| 引用本文: | 周小文,蒋浩然,周密,程力,韩泽军.垂直扩容垃圾挡坝稳定性离心机试验与数值仿真[J].哈尔滨工业大学学报,2020,52(11):157.DOI:10.11918/201905067 |
| ZHOU Xiaowen,JIANG Haoran,ZHOU Mi,CHENG Li,HAN Zejun.Centrifuge test and numerical simulation on stability of vertically extended earth dam in landfill project[J].Journal of Harbin Institute of Technology,2020,52(11):157.DOI:10.11918/201905067 |
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| 垂直扩容垃圾挡坝稳定性离心机试验与数值仿真 |
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周小文1,2,蒋浩然1,2,周密1,2,程力1,2,韩泽军1,2
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(1.亚热带建筑科学国家重点实验室(华南理工大学),广州 510640; 2.华南理工大学 华南岩土研究院,广州 510640)
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| 摘要: |
| 垃圾填埋场的稳定性事关填埋场工程安全,为此,采用离心机试验和数值仿真模拟研究垂直扩容垃圾填埋场挡土土坝的稳定性.利用离心机试验检验陡峭垃圾挡坝在纯素填土材料填筑和加筋填土两种工况下的稳定性,验证其设计的合理性.通过与离心机试验获得的位移进行比对验证数值模型的可靠性,而后通过数值仿真扩展离心机试验结果,研究施工阶段和运营阶段,考虑加筋填土坝在施工运营阶段不同工况下的坝体安全系数和潜在滑移面的位置和形状,并对坝体填料渗透性、加固措施、坝体填料强度、筋材刚度和布置形式等影响因素进行对比分析.研究结果显示:对于垂直扩容垃圾挡坝扩容工程,加筋挡土坝的采用能有效提高由于场地限制的陡峭挡土坝的稳定性,使其达到设计要求. |
| 关键词: 垂直扩容挡坝 稳定性分析 滑动面 垃圾挡坝 离心机试验 数值仿真 |
| DOI：10.11918/201905067 |
| 分类号:U213.1 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51508203)；广东省水利科技创新项目(2015-17)；广州市2017年科学研究专项重点项目(201707020047) |
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| Centrifuge test and numerical simulation on stability of vertically extended earth dam in landfill project |
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ZHOU Xiaowen1,2,JIANG Haoran1,2,ZHOU Mi1,2,CHENG Li1,2,HAN Zejun1,2
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(1.State Key Laboratory of Subtropical Building Science(South China University of Technology), Guangzhou 510640, China; 2.South China Institute of Geotechnical Engineering, South China University of Technology, Guangzhou 510640, China)
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| Abstract: |
| The stability of a landfill is a key issue for the safety of the landfill project. Thus, centrifuge test and numerical simulation were carried out to investigate the stability of vertically extended earth dams in landfill projects. The stability of a steep extended earth dam with or without reinforced by geotextile was studied through centrifuge test, and the rationality of the design was verified. Before using the finite element (FE) method for parametric study, the FE model was validated by comparing with centrifuge test data in terms of soil displacement. Then, numerical simulations were conducted to extend the centrifuge test data during construction and operation stages. For extended earth dam reinforced by geotexile, the safety factor of the dam and the position and shape of potential slip surface were investigated under different working conditions during construction and operation stages. Effects of parameters such as permeability of fill soil, reinforced methods, shear strength of fill soil, stiffness and arrangement of reinforcement were analyzed and compared. Results show that for vertically extended earth dam projects, the stability of the steep dam reinforced by geotextile was effectively improved and not constrained by site conditions, which meets the demand of safety for design purpose. |
| Key words: vertically exteneded earth dam stability analysis potential slip surface landfill dam centrifuge test numerical simulation |
