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Mass concrete invert construction for Caoe River Sluice 曹娥江大闸大体积混凝土底板施工
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 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。
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。
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。
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。
This paper presents the construction methods of mass concrete for main pier abutment of the Fourth Bridge on Xiangjiang in Xiangtan. 本文对湘潭湘江四大桥主墩承台大体积混凝土施工中的施工方法进行阐述,并对施工过程中应该注意的质量控制方法进行分析和总结。
Up to present, cooling methods, such as pipe cooling and precooling, are used to control the maximum temperatures in mass concrete to prevent cracking. 摘要提出一种新的混凝土结构温控防裂方法，利用水管加热、表面热水或表面热风，以加热下部混凝土，减少上下部温差，防止混凝土裂缝。
Key words： reinforced concrete、 concrete、 high performance concrete、 cement concrete、 pozzolanic effect、 mass concrete. 关键词：钢筋混凝土、混凝土、性能混凝土、高强混凝土、泥混凝土、生骨料混凝土、体积混凝土。
Great temperature difference and thermal stresses are caused by heat of hydration of cement to lead to creaks during mass concrete construction processing. 在大体积混凝土工程施工中,由水泥水化热引起混凝土浇筑体内外温差和温度应力的剧烈变化,产生裂缝。
The authors consider that as a new concrete admixture the phosphorous slag is particularly suitable for use in internal part of hydraulic structure mass concrete. 认为，磷渣作为一种新的混凝土掺和料，尤其适用于水工大体积混凝土的内部。
In this paper, by using Monte Carlo Method with irregular grid random walk in time-space domain the problem of mass concrete transient temperature field was solved. 摘要利用求偏微分方程的蒙特卡罗算法，通过在时空域中不规则网格随机游动来求解大体积混凝土不稳定温度场。
Based on the insufficiency of existing expansive admixture in compensating shrinkage of the mass concrete,a double expansive resources admixture is introduced. 本文分析了现有膨胀剂在补偿大体积混凝土收缩方面的不足,介绍了一种双膨胀源膨胀剂。
Prefabrication of permanent reinforced concrete casing as the formwork is one of optimal alternatives for expediting the progress of the construction of mass concrete at sea. 预制永久性钢筋混凝土护筒模板的施工方案是加快海上大体积混凝土施工速度的优选方案之一。
A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
In this paper,by using Monte Carlo Method with irregular grid random walk in time-space domain the problem of mass concrete transient temperature field was solved. 利用求偏微分方程的蒙特卡罗算法,通过在时空域中不规则网格随机游动来求解大体积混凝土不稳定温度场。
LI Dong.Viscoelastic numerical analysis of mass concrete structure subjected to deformational loads [J].Journal of Xi'an Highway University, 1998,18(4): 63-67. [3]李东.;大体积混凝土在变形荷载作用下的粘弹性有限元数值分析[J]
Based on the theory of value engineering and control to adiabatic temperature change of mass concrete,it is proposed four-functions principle for design optimization of GHPC. 根据价值工程理论,提出了基于大体积混凝土绝热温升控制的绿色高性能混凝土(GHPC)优化设计的四功能准则。
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。