The elasto-plastic properties of naturally deposited and artificial ground in teims of structure, overconsolidatnn and anisotropy

自然沉积和人工地基在结构、超固结和各向异性方面的弹塑性特性

• 批准号: 18360227
• 负责人: ASAOKA Akira
• 金额: $ 11.1万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360227/
• 关键词: naturally deposited ground; deformation analysis; elasto-plastic; soil property; soil skeleton structure; intermediate soil; clay; sand; 自然堆積地震

1) Evaluation of optimum condition of remolded samples for the determination of the elasto-plastic parameters.A optimum water content for making remolded clay is its liquid limit.2) Determination of soil properties of naturally deposited clay and sand.Soil properties of naturally deposited clay and sand can be estimated by simulating a series of process which contain soil sampling, setting in the apparatus, and laboratory testing.3) Estimation of deformation and failure of a test embankment on unusual soil ground.Research result 2) can be applied to unusual soil. The predictive simulation of circular-slip failure process of a test embankment on unusual soil ground was successful.4) Prediction of large delayed consolidation of soft clay due to embankment loading.The clay of foundation, which exhibits a long-term large settlement beyond the conventional prediction, can have sensitivity ratio of more than 8.0 and the compression index ratio Cc/Ccr, more than 1.5. The occurrence of in-situ delayed consolidation of clay foundation in Nakajo can be described by taking the sample disturbance into consideration with the Schmertmann's method.5) Improvement of reclaimed ground with intermediate soils by cavity expansion due to sand piles.Research result 2) can be also applied to intermediate soil. The manmade island is highly structured and heavily overconsolidated before improvement. The soil improvement makes the ground less structured and normally consolidated.

1)重塑土的最佳含水量是其液限。2）天然沉积粘土和砂的土壤性质的测定。通过模拟土壤取样、放置在仪器中、测定土壤性质的一系列过程，可以估计天然沉积粘土和砂的土壤性质。3）对某特殊地基上路堤的变形破坏进行了估算，研究结果2）可应用于特殊地基。4）路堤荷载作用下软粘土的大滞后固结预测：软粘土地基的长期大沉降超过常规预测，敏感性比可达8.0以上，压缩指数比Cc/Ccr可达1.5以上。中条地区粘土地基原位延迟固结现象的发生，可以用Schmertmann方法考虑试样扰动进行描述。5）砂桩扩孔改良中间土填筑地基研究结果2）也适用于中间土。人工岛在改善前高度结构化，严重过度固结。土壤改良使地面结构化程度较低，通常情况下是固结的。

项目成果

Improvement of manmade island filled with intermediate soils by SCP method

SCP法改良填筑中间土人工岛

• 发表时间: 2007
• 期刊: Proc. of 13th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, Kolkata, India
• 作者: Yamda;E.;Nakano;M
• 通讯作者: M

All soils all states all round geo-analysis integration

所有土壤所有状态全方位地理分析集成

• 发表时间: 2007
• 期刊: International Workshop on Constitutive Modelling -Development, Implementation, Evaluation, and Application 1
• 作者: Akira Asaoka;Toshihiro Noda
• 通讯作者: Toshihiro Noda

盛土載荷に伴う遅れ圧密大沈下を示す地盤の判定法と沈下予測法の提案

提出确定由于路堤荷载而出现较大延迟固结沉降的地面的方法和预测沉降的方法

• 发表时间: 2007
• 期刊: 第42回地盤工学研究発表会 平成19年度発表講演集 1(印刷中)
• 作者: Akira Asaoka;Toshihiro Noda;浅岡顕 ほか5名
• 通讯作者: 浅岡顕 ほか5名

Some distinct characteristics of natural clay that yields large residual consolidation settlement

天然粘土的一些明显特征会产生大量残余固结沉降

• 发表时间: 2006
• 期刊: Proc. of 3rd Int. Workshop on New Frontiers in Computational Geomechanics (IWS-XJAN 2006), Xian, China
• 作者: Nakano;M.;Tashiro;M.;Noda;T.;Inagaki;M
• 通讯作者: M

盛土材料としての中間土の物理特性,力学特性の把握

了解作为路堤材料的中间土的物理和力学特性

• 发表时间: 2007
• 作者: Nakano;M.;Tashiro;M.;Noda;T.;Inagaki;M;板橋一志;西尾直人
• 通讯作者: 西尾直人