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| 1 | 基于非稳定渗流过程的岩体渗透特性反演分析显示文摘考虑岩土体渗流场在工程施工及运行过程中的动态特征,依据水头和流量2类测点的实测时间序列数据,建立基于正交设计、非稳定渗流正分析、BP神经网络和遗传算法相结合的非稳定渗流场反演分析方法,在一定程度上体现了多目标优化、全过程反演的特点,较好地解决了岩体渗透系数反分析的唯一性与可靠性问题。为了避免在反问题中由于利用水头和流量2种类型观测资料所带来的量纲问题,将水头和流量时间序列数据误差项归一化后构造量纲一化的目标函数,并在目标函数中引入权系数w,从而避免寻优时某一类型观测信息占优。针对长河坝水电站基坑施工期涌水问题,根据施工期各渗压计、基坑渗漏量实测时间序列资料和上游河水变化过程曲线,采用上述方法反演了坝基岩土体的渗透系数。反演分析结果表明:渗压、流量测点的实测和计算时间序列数据吻合较好,反演给出的各岩土体渗透系数与现场钻孔压水试验得到的岩体渗透特性分级相符,从而论证了该反演分析方法的可行性和反演结果的可靠性。研究结果为进一步评价大坝正常蓄水后坝基防渗体系的有效性提供了依据。 | 刘武 陈益峰 胡冉 周创兵 | 2015 | 岩石力学与工程学报2015，34，2： | 23 |
| 2 | 非稳定渗流问题的变分不等式方法及工程应用显示文摘Signorini型变法不等式方法是求解有自由面渗流问题的一种新方法,该方法理论基础严密,并克服了渗流溢出点的奇异性。通过给出一种含有Signorini型互补条件的抛物变分不等式(PVI)方法,将Signorini型变法不等式方法从稳定渗流分析拓展到非稳定渗流分析,并给出了其有限元数值计算格式和数值模拟流程。在此基础上,针对已有的砂槽模型试验数据,通过对比研究基于PVI方法的非稳定渗流分析成果和饱和-非饱和渗流分析结果,论证了该方法的有效性,并讨论了该方法的适用条件。最后,应用上述方法对含有复杂渗控措施的水布垭工程开展了非稳定渗流分析,通过与大坝坝体、趾板、灌浆廊道围岩、地下厂房围岩等部位实测渗压数据和坝后量水堰实测流量数据的对比分析,表明计算结果很好地反映了水布垭工程厂、坝区岩土体在蓄水及运行过程中渗流场的变化规律,系统揭示了混凝土面板、防渗帷幕、排水孔幕及排水廊道等工程渗控措施的渗流控制效应。研究成果对于含有复杂渗控措施、并具有稳定补给源的岩土工程非稳定渗流分析具有指导意义。 | 胡冉 陈益峰 周创兵 李典庆 | 2011 | 水动力学研究与进展(A辑)2011，26，2： | 6 |
| 3 | Characterization of transient groundwater flow through a high arch dam foundation during reservoir impounding显示文摘Even though a large number of large-scale arch dams with height larger than 200 m have been built in the world, the transient groundwater flow behaviors and the seepage control effects in the dam foundations under difficult geological conditions are rarely reported. This paper presents a case study on the transient groundwater flow behaviors in the rock foundation of Jinping I double-curvature arch dam, the world's highest dam of this type to date that has been completed. Taking into account the geological settings at the site, an inverse modeling technique utilizing the time series measurements of both hydraulic head and discharge was adopted to back-calculate the permeability of the foundation rocks,which effectively improves the uniqueness and reliability of the inverse modeling results. The transient seepage flow in the dam foundation during the reservoir impounding was then modeled with a parabolic variational inequality(PVI) method. The distribution of pore water pressure, the amount of leakage, and the performance of the seepage control system in the dam foundation during the entire impounding process were finally illustrated with the numerical results. | Yifeng Chen Jiamin Hong Shaolong Tang Chuangbing Zhou | 2016 | Journal of Rock Mechanics and Geotechnical Engineering2016，8，4： | 6 |
| 4 | 地下厂房围岩渗控效应精细模拟与评价显示文摘我国西南地区河谷深切,坝址区地貌及地质条件复杂,地下厂房的位置往往离库区较近,水库蓄水后,地下厂房围岩渗流特性将成为影响工程安全和正常运行的重要因素之一.为减小厂区渗漏并改善厂房围岩的渗透稳定性,工程设计采取防渗帷幕、排水孔幕和排水廊道等渗流控制措施.采用子结构、变分不等式和自适应罚函数相结合的方法(简称SVA方法),开展了牙根二级水电站厂区整体三维渗流场分析,评价了厂区围岩渗流控制方案的合理性,并论证其优化的可能性.研究结果表明:厂区防渗排水系统的渗流控制效果显著,防渗排水系统设计方案总体上是合理、有效的;厂区上部排水系统对于以库水渗漏为主的渗流控制不起作用,高高程排水孔幕的间距可适当放宽;厂区副排水孔幕对减少厂区各洞室渗漏量、降低厂区围岩孔隙水压力并改善围岩的稳定性具有显著作用. | 郑华康 陈益峰 洪佳敏 周嵩 周创兵 | 2014 | 天津大学学报(自然科学与工程技术版)2014，47，9： | 6 |
| 5 | 排水砂槽渗流试验与Signorini型变分不等式方法验证显示文摘排水是岩土体及工程构筑物渗流控制的主要措施之一,其实质是通过在渗流域内形成潜在溢出边界或低水位边界而实现渗流控制的。在排水渗控条件下,渗流场往往具有强烈的边界非线性特征,Signorini型变分不等式方法从理论上为稳定和非稳定排水渗流问题提供了有效的分析方法,但其实际效果还需要得到试验的验证。通过开展含5个排水廊道的排水砂槽模型试验,研究了复杂排水条件下砂土渗流的基本规律,并通过试验数据与数值计算成果的对比分析,论证了Signorini型变分不等式方法的有效性和正确性。试验结果表明,在稳定渗流条件下,排水砂槽上游侧3个排水廊道对渗流控制起主导作用,而下游侧2个廊道则失去排水功能,数值计算与试验成果吻合较好;在非稳定渗流条件下,受测压管精度、砂样均匀性和毛细效应的影响,数值计算与试验成果存在一定偏差,但也较好地揭示了复杂排水条件下砂槽中的非稳定渗流特征。排水砂槽试验结果验证了Signorini型变分不等式方法的有效性和正确性,为复杂排水条件下岩土体及工程构筑物的渗控结构优化设计提供了有效的分析手段。 | 白正雄 陈益峰 胡冉 张勤 周创兵 | 2012 | 岩土力学2012，33，9： | 5 |
| 6 | A generalized multi-field coupling approach and its application to stability and deformation control of a high slope显示文摘Human activities,such as blasting excavation,bolting,grouting and impounding of reservoirs,will lead to disturbances to rock masses and variations in their structural features and material properties.These engineering disturbances are important factors that would alter the natural evolutionary processes or change the multi-field interactions in the rock masses from their initial equilibrium states.The concept of generalized multi-field couplings was proposed by placing particular emphasis on the role of engineering disturbances in traditional multi-field couplings in rock masses.A mathematical model was then developed,in which the effects of engineering disturbances on the coupling-processes were described with changes in boundary conditions and evolutions in thermo-hydro-mechanical(THM) properties of the rocks.A parameter,d,which is similar to damage variables but has a broader physical meaning,was conceptually introduced to represent the degree of engineering disturbances and the couplings among the material properties.The effects of blasting excavation,bolting and grouting in rock engineering were illustrated with various field observations or theoretical results,on which the degree of disturbances and the variations in elastic moduli and permeabilities were particularly focused.The influences of excavation and groundwater drainage on the seepage flow and stability of the slopes were demonstrated with numerical simulations.The proposed approach was further employed to investigate the coupled hydro-mechanical responses of a high rock slope to excavation,bolting and impounding of the reservoir in the dam left abutment of Jinping I hydropower station.The impacts of engineering disturbances on the deformation and stability of the slope during construction and operation were demonstrated. | Chuangbing Zhou Yifeng Chen Qinghui Jiang Wenbo Lu | 2011 | Journal of Rock Mechanics and Geotechnical Engineering2011，3，3： | 5 |
| 7 | Towards an optimization design of seepage control:A case study in dam engineering显示文摘High dams generally suffer from higher seepage risks in their foundations, and seepage control is an important technology for limiting the amount of leakage and improving the stability of the foundations. In this study, a procedure was proposed for optimization design of seepage control system in large-scale hydropower projects, which relies on sufficient characterization of site conditions and proper quantification of the performance of the seepage control system. The proposed procedure was applied to the design of seepage control system in the Mengdigou Hydropower Station consisting of a double-curvature arch dam201 m in height. An optimized layout of the seepage control system, including the extended length of grout curtain, the rows of grouting holes and the spacing of drainage holes, was suggested. The proposed procedure provides a guide with lower risk and higher confidence for performance assessment and optimization design of seepage control systems in high dam engineering. | LI Xing CHEN YiFeng HU Ran YANG ZhiBing | 2017 | Science China(Technological Sciences)2017，60，12： | 3 |
| 8 | 丹巴水电站长引水隧洞涌水量预测显示文摘拟建的丹巴水电站引水系统位于丹巴县境内大渡河左岸,该区域河谷陡峻,地质条件复杂,引水系统的渗漏及渗透稳定性是工程建设的关键技术问题之一.依据工程地质与水文地质资料,建立了研究区30.6km范围的有限元模型,并基于工程区的补给、径流、排泄特征,开展了天然渗流场的反演分析.在此基础上,研究了施工期与运行期长引水隧洞的涌水量的沿线分布特征,并与多种涌水量预测值进行了对比研究.研究表明:引水系统总涌水量约为132 875m3/d,隧洞沿线单宽涌水量在石英岩区域较大,有限元结果与经验公式结果较为吻合,证明了计算结果的可靠性.研究成果对工程建设具有一定参考价值. | 陈东斌 陈益峰 洪佳敏 王敏 唐文嘉 | 2017 | 武汉大学学报(工学版)2017，50，2： | 3 |
| 9 | 国外某抽水蓄能电站三维渗流分析显示文摘国外某抽水蓄能电站工程区地下水丰富,地下厂区各洞室位于天然地下水位以下。在电站施工与运行过程中,地下厂房围岩的渗流特性将成为影响工程安全和正常运行的重要因素之一。综合工程地质条件与地下厂房布置特征,建立厂区三维有限元模型,采用稳定渗流分析方法,研究了运行期与施工期地下厂区围岩的渗流场分布特征,并对各洞室的渗漏流量进行了预测,为工程建设提供合理建议。 | 洪佳敏 刘明华 倪绍虎 吕慷 郑海圣 | 2021 | 大坝与安全2021，，4： | 1 |
| 10 | 牙根二级水电站坝区渗流场分析与渗控效应评价显示文摘牙根二级水电站坝址区河谷狭窄,岸坡陡峻,地质条件复杂。水库蓄水后,坝体、坝基及两岸绕坝渗流将成为影响工程安全和正常运行的重要因素之一。综合分析地形地貌、地质构造以及防渗排水方案的特点,建立坝区三维有限元模型,采用子结构、变分不等式和自适应罚函数相结合的方法(简称SVA方法),结合典型挡水坝段与坝区整体渗流场分析成果,研究了坝区渗流场分布特征,分析了排水孔幕间距以及碾压混凝土层间渗透性对渗流场的影响,并对防渗排水措施的渗流控制效率进行了评价,从而为工程建设提供合理的建议。研究表明,坝区渗流控制措施布置合理,防渗排水效果显著;排水孔幕的布置对坝基扬压力起控制性作用;碾压混凝土渗流特性的各向异性对大坝渗流自由面的性态有显著影响。 | 唐文嘉 王敏 郑华康 洪佳敏 李毅 | 2015 | 中国农村水利水电2015，，5： | 1 |
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