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- The problem of thermal stress and a need for temperature control in the mass concrete construction also occur in the roller compacted concrete dams(RCCD). 大体积混凝土的温度应力问题与温度控制要求在碾压混凝土坝中同样存在。
- mass concrete dam 大体积混凝土坝
- The reliability optimum design of temperature control for mass concrete dams 混凝土坝温度控制的可靠性最优化设计
- Research Development of Safety Analysis for High Concrete Dam. 高混凝土坝安全分析方法的研究进展。
- With concrete dam ageing, the change takes place in it's deformation modulus. 随着坝龄的增长,混凝土大坝的变形模量将发生变化。
- The thermo stresses in the concrete dam will produce because of changing of weather temperatures. 由于气温的交替变化,处于寒区的混凝土大坝必然产生温度应力。
- Therefore it provides a new effective way for discerning elastic parameters of concrete dam body and rocky foundation. 从而为识别混凝土坝体和岩石基础弹性常数提供了一条新的有效途径。
- The physical equation and elastic matrix for the rolled concrete dam is deduced based on the anisotropic elasticity. 由各向异性体的物理方程推导了碾压混凝土的物理方程和弹性矩阵。
- The application of FEM to the temperature and creep of the mass concrete structure is studied in this thesis. 本文就有限单元法在大体积混凝土结构温度及徐变方面的研究与应用做了较系统的研究,主要完成了如下工作:
- The conclusion shows the characteristics of RCD concrete dam stress field in the very cold area and it will be helpful for design and construction. 仿真计算结果揭示了北方寒冷地区碾压混凝土坝温度应力的特征，从而为混凝土入仓温度控制标准的制定和边界保温方法的选择提供依据。
- Analysis on cracks in concrete dam mass 混凝土坝坝体裂缝浅析
- The application of inter borehole acoustic wave method to probing deep cracks in mass concrete can effectively solve the above mentioned problems. 而应用声波跨孔法进行大体积混凝土结构的深裂缝检测可有效地解决上述问题。
- The paper presents a series of anti-cracking measures taken during the construction of mass concrete in hot weathers to prevent concrete cracking. 文章阐述了热天大体积混凝土施工过程中,为防止混凝土裂缝的产生,采取了一系列相应的防裂措施,达到了预期的效果。
- A new method for anti - seepage coating of roller compacted concrete dam by using wet - mix shotcreting polyacrylate emulsion cement mortar(PAE mortar) is presented in this paper. 针对碾压砼坝上游面的防渗，提出了湿法喷涂丙乳砂浆集中防渗的新方案。
- The temperature specific property and change regularity of the mass concrete in laminal pouring are mirrored exactly by the monitoring result. 监测结果真实地反映了锚碇建设中薄层浇注大体积混凝土的温度特性和变化规律。
- The concrete in concrete gravity dam,especially in RCC dam,is a stratified structure,so that its stratification feature is key to the safety of concrete dam. 在混凝土重力坝尤其是碾压混凝土坝中,混凝土为成层结构,因而层面特性对混凝土坝的安全至关重要,个别坝段水平薄弱面的存在对混凝土坝的整体安全性有重要影响。
- For the laminated pouring of mass concrete, the best time slot is close to the time that mass concrete reaches the tiptop temperature. 对分层浇筑混凝土而言，其最佳分层浇筑间隔时间一般在先浇筑层混凝土达到最高温升的时间附近。
- As the limit state equation of concrete dam is highly nonlinear and can t be expressed in an explicit form,the adaptive importance sampling method is suggested in this paper. 在大坝可靠度计算中,其功能函数具有高度非线性和无法显式表达的特性,解决此类问题的常用方法有响应面法、蒙特卡罗法、重要抽样法等。
- First, this paper uses finite element to analyze temperature field of mass concrete and derive corresponding calculative formula. 首先,应用有限元理论对大体积混凝土的温度场进行了分析,推导出了相应的计算公式。
- In recent years, there has been a big advancement in the rolling concrete dam construction, but there still exist some problems in the impervious structure. 碾压砼筑坝近年来已有了很大发展,但其防渗结构方面仍存在问题。
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