NEESR: Induced Partial Saturation (LPS) Through Transport and Reactivity for Liquefaction Mitigation

NEESR：通过传输和反应性诱导部分饱和（LPS）以缓解液化

• 批准号: 1134940
• 负责人: M. K. Yegian
• 金额: $ 119.75万
• 依托单位: Northeastern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-10-01 至 2014-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1134940&HistoricalAwards=false
• 关键词: NEESR; Induced; Partial; Saturation; LPS

Devastating effects of ground failure, due to liquefaction of water saturated sands, on the built environment has been widely observed during most moderate to large size earthquakes. There is an urgent need to develop a cost effective liquefaction prevention method that can be applied to new sites as well as sites with existing structures. Researchers at Northeastern University, the University of Texas at Austin, Boise State University, the University of California at Santa Barbara, the University at Buffalo and the USGS will collaborate to develop an innovative and practical field technique for liquefaction mitigation by inducing partial saturation (IPS) in otherwise fully saturated liquefiable sands. The goals of this research are twofold: 1) to conduct fundamental research exploring the feasibility of inducing partial saturation under field conditions, by injecting very low concentration of sodium percarbonate solution, and through transport and reactivity slowly generate oxygen gas bubbles in sands; and, 2) to demonstrate the effectiveness of IPS in preventing the occurrence of liquefaction. The research will take advantage of unique experimental and field facilities of NSF's Network for Earthquake Engineering Simulation (NEES) to acquire fundamental knowledge on the behavior of partially saturated sands and to develop enabling technologies to verify the effectiveness of IPS as a liquefaction prevention method. The research program will achieve its goal by integrating small- and large-scale laboratory investigations, field tests and numerical simulation. NEES facilities to be utilized are the 1-g laminar box at NEES@Buffalo, the T-Rex shaker at NEES@Utexas and the wildlife field site at NEES@UCSB. Data from this project will be archived and made available to the public through the NEES Project Warehouse/data repository. The outcome of this research will have world-wide impact on human safety and protection of property from earthquake hazards. Also, this research will enhance oxygen delivery systems used in bioremediation of contaminated ground. The research is a collaboration between faculty and students in the fields of earthquake and geoenvironmental engineering. Such collaborations will benefit undergraduate and graduate students in science and engineering and promote interdisciplinary education and research. Educational tools using the research facility will be developed to heighten the public's awareness of earthquake risk and promote interest in science and engineering to underrepresented communities. This award is part of the National Earthquake Hazards Reduction Program (NEHRP).

在大多数中度至大尺寸的地震期间，由于水饱和的沙子的液化而引起的地面故障的毁灭性影响。 迫切需要开发一种具有成本效益的预防液化方法，该方法可以应用于新站点以及具有现有结构的站点。 东北大学，德克萨斯大学奥斯汀分校，博伊西州立大学，加利福尼亚大学圣塔芭芭拉分校，布法罗大学和USGS的研究人员将合作，通过诱导完全饱和的液化液化液，以诱导部分饱和的液化（IPS）来开发一种创新且实用的现场技术。 这项研究的目标是双重的：1）进行基础研究，探索在田间条件下诱导部分饱和，通过注入非常低浓度的过碳酸钠溶液以及通过运输和反应性来诱导部分饱和的可行性；以及2）证明IPS在防止液化发生方​​面的有效性。 该研究将利用NSF网络的地震工程模拟网络（NEE）的独特实验和现场设施，以获取有关部分饱和砂的行为的基本知识，并开发有能力的技术来验证IPS作为预防液化方法的有效性。 该研究计划将通过整合小规模实验室研究，现场测试和数值模拟来实现其目标。 NEES的NEES设施是NEES@Buffalo的1-G层状盒，Nees@Utexas的T-Rex振动板和NEES@UCSB的野生动物田地。 该项目的数据将通过NEES Project仓库/数据存储库归档并提供给公众。 这项研究的结果将对人类安全和保护财产免受地震危害的保护产生影响。 此外，这项研究将增强用于污染地面生物修复的氧递送系统。 这项研究是地震和地球环境工程领域的教师与学生之间的合作。 这种合作将使科学和工程学的本科生和研究生受益，并促进跨学科的教育和研究。 将开发使用研究机构的教育工具，以提高公众对地震风险的认识，并促进对代表性不足社区的科学和工程的兴趣。 该奖项是国家地震危害计划（NEHRP）的一部分。