期刊
GEOTEXTILES AND GEOMEMBRANES
卷 49, 期 6, 页码 1495-1505出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.geotexmem.2021.06.003
关键词
Electro-osmotic consolidation; Vacuum preloading; Marine clay; Bearing capacity; Prefabricated electrokinetic system
资金
- Natural Science Foundation of Jiangsu Province [BK20200996]
- China Postdoctoral Science Foundation [2020M681566]
- National Natural Science Foundation of China [51978317]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [20KJB560033]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX19_1703]
- Excellent Scientific and Technological Innovation Team of Jiangsu Higher Education Institutions of China [2017-51]
Combining electro-osmotic consolidation with vacuum preloading (VP-I-ECM) on marine clay has shown to improve water discharge, settlement, shear strength, and bearing capacity, while also reducing anode erosion and energy consumption. This combined technique provides practical benefits for construction requirements and significantly enhances the performance of marine clay.
An electro-osmotic consolidation (EO) combined with vacuum preloading (VP) was investigated on marine clay using laboratory tests. To improve consolidation efficiency and reduce the settlement difference, a new prefabricated device was designed to combine EO and VP for the tests. The results indicated that the vacuum preloading with intermittent electro-osmotic consolidation (VP-I-ECM) provided more water discharge with higher discharge rate and produced larger soil settlement compared to traditional vacuum preloading and electro-osmotic consolidation. For the combined method, the VP effectively removed water from the soil for the first 12 h, and its efficiency decreased with the time. After 12 h, the intermittent EO was used to further consolidate the soil and maintain a high level of drainage rate. Test results also showed that the combined method of VP-I-ECM significantly improved the shear strength and bearing capacity of the marine clay to satisfy the construction requirements with a significant reduction in the anode erosion and the energy consumption. This research study provides useful information for the design guide and practical application of the combined technique for improving marine clay.
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