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high dam
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  高坝
    The Effect of Age of Loading and Aggregate Gradation on theFracture Energy (G_F)and Fracture Toughness (K_(IC))of High Dam Concrete
    龄期及粗骨料级配对高坝混凝土断裂能G_F和断裂韧度K_(IC)的影响规律
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    For the dynamic analysis of some important complex structures such as high-rise,high dam, nuclear power station and so on, the wave propagation from structure intoinfinite foundation should be considered.
    摘 要在高层、高坝和核电站等重大复杂结构的动力反应分析中,波动能量向无限域地基的逸散影响是重要的。
短句来源
  高拱坝
    Once the great important structure, such as high building, high dam undergo destroyed, the effect will be quite serious.
    高层结构、高拱坝等重大建筑结构一旦遭受破坏,后果将相当严重。
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  high dam
-We have examined the digital waveform data and relocated a number of events within the June 1987 earthquake swarm, which occurred beneath the northern part of Lake Aswan, 70 km southwest of the Aswan High Dam in Egypt.
      
Previous estimates of average annual evaporation from the lake formed by the High Dam at Aswan, Egypt, fall in the range from 4.65 mm d-1 to 7.95 mm d-1.
      
Net radiation has been measured for the first time over the Aswan High Dam Lake on the Nile River for 132 days including warm and cold seasons.
      
Effect of storage reservoirs on the behavior of rock masses of high dam beds
      
Measurement of the upper pool levels of a high dam during construction
      
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The paper describes the compaction characteristics of clayey soil. In view of the basic conception that the optimum degree of saturation Srop under various compaction energy is constant, and the optimum moisture content of the standard compaction energy is approximately the plastic limit, a method by using plastic limit wP and optimum saturation for estimation of the maximum dry density is presented as follows:γdmax=Srop·G3/G3wp+Sropwhere G3 is the specific gravity of the soil particles,wP is the plastic limit.Methods...

The paper describes the compaction characteristics of clayey soil. In view of the basic conception that the optimum degree of saturation Srop under various compaction energy is constant, and the optimum moisture content of the standard compaction energy is approximately the plastic limit, a method by using plastic limit wP and optimum saturation for estimation of the maximum dry density is presented as follows:γdmax=Srop·G3/G3wp+Sropwhere G3 is the specific gravity of the soil particles,wP is the plastic limit.Methods of determining the compaction criterion of clayey soil are discussed and the coefficient of construction m is introduced and demonstrated with suggestion value 0.95~0.97 for medium and low dams, and 0.97~0.99 for high dams.

本文总结了粘性土的压实特性,从不同击实功能下土料的压实最优饱和度S_(rop)为常数、标准击实功能的最优含水量ω_(op)约等于塑限ω_p这些基本概念出发,提出了用塑限、最优饱和度来估算粘性土的最大干容重γdmax。即S_(rop)=C,W_(op)=ω_p且当W_p≤17%,S_(rop)=(3ω_p+35)%ω_p>17%,S_(rop)=(0.3ω_p+80)%γdmax=(Gs·S_(rop))/(Gs·ω_p+S_(rop))在文中讨论了确定粘性土压实标准的方法,并对施工条件系数m进行了论证,提出了建议数值。即对于中低坝:m=0.95~0.97对于高坝:m=0.97~0.99

To use slightly weathered rock masses as the base surface of high dams, as is the case in the construction of the Ertan arch dam, is a problem of great economic profit and scientific significance. It is directly related to the amount of excavation, time limit and cost of projects. In order to ensure the stability and economy of the Ertan arch dam, it was required that the slightly weathered rock masses around the base surface should be treated by grouting reinforcement and their mechanical...

To use slightly weathered rock masses as the base surface of high dams, as is the case in the construction of the Ertan arch dam, is a problem of great economic profit and scientific significance. It is directly related to the amount of excavation, time limit and cost of projects. In order to ensure the stability and economy of the Ertan arch dam, it was required that the slightly weathered rock masses around the base surface should be treated by grouting reinforcement and their mechanical characteristics after reinforcement should be studied. In this paper, the test results about the mechanical characteristics of grouted rock masses are presented and the mechanism of mechanical variation of rock masses is analysed theoretically by use of the fracture-damage mechanics method. Test results and theoretical anaylsis show that the strength of rock masses has been increased and thus can fulfill the requirements of dam design.

对高坝建基面使用弱风化岩体,成为具有重大经济效益及学科意义的问题,它直接关系工程的开挖量、施工工期和工程造价。在二滩拱坝的建设中就遇到了这样的问题,为了确保大坝的稳定性及经济性,要求对建基面附近的弱风化岩体进行加固灌浆处理,并研究其加固后的力学特性。本文叙述了灌浆后岩体力学特性的检测结果,并用断裂—损伤力学方法对岩体力学变化的机制做了理论分析。实测结果及理论分析表明,灌浆后岩体的力学强度有了提高,可以满足大坝设计的要求。

In view of the universal weak technical links in the construction of high arch dam which are mainly focused on the material properties study on the mass concrete, and in combination with the construction of the Ertan Hydropower Station, the study on the high strength mass concrete mix proportion, the dynamic strength properties of mass concrete and strength deformation and crack properties of fully graded concrete specimen all have been made. A design system of the optimal concrete crack resistance mix proportion...

In view of the universal weak technical links in the construction of high arch dam which are mainly focused on the material properties study on the mass concrete, and in combination with the construction of the Ertan Hydropower Station, the study on the high strength mass concrete mix proportion, the dynamic strength properties of mass concrete and strength deformation and crack properties of fully graded concrete specimen all have been made. A design system of the optimal concrete crack resistance mix proportion for high dam has been set up for the first time in China. The test and study on the concrete characteristic parameters of dam body under the action of earthquake have been made. The imitation study on the whole failure process of the full graded concrete has been finished. All these results enrich the theory of concrete damage and cracking, develop and enhance the test technologies of concrete. The study achievement has reached the international advanced level, which has been appraised by the State. Some study results have been applied in the construction of Ertan Project.

针对目前高拱坝建设中普遍存在并反映在大体积混凝土材料特性研究的技术薄弱环节,结合二滩水电站建设,对高强度大体积混凝土配合比、大体积混凝土动态强度特性、全级配混凝土试件强度变形特性和损伤断裂特性进行了研究,在我国首次建立了高拱坝混凝土抗裂优化配合比设计系统,首次对地震作用下坝体混凝土特性参数进行了试验研究,完成了全级配混凝土破坏全过程的仿真性研究,丰富了混凝土损伤断裂理论,发展和提高了混凝土材料的试验技术。研究成果经国家鉴定,总体达到国际先进水平。部分中间研究成果已经在二滩工程施工中得到应用。

 
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