增压式真空预压法加固海相吹填土现场试验研究 |
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引用本文: | 胡建斌,潘曼,李维安,王伟刚,彭劼. 增压式真空预压法加固海相吹填土现场试验研究[J]. 科学技术与工程, 2018, 18(9) |
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作者姓名: | 胡建斌 潘曼 李维安 王伟刚 彭劼 |
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作者单位: | 河海大学岩土力学与堤坝工程教育部重点实验室,河海大学岩土力学与堤坝工程教育部重点实验室,宁波市政工程建设集团股份有限公司,宁波市政工程建设集团股份有限公司,河海大学岩土力学与堤坝工程教育部重点实验室,河海大学岩土工程科学研究所 |
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基金项目: | (51578214)资助 |
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摘 要: | 为进一步推动真空预压法在海相吹填土地基中的应用,克服其自身的局限性,探讨增压在真空预压法中所起到的作用,依托温州某吹填工程开展现场试验研究,包括增压式真空预压法和常规真空预压法的现场对比试验,对现场的膜下真空度、表层沉降进行了分析,重点研究加固后增压式真空预压处理后的地基承载力的变化规律和加固效果,并与常规真空预压法进行对比。结果表明显:增压式真空预法加固效果明显,土体深层次承载力有一定程度提高,尤其在吹填面以下1.5~3 m的范围内增压区比常规真空预压区土体强度高。
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关 键 词: | 海相吹填土地基 真空预压法 增压 现场试验 地基承载力 |
收稿时间: | 2017-06-21 |
修稿时间: | 2017-11-21 |
Field tests on marine dredger fill foundation by air-boosted vacuum preloading |
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Affiliation: | Hohai University Mechanics and Geotechnical Engineering of Ministry of Education Key Laboratory of dam,Hohai University Mechanics and Geotechnical Engineering of Ministry of Education Key Laboratory of dam,Ningbo Municipal Engineering Construction Group Co., Ltd,Ningbo Municipal Engineering Construction Group Co., Ltd, |
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Abstract: | In order to increase the application of vacuum preloading in large dredger fill foundation, overcome its own limitations, and to explore the role of air-boost in vacuum preloading, field tests on improvement technology were performed based on a soft foundation filled in Wenzhou including field comparison tests of air-boosted vacuum preloading and conventional vacuum preloading. The vacuum pressure and surface settlement are analyzed and the changes of bearing capacity of reinforced foundation after air-boosted vacuum preloading and the reinforcement effect are studied mainly, which were compared with conventional vacuum preloading method. The results show that the reinforcement effect of air-boosted vacuum preloading is obvious, and the deep bearing capacity of soil is improved to some extent, especially in the range of 1.5m ~ 3m below the blowing surface. |
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Keywords: | dredger fill foundation vacuum preloading air-boost field tests bearing capacity |
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