地质膜对长期负荷下垃圾填埋场稳定性的影响:界面剪切试验和数值模拟
Xiong Xia1,2, Ziqing Pan3, Hongyong Qiu2
1School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, China.
Environmental science and pollution research international
|March 21, 2024
概括
高密度聚乙烯 (HDPE) 地质膜为垃圾填埋场的传统粘土层提供了更稳定的替代品. 用HDPE地质膜取代粘土可以提高垃圾填埋场的稳定性,减少排放,提供更安全,更长期的解决方案.
科学领域:
- 地质技术工程 地质技术工程
- 环境工程 环境工程
- 材料科学 材料科学 材料科学
背景情况:
- 在垃圾填埋工程中,粘土是标准的,但在挖掘过程中会对环境造成破坏.
- 高密度聚乙烯 (HDPE) 地质膜正在被探索作为一种可持续的替代品.
- 了解地质膜在垃圾填埋场的长期性能至关重要.
研究的目的:
- 评估用HDPE地质膜取代粘土层的可行性.
- 研究城市固体废物 (MSW) 年龄对接口剪切强度的影响.
- 为了比较使用HDPE地质膜与粘土层的垃圾填埋场的长期稳定性.
主要方法:
- 在不同年龄的MSW样本和HDPE地质膜之间进行了实验室界面剪切测试.
- 使用有限元法 (FEM) 来模拟和比较垃圾填埋场的稳定性.
- 在不同的条件下分析了接口剪切强度和位移.
主要成果:
- MSW凝聚力最初增加,然后随着填埋年龄而减少;摩擦角度随着年龄的增长而增加.
- 更粗的地质膜表面显著提高了MSW的界面剪切强度.
- 地质膜的垃圾填埋场表现出不连续的滑动表面,延迟了滑动表面的透.
- 地质膜垃圾填埋场的最大排放量比粘土填埋场低10%.
- 总体稳定性安全系数与粘土相比,地质膜层垃圾填埋场的稳定性安全系数增加了18.5-30%.
结论:
- 与粘土层相比,HDPE地质膜提供了优越的长期稳定性和减少的位移.
- 地质膜表面的粗度是提高填埋场稳定的关键因素.
- 这项研究为垃圾填埋场设计和稳定性评估提供了宝贵的见解,促进了提高长期绩效.
更多相关视频
07:52Author Spotlight: Enhancing Small Animal Bone Compression Testing for Research
Published on: December 1, 2023
1.7K
10:28Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids
Published on: January 3, 2014
13.6K
相关概念视频
01:18Residual Stresses in Bending
167
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
167
01:21Plastic Behavior
196
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
196