南京大学学报(自然科学版) ›› 2018, Vol. 54 ›› Issue (6): 10951104.doi: 10.13232/j.cnki.jnju.2018.06.005
汪 勇,刘 瑾*,宋泽卓,白玉霞,王琼亚,祁长青,孙少锐
Wang Yong,Liu Jin*,Song Zezhuo,Bai Yuxia,Wang Qiongya,Qi Changqing,Sun Shaorui
摘要: 对河道岸坡坡面稳定性问题,采用聚氨酯型生态稳定剂对边坡表层砂土进行改良,通过室内试验对改良砂土强度特性、水稳定性与抗冲刷能力进行研究,并结合扫描电镜对稳定剂改良砂土的机理进行了深入分析. 试验结果表明:稳定剂浓度与砂土干密度对改良砂土强度特性、水稳定性与抗冲刷能力有显著影响. ①随着稳定剂浓度的增加,改良砂土的强度特性,水稳定性与抗冲刷能力逐渐增强,特别是对于砂土抗拉强度与水稳定性能的改善. ②随干密度增加,改良砂土的峰值强度与残余强度、剪切强度以及水稳定性能增强;而改良砂土的抗拉强度在1.5 g·cm-3时最大,1.4 g·cm-3的次之,1.6 g·cm-3的最小. ③稳定剂溶液与水反应生成的固化膜缠绕包裹砂粒,填充砂土空隙,在砂土中形成一种稳定的结构,很好地增强了砂粒间的粘结力,减小砂土空隙,进而改良砂土的工程性质.
中图分类号:
[1] 常 宏,金维群,王世昌等. 清江中下游岸坡稳定性对河流地貌过程的响应. 工程地质学报,2011,19(5):756-763.(Chang H,Jin W Q,Wang S C,et al. Slope stability response to riever geomorphic process in middle and lower reaches of QingJiang river. Journal of Engineering Geology,2011,19(5):756-763.) [2] 邓珊珊,夏军强,李 洁等. 河道内水位变化对上荆江河段岸坡稳定性影响分析. 水利学报,2015,46(7):844-852.(Deng S S,Xia J Q,Li J,et al. Influence of the variation of in-channel water levels on the riverbank stability in the Upper Jingjiang Reach. Journal of Hydraulic Engineering,2015,46(7):844-852.) [3] 祁生文,伍法权,常中华等. 三峡地区奉节县城缓倾层状岸坡变形破坏模式及成因机制. 岩土工程学报,2006,28(1):88-91.(Qi S W,Wu F Q,Chang Z H,et al. Mechanism and model for deformation of bank slope with slightly inclined soil layers in Fengjie County of Three Gorges. Chinese Journal of Geotechnical Engineering,2006,28(1):88-91.) [4] 廖小永,罗恒凯. 淤泥质岸坡破坏模式及治理实践. 人民长江,2008,39(13):72-74.(Liao X Y,Luo H K. Damage pattern and control practice of silt bank slope. Yangtze River,2008,39(13):72-74) [5] 吕正权. 堤防加固中的抛石护脚施工. 人民长江,2003,34(9):44-45.(Lü Z Q. On rock dump construction for dike protection. Yangtze River,2003,34(9):44-45.) [6] 祝介旺,庄华泽,李建伟等. 大型边坡加固技术的研究. 工程地质学报,2008,16(3):365-370.(Zhu J W,Zhuang H Z,Li J W,et al. Research on reinforcement technique of slop with large dimensions. Journal of Engineering Geology,2008,16(3):365-370.) [7] 刘 瑾,张 达,汪 勇等. 高分子稳定剂生态护坡机理及其应用. 地球科学与环境学报,2016,38(3):420-426.(Liu J,Zhang D,Wang Y,et al. Reinforcement mechanism of soil slope surface with polymer soil stabilizer and its application. Journal of Earth Sciences and Environment,2016,38(3):420-426.) [8] 朱海生,陈 健,张桂荣等. 生态袋挡墙护岸结构设计及其力学性能变化. 水利水运工程学报,2015(4):48-55.(Zhu H S,Chen J,Zhang G R,et al. Structural design of retaining wall with ecological geo-textile bags and its changes in mechanical properties. Hydro-Science and Engineering,2015(4):48-55.) [9] 关春曼,张桂荣,赵 波等. 城市河流生态修复研究进展与护岸新技术. 人民黄河,2014,36(10):77-80.(Guan C M,Zhang G R,Zhao B,et al. Advances on ecological restoration of urban river in china and new technologies of bank revetment. Yellow River,2014,36(10):77-80.) [10] Rezaeimalek S,Huang J,Bin-Shafique S. Evaluation of curing method and mix design of a moisture activated polymer for sand stabilization,Construction and Building Materials,2017,146:201-220. [11] Ate A. The effect of polymer-cement stabilization on the unconfined compressive strength of liquefiable soils. International Journal of Polymer Science,2013:356214. [12] Marto A,Latifi N,Eisazadeh A. Effect of non-traditional additives on engineering and microstructural characteristics of laterite soil. Arabian Journal for Science and Engineering,2014,39(10):6949-6958. [13] Hong S H,Lee E Y. Restoration of eroded coastal sand dunes using plant and soil-conditioner mixture. International Biodeteriora-tion and Biodegradation,2016,113:161-168. [14] Yang J,Wang F,Fang L,et al. The effects of aging tests on a novel chemical sand-fixing agent-Polyaspartic acid. Composites Science and Technology,2007,67(10):2160-2164. [15] 董金梅,王 沛,柴寿喜. 水泥-改性聚乙烯醇固化轻质土的强度特性. 建筑材料学报,2011,14(4):576-580.(Dong J M,Wang P,Chai S X. Strength characteristics of lightweight soil amended by cement-modified poly(vinyl alcohol). Journal of Building Materials,2011,14(4):576-580.) [16] 吴淑芳,吴普特,冯 浩. 坡面喷施高分子化合物集流效率的试验研究. 水土保持学报,2005,19(1):10-13,17.(Wu S F,Wu P T,Feng H. Experimental study of macromolecule polymers on Increasing efficiency of rainwater catchment on sloping field. Journal of Soil and Water Conservation,2005,19(1):10-13,17.) [17] 施 斌,刘 瑾,黄 河等. STW型生态土壤稳定剂研发与基本性能. 工程地质学报,2008,16(Sl):262-266. [18] 刘 瑾,施 斌,黄 河等. STW型生态土壤稳定剂改良工程粘性土胀缩性试验研究. 工程地质学报,2008,16(6):820-825.(Liu J,Shi B,Huang H,et al. Experimental study on swelling and shrinking property of clay treated with STW polymer soil stabilizer. Journal of Engineering Geology,2008,16(6):820-825.) [19] Liu J,Shi B,Jiang H T,et al. Research on the stabilization treatment of clay slope topsoil by organic polymer soil stabilizer. Engineering Geology,2011,117(1-2):114-120. [20] 王银梅,孙冠平,谌文武等. SH固沙剂固化沙体的强度特征. 岩石力学与工程学报,2003,22(s2):2883-2887.(Wang Y M,Sun G P,Chen W W,et al. Strength characteristics of sand fixated by SH. Chinese Journal of Rock Mechanics and Engineering,2003,22(s2):2883-2887.) [21] 王银梅,韩文峰,谌文武. 新型高分子材料固沙抗冻性能试验研究. 中国地质灾害与防治学报,2006,17(4):145-148.(Wang Y M,Han W F,Chen W W. Experimental study on the freezing-thawing resistance of sand fixation with a new polymer material. The Chinese Journal of Geological Hazard and Control,2006,17(4):145-148.) |
No related articles found! |
|