考虑通水量影响的塑料排水板加固深度的理论研究

doi:10.13722/j.cnki.jrme.2015.0967

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摘要针对新近吹填土淤泥地基处理中加固深度小，土体强度增强有限等问题，提出理论分析加固深度的新思路，即以传统的负压下砂井固结方程的解析解为基础，通过迭代法计算出土体中任意一点的固结度，换算出土体的加固深度，从而分析研究塑料排水板的通水量变化对加固深度的影响，得出加固深度的变化规律。结果表明：在真空预压处理新近吹填土淤泥地基时，排水板的通水量对地基的加固深度有显著的影响；在一定的固结时间(90 d)内，排水板之间的土体会形成5～10 m的硬壳层，通过延长加固时间可以增加硬壳层的厚度；当通水量减小超过60%时，延长固结时间对改善加固深度作用不大。因此，设计和施工中应充分考虑排水板的通水量影响。

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	高会强1
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	莫海鸿1

关键词 ：地基基础, 地基处理, 加固深度, 通水量, 真空预压

Abstract：Its soil strength increases only a little and its effective depth is very small in the newly hydraulic reclamation silt foundation treatment. A new idea about analysis of reinforcement depth was proposed. The consolidation degree of soil at any point was calculated by iterative method base on the conventional consolidation equation for sand-drained ground under negative pressure，and the reinforced depth was deduced through the consolidation degree. The variation of reinforced depth was analyzed. The results show that：fill in the vacuum preloading of the newly hydraulic reclamation silt foundation，the water flux of plastic vertical drain(PVD) have a significant influence on the effective reinforced depth. Within a certain period of consolidation(90 days)，the hard soil layer between the PVDs will form 5–10 m. The thickness of hard soil will increase by extending consolidation time. When the water flux dropped 60%，the reinforced depth will little change with increasing consolidation time. Therefore，influence of PVDs water flux is considered in design and construction.

Key words： foundation foundation treatment reinforced depth water flux vacuum preloading

引用本文:

高会强1，2，莫海鸿1. 考虑通水量影响的塑料排水板加固深度的理论研究[J]. 岩石力学与工程学报, 2016, 35(S1): 3337-3342.
GAO Huiqiang1，2，MO Haihong1. Theoretical study of reinforced depth of plastic vertical drain considering the water flux. , 2016, 35(S1): 3337-3342.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2015.0967 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS1/3337

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[3]	王军，蔡袁强，符洪涛，等.新型防淤堵真空预压法室内与现场试验研究[J].岩石力学与工程学报，2014，33(6)：1257-1268.(WANG Jun，CAI Yuanqiang，FU Hongtao，et al. Indoor and field experiment on vacuum preloading with new anti-clogging measures[J].ChineseJournal of Rock Mechanics and Engineering，2014，33(6)：1257-1268.(in Chinese))
[4]	应舒，陈平山. 真空预压法中塑料排水板弯曲对固结的影响[J]. 岩石力学与工程学报，2011，30(增2)：3 633-3 640.(YINGShu，CHEN Pingshan. Effects of bended plastic drainage on consolidation caused by vacuumpreloading[J].Chinese Journal of Rock Mechanics and Engineering，2011，30(Supp.2)：3 633-3 640.(in Chinese))
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[6]	严蕴，房震，花剑岚. 真空堆载预压处理软基效果的室内试验研究[J]. 河海大学学报：自然科学版，2002，30(5)：118-121.(YAN Yun，FANG Zhen，HUA Jianlan.Experimental study on effect of treatment of soft foundationwith vacuum-surcharge preloading[J]. Journal of HohaiUniversity：Natural Science，2002，30(5)：118-121.(in Chinese))
[7]	彭劼. 真空-堆载联合预压法现场试验研究及机理探索[J]. 江苏科技大学学报：自然科学版，2006，20(1)：20-26.(PENG Jie. Field experiment and improvement principle ofvacuum combined surcharge preloading method[J]. Journal ofJiangsu University of Science and Technology：NaturalScience，2006，20(1)：20-26.(in Chinese))
[8]	李时亮. 真空预压加固软土地基作用机理分析[J]. 岩土力学，2008，29(2)：479-482.(LIShiliang. Analysis of action mechanism of treating soft foundation with vacuum preloading[J].Rock and Soil Mechanics，2008，29(2)：479-482.(in Chinese))
[9]	闫澍旺. 真空预压有效加固深度的探讨[J]. 水利学报，2007，38(7)： 774-778.(YAN Shuwang. Effective depth of vacuum preloading for reinforcing soft soil[J]. Journal ofHydraulic Engineering，2007，38(7)：774-778.(in Chinese))
[10]	ALI F H. The flow behavior of deformed prefabricated vertical drains[J]. Geotextiles and Geomembranes，1991，10(3)：235-248.
[11]	JEONG Y，LEE S. Flow capacity reduction of prefabricated vertical drain by kinking deformation[C]//Proceedings of the International Offshore and Polar Engineering Conference. [S. l.]：[s. n.]，2007：1315-1319.
[12]	孙立强，闫澍旺，李伟，等. 超软土真空预压室内模型试验研究[J].岩土力学，2011，32(4)：984-990.(SUN Liqiang，YAN Shuwang，LI Wei，et al. Study on super-soft soil vacuum preloading model test[J].Rock and Soil Mechanics，2011，32(4)：984-990.(in Chinese))
[13]	CHAI J C，MIURA N. Investigation of factors affecting vertical drain behavior[J]. Journal of Geotechnical and Geoenvironmental Engineering，1999，125(3)：216-226.
[14]	CHAI J C，MIURA N，NOMURA T. Effect of hydraulic radius on long-term drainage capacity ofgeosynthetics drains[J]. Geotextiles and Geomembranes，2004，22：3-16.
[15]	董志良. 堆载及真空预压砂井地基固结解析理论[J]. 水运工程，1992，(9)：1-7.(DONGZhiliang. Consolidation theory on heaped load and vacuum preloading of sand drain foundation[J].Waterway Engineering，1992，(9)：1-7.(in Chinese))
[16]	沈珠江，陆舜英. 软土地基真空排水预压的固结变形分析[J]. 岩土工程学报，1986，8(3)：7-15.(SHENZhujiang，LUShunying. Analysis on consolidation deformation of soft soil foundation under vacuum drainage preloading[J].Chinese Journal of Geotechnical Engineering，1986，8(3)：7-15.(in Chinese))
[17]	彭劼，刘汉龙，陈永辉，等. 真空-堆载联合预压法软基加固对周围环境的影响[J].岩土工程学报，2002，24(5)：656-659. (PENG Jie，LIU Hanlong，CHEN Yonghui，et al. Effects of combined vacuum surcharge preloading to surrounding environment[J]. Chinese Journal of Geotechnical Engineering，2002，24(5)：656-659.(in Chinese))
	[18]
[1]	董志良，张功新，周琦，等. 天津滨海新区吹填造陆超软土浅层加固技术研发及应用[J].岩石力学与工程学报，2011，30(5)：1073-1080.(DONG Zhiliang，ZHANG Gongxin，ZHOU Qi，et al. Research and application of improvement technology ofshallow ultra-soft soil formed by hydraulic reclamation inTianjin Binhai new area[J]. Chinese Journal of RockMechanics and Engineering，2011，30(5)：1073-1080.(in Chinese))
[2]	董志良，周琦，张功新，等. 天津滨海新区浅层超软土加固技术现场对比试验[J]. 岩土力学，2012，33(5)：1073-1080.(DONG Zhiliang，ZHOU Qi，ZHANG Gongxin，et al.Field comparison test of reinforcement technology ofshallow ultra-soft soil in Tianjin Binhai New Area[J].Rock and Soil Mechanics，2012，33(5)：1073-1080.(in Chinese))
[3]	王军，蔡袁强，符洪涛，等.新型防淤堵真空预压法室内与现场试验研究[J].岩石力学与工程学报，2014，33(6)：1257-1268.(WANG Jun，CAI Yuanqiang，FU Hongtao，et al. Indoor and field experiment on vacuum preloading with new anti-clogging measures[J].ChineseJournal of Rock Mechanics and Engineering，2014，33(6)：1257-1268.(in Chinese))
[4]	应舒，陈平山. 真空预压法中塑料排水板弯曲对固结的影响[J]. 岩石力学与工程学报，2011，30(增2)：3 633-3 640.(YINGShu，CHEN Pingshan. Effects of bended plastic drainage on consolidation caused by vacuumpreloading[J].Chinese Journal of Rock Mechanics and Engineering，2011，30(Supp.2)：3 633-3 640.(in Chinese))
[5]	李就好. 真空-堆载联合预压法处理在软基加固中的应用[J]. 岩土力学，1999，20(4)：58-62.(LI Jiuhao. Theapplication of vacuum-heaped load combiningpre-compression in the consolidation of soft clay[J]. Rockand Soil Mechanics，1999，20(4)：58-62.(in Chinese))
[6]	严蕴，房震，花剑岚. 真空堆载预压处理软基效果的室内试验研究[J]. 河海大学学报：自然科学版，2002，30(5)：118-121.(YAN Yun，FANG Zhen，HUA Jianlan.Experimental study on effect of treatment of soft foundationwith vacuum-surcharge preloading[J]. Journal of HohaiUniversity：Natural Science，2002，30(5)：118-121.(in Chinese))
[7]	彭劼. 真空-堆载联合预压法现场试验研究及机理探索[J]. 江苏科技大学学报：自然科学版，2006，20(1)：20-26.(PENG Jie. Field experiment and improvement principle ofvacuum combined surcharge preloading method[J]. Journal ofJiangsu University of Science and Technology：NaturalScience，2006，20(1)：20-26.(in Chinese))
[8]	李时亮. 真空预压加固软土地基作用机理分析[J]. 岩土力学，2008，29(2)：479-482.(LIShiliang. Analysis of action mechanism of treating soft foundation with vacuum preloading[J].Rock and Soil Mechanics，2008，29(2)：479-482.(in Chinese))
[9]	闫澍旺. 真空预压有效加固深度的探讨[J]. 水利学报，2007，38(7)： 774-778.(YAN Shuwang. Effective depth of vacuum preloading for reinforcing soft soil[J]. Journal ofHydraulic Engineering，2007，38(7)：774-778.(in Chinese))
[10]	ALI F H. The flow behavior of deformed prefabricated vertical drains[J]. Geotextiles and Geomembranes，1991，10(3)：235-248.
[11]	JEONG Y，LEE S. Flow capacity reduction of prefabricated vertical drain by kinking deformation[C]//Proceedings of the International Offshore and Polar Engineering Conference. [S. l.]：[s. n.]，2007：1315-1319.
[12]	孙立强，闫澍旺，李伟，等. 超软土真空预压室内模型试验研究[J].岩土力学，2011，32(4)：984-990.(SUN Liqiang，YAN Shuwang，LI Wei，et al. Study on super-soft soil vacuum preloading model test[J].Rock and Soil Mechanics，2011，32(4)：984-990.(in Chinese))
[13]	CHAI J C，MIURA N. Investigation of factors affecting vertical drain behavior[J]. Journal of Geotechnical and Geoenvironmental Engineering，1999，125(3)：216-226.
[14]	CHAI J C，MIURA N，NOMURA T. Effect of hydraulic radius on long-term drainage capacity ofgeosynthetics drains[J]. Geotextiles and Geomembranes，2004，22：3-16.
[15]	董志良. 堆载及真空预压砂井地基固结解析理论[J]. 水运工程，1992，(9)：1-7.(DONGZhiliang. Consolidation theory on heaped load and vacuum preloading of sand drain foundation[J].Waterway Engineering，1992，(9)：1-7.(in Chinese))
[16]	沈珠江，陆舜英. 软土地基真空排水预压的固结变形分析[J]. 岩土工程学报，1986，8(3)：7-15.(SHENZhujiang，LUShunying. Analysis on consolidation deformation of soft soil foundation under vacuum drainage preloading[J].Chinese Journal of Geotechnical Engineering，1986，8(3)：7-15.(in Chinese))
[17]	彭劼，刘汉龙，陈永辉，等. 真空-堆载联合预压法软基加固对周围环境的影响[J].岩土工程学报，2002，24(5)：656-659. (PENG Jie，LIU Hanlong，CHEN Yonghui，et al. Effects of combined vacuum surcharge preloading to surrounding environment[J]. Chinese Journal of Geotechnical Engineering，2002，24(5)：656-659.(in Chinese))
	[18]