【摘要】：由于交通量增長(zhǎng)速度迅猛,我國(guó)早期修建的高速公路交通量已近飽和,對(duì)現(xiàn)有公路改擴(kuò)建已成必然。舊路加寬擴(kuò)建成為最直接、有效的解決途徑。而公路工程加寬擴(kuò)建在我國(guó)尚無(wú)成熟的工程經(jīng)驗(yàn),現(xiàn)行規(guī)范對(duì)于公路擴(kuò)建加寬的設(shè)計(jì)和施工也涉及較少。與新建公路工程相比具有施工難度大、工藝復(fù)雜、交通干擾大、質(zhì)量要求高等特點(diǎn)。用新建工程的設(shè)計(jì)方法和施工方法不能解決改擴(kuò)建工程面臨的問(wèn)題。為解決永登至古浪高速公路舊路利用段差異沉降等問(wèn)題,提高永古高速公路通車(chē)運(yùn)營(yíng)后路用性能,亟需對(duì)舊路加寬方案進(jìn)行研究、論證,提出合理的施工工藝和工程措施,確保工程建設(shè)質(zhì)量。論文依托永登至古浪高速公路建設(shè)項(xiàng)目舊路加寬段工程,在廣泛收集、分析國(guó)內(nèi)外舊路加寬資料的基礎(chǔ)上,初步確定永古高速公路舊路加寬方案,結(jié)合室內(nèi)土工試驗(yàn)參數(shù),采用數(shù)值分析和理論公式驗(yàn)算,得出不同加寬方式下路基沉降規(guī)律,對(duì)依托工程沿線過(guò)濕黃土地基舊路利用方案進(jìn)行優(yōu)化,提出適合過(guò)濕黃土地區(qū)舊路加寬的綜合工程處治措施和施工控制要點(diǎn)。為驗(yàn)證舊路加寬設(shè)計(jì)方案的合理性,在舊路加寬路基橫斷面埋設(shè)測(cè)試元件,進(jìn)行工后沉降監(jiān)測(cè)分析。經(jīng)永古高速公路工程實(shí)體工程驗(yàn)證:本文提出的土工格室用于防治舊路加寬路基縱向裂縫的處治方案工程應(yīng)用效果良好,證明技術(shù)上是可行的,可供類(lèi)似工程借鑒。
[Abstract]:Due to the rapid growth of traffic volume, the traffic volume of the expressway built in the early period of our country is nearly saturated, which is inevitable for the reconstruction and expansion of the existing highway. Widening and extending the old road becomes the most direct and effective way to solve the problem. However, there is no mature engineering experience in our country for widening and widening of highway engineering, and the current codes are less involved in the design and construction of road widening. Compared with the new highway engineering, the construction is difficult, the technology is complex, the traffic interference is large, and the quality requirement is high. The design method and construction method of the new project can not solve the problems faced by the reconstruction and extension project. In order to solve the problem of differential settlement of the old section of Yongden-Gulang Expressway, and improve the performance of the Yonggu Expressway after it is opened to traffic, it is necessary to study and demonstrate the widening scheme of the old highway, and put forward reasonable construction technology and engineering measures. Ensure the quality of project construction. Based on the widening section of the old road of Yongden-Gulang Expressway construction project, based on the extensive collection and analysis of the old road widening data at home and abroad, the paper preliminarily determines the widening scheme of the old road of Yongdeng-Gulang Expressway, and combines with the indoor geotechnical test parameters. By means of numerical analysis and theoretical formula checking calculation, the settlement law of roadbed under different widening modes is obtained, and the utilization scheme of old road of overwet loess foundation along relying engineering is optimized. This paper puts forward comprehensive engineering treatment measures and construction control points suitable for widening old roads in overwet loess area. In order to verify the rationality of the widening design of the old road, the test elements are embedded in the cross-section of the widening roadbed of the old road to monitor and analyze the settlement after construction. Verified by the entity engineering of Yonggu Expressway: the geogrid chamber proposed in this paper is used to prevent and cure longitudinal cracks in widening roadbed of old road with good application effect, which proves that it is technically feasible and can be used for reference in similar projects.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：U416.1

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