crest flow 中文意思是什麼
crest flow
解釋
洪峰流量-
Multiple functions available ： start / crater arc current, increase / decrease time, base / crest value current, pulse frequency, pulse rate, post flow time, hf welding
功能豐富：起始/收弧電流、上升/下降時間、基值電流、峰直電流、脈沖頻率、占空比、滯后關氣時間分別可調，高頻引弧。 -
Multiple funcyions available : start / crater arc current, increase / decrease time, base, crest value current, pulse frequency, pulse rate, post flow time, hf / friction welding, water / gas cooling
功能豐富：起始/收弧電流、上升/下降時間、基值電流、峰值電流、脈沖頻率、占空比、滯后關氣時間分別可調，高頻/接觸引弧、水冷/氣冷可供選用。 -
Many geological and hydrological factors of the river section, where the yellow river water intake engineering is laid out, such as the capacity of the reservoirs along the river section upstream and downstream, the rate of the flow discharge, the erosion and silt of the watercourse, the form of the riverbed and the water current, ice tuck, the convergence of the upstream branches of the river section, flood crest, sand crest size, the capacity for flood discharge of the watercourse, the effect of flood control structure around and the impacts on surrounding environment and the third person " s legitimate rights and interests, should be considered
黃河取水工程的布設要考慮工程所處河段的地質水文等諸多因素。如該河段上下游水庫的庫容，泄水流量、河道沖刷、淤積、河床形態、水流形態、冰塞、河段上游的支流匯入、洪峰、沙峰的大小、河道行洪能力的大小、周圍防洪工程的影響及對周圍環境和第三人合法權益的影響等等。 -
During the construction of concrete cut - off wall of the auxiliary dam in huangbizhuang reservoir, in the section with complex geographical condition, especially the closure section of concrete cut - off wall ( about 120m ), the deterioration of the underground water ' s flow state and the existence of the overseep channel in the stratum result in the several collapses in the dam crest. through the analysis of ever } 1 collapse ' s reason, the proposal of handling measure and its effect, the paper expounds and proves that the cut - off wall can be safely constructed and devoted into normal usage after dealing with collapse. the psper improves the construction technique and method of concrete cut - off wall especially under complex geological condition and in the overseep stratum
本文通過對歷次塌坑的原因分析及歷次塌坑處理措施的提出和對歷次塌坑處理效果的分析，論證了塌坑處理後防滲墻能安全施工和投入正常運用；完善了在復雜地質條件及強滲漏地層混凝土防滲墻的施工工藝和施工方法；提出了對病險水庫加固及在地質條件復雜地層中修建混凝土防滲墻的施工要點；同時提出了在強滲漏地層修建防滲墻的關鍵是在防滲墻施工前通過預注漿封閉強滲漏通道的重要論點；對塌坑一些處理措施中的不足之處亦進行了分析研究，供國內類似工程借鑒。 -
( 2 ) validate whether the crest elevation can meet the require of energy dissipation and erosion prevention during the beginning period of flood discharge. ( 3 ) calculate the altitude of downriver cofferdam, and make it meet the require of energy dissipation and erosion prevention. ( 4 ) calculate some average velocity of flow through some sections, including contracted section in stilling basins behind upriver cofferdam, if the hydraulic jump happen in lower reaches of the river. the program will calculate the average velocity of flow of contracted section and the length of the apron
主要設計內容包括：計算上游圍堰后消力池的尺寸；驗證泄洪初期壩面高程是否能夠滿足消能防沖需要；計算下游圍堰堰頂高程，使其滿足泄洪期圍堰和壩體過流的消能防沖和工程進度的需要；計算部分斷面平均流速，包括：上游圍堰后消力池中收縮斷面的斷面平均流速；壩首和壩末的斷面平均流速；當下遊河道發生水躍時，計算下遊河道的收縮斷面平均流速及需要鋪設護坦的長度。
分享友人