【摘要】：南水北調(diào)工程寶郟段位于南水北調(diào)工程中線工程的河南省境內(nèi)。寶郟段的襯砌結構采用了特殊的防滲保溫結構，其中，噴砂加糙保溫板提高了襯砌結構的抗凍性，改善了渠道在低溫下的工作條件；復合土工膜提高了輸水效率。但是，由于這種新型結構的材料屬性復雜，接觸層面較多，加上復雜的自然與地質(zhì)因素，整體結構的穩(wěn)定性有必要要進一步深入研究。 本文以南水北調(diào)工程寶郟段位渠道襯砌為研究對象，自下而上分別對渠道襯砌結構的各個組成部分進行了分析。通過瑞典條分法和ANSYS數(shù)值模擬，分析了渠道邊坡和襯砌土體的穩(wěn)定性，，結果表明，1:2的邊坡具有足夠大的安全系數(shù)，能滿足工程穩(wěn)定的需要；研究了保溫板在結構中的作用，熱穩(wěn)態(tài)分析與熱瞬態(tài)分析均證明，保溫板在控制熱量傳遞中具有較大作用，并通過熱量分度云圖的溫度等值線對保溫板的厚度選擇進行了優(yōu)化；數(shù)值模擬表明，對于混凝土層無論是在自然狀態(tài)下還是在凍脹的狀態(tài)下，襯砌的坡腳與齒墻接觸部分都是應力集中現(xiàn)象最明顯的部位，有必要對齒墻結構進行優(yōu)化設計；建立了凍脹作用下混凝土層受力模型，計算了其在特定環(huán)境下彎矩的分布，發(fā)現(xiàn)襯砌板的距下邊1/4處彎矩最大。最后，以室內(nèi)摩擦試驗結果和數(shù)值模擬為基礎，分析了渠道襯砌結構中可能出現(xiàn)滑移的原因。
[Abstract]:The treasure section of the South-to-North Water transfer Project is located in Henan Province, the middle route of the South-to-North Water transfer Project. The lining structure of Baoji section adopts special anti-seepage and heat preservation structure, among which, sand blasting and rough insulation board improve the frost resistance of the lining structure, improve the working conditions of the canal at low temperature, and the composite geomembrane improves the water transfer efficiency. However, the stability of the whole structure should be further studied because of its complex material properties, more contact layers and complicated natural and geological factors. This paper takes the channel lining of Baojiazhang Section of South-to-North Water transfer Project as the research object, and analyzes each component of the channel lining structure from the bottom to the top. The stability of channel slope and lining soil is analyzed by Swedish slice method and ANSYS numerical simulation. The results show that the 1:2 slope has enough safety factor to meet the need of engineering stability. The function of thermal insulation board in structure is studied. It is proved by thermal steady state analysis and thermal transient analysis that thermal insulation board plays an important role in controlling heat transfer, and the thickness selection of thermal insulation board is optimized by the temperature isoline of heat index cloud diagram. The numerical simulation shows that the contact part between the slope foot and the tooth wall of the lining is the most obvious part of the stress concentration, so it is necessary to optimize the design of the tooth wall structure. The stress model of concrete layer under frost heaving is established, and the bending moment distribution in specific environment is calculated. It is found that the bending moment of lining slab is the largest at 1 / 4 below. Finally, based on the results of indoor friction test and numerical simulation, the possible causes of slip in the tunnel lining structure are analyzed.
【學位授予單位】：鄭州大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TV672;TV543

【參考文獻】

相關期刊論文 前10條

1 銀英姿;王英浩;宋云馳;;渠系水工建筑物保溫措施的研究及計算機模擬[J];內(nèi)蒙古科技大學學報;2007年02期

2 張彥武;;聚苯乙烯泡沫板在渠道防凍脹中的運用[J];甘肅水利水電技術;2009年01期

3 田淑娟;;南水北調(diào)中線工程土工合成材料摩擦特性試驗分析[J];水科學與工程技術;2012年02期

4 何武全,邢義川,蔡明科,劉三虎;渠道防滲抗凍新材料與新技術[J];節(jié)水灌溉;2003年01期

5 馮廣志,周福國,季仁保;渠道防滲襯砌技術發(fā)展中的若干問題與建議[J];節(jié)水灌溉;2004年05期

6 銀英姿;申向東;步豐湖;苗金和;;凍土區(qū)渠道保溫防凍措施對比研究[J];內(nèi)蒙古農(nóng)業(yè)大學學報(自然科學版);2010年04期

7 王正中;李甲林;陳濤;郭利霞;姚汝方;;弧底梯形渠道砼襯砌凍脹破壞的力學模型研究[J];農(nóng)業(yè)工程學報;2008年01期

8 王正中;蘆琴;郭利霞;楊成有;楊富元;;基于晝夜溫度變化的混凝土襯砌渠道凍脹有限元分析[J];農(nóng)業(yè)工程學報;2009年07期

9 李振卿,李書民,王建偉;南水北調(diào)中線總干渠設計凍脹量的計算[J];河北水利水電技術;2001年01期

10 嚴增才;李振卿;;南水北調(diào)中線工程總干渠(河北段)混凝土襯砌防凍脹設計技術[J];南水北調(diào)與水利科技;2008年01期

本文編號：2303682