Basic study on the seepage control work of the waste landfill site by sheet piles for prevention of water pollution

垃圾填埋场板桩防渗工程防治水污染的基础研究

• 批准号: 15560429
• 负责人: HIRO-OKA Akihiko
• 金额: $ 1.09万
• 依托单位: Kyushu Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560429/
• 关键词: centrifuge; restraint of diffusion of contaminant; seepage control work; sheet pile; advection-diffusion problem; death of penetration; clay ground; 地盤環境; 汚染物質; 移流拡散; 廃棄物処理場; 遮水鋼矢板; 数値解析; 廃棄物処分場; 遮水工矢板

In this study we have carried out a series of centrifuge model tests to investigate the influence of the penetration depth of a steel sheet pile and the difference of water level between inside and outside the sheet pile on the performance in diffusion control of contaminant when a sheet pile wall penetrated into the low permeability soil layer on the high permeability soil layer. We also carried out convective hydraulic dispersion analysis based on GMS under the same condition with centrifuge model tests to compare the results of experiments and calculations. The conclusions derived from this study are below.1)The increment of time for reaching the concentration ratio of contaminant C/CO at the clay layer surface outside the sheet pile to the specified value to the increment of penetration depth of a sheet pile depends on the conditions of the soil layers. Design by existing simplified method gives both conservative and unsafe evaluations on the time for reaching varying with the specified C/CO value.2)The more penetration depth of a sheet pile, the higher performance in diffusion control of the contaminant we get. However, the performance in diffusion control of the contaminant becomes low when the sheet piles were penetrated to the depth near a high permeability soil layer which exists under a low permeability soil layer.

本研究开展了一系列离心机模型试验，研究钢板桩的贯入深度和板桩内外水位差对钢板桩在钢板桩作用下污染物扩散控制性能的影响。桩墙渗入高渗透土层上的低渗透土层。我们还与离心机模型试验在相同条件下进行了基于GMS的对流水力弥散分析，以比较实验和计算的结果。研究得出以下结论： 1)板桩外粘土层表面污染物C/CO浓度比达到规定值所需时间增量与板桩贯入深度增量的关系为土层的条件。现有简化方法的设计对随规定的C/CO值变化的达到时间给出了保守和不安全的评估。2)板桩的穿透深度越深，我们获得的污染物扩散控制性能越高。然而，当板桩穿透至存在于低渗透性土层下方的高渗透性土层附近的深度时，污染物扩散控制的性能变低。

项目成果

The influence of the depth of penetration of sheet pile wall on the advection and diffusion of contaminant

板桩墙侵彻深度对污染物平流扩散的影响

• 发表时间: 2004
• 期刊: Proceedings of 39^<th> Japan National Conference on Geotechnical Engineering
• 作者: HIRO-OKA;A et al.
• 通讯作者: A et al.

遮水鋼矢板の根入れ長の変化が汚染物質の拡散抑制性能に及ぼす影響について

挡水钢板桩贯入长度变化对污染物扩散控制性能的影响

• 发表时间: 2006
• 期刊: 第41回地盤工学研究発表会講演集 (印刷中)
• 作者: 廣岡明彦;川内崇文;永瀬英生;原田剛男
• 通讯作者: 原田剛男

遮水鋼矢板の根入れ長が浸出汚水の浸透・拡散現象に与える影響について

关于挡水钢板桩贯入长度对渗滤液污水渗透扩散现象的影响

• 发表时间: 2004
• 期刊: 第39回地盤工学研究発表会講演集
• 作者: 廣岡明彦;江藤崇;川内崇文
• 通讯作者: 川内崇文

The influence of the depth of sheet pile penetration on the performance in restraining the contaminant spread

板桩贯入深度对抑制污染物扩散性能的影响

• 发表时间: 2006
• 期刊: Proceedings of 41^<st> Japan National Conference on Geotechnical Engineering (Now printing)
• 作者: HIRO-OKA;A et al.
• 通讯作者: A et al.

鋼矢板の貫入量が汚染物質の浸出抑制性能に与える影響について

钢板桩贯入量对污染物淋滤控制性能的影响

• 发表时间: 2006
• 期刊: 平成17年土木学会西部支部研究発表会講演概要集
• 作者: 廣岡明彦;永瀬英生;川内崇文;原田剛男
• 通讯作者: 原田剛男