增压式真空预压气体运移加固机制模型试验研究

doi:10.13722/j.cnki.jrme.2022.0142

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Abstract At present，the academic circles have different understanding of the gas migration path after gas injection operation and reinforcement mechanism of air-booster vacuum preloading. In view of this problem，several groups of air-booster vacuum preloading model experiments were designed to explore the gas migration path after gas injection operation and reinforcement mechanism of air-booster vacuum preloading. By comparing and analyzing the test results of drainage，pore water pressure，settlement，vane shear strength and water content，the following conclusions were obtained：in the process of treating ultra-soft soil by air-booster vacuum preloading，the gas moves to the soil surface first after gas injection. At the same time，by considering the real-time pore pressure change during gas injection operation，it is speculated that the main mechanism of gas injection operation to improve the drainage and consolidation effect of soil is as follows：during gas injection operation，the rise of pressurized gas will drive the deep pore water to migrate to the shallow layer，so that the deep pore water can be quickly absorbed and discharged by the drainage plate in the shallow layer，so as to improve the reinforcement effect of deep soil and the overall drainage efficiency.

Key words： soil mechanics vacuum preloading air-booster vacuum preloading gas migration reinforcement mechanism

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	Articles by authors
	LIU Jingjin1
	2
	LI Jiankai1
	LEI Huayang1
	2

Cite this article:

LIU Jingjin1,2,LI Jiankai1, et al. Model experimental study on gas migration and reinforcement mechanism of air-booster vacuum preloading#br#[J]. , 2023, 42(S1): 3598-3608.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0142 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS1/3598

[1]	杜东菊，杨爱武，刘举，等. 天津滨海吹填土[M]. 北京：科学出版社，2010：1-2.(DU Dongju，YANG Aiwu，LIU Ju，et al. Tianjin Binhai dredger fill[M]. Beijing：Science Press，2010：1-2.(in Chinese))
[2]	雷华阳，李宸元，刘景锦，等. 交替式真空预压法加固吹填超软土试验及数值模拟研究[J]. 岩石力学与工程学报，2019，38(10)： 2 112-2 125.(LEI Huayang，LI Chenyuan，LIU Jingjin，et al. Experimental study and numerical simulation of an alternating vacuum preloading method for strengthening hydraulic fill super soft soils[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(10)：2 112-2 125.(in Chinese))
[3]	鲍树峰，娄炎，董志良，等. 新近吹填淤泥地基真空固结失效原因分析及对策[J]. 岩土工程学报，2014，36(7)：1 350-1 359.(BAO Shufeng，LOU Yan，DONG Zhiliang，et al. Causes and countermeasures for vacuum consolidation failure of newly-dredged mud foundation[J]. Chinese Journal of Geotechnical Engineering，2014，36(7)：1 350- 1 359.(in Chinese))
[4]	刘景锦，雷华阳，卢海滨，等. 真空预压法淤堵泥层形成机理及预测模型研究[J]. 水文地质工程地质，2017，44(3)：61-71.(LIU Jingjin，LEI Huayang，LU Haibin，et al. A study of siltation mud formation mechanism and prediction model of vacuum preloading method[J]. Hydrogeology and Engineering Geology，2017，44(3)：61-71.(in Chinese))
[5]	王军，张乐，刘飞禹，等. 真空预压-电渗法联合加固软黏土地基试验研究[J]. 岩石力学与工程学报，2014，33(增2)：4 181-4 192.(WANG Jun，ZHANG Le，LIU Feiyu，et al. Experimental study of vacuum preloading combined reinforcement with electro-osmosis in soft clay ground[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：4 181-4 192.(in Chinese))
[6]	LEI H Y，XU Y G，LI X，et al. Effect of polyacrylamide on improvement of dredger fill with vacuum preloading method[J]. Journal of Materials in Civil Engineering，2019，31(9)：04019193.8
[7]	LIU J J，LEI H Y，ZHENG G，et al. Improved synchronous and alternate vacuum preloading method for newly dredged fills：laboratory model study[J]. International Journal of Geomechanics，2018，18(8)：04018086.1-04018086.16.
[8]	雷华阳，刘安仪，刘景锦，等. 超软土地基交替式真空预压法加固效果影响因素分析[J]. 岩石力学与工程学报，2022，41(2)：377-388.(LEI Huayang，LIU Anyi，LIU Jingjin，et al. Analysis of influence factors on reinforcement effect of alternate vacuum preloading method for ultra soft soil foundation[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(2)：377-388.(in Chinese))
[9]	雷华阳，王鹏，刘旭，等. 基于气体运移规律的增压式真空预压法加固机制分析[J]. 岩土力学，2021，42(4)：943-953.(LEI Huayang，WANG Peng，LIU Xu，et al. Influence of gas migration patterns on reinforcement of dredged slurry by air-booster vacuum preloading method[J]. Rock and Soil Mechanics，2021，42(4)：943-953.(in Chinese))
[10]	金亚伟. 软基处理工程中真空预压设备用接头[P]. 中国：CN202595724U，2012-12-12.(JIN Yawei. Joints for vacuum preloading equipment in soft foundation treatment engineering[P]. China：CN202595724U，2012-12-12.(in Chinese))
[11]	刘浩，余学鹏，崔俊杰，等. 增压防堵真空预压加固吹填土对比试验研究[J]. 铁道标准设计，2014，58(1)：28-33.(LIU Hao，YU Xuepeng，CUI Junjie，et al. Comparative experiment study on the strengthening of dredger fill using vacuum preloading method based on pressurization and anti-clogging technology[J]. Railway Standard Design，2014，58(1)：28-33.(in Chinese))
[12]	廖圣涛. 新型增压防堵真空预压地基处理试验研究[J]. 建筑施工，2015，37(6)：746-749.(LIAO Shengtao. Experimental study on new type foundation treatment by way of boosting pressure anti-blocking vacuum preloading[J]. Building Construction，2015，37(6)：746-749.(in Chinese))
[13]	LEI H Y，LIU X，WANG P，et al. Experimental investigation of influence of air-boost pressure and duration on air-boost vacuum preloading consolidation[J]. International Journal of Geomechanics，2021，21(6)：04021088
[14]	KE S W，WANG P，HU X Q，et al. Effect of the pressurized duration on improving dredged slurry with air booster vacuum preloading[J]. Marine Georesources and Geotechnology，2020， 38(8)：970-979.
[15]	ANDA R L，FU H T，WANG J，et al. Effects of pressurizing timing on air booster vacuum consolidation of dredged slurry[J]. Geotextiles and Geomembranes，2020，48(4)：491-503.
[16]	沈宇鹏，余江，刘辉，等. 增压式真空预压处理站场软基效果试验研究[J]. 铁道学报. 2011，33(5)：97-103.(SHEN Yupeng，YU Jiang，LIU Hui，et al. Experimental study on air-boosted vacuum preloading of soft station foundation[J]. Journal of the China Railway Society，2011，33(5)：97-103.(in Chinese))
[17]	CAI Y Q，XIE Z W，WANG J，et al. New approach of vacuum preloading with booster prefabricated vertical drains(PVDs) to improve deep marine clay strata[J]. Canadian Geotechnical Journal，2018，55(10)：1 359-1 371.
[18]	章定文，刘松玉，顾沉颖，等. 土体气压劈裂的室内模型试验[J]. 岩土工程学报，2009，31(12)：1 925-1 929.(ZHANG Dingwen，LIU Songyu，GU Chenying，et al. Model tests on pneumatic fracturing in soils[J]. Chinese Journal of Geotechnical Engineering，2009，31(12)：1 925-1 929.(in Chinese))
[19]	史吏，胡东东，蔡袁强，等. 增压式真空预压吹填淤泥孔压实时响应及加固机制初探[J]. 岩土力学，2020，41(1)：185-193.(SHI Li，HU Dongdong，CAI Yuanqiang，et al. Preliminary study of real-time pore water pressure response and reinforcement mechanism of air-booster vacuum preloading treated dredged slurry[J]. Rock and Soil Mechanics，2020，41(1)：185-193.(in Chinese))
[20]	林岩，李彪，诸葛爱军. 增压式真空预压在连云港软土地基处理中的应用[J]. 中国港湾建设，2016，36(11)：46-51.(LIN Yan，LI Biao，ZHUGE Aijun. Application of air-boosted vacuum preloading on soft soil foundation treatment in Lianyungang[J]. China Harbour Engineering，2016，36(11)：46-51.(in Chinese))
[21]	LEI H Y，HU Y，LIU J J，et al. Consolidation behavior of Tianjin dredged clay using two air-booster vacuum preloading methods[J]. Journal of Zhejiang University-Science A(Applied Physics and Engineering)，2021，22(2)：147-164.
[22]	姜彦彬，何宁，许滨华，等. 真空预压负压分布规律模型试验研究[J]. 岩土工程学报，2017，39(10)：1 874-1 883.(JIANG Yanbin，HE Ning，XU Binhua，et al. Model tests on negative pressure distribution in vacuum preloading[J]. Chinese Journal of Geotechnical Engineering，2017，39(10)：1 874-1 883.(in Chinese))
[23]	WANG J，CAI Y Q，MA J J，et al. Improved vacuum preloading method for consolidation of dredged clay-slurry fill[J]. Journal of Geotechnical and Geoenvironmental Engineering，2016，142(11)：06016012.