岔管

The design of large reinforced concrete bifurcated pipe under high water pressure is one of them.

高水头、大容量的钢筋混凝土岔管的设计分析就是其中之一。

Currently, the guidelines for the design of reinforced concrete bifurcated pipe are not perfect, it is difficult to explore them clearly in theory, and their work conditions are not fully understood.

目前，地下钢筋混凝土岔管的设计准则尚不完善，要完全从理论上探讨清楚具有相当的难度，人们对其工作状态也并不完全了解。

A linear distribution parameter of strain is put forward as a standard to show.

为证实岔管是否处于弹性工作状态，提出用径向截面上的应变线性分布系数作为衡量的标准。

So the design and study of branch pipe is one of the important parts in the steel design.

所以岔管的设计和研究是输水建筑物系统设计和研究的重要内容之一。

Nowadays the single tube and single-unit hydroelectric station have been used widely and skillfully, but it is necessary for some large hydropower stations to use tailrace bifurcated tubes, just as Xiaolangdi, Xiangjiaba, Baishe project and so on. So it is significant to study the transients of long tailrace tunnel with tank or without tank.

对于尾水系统，单管单机的布置方式比较成熟，尾水岔管的布置方式目前在大型电站中用的较多，如小浪底、向家坝、百色等，因而研究其在有尾水调压井和无尾水调压井的情况下的过渡过程，很有实用意义。

Meanwhile, the intersection part of the bifurcation pipe is haunched, which helps to relief the stress concentration of the bifurcation pipe.

同时，经分析认为在岔管相贯部位采取了加腋措施，可有效缓解岔管部位的应力集中。

The SIMPLE method is applied in the calculations of Reynolds averaged flow equation and к-εturbulence equation. By using DPIV system and pressure difference gauge, the detail measurement of water flow in the horizontal plane of fork tube is made.

计算中选择SIMPLE方法求解三维雷诺平均方程和k-ε两方程湍流模型，实验采用数字图像测速系统和在试验段前后断面上安装液体差压计对三岔管中心的水平面内的压强差进行测量。

This method is most special is the principle of simple and clear, setting out the process visible and tangible, it is applicable to a little bit knowledge of sheet l scene lofting geometry, which is a revolutionary approach, which not only greatly reduced the mapping workload, but also a great convenience in construction. Same time, it can also be a more traditional method (open show diagram drawing or galvanized sheet cut oil felt like, after re-opening in the pipe body gestures draw the cutting line method) is more accurate and pipe sections match exactly between the butt, thereby ensuring the steel fork tube and bend production quality.

该方法的最大特就点是原理简单明了，放样过程看得见摸得着，很适用于稍有一点几何常识的钣金工现场放样，这是一革命性的方法，它不仅大大地减少了制图工作量，而且也极大方便快捷了施工，同时它还可较传统方法（绘制开口展图后用油毛毡或镀锌板裁样再后在管身上比划绘出开口切割线的方法）来得准确无误与管段间对接严丝合缝，进而保证钢岔管和弯头的制作质量。

A series of experiments and numerical simulation of water flow in the Y type tube with circular cross section have been carried on to meet the request of the design for fork tube in the Yixing Hydropower Plant.

结合江苏宜兴抽水蓄能电站工程建设中钢岔管的设计要求，对分岔角为 6 4°的三岔管内水流的流动进行数值模拟与实验研究。

According to the design criteria of reinforced concrete penstocks, combined bearing ability of bifurcated steel penstock and anchor concrete block should be considered to reduce the thickness of steel penstock.

建议考虑镇墩混凝土与钢岔管联合承载，按钢衬钢筋混凝土管道的设计方法进行设计，以达到减小钢岔管管壁厚度、简化施工工艺和节约工程投资的目的。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。