本文選題：路基 + 煤矸石��； 參考：《河北工程大學(xué)》2014年碩士論文

【摘要】：煤矸石是我國各種工業(yè)生產(chǎn)廢料中排放量最大、占地最多、污染環(huán)境較為嚴(yán)重的一種固體丟棄物質(zhì)，嚴(yán)重影響到人們的日常生活、工作質(zhì)量和身心健康。在煤矸石綜合利用的途徑中，如果將煤矸石用作公路工程中的路基填料，，將能夠大量減少筑路征地費(fèi)用，并改善當(dāng)?shù)丨h(huán)境質(zhì)量，具有明顯的技術(shù)、經(jīng)濟(jì)和生態(tài)效益。采用煤矸石填料填筑路基目前最主要問題是保障其穩(wěn)定性，而其穩(wěn)定性取決于路基的最終沉降量是否在規(guī)范要求的范圍內(nèi)。因此，煤矸石填料路基的最終沉降量的預(yù)測分析成為亟需解決的問題。 本文分析了煤矸石的分類組成及工程性質(zhì)顯示：天然煤矸石雖存在明顯的顆粒級(jí)配缺陷，但壓密過程會(huì)促使破碎的粗大顆粒重新排列，減小煤矸石填料的孔隙比，最終使其結(jié)構(gòu)更加緊密、路基更加穩(wěn)定；煤矸石中的氧化物如鈣、鎂、鋁、硅等及少量的堿料會(huì)與石灰發(fā)生一系列水化反應(yīng)產(chǎn)生較高的強(qiáng)度，有效的減小路基的沉降量。本文利用某工程項(xiàng)目數(shù)據(jù)，選用摩爾—庫侖模型，對不同填筑厚度的煤矸石路基分別采用FLAC軟件進(jìn)行沉降數(shù)值模擬并分析對路基施工期沉降的影響。模擬表明：隨著填筑高度的增加，路基的豎向沉降量逐漸增加，各項(xiàng)應(yīng)力變化不大；當(dāng)路基高度大于10m時(shí)，最大沉降量會(huì)高達(dá)20cm以上，在煤矸石路基的設(shè)計(jì)、施工及養(yǎng)護(hù)時(shí)應(yīng)該注意到，為煤矸石路基預(yù)留沉降量提供理論參考。與填土土料路基相對比，煤矸石填筑路基不僅能夠降低工程造價(jià)，而且保護(hù)環(huán)境。最后研究煤矸石路基施工技術(shù)，分析了煤矸石路基的技術(shù)、經(jīng)濟(jì)和生態(tài)效益。
[Abstract]:Coal gangue is a kind of solid discarded substance which has the largest amount of emissions and occupies the most land and pollutes the environment seriously among all kinds of industrial waste in our country, which seriously affects people's daily life, working quality and physical and mental health. In the way of comprehensive utilization of coal gangue, if coal gangue is used as subgrade filler in highway engineering, it can greatly reduce the cost of road construction, improve the local environmental quality, and have obvious technical, economic and ecological benefits. At present, the main problem of using coal gangue filler to fill subgrade is to ensure its stability, and its stability depends on whether the final settlement of subgrade is within the range of specification. Therefore, the prediction and analysis of the final settlement of roadbed filled with coal gangue has become an urgent problem. The classification composition and engineering properties of coal gangue are analyzed in this paper. Although there are obvious particle gradation defects in natural coal gangue, the compaction process will cause the broken coarse particles to rearrange and reduce the void ratio of coal gangue filler. Finally, the structure of coal gangue is more compact and the roadbed is more stable, and the oxides such as calcium, magnesium, aluminum, silicon and a small amount of alkali in coal gangue will have a series of hydration reactions with lime to produce higher strength and reduce the settlement of roadbed effectively. In this paper, using the data of a certain project, the Mohr-Coulomb model is used to simulate the settlement of coal gangue roadbed with different thickness by FLAC software, and the influence on the settlement of roadbed during the construction period is analyzed. The simulation results show that the vertical settlement of subgrade increases gradually with the increase of filling height, and the stress changes little. When the height of roadbed is more than 10m, the maximum settlement will be higher than 20cm. During construction and maintenance, attention should be paid to the theoretical reference for the reserved settlement of coal gangue subgrade. Compared with the subgrade filled with soil material, coal gangue can not only reduce the engineering cost, but also protect the environment. Finally, the construction technology of coal gangue roadbed is studied, and the technical, economic and ecological benefits of coal gangue roadbed are analyzed.
【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)】：U416.1

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本文編號(hào)：1933994