查询词典 Dam

In order to study local scouring field near the pier with sediment control dam, the 3-D velocity field of the pier in monomer model is subtly measured by ADV velocimeter of Sontek. This paper analyses the velocity distribution in the scouring pool of pier and takes turbulent strength distribution in different direction. Three new characters for the local scours of piers with the sediment control dam are analyzed and the dam's applicability is brought forward.

采用Sontek公司声学多普勒测速仪对有拦沙坝防护的模型桥墩附近流场进行了精细测量，对桥墩冲刷坑内三维流速分布进行了分析，给出了冲刷坑内三维紊动特征量的分布，分析研究了有拦沙防护坝时桥墩局部冲刷的三个新特点，提出了拦沙坝的适用条件。

The arch dam is a sort of space shell structure with complicated shapes. The stress level of dam body and the stability condition of abutment rock are the two key indexes to evaluate the safety of arch dam.

拱坝是一种外形复杂的空间壳体结构，坝体的应力水平和坝肩岩体稳定状况是评价拱坝安全性的两个重要指标。

The arch dam shoulders anti-slides stable and the distortion stable question initiates the arch dam safety incident\'s primary cause, is also one of dam area key project geology questions.

拱坝坝肩的抗滑稳定和变形稳定问题是引发拱坝安全事故的主要原因，也是坝区关键工程地质问题之一。

Thermal stress is important in whole dam stress distribution; especially the thermal stress in whole pouring block or long block is the main factor of inducing slit and even endangering dam safety. It is influence arch dam particularly.

温度应力在整个拱坝的应力分布中起重要作用，尤其是整体浇筑或长块浇筑的混凝土坝内的温度应力，是产生裂缝乃至危及坝体安全的主要因素，对拱坝的影响尤为严重。

Trough the analysis of stabilization safety on Tengzigou arch dam, some conclusions are obtained in the following:(1) Tengzigou arch dam is safe under normal poll level ;(2) stabilization safety factor of Tengzigou arch dam is about 4-5;(3) It is proved that combinatorial reinforcement measures are effective and feasible.

对藤子沟拱坝的数值计算和模型试验分析表明：(1)藤子沟水电站在正常蓄水位作用下，坝体和两岸坝肩是稳定的；(2)藤子沟拱坝的整体安全度大概为4～5左右；(3)东北院提出的对左岸泥岩层挖除处理并用混凝土置换的加固除险措施经研究表明该加固措施是有效、可行的。

Safety evaluation of high arch dam is related to the failure mode. It is necessary to find the most possible failure mode for the specified arch dam according to risk analysis. Then the safety degree of the dam relevant to the mode will be analyzed.

高拱坝安全度的评估需要与失效破坏模式联系起来，应通过风险分析寻找最可能失效模式，确定与此模式相应的安全度。

In concrete face rock-fill dam, especially when the dam is high, creeping of the dam body can be critical.

面板堆石坝尤其是高面板堆石坝的运行实践表明，堆石的流变现象比较显著。

Secondly, to analyze seismic response of the concrete gravity dam, subspace iterative method was applied to compute free vibration period of the dam, time integration method was builtup for the seismic time history analysis and formulation of coupled vibration of reservoir water and dam were also deduced.

其次，针对混凝土重力坝的地震响应分析问题，采用子空间迭代法计算了大坝的自振周期，建立了地震时程分析的逐步积分方法，并且推导了库水和坝体耦合振动的理论公式。

It founds natural heightening theory for warping dams and puts forward specific way of diversion, measures for preventing dam eroded and design for energy dissipation and flood storage of cofferdams and sedimentation and dewatering through exploration and study on deposition in front of natural formed dam and the techniques of building dam through hydraulic filling....

通过对天然聚湫坝体前的淤积和&水力冲填&筑坝技术的探索和研究，创立了淤地坝坝体自然加高的理论，并提出了具体的导流方式、坝体防冲措施及围堰消能蓄洪、留淤脱水设计。建议尽快立项开展坝体自然加高现场试验和模拟试验。

"Hoover Dam: formerly Boulder Dam, Highest concrete arch dam in the U.S., built on the Colorado River at the Arizona-Nevada border ."

胡佛水坝：旧称顽石坝，美国最高的混凝土拱坝；建于亚利桑那－内华达州边界的科罗拉多河上。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。