| Citation: | XIAN Shuxing，YE Yang，LI Changdong，et al. FDEM numerical simulation study on deterioration characteristics of weak-hard interbedded strata landslide-anti-slide pile system under wetting-drying cycles[J]. Bulletin of Geological Science and Technology，2025，${article_volume}（0）：1-15 doi: 10.19509/j.cnki.dzkq.tb20230700
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In Zigui Basin of the Three Gorges Reservoir region, prone-sliding strata mainly composed of weak-hard interbedded strata are widely distributed. Under the action of long-term reservoir water immersion, erosion and rainfall, the formation rock and soil bodies deteriorate and become an important internal cause of reducing landslide stability and affecting project safety.
Taking rock and soil mass of weak-hard interbedded strata as the research object, finite discrete element method (FDEM) is used to calibrate the mechanical properties of hard and soft rocks in the weak-hard interbedded strata under different wetting-drying cycles. Then the mesh is redivided by the improved Tyson polygon program, and the embedding function of zero thickness cohesive force unit is realized. The FDEM numerical model of landslide-anti-slide pile system in weak-hard interbedded strata formation is proposed and established. Finally, the formation process of landslide cracks and the embedding mechanism of anti-slide piles under different wetting-drying cycles are studied.
The results show that: ① The number of simulated landslide cracks increases with the increase of the number of wetting-drying cycles, and the cracks width also increases gradually. The results of simulation are basically consistent with those of the site of Majiagou landslide. ② The simulated cracks of the landslide-anti-slide pile system show two evolutionary patterns: one is that the cracks spread downward from the rock mass on the top side of the pile along the pile body; the other is that the cracks gradually extend from around the anti-slide pile to the inside of the slide body, connecting with the transverse cracks and vertical cracks, and finally forming large through cracks. ③ When the number of wetting-drying cycles increases, the horizontal displacement, bending moment and shear force of anti-slide pile also increase. ④ The cracks in the weak-hard interbedded strata bedrock of the anti-slide pile have the characteristics of localized development, and with the increase of the number of wetting-drying cycles, the stress in the region gradually decreases, the displacement and strain gradually increase, and the corresponding cracks become more and more intensive.
The results of this study can provide support for the prevention and control of landslide in weak-hard interbedded strata under different wetting-drying cycles.
| [1] |
杨顺安,晏同珍. 预测滑坡学概要[J]. 中国地质灾害与防治学报,1998,9(增刊1):4-9.
YANG S A,YAN T Z. Summary of prediction landslideology[J]. The Chinese Journal of Geological Hazard and Control,1998,9(S1):4-9. (in Chinese with English abstract
|
| [2] |
汪发武,宋琨. 库水位涨落条件下不同结构边坡的变形破坏机制分析:以千将坪滑坡和树坪滑坡为例[J]. 工程地质学报,2021,29(3):575-582.
WANG F W,SONG K. Analysis of deformation and failure mechanism of bank slopes with different structures under reservoir water level fluctuation:Taking Qianjiangping landslide and Shuping landslide as examples[J]. Journal of Engineering Geology,2021,29(3):575-582. (in Chinese with English abstract
|
| [3] |
李长冬,谭钦文. 动水驱动型滑坡物理启滑能够预测吗?[J]. 地球科学,2022,47(10):3908-3910.
LI C D,TAN Q W. Can the physical start-up of hydrodynamic landslide be predicted?[J]. Earth Science,2022,47(10):3908-3910. (in Chinese with English abstract
|
| [4] |
丰月华,罗晓娟,李俊良,等. 上硬下软地层中h型桩与滑坡相互作用机理模型试验研究[J]. 地质科技通报,2022,41(6):242-252.
FENG Y H,LUO X J,LI J L,et al. Physical model tests on the interaction of h-type stabilizing piles and landslides in bedrock with upper hard and lower weak strata[J]. Bulletin of Geological Science and Technology,2022,41(6):242-252. (in Chinese with English abstract
|
| [5] |
王贵华,李长冬,贺鑫,等. 不同布锚方式对锚索抗滑桩受力与变形影响的物理模型试验研究[J]. 地质科技通报,2022,41(6):262-277.
WANG G H,LI C D,HE X,et al. Physical model test on the effect of different anchoring methods on the mechanical and deformation characteristics of anchored slide-resistant piles[J]. Bulletin of Geological Science and Technology,2022,41(6):262-277. (in Chinese with English abstract
|
| [6] |
王贵华,李长冬,陈文强,等. 复合多层滑床条件下锚索抗滑桩受力特征研究[J]. 岩石力学与工程学报,2019,38(11):2219-2230.
WANG G H,LI C D,CHEN W Q,et al. Mechanical characteristics of anchored slide-resistant piles under the condition of composite multilayer sliding bed[J]. Chinese Journal of Rock Mechanics and Engineering,2019,38(11):2219-2230. (in Chinese with English abstract
|
| [7] |
罗晓娟,寇桓嘉,祝国强,等. 断层破碎带条件下组合式圆截面抗滑桩加固边坡效果研究[J]. 地质科技通报,2022,41(6):253-261.
LUO X J,KOU H J,ZHU G Q,et al. Effect of combined anti-slide piles with circular section to reinforce the slope containing the fault crushed zone[J]. Bulletin of Geological Science and Technology,2022,41(6):253-261. (in Chinese with English abstract
|
| [8] |
王旋,胡新丽,周昌,等. 基于物理模型试验的滑坡-抗滑桩位移场变化特征[J]. 地质科技通报,2020,39(4):103-108.
WANG X,HU X L,ZHOU C,et al. Model test on the displacement field characteristics of the landslide stabilizing piles[J]. Bulletin of Geological Science and Technology,2020,39(4):103-108. (in Chinese with English abstract
|
| [9] |
唐雅婷,谭杰,李长冬,等. 基于模型试验的动水驱动型顺层岩质滑坡启滑机制初探[J]. 地质科技通报,2022,41(6):137-148.
TANG Y T,TAN J,LI C D,et al. Preliminary study on the initiation mechanism of hydrodynamic-driven bedding rock landslides based on physical model tests[J]. Bulletin of Geological Science and Technology,2022,41(6):137-148. (in Chinese with English abstract
|
| [10] |
叶海林,郑颖人,黄润秋,等. 强度折减动力分析法在滑坡抗滑桩抗震设计中的应用研究[J]. 岩土力学,2010,31(增刊1):317-323.
YE H L,ZHENG Y R,HUANG R Q,et al. Study of application of strength reduction dynamic analysis method to aseismic design of anti-slide piles for landslide[J]. Rock and Soil Mechanics,2010,31(S1):317-323. (in Chinese with English abstract
|
| [11] |
周云涛,石胜伟,蔡强,等. 基于能量损失的抗滑桩损伤模型及其应用[J]. 地质力学学报,2019,25(6):1107-1115.
ZHOU Y T,SHI S W,CAI Q,et al. Damage model of anti-slide pile based on energy loss and its application[J]. Journal of Geomechanics,2019,25(6):1107-1115. (in Chinese with English abstract
|
| [12] |
咸玉建,陈学军,汪志刚,等. 基于有限元强度折减系数法岩土边坡稳定性分析与抗滑桩设计[J]. 地质科技情报,2015,34(4):176-182.
XIAN Y J,CHEN X J,WANG Z G,et al. Geotechnical slope stability analysis and the design of anti-slide pile based on strength reduction FEM[J]. Geological Science and Technology Information,2015,34(4):176-182. (in Chinese with English abstract
|
| [13] |
张晓平,王思敬,王幼明,等. 二维离散元模拟抗滑桩的折算方法研究[J]. 岩土工程学报,2010,32(2):271-278.
ZHANG X P,WANG S J,WANG Y M,et al. Conversion of anti-sliding piles into 2-dimensional discrete element simulation[J]. Chinese Journal of Geotechnical Engineering,2010,32(2):271-278. (in Chinese with English abstract
|
| [14] |
赵健,杨立,邓冬梅,等. 基于3DEC对某输电线路新建铁塔岩质边坡的稳定性评价[J]. 安全与环境工程,2018,25(2):55-60.
ZHAO J,YANG L,DENG D M,et al. Stability evaluation with 3DEC for the rock slope under a newly-built transmission line tower[J]. Safety and Environmental Engineering,2018,25(2):55-60. (in Chinese with English abstract
|
| [15] |
MAHABADI O K,LISJAK A,MUNJIZA A,et al. Y-geo:New combined finite-discrete element numerical code for geomechanical applications[J]. International Journal of Geomechanics,2012,12(6):676-688. doi: 10.1061/(ASCE)GM.1943-5622.0000216
|
| [16] |
ELMO D,STEAD D,EBERHARDT E,et al. Applications of finite/discrete element modeling to rock engineering problems[J]. International Journal of Geomechanics,2013,13(5):565-580. doi: 10.1061/(ASCE)GM.1943-5622.0000238
|
| [17] |
MUNJIZA A. The combined finite-discrete element method[M]. New York:John Wiley & Sons,2004.
|
| [18] |
LEI Q H,LATHAM J P,XIANG J S. Implementation of an empirical joint constitutive model into finite-discrete element analysis of the geomechanical behaviour of fractured rocks[J]. Rock Mechanics and Rock Engineering,2016,49(12):4799-4816. doi: 10.1007/s00603-016-1064-3
|
| [19] |
WU Z J,ZHANG P L,FAN L F,et al. Numerical study of the effect of confining pressure on the rock breakage efficiency and fragment size distribution of a TBM cutter using a coupled FEM-DEM method[J]. Tunnelling and Underground Space Technology,2019,88:260-275. doi: 10.1016/j.tust.2019.03.012
|
| [20] |
YAN C Z,ZHENG H. FDEM-flow3D:A 3D hydro-mechanical coupled model considering the pore seepage of rock matrix for simulating three-dimensional hydraulic fracturing[J]. Computers and Geotechnics,2017,81:212-228. doi: 10.1016/j.compgeo.2016.08.014
|
| [21] |
陶志刚,张海江,尹利洁,等. 基于FDEM的戒台寺古滑体开裂破坏过程数值模拟[J]. 水文地质工程地质,2017,44(3):105-112.
TAO Z G,ZHANG H J,YIN L J,et al. Numerical modeling of cracking for the Jietai temple ancient landslide with the combined finite-discrete element method[J]. Hydrogeology & Engineering Geology,2017,44(3):105-112. (in Chinese with English abstract
|
| [22] |
SUN L,LIU Q S,ABDELAZIZ A,et al. Simulating the entire progressive failure process of rock slopes using the combined finite-discrete element method[J]. Computers and Geotechnics,2022,141:104557. doi: 10.1016/j.compgeo.2021.104557
|
| [23] |
WANG J G,WANG S,SU A J,et al. Simulating landslide-induced tsunamis in the Yangtze River at the Three Gorges in China[J]. Acta Geotechnica,2021,16(8):2487-2503. doi: 10.1007/s11440-020-01131-3
|
| [24] |
CHEN X D,WANG H F. Slope failure of noncohesive media modelled with the combined finite–discrete element method[J]. Applied Sciences,2019,9(3):579. doi: 10.3390/app9030579
|
| [25] |
BAO Y D,CHEN J P,SU L J,et al. A novel numerical approach for rock slide blocking river based on the CEFDEM model:A case study from the Samaoding paleolandslide blocking river event[J]. Engineering Geology,2023,312:106949. doi: 10.1016/j.enggeo.2022.106949
|
| [26] |
张柏楠,韩勃,代松,等. 基于FDEM的大型海上风机嵌岩单桩基础水平承载特性研究[J]. 岩石力学与工程学报,2023,42(增刊1):3309-3323.
ZHANG B N,HAN B,DAI S,et al. Research on the lateral capacity characteristics of rock-socketed single-pile foundation for large offshore wind turbines based on FDEM[J]. Chinese Journal of Rock Mechanics and Engineering,2023,42(S1):3309-3323. (in Chinese with English abstract
|
| [27] |
刘洋,吴志军,储昭飞,等. 基于FDEM的围压条件下机械冲击破岩机理研究[J]. 中南大学学报(自然科学版),2023,54(3):866-879.
LIU Y,WU Z J,CHU Z F,et al. Rock breaking mechanism with mechanical impact under confining pressure based on FDEM[J]. Journal of Central South University(Science and Technology),2023,54(3):866-879. (in Chinese with English abstract
|
| [28] |
GRIFFITH A A. The phenomena of rupture and flow in solids[J]. Philosophical Transactions of the Royal Society of London Series A,Containing Papers of a Mathematical or Physical Character,1921,221:163-198.
|
| [29] |
孙秋荣. 基于FDEM的混凝土开裂破坏过程的数值模拟[J]. 水利水电技术(中英文),2021,52(7):192-199.
SUN Q R. Numerical simulation of cracking and failure process of concrete based on FDEM[J]. Water Resources and Hydropower Engineering,2021,52(7):192-199. (in Chinese with English abstract
|
| [30] |
程树范,曾亚武,高睿,等. 黏土岩中水泥锚固体滑脱的有限-离散元模型初探[J]. 岩土工程学报,2023,45(12):2594-2603.
CHENG S F,ZENG Y W,GAO R,et al. Finite-discrete element model for slip debonding of cement anchors in clay rock[J]. Chinese Journal of Geotechnical Engineering,2023,45(12):2594-2603. (in Chinese with English abstract
|
| [31] |
TATONE B S A,GRASSELLI G. A calibration procedure for two-dimensional laboratory-scale hybrid finite-discrete element simulations[J]. International Journal of Rock Mechanics and Mining Sciences,2015,75:56-72. doi: 10.1016/j.ijrmms.2015.01.011
|
| [32] |
LIU Q S,DENG P H. A numerical investigation of element size and loading/unloading rate for intact rock in laboratory-scale and field-scale based on the combined finite-discrete element method[J]. Engineering Fracture Mechanics,2019,211:442-462. doi: 10.1016/j.engfracmech.2019.02.007
|
| [33] |
LISJAK A,GRASSELLI G,VIETOR T. Continuum-discontinuum analysis of failure mechanisms around unsupported circular excavations in anisotropic clay shales[J]. International Journal of Rock Mechanics and Mining Sciences,2014,65:96-115. doi: 10.1016/j.ijrmms.2013.10.006
|
| [34] |
邓鹏海,刘泉声,黄兴. 基于Weibull分布的非均质隧洞围岩破裂碎胀FDEM数值模拟研究[J]. 工程力学,2024,41(7):40-59.
DENG P H,LIU Q S,HUANG X. Fdem numerical study on the fracture and swelling deformation of heterogeneous rock mass around tunnel based on weibull distribution[J]. Engineering Mechanics,2024,41(7):40-59. (in Chinese with English abstract
|
| [35] |
姚文敏. 基于水致岩体劣化的三峡库区侏罗系地层水库滑坡抗滑桩嵌固机理及其优化研究[D]. 武汉:中国地质大学(武汉),2020.
YAO W M. Embedded mechanism and optimization of stabilizing piles for reservoir landslides in Jurassic strata of Three Gorges Reservoir region considering water induced deterioration of rock mass[D]. Wuhan:China University of Geosciences(Wuhan),2020. (in Chinese with English abstract
|
| [36] |
YAO W M,LI C D,ZHAN H B,et al. Multiscale study of physical and mechanical properties of sandstone in Three Gorges Reservoir Region subjected to cyclic wetting-drying of Yangtze River water[J]. Rock Mechanics and Rock Engineering,2020,53(5):2215-2231. doi: 10.1007/s00603-019-02037-7
|
| [37] |
董曼曼,王亮清,葛云峰,等. 考虑滑床复合倾斜岩体综合地基系数的抗滑桩受力特征研究[J]. 岩土力学,2017,38(10):3000-3008.
DONG M M,WANG L Q,GE Y F,et al. Mechanical characteristics of anti-sliding pile considering comprehensive foundation coefficient of sliding bed on composite inclined rock mass[J]. Rock and Soil Mechanics,2017,38(10):3000-3008. (in Chinese with English abstract
|
| [38] |
唐辉明,李长冬,龚文平,等. 滑坡演化的基本属性与研究途径[J]. 地球科学,2022,47(12):4596-4608.
TANG H M,LI C D,GONG W P,et al. Fundamental attribute and research approach of landslide evolution[J]. Earth Science,2022,47(12):4596-4608. (in Chinese with English abstract
|
| [39] |
吴丹丹,胡新丽,雍睿,等. 三峡库区马家沟滑坡模型形态概化[J]. 地球科学,2014,39(11):1693-1698.
WU D D,HU X L,YONG R,et al. Generalizability method of physical model shape for Majiagou landslide in Three Gorges Reservoir area[J]. Earth Science,2014,39(11):1693-1698. (in Chinese with English abstract
|
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