基于断裂理论的湿陷性黄土劈裂注浆裂纹扩展
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摘要
为深入研究湿陷性黄土地区浆液在土体中的扩散机制,基于断裂力学理论,建立了一种浆液在二维平面中流动扩散的仿真分析方法。该方法对湿陷性黄土地区劈裂注浆过程中裂纹的产生形式、破坏准则的建立以及裂纹扩展的判定方法进行了描述,实现了对裂纹扩展问题及渗流-应力耦合问题的求解。同时,本文利用ABAQUS软件通过建立的裂缝扩展方程,分析了劈裂注浆压力及土体物理力学性质对裂纹扩展长度的影响。研究结果表明:劈裂注浆压力的计算应该重点考虑裂纹扩展长度和土体强度参数的影响;在黄土劈裂注浆过程中无法通过连续加压进行劈裂注浆,应分段加压,确保扩展过程中能量的聚集。最后,通过室内模型试验对裂缝扩展模拟结果进行了验证,得出试验与模型分析结论相近,验证了理论的合理性。
In order to study the diffusion mechanism of grout in soil body collapsible loess area,a simulation analysis method of grout flowing diffusion in 2Dsurface is proposed based on fracture mechanics theory.The formation pattern of crack was described,the failure criterion and judgment method of the crack growth in fracture grouting were established,the problems of crack growth and coupling of seepage and stress were solved.Meanwhile,by setting up the crack growth equation with ABAQUS software,the fracture grouting pressure and the influence of physico-mechanical properties of soil body on the length of crack growth were analyzed.Results show that,to calculate the facture grouting pressure,crack growth length and the soil body strength parameters must be considered.Inloess fracture grouting,fracture grouting can not obtained by continuous pressure,which should replaced by segmented pressure to ensure the aggregation of energy in crack growth process.Laboratory model experiments were carried out and the results are in good agreement with that of model analysis,verifying the proposed simulation analysis method.
In order to study the diffusion mechanism of grout in soil body collapsible loess area,a simulation analysis method of grout flowing diffusion in 2Dsurface is proposed based on fracture mechanics theory.The formation pattern of crack was described,the failure criterion and judgment method of the crack growth in fracture grouting were established,the problems of crack growth and coupling of seepage and stress were solved.Meanwhile,by setting up the crack growth equation with ABAQUS software,the fracture grouting pressure and the influence of physico-mechanical properties of soil body on the length of crack growth were analyzed.Results show that,to calculate the facture grouting pressure,crack growth length and the soil body strength parameters must be considered.Inloess fracture grouting,fracture grouting can not obtained by continuous pressure,which should replaced by segmented pressure to ensure the aggregation of energy in crack growth process.Laboratory model experiments were carried out and the results are in good agreement with that of model analysis,verifying the proposed simulation analysis method.
引文
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[12]邹金锋,童无欺,罗恒,等.基于Hoek-Brown强度准则的裂隙岩体劈裂注浆力学机理[J].中南大学学报:自然科学版,2013,44(7):2889-2896.Zou Jin-feng,Tong Wu-qi,Luo Heng,et al.Mechanism of fracture grouting for fractured rock based on Hoek-Brown failure criterion[J].Journal of Central South University(Science and Technology),2013,44(7):2889-2896.
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[14]Gothll R,Stille H.Fracture dilation during grouting[J].Tunnelling and Underground Space Technology,2009,24(3):126-135.
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[16]郑卓,李术才,刘人太,等.裂隙岩体注浆中的浆液-岩体耦合效应分析[J].岩石力学与工程学报,2015,34(2):4054-4062.Zheng Zhuo,Li Shu-cai,Liu Ren-tai,et al.Analysis of coupling effect between grout and rock mass during jointed rock grouting[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(2):4054-4062.
[17]谢定义.非饱和土力学[M].北京:高等教育出版社,2015.
[18]匡震邦,马法尚.裂纹端部场[M].西安:西安交通大学出版社,2002.
[19]沈珠江.岩土破损力学:理想脆弹塑性模型[J].岩土工程学报,2003,25(3):253-257.Shen Zhu-jiang.Breakage mechanics for geological materials:an ideal brittle-elasto-plastic model[J].Rock and Soil Mechanics,2003,25(3):253-257.
[20]Sun Chang-zheng,Zhang Qi,Zhao Tong-feng,et al.Experimental study on the stress-temperature curve of the super high early strength grouting material at elevated temperature[J].Applied Mechanics and Materials,2014,638-640:1521-1525.
[21]程永春,姜屏,谭国金,等.基于位移监测信息的土质边坡稳定性实时评判[J].吉林大学学报:工学版,2012,42(6):1487-1490.Cheng Yong-chun,Jiang Ping,Tan Guo-jin,et al.Real-time evaluation of soil slope stability based on the information of displacement monitor[J].Journal of Jilin University(Engineering and Technology Edition),2012,42(6):1487-1490.
[22]寇剑锋,徐绯,郭家平,等.黏聚力模型破坏准则及其参数选取[J].机械强度,2011,33(5):714-718.Kou Jian-feng,Xu Fei,Guo Jia-ping,et al.Damage laws of cohesive zone model and selection of the parameters[J].Journal of Mechanical Strength,2011,33(5):714-718.
[23]王起才,张戎令.劈裂注浆浆液走势与不同压力下土体位移试验研究[J].铁道学报,2011,33(12):107-111.Wang Qi-cai,Zhang Rong-ling.Experimental research on the trend of slurry about fracturing grouting and soil displacement in different pressure[J].Journal of the China Railway Society,2011,33(12):107-111.
[24]孙锋,张顶立,陈铁林,等.土体劈裂注浆过程的细观模拟研究[J].岩土工程学报,2010,32(3):474-480.Sun Feng,Zhang Ding-li,Chen Tie-lin,et al.Mesomechanical simulation of fracture grouting in soil[J].Rock and Soil Mechanics,2010,32(3):474-480.
[25]周健,张刚,孔戈.渗流的颗粒流细观模拟[J].水力学报,2006,37(1):28-32.Zhou Jian,Zhang Gang,Kong Ge.Meso-mechanics simulation of seepage with particle flow code[J].Journal of Hydraulic Engineering,2006,37(3):28-32.
[2]李利平,李术才,赵勇,等.超大断面隧道软弱破碎围岩渐进破坏过程三维地质力学模型试验研究[J].岩石力学与工程学报,2012,31(3):550-560.Li Li-ping,Li Shu-cai,Zhao Yong,et al.3Dgeomechanical model for progressive failure progress of weak broken surrounding rock in super large section tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(3):550-560.
[3]Swedenborg S,Dahlstrom L O.Rock mechanics effects of cement grouting in hard rock masses[C]∥Proceedings of the 2003 Specialty Conference on Grouting at the Third International Conference on Grouting and Ground Treatment,New Orleans,2003:1089-1102.
[4]刘汉龙,赵明华.地基处理研究进展[J].土木工程学报,2016,49(1):96-115.Liu Han-long,Zhao Ming-hua.Review of ground improvement technical and its application in China[J].China Civil Engineering Journal,2016,49(1):96-115.
[5]Bezuijen Z,Grotenhuis R T,Tol A F V,et al.Analytical model for fracture grouting in sand[J].Journal of Geotechnical and Geoenvironmental Engineering,2011,137(6):611-620.
[6]Gothll R,Stille H.Fracture-fracture interaction during grouting[J].Tunnelling and Underground Space Technology,2010,25(3):199-204.
[7]郭炎伟,贺少辉,管晓明,等.劈裂注浆复合土体平面等效弹性模型理论研究[J].岩土力学,2015,36(8):2193-2201.Guo Yan-wei,He Shao-hui,Guan Xiao-ming,et al.Theoretical study of plane equivalent elastic model of composite soils with fracturing grouting[J].Rockand Soil Mechanics,2015,36(8):193-2201.
[8]Gustafson G,Claesson J,Fransson A.Steering parameters for rock grouting[J].Journal of Applied Mathematics,2013,22(5):1643-1652.
[9]黄明利,管晓明,吕奇峰.基于弹性力学的诱导劈裂注浆机制分析[J].岩土力学,2013,34(7):2059-2064.Huang Ming-li,Guan Xiao-ming,Lyu Qi-feng.Mechanism analysis of induced fracture grouting based on elasticity[J].Rock and Soil Mechanics,2013,34(7):2059-2064.
[10]李鹏,张庆松,张霄,等.基于模型试验的劈裂注浆机制分析[J].岩土力学,2014,35(11):3221-3230.Li Peng,Zhang Qing-song,Zhang Xiao,et al.Analysis of fracture grouting mechanism based on model test[J].Rock and Soil Mechanics,2014,35(11):3221-3230.
[11]邹金锋,罗恒,李亮,等.考虑中主应力时土体劈裂灌浆力学机制的大变形分析[J].岩土力学,2008,29(9):2515-2520.Zou Jin-feng,Luo Heng,Li Liang,et al.Mechanism analysis of fracture grouting in soil with large strain considering intermediate principal stress[J].Rock and Soil Mechanics,2008,29(9):2515-2520.
[12]邹金锋,童无欺,罗恒,等.基于Hoek-Brown强度准则的裂隙岩体劈裂注浆力学机理[J].中南大学学报:自然科学版,2013,44(7):2889-2896.Zou Jin-feng,Tong Wu-qi,Luo Heng,et al.Mechanism of fracture grouting for fractured rock based on Hoek-Brown failure criterion[J].Journal of Central South University(Science and Technology),2013,44(7):2889-2896.
[13]Ni J C,Cheng W.Using fracture grouting to lift structures in clayey sand[J].Journal of Zhejiang University-Science A(Applied Physics&Engineering),2010,11(11):879-886.
[14]Gothll R,Stille H.Fracture dilation during grouting[J].Tunnelling and Underground Space Technology,2009,24(3):126-135.
[15]李世愚,和泰名,尹祥础,等.岩石断裂力学导论[M].合肥:中国科学技术大学出版社,2010.
[16]郑卓,李术才,刘人太,等.裂隙岩体注浆中的浆液-岩体耦合效应分析[J].岩石力学与工程学报,2015,34(2):4054-4062.Zheng Zhuo,Li Shu-cai,Liu Ren-tai,et al.Analysis of coupling effect between grout and rock mass during jointed rock grouting[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(2):4054-4062.
[17]谢定义.非饱和土力学[M].北京:高等教育出版社,2015.
[18]匡震邦,马法尚.裂纹端部场[M].西安:西安交通大学出版社,2002.
[19]沈珠江.岩土破损力学:理想脆弹塑性模型[J].岩土工程学报,2003,25(3):253-257.Shen Zhu-jiang.Breakage mechanics for geological materials:an ideal brittle-elasto-plastic model[J].Rock and Soil Mechanics,2003,25(3):253-257.
[20]Sun Chang-zheng,Zhang Qi,Zhao Tong-feng,et al.Experimental study on the stress-temperature curve of the super high early strength grouting material at elevated temperature[J].Applied Mechanics and Materials,2014,638-640:1521-1525.
[21]程永春,姜屏,谭国金,等.基于位移监测信息的土质边坡稳定性实时评判[J].吉林大学学报:工学版,2012,42(6):1487-1490.Cheng Yong-chun,Jiang Ping,Tan Guo-jin,et al.Real-time evaluation of soil slope stability based on the information of displacement monitor[J].Journal of Jilin University(Engineering and Technology Edition),2012,42(6):1487-1490.
[22]寇剑锋,徐绯,郭家平,等.黏聚力模型破坏准则及其参数选取[J].机械强度,2011,33(5):714-718.Kou Jian-feng,Xu Fei,Guo Jia-ping,et al.Damage laws of cohesive zone model and selection of the parameters[J].Journal of Mechanical Strength,2011,33(5):714-718.
[23]王起才,张戎令.劈裂注浆浆液走势与不同压力下土体位移试验研究[J].铁道学报,2011,33(12):107-111.Wang Qi-cai,Zhang Rong-ling.Experimental research on the trend of slurry about fracturing grouting and soil displacement in different pressure[J].Journal of the China Railway Society,2011,33(12):107-111.
[24]孙锋,张顶立,陈铁林,等.土体劈裂注浆过程的细观模拟研究[J].岩土工程学报,2010,32(3):474-480.Sun Feng,Zhang Ding-li,Chen Tie-lin,et al.Mesomechanical simulation of fracture grouting in soil[J].Rock and Soil Mechanics,2010,32(3):474-480.
[25]周健,张刚,孔戈.渗流的颗粒流细观模拟[J].水力学报,2006,37(1):28-32.Zhou Jian,Zhang Gang,Kong Ge.Meso-mechanics simulation of seepage with particle flow code[J].Journal of Hydraulic Engineering,2006,37(3):28-32.