【正文】
? — 波浪以上的安全超高( 按表 23 取值 , Ⅴ 級(jí)圍堰對(duì)應(yīng)的 ? 取 ), m。 ② 河床中永久建筑物便于布置導(dǎo)流泄水建筑物。本工程圍堰洪 設(shè)計(jì)流量采用 P=50%平水年平均流量 m3 /s。二期圍河床右岸,建造非溢流壩段和剩下的溢流壩段,河水由一期預(yù)留的壩體缺口導(dǎo)流。隧洞轉(zhuǎn)彎半徑ρ =100m,隧洞轉(zhuǎn)角 θ=35176。;隧洞出口與主河流交角為 α=30176。護(hù)坡厚度選為 米下設(shè) 米的墊層;斜墻長(zhǎng)度 這里取 4 倍水頭,接頭處取三米;斜墻不堰體之間設(shè)置反濾層,其厚一般為 米,厚度這里取為 米。 斜墻不堰體之間設(shè)置 1米反濾層 . ( 2) 隧洞 設(shè)計(jì) 洞軸線長(zhǎng) l=,隧洞進(jìn)口與主河流交角為 α=34176。 ⑤ 一期河床束窄系數(shù) K一般為 40%~ 60%。 導(dǎo)流方案介紹 采用全段圍堰法方案介紹 全段圍堰法采用三種方案。 分段圍堰法亦稱(chēng)分期圍堰法,就是用圍堰將水工建筑物分段分期圍護(hù)起來(lái)進(jìn)行施工的方法。 表 22 導(dǎo)流建筑物洪水標(biāo)準(zhǔn)劃分表 導(dǎo)流建筑物類(lèi)型 導(dǎo)流建筑物級(jí)別 3 4 5 洪水重現(xiàn)期(年) 土 石 50— 20 20— 10 10— 5 混 凝 土 20— 10 10— 5 5— 3 根據(jù)當(dāng)?shù)囟嗄炅髁壳闆r,及最近幾年來(lái)洪水期情況,其設(shè)計(jì)流量取平水年設(shè)計(jì)代表年徑流量 Q= 圍堰堰頂高程以上的超高 d 土石圍堰堰頂在設(shè)計(jì)洪水靜水位以上應(yīng)有一段超高,其高度應(yīng)當(dāng)避免頂溢流的一切可能性。取水樞紐為漿砌石重力壩。 板巖風(fēng)化土:左岸沿公路高程有豐富的板巖風(fēng)化土、殘坡積物等可做土料產(chǎn)地。 兩岸植被較好,水土流失不嚴(yán)重,在雨季河水較渾濁,一般季節(jié)河水清澈,含砂量小,淤積源有限,但為保證有效庫(kù)容應(yīng)有排沙設(shè)施。 設(shè)計(jì)洪水計(jì)算采用經(jīng)驗(yàn)公式: Q 設(shè) =( F 設(shè) /F 參 ) nQ 參 ( 11) 式中: Q 參 —— 參證站平均年最大洪峰流量( Q 參 =216m3/s); Q 設(shè) —— 設(shè)計(jì)站平均年最大洪峰流量( m3/s); F 參 —— 參證站流域面積( F 參 =2841km2); F 設(shè) —— 設(shè)計(jì)站流域面積 (F 設(shè) =)。 水文基本資料 柳村河流域內(nèi)沒(méi)有水文站和雨量站,本次設(shè)計(jì)分別 采用白玉水文站和桃園子水文站作為參證站。 電站 的建設(shè),可解決左貢縣城以及郊區(qū)設(shè)計(jì)水平年( 2021 年)及遠(yuǎn)景設(shè)計(jì)水平年( 2021 年)的照明電炊、取暖、部分農(nóng)副產(chǎn)品加工、文化教育、行政等方面用電。 37 鋼筋加工 36 冬季保溫養(yǎng)護(hù) 36 混凝土的養(yǎng)護(hù)工藝 35 高溫季節(jié)施工 34 混凝土的振搗 28 骨料 27 柳村電站混凝土概述 24 3 專(zhuān)題設(shè)計(jì):主體工程施工 4 天然建筑材料 4 地質(zhì) 3 設(shè)計(jì)洪水 s safety of life and property of low reaches . Is it expound the fact Liucun power station construct water conservancy diversion , form , structural design and steady analysis ,concert construction ,etc. of cofferdam , water conservancy diversion of building mainly to design originally. The hydropower station of Liucun lies within the boundaries of Zuogong county of Qamdo Prefecture of Tibet on Nujiang first class tributary Yuqu river, for not regulating the smallscale power station of the type after the dam. Hydropower station by dam, release floodwater building , channel water the building and hydropower station factory building make up. Design installed capacity 2 800kW , always constructs for 2 years of time limit. This pivot water conservancy diversion building V grade, hydropower station construct water conservancy diversion adopt and design the flow of flood crest while being the first stage of , adopt and does not design flow in flood season non while being the second stage of , adopt the intergrity cofferdamdam and hierarchic cofferdamdam methods to 6 argumentation of scheme separately, prove through technology and economy , is it hierarchic cofferdamdam methods to adopt finally. cofferdamdam material adopt grass soil bag, geotechnological cloth prevention of seepage, through is it slip steady analysis to resist, the cofferdam accords with the design standard. The concrete construction anization designs include theconcrete configuration, concrete constructing, the concrete temperature control, concrete maintenance, the steel bar and the template work and so on. The hydropower station of Liucun plants key position for lays with mortar the stone hard shell dam,The concrete construction mainly in the power plant workshop dam section, overflows the flow surface, upstream the kneading board and the downriver