Study on a conventional method of an allowable local settlement and barrier performance of the compacted soil barrier layer in waste landfill

垃圾填埋场压实土阻隔层局部允许沉降常规方法及阻隔性能研究

• 批准号: 23560588
• 负责人: IMAIZUMI SHIGEYOSHI
• 金额: $ 3.16万
• 依托单位: Utsunomiya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560588/
• 关键词: 廃棄物最終処分場; 土質系遮水工; 局所沈下; 画像解析; 模型実験; 浸透性

Trap door tests in the laboratory and local settlement tests in the field for the compacted soil barrier layer that was made by mixing a sodium type bentonite of 10 % into crashed rock sand were conducted. The main results are that a crack appeared on the bottom surface of the soil layer just above the end of settling zone and progressed upward slantingly, the area having a crack wider than 2 mm on the top surface decreased considerably the function of barrier, placing a geonet beneath the soil layer was a bit effective to prevent a crack from creating and progressing and increasing a concentration of calcium ion of the liquid decreased a value of local settlement at which a crack appeared. Then the value of angle deformation at which a crack extended to the middle height of the soil layer was found to be 0.16 by analyzing the experimental data. The allowable local settlement was estimated to be around 50 mm based on the angle deformation.

对在碎石砂中掺入10%钠型膨润土制成的压实土防渗层进行了室内活板门试验和现场局部沉降试验。结果表明：沉降带末端上方土层底面出现裂缝，裂缝呈倾斜向上扩展，顶面裂缝宽度大于2mm的区域屏障作用明显减弱，在土壤层下放置土工网对防止裂缝的产生和发展有点效果，并且增加液体的钙离子浓度降低出现裂缝时的局部沉降值。通过对试验数据的分析，得到裂缝延伸至土层中间高度时的角变形值为0.16。根据角度变形，估计允许的局部沉降约为50 mm。

项目成果

今泉繁良:平成23年度～25年度科学研究 費助成事業(基盤研究C)研究成果報告書(冊 子体)「最終処分場土質系遮水層の許容局所 沈下量簡易評価法と遮水性評価に関する研究」 全59ページ 平成26年3月

今泉重义：2011年度～2011年度科学研究补助金项目（基础研究C）研究成果报告书（小册子）《最终处置场土壤防渗层允许局部沉降的简易评价方法及防渗性评价》59页 2014年3月

Model Tests on Barrier Performance of the Bentonite Mixed Soil Layer undergoing Local Settlement

局部沉降膨润土混合土层阻隔性能模型试验

• 发表时间: 2012
• 期刊: Proc. of 2012 Japanese-Chinese Joint Symposium
• 作者: K. Kudo;S. Imaizumi
• 通讯作者: S. Imaizumi

Efficiency of Placement of Geonet under BMS Layer subject to Local Settlement

BMS层下土工网的放置效率受当地沉降影响

• 发表时间: 2012
• 期刊: Proc. of the Seventh Asia-Pacific Landfill Symposium
• 作者: S. Imaizumi;K. Kudo;S. Matsuyama;S. Usami
• 通讯作者: S. Usami

局所沈下するベントナイト混合土層の浸透性評価

局部沉降膨润土混合土层渗透性评价

• 发表时间: 2012
• 作者: 藤田恭之;小野泰樹;今泉繁良
• 通讯作者: 今泉繁良

Large Model Tests on the Bentonite Mixed Soil Layer undergoing Local Settlement

局部沉降膨润土混合土层大型模型试验

• 发表时间: 2013
• 期刊: Proc. of the 14th International Waste Management and Landfill Symposium
• 作者: S.Imaizumi;S.Usami;S.Matsuyama;H.Kudo;T.Harada;M.Nonoda and H.Kano
• 通讯作者: M.Nonoda and H.Kano