION PART

• Main Author: YODA YUYA
• Format: Patent
• Language: English; Japanese
• Published: 02.08.2018
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

PROBLEM TO BE SOLVED: To provide a method for stably estimating the strength of a foot protection part regardless of the amount of ground material.SOLUTION: A method for estimating the strength of a foot protection part comprises a first step of collecting constituents of a layer 12 from the layer 12 where a foot protection part 32 of the ground is formed as a first sample, a second step of producing and solidifying a plurality of types of cement milk containing the first sample as an aggregate, and determining a relational expression between the cement water ratio of the cement milk containing the first sample as an aggregate and the compression ratio thereof from the cement water ratio of the cement milk and the compressive strength after solidification, a third step of injecting the cement milk 21 into a bottom of an excavated pile hole 1 and collecting the injected cement milk 21 as a second sample, a fourth step of determining the cement water ratio of the second sample, and a fifth step of estimating the compressive strength of the foot protection part 32 from the cement water ratio of the second sample and the relational expression calculated in the second step.SELECTED DRAWING: Figure 3 【課題】地盤材料の量に関わらず安定した根固め部の強度推定方法を提供する。【解決手段】地盤の根固め部３２が形成される層１２から層１２の構成物を第一の試料として採取する第一の工程と、第一の試料を骨材として含むセメントミルクを複数種類生成して固化させ、それらセメントミルクのセメント水比と固化後の圧縮強度とから、第一の試料を骨材として含むセメントミルクのセメント水比と圧縮強度との関係式を求める第二の工程と、掘削した杭穴１の底部にセメントミルク２１を注入し、注入後のセメントミルク２１を第二の試料として採取する第三の工程と、第二の試料のセメント水比を求める第四の工程と、第二の試料のセメント水比及び第二の工程で算出した関係式から、根固め部３２の圧縮強度を推定する第五の工程と、を有する。【選択図】図３