Test and Analysis on Pore Water Pressure in Yangtze River Floodplain Foundation Reinforced by Vacuum Combined Surcharge Preloading

张崇旗; 丁建文; 万星; 赵轮; 贺智江

doi:10.13409/j.cnki.jdpme.2019.06.010

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Test and Analysis on Pore Water Pressure in Yangtze River Floodplain Foundation Reinforced by Vacuum Combined Surcharge Preloading

更新时间：2025-12-11

- Test and Analysis on Pore Water Pressure in Yangtze River Floodplain Foundation Reinforced by Vacuum Combined Surcharge Preloading
- Vol. 39, Issue 6, Pages: 954-960(2019)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2019.06.010
  CLC： U472.33
- Published：2019
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[1]张崇旗,丁建文,万星,赵轮,贺智江.真空联合堆载预压加固长江漫滩相软基孔压测试分析[J].防灾减灾工程学报,2019,39(06):954-960.

张崇旗, 丁建文, 万星, et al. Test and Analysis on Pore Water Pressure in Yangtze River Floodplain Foundation Reinforced by Vacuum Combined Surcharge Preloading[J]. 2019, 39(6): 954-960.
[1]张崇旗,丁建文,万星,赵轮,贺智江.真空联合堆载预压加固长江漫滩相软基孔压测试分析[J].防灾减灾工程学报,2019,39(06):954-960. DOI： 10.13409/j.cnki.jdpme.2019.06.010.

张崇旗, 丁建文, 万星, et al. Test and Analysis on Pore Water Pressure in Yangtze River Floodplain Foundation Reinforced by Vacuum Combined Surcharge Preloading[J]. 2019, 39(6): 954-960. DOI： 10.13409/j.cnki.jdpme.2019.06.010.

摘要

结合长江江苏镇江段某码头堆场地基采用真空联合堆载预压法加固处理工程

通过现场钻孔埋设孔隙水压力计

对长江漫滩相软土地基加固过程中孔隙水压力的发展变化过程进行了测试分析。结果表明:真空预压区

加固30d后地基中孔隙水压力变化基本稳定

且土中超静孔隙水压力的消散受该深度排水板中真空荷载的影响十分显著;排水板中真空荷载随深度衰减

衰减速率与排水板周围土层性质密切相关;通过现场测试得到排水板周围为长江漫滩相淤泥质粉质黏土时

真空荷载沿排水板深度衰减速率约为3kPa/m。

Abstract

A terminal storage yard along the Yangtze River was reinforced using vacuum combined surcharge preloading in Zhenjiang

Jiangsu

China.The pore water pressure was measured and analyzed during preloading by installing pore water pressure gauges in the Yangtze River floodplain foundation.The results show that the pore water pressure tends to be relatively stable after 30 days in the reinforced foundation treated by vacuum preloading.Meanwhile

the excess pore water pressure dissipation is significantly affected by the distribution of vacuum pressure along the depth of prefabricated vertical drains（PVDs）.The vacuum pressure in the PVDs decreases with the depth

and the decay rate is closely related to the properties of soil layer around PVDs.For the Yangtze River floodplain silty clay

the decay rate is about 3 kPa/m.

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references

基于改进孔压解析解对真空度衰减规律的分析 [J]. 刘志中,邓东升,丁建文,吉锋. 三峡大学学报(自然科学版) . 2015(04)

超软土真空预压室内模型试验研究 [J]. 孙立强,闫澍旺,李伟,吴坤标. 岩土力学 . 2011(04)

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真空排水预压工程中孔压实测资料的分析与应用 [J]. 岑仰润,龚晓南,温晓贵. 浙江大学学报(工学版) . 2003(01)

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淮河入江水道崇湾段堤防地基加固真空预压现场试验研究 [D]. 刘志中. 东南大学 2015

高含水率疏浚泥真空预压室内模型试验研究 [D]. 沈杰. 东南大学 2015

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