超软淤泥地基浅层二次真空预压效果试验研究 |
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引用本文: | 姜建芳,黄林根,姜梅玲.超软淤泥地基浅层二次真空预压效果试验研究[J].人民长江,2015,46(11):65-67. |
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作者姓名: | 姜建芳 黄林根 姜梅玲 |
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摘 要: | 针对吹填淤泥地基承载力几乎为零的特点,采用二次(一次无砂垫层,二次有砂垫层)真空预压法对大面积吹填淤泥进行处理。通过现场试验,分别对两次真空预压中的真空度、地基沉降等进行了观测。结果表明,对超软淤泥地基采用无砂垫层进行一次预压处理,能有效解决因地基承载力过低而无法施工的问题;进而采用有砂垫层的二次预压提高了真空压力的传递效果,可以进一步提高地基承载力。
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关 键 词: | 超软淤泥地基 真空预压 二次预压 现场试验 |
Experimental study on reinforcing effects of twice vacuum pre-loading of extreme-soft silt foundation |
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Abstract: | Aiming at the extremely low bearing capacity of hydraulic fill foundation, the twice vacuum pre-loading reinforcing method, firstly preloading cushion layer without sand and then preloading cushion layer containing sand, was adopted to strengthen the silt foundation. By in-situ test, the vacuum degree and foundation settlement in the two preloading process were measured. The results showed that the first preloading could effectively solve the problem of unable-to -construction caused by the extremely low foundation bearing capacity; the second preloading could improve transmission effect of vacuum pressure and further upgrade the foundation bearing capacity. |
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Keywords: | extremely soft silt vacuum preloading twice preloading in-situ test |
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