侵蚀影响下水泥土的力学性质试验研究

›› 2014, Vol. 35 ›› Issue (12): 3377-3384.

侵蚀影响下水泥土的力学性质试验研究

刘泉声^{1, 2}，屈家旺¹，柳志平³，何军¹

1.武汉大学土木建筑工程学院，武汉 430072；2.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，武汉 430071； 3.中建三局投资发展公司，武汉 430060

收稿日期:2013-08-05 出版日期:2014-12-11 发布日期:2014-12-15
作者简介:刘泉声，男，1962年生，研究员，博士生导师，主要从事裂隙岩体温度–水力–应力耦合分析等方面的教学与研究工作。
基金资助:
国家重点基础研究发展计划(973)项目（No. 2014CB046904）；湖北省自然科学基金重点项目（创新群体）（No. 2011CDA119）。

Experimental study of mechanical properties of cemented soil under corrosion influence

LIU Quan-sheng^{1, 2}, QU Jia-wang¹, LIU Zhi-ping³, HE Jun¹

1. School of Civil and Architectureal Engineering, Wuhan University, Wuhan 430072，China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3. China Construction Third Engineering Bureau Investment and Development Company, Wuhan 430056, China

Received:2013-08-05 Online:2014-12-11 Published:2014-12-15

摘要/Abstract

摘要： 港珠澳大桥拱北隧道地处沿海地区，其地下水与海水相连，隧道基底采用粉体喷射搅拌法和高压喷射注浆法等方法进行加固，加固产生的水泥土在海水侵蚀性离子作用下其强度和稳定性会发生变化，从而对工程安全产生影响。根据上述两种施工工艺，制作内部含侵蚀物质和不含侵蚀物质的两种水泥土试块，配制多种不同浓度的单组分的化学溶液来模拟海水侵蚀环境，将制备的水泥土试块置于侵蚀溶液中进行预定时间的短时（≤28 d）浸泡，通过无侧限抗压试验、电镜扫描以及离子色谱测定，分别得到了单组分侵蚀溶液短时浸泡下水泥土试块无侧限抗压强度、微观结构随侵蚀溶液浓度和侵蚀时间的变化规律，以及侵蚀环境中离子浓度随侵蚀时间的变化规律。基于海水化学成分，配制多种不同浓度的双组分的化学溶液来模拟海水侵蚀环境，将制备的内部含侵蚀物质的淤泥质土水泥土试块置于侵蚀溶液中进行预定时间的长时（≥90 d）浸泡，通过无侧限抗压试验得到了双组分侵蚀溶液长时浸泡下水泥土试块无侧限抗压强度变化规律。试验结果可为临时性及长期性水泥土工程的设计及安全维护提供一定参考依据。

关键词: 水泥土, 侵蚀, 无侧限抗压强度, 电镜扫描, 离子浓度, 龄期

Abstract: Hong Kong-Zhuhai-Macao Bridge Gongbei tunnel is located in coastal areas. Its groundwater is connected to the seawater, foundation pit bottom of Gongbei tunnel is reinforced by dry jet mixing method and high pressure jet grouting method. Under the action of corrosive ions in seawater, strength and stability of cemented soil produced by reinforcement would get changed; thus impact on engineering safety. According to difference between the two kinds of construction technology，two kinds of cemented soil test blocks which contain or not contain corrosive substance were made, one-component chemical solutions of different concentrations were prepared to model water erosion environment, then the prepared cemented soil test samples were put into the corrosive solution to soak for scheduled short period (≤28 d). By unconfined compression test, SEM and ion chromatography test, change laws of microstructure and unconfined compression strength of cemented soil test samples with corrosion time and solution concentration after short period soaking in one-component erosion solution; change law of ion concentration in corrosion solution with corrosion time was obtained respectively. Based on chemical component of brine, two-component chemical solutions of different concentrations were prepared to model water erosion environment; then the prepared containing corrosive substances mucky cemented soil test samples were put into the corrosive solutions to soak for scheduled long period(≥90 d). By unconfined compression test, change laws of unconfined compression strength of cemented soil test samples with corrosion time and solution concentration after long period soaking in two-component erosion solutions were obtained. These offer reference frame for temporary and long-lasting cemented soil engineering design and safety maintenance.

Key words: cemented soil, corrosion, unconfined compression strength, SEM, ion concentration, age

中图分类号:

TU 432

刘泉声，屈家旺，柳志平，何军,. 侵蚀影响下水泥土的力学性质试验研究[J]. , 2014, 35(12): 3377-3384.

LIU Quan-sheng , QU Jia-wang , LIU Zhi-ping , HE Jun,. Experimental study of mechanical properties of cemented soil under corrosion influence[J]. , 2014, 35(12): 3377-3384.

参考文献

相关文章 15

[1]	刘成禹, 陈博文, 罗洪林, 阮家椿, . 满流条件下管道破损诱发渗流侵蚀的试验研究[J]. 岩土力学, 2020, 41(1): 1-10.
[2]	高运昌, 高盟, 尹诗, . 聚氨酯固化海砂的静力特性试验研究[J]. 岩土力学, 2019, 40(S1): 231-236.
[3]	雷华阳, 胡垚, 雷尚华, 祁子洋, 许英刚, . 增压式真空预压加固吹填超软土微观结构特征分析[J]. 岩土力学, 2019, 40(S1): 32-40.
[4]	王冲, 胡大伟, 任金明, 周辉, 卢景景, 刘传新, . 侵蚀性环境对地下结构渗透和力学特性影响研究[J]. 岩土力学, 2019, 40(9): 3457-3464.
[5]	沈泰宇, 汪时机, 薛乐, 李贤, 何丙辉, . 微生物沉积碳酸钙固化砂质黏性紫色土试验研究[J]. 岩土力学, 2019, 40(8): 3115-3124.
[6]	吴凤元, 樊赟赟, 陈剑平, 李军, . 基于不同侵蚀模型的高速崩滑碎屑流动力过程模拟分析[J]. 岩土力学, 2019, 40(8): 3236-3246.
[7]	周辉, 郑俊, 胡大伟, 张传庆, 卢景景, 高阳, 张旺, . 碳酸性水环境下隧洞衬砌结构劣化机制研究[J]. 岩土力学, 2019, 40(7): 2469-2477.
[8]	江强强, 刘路路, 焦玉勇, 王浩, . 干湿循环下滑带土强度特性与微观结构试验研究[J]. 岩土力学, 2019, 40(3): 1005-1012.
[9]	查甫生, 刘晶晶, 许龙, 邓永锋, 杨成斌, 储诚富, . 水泥−粉煤灰固化/稳定重金属污染土的电阻率特性试验研究[J]. 岩土力学, 2019, 40(12): 4573-4580.
[10]	吕擎峰, 周刚, 王生新, 霍振升, 马博, . 固化盐渍土核磁共振微观特征[J]. 岩土力学, 2019, 40(1): 245-249.
[11]	陈军, 梁文鹏, 应宏伟, . 大直径水泥土锚索合理间距的试验与数值研究[J]. 岩土力学, 2018, 39(S2): 374-380.
[12]	魏晓明, 郭利杰, 李长洪, 张立新, 罗文冲, 刘仁, . 高阶段胶结充填体强度空间变化规律研究[J]. 岩土力学, 2018, 39(S2): 45-52.
[13]	陈瑞锋，田高源，米栋云，董晓强,. 赤泥改性黄土的基本工程性质研究[J]. , 2018, 39(S1): 89-97.
[14]	冯上鑫，柴军瑞，许增光，覃源，陈玺. 基于核磁共振技术研究渗流作用下土石混体细观结构的变化[J]. , 2018, 39(8): 2886-2894.
[15]	张亭亭，王平，李江山，万勇，薛强，王士权, . 养护龄期和铅含量对磷酸镁水泥固化/稳定化铅污染土的固稳性能影响规律及微观机制[J]. , 2018, 39(6): 2115-2123.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed