本文關(guān)鍵詞： 改擴(kuò)建 擬合設(shè)計(jì) 線形設(shè)計(jì) 豎曲線　出處：《河北工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：改革開放以來,我國的公路交通行業(yè)持續(xù)快速地發(fā)展,車輛持有率隨之增加,部分公路難以適應(yīng)不斷增長的交通量需要,道路擁堵現(xiàn)象日趨嚴(yán)重,我國的公路建設(shè)必然朝著改擴(kuò)建的方向發(fā)展。相對(duì)于新建公路的縱斷面線形設(shè)計(jì)來說,公路改擴(kuò)建縱斷面線形設(shè)計(jì)更為復(fù)雜,涉及的問題較多。所以,研究改擴(kuò)建公路設(shè)計(jì)中的縱斷面線形設(shè)計(jì)具有十分重要的意義�；谏鲜霰尘扒疤�,通過整理研究國內(nèi)外有關(guān)公路改擴(kuò)建工程的資料,確定了研究的要點(diǎn)。首先,本文對(duì)改擴(kuò)建公路縱斷面設(shè)計(jì)的內(nèi)容及步驟進(jìn)行了大體上的概括與總結(jié),并列出了縱斷面設(shè)計(jì)中的制約因素,以及在設(shè)計(jì)中如何考慮這些制約因素。其次,本文通過對(duì)國內(nèi)外對(duì)曲線擬合方法的比較,結(jié)合我國的實(shí)際情況,提出了一種擬合縱斷面的模型。該模型利用最小二乘法的原理,通過擬合出縱坡來獲得縱坡參數(shù),并通過計(jì)算得出豎曲線的參數(shù)。通過對(duì)縱坡的擬合設(shè)計(jì)實(shí)例,證明了利用最小二乘法擬合出的縱坡要優(yōu)于目前所使用的改擴(kuò)建縱斷面縱坡的設(shè)計(jì)方法。最后總結(jié)了在縱斷面設(shè)計(jì)中可能用到的幾種不對(duì)稱豎曲線形式,包括傳統(tǒng)的不對(duì)稱豎曲線、弧長相等的不對(duì)稱豎曲線以及新型單一的不對(duì)稱豎曲線(即三次拋物線豎曲線)。根據(jù)傳統(tǒng)不對(duì)稱豎曲線及弧長相等的不對(duì)稱豎曲線的幾何性質(zhì)推導(dǎo)出其曲線方程(縱斷面高程計(jì)算公式),并根據(jù)行車緩和沖擊及視距計(jì)算出了這三種不對(duì)稱豎曲線的最小長度值。通過這三種不對(duì)稱豎曲線在三個(gè)工程實(shí)例中的應(yīng)用情況,分析了這幾種豎曲線在公路改擴(kuò)建中的適用情況。在凸型豎曲線中,當(dāng)需要減小的挖方量相對(duì)較多而對(duì)線形要求不太高時(shí),可以采用傳統(tǒng)的不對(duì)稱豎曲線,弧長相等的不對(duì)稱豎曲線線形比傳統(tǒng)的不對(duì)稱豎曲線較優(yōu),但縱面高程比之較高,可用于需要增加路面高度的路段。三次拋物豎曲線可用于需要降低填方的凹型曲線中,既能減小路面填方,又能提供很好的線形�？偠灾�,本文對(duì)改擴(kuò)建公路縱斷面線形設(shè)計(jì)的研究提出了一定的思路和方法,有助于縱斷面線形設(shè)計(jì)的標(biāo)準(zhǔn)化實(shí)現(xiàn)。
[Abstract]:Since the reform and opening up, the highway traffic industry of our country continues to develop rapidly, with the increase of vehicle holding rate, some highways are difficult to adapt to the increasing demand of traffic volume, the phenomenon of road congestion is becoming more and more serious. The highway construction of our country is bound to develop towards the direction of reconstruction and extension. Compared with the design of the profile of the new highway, the design of the longitudinal section of the highway reconstruction and extension is more complex and involves many problems. It is of great significance to study the profile design of highway reconstruction and extension. Based on the above background, the data of highway reconstruction and extension project at home and abroad are analyzed and studied. The main points of the study have been determined. Firstly, the content and steps of the design of the reconstruction and extension highway vertical section are summarized and summarized, and the restricted factors in the design of the longitudinal section are listed. And how to consider these constraints in the design. Secondly, through the comparison of curve fitting methods at home and abroad, combined with the actual situation in China. In this paper, a model of pseudo-longitudinal section is put forward. By using the principle of least square method, the parameters of longitudinal slope are obtained by fitting the longitudinal slope, and the parameters of vertical curve are obtained by calculating the parameters of vertical curve. It is proved that the method of fitting longitudinal slope by least square method is better than that used at present. Finally, several kinds of asymmetrical vertical curve forms that may be used in vertical section design are summarized. Including traditional asymmetric vertical curves. Asymmetric Vertical Curve with equal Arc length and New Type of single asymmetric Vertical Curve (i.e. cubic Parabola Vertical Curve). According to the geometric properties of the traditional asymmetric vertical curve and the asymmetric vertical curve with equal arc length, the equation of the curve (vertical section height calculation formula) is derived. The minimum length of the three asymmetrical vertical curves is calculated according to the impact mitigation and the visual distance. The application of these three asymmetrical vertical curves in three engineering examples is also given. The application of these vertical curves in highway reconstruction and extension is analyzed. In convex vertical curves, the traditional asymmetric vertical curves can be used when the quantity of excavations needed to be reduced is relatively large and the requirements for alignment are not too high. The line shape of asymmetric vertical curve with equal arc length is better than that of traditional asymmetric vertical curve, but the height ratio of longitudinal plane is higher. The cubic parabolic vertical curve can be used in the concave curve which needs to reduce the filling, which can not only reduce the pavement filling, but also provide good alignment. In this paper, some ideas and methods are put forward for the study of the design of the longitudinal section of the reconstruction and extension highway, which is helpful to the standardization of the design of the profile of the longitudinal section.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U418.8;U412.33

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 袁勝強(qiáng);朱銀樂;;既有高速公路縱斷面線形的擬合技術(shù)[J];城市道橋與防洪;2009年06期

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本文編號(hào)：1488257