【摘要】：路基作為道路的基礎(chǔ)工程,對道路的穩(wěn)定性起著重要作用。在道路擴(kuò)建工程中,時(shí)有因新舊路基間的不均勻沉降而帶來的病害,嚴(yán)重影響行車的舒適性和道路穩(wěn)定性。液態(tài)粉煤灰憑借其質(zhì)量輕、價(jià)格低、施工便利、無需碾壓、壓縮性小、沉降小等優(yōu)點(diǎn),能夠有效地解決路基穩(wěn)定性、不均勻沉降等問題。本文結(jié)合唐津高速擴(kuò)建工程,進(jìn)行了以下分析研究:根據(jù)天津地區(qū)粉煤灰來源及本工程的實(shí)際情況,通過室內(nèi)試驗(yàn)對液態(tài)粉煤灰的材料組成、原材料性能進(jìn)行分析;采用正交試驗(yàn)法設(shè)計(jì)試驗(yàn)方案,確定了滿足施工條件的路基填筑用液態(tài)粉煤灰最佳配合比;系統(tǒng)分析了液態(tài)粉煤灰混合料各原材料用量與流動(dòng)度、收縮性、強(qiáng)度、抗壓回彈模量、水穩(wěn)定性等路用性能之間的關(guān)系;提出了液態(tài)粉煤灰路基填筑施工工藝;通過實(shí)體工程的監(jiān)測數(shù)據(jù)和有限元模擬分析結(jié)果均充分說明液態(tài)粉煤灰路堤具有良好的穩(wěn)定性。本文的研究結(jié)果,對液態(tài)粉煤灰在天津等軟土地區(qū)的路基填筑工程中的推廣應(yīng)用提供了技術(shù)支撐,進(jìn)一步促進(jìn)粉煤灰大量回收利用,減少資源浪費(fèi)。
[Abstract]:As the foundation of the road, the subgrade plays an important role in the stability of the road. In the road expansion project, there are diseases caused by the uneven settlement between the old and the new subgrade, which seriously affects the comfort and road stability of the driving. The liquid fly ash has the advantages of light weight, low price, convenient construction, no need of rolling, small compressibility, small settlement and the like, and can effectively solve the problems of roadbed stability, uneven settlement and the like. According to the source of fly ash in Tianjin area and the actual situation of the project, the material composition and raw material performance of the liquid fly ash are analyzed by indoor test according to the source of fly ash in Tianjin area and the actual situation of the project, and the test scheme is designed by using the orthogonal test method. The optimal mix ratio of the liquid fly ash for the subgrade filling is determined, and the relationship between the dosage and the fluidity, the shrinkage, the strength, the rebound modulus and the water stability of the mixture of the liquid fly ash is systematically analyzed. The construction technology of the liquid fly ash subgrade is put forward, and the results of the monitoring data and the finite element simulation analysis show that the liquid fly ash embankment has good stability. The results of this paper provide the technical support for the application and application of the liquid fly ash in the subgrade filling in the soft soil area such as Tianjin, and further promote the large amount of the fly ash to be recycled and reduce the waste of the resources.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U414;U418.8

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 汪浩,黃曉明;軟土地基上高速公路加寬的有限元分析[J];公路交通科技;2004年08期

2 嚴(yán)捍東;粉煤灰的粉體特性及其對減水效應(yīng)的影響[J];環(huán)境工程;2002年02期

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本文編號：2438389