側(cè)槽溢洪道設(shè)計(jì)

目錄TOC\o"1-1"\h\z\u資料：2(一)計(jì)算測(cè)槽長(zhǎng)度L.3〔二〕計(jì)算測(cè)槽末端水深。3〔三〕確定控制斷面坎高。4〔四〕計(jì)算各斷面流量。5(五)測(cè)槽水面曲線計(jì)算。6〔六〕泄槽計(jì)算。13〔七〕泄槽橫斷面布置15〔八〕消能防沖設(shè)計(jì)16資料：某大〔2〕型水庫(kù)，正常蓄水位為30m,設(shè)計(jì)洪水位為32m(相應(yīng)泄流量為150m3/s),校核洪水位33.43m,〔相應(yīng)泄流量為210m3/s)。該地區(qū)最大風(fēng)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(zhǎng)約65m,泄槽寬8m。該地區(qū)地震根本烈度為Ⅵ度。地表為全風(fēng)化粉砂巖，基巖為寒武系八村組粉粉砂巖強(qiáng)風(fēng)化層。強(qiáng)風(fēng)化層地基承載力標(biāo)準(zhǔn)值可取500Kpa。由壩肩山頭較高，岸坡較陡可以知道，設(shè)計(jì)該溢洪道為側(cè)槽式溢洪道。堰頂高程取30m.(1)計(jì)算測(cè)槽長(zhǎng)度L.L=采取設(shè)計(jì)洪水位計(jì)算，式中Q溢洪道最大泄流量取150m3/s，采取寬頂堰，那么堰頂水頭H0=32-30=2m。流量系數(shù)m=0.35.測(cè)槽底坡i=0.1.代入數(shù)據(jù)：L===34.21m?！?〕計(jì)算測(cè)槽末端水深。由設(shè)計(jì)地形(泄槽寬8m)可知,測(cè)槽末端寬度bL=8m。起始斷面寬度與測(cè)槽末端寬度b0/bL采用0.5值，那么起始斷面寬度b0=4m。測(cè)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(shí)hL=1.5hk。bL/bO=1時(shí)hL=1.2hk。而本設(shè)計(jì)中bL/bO=2，用內(nèi)插法求得hL=1.275hk。hL=1.275hk。=1.275*3.4=4.3m?！踩炒_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(shè)坎。注測(cè)槽斷面采用梯形設(shè)計(jì)。m1=m2=0.5.〔四〕計(jì)算各斷面流量。將測(cè)槽沿程劃分假設(shè)干計(jì)算段，從起始段斷面起騙號(hào)〔1,2,3,4,5,6〕計(jì)算各斷面流量Qi=q*i.i=L/6=34.21/5=6.842m。q=Q/L=150/34.21=4.38m3/(s.m)那么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(cè)槽水面曲線計(jì)算。根據(jù)公式:hi=hi+1+△y-i0△Xiy=[〔V2-V1〕++J△X]分別算出6個(gè)斷面的底寬。b1=4m，b6=8m。采用內(nèi)插法算出b2b3b4b5。算出b2。=4.8m.b3=5.6m,b4=6.4m,b5=7.2m.以第六和第五斷面為分析。由上解知道vL=3.44m/s。那么v6=3.44m/s。V5==h5=h6+△y-0.1*6.842先假設(shè)△y=1?？梢运愠鰄5值來(lái)。再把h5值代入公式y(tǒng)=[〔V2-V1〕++J△X]中來(lái)驗(yàn)算△y值。改動(dòng)△y=1值，使驗(yàn)算△y值和假設(shè)假設(shè)△y值相同接近，查看得h5=3.9058m.試算表格如下：5-6斷面h5b5A5X5R5Q5V53.90587.235.749415.933632.243644119.83683.3521353.91587.235.860515.955992.247463119.83683.3417493.94587.236.1944316.023082.258894119.83683.3109183.97587.236.5292516.090162.270285119.83683.2805713.95587.236.3059416.045442.262695119.83683.300749h6b6A6X6R6Q6V64.3843.64517.615092.477705149.7963.4321464.3843.64517.615092.477705149.7963.4321464.3843.64517.615092.477705149.7963.4321464.3843.64517.615092.477705149.7963.4321464.3843.64517.615092.477705149.7963.432146(v5+v6)/2gv5+v6v6-v5Q6-Q5Q6+Q5V〔56平均〕R〔56平均〕J0.345783926.7842810.08001129.9592269.63283.39214032.3606742410.0010580.345254566.7738950.09039729.9592269.63283.3869472752.3625838240.0010540.343683196.7430640.12122729.9592269.63283.3715320562.3682993190.0010410.342136426.7127170.15157529.9592269.63283.3563582592.3739951230.0010280.343164896.7328950.13139629.9592269.63283.3664475722.3702000960.001036△y△y(驗(yàn)證〕0.290.295560.30.2982760.330.3062810.360.3140780.340.3089034-5斷面h4b4A4X4R4Q4V43.63166.429.836514.52052.05478489.87763.0123373.92166.432.7877115.168962.161589.87762.7411983.52166.428.7390714.274542.0133189.87763.1273663.62166.429.7362314.498142.05103789.87763.0224943.57166.429.236414.386342.03223489.87763.074167h5b5A5X5R5Q5V53.90587.235.749415.933632.243644119.83683.3521353.90587.235.749415.933632.243644119.83683.3521353.90587.235.749415.933632.243644119.83683.3521353.90587.235.749415.933632.243644119.83683.3521353.90587.235.749415.933632.243644119.83683.352135(v4+v5)/2gv4+v5v5-v4Q5-Q4Q5+Q4V〔45平均〕R〔45平均〕J0.324386966.3644720.33979829.9592209.71443.1822360952.1492137720.0010550.31056746.0933320.61093729.9592209.71443.0466662252.2025717140.0009360.330249796.4795010.22476929.9592209.71443.2397504282.1284769880.0011080.324904656.3746290.3296429.9592209.71443.1873146642.1473404420.001060.327538356.4263020.27796729.9592209.71443.2131511762.137938570.001083△y△y(驗(yàn)證〕0.410.4123810.70.4664830.30.3875030.40.4102310.350.3991523-4斷面h3b3A3X3R3Q3V33.41745.624.9767513.241541.88624259.91842.3989673.34745.624.3479813.085011.86075359.91842.4609183.44745.625.2477213.308621.89709559.91842.373223.54745.626.1574613.532231.93297559.91842.2906813.64745.627.077213.755831.96841659.91842.212873h4b4A4X4R4Q4V43.63166.429.836514.52052.05478489.87763.0123373.63166.429.836514.52052.05478489.87763.0123373.63166.429.836514.52052.05478489.87763.0123373.63166.429.836514.52052.05478489.87763.0123373.63166.429.836514.52052.05478489.87763.012337(v3+v4)/2gv3+v4v4-v3Q4-Q3Q4+Q3V〔34平均〕R〔34平均〕J0.275805525.4113040.6133729.9592149.7962.7056521091.9705131530.0008560.278963085.4732560.55141929.9592149.7962.7366278491.9577686360.0008840.274493235.3855570.63911729.9592149.7962.6927786141.9759396730.0008450.270286355.3030180.72165629.9592149.7962.6515090721.9938796830.000810.266320585.225210.79946529.9592149.7962.6126049292.0115999290.000777△y△y(驗(yàn)證〕0.470.4735240.40.4652390.50.4768760.60.487260.70.4965452-3斷面h2b2A2X2R2Q2V23.17324.820.2659611.895491.70366729.95921.4783024.17324.828.7391614.131562.03368629.95921.0424525.17324.838.2123616.367632.3346329.95920.7840196.17324.848.6855618.603692.61698329.95920.6153617.17324.860.1587620.839762.8867329.95920.498002h3b3A3X3R3Q3V33.41745.624.9767513.241541.88624259.91842.3989673.41745.624.9767513.241541.88624259.91842.3989673.41745.624.9767513.241541.88624259.91842.3989673.41745.624.9767513.241541.88624259.91842.3989673.41745.624.9767513.241541.88624259.91842.398967(v2+v3)/2gv2+v3v3-v2Q3-Q2Q3+Q2V〔23平均〕R〔23平均〕J0.197618173.8772690.92066529.959289.87761.9386342591.7949548460.0004980.175403623.4414191.35651529.959289.87761.7207095591.9599643860.0003490.162231683.1829851.61494829.959289.87761.5914927492.1104363820.000270.153635483.0143281.78360629.959289.87761.5071640112.2516128470.0002220.147653882.8969691.90096529.959289.87761.44848462.3864859610.00019△y△y(驗(yàn)證〕0.440.4407531.440.4415372.440.4359733.440.4299164.440.4245691-2斷面h1b1A1X1R1Q1V12.709414.5053410.057511.44224002.789415.0452610.236391.469781002.889415.7291610.461.503744002.989416.4230610.683611.537221003.089417.1269610.907211.57024200h2b2A2X2R2Q2V23.17324.820.2659611.895491.70366729.95921.4783023.17324.820.2659611.895491.70366729.95921.4783023.17324.820.2659611.895491.70366729.95921.4783023.17324.820.2659611.895491.70366729.95921.4783023.17324.820.2659611.895491.70366729.95921.478302(v1+v2)/2gv1+v2v2-v1Q2-Q1Q2+Q1V〔12平均〕R〔12平均〕J0.075346671.4783021.47830229.959229.95920.7391508051.5729536588.63E-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-050.075346671.4783021.47830229.959229.95920.7391508051.6369544318.18E-05△y△y(驗(yàn)證〕0.220.2233610.30.2233540.40.2233460.50.2233380.60.22333由表格試算結(jié)果可以知道H1=2.709mh2=3.1732mh3=3.4174mh4=3.6316mh5=3.9058mh6=4.3m〔六〕泄槽計(jì)算。泄槽底寬為8m,采用矩形設(shè)計(jì)，邊坡i=1/4=0.25，泄槽水平投影長(zhǎng)約65m。糙率n查水力學(xué)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(jì)算過(guò)程及結(jié)果斷面系號(hào)h(m)A(m2)X〔m)RCVj123456783.427.214.81.83783892.229525.5147060.001945324141.71428691.165946.250.0027422.419.212.81.589.159437.81250.0051192.217.612.41.41935588.3428.5227270.006557216121.33333387.426269.3750.0086241.814.411.61.24137986.391210.416670.0117121.612.811.21.14285785.2087311.718750.016551.411.210.81.03703783.8399713.392860.0246071.29.610.40.92307782.2290115.6250.0391160.99867.98889.99720.79910480.2760418.776290.068461V^2/2gEs△EsJi-J△L∑△L91011121314151.550054.950051.9909534.9909530.0409030.0023430.2476570.1651610.1651613.1108645.5108640.5199110.003930.246072.112862.2780213.7021865.9021860.3913210.0058380.2441621.6027123.8807324.4796446.4796440.5774590.0075910.2424092.3821666.2628995.5304257.3304250.8507810.0101680.2398323.5474019.81036.9994458.5994451.2690190.0141310.2358695.38018315.190489.14213210.542131.9426870.0205780.2294228.46775823.6582412.4434613.643463.1013250.0318610.21813914