Calculation of stilling basin

1. The number of steel bars needed to be configured has a great relationship with the stress of concrete members
the stress should be calculated first, and then the number of reinforcement should be calculated according to the regulations issued by the state
how to calculate? You can search the keywords of "reinforcement calculation of reinforced concrete structure" on the Internet to find the design rules, design tutorials, and design methods

2. Calculated value = - 7.255 & lt= 110.000(kPa)

3. The purpose of building a sluice on the river is to intercept the water from the upstream and raise the water level for diversion irrigation and water supply
when there is a flood in the upstream, it is necessary to open the sluice to discharge the flood. In order to ensure the safety of flood discharge, when the water level difference between the upstream and downstream is small (such as 0.03m), it is still necessary to discharge a certain amount of flow safely, so the corresponding total clear width of the sluice is required
because the head difference will affect the size of the gate flow, which will also affect the scale of the project. During the impoundment period, the water level difference between the upstream and downstream is often very large, while when the sluice is opened (from the discharge form, it is the transition from orifice flow to weir flow), the water level of the downstream will rise slowly, that is, the water level difference between the upstream and downstream has a narrowing process. In this process, energy dissipation is also changing. In the initial discharge, the downstream water level is generally low, and the energy dissipation problem is relatively prominent; With the rise of the downstream water level, the submergence degree of the hydraulic jump will increase, and the energy dissipation conditions will be improved
in calculating the working hours of energy dissipation, several discharge volumes can be used to calculate the water depth after the jump respectively, and then compared with the downstream water depth, and the discharge corresponding to the most unfavorable situation can be selected as the design discharge to determine the depth of stilling basin. The design flow for determining the length of stilling basin is not necessarily the same as that for determining the depth, but also needs to be determined by corresponding combination
in principle, the downstream water depth should be determined according to the relationship curve between water level and discharge (which can be calculated according to the measured data or the open discharge uniform flow), but in the actual engineering design, the situation is often not simple, especially for small sluice
the upstream water level is relatively easy to determine, because there will be a normal water level in the design, in addition, there may be the highest water level, limited water level, etc., so the key depends on the selection of the downstream water level, but there is no completely universal method
therefore, several characteristic water levels can be selected according to the current situation of the river and the actual application requirements (generally unsafe, sometimes it is assumed that there is no water in the downstream), and then combined with the characteristic water level in the upstream to calculate the parameters of the energy dissipator.

4. When there is a flood in the upstream, it is necessary to open the sluice to discharge the flood. In order to ensure the safety of flood discharge, when the water level difference between the upstream and downstream is small (such as 0.0.3m), it is still necessary to safely discharge a certain amount of flow, so the total net width of the corresponding sluice hole is needed, During the period of impoundment, the water level difference between the upstream and downstream is often very large. However, when the sluice is opened (from the form of discharge, it is the transition from orifice flow to weir flow), the downstream water level will rise slowly, that is, the water level difference between the upstream and downstream has a process of narrowing. In this process, the energy dissipation situation is constantly changing. In the initial discharge, the downstream water level is generally low, At this time, the problem of energy dissipation is relatively prominent; With the rise of the downstream water level, the submergence degree of the hydraulic jump will increase, and the energy dissipation conditions will be improved, Then, the flow corresponding to the most unfavorable situation is selected as the design flow for determining the depth of stilling basin. The design flow for determining the length of stilling basin is not necessarily the same as that for determining the depth, and it needs to be determined by corresponding combination. In principle, the downstream water depth should be determined according to the relationship curve between water level and flow (which can be calculated according to the measured data or the open discharge uniform flow), However, in practical engineering design, the situation is often not simple, especially for small sluices. The upstream water level is relatively easy to determine, because there will be a normal water level in the design, in addition, there may be a maximum water level, limited water level, etc., so the key depends on the selection of downstream water level, but there is no completely universal method, According to the current situation of the river and the actual application requirements, several characteristic water levels can be selected (generally unsafe, sometimes it is assumed that there is no water in the downstream), and then combined with the characteristic water level in the upstream to calculate the parameters of the energy dissipator

5. The number of steel bars needed to be configured has a great relationship with the stress of concrete members
the stress should be calculated first, and then the number of reinforcement should be calculated according to the regulations issued by the state
how to calculate? You can search the key words of "reinforcement calculation of reinforced concrete structure" on the Internet to find design rules, design tutorials, and design software

6. The pressure at a certain depth in the water is p= ρ Hg=1 × 10³ kg/m³ × H × 9.8N/kg=9.8 × 10³ × HPa/m³ Where h is the water depth; Pressure f = P × S (stressed area)

7. It can be calculated by referring to the formula: py = YW * (H + H) * a
py: uplift pressure on the floor (KN)
YW: volume weight of water (KN / M & # 179;)
H: downstream water depth (m)
H: floor thickness (m)
A: floor area (M2)

8. The height of the wing wall on the side of the stilling basin can be set as the maximum water depth after the downstream jump when discharging, and then the superelevation can be added.
the filling on the top of the wing wall is treated with masonry revetment instead of setting the top elevation of the wing wall directly to the elevation of the check flood level
the following calculation method is for reference only< (1) determination of stilling basin depth: S = SHC - h t - d z
through calculation, the stilling basin depth is XXM, and the design is XXM

(2) calculation of stilling basin length:
LK = BL J
LJ = XX (fr1-1) (FR1 < XX)
where LK is stilling basin length (m)
b - hydraulic jump length correction coefficient, x ~ x can be used
LJ - hydraulic jump length (m)
through calculation, the length of stilling basin is XXM, and the design is XXM

(3) the calculation of the height of the side wall of the stilling basin: the downstream maximum conjugate water depth HC = XX & quot; According to the engineering design standard, the super height of the side wall of the stilling basin is taken as XXM, so the height of the side wall of the stilling basin calculated from the bottom plate of the stilling basin is (XX + XX) M

X represents the value you want to calculate, or the existing data value!

9. Gtx650? In terms of precision floating-point operation, it's hard to find the same graphics card, only the same performance, gt740, hd7750, hd6770, gtx550ti. The game performance of these four graphics cards is similar to that of gtx650, except for the power consumption,

10.

Hello, classmate, I'm glad to answer for you

Gordon online school answers for you:

money flow is a mature technical index in the world. It can help investors see what other people are doing through the fog of index (price) rise and fall. When the index (price) rises by one point, it may be driven by 10 million capital or 100 million capital. These two situations have completely different guiding significance for investors

when the index is on the rise, the turnover is the driving force for the index to rise, which is defined as capital inflow; When the index falls, the turnover is the driving force for the index to fall, which is defined as capital outflow; The difference between the two forces on the same day is the net force that drives the index up after the balance of the two forces on the same day, which is the net capital inflow of the plate on the same day. In other words, capital flow measures the strength of driving the index up and down, which reflects the extent to which people are short or long on the sector

In general, the trend of capital flow is very similar to that of the index, but in the following two cases, the index of capital flow has obvious guiding significance:

1. For example, the whole day index of this sector is falling, but the capital flow shows that the whole day capital is net inflow

2. There is a big deviation between the capital flow and the index's rise and fall on the range. For example, the whole day index has a higher rise, but the actual net inflow of capital is very small

when the capital flow deviates from the rise and fall of the index, the capital flow can better reflect the actual situation of the market than the rise and fall of the index

the judgment of capital flow plays an important role in the analysis of stock market trend and indivial stock operation, but the judgment process of capital flow is complex and difficult to master. Here are some ways to judge the flow of funds

generally speaking, the "hot spot" is actually the indivial stocks with concentrated capital flow, and the "plate rotation" is actually the disk effect caused by the rotation of capital flow. If the funds flow into the "hot" stocks, it indicates that the hot money comes into the market, and the stocks have the conditions to launch the market

the hot spots of capital flow can be observed from the turnover ranking of the two cities: the top 20 to 30 stocks in the daily turnover list are the hot spots of capital flow. The focus of observation is whether these stocks have similar characteristics or are concentrated with some sectors, and whether they occupy enough time in the turnover list (half a day, a day The length of three-day waiting time is directly proportional to the strength of attracting funds. It should be noted that when the market turnover is relatively low, some large cap stocks occupy the top of the transaction list, and the volume ratio of these stocks is not significantly enlarged, which indicates that the market sentiment is slack at this time, rather than representing the concentration of capital flow

when observing stock selection, we need to pay attention to the volatility of capital flow, and observe the volatility of capital flow from the up and down list: the entry of large capital (usually referred to as institutional investors or main capital) is different from that of idle small capital, and large capital is better at exploring investment varieties with rising space (from the chart, it is relatively low entry), Whether idle hot money is concentrated or not depends more on whether the market is good at that time. Therefore, from the disk point of view, the indivial stocks in the plate have the property of rotation, and the time for large capital to enter and leave the market is earlier than the average time for small capital to enter and leave the market

How to find out that the main force has already started? Look at the list of rise and fall: the indivial stocks that initially launched the market (with the highest rise and enlarged trading volume) often have the most demonstration effect. If you don't buy the leading stocks, you can buy the indivial stocks that are like the leading stocks but haven't risen sharply (from the Perspective of trend and plate), because the capital has the nature of rotation, you must remember. The main force will only lift the sedan chair, not liberate

in addition, it depends on whether some of the stocks in the top decline list have had an upward trend in the past two days and whether the trading volume in these two days is relatively large. If it is, it means that the popularity has been gathered, and the funds to follow suit are relatively firm, which is concive to the sustainable development of the market. Of course, the large-scale decline after a sharp rise is not included

as the world's leading financial certificate network ecation brand, Galton finance integrates the core resources of financial ecation, and owns platform resources such as Galton online school, open class, online live broadcast, website alliance, financial question bank, Galton tribal accounting forum, app client, etc., providing high-quality services and comprehensive solutions for people in the global financial sector

gaon online school will always adhere to the enterprise mission of "achieving young dream, creating new business civilization", speed up the process of internationalization, and build a world-class financial online learning platform

Gordon wish you a happy life! If you still have any questions, please ask questions to Galton