側槽溢洪道設計(共18頁)

1、 目錄資料：2(一) 計算測槽長度L.3（二）計算測槽末端水深。3（三）確定控制斷面坎高。4（四）計算各斷面流量。5(五)測槽水面曲線計算。6（六）泄槽計算。13（七）泄槽橫斷面布置15（八）消能防沖設計16資料：某大（2）型水庫，正常蓄水位為30m,設計洪水位為32m(相應泄流量為150m3/s),校核洪水位33.43m,（相應泄流量為210m3/s)。該地區(qū)最大風速的多年平均值為16.9m/s,壩肩山頭較高，岸坡較陡。布置溢洪道泄槽處山坡坡度約為1:4，泄槽水平投影長約65m,泄槽寬8m。該地區(qū)地震基本烈度為度。地表為全風化粉砂巖，基巖為寒武系八村組粉粉砂巖強風化層。強風化層地基承載力標準

2、值可取500Kpa。由壩肩山頭較高，岸坡較陡可以知道，設計該溢洪道為側槽式溢洪道。 堰頂高程取30m.(1)計算測槽長度L.L=采取設計洪水位計算，式中Q溢洪道最大泄流量取150 m3/s，采取寬頂堰，則堰頂水頭H0=32-30=2m。流量系數(shù)m=0.35.測槽底坡i=0.1.代入數(shù)據(jù)：L=34.21m。（2）計算測槽末端水深。由設計地形(泄槽寬8m)可知, 測槽末端寬度bL=8m。起始斷面寬度與測槽末端寬度b0/bL采用0.5值，則起始斷面寬度b0=4m。測槽末端水深hL=(1.2-1.5)控制斷面水深hk。hk=q=/(s.m)1代入數(shù)據(jù)得hk= =3.4m.又查資料可知道bL/bO=5時

3、hL= 1.5 hk。bL/bO=1時hL= 1.2hk。而本設計中bL/bO=2，用內(nèi)插法求得hL= 1.275 hk。hL= 1.275 hk。=1.275*3.4=4.3m。（三）確定控制斷面坎高。控制斷面坎高d=(hL-hk)+(1+()hL=4.3m。 hk=3.4m.vL=3.44m/s。vk=代入數(shù)據(jù)得d=(4.3-3.4)+(1+() =-0.226m。由于d<0,故不設坎。注測槽斷面采用梯形設計。m1=m2=0.5.（四）計算各斷面流量。將測槽沿程劃分若干計算段，從起始段斷面起騙號（1,2,3,4,5,6）計算各斷面流量Qi=q*i.i=L/6=34.21/5=6.84

4、2m。q=Q/L=150/34.21=4.38m3/(s.m)則Q1=0m/sQ2=4.38*6.842=29.9592m/sQ3=4.38*(6.842*2)=59.9184m/sQ4=4.38*(6.842*3)=89.8776m/sQ5=4.38*(6.842*4)=119.8368m/sQ6=4.38*(6.842*5)=149.796m/s(五)測槽水面曲線計算。根據(jù)公式:hi=hi+1+y-i0Xi y=（V2-V1）+JX分別算出6個斷面的底寬。已知b1=4m，b6=8m。采用內(nèi)插法算出b2 b3 b4 b5 。算出b2。=4.8m. b3 =5.6m, b4=6.4m, b5

5、=7.2m.以第六和第五斷面為分析。由上解知道vL=3.44m/s。則v6=3.44m/s。V5=h5=h6+y-0.1*6.842先假設y=1。可以算出h5值來。再把h5值代入公式 y=（V2-V1）+JX中來驗算y值。改動y=1值，使驗算y值和假設假設y值相同接近，查看得h5=3.9058m.試算表格如下：5-6斷面h5b5A5X5R5Q5V53.90587.235.749415.933632.243644119.83683.3521353.91587.235.860515.955992.247463119.83683.3417493.94587.236.1944316.023082.25

6、8894119.83683.3109183.97587.236.5292516.090162.270285119.83683.2805713.95587.236.3059416.045442.262695119.83683.300749h6b6A6X6R6Q6V64.3843.64517.615092.477705149.7963.4321464.3843.64517.615092.477705149.7963.4321464.3843.64517.615092.477705149.7963.4321464.3843.64517.615092.477705149.7963.4321464.38

7、43.64517.615092.477705149.7963.432146(v5+v6)/2gv5+v6v6-v5Q6-Q5Q6+Q5V（56平均）R（56平均）J0.345783926.7842810.08001129.9592269.63283.39214032.3606742410.0010580.345254566.7738950.09039729.9592269.63283.3869472752.3625838240.0010540.343683196.7430640.12122729.9592269.63283.3715320562.3682993190.0010410.34213

8、6426.7127170.15157529.9592269.63283.3563582592.3739951230.0010280.343164896.7328950.13139629.9592269.63283.3664475722.3702000960.001036yy(驗證）0.290.295560.30.2982760.330.3062810.360.3140780.340.3089034-5斷面h4b4A4X4R4Q4V43.63166.429.836514.52052.05478489.87763.0123373.92166.432.7877115.168962.161589.87

9、762.7411983.52166.428.7390714.274542.0133189.87763.1273663.62166.429.7362314.498142.05103789.87763.0224943.57166.429.236414.386342.03223489.87763.074167h5b5A5X5R5Q5V53.90587.235.749415.933632.243644119.83683.3521353.90587.235.749415.933632.243644119.83683.3521353.90587.235.749415.933632.243644119.83

10、683.3521353.90587.235.749415.933632.243644119.83683.3521353.90587.235.749415.933632.243644119.83683.352135(v4+v5)/2gv4+v5v5-v4Q5-Q4Q5+Q4V（45平均）R（45平均）J0.324386966.3644720.33979829.9592209.71443.1822360952.1492137720.0010550.31056746.0933320.61093729.9592209.71443.0466662252.2025717140.0009360.330249

11、796.4795010.22476929.9592209.71443.2397504282.1284769880.0011080.324904656.3746290.3296429.9592209.71443.1873146642.1473404420.001060.327538356.4263020.27796729.9592209.71443.2131511762.137938570.001083yy(驗證）0.410.4123810.70.4664830.30.3875030.40.4102310.350.3991523-4斷面h3b3A3X3R3Q3V33.41745.624.9767

12、513.241541.88624259.91842.3989673.34745.624.3479813.085011.86075359.91842.4609183.44745.625.2477213.308621.89709559.91842.373223.54745.626.1574613.532231.93297559.91842.2906813.64745.627.077213.755831.96841659.91842.212873h4b4A4X4R4Q4V43.63166.429.836514.52052.05478489.87763.0123373.63166.429.836514

13、.52052.05478489.87763.0123373.63166.429.836514.52052.05478489.87763.0123373.63166.429.836514.52052.05478489.87763.0123373.63166.429.836514.52052.05478489.87763.012337(v3+v4)/2gv3+v4v4-v3Q4-Q3Q4+Q3V（34平均）R（34平均）J0.275805525.4113040.6133729.9592149.7962.7056521091.9705131530.0008560.278963085.4732560.

14、55141929.9592149.7962.7366278491.9577686360.0008840.274493235.3855570.63911729.9592149.7962.6927786141.9759396730.0008450.270286355.3030180.72165629.9592149.7962.6515090721.9938796830.000810.266320585.225210.79946529.9592149.7962.6126049292.0115999290.000777yy(驗證）0.470.4735240.40.4652390.50.4768760.

15、60.487260.70.4965452-3斷面h2b2A2X2R2Q2V23.17324.820.2659611.895491.70366729.95921.4783024.17324.828.7391614.131562.03368629.95921.0424525.17324.838.2123616.367632.3346329.95920.7840196.17324.848.6855618.603692.61698329.95920.6153617.17324.860.1587620.839762.8867329.95920.498002h3b3A3X3R3Q3V33.41745.62

16、4.9767513.241541.88624259.91842.3989673.41745.624.9767513.241541.88624259.91842.3989673.41745.624.9767513.241541.88624259.91842.3989673.41745.624.9767513.241541.88624259.91842.3989673.41745.624.9767513.241541.88624259.91842.398967(v2+v3)/2gv2+v3v3-v2Q3-Q2Q3+Q2V（23平均）R（23平均）J0.197618173.8772690.92066

17、529.959289.87761.9386342591.7949548460.0004980.175403623.4414191.35651529.959289.87761.7207095591.9599643860.0003490.162231683.1829851.61494829.959289.87761.5914927492.1104363820.000270.153635483.0143281.78360629.959289.87761.5071640112.2516128470.0002220.147653882.8969691.90096529.959289.87761.4484

18、8462.3864859610.00019yy(驗證）0.440.4407531.440.4415372.440.4359733.440.4299164.440.4245691-2斷面h1b1A1X1R1Q1V12.709414.5053410.057511.44224002.789415.0452610.236391.469781002.889415.7291610.461.503744002.989416.4230610.683611.537221003.089417.1269610.907211.57024200h2b2A2X2R2Q2V23.17324.820.2659611.8954

19、91.70366729.95921.4783023.17324.820.2659611.895491.70366729.95921.4783023.17324.820.2659611.895491.70366729.95921.4783023.17324.820.2659611.895491.70366729.95921.4783023.17324.820.2659611.895491.70366729.95921.478302(v1+v2)/2gv1+v2v2-v1Q2-Q1Q2+Q1V（12平均）R（12平均）J0.075346671.4783021.47830229.959229.959

20、20.7391508051.5729536588.63E-050.075346671.4783021.47830229.959229.95920.7391508051.5867243418.53E-050.075346671.4783021.47830229.959229.95920.7391508051.6037055498.41E-050.075346671.4783021.47830229.959229.95920.7391508051.6204439358.3E-050.075346671.4783021.47830229.959229.95920.7391508051.6369544

21、318.18E-05yy(驗證）0.220.2233610.30.2233540.40.2233460.50.2233380.60.22333由表格試算結果可以知道H1 =2.709mh2=3.1732m h3 =3.4174m h4=3.6316mh5 =3.9058mh6 =4.3m（六）泄槽計算。已知泄槽底寬為8m,采用矩形設計，邊坡i=1/4=0.25，泄槽水平投影長約65m。糙率n查水力學資料p136 表6-3 取n=0.012.采用分段求和法求各斷面水深列表如下：泄槽水面線計算過程及結果斷面系號h(m)A(m2)X（m)RCVj12345678j3.427.214.81.83783

22、892.229525.5147060.001945k324141.71428691.165946.250.002742l2.419.212.81.589.159437.81250.005119m2.217.612.41.41935588.3428.5227270.006557n216121.33333387.426269.3750.008624o1.814.411.61.24137986.391210.416670.011712p1.612.811.21.14285785.2087311.718750.01655q1.411.210.81.03703783.8399713.392860.024

23、607r1.29.610.40.92307782.2290115.6250.039116s0.99867.98889.99720.79910480.2760418.776290.068461V2/2gEsEsJi-JLL91011121314151.550054.950051.9909534.9909530.0409030.0023430.2476570.1651610.1651613.1108645.5108640.5199110.003930.246072.112862.2780213.7021865.9021860.3913210.0058380.2441621.6027123.8807324.4796446.4796440.5774590.0075910.2424092.3821666.2628995.5304257.3304250.8507810.0101680.2398323.5474019.81036.9994458.5994451.2690190.0141310.2358695.38018315.190489.14213210.542131.9426870.0205780.2294228.46775823.6582412.4434613.643463.1013250.0318610.218139