Vacuum preloading method for land reclamation using hydraulic filled slurry from the sea: A case study in coastal China
Vacuum preloading method for land reclamation using hydraulic filled slurry from the sea: A case study in coastal China
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DOI：
10.1016/j.oceaneng.2018.01.063
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发表时间：
2018-03
影响因子：
5
通讯作者：
Wenlong Zhu;J. Yan;Guoliang Yu
中科院分区：
文献类型：
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作者：
Wenlong Zhu;J. Yan;Guoliang Yu
本研究以某工程为例，将真空预压法结合垂直排水系统，应用于海泥回填及原位软基填海工程。本文介绍了真空预压工程的场地条件、现场设备、施工工艺及部分要求。现场监测数据进行了介绍和分析。真空预压后，疏浚淤泥的平均固结度达到88%以上，承载力由原来的不足4kPa提高到50kPa以上。详细介绍了施工技术规范，可供工程技术人员参考。本文综述了三种估算地基最终沉降和固结度的经验预测方法。对公式中的几个关键参数进行了讨论，并给出了相应的最佳值。预测结果表明，Asaoka的方法是最好的预测疏浚海洋粘土泥浆的沉降与高初始含水量的真空预压改善。
This study observed an engineering project, in which the vacuum preloading method incorporated with the vertical drain system was applied to the improvement of the dredged marine clay slurry as the fill as well as the in-situ soft ground for land reclamation. The site conditions, field instrumentation, construction process and partial requirements of the vacuum preloading project are described in this paper. Field monitoring data is presented and analyzed. After the vacuum preloading, the average degree of consolidation achieved was more than 88%, and the bearing capacity of the dredged marine clay slurry was improved from less than 4 kPa to be higher than 50 kPa. Specifications of construction techniques were detailed which would be useful and referenceable to engineers. Three empirical prediction methods for estimating the ultimate settling and consolidation degree are reviewed. Several key parameters and their optimal values in the formulae are discussed and suggested, respectively. Prediction results show that the Asaoka's method is the most preferable for predicting the settling of dredged marine clay slurries with high initial water content improved by vacuum preloading.