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石灰安定処理土の凍上抑制機構に関する研究

石灰稳定土冻胀抑制机理研究

基本信息

批准号：
08750614
负责人：
川端伸一郎
金额：
$ 0.64万
依托单位：
Hokkaido Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Encouragement of Young Scientists (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08750614/
关键词：
石灰安定処理凍上透水係数 pF試験

项目摘要

石灰安定処理土の凍上抑制効果に与える影響因子を明確にするため土中の水分特定に着目し,各種の改良条件でpF試験,透水試験および凍上試験を行った。安定処理土は添加率や養生日数の延長により凍上量が減少し,特に養生日数の影響が顕著であった。日数と凍上性に密接な関係がみられることは,時間経過に伴う複数の反応のうち長期反応であるポゾラン反応が凍上抑制と密接に関係している。しかし,一般に考えられている安定処理土の凍上抑制原理の一つである透水性の低下は比較的短期間で一定値に収束し,養生日数と一義的な関係にある凍上抑制効果との関連性は低いことが確認された。また,本研究では凍結面への水分移動力の評価として土中水分のエネルギー状態をpF試験の結果から考察した。その曲線形状などから間隙の種類や構造を評価できる水分分布曲線を求めることにより,養生による安定処理土の間隙構造(サクション)の変化を明確にすることができた。凍上性を示した未改良土は高pF領域の水分量が多く,高いサクション力を有していた。これに対し,安定処理土は日数の延長に伴い高pF領域の水分量が減少し,低pF領域の水分が増加する傾向にあることが判った。すなわち,安定処理の凍上抑制の発現機構としては透水性の低下ではなく,凍結面への水分供給力(サクション)の低下によるものが大きいことが明確にされた。

The inhibitory effect of lime stabilization treatment on the soil and its influencing factors are clearly defined, and the specific moisture content in the soil is determined. Various improved conditions are used for pF tests, and water permeability tests are performed on frozen soil. The addition rate of stabilizing treated soil can extend the number of days of nourishment, reduce the amount of frozen food, and the effect of the number of days of special treatment can be reduced. The number of days and days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, the number of days, and the number of days応のうちA long-term reaction is a long-term reaction and a close relationship is suppressed.しかし,Generally speaking, it is a relatively short period of time when the water permeability of the stabilized treated soil is reduced due to the freezing principle. The relationship between the certain value and the relationship between the number of days and days of maintenance is the same as the inhibitory effect on the freeze and the correlation is low and the relationship is confirmed.また, this study is based on the evaluation of the moisture movement force of the frozen surface and the status of the moisture in the soil and the results of the pF test.そのcurve shapeなどからkind of gapのstructureをreview価できるmoisture distribution curveをfindingめることにより, the health-preserving and stabilizing treatment of the gap structure of the soil (サクション) has been made clear and clear. The freezing properties indicate that the moisture content of unimproved soil in the high pF field is too much, and that the moisture content of the high pF field is high is the same. The number of days to stabilize the treated soil is extended and the moisture content in the high pF area is reduced, and the moisture content in the low pF area is increased and the tendency is increased.すなわち, stabilization treatment のfreeze suppression の発appearance mechanism としてはwater permeability のlower ではなく, freezing The water supply capacity of the noodles is low and the water supply is large and clear.