SGER: Exploring Technique to Monitor Underwater Vibratory Soil Compaction for Venice Lagoon Restoration

这个研究项目涉及使用振动板实时监测水下土壤压实的潜力。本研究的假设是，利用测得的振动板振动特性，解耦土骨架和孔隙流体刚度分量，可以实时监测海底土体的压实情况。该研究将包括参与意大利基奥贾附近的现场测试，以收集振动板和现场孔隙水压力数据。现场测试项目由监督威尼斯泻湖修复项目岩土工程工作的小组进行。对振动板/土系统的后续数据分析和建模将寻求从振动数据中提取土壤刚度，探索数据解释过程中孔隙流体和土骨架相的分离，评估超孔隙水压力对刚度测量的影响，以及评估现场可能存在的摇摆模式的影响。如果成功，研究结果对近海土地复垦和浪涌防护屏障建设过程中的施工质量控制和权宜性具有相当大的前景。实时水下压实监测目前是不可能的。这项基础研究有可能使这项技术得到发展。这项研究将扩大我们的伙伴关系网络，特别是通过这种国际合作。研究结果将通过学术期刊和会议论文集传播。该研究奖将为项目负责人和CSM的一名美国研究生提供重要的国际经验，并有机会参与重大的国际建设项目。国际科学与工程办公室鼓励美国研究人员形成这样的国际合作，并共同资助该奖项。

This research project concerns the potential for real time monitoring of underwater soil compaction using a vibratory plate. The hypothesis for this research is that real time monitoring of seabed soil compaction can be performed by using the measured vibration characteristics of the vibratory plate and de-coupling the soil skeleton and pore fluid stiffness components. The research will involve participating in field testing near Chioggia, Italy to collect vibratory plate and in-situ pore water pressure data. The field testing program is being conducted by the group overseeing the geotechnical work for the Venice lagoon restoration project. Subsequent analysis of the data and modeling of the vibratory plate/soil system will seek to extract soil stiffness from the vibration data, explore the separation of the pore fluid and soil skeleton phases during interpretation of data, evaluate the influence of excess pore water pressure on stiffness measurement, and evaluate the influence of rocking modes that may exist in the field. If successful, the findings hold considerable promise for advancement in construction quality control and expediency during off-shore land reclamation and surge protection barrier construction. Real-time under-water compaction monitoring is not currently possible. This basic research would potential enable this technology to be developed. The research will broaden our network of partnerships particularly through this international collaboration. The results will be disseminated through scholarly journals and conference proceedings. This research award will provide the PI and an American graduate student from CSM with a significant international experience, and the opportunity to become involved in a major international construction project. The Office of International Science and Engineering encourages US investigators to form international collaborations such as this, and is co-funding this award.