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dam-bursting
相关语句
  溃坝
     A Study on Dam-Bursting Disaster in Yan'an City
     延安市溃坝灾害的研究
短句来源
     A New and Highly Accurate Numerical Model of Dam-bursting Flow
     一种新的高精度的溃坝水流数值模型
短句来源
     Dam-bursting, strictly speaking, is a problem of non-continuous flood wave.
     溃坝问题,严格来讲,是一种不连续洪水波问题。
短句来源
     Traditional numerical models of flow are established in general on the basis of Saint-Venant equations for numerical soloution, the basic assumption of which is that the flow must be of continuity. Hence, it is extremely farfetched to apply the flow numerical model which is based on Saint-Venant equations to calculating the dam-bursting problem.
     传统的水流数值模型都是建立在数值求解圣维南方程组基础上的,而该方程组的基本假定就是水流必须具有连续性,所以,以圣维南方程为基本控制方程的水流数值模型应用于溃坝问题的计算是非常牵强的。
短句来源
     The authors present a new method of flow numerical simulation based on BGK Bolzmann equation for describing molecular motion, in which there is no assumption that the flow should be continuous. Calculations show that this numerical model can accurately and steadily simulate the problem of dam-bursting wave.
     提出一种新的以描述分子运动的BGK波尔兹曼方程为基础的水流数值模拟方法,这种方法没有水流连续性假定,计算表明,这种数值模型能够精确、稳定地模拟溃坝波问题
短句来源
  相似匹配句对
     Self-bursting dam in reservoir and its application
     水库自溃坝及其应用初探
短句来源
     Analysis of Dam Bursting Flood of Shannan Reservoir
     山南水库溃坝洪水分析
短句来源
     A SEISMOGENIC PATTERN LIKE "DAM BURSTING
     “坝体决口”孕震模式
短句来源
     Redstratum And Dam
     红层与大坝
短句来源
     ON THE BLOSSOMY DAM
     在那野花盛开的坝上
短句来源
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A new method is developed for the calcuation of hydraulics characteristics of dam-burst with arbitrary outlet which can be described with a number of broken lines. Combinative-parameters are defined firstly accor-ding to all parameters defining the cross-section of the outlet. A transformation related to the combinative-parameters is deduced thereafter. With this transformation, the cross-section parameters of dam-burst are separated from the integral equation and become a coefficient which can be calculated....

A new method is developed for the calcuation of hydraulics characteristics of dam-burst with arbitrary outlet which can be described with a number of broken lines. Combinative-parameters are defined firstly accor-ding to all parameters defining the cross-section of the outlet. A transformation related to the combinative-parameters is deduced thereafter. With this transformation, the cross-section parameters of dam-burst are separated from the integral equation and become a coefficient which can be calculated. The original integral equation of dam-burst, which has been expressed by all shape-parameters, is transformed into a model equation. The model equation can be treated as a pure mathematical problem. Tables and charts can be worked out, which are very convenient to use. The advantage of this method is that the hydraulic characteristics of dam-burst can be obtained straightforward from the cross-section of the outlet.

用多条折线段来描述一个任意给出的溃坝决口断面形状,对溃决后的水力特性问题本文提出一种新的求解方法。首先依据决口断面形状寻求断面形态组合参数;然后依据一个与组合参数有关的变换,使断面形态参数从积分方程式中分离出来,成为一个可以确定的系数,原来由若干个断面参数所描述的任意形状决口溃坝问题的积分方程式将化为一个模型范式的求解问题。 对于模型范式可以脱离溃坝问题而作为纯数学问题独立求解并绘制成相应的图表,这就给应用带来极大方便。新方法的特点是可以直接依据决口断面形状求溃决后的水力特性。

The lighter danger district of debris flow is Ⅴ_a-District with actual and potential capacity oflight harm or threatening; nearly without danger district of debris flow is Ⅴ_b-District with ncarlyno harm or threatening.Ⅴ_a-District is divided into 15 parts. The area is 27.05×10 ̄4km ̄2 and27% of the area of the upper reaches of Changjiang Revir.Ⅴ_b-District is divided in to 4 parts.The arca is 3.25 × 10 ̄4km ̄2 and 3% of the area of the upper reaches of Changjiang Revir. Thedistrict is distributed over 6 provinces(see...

The lighter danger district of debris flow is Ⅴ_a-District with actual and potential capacity oflight harm or threatening; nearly without danger district of debris flow is Ⅴ_b-District with ncarlyno harm or threatening.Ⅴ_a-District is divided into 15 parts. The area is 27.05×10 ̄4km ̄2 and27% of the area of the upper reaches of Changjiang Revir.Ⅴ_b-District is divided in to 4 parts.The arca is 3.25 × 10 ̄4km ̄2 and 3% of the area of the upper reaches of Changjiang Revir. Thedistrict is distributed over 6 provinces(see Table l).In Ⅴ_a-District ,the activities of debris flowate mainly feeble and feebler,the level of economic development is lower and there are mainlvawaiting development district(area is 17.12 × 10 ̄4 km ̄2). The landform indexes are mainly 4 grade and 5 grade(the relative height h of statistic unitis 1 000-500m and<500m respectively).In the ravine,cutting is shallower and the dynamicconditions of debris flow which is provided by landform is little. Most geologic indexes are 5grade(the product S of fault length and strata weathering coefficient in statistic unit<0.10)and 4 grade(S=0. 15-0.10);The length of main fauIts is 108m /km ̄2(in Ⅴ_a-District)and23m /km ̄2(in Ⅴ_b-District).Most climatic index is 4 grade, The geologic and landform conditionsand climatic conditions are not favourable to the formation of debris flow.There is none debris flow activity in Ⅴ_b-District. Damages of debris flow are very light andits activity appears only in local area in small scale and low frequency in Ⅴ_a-District,but thehazards of man-made debris flow eaused by reservoir dam burst,may happen. Therefore,man-made debris flow should be prevented emphatically.

长江上游泥石流轻度危险区(属Ⅴ_a级区)分为15个小区,基本无危险区(Ⅴ_b级区)分为4个小区.全区跨6省,面积30.30万km ̄2.本区泥石流自然危险度级别以E级为主,经济发展程度级别多为5级(经济待发展区).区内泥石流活动微弱,危害轻,但有个别人为泥石流造成的重灾点.本区的重点防范对象是人为泥石流.

Completed in October 1990, Gouhou Reservoir had a storage capacity of 3. 300. 000 cubic meters and its dam was of reinforced concrete faced gravel fill dam with a maximum height of 7lin. Because of long duration of high water level. the phreatic line of the dam was raised, the gravel fill was saturated. and the effective shearing strength was decreased. Under the self-weight of the high wave wall and the relevant soil fill. the subsidence and rotation of the wave wall wereresulted. Then the waterstop was pulled...

Completed in October 1990, Gouhou Reservoir had a storage capacity of 3. 300. 000 cubic meters and its dam was of reinforced concrete faced gravel fill dam with a maximum height of 7lin. Because of long duration of high water level. the phreatic line of the dam was raised, the gravel fill was saturated. and the effective shearing strength was decreased. Under the self-weight of the high wave wall and the relevant soil fill. the subsidence and rotation of the wave wall wereresulted. Then the waterstop was pulled out and the downstream slope near crest lost its stability. The reinforced concrete fsce near crest above the river channel was continuously broken and landsliped, and burst opening was formed' The burst of the dam happened in the evening of August 27, 1993. The lack of elaborately design and construction experience. the loose operation management and the profession management being not carried out in the hydraulic engineering construction are the main lessons to be drawn in this dam burst incident.

沟后水库1990年10月建成,总库容330万m3。大坝为钢筋混凝土面板砂砾石坝.坝高71m。由于库内高水位持续时间长,坝体浸润线抬高,砂砾石饱和,有效抗滑强度减小.再加高防浪墙和填土荷载作用,导致防浪墙下沉、转动,拉脱止水,坝顶下游坡失稳,在水荷载作用下,河床坝段坝顶面板相继折断、滑落,形成溃口,于1993年思月27日晚溃坝。设计不够精心,施工经验不足,放松了运行管理,以及在水利工程建设中没有实行行业归口管理,是这次溃坝事件主要应吸取的教训。

 
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