【摘要】：襯砌渠道有各種各樣的斷面形式,為了適應(yīng)不同斷面形式的裝配式襯砌渠道的發(fā)展和應(yīng)用,本文采用拉格朗日乘子法建立水力最優(yōu)斷面的數(shù)學(xué)模型,利用渠道均勻流的曼寧方程式,對U型渠道的四種斷面形式(弧斜邊形、橢圓直線形、拋物線形、懸鏈線形)水力最優(yōu)斷面進行了推導(dǎo),得到當四種斷面形式取得水力最優(yōu)斷面時,斷面參數(shù)之間的關(guān)系。然后對四種斷面形式的水力最優(yōu)斷面進行典型設(shè)計,使用對比優(yōu)選的方法,得到設(shè)計時的最優(yōu)排序,經(jīng)對比可知：在設(shè)計時若以水力最優(yōu)斷面為基礎(chǔ),對四種U型渠道進行設(shè)計,在同一水流條件下(即過水流量,渠道縱向坡度,渠道糙率相等),圓弧斜邊形渠道的過水斷面面積最小,懸鏈線渠道的過水斷面面積最大；懸鏈線渠道的過水斷面水深最大,橢圓直線形渠道斷面開挖深度最��；懸鏈線形渠道的斷面水面寬度最大,圓弧斜邊形渠道的斷面水面寬度最小。同時也可以得到如下結(jié)論：懸鏈線形渠道斷面過水斷面面積、水深、水面寬度均為最大,在實際應(yīng)用中不推薦使用(特殊情況除外)；圓弧斜邊形、橢圓直線形渠道各有各的優(yōu)勢,若工程項目要求節(jié)約土地、減少土方開挖,優(yōu)先推薦使用圓弧斜邊形渠道,若工程項目開挖深度上有限制,優(yōu)先推薦使用橢圓直線形渠道。各種斷面的U型裝配式渠道在應(yīng)用時也同時需要在渠道縱向上進行設(shè)計,要求渠道在設(shè)計條件下工作時,渠道不發(fā)生沖淤或沖淤平衡且流態(tài)穩(wěn)定。但是在應(yīng)用中U型裝配式渠道常因各種原因產(chǎn)生槽片間錯動,造成渠道流態(tài)不穩(wěn)發(fā)生沖淤,因此防止槽片錯動也是也成為本文研究應(yīng)用的重點。為減少槽片間錯動,增強裝配式渠道的整體性,本文參考市政工程中的混凝土排水管道連接構(gòu)造原理,優(yōu)化設(shè)計出承插式帶肋U形混凝土渠道的連接構(gòu)造,使其具有抗?jié)B漏、防止了槽間錯動、提高U形槽的抗彎承載力、增強渠道的縱向抗滑能力、經(jīng)濟適用等優(yōu)點。
[Abstract]:Lining canal has various cross-section forms. In order to adapt to the development and application of prefabricated lining channel with different cross-section forms, the Lagrange multiplier method is used to establish the mathematical model of hydraulic optimal section in this paper. Based on the Manning equation of uniform flow in the channel, the hydraulic optimal section of U-shaped channel (arc bevel, elliptical straight line, parabola, catenary) is derived. The relationship between the parameters of the section is obtained when the hydraulic optimum section is obtained by four cross-section forms. Then the typical design of the hydraulic optimum section of four kinds of section forms is carried out, and the optimal order of the design time is obtained by using the method of contrast optimum selection. By comparison, we can know that if the hydraulic optimum section is used as the basis of the design, Four kinds of U-shaped channels are designed. Under the same flow conditions (i.e., overwater flow, channel longitudinal slope, channel roughness is equal), the cross section area of circular arc inclined channel is the smallest, and that of catenary channel is the largest. The depth of cross section of catenary channel is the largest, the depth of excavation of elliptical linear channel is the smallest, and the width of catenary channel is the largest, and that of circular arc inclined channel is the smallest. At the same time, the following conclusions can be obtained: the cross section area, water depth and water surface width of catenary channel section are the largest, which is not recommended in practical application (except for special cases); If the project requires saving land and reducing earthwork excavation, the preferred use of circular arc slanting channel, if the excavation depth of the project is limited, Preferred use of elliptical straight channel. At the same time, the U-shaped prefabricated channel with various cross-sections needs to be designed in longitudinal direction, which requires that there is no erosion and siltation or balance of scour and deposition and steady flow state when the channel works under the design conditions. However, in the application of U-shaped fabricated channel, inter-slot dislocation is often caused by various reasons, resulting in channel flow instability occurred scour and deposition, so the prevention of slot plate dislocation is also the focus of this research and application. In order to reduce the dislocation between slots and enhance the integrity of the assembled channel, this paper, referring to the principle of connection construction of the concrete drainage pipe in municipal engineering, optimizes the design of the connecting structure of the bearing type U-shaped concrete channel with ribs, so that it has anti-leakage. It has the advantages of preventing the dislocation between the slots, improving the bending capacity of the U-shaped groove, enhancing the longitudinal anti-slide ability of the channel, and being economical and applicable.
【學(xué)位授予單位】：揚州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TV133

【相似文獻】

相關(guān)期刊論文 前10條

1 呂宏興,呂德生,史菊蘭;U形渠道斷面測流方法[J];中國農(nóng)村水利水電;2001年07期

2 Lawrence E. Flynn;付敏;;渠道斷面優(yōu)化設(shè)計[J];江西水利科技;1991年02期

3 宋杰;;不同結(jié)構(gòu)形式渠道的參數(shù)分析[J];中國科技信息;2007年12期

4 黎偉萍;;灌區(qū)渠道斷面設(shè)計參數(shù)的選取方法[J];中國西部科技;2010年01期

5 張開泉;穩(wěn)定渠道的斷面形狀[J];泥沙研究;1986年03期

6 吳寧;;U型斷面渠道水力計算的方法步驟[J];科技信息;2010年17期

7 趙延風;王正中;劉計良;;拋物線類渠道斷面收縮水深的計算通式[J];水力發(fā)電學(xué)報;2013年01期

8 王雙;周淑杰;;圓弧底渠道斷面的水力近似計算[J];水利科技與經(jīng)濟;2010年03期

9 張開泉;穩(wěn)定渠道的斷面形狀[J];石河子農(nóng)學(xué)院學(xué)報;1986年01期

10 劉菊英;用Qbasic程序計算渠道斷面水深[J];青海師范大學(xué)學(xué)報(自然科學(xué)版);2003年03期

相關(guān)碩士學(xué)位論文 前4條

1 黃偉;多種U型渠道水力最優(yōu)斷面及應(yīng)用[D];揚州大學(xué);2015年

2 董麗娜;灌區(qū)渠道斷面優(yōu)化設(shè)計程序開發(fā)與研究[D];東北農(nóng)業(yè)大學(xué);2010年

3 劉彥君;黑龍江省北部引嫩工程渠道沖淤成因及綜合防治措施的研究[D];東北農(nóng)業(yè)大學(xué);2003年

4 董文明;基于ExcelVBA技術(shù)開發(fā)交互式渠道輔助設(shè)計程序的應(yīng)用研究[D];新疆農(nóng)業(yè)大學(xué);2008年

，

本文編號：2386380