堤防工程三维随机渗流场理论及研究
摘要:给出分析各向异性非均质稳定随机渗流场问题的三维有限元模型;结合实际工程问题,统计分析长江荆南干堤土性参数的分布特征,通过Kolomogorov-Smirnov统计检验表明,渗透系数呈高斯分布假设可以接受;通过对长江荆南干堤随机渗流场的三维有限元统计模拟的数值分析,研究长江荆南干堤渗流场的各种随机特性,并进一步对随机模拟结果进行统计检验,验证模拟结果的合理性;在实际的分析研究中把上下游水位的随机波动引入三维有限元的随机分析模型,分析上下游水位的变异性对渗流场矢量的随机干扰和边界条件的随机性对随机渗流场分析结果变异性的影响。在此基础上进一步考虑施加诸如垂直截渗墙、下游导渗沟等抗渗措施后,它们作为复杂边界条件的扰动,在与场内土性参数的变异性共同影响下,对渗流场水头势分布的随机干扰特性,并与相应的确定性稳定渗流场问题的结果对比,证实随机渗流场研究的必要性、可行性及实用性。实现了对长江荆南干堤的三维渗流场的较为全面的随机场模拟及特性分析,分析得到的结论通过统计检验并结合实测工程数据对照证明是可靠的,所研制的程序是适用的。
Abstract:Since the complicacy of practical seepage problem effected by various random factors, the three dimensional simulation and analysis for stochastic seepage field has an important meaning in engineering applications. The three-dimensional anisotropic heterogeneous steady random seepage model and designed program are developed on the basis of Finite Element Method. A statistical analysis of stratum soil characteristics and geological columns sampled from the main embankment of Yangtze Rive in southern Jingzhou zone of China is carried based on practieal engineering projects. The statistical hypothesis of Gaussian probability distribution for random permeability tensors of soils to be submitted into the stochastic seepage field simulation was verified that this assumption would be accepted by the statistical testing based on Kolomogorov-Smirnov theory. Various statistical characteristics and random natures in random seepage fields of the main embankment of Yangtze Rive in southern Jingzhou zone of China were investigated by numerical analysis for stochastic seepage fields simulations using three dimensional Finite Element Method as well as the rationality of simulated stochastic results and the developed model were also examined through statistical testing. Especially, the random variation of upstream and downstream water level as a stochastic boundary condition was taken into account of three-dimensional finite element model in practical analysis for the random seepage field simulations in order to describe disturbed effects of the boundary randomness due to variability of downstream and upstream water level over variabilities of simulated results presented by vector series of the random seepage field. Furthermore, the function of some safeguards to set up against the seepage problem, such as sheet-pile breakwater and eatch-water,as the turbulence of complex boundary condition together with the effects of variability of soil permeability have been analyzed for description of influence of them on the hydraulic potential distributed in the random seepage field and compared with the result obtained by determinate analysis for the corresponding steady seepage field problem.That presents the necessity,feasibility and practicability of employing stochastic studies in seepage field problems.The developed method provides a more detail and full stochastic algorithm to characterize and analysis for three dimensional random seepage field problems.The conclusion of simulated analysis is reliable in comparison with pertained stochastic checking and measured data from practical engineering.
中文标题：
堤防工程三维随机渗流场理论及研究
3 Dimensional Random Seepage Field Theory and Researching for Levee Construction
作者：
王亚军1,吴昌瑜2,任大春2
Wang Yajun1,Wu Changyu2,Ren Dachun2
作者简介:王亚军,1976年生,男,山西平定人,浙江大学岩土工程研究所博士生,主要从事岩土工程力学的研究工作。E-mail:aegis68004@yahoo.com.cn
通讯地址：
1. 浙江大学软弱土与环境土工教育部重点实验室, 浙江杭州 310027; 2. 长江科学院, 湖北武汉 430010
1.GeotechnicalEngineeringInstituteofZhejiangUniversity,HangzhouZhejiang310027; 2.ChangjiangScientificInstitute,WuhanHubei430010China
中图分类号:TU457
出版物：岩土工程技术
收稿日期:2008-01-21
网络出版日期:2021-07-07
关键词:各向异性随机渗流场,渗流场的三维有限元分析,Monte Carlo模拟,非均匀稳态渗透系数,水头边界随机扰动
Key words:anisotropic random seepage field,three dimensional seepage finite element method,Monte Carlo simulation,inhomogeneous permeability
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