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Initiation and Development of Water Film by Seepage 被引量:2
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作者 LU Xiaobing CUI Peng +1 位作者 HU Kaiheng ZHANG Xuhui 《Journal of Mountain Science》 SCIE CSCD 2010年第4期361-366,共6页
When water seeps upwards through a saturated soil layer,the soil layer may become instability and water films occur and develop.Water film serves as a natural sliding surface because of its very small friction.Accordi... When water seeps upwards through a saturated soil layer,the soil layer may become instability and water films occur and develop.Water film serves as a natural sliding surface because of its very small friction.Accordingly,debris flow may happen.To investigate this phenomenon,a pseudothree-phase media is presented first.Then discontinuity method is used to analyze the expansion velocity of water film.Finally,perturbation method is used to analyze the case that a water flow is forced to seep upwards through the soil layer while the movement of the skeleton may be neglected relative to that of water.The theoretical evolutions of pore pressure gradient,effective stress,water velocity,the porosity and the eroded fine grains are obtained.It can be seen clearly that with the erosion and redeposited of fine grains,permeability at some positions in the soil layer becomes smaller and smaller and,the pore pressure gradient becomes bigger and bigger,while the effective stress becomes smaller and smaller.When the effective stress equals zero,e.f.liquefaction,the water film occurs.It is shown also that once a water film occurs,it will be expanded in a speed of U(t)(1-ε). 展开更多
关键词 slope seepage Debris flow Water film
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GLOBAL COMPOSITE ELEMENT ITERATION FOR ANALYSIS OF SEEPAGE FREE SURFACE
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作者 陈洪凯 唐红梅 肖盛燮 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1999年第10期1121-1127,共7页
As one of the most difficult topics in rock mass hydromechanics, seepage free surface plays an important part in slope stability researches. Based on analysis of numerical methods to solve seepage free surface, global... As one of the most difficult topics in rock mass hydromechanics, seepage free surface plays an important part in slope stability researches. Based on analysis of numerical methods to solve seepage free surface, global composite element iteration (GCEI) is presented in this paper. FEM program is made by using GCEI. Calculation shows that not only the program is simple using GCEI, but also the tolerance is higher after 5 iterations. 展开更多
关键词 rock mass slope seepage free surface global composite element iteration verification
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Geo-slope在工程应用中竖向边界选取问题的探讨 被引量:7
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作者 刘奉银 刘国栋 +1 位作者 张瑞 张斌 《长江科学院院报》 CSCD 北大核心 2010年第7期76-78,共3页
以西安市某均质土坝为例,在上下游地层竖向边界不设置边界条件、加透水边界、加无限边界和无限边界加透水边界等条件下,计算了大坝和坝基渗流场,并进而采用Seep和Slope耦合,研究了边界条件的选取对渗流及边坡稳定的影响,得出如下结论:... 以西安市某均质土坝为例,在上下游地层竖向边界不设置边界条件、加透水边界、加无限边界和无限边界加透水边界等条件下,计算了大坝和坝基渗流场,并进而采用Seep和Slope耦合,研究了边界条件的选取对渗流及边坡稳定的影响,得出如下结论:竖向边界简单取为无限边界时计算结果与实际不符;加透水边界时计算的渗流量和下游坡脚处的水力坡降符合实测资料,安全系数大小也比较可信。该结论可为边界条件的选取提供参考。 展开更多
关键词 边界条件 边坡 渗流
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GEO-SLOPE软件在小型坝坡渗流稳定性分析中的应用 被引量:5
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作者 张家荣 《建筑技术》 北大核心 2016年第11期-,共3页
介绍Geo-Slope软件在坝坡渗流稳定分析中的应用,结合陕西省李家沟水库工程的应用,分析不同工况组合下计算结果,提出加固措施,结果表明Geo-Slope软件在坝坡渗流稳定分析中具有计算速度快、可靠性高等特点,应用效果良好。
关键词 Geo-slope软件 渗流稳定 除险加固
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Effect of slope gradient on the subsurface water flow velocity of sand layer profile 被引量:2
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作者 HAN Zhen CHEN Xiao-yan +3 位作者 HUANG Yu-han LUO Bang-lin XING Hang HUANG Yong-chao 《Journal of Mountain Science》 SCIE CSCD 2020年第3期641-652,共12页
Subsurface water flow velocity influences the hydrodynamic characteristics of soil seepage and the interaction between subsurface water flow and surface runoff during soil erosion and sediment transport.A visualized m... Subsurface water flow velocity influences the hydrodynamic characteristics of soil seepage and the interaction between subsurface water flow and surface runoff during soil erosion and sediment transport.A visualized method and equipment was adopted in this study to observe the subsurface water flow.Quartz sand was used as the test material of subsurface water flow and fluorescent dye was used as the indicator for tracing subsurface water flow.Water was supplied at the same flow discharge to the three parts at the bottom of the test flume,and the subsurface water flow were determined with four slope gradients(4°,8°,10°,and 12°).The results showed that the seepage velocity gradually increased with increasing slope gradient.The pore water velocity at different depths of sand layer profile increased with increasing slope gradient,whereas the thickness of the flow front gradually decreased.For the same slope gradient,the pore water velocity in the lower layer was the largest,whereas the thickness of the flow front was the smallest.Comparative analysis of the relationship between seepage velocity and pore water velocity at different depths of sand layer profile showed that the maximum relative difference between the measured pore water velocity and the computational pore water velocity at different depths of sand profile in the experiment was 4.38%.Thus,the test method for measuring the subsurface water flow velocity of sand layer profile adopted in this study was effective and feasible.The development of this experiment and the exploration of research methods would lay a good test foundation for future studies on the variation law of subsurface water flow velocity and the determination of flow velocity in purple soils,thus contributing to the improvement of the hydrodynamic mechanism of purple soils. 展开更多
关键词 SUBSURFACE WATER flow PORE WATER VELOCITY seepage VELOCITY slope gradient Sand layer
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Effect of freeze-thaw cycles on soil engineering properties of reservoir bank slopes at the northern foot of Tianshan Mountain 被引量:5
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作者 QIN Zi-peng LAI Yuan-ming +1 位作者 TIAN Yan ZHANG Ming-yi 《Journal of Mountain Science》 SCIE CSCD 2021年第2期541-557,共17页
The instability of soil bank slopes induced by freeze-thaw cycles at the northern foot of Tianshan Mountain is very common.The failure not only caused a large amount of soil erosion,but also led to serious reservoir s... The instability of soil bank slopes induced by freeze-thaw cycles at the northern foot of Tianshan Mountain is very common.The failure not only caused a large amount of soil erosion,but also led to serious reservoir sedimentation and water quality degradation,which exerted a lot of adverse effects on agricultural production in the local irrigation areas.Based on field investigations on dozens of irrigation reservoirs there,laboratory tests were carried out to quantitatively analyze the freeze-thaw effect on the soil engineering characteristics to reveal the facilitation on the bank slope instability.The results show that the softening characteristics of the stressstrain curves gradually weaken,the effective cohesions decline exponentially,the seepage coefficients enlarge,and the thermal conductivities decrease after 7 freeze-thaw cycles.The freeze-thaw effect on the specimens with low confining pressures,low dry densities and high water contents is more significant.The water migration and the phase transition between water and ice result in the variations of the soil internal microstructures,which is the main factor affecting the soil engineering characteristics.Sufficient water supply and the alternation of positive and negative temperatures at the reservoir bank slopes in cold regions make the water migration and phase transition in the soil very intensely.It is easy to form a large number of pores and micro cracks in the soil freezing and thawing areas.The volume changes of the soil and the water migration are difficult to reach a dynamic balance in the open system.Long-term freeze-thaw cycles will bring out the fragmentation of the soil particles,resulting in that the micro cracks on the soil surfaces are developing continuously.The soil of the bank slopes will fall or collapse when these cracks penetrate,which often happens in winter there. 展开更多
关键词 Mechanical properties seepage coefficient Thermal conductivity Micro structure Freeze-thaw cycles Reservoir bank slope
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Effects of freeze-thaw cycle and dry-wet alternation on slope stability
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作者 YaLing Chou LiYuan Sun +1 位作者 BaoAn Li XiaoLi Wang 《Research in Cold and Arid Regions》 CSCD 2019年第2期159-172,共14页
The typical loess on high slopes along the BaoLan High-speed Rail, China, was selected as the research object. The influence of the freeze-thaw cycle and dry-wet alternation on the shear-strength parameters of the uns... The typical loess on high slopes along the BaoLan High-speed Rail, China, was selected as the research object. The influence of the freeze-thaw cycle and dry-wet alternation on the shear-strength parameters of the unsaturated loess was investigated by laboratory experimental methods. Moreover, the temperature field, seepage field, and stability of slopes with different gradients were simulated under the effect of the freeze-thaw cycle and dry-wet alternation by using the geotechnical analysis software Geo-Studio. The research results showed(1) when the freeze-thaw cycle was repeated on the slope, with the frozen depth increasing, the melted depth did the same; besides, the closed loop of isotherms formed on the slope;(2) under the action of dry-wet circulation, the negative pore-water pressure and volumetric water content showed an upward tendency. However, owing to the different slope gradients, rainfall infiltration was not the same. As time went by, the differences of the negative pore-water pressure and volumetric water content between the slopes of different gradients continued to increase;(3) with the freeze-thaw cycle and dry-wet alternation increasing, the slope-safety factor decreased. Especially in the early period, the slope-safety factor changed remarkably. For slopes undergoing freeze-thaw action, the slope-safety factor was negatively correlated with the gradient. However, with regard to slopes undergoing dry-wet alternation, the result became more complex because the slope-safety factor was related to both seepage strength and slope grade. Accordingly, further research is needed to study the effect of seepage strength and slope grade on the stability of loess slopes. 展开更多
关键词 FREEZE-THAW action dry-wet ALTERNATION temperature FIELD seepage FIELD slope stability
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Stability of loess high-fill slope based on monitored soil moisture changes
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作者 XueLing Yong Yu Zhang +4 位作者 YunLong Hou BingBing Han Ning An Hui Zhang Ying Ma 《Research in Cold and Arid Regions》 CSCD 2023年第4期191-201,共11页
This paper aims to assess the influence of moisture content changes during rainfall on the stability of loess high-fill slopes by taking a loess high-fill slope in Lanzhou City as an example.First,according to the moi... This paper aims to assess the influence of moisture content changes during rainfall on the stability of loess high-fill slopes by taking a loess high-fill slope in Lanzhou City as an example.First,according to the moisture content monitoring data collected from a slope online monitoring system,direct shear tests were performed on soil samples of different moisture content to determine the relationship between the shear strength parameters and moisture content.Next,a coupled hydro-mechanical model with soil shear strength related to moisture content was established and used to analyze 16 working conditions with various rainfall intensities and durations for two cases:shear strength parameters from the site exploration report and those from this study.Finally,the results from the two cases were compared regarding the changes in stresses and displacements after rainfall infiltration to analyze the influence of moisture content on the stability of loess high-fill slopes.The conclusions are as follows:(1)Segmental relationship equations of cohesion and angle of internal friction were established for loess with various moisture content.(2)Under the conditions of different rainfall intensities,significant differences were observed in the trends of slope stress and displacement changes.(3)The slope displacement occurred in the shallow soil layer within about 12.5 m from the slope top,and the plastic strain concentrated in the soil layer within about 6 m from the slope top.(4)The results of slope stability analyses based on moisture content monitoring data are more in line with the observed. 展开更多
关键词 Rainfall infiltration seepage stress coupling LOESS High fill slope STABILITY
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Stability analysis of wharf slope under large water level difference in inland fiver
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作者 XU Jinling 《International English Education Research》 2016年第4期82-83,共2页
Abstract: Because of the complex topography in southwest region of China, the water level of the inland river has a large amplitude of variation which causes a frequent diversification of water content in the river s... Abstract: Because of the complex topography in southwest region of China, the water level of the inland river has a large amplitude of variation which causes a frequent diversification of water content in the river slope. The flow caused by the infiltration of the terminal slope stability will induce a great impact on the slope stability of wharf.. This paper uses an ideal elastic-plastic model and the Moore Coulomb yield criterion for numerical simulation. Through the b an k slop e stability of the overhead-type terminal s under the changes of water, we obtained the impact of all factors on the bank slope in the course of water lowering. It was found out that the impact from the cohesion of the geo-materials of the bank slope on the slope stability is greater than that from the internal friction angle. 展开更多
关键词 slope Three-Gorges reservoir area strength reduction seepage
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基于渗流作用下含断层的露天矿边坡稳定性的数值模拟研究 被引量:1
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作者 何锋 刘春学 《有色金属(矿山部分)》 2024年第2期70-75,87,共7页
为研究含断层露天边坡在渗流作用下的稳定性问题,采用FLAC3D数值模拟技术构建断层作用下的滑体力学模型,获得顺倾层状边坡分条稳定系数表达式,进而对渗流作用下含断层边坡稳定性进行数值模拟分析。对岩体强度的弹性模量、内聚力、内摩... 为研究含断层露天边坡在渗流作用下的稳定性问题,采用FLAC3D数值模拟技术构建断层作用下的滑体力学模型,获得顺倾层状边坡分条稳定系数表达式,进而对渗流作用下含断层边坡稳定性进行数值模拟分析。对岩体强度的弹性模量、内聚力、内摩擦角和岩体抗拉强度等4种影响因素进行敏感性分析,通过分析这4种因素在不同工况下边坡的位移、应力、应变和安全系数,得出了各参数的敏感性分析曲线。从敏感性分析曲线可知,岩体的内聚力对边坡稳定性的影响最大,弹性模量对边坡稳定性的影响最小。开挖不同阶段边坡稳定性的主要影响因素存在差别,其中,前期以断层为主,后期则逐渐转化为渗流作用。该研究为今后露天矿边坡稳定性分析提供了科学依据,对于边坡稳定性分析具有重大的工程实际意义。 展开更多
关键词 露天矿 边坡稳定 渗流 数值模拟 安全系数
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基坑提前排水围堰渗流稳定及排水策略研究
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作者 吴都督 赵银超 +1 位作者 曾伟 向金虎 《中国农村水利水电》 北大核心 2024年第5期243-248,共6页
围堰渗流及边坡稳定关系到围堰自身稳定以及基坑能否及时形成干地施工条件,极大影响到主体建筑物的工期。依托于澜沧江TB水电站围堰施工与基坑排水工作,对围堰防渗墙各施工阶段基坑水位骤降条件下的堰体渗流稳定与边坡稳定性进行了研究... 围堰渗流及边坡稳定关系到围堰自身稳定以及基坑能否及时形成干地施工条件,极大影响到主体建筑物的工期。依托于澜沧江TB水电站围堰施工与基坑排水工作,对围堰防渗墙各施工阶段基坑水位骤降条件下的堰体渗流稳定与边坡稳定性进行了研究。结果表明:随着防渗墙的施工逐步完成,围堰体浸润线的再次稳定用时逐步减小,且基坑内外水位差更大的条件下浸润线稳定用时更长;在围堰防渗墙处于一期槽施工完成二期槽泥浆固壁条件下,若能控制基坑单次水位骤降不超过0.9 m,则堰体边坡能保持稳定,此时可允许基坑提前排水。在此基础上,对TB水电站基坑提前排水策略及方案进行了研究。研究结果可为类似工程提供参考。 展开更多
关键词 围堰 渗流稳定 边坡稳定 基坑排水
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土质边坡非饱和渗流及其稳定性研究
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作者 何玉琼 赵鋆嬉 +2 位作者 张家明 唐磊 董文杰 《辽宁工程技术大学学报(自然科学版)》 CAS 北大核心 2024年第4期408-416,共9页
为研究降雨过程及雨停后土质边坡整体渗流场及稳定性变化情况,运用FLAC^(3D)软件对其进行数值模拟分析,并采用室外降雨模拟试验验证模拟结果。研究结果表明:降雨入渗过程中从坡脚开始破坏,主要表现为浅层滑动;降雨停止初期,雨水会继续下... 为研究降雨过程及雨停后土质边坡整体渗流场及稳定性变化情况,运用FLAC^(3D)软件对其进行数值模拟分析,并采用室外降雨模拟试验验证模拟结果。研究结果表明:降雨入渗过程中从坡脚开始破坏,主要表现为浅层滑动;降雨停止初期,雨水会继续下渗,湿润峰深度持续下移,安全系数仍有下降的趋势;雨停中后期,随着土体水分的减少,安全系数开始回升;降雨强度与坡度的增大对边坡稳定性不利。研究结论为解决非饱和土流-固耦合问题提供新思路。 展开更多
关键词 土质边坡 非饱和渗流 数值分析 稳定性分析 FLAC^(3D)软件 降雨
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The Effect of Rainfall Duration on Stability of High Fill Slopes
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作者 LIU Zengrong SONG Tao 《土工基础》 2012年第5期69-71,共3页
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降雨条件下堆积体饱和-非饱和渗流场分析与稳定性演化 被引量:1
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作者 李宏伟 高维鸿 胡冉 《中国农村水利水电》 北大核心 2024年第8期150-159,共10页
降雨是工程区域堆积体边坡失稳的重要诱因,如何评价降雨条件下饱和-非饱和渗流对堆积体边坡稳定性的影响,其挑战在于准确获取堆积体的非饱和渗流参数。以梅家台滑坡典型治理工程为研究对象,采用饱和-非饱和有限元分析,并基于监测资料对... 降雨是工程区域堆积体边坡失稳的重要诱因,如何评价降雨条件下饱和-非饱和渗流对堆积体边坡稳定性的影响,其挑战在于准确获取堆积体的非饱和渗流参数。以梅家台滑坡典型治理工程为研究对象,采用饱和-非饱和有限元分析,并基于监测资料对渗流场动态反演,准确获得了非饱和水力参数和边界水位,进而采用极限平衡法对滑坡稳定性演化分析。结果表明:坡体后缘补给水位在692.0~694.5 m内动态变化,在后缘补给和降雨入渗作用下坡体内地下水位变幅为3.0~12.0 m;排水措施实施后地下水位下降9.0 m,且变幅降为1.0~5.5 m,同时在暴雨条件下,滑坡中部堆积薄弱带暂态饱和区范围减小84.5%,坡脚饱和区也被抑制到一号公路以下,发挥了很好的排水降压作用;滑坡存在沿中部薄弱带浅层滑动、沿下部前缘浅层滑动、沿老滑带从一号公路剪出3种失稳模式,降雨入渗时稳定性明显下降,稳定系数分别降低至0.82、0.99、0.98,小于稳定安全系数1.05,综合治理措施下,稳定系数分别增加0.28、0.13、0.19,目前稳定系数分别为1.10、1.12、1.17,各个失稳模式稳定系数均大于稳定安全系数,滑坡处于稳定状态。研究成果可为类似工程治理设计和渗流稳定分析提供参考。 展开更多
关键词 降雨入渗 饱和-非饱和渗流 排水措施 边坡稳定 梅家台滑坡
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强降雨作用下尾水边坡非饱和渗流特征及稳定性分析 被引量:2
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作者 牛天武 杨东升 +2 位作者 雷艳 龚盛 宋腾 《西北水电》 2024年第1期73-78,共6页
为探究抽水蓄能电站尾水边坡在强降雨作用下的稳定性,基于饱和-非饱和渗流理论模拟了强降雨条件下尾水边坡渗流场的分布及变化情况,并结合渗流计算结果,利用强度折减法对降雨条件下边坡稳定性进行了分析。结果表明:当降雨强度超过土体... 为探究抽水蓄能电站尾水边坡在强降雨作用下的稳定性,基于饱和-非饱和渗流理论模拟了强降雨条件下尾水边坡渗流场的分布及变化情况,并结合渗流计算结果,利用强度折减法对降雨条件下边坡稳定性进行了分析。结果表明:当降雨强度超过土体的饱和渗透系数时,坡脚和坡表下部率先出现暂态饱和区域,随着降雨历时的增加,润湿锋不断向坡体内部移动;长期降雨期间,边坡稳定性系数的变化主要由两个因素决定,一是孔隙水压力增加导致的有效应力减小,二是表层土体饱和容重增加导致的下滑力增加;降雨过程中边坡的稳定性系数不断减小,在降雨3d后稳定性系数发生突变;降雨前期边坡潜在滑面为弧形,随着降雨历时的增加滑面深度变浅,降雨后期边坡潜在滑面表现为沿润湿峰分布的直线形滑面,且随降雨持续作用,滑面随润湿锋向坡体内部移动。 展开更多
关键词 边坡工程 降雨入渗 非饱和渗流 渗透稳定性 数值模拟
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不同降雨类型循环下二元边坡渗流场及稳定性分析 被引量:1
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作者 查文华 杨晗 +2 位作者 许涛 赵志豪 黄仁贵 《水力发电》 CAS 2024年第7期31-37,共7页
为研究不同降雨条件对二元边坡的影响,以福建某公路边坡为例,基于饱和-非饱和渗流理论,利用Geo-Studio软件,模拟不同类型降雨对二元边坡渗流场和稳定性的影响,探讨不同降雨类型循环条件下二元边坡的渗流场和安全系数的变化规律。结果表... 为研究不同降雨条件对二元边坡的影响,以福建某公路边坡为例,基于饱和-非饱和渗流理论,利用Geo-Studio软件,模拟不同类型降雨对二元边坡渗流场和稳定性的影响,探讨不同降雨类型循环条件下二元边坡的渗流场和安全系数的变化规律。结果表明,降雨引起的孔隙水压力变化在边坡表层土体和内部岩层之间存在显著差异,土-岩接触面存在潜在滑动面;总降雨量相同时,表层土体孔隙水压力变化曲线呈现不同变化规律,前期型呈上凸型,中期型、均匀型都呈直线型,后期型呈下凹型;下部岩层坡顶、坡面处孔隙水压力变化曲线在降雨周期前期不变,在后期突然增大升至饱和状态,坡脚处岩层的孔隙水压力变化趋势与表层土体一致;安全系数变化与降雨时间分布一致,并具有明显的滞后性;降雨最不利时,潜在滑动面由边坡内部上移到土-岩接触面处及内部岩层接触面处。 展开更多
关键词 降雨入渗 二元边坡 稳定性分析 饱和-非饱和渗流 潜在滑动面 安全系数
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细粗粒覆盖层对膨胀土边坡防渗效果数值研究 被引量:1
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作者 权全 邱金伟 +4 位作者 胡波 李涛 刘明华 宋诚 吴昊 《人民长江》 北大核心 2024年第7期221-228,共8页
为了研究由一层细粒土层下覆一层粗粒土层组成的毛细阻滞护坡结构对膨胀土边坡防渗效果的影响,采用初应变法将膨胀土中湿度应力以类似温度应力场的形式施加到土体上,通过数值软件实现对膨胀土边坡吸湿膨胀的数值模拟,将等效塑性应变完... 为了研究由一层细粒土层下覆一层粗粒土层组成的毛细阻滞护坡结构对膨胀土边坡防渗效果的影响,采用初应变法将膨胀土中湿度应力以类似温度应力场的形式施加到土体上,通过数值软件实现对膨胀土边坡吸湿膨胀的数值模拟,将等效塑性应变完全贯通作为边坡稳定性的判别准则。数值模拟结果表明:毛细阻滞护坡结构层形成强透水层,能有效防止降雨入渗,达到较好的护坡效果;0.5 m厚细粒土层+0.2 m厚粗粒土层组成的毛细阻滞结构护坡效果与1.5 m水泥改性土护坡结构相当。毛细阻滞生态护坡结构对膨胀土边坡有较好的护坡效果。研究成果可以为相关膨胀土边坡防护提供理论和设计依据。 展开更多
关键词 粗粒土覆盖层 膨胀土边坡 毛细阻滞护坡结构 吸湿膨胀 数值模拟 防渗效果
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耦合渗流-变形的数值流形法裂隙岩质 边坡稳定性分析
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作者 屈小磊 张云开 +2 位作者 陈悠然 陈悠扬 戚承志 《岩土力学》 EI CAS CSCD 北大核心 2024年第1期313-324,共12页
岩石裂隙渗流问题作为影响岩石边坡失稳的重要因素吸引了越来越多研究者采用不同的数值方法模拟其力学行为。提出了一种基于渗流-变形耦合模型的数值流形方法,并相应地讨论了岩体裂隙网络中地下水的流动、渗透压力和岩石变形的耦合效应... 岩石裂隙渗流问题作为影响岩石边坡失稳的重要因素吸引了越来越多研究者采用不同的数值方法模拟其力学行为。提出了一种基于渗流-变形耦合模型的数值流形方法,并相应地讨论了岩体裂隙网络中地下水的流动、渗透压力和岩石变形的耦合效应。基于最小能量原理,分别推导渗流条件下单元边界流体压力和系统的整体平衡方程,以及块体接触算法求解任意岩石裂缝的局部安全系数。通过一系列验证实例对所提出的数模模型进行检验,验证了该数值模型的鲁棒性和有效性。利用该方法模拟了一个岩石边坡由于渗流作用而发生的坍塌事故,再现了岩石边坡的破坏过程。模拟结果表明,过大的水力压力导致垂直裂缝张开,增加岩体变形量,最终导致边坡破坏。研究表明,该方法在模拟大规模工程问题方面具有很大的潜力。 展开更多
关键词 数值流形法 裂隙渗流 岩石边坡稳定 渗流-变形耦合
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伊洛瓦底江河道水位及微型木桩对土质边坡变形和稳定的影响
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作者 徐超群 甘磊 +5 位作者 吴志刚 胡继峰 李健 齐建飞 甘元楠 刘源 《水利水电科技进展》 CSCD 北大核心 2024年第3期88-94,共7页
结合饱和-非饱和渗流和固结理论,构建了伊洛瓦底江干流某土质边坡三维渗流分析模型,研究了不同水位降幅和降速工况下边坡稳定性变化规律,评价了微型木桩对边坡的加固效果。结果表明,河道水位降速越快、汛期水位越高时,水位下降过程中坡... 结合饱和-非饱和渗流和固结理论,构建了伊洛瓦底江干流某土质边坡三维渗流分析模型,研究了不同水位降幅和降速工况下边坡稳定性变化规律,评价了微型木桩对边坡的加固效果。结果表明,河道水位降速越快、汛期水位越高时,水位下降过程中坡面附近的渗透坡降越大,安全系数越低。布设微型木桩群,当木桩群高度为2、4、6 m时,其边坡稳定安全系数相较无加固情况分别提高了4.50%、9.00%、39.60%,说明微型木桩群的加固效果较好,具有一定推广价值。 展开更多
关键词 微型木桩 河道水位 渗流 边坡稳定 伊洛瓦底江
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尾矿坝渗流对露天采场高陡边坡稳定性影响分析
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作者 赖渊平 于正兴 《矿产勘查》 2024年第S01期36-42,共7页
为分析尾矿坝渗流作用对露天采场高陡边坡稳定性影响,本文选取西藏某露天矿山为研究对象,通过室内实验分析和数值模拟结合的方式,采用GEO-studio分析软件,对边坡渗流场进行计算,最终得到尾矿坝渗流影响前后典型剖面稳定性变化。研究结... 为分析尾矿坝渗流作用对露天采场高陡边坡稳定性影响,本文选取西藏某露天矿山为研究对象,通过室内实验分析和数值模拟结合的方式,采用GEO-studio分析软件,对边坡渗流场进行计算,最终得到尾矿坝渗流影响前后典型剖面稳定性变化。研究结果表明:尾矿库坝渗流作用下,采场边坡浸润面发生一定变化,静水压力增长,对边坡稳定性存在负面影响。尾矿库排放至最终位置时,典型剖面潜在滑动面范围出现一定变化,滑动面下端向坡底方向扩展。研究成果可为尾矿库渗流作用影响下的高陡边坡工程提供参考。 展开更多
关键词 尾矿坝 渗流 数值模拟 高陡边坡 边坡稳定性
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