【摘要】：平原水庫(kù)作為北方地區(qū)主要的蓄水工程,堤壩大多是通過(guò)就地取材或就近取材修建而成的土石壩,具有圍壩長(zhǎng)、壩基透水性強(qiáng)、壩高低、圍堤兩側(cè)水位差大等特點(diǎn),普遍存在滲漏破壞問(wèn)題,對(duì)堤壩的安全穩(wěn)定構(gòu)成嚴(yán)重威脅。 壩基防滲是平原水庫(kù)堤壩防滲的重點(diǎn),有水平防滲和垂直防滲兩種類型。垂直防滲是通過(guò)建立封閉的垂直防滲墻或者防滲帷幕,截?cái)酀B水通道,在一定程度上能根治滲透破壞的防滲措施,防滲效果好,在技術(shù)條件允許且經(jīng)濟(jì)合理的情況下應(yīng)該是首選的防滲措施。而防滲墻對(duì)各種地層適應(yīng)性強(qiáng),造價(jià)較低,所以防滲墻是目前應(yīng)用最廣泛、發(fā)展最快的垂直防滲處理措施之一。由于塑性混凝土具有比剛性混凝土更為優(yōu)良的協(xié)調(diào)特性和經(jīng)濟(jì)性,在工程實(shí)踐中得到廣泛應(yīng)用。 平原水庫(kù)多采用壩前或壩頂防滲墻對(duì)堤壩進(jìn)行防滲控制,但對(duì)于堤壩工后防滲控制,壩前防滲墻易污染水源,影響工程正常運(yùn)行；壩頂防滲墻則工程量大,工期長(zhǎng),投資大。鑒于壩前及壩頂防滲墻存在的局限性,本文提出了平原水庫(kù)堤壩壩后防滲墻措施。 本文在查閱國(guó)內(nèi)外相關(guān)文獻(xiàn)的基礎(chǔ)上,對(duì)平原水庫(kù)堤壩的滲流破壞形式、滲流理論和滲流分析方法進(jìn)行總結(jié)。以濟(jì)南玉清湖水庫(kù)堤壩防滲加固處理為例,選取8+430典型斷面進(jìn)行滲流試驗(yàn)研究,獲取滲流分析參數(shù)和物理模型,并建立典型斷面的二維有限元模型。應(yīng)用有限元法進(jìn)行了不同工況下的堤壩滲流計(jì)算、應(yīng)力應(yīng)變分析和邊坡穩(wěn)定分析,研究塑性混凝土防滲墻在堤壩不同位置時(shí)的防滲控制效果。
[Abstract]:As the main water storage project in the northern region, the plain reservoir is mostly earth-rock dam constructed by using local materials or the nearest material. It is characterized by the length of the surrounding dam, the strong permeability of the dam foundation, the height of the dam, the great water level difference between the two sides of the embankment, and so on. Seepage damage is a common problem, which poses a serious threat to the safety and stability of dikes. Seepage control of dam foundation is the key point of dam seepage control in plain reservoir, and there are two types of horizontal seepage control and vertical seepage control. Vertical seepage control is a kind of anti-seepage measure that can cure seepage damage to a certain extent by establishing closed vertical impermeable wall or impervious curtain and cutting off the seepage passage, and the seepage prevention effect is good. It should be the preferred anti-seepage measure when the technical conditions permit and the economy is reasonable. The impervious wall is one of the most widely used and fastest developing vertical impervious treatment measures because of its strong adaptability to various strata and low cost. Plastic concrete is widely used in engineering practice because of its better coordination property and economy than rigid concrete. In plain reservoir, the impervious wall in front of the dam or at the top of the dam is mostly used to control the seepage of the dam, but for the seepage control after the construction of the dam, the impervious wall in front of the dam is liable to pollute the water source, which affects the normal operation of the project, while the impervious wall at the top of the dam has a large amount of work, a long construction period and a large investment. In view of the limitation of the impervious wall in front of the dam and at the top of the dam, this paper puts forward the measures of the impermeable wall behind the dike and dam of plain reservoir. On the basis of consulting relevant documents at home and abroad, this paper summarizes the seepage failure form, seepage theory and seepage analysis method of plain reservoir dike. Taking the seepage prevention and reinforcement treatment of the dam of Yuqinghu Reservoir in Jinan as an example, 8 430 typical sections are selected for seepage experimental study, the seepage analysis parameters and physical models are obtained, and the two-dimensional finite element model of typical sections is established. The seepage calculation, stress strain analysis and slope stability analysis of embankment under different working conditions are carried out by using finite element method. The seepage control effect of plastic concrete impervious wall in different positions of embankment is studied.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV223.4

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