【摘要】：隨著我國(guó)水利工程事業(yè)的發(fā)展,在全國(guó)各地修建了大量的堆石壩,由于堆石壩塊石大面積出露,使得壩體、壩坡與生態(tài)環(huán)境之間不和諧。目前雖然對(duì)于壩坡綠化生態(tài)修復(fù)雖然做了大量工作,但是工程上缺乏一種實(shí)質(zhì)有效的壩坡綠化生態(tài)修復(fù)方法;因此本文提出一種管道栽培綠化裝置布置在堆石壩下游壩坡實(shí)現(xiàn)綠化生態(tài)修復(fù),利用ABAQUS仿真軟件對(duì)布置栽培管道前后壩體應(yīng)力應(yīng)變進(jìn)行分析�，F(xiàn)有研究和實(shí)際工程表明堆石體各部位的應(yīng)力應(yīng)變受材料分區(qū)影響,深入研究壩體不同材料的分區(qū),對(duì)于提高土石壩的安全性、經(jīng)濟(jì)性等具有重要的意義。本文結(jié)合丫多河面板堆石壩進(jìn)行有限元仿真計(jì)算,分析壩體在不同材料分區(qū)情況下堆石壩的應(yīng)力應(yīng)變情況。本文的研究和結(jié)果如下:1、將管道栽培裝置布置在某均質(zhì)堆石壩下游壩坡,采用ABAQUS軟件結(jié)合DuncanE-B模型計(jì)算壩體蓄水后在不同荷載、不同管道間距的應(yīng)力應(yīng)變。計(jì)算結(jié)果表明壩體應(yīng)力最大增量最大為2KPa,壩體位移最大增量最大為0.05cm。對(duì)壩體的應(yīng)力應(yīng)變影響很小,對(duì)于壩體而言可以忽略不計(jì)。說(shuō)明該技術(shù)方案是合理的、可行的,該技術(shù)方案可以應(yīng)用到實(shí)際工程中去。2、建立丫多河水庫(kù)面板堆石壩三維模型,分析壩體在竣工期、蓄水期的應(yīng)力應(yīng)變。結(jié)果表明壩體應(yīng)力應(yīng)變?cè)茍D能夠較好反映壩體的變形規(guī)律,模擬結(jié)果與實(shí)際工程經(jīng)驗(yàn)相符合。將壩體按照不同主次堆石分界線坡度進(jìn)行材料分區(qū),結(jié)果表明隨著次堆石區(qū)域的擴(kuò)大,對(duì)壩體的水平位移、面板壓應(yīng)力、下游壩坡安全系數(shù)影響較小。壩體水平位移最大增大9cm,面板壓應(yīng)力最大變化為0.4MPa,安全系數(shù)最大減小0.25;隨著次堆石區(qū)域的擴(kuò)大,對(duì)壩體沉降、主應(yīng)力、面板拉應(yīng)力、面板撓度影響較大。壩體最大沉降增大24.92cm、壩體主應(yīng)力最大增大0.157MPa、面板拉應(yīng)力最大增大0.9MPa、面板撓度最大增大6.13cm。3、模擬了不同墊層厚度對(duì)堆石壩的影響,結(jié)果表明隨著墊層增厚,對(duì)面板拉應(yīng)力影響較大,拉應(yīng)力最大增量為0.4MPa;對(duì)面板壓應(yīng)力、撓度影響較小,壓應(yīng)力最大變化值為0.2MPa,撓度最大增大2cm;墊層厚度變化對(duì)壩體沒有影響,壩體沉降和壩體應(yīng)力幾乎沒有變化。
[Abstract]:With the development of water conservancy engineering in China, a large number of rockfill dams have been built all over the country. Due to the large area of rockfill dams, the dam body, dam slope and ecological environment are not harmonious. Although a great deal of work has been done on the greening ecological restoration of dam slope at present, there is a lack of an effective ecological restoration method for the greening of dam slope in engineering. In this paper, a kind of pipeline planting and greening device is put forward to realize the greening ecological restoration on the dam slope downstream of rockfill dam. The stress and strain of the dam body before and after the arrangement of the cultivation pipeline are analyzed by using ABAQUS simulation software. The existing research and practical engineering show that the stress and strain of various parts of rockfill body are affected by material zoning. It is of great significance to study the zoning of different materials of dam body for improving the safety and economy of earth-rock dam. In this paper, the finite element simulation of Yaduo River rockfill dam is carried out, and the stress and strain of rockfill dam under different material zoning are analyzed. The research and results of this paper are as follows: 1. The pipeline cultivation device is arranged on the downstream dam slope of a homogeneous rockfill dam. The stress and strain of the dam under different loads and different pipeline spacing are calculated by ABAQUS software combined with DuncanE-B model. The results show that the maximum increment of stress is 2 KPA and the maximum increment of displacement is 0. 05 cm. The influence of stress and strain on dam body is very small and can be ignored. It is shown that the technical scheme is reasonable and feasible. It can be applied to practical engineering. The 3D model of Yaduohe reservoir face rockfill dam is established, and the stress and strain of the dam body in the period of completion and storage are analyzed. The results show that the stress-strain cloud map of the dam body can reflect the deformation law of the dam body, and the simulation results are in agreement with the actual engineering experience. According to the slope of different primary and secondary rockfill boundary, the results show that with the expansion of secondary rockfill area, the horizontal displacement of dam body, the compressive stress of face slab and the safety factor of downstream dam slope are less affected. The maximum horizontal displacement of the dam is increased by 9 cm, the maximum compressive stress of the face slab is 0.4 MPA, and the maximum safety factor is reduced by 0.25. With the expansion of the secondary rockfill area, the dam settlement, the principal stress, the tensile stress of the face slab and the deflection of the slab are greatly affected. The maximum settlement of the dam is increased by 24.92 cm, the main stress of the dam is increased by 0.157 MPa, the tensile stress of the face slab is increased by 0.9 MPA, and the maximum deflection of the face slab is increased by 6.13 cm 路3. The effects of different cushion thickness on the rockfill dam are simulated. The results show that with the thickness of the cushion, the tensile stress of the face slab is greatly affected. The maximum increment of tensile stress is 0.4MPa, the maximum variation of compressive stress is 0.2MPa, the maximum deflection is 2cm, the thickness of cushion has no effect on dam body, and the settlement and stress of dam body have no change.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TV641.43

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