生物酶改良膨胀土的修正殷宗泽模型
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摘要
以描述生物酶改良膨胀土的应力-应变关系为研究目的,提出基于生物酶掺量的修正殷宗泽模型。开展了一系列三轴排水剪切试验。对不同生物酶掺量下改良膨胀土的弹性形变演化规律进行了分析,同时研究了生物酶掺量与剪切压缩、剪切膨胀相关的屈服面形状的演化规律,以及与破坏线方程的演化规律。在此基础上分析了生物酶掺量对殷宗泽模型的参数影响规律。引入生物酶掺量作为修正殷宗泽模型的修正因子,最终对殷宗泽模型进行了修正。研究结果表明:生物酶能有效地提高改良膨胀土的力学性能,修正殷宗泽模型能够很好地描述生物酶改良膨胀土的土体本构关系。对比修正殷宗泽模型的理论计算值与试验值,两者具有很高的吻合度,且修正殷宗泽模型的参数确定方法与殷宗泽模型参数确定方法相同。
The purpose of this study is to establish a modified Yin's double-yield-surface model based on the ratio of bioenzyme-based soil stabiliser, which can accurately describe the physical and mechanical properties of the bioenzyme-treated expansive soil. A series of drained triaxial shear tests was carried out to study the evolution laws of stress-strain, the elastic deformation, yield surface shape, dilatant yield surface, and failure line equation relating to the content of bioenzyme. Moreover, the effect of the bioenzyme content on the parameters of the Yin's model was analysed. Finally, the bioenzyme content was introduced as a correction factor for the modified Yin's double yield surfaces model. The results show that the bioenzyme can effectively improve the mechanical properties of the treated expansive soil. The modified Yin's double-yield-surface model can well describe the constitutive relation of the bioenzyme-treated expansive soil. The theoretical calculation results of the modified Yin's model show good agreement with the experimental results. Besides, the parameter determination method of the modified model is consistent with Yin's original model.
The purpose of this study is to establish a modified Yin's double-yield-surface model based on the ratio of bioenzyme-based soil stabiliser, which can accurately describe the physical and mechanical properties of the bioenzyme-treated expansive soil. A series of drained triaxial shear tests was carried out to study the evolution laws of stress-strain, the elastic deformation, yield surface shape, dilatant yield surface, and failure line equation relating to the content of bioenzyme. Moreover, the effect of the bioenzyme content on the parameters of the Yin's model was analysed. Finally, the bioenzyme content was introduced as a correction factor for the modified Yin's double yield surfaces model. The results show that the bioenzyme can effectively improve the mechanical properties of the treated expansive soil. The modified Yin's double-yield-surface model can well describe the constitutive relation of the bioenzyme-treated expansive soil. The theoretical calculation results of the modified Yin's model show good agreement with the experimental results. Besides, the parameter determination method of the modified model is consistent with Yin's original model.
引文
[1]郑健龙,张锐.公路膨胀土路基变形预测与控制方法[J].中国公路学报, 2015, 28(3):1-10.ZHENG Jian-long, ZHANG Rui. Prediction and control method for deformation of highway expansive soil subgrade[J]. China Journal of Highway and Transport,2015, 28(3):1-10.
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[10] SHARMA R S, PHANIKUMAR B R, RAO B V.Engineering behavior of a remolded expansive clay blended with lime,calcium chloride,and rice-husk ash[J].Journal of Materials in Civil Engineering, 2008, 20(8):509-515.
[11] KUMAR A, WALIA B S, BAJAJ A. Influence of fly ash,lime, and polyester fibers on compaction and strength properties of expansive soil[J]. Journal of Materials in Civil Engineering, 2007, 19(3):242-248.
[12] KHATTAB S A A, AL-MUKHTAR M, FLEUREAU J M.Long-term stability characteristics of a lime-treated plastic soil[J]. Journal of Materials in Civil Engineering, 2007, 19(4):358-366.
[13] MADHYANNAPU R S, PUPPALA A J, NAZARIAN S,et al. Quality assessment and quality control of deep soil mixing construction for stabilizing expansive subsoils[J].Journal of Geotechnical and Geoenvironmental Engineering, 2010, 136(1):119-128.
[14]李吴刚,杨庆,刘文化,等.基于SFG模型的非饱和膨胀土本构模型研究[J].岩土工程学报, 2015, 37(8):1449-1453.LI Wu-gang, YANG Qing, LIU Wen-hua, et al.Constitutive model for unsaturated expansive clays based on SFG model[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(8):1449-1453.
[15] LIU J, CHEN P, LU Z, et al. Numerical analysis method considering coupled effects of THMC multifields on unsaturated expansive soil subgrade treated with lime[J].Geofluids, 2018, 2018:1-14.
[16]汪明武,秦帅,李健,等.合肥石灰改良膨胀土的非饱和强度试验研究[J].岩石力学与工程学报, 2014,33(增刊2):4233-4238.WANG Ming-wu, QIN Shuai, LI Jian, et al. Strength of unsaturated lime-treated expansive clay in Hefei[J].Chinese Journal of Rock Mechanics and Engineering,2014, 33(Suppl.2):4233-4238.
[17]姚仰平,张丙印,朱俊高.土的基本特性、本构关系及数值模拟研究综述[J].土木工程学报, 2012, 45(3):127-150.YAO Yang-ping, ZHANG Bing-yin, ZHU Jun-gao.Behaviors, constitutive models and numerical simulation of soils[J]. China Civil Engineering Journal, 2012,45(3):127-150.
[18] ROSCOE K H, BURLAND J B. On the generalised stress-strain behavior of ‘wet’ clay[J]. Engineering Plasticity, 1968:535-609.
[19]黄文熙.硬化规律对土的弹塑性应力-应变模型影响的研究[J].岩土工程学报, 1980, 2(1):1-11.HUANG Wen-xi. The influence of the hardening law on the formulation of the elasto-plastic model of soil[J].Chinese Journal of Geotechnical Engineering, 1980,2(1):1-11.
[20]殷宗泽.一个土体的双屈服面应力-应变模型[J].岩土工程学报, 1988, 10(4):64-71.YIN Zong-ze. A stress-strain model of soil with double yield surfaces[J]. Chinese Journal of Geotechnical Engineering, 1988, 10(4):64-71.
[21] SALCCB A F, CHEN W F,张学言.土的本构关系综述[J].力学进展, 1987, 17(2):119-126.SALCCB A F, CHEN W F, ZHANG Xue-yan. A summary of the constitutive relations of soil[J]. Advances in Mechanics, 1987, 17(2):119-126.
[22]中华人民共和国交通部. JTG E40-2007公路土工试验规程[S].北京:人民交通出版社, 2007.Ministry of Communications of the People’s Republic of China. JTG E40-2007 Test methods of soils for highway engineering[S]. Beijing:China Communication Press,2007.
[23] HENKEL D J. The relationships between the effective stresses and water content in saturated clays[J].Geotechnique, 1960, 10(2):41-54.
[2]中华人民共和国行业标准编写组. JTG D30―2015公路路基设计规范[S].北京:人民交通出版社, 2015.The Professional Standards Compilation Group of People’s Republic of China. JTG D30―2015Specifications for design of highway subgrades[S].Beijing:China Communications Press, 2015.
[3]中华人民共和国行业标准编写组. JTG F10-2006公路路基施工技术规范[S].北京:人民交通出版社,2006.The Professional Standards Compilation Group of People’s Republic of China. JTG F10-2006 Technical specification for construction of highway subgrades[S].Beijing:China Communications Press, 2006.
[4]曾娟娟,文畅平,包嘉邈,等.生物酶改性膨胀土室内三轴试验研究[J].中国科技论文, 2017, 12(6):660-665.ZENG Juan-juan, WEN Chang-ping, BAO Jia-miao, et al.Study on bio-enzyme-treated expansive soil by laboratory triaxial test[J]. China Science Paper, 2017, 12(6):660-665.
[5]曾娟娟,文畅平,苏伟,等.基于生物酶改良膨胀土的试验研究[J].建筑科学, 2017, 33(5):69-73.ZENG Juan-juan, WEN Chang-ping, SU Wei, et al.Experiment research of bio-enzyme expansive soil modified[J]. Building Science, 2017, 33(5):69-73.
[6]戴北冰,徐锴,杨峻,等.基于生物酶的固土技术在香港的应用研究[J].岩土力学, 2014, 35(6):1735-1742.DAI Bei-bing, XU Kai, YANG Jun, et al. An investigation into application of bio-enzyme-based soil stabilization technology to Hong Kong[J]. Rock and Soil Mechanics,2014, 35(6):1735-1742.
[7] SHANKAR A U R, RAI H K, RAMESHA M I.Bio-enzyme stabilized lateritic soil as a highway material[J]. Journal of the Indian Roads Congress,2009, 70(2):143-151.
[8] MGANGIRA M B. Evaluation of the effects of enzyme-based liquid chemical stabilizers on subgrade soils[C]//28th Southern African Transport Conference.Pretoria:[s. n.], 2009:192-199.
[9] NAAGESH S, GANGADHARA S. Swelling properties of bio-enzyme treated expansive soil[J]. International Journal of Engineering Studies, 2010, 2(2):155-159.
[10] SHARMA R S, PHANIKUMAR B R, RAO B V.Engineering behavior of a remolded expansive clay blended with lime,calcium chloride,and rice-husk ash[J].Journal of Materials in Civil Engineering, 2008, 20(8):509-515.
[11] KUMAR A, WALIA B S, BAJAJ A. Influence of fly ash,lime, and polyester fibers on compaction and strength properties of expansive soil[J]. Journal of Materials in Civil Engineering, 2007, 19(3):242-248.
[12] KHATTAB S A A, AL-MUKHTAR M, FLEUREAU J M.Long-term stability characteristics of a lime-treated plastic soil[J]. Journal of Materials in Civil Engineering, 2007, 19(4):358-366.
[13] MADHYANNAPU R S, PUPPALA A J, NAZARIAN S,et al. Quality assessment and quality control of deep soil mixing construction for stabilizing expansive subsoils[J].Journal of Geotechnical and Geoenvironmental Engineering, 2010, 136(1):119-128.
[14]李吴刚,杨庆,刘文化,等.基于SFG模型的非饱和膨胀土本构模型研究[J].岩土工程学报, 2015, 37(8):1449-1453.LI Wu-gang, YANG Qing, LIU Wen-hua, et al.Constitutive model for unsaturated expansive clays based on SFG model[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(8):1449-1453.
[15] LIU J, CHEN P, LU Z, et al. Numerical analysis method considering coupled effects of THMC multifields on unsaturated expansive soil subgrade treated with lime[J].Geofluids, 2018, 2018:1-14.
[16]汪明武,秦帅,李健,等.合肥石灰改良膨胀土的非饱和强度试验研究[J].岩石力学与工程学报, 2014,33(增刊2):4233-4238.WANG Ming-wu, QIN Shuai, LI Jian, et al. Strength of unsaturated lime-treated expansive clay in Hefei[J].Chinese Journal of Rock Mechanics and Engineering,2014, 33(Suppl.2):4233-4238.
[17]姚仰平,张丙印,朱俊高.土的基本特性、本构关系及数值模拟研究综述[J].土木工程学报, 2012, 45(3):127-150.YAO Yang-ping, ZHANG Bing-yin, ZHU Jun-gao.Behaviors, constitutive models and numerical simulation of soils[J]. China Civil Engineering Journal, 2012,45(3):127-150.
[18] ROSCOE K H, BURLAND J B. On the generalised stress-strain behavior of ‘wet’ clay[J]. Engineering Plasticity, 1968:535-609.
[19]黄文熙.硬化规律对土的弹塑性应力-应变模型影响的研究[J].岩土工程学报, 1980, 2(1):1-11.HUANG Wen-xi. The influence of the hardening law on the formulation of the elasto-plastic model of soil[J].Chinese Journal of Geotechnical Engineering, 1980,2(1):1-11.
[20]殷宗泽.一个土体的双屈服面应力-应变模型[J].岩土工程学报, 1988, 10(4):64-71.YIN Zong-ze. A stress-strain model of soil with double yield surfaces[J]. Chinese Journal of Geotechnical Engineering, 1988, 10(4):64-71.
[21] SALCCB A F, CHEN W F,张学言.土的本构关系综述[J].力学进展, 1987, 17(2):119-126.SALCCB A F, CHEN W F, ZHANG Xue-yan. A summary of the constitutive relations of soil[J]. Advances in Mechanics, 1987, 17(2):119-126.
[22]中华人民共和国交通部. JTG E40-2007公路土工试验规程[S].北京:人民交通出版社, 2007.Ministry of Communications of the People’s Republic of China. JTG E40-2007 Test methods of soils for highway engineering[S]. Beijing:China Communication Press,2007.
[23] HENKEL D J. The relationships between the effective stresses and water content in saturated clays[J].Geotechnique, 1960, 10(2):41-54.