Anti-permeability of soil-cement mixing piles under coral reef geological conditions
-
摘要: 为研究珊瑚礁特殊地质条件下水泥土搅拌桩的抗渗性能,以海南岛某基坑止水工程为背景,通过原状土室内渗透试验与现场取芯试验,获得了膨润土外加剂水泥土的抗渗变化规律。研究表明:①水泥土搅拌桩在珊瑚礁特殊地质条件下的止水工程中具有良好的适用性。②早期水泥对水泥土渗透性的影响大于膨润土,后期由于膨润土的密实效应,膨润土对渗透性能的影响大于水泥,且随着膨润土掺入量的增加,水泥土渗透系数逐渐减小,抗渗能力增强。研究成果对珊瑚礁地质中工程止水具有一定的借鉴意义。Abstract: To study the anti-permeability of soil-cement mixing piles under special coral reef geological conditions, taking a certain foundation pit water project of Hainan Island as the background, through the penetration tests on undisturbed soils and in-situ core tests, the impermeability variation laws of bentonite cement admixtures are obtained. The results show that: (1) the soil-cement mixing piles have good applicability in waterproofing engineering under coral reef geological conditions; (2) at the early stage, the influence of cement on soil-cement permeability is greater than that of bentonite, and at later stage due to the compact effect of bentonite, the influence of bentonite on soil-cement permeability is greater than that of the cement, and with the increasing quantity of bentonite, permeability coefficient of soil-cement decreases, and anti-permeability increases gradually. It has a certain referential meaning to waterproofing engineering under coral reef geological conditions.
-
Keywords:
- coral reef geology /
- soil-cement mixing pile /
- bentonite /
- penetration test /
- anti-permeability
-
[1] OLSEN W H. An investigation into the near-surface structure of coral reefs using dynamic penetration techniques[M]. Townsvills: Thesis James Cook University, 1980. [2] POULOS H G, VESUGI Mand, YOUNG G S. Strength and deormation properties of bass strait carbonate sands[J]. Geot Eng, 1982, 13(2): 189-211. [3] TAKASHI Tsuchida, MASAKI Kobayashi. Engineering properties of coral soils in Japanese southwestern islands[C]// International Conference on Calcareous Sediments. Perth, 1988. [4] 刘崇权, 汪稔. 钙质砂物理力学性质初探[J]. 岩土力学, 1998, 19(1): 32-37. (LIU Cong-quan, WANG Ren. Preliminary research on physical and mechanical properties of calcareous sand[J]. Rock and Soil Mechanics, 1998, 19(1): 32-37. (in Chinese)) [5] 吴京平, 褚瑶, 楼志刚. 颗粒破碎对钙质砂变形及强度特性的影响[J]. 岩土工程学报, 1997, 19(5): 49-55. (WU Jing-ping, CHU Yao, LOU Zhi-gang. Influence of particle breakage on deformation and strength properties of calcareous sands[J]. Chinese Jounal of Geotechnical Engineering, 1997, 19(5): 49-55. (in Chinese)) [6] JAZDANIAN A D, REDDY K R, GONZALEZ J V, et al. Evaluation of different slurry materials for containment wall construction at a dense nonaqueous phase liquid- contaminated site[J]. Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management, 2004, 8(3): 173-180. [7] JEFFERIS S A. Bentonite-cement slurries for hydraulic cut-offs[C]// Proc 10th Int Conf International Society for Soil Mechanics and Foundation Engineering. Stockholm, 1981. [8] OPDYKE SHANA M, EVANS JEFFREY C. Slag-cement- bentonite slurry walls[J]. Journal of Geotechnical and Geoenviron-Mental Engineering, 2005, 131(6): 673-681. [9] KHERA RAJ P. Calcium bentonite, cement, slag, and fly ash as slurry wall materials[J].Geotechnical Special Publication, 1995, 46(2): 1237-1249. [10] PHILIP L K. An investigation into contaminant transport processes through single-phase cement-bentonite slurry walls[J]. Engineering Geology, 2001, 60(1): 209-221. -
期刊类型引用(7)
1. 许增光,李煜婷,曹成. 岩土体介质非达西渗流特性研究进展. 应用力学学报. 2024(06): 1211-1236 . 百度学术
2. 谈家诚,沈振中,张宏伟,徐力群,李国辉. 考虑黏土–结构接触变形的剪切–渗流耦合试验. 岩土工程学报. 2022(09): 1679-1688 . 本站查看
3. 邓刚,张茵琪,张延亿,湛正刚,杨家修,卢吉,曹学兴. 压实宽级配黏土与刚性面结合带抗渗特性研究. 岩土工程学报. 2021(09): 1631-1639 . 本站查看
4. 刘千惠,王翔南,湛正刚,于玉贞,吕禾. 黏性土-结构接触面剪切变形时的渗透机理分析. 水力发电学报. 2021(09): 113-121 . 百度学术
5. 张茵琪,邓刚,张延亿,卢吉,曹学兴. 宽级配黏土与混凝土结合带渗透特性试验研究. 水利水电技术(中英文). 2021(10): 182-190 . 百度学术
6. 王刚,韦林邑,魏星,张建民. 压实黏土三轴压缩变形过程中的渗透性变化规律. 岩土力学. 2020(01): 32-38 . 百度学术
7. 王刚,韦林邑,魏星,张建民. 高土石坝心墙水力破坏机制研究进展. 水利水电技术. 2019(08): 58-65 . 百度学术
其他类型引用(8)
计量
- 文章访问数:
- HTML全文浏览量: 0
- PDF下载量:
- 被引次数: 15