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

这项研究项目涉及使用振动板实时监测水下土壤压实的可能性。本研究的假设是，利用测得的振动板的振动特性，解耦土体骨架和孔隙流体的刚度分量，可以对海床土体的击实进行实时监测。这项研究将涉及参与意大利Chioggia附近的现场测试，以收集振动板和现场孔压数据。现场测试计划是由监督威尼斯泻湖恢复项目的岩土工作的小组进行的。随后的数据分析和振动板/土系统的建模将寻求从振动数据中提取土的刚度，探索在数据解释过程中孔隙流体和土骨架相的分离，评估超孔压对刚度测量的影响，并评估现场可能存在的摇摆模式的影响。如果成功，这些发现有望在近海填海造地和浪涌防护屏障建设过程中，在施工质量控制和便利方面取得很大进展。目前，实时水下压实监测是不可能的。这项基础研究将有可能使这项技术得以开发。这项研究将扩大我们的伙伴关系网络，特别是通过这一国际合作。研究结果将通过学术期刊和会议记录进行传播。这项研究奖将为PI和CSM的一名美国研究生提供重要的国际经验，并提供参与重大国际建设项目的机会。国际科学与工程办公室鼓励美国研究人员组成这样的国际合作，并共同资助这一奖项。

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.