【摘要】：隨著我國(guó)經(jīng)濟(jì)快速發(fā)展，對(duì)能源的需求也越來(lái)越大，水利發(fā)電得到了大力發(fā)展。引水隧洞作為水電站發(fā)電不可或缺的重要組成部分，引水隧洞襯砌結(jié)構(gòu)受力情況和穩(wěn)定性一直是我們研究的重要課題。隨著我國(guó)水利水電工程的快速發(fā)展，引水隧洞洞身長(zhǎng)度越來(lái)越長(zhǎng)，埋深也越來(lái)越深，工程地質(zhì)情況越來(lái)越復(fù)雜，這都對(duì)于引水隧洞襯砌結(jié)構(gòu)的受力情況的分析有了更嚴(yán)格的要求。 本文以齊熱哈塔爾水電站工程引水隧洞為背景，主要研究不同引水隧洞斷面襯砌受力特征，以及圓形引水隧洞在不同工況下襯砌受力特征情況。本位主要工作如下： (1)本文在研究大量的國(guó)內(nèi)外水工隧洞襯砌結(jié)構(gòu)的基礎(chǔ)上，采用了有限元的方法，建立了合理齊熱哈塔爾水電站的水工隧洞模型，計(jì)算荷載作用下的隧洞襯砌受力，對(duì)計(jì)算結(jié)果進(jìn)行了合理的分析。 (2)水工隧洞采用圓形斷面和馬蹄形斷面進(jìn)行比較，用ANSYS有限元軟件建立齊熱哈塔爾水電站引水隧洞斷面為圓形和馬蹄形的二維隧洞模型，通過(guò)有限元的計(jì)算求解，，得出這兩種斷面襯砌受力情況。對(duì)比分析兩者的受力情況，可以看出圓形斷面上支護(hù)襯砌受力分布比較均勻，沒(méi)有明顯的應(yīng)力集中現(xiàn)象。馬蹄形斷面上支護(hù)襯砌受力分布不是特別均勻，在拱底兩側(cè)的底腳處有明顯的受力變大的情況，在這里出現(xiàn)了應(yīng)力集中的現(xiàn)象。這對(duì)工程的安全運(yùn)行不利。 (3)采用混凝土對(duì)水工隧洞圓形斷面進(jìn)行襯砌，用ANSYS有限元軟件模擬不同的圍巖情況下，各工況中襯砌結(jié)構(gòu)的受力情況。分析各種不同圍巖類型、不同襯砌厚度、不同工況下，襯砌結(jié)構(gòu)受力和變形情況。
[Abstract]:With the rapid development of economy in China, the demand for energy is increasing, and hydropower has been greatly developed. Diversion tunnel is an indispensable part of hydropower station power generation. The stress and stability of lining structure of diversion tunnel has been an important subject of our research. With the rapid development of water conservancy and hydropower projects in China, the length of diversion tunnel is getting longer and longer, and the buried depth is getting deeper and deeper, and the engineering geological situation is becoming more and more complex. This has more strict requirements for the analysis of the stress on the lining structure of the diversion tunnel. Based on the background of diversion tunnel of Zizehattar Hydropower Station, this paper mainly studies the stress characteristics of lining in different sections of diversion tunnel and the stress characteristics of lining of circular diversion tunnel under different working conditions. The main work of the standard is as follows: (1) based on the study of a large number of domestic and foreign hydraulic tunnel lining structures, the finite element method is used to establish a reasonable hydraulic tunnel model of Zizehattar Hydropower Station. The stress of tunnel lining under load is calculated and the calculated results are analyzed reasonably. (2) the circular section and horseshoe section of hydraulic tunnel are compared. A two-dimension tunnel model with circular and horseshoe section of diversion tunnel of Zizehattar Hydropower Station is established by using ANSYS finite element software. Through the calculation of finite element method, the stress on the lining of these two sections is obtained. The stress distribution of the lining on the circular section is uniform and there is no obvious stress concentration phenomenon. The stress distribution of the lining on the horseshoe section is not particularly uniform, and the stress concentration appears at the bottom foot on both sides of the arch. This is unfavorable to the safe operation of the project. (3) the lining of the circular section of the hydraulic tunnel is made with concrete, and the stress of the lining structure under different working conditions is simulated by ANSYS finite element software. The stress and deformation of lining structure are analyzed under different surrounding rock types, different lining thickness and different working conditions.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV554

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