| 排水粉喷桩加固软土地基桩周土体强度变化规律 |
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| 引用本文： | 杜广印,刘松玉.排水粉喷桩加固软土地基桩周土体强度变化规律[J].水文地质工程地质,2010,37(3):87-91. |
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| 作者姓名： | 杜广印 刘松玉 |
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| 作者单位： | 成都理工大学环境与土木工程学院;东南大学岩土工程研究所; |
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| 摘 要： | 排水粉喷桩(2D工法)是同时采用粉喷桩和塑料排水板加固软土地基的一种新工法。在某高速公路中进行了排水粉喷桩加固软土地基的现场试验段施工,分别采用静力触探试验、十字板剪切试验等方法测定加固前及其加固后不同龄期的粉喷桩桩周土强度,得到了施工后桩间土强度变化的规律。测试结果表明采用粉喷桩联合排水板法加固后,桩周土强度有一个先降低后提高的过程,28天龄期时恢复到原状土强度,随着龄期的增长桩周土强度可以进一步增加。最后对桩周土强度的变化机理进行了初步探讨。
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| 关 键 词： | 排水粉喷桩法 桩周土 强度 静力触探 十字板强度 |
Strength change feature of surrounding soil in the vicinity of DJM columns in ground improved by DJM-PVD combined method |
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| DE Guang-yin,LIU Song-yu.Strength change feature of surrounding soil in the vicinity of DJM columns in ground improved by DJM-PVD combined method[J].Hydrogeology and Engineering Geology,2010,37(3):87-91. |
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| Authors: | DE Guang-yin LIU Song-yu |
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| Institution: | 1. Environment and Civil Engineering College,Chengdu University of Technology,Chengdu 610059,China; 2. Institute of Geotechnical Engineering,Southeast University,Nanjing 210096,China |
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| Abstract: | A remarkable combined method of the dry jet mixing with prefabricated vertical drains (DJM-PVD combined method) is innovated and successfully practiced in a highway project on very soft clay in Jiangsu Province,China. The strength change feature of surrounding soil in the vicinity of a DJM column is investigated. The field results of cone penetration and vane shear tests indicated that the strength of surrounding soil decreases in a short period after the installation of DJM due to the destruction of soil. ... |
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| Keywords: | DJM-PVD combined method surrounding soil strength cone penetration testing vane shear testing |
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