土工基础

›› 2016, Vol. 30 ›› Issue (2): 161-163.

• 工程实录 • 上一篇    下一篇

武汉某填埋场陈垃圾土承载特性研究

蒋善超，文松霖，任佳丽   

  1. （长江科学院 水利部岩土力学与工程重点实验室，武汉 430010）
  • 收稿日期:2015-03-31 出版日期:2016-04-20 发布日期:2016-04-27
  • 作者简介:蒋善超（1990-），男，硕士研究生，研究方向为地基原位测试与地基处理的研究。

Bearing Behavior of an Aged Municipal Landfill in Wuhan

JIANG Shanchao， WEN Songlin, REN Jiali   

  1. （Key Laboratory of Geotechnical Mechanics and Engineering of MWR, Yangtze River Scientific Research Institute, Wuhan 430010）
  • Received:2015-03-31 Online:2016-04-20 Published:2016-04-27

摘要： 卫生填埋场封场后的再利用已迫在眉睫，而陈垃圾土是一种非常特殊的土，变形机理复杂。通过现场载荷试验和数值模拟，分析探讨了陈垃圾土的变形特征及承载特性。研究结果表明，荷载较小时陈垃圾土压缩性较高，但随荷载增加纤维组分起到加筋作用，承载性能反而有所提高；陈垃圾土在荷载下的变形可分为四个阶段，应力应变关系可用两段Kondner建议的曲线拟合。

关键词: 陈垃圾土, 载荷试验, 数值模拟, 承载特性

Abstract: The reutilization of the capped and aged municipal landfills becomes more and more urgent due to the limited land resource. Due to its highly heterogeneous in nature, the aged municipal landfills is a special soil with high variable compressibility. The bearing capacity characterization of the aged municipal landfill soils was evaluated through the field plate loading tests as well as the numerical analysis. The results indicate that, when the loading level is low, a high compressibility was demonstrated. When the loading level is higher, the fibrous components in the landfill served as reinforcement, a lower compressibility could be obtained. The entire stress strain curve can be divided into four different stages and it can be fitted using the the curves suggested by Konder.

Key words: Aged Municipal Landfills, Field Plate Loading Tests, Numerical Simulation, Bearing Behavior