冻融循环下糯米浆对石灰土抗剪强度的影响

摘要/Abstract

摘要： 在季节性冻土地区修建道路工程时,不仅要对土壤进行力学改性还需要保护脆弱的生态环境。本文研究了冻融循环条件下,糯米浆对石灰土抗剪强度的影响。在石灰土(石灰质量浓度为10%)中加入不同质量浓度(0%、2%、4%、6%、8%)的糯米浆,研究不同冻融循环次数(0次、1次、3次、6次、10次)下糯米浆改良土的应力应变曲线特征以及抗剪强度、黏聚力和内摩擦角的变化特征。结果表明,在石灰土中加入糯米浆可以提高改良土的抗剪强度,但糯米浆浓度过高反而导致抗剪强度降低,糯米浆浓度为6%时改良土的抗剪强度较大。冻融循环会导致改良土的抗剪强度下降,糯米浆可以降低改良土在冻融循环下的强度损失。冻融循环作用下,改良土黏聚力和内摩擦角的变化趋势不同。该结果为糯米浆改性季节性冻土地区路基土提供了参考。

关键词: 季节性冻土, 糯米浆, 石灰, 冻融循环, 直剪试验, 抗剪强度

Abstract: The construction of road projects in seasonal frozen soil areas needs to protect the fragile ecological environment while mechanically modifying the soil. In this paper, the effect of glutinous rice slurry on the shear strength of lime soil under freeze-thaw cycles was studied. The characteristics of stress-strain curves, shear strength, cohesion and internal friction angle of modified soil with glutinous rice slurry under different freeze-thaw cycles (0 times, 1 times, 3 times, 6 times, 10 times) were studied by adding glutinous rice slurry with different mass concentration (0%, 2%, 4%, 6%, 8%) into lime soil (lime mass concentration was 10%). The results show that the shear strength of modified soil can be improved by adding glutinous rice slurry into lime soil, but excessive concentration of glutinous rice slurry results in reduced shear strength. When the concentration of glutinous rice slurry is 6%, the shear strength of modified soil is large. Freeze-thaw cycles lead to the decrease of shear strength of modified soil, glutinous rice slurry can reduce the strength loss of modified soil under freeze-thaw cycles. Under the action of freeze-thaw cycle, the change trends of cohesion and internal friction angle of modified soil are different. The test results provide reference for the modification of subgrade soil in seasonal frozen soil area by glutinous rice slurry.

Key words: seasonal frozen soil, glutinous rice slurry, lime, freeze-thaw cycle, direct shear test, shear strength

中图分类号:

U414

张阳, 麻梦梦, 刘佳鑫, 邓杰. 冻融循环下糯米浆对石灰土抗剪强度的影响[J]. 硅酸盐通报, 2022, 41(7): 2430-2437.

ZHANG Yang, MA Mengmeng, LIU Jiaxin, DENG Jie. Effect of Glutinous Rice Slurry on Shear Strength of Lime Soil under Freeze-Thaw Cycle[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2430-2437.

参考文献

[1] 常娟,王根绪,高永恒,等.青藏高原多年冻土区积雪对沼泽、草甸浅层土壤水热过程的影响[J].生态学报,2012,32(23):7289-7301.
CHANG J, WANG G X, GAO Y H, et al. Impacts of snow cover change on soil water-heat processes of swamp and meadow in Permafrost Region, Qinghai-Tibetan Plateau[J]. Acta Ecologica Sinica, 2012, 32(23): 7289-7301 (in Chinese).
[2] 石方超.川西高原季节性冻土路基治理后冻融循环特征试验研究[D].绵阳:西南科技大学,2019.
SHI F C. Experimental study on characteristics of freeze-thaw cycles after seasonal frozen soil roadbed treatment in western Sichuan plateau[D]. Mianyang: Southwest University of Science and Technology, 2019 (in Chinese).
[3] 常丹,刘建坤,李旭,等.冻融循环对青藏粉砂土力学性质影响的试验研究[J].岩石力学与工程学报,2014,33(7):1496-1502.
CHANG D, LIU J K, LI X, et al. Experiment study of effects of freezing-thawing cycles on mechanical properties of Qinghai-Tibet silty sand[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(7): 1496-1502 (in Chinese).
[4] GONG Y F, HE Y L, HAN C P, et al. Stability analysis of soil embankment slope reinforced with polypropylene fiber under freeze-thaw cycles[J]. Advances in Materials Science and Engineering, 2019, 2019: 5725708.
[5] 常丹,刘建坤,李旭.冻融循环下粉砂土屈服及强度特性的试验研究[J].岩石力学与工程学报,2015,34(8):1721-1728.
CHANG D, LIU J K, LI X. Experimental study on yielding and strength properies of silty sand under freezing-thawing cycles[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(8): 1721-1728 (in Chinese).
[6] 杨智.季节性冻土区粉砂土路基变形特性研究[J].计算机仿真,2022,39(1):274-278.
YANG Z. Research on deformation characteristics of silty subgrade in seasonal frozen soil area[J]. Computer Simulation, 2022, 39(1): 274-278 (in Chinese).
[7] 王协群,周琪,韩仲,等.常温脱湿与冻融路径下压实土的土水特征[J].中南大学学报(自然科学版),2021,52(10):3559-3570.
WANG X Q, ZHOU Q, HAN Z, et al. Soil-water characteristics of compacted soils during drying at room temperature and in freezing-thawing[J]. Journal of Central South University (Science and Technology), 2021, 52(10): 3559-3570 (in Chinese).
[8] 崔宏环,张振寰,何静云,等.冻融循环下路基改良土力学特性及破坏应变能密度研究[J].安全与环境学报,2021,21(5):1957-1963.
CUI H H, ZHANG Z H, HE J Y, et al. Research on improved subgrade soil mechanical properties and failure strain energy density under freeze-thaw cycles[J]. Journal of Safety and Environment, 2021, 21(5): 1957-1963 (in Chinese).
[9] 沈宇鹏,刘越,邰博文,等.冻融循环下含砂粉土冻胀率和融沉系数的试验研究[J].铁道学报,2021,43(9):118-126.
SHEN Y P, LIU Y, TAI B W, et al. Experimental study on thawing settlement coefficient and frost heave rate of sandy silt under freeze-thaw cycle[J]. Journal of the China Railway Society, 2021, 43(9): 118-126 (in Chinese).
[10] 杨俊,童磊,许威,等.冻融循环影响风化砂改良膨胀土抗剪强度室内试验研究[J].工程地质学报,2015,23(1):65-71.
YANG J, TONG L, XU W, et al. Laboratory research on effect of freeze-thaw cycles to shear strength of weathered sand improved with expansive soil[J]. Journal of Engineering Geology, 2015, 23(1): 65-71 (in Chinese).
[11] TANG L, CONG S Y, GENG L, et al. The effect of freeze-thaw cycling on the mechanical properties of expansive soils[J]. Cold Regions Science and Technology, 2018, 145: 197-207.
[12] VASILIEV N K, PRONK A D C, SHATALINA I N, et al. A review on the development of reinforced ice for use as a building material in cold regions[J]. Cold Regions Science and Technology, 2015, 115: 56-63.
[13] LU Y, LIU S H, ZHANG Y G, et al. Freeze-thaw performance of a cement-treated expansive soil[J]. Cold Regions Science and Technology, 2020, 170: 102926.
[14] HOTINEANU A, BOUASKER M, ALDAOOD A, et al. Effect of freeze-thaw cycling on the mechanical properties of lime-stabilized expansive clays[J]. Cold Regions Science and Technology, 2015, 119: 151-157.
[15] 张秀英,廖照江,杨林,等.β-环糊精与碳酸钙结晶的相互作用[J].化学学报,2003,61(1):69-73.
ZHANG X Y, LIAO Z J, YANG L, et al. Interaction between β-cyclodextrin and crystallization of calcium carbonate[J]. Acta Chimica Sinica, 2003, 61(1): 69-73 (in Chinese).
[16] 闫强强,王社良,吴卓,等.偏高岭土增强传统糯米-石灰浆力学性能及耐久性试验研究[J].混凝土,2021(12):113-116.
YAN Q Q, WANG S L, WU Z, et al. Experimental study on the mechanical properties and durability of traditional glutinous rice-lime slurry enhanced by metakaolin[J]. Concrete, 2021(12): 113-116 (in Chinese).
[17] 谌文武,张起勇,张帅,等.SH灰土和糯米浆灰土材料物理力学性质对比[J].兰州大学学报(自然科学版),2017,53(6):764-769.
CHEN W W, ZHANG Q Y, ZHANG S, et al. Comparison between the physical and mechanical properties of SH and sticky rice lime-soil materials[J]. Journal of Lanzhou University (Natural Sciences), 2017, 53(6): 764-769 (in Chinese).
[18] 纪晓佳,宋茂强,庞苗.糯米浆三合土的物理力学性能试验研究[J].建筑技术,2013,44(6):540-543.
JI X J, SONG M Q, PANG M. Experimental study on physical and mechanical properties of sticky rice-lime mortar[J]. Architecture Technology, 2013, 44(6): 540-543 (in Chinese).
[19] 杨富巍,张秉坚,潘昌初,等.以糯米灰浆为代表的传统灰浆:中国古代的重大发明之一[J].中国科学(E辑:技术科学),2009,39(1):1-7.
YANG F W, ZHANG B J, PAN C C, et al. Traditional mortar represented by glutinous rice mortar: one of the great inventions in ancient China[J]. Science in China (Series E: Technological Sciences), 2009, 39(1): 1-7 (in Chinese).
[20] 唐晓武,王艳,林廷松,等.桐油和糯米汁改良土体防渗性和耐久性的研究[J].岩土工程学报,2010,32(3):351-355.
TANG X W, WANG Y, LIN T S, et al. Permeability and durability of soils improved by tung oil and sticky rice juice[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(3): 351-355 (in Chinese).
[21] 徐树媛.厚黄土区松散含水层地下水对煤矿开采响应机制的研究[D].太原:太原理工大学,2020.
XU S Y. Study on response mechanism of loose aquifer groundwater to coal mining in thick loess area[D]. Taiyuan: Taiyuan University of Technology, 2020 (in Chinese).
[22] ZHANG Q, LI B B, ZENG Q, et al. Erosion of aerial lime and sticky rice mortars by cyclic wetting-drying and dilute sulfate acid actions[J]. Advances in Cement Research, 2020, 32(8): 343-357.
[23] WANG S H, DING J L, XU J, et al. Shear strength behavior of coarse-grained saline soils after freeze-thaw[J]. KSCE Journal of Civil Engineering, 2019, 23(6): 2437-2452.
[24] NGUYEN T T H, CUI Y J, FERBER V, et al. Effect of freeze-thaw cycles on mechanical strength of lime-treated fine-grained soils[J]. Transportation Geotechnics, 2019, 21: 100281.
[25] BROMS B,唐念慈.用石灰及水泥土柱稳定边坡和深开挖[J].岩土工程学报,1986,8(6):18-25.
BROMS B, TANG N C. Stabilization of slopes and deep excavations with lime and cement columns[J]. Chinese Journal of Geotechnical Engineering, 1986, 8(6): 18-25 (in Chinese).
[26] 王天亮,刘建坤,田亚护.冻融作用下水泥及石灰改良土静力特性研究[J].岩土力学,2011,32(1):193-198.
WANG T L, LIU J K, TIAN Y H. Static properties of cement-and lime-modified soil subjected to freeze-thaw cycles[J]. Rock and Soil Mechanics, 2011, 32(1): 193-198 (in Chinese).
[27] 杨广庆.水泥改良土的动力特性试验研究[J].岩石力学与工程学报,2003,22(7):1156-1160.
YANG G Q. Study of dynamic performance of cement-improved soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(7): 1156-1160 (in Chinese).
[28] 宁宝宽,陈四利,刘斌.冻融循环对水泥土力学性质影响的研究[J].低温建筑技术,2004,26(5):10-12.
NING B K, CHEN S L, LIU B. Influence of freezing and thawing cycles on mechanical properties of cemented soil[J]. Low Temperature Architecture Technology, 2004, 26(5): 10-12 (in Chinese).
[29] 韩春鹏,贾艳敏,何东坡,等.冻融循环作用下石灰改良粘土抗剪强度衰减规律[J].中外公路,2013,33(3):256-260.
HAN C P, JIA Y M, HE D P, et al. The attenuation law of shear strength of lime-improved clay under freeze-thaw cycle [J]. Journal of China & Foreign Highway, 2013, 33(3): 256-260 (in Chinese).
[30] 张雅文.有机物对氧化钙碳化过程及性能的影响[D].西安:陕西科技大学,2012.
ZHANG Y W. Effect of organic matter on the carbonation process and the performance of calcium oxide[D]. Xi’an: Shaanxi University of Science & Technology, 2012 (in Chinese).
[31] 王孟达,王峰,李仁罕,等.糯米灰浆在古建筑修复中的应用[J].建材发展导向,2018,16(9):2.
WANG M D, WANG F, LI R H, et al. Application of glutinous rice mortar in restoration of ancient buildings[J]. Development Orientation of Building Materials, 2018, 16(9): 2 (in Chinese).
[32] 赵佩.糯米灰浆对遗址土的加固效果及机理研究[D].兰州:兰州大学,2017.
ZHAO P. The effects and mechanism study of earthen sites reinforced by sticky rice mortar[D]. Lanzhou: Lanzhou University, 2017 (in Chinese).
[33] 郭丽明,阳令明,张俭民,等.掺和料对传统糯米灰浆影响的实验研究[J].重庆建筑,2018,17(11):48-50.
GUO L M, YANG L M, ZHANG J M, et al. Experimental study on effect of admixture on traditional glutinous rice mortar[J]. Chongqing Architecture, 2018, 17(11): 48-50 (in Chinese).
[34] 许雷,刘斯宏,鲁洋,等.冻融循环下膨胀土物理力学特性研究[J].岩土力学,2016,37(s2):167-174.
XU L, LIU S H, LU Y, et al. Physico-mechanical properties of expansive soil under freeze-thaw cycles[J]. Rock and Soil Mechanics, 2016, 37(s2): 167-174 (in Chinese).
[35] 张莲海,马巍,杨成松.冻融循环过程中土体的孔隙水压力测试研究[J].岩土力学,2015,36(7):1856-1864.
ZHANG L H, MA W, YANG C S. Pore water pressure measurement for soil subjected to freeze-thaw cycles[J]. Rock and Soil Mechanics, 2015, 36(7): 1856-1864 (in Chinese).
[36] 彭虹智.不同养护条件下糯米浆加固灰土的物理力学性质研究[D].兰州:兰州大学,2017.
PENG H Z. Study on physical and mechanical properties of sticky rice lime-soil under different curing conditions[D]. Lanzhou: Lanzhou University, 2017 (in Chinese).
[37] 刘琳.冻融循环条件下石灰改良粘性土的动静力特性研究[D].长春:吉林建筑大学,2019.
LIU L. Study on dynamic and static properties of lime-modified clayey soil to freezing and thawing[D]. Changchun: Jilin Jianzhu University, 2019 (in Chinese).