坝头

此外，半圆形透水坝头可使坝头冲刷坑深度提高05～10m。

In addition , scour depth around the semi circular permeable groin head will decrease by 0.5 ~ 1.0 m.

强潮河口丁坝坝头块体抗冲稳定分析

Erosion-Resisting Characteristics of Blocks on Groin Head in Micro-Tidal River Mouths

基于BP神经网络的丁坝坝头冲刷深度预测模型

The groin abutment degradation depth prediction model based on BP neural network

丁坝坝头基础防护的方法探讨

The Probe in to the Protection Methods of T-embankment Head Base

漫水丁坝坝头床沙起冲流速研究

Study of initial scour velocity of bed sand around submerged spur dikes

非淹没丁坝坝头冲刷深度的计算

Study on scouring depth around non-submerged spur dike

丁坝挑角等参数对坝头冲刷深度的影响

Influence on scour depth of spure dike parameter

丁坝坝头冲刷坑深度的研究

A Study on the Local-Scour Holes at Groin-Nose

潮流波浪作用下丁坝坝头概化模型的冲刷试验

General scouring model test of dike ′ s head under tidal currents and waves

丁坝坝头的局部冲刷对丁坝的整治效果产生不利影响。

Local scour on the head of a spur dike is disadvantageous to the structures .

强潮河口丁坝坝头砂肋软体排护底稳定性试验研究

Experimental study on stability of sand ribbed soft mattress of dike head for macro-tidal estuary

长江口典型丁坝坝头冲深计算模式选择与验证

Model selection and verification for a typical spur dike 's scour depth in the Yangtze River Estuary

深圳水库主坝坝头小山包深层承压水的探讨

Discussion on the Deep Layer Pressure Water in the Hill of the Major Dam Abutment of Shenzhen Reservoir

在坝头附近产生的旋涡作用体系是造成丁坝局部冲刷的主要原因。

The local scour near the head of spur dyke is mainly caused by the generated eddy system .

在分析基础上，提出了漫水丁坝坝头床沙起冲流速的计算办法。

Then , the calculating method of initial scour velocity of bed sand around submerged spur dikes is suggested .

基于丁坝坝头水流结构，提出了坝头绕流挤压流动模式；

Based on the flow structure of the spur dike head , the mode of flow of pressing circumfluence is proposed .

研究丁坝坝头块石的走失原因对河道整治工程、路基桥梁等的经济和安全都有很重要的意义。

Research on the missing of rocks around spur dikes is of importance on the economy and safety of river regulating structures , roadbed and bridges .

盘石水库右坝头岩体结构面工程特性浅析

Analysis of the engineering characteristics of right abutment terrene structural plane in Panshi reservoir Priming Charge for the Earthwork of the Discharge Tunnel of Meishan Reservoir

为探索有关规律，寻找工程设计的依据，对缓流时的漫水丁坝坝头床沙起冲流速进行了尝试性的试验研究，对部分影响因子进行试验分析。

Exploratory experiments and analyses are introduced herein to study the initial scour velocity of bed sand around submerged spur dikes and some factors influencing the velocity .

丁坝冲深极限值是确定建筑物基础埋设深度的一个主要因素，丁坝设计和施工中的关键问题在于确定坝头最大冲深。

The scour limit depth around spur dikes is very important for calculating the base depth of objects and it is a key factor in designing and working .

河道中修建丁坝将改变丁坝附近的水流流态，出现复杂的三维水流现象，可能影响坝头附近的船舶通航安全。

Built in the river near the alignment of spur dike shore will change the flow regime , forming complex three-dimensional flow , it may affect the ship navigation safety .

本文对深圳水库主坝坝头小山包所出现的深层承压水现象的机理进行了分析.并对承压水现象作一些探讨。

Abstract : This paper analyzes the mechanism of the deep layer ' pressure water ' in the hill of the major dam abutment of Shenzhen reservoir and discusses the phenomenon of ' pressure water ' .

设计丁坝时，漫水丁坝坝头床沙起冲流速是漫水丁坝局部冲深计算的基础，迄今为止，有关这方面的研究文献所见甚少。

The initial scour velocity of bed sand around submerged spur dikes is the basis for calculating the local scour depth around spur dikes , and the papers about computing the depth is rarely found up to now .

由此根据有效局部水流连续原理，建立了丁坝坝头冲刷深度计算公式，该式涉及因素较全面，公式建立过程中所使用的数学模式清晰，物理意义明确。

According to the principle of continuity of efficient local flow and fully considering the influencing factors , a formula of scouring depth around spur dike is built ; this formula has an explicit mathematical mode and physical conception .

在坝头深裂详细调查研究的基础上，分析拱间槽边坡开挖前后的可能失稳破坏模式及失稳块体的边界条件；

Thirdly , based on the characters research of the deep fracture at the left abutment slope in detail , the failure mode of the abutment slope and boundary condition of the potential failure block after excavation are analysed .

相应的模型试验结果表明，整流桩可有效改善丁坝坝头局部水流结构，进而使丁坝坝头冲刷坑深度减小，最大冲刷部位发生偏离，有利于丁坝的稳定。

The outcomes of the model tests show that the protective means can effectively improve the local flow structure at the head of groin , reduce the depth of scouring and change the maximum scouring place that are propitious to the stable of groins .

浙江省仙居水电站拱坝左岸坝头山体较雄厚，且软弱夹层出露的高程较高，故采用扩大基础的推力墩结构。

For the arch dam of Xianju Hydropower Station in Zhejiang Province , the mountain body of the abutment on the left bank is quite thick with the emergence of weak intercalated layers at higher elevation ; therefore , the thrust pier with enlarged base is adopted .

脊坝及刺坝坝头处流速变化剧烈，形成较大的流速梯度；

Near the head of the fish back and the fish bones , the velocity changes greatly with large velocity gradient .