Through applying above theories and methods , safety monitoring model of temporary shiplock and ship lift dam sections in three - gorge project is studied . varying rule of dam displacement during construction period is analyzed by viscoelastic finite element , and safety monitoring model of dam displacement and stress during construction period is founded . rationality and validity of the model is validated ( 4 )应用前述的理论和方法,对三峡工程临时船闸坝段、升船机坝段的施工期安全监控模型进行了研究;对施工期坝体位移变化规律进行了粘弹性有限元分析,同时建立了大坝施工期位移和应力的安全监控模型,据此对模型的合理性和有效性进行了验证。
The study shows that the most likely sliding path is located shallowly under the rock bed and the sliding path runs close to a line from tensile area at dam heel to dam toe . staircase sliding paths buried less than 14 meters bellow dam heel are also dangerous , but they are not the most dominant 研究表明,最危险滑移路径处于坝基面以下浅层,滑移通道为从上游坝踵拉裂区沿近直线方式向下游坝趾滑出;正常蓄水位时, 9b 、 4b坝段最危险滑移路径安全系数分别为k _ s = 4 . 15 、 3 . 05 。
The network can control the opening , shutting and surveillance the circulate of the eight gates , which stand in different positions , and make the system satisfied the various requests of that water power station ' s production , and still guaranteed the system had very advanced at the same time 通过该监控网络,可实现对该水电站分居于八个不同坝段的闸门的运行及运行状态的控制与监视,从而使得该监控系统在满足水电站实际生产的各项要求,同时还保证了该系统具有相当的先进性。
Mathematics statistic model of the main observation variables and horizontal displacement hybrid model of typical monolith of huangtankou concrete gravity dam are established . through model analysis and parameter inversion , taking into account of water level and temperature , deformation monitoring control index of typical monolith is determined by the improved method of probability . the primary contents are as follows : 1 建立了黄坛口混凝土重力坝主要观测量的数理统计模型和典型坝段水平位移混合模型等,通过对各数学模型的分析和参数反演,综合考虑水位温度采用改进小概率法拟定了典型坝段水平位移的监控指标,得到一些有益的结论,其主要内容如下: 1
The working stress state and the stability of typical blocks of baise rcc gravity dam are computed and studied based on the 3d non - linear finite element method ( fem ) and rigid body - spring element method ( rbsm ) . the analysis of failure process , failure mode , failure mechanism of the dam are studied with overload method and combined method in which rock strength parameters are decreased while water load is overloaded to a certain degree . in this paper , the following works are done 本文充分发挥有限单元法和刚体弹簧元法的优点,对百色rcc重力坝典型坝段( 9b 、 4b )地基稳定安全性进行数值分析和计算,从超载法、综合法等不同角度,对坝基稳定性开展研究,分析坝体和坝基破坏过程、破坏形态和破坏机理,确定坝基可能的滑动路径和滑移模式,评价工程的稳定安全性。
( 4 ) evaluation of feasibility of planned dam types in course of dam construction and after storage . the main findings of this research are as follows : the researching theory and method system of engineering geological feasibility study of high - dam construction are summarized in this thesis . furthermore , the study process has been divided into five stages , namely are planning , comparison of dam section , comparison of dam site , comparison of dam axes and special - purpose engineering study 通过上述研究,本文取得了如下主要成果:系统归纳、总结了高坝建设工程地质适宜性评价的理论和方法,并将整个适宜性评价划分为规划选点、坝段坝址比选、坝线坝型比选、专项工程地质研究和技施设计工程地质研究五个阶段,提出了各个阶段的适宜性评价目标和决定因素。
Using these theories , the physical cause of continual left displacement of longyangxia dam ; especially 4th dam section is analyzed . ( 4 ) accidents of some arch dam show that dam failure mainly caused by crack or failure of their base rock , which is directly related with seepage in the rock 应用上述理论,解析了龙羊峡大坝向左岸位移的物理成因,尤其是4 ~ #坝段在1991年以前切向位移显著向左岸位移的疑点,这对长期困扰该坝安全运行的疑点作出了科学解析,具有重要的实用价值。
Three - dimension finite element floating mesh method is used to calculate the temperature field and thermal stress of 6aa roller compacted concrete gravity dam section and f6 fault concrete tuck in this paper . the basic theories adopted include heat conduction theory , elastic theory and corresponding finite element calculation equation 本文用三维有限元浮动网格法对6aa坝段及基础部位f6断层混凝土塞的施工过程进行温度场和温度应力仿真计算,计算的基本理论是热传导理论和弹性理论以及相应的有限元计算公式。
During the construction of the monoliths no . 5 and no . 6a at the baise rcc gravity dam , the distributed optical fiber sensing system was used to measure the three dimensional temperature field of the concrete structure so as to improve the construction quality and benefit the safe operation of the dam 摘要结合广西百色碾压砼重力坝5号、 6a号坝段施工过程,以分布式光纤温度测量系统为手段,形成了两个坝段砼结构三维温度场,不仅提高了施工质量,同时对今后大坝的安全运行十分有利。
Based on rigid body method and finite element method , the deep stability against sliding of yunfeng dam was analyzed in details . the results show that its safety factor along the fault is on the low side . on account of some parameters in the computation modules were indeterminate , the results obtained could not reflect the real safety situation of yunfeng dam 在对其空间结构进行细致分析的基础上,提出将51 ~ #和52 ~ #两个坝段合并在一起建立物理模型,综合考虑各阻滑面和侧面基岩的抗剪断强度的作用,分别按刚体法和有限元法对其抗滑稳定进行复核计算。