【摘要】：隨著廣州市公路交通事業(yè)的迅猛發(fā)展，公路交通量不斷增加，很多橋梁交通量已遠(yuǎn)遠(yuǎn)超過了設(shè)計通行能力。由于歷史和資金的原因，市內(nèi)大部分20世紀(jì)后期修建的橋梁仍在營運使用，但其橋面寬度已無法滿足現(xiàn)代交通的通行要求，成為制約公路運輸事業(yè)發(fā)展的瓶頸。尤其對于廣州周邊郊區(qū)，這種情況更為顯著。對這些舊橋如要全部推倒重建，則既不科學(xué)，更不現(xiàn)實。對于那些健康情況良好，遠(yuǎn)沒有達(dá)到使用壽命的舊橋，采用拓寬改建的辦法，提高其通行能力，實則為較好辦法。 舊橋拓寬可以利用舊橋單側(cè)或雙側(cè)建新橋的辦法，這種方法具有工期短，節(jié)省費用，并且不會中斷交通的特點。當(dāng)前，由于舊橋拓寬改建的過程中常存在原始資料和圖紙不全的客觀原因，舊橋拓寬改建設(shè)計的制約因素和技術(shù)風(fēng)險遠(yuǎn)比設(shè)計新橋要大得多。加強對舊橋拓寬改建的新材料、新方法、新技術(shù)的研究，總結(jié)區(qū)內(nèi)舊橋拓寬改建的各種經(jīng)驗，如能為今后舊橋拓寬改建提供一些借鑒，則達(dá)到了本論文的研究目的。 該論文主要結(jié)合位于廣州南沙區(qū)省道S111線一涌中橋、二涌中橋兩座橋拓寬改建的實例，重點對新舊橋梁橋面縱向連接的處理方法和相關(guān)新材料進(jìn)行研究。通過研究，解決如下問題：1）通過實測一座8米跨徑的新舊空心板橋縱向連接處的跨中撓度差，進(jìn)行橋面鋪裝層抗彎、抗剪分析與計算，確定橋面連續(xù)鋪裝方案，，經(jīng)過實施4年后的觀察，效果良好；2）提出同類橋型橋面連續(xù)鋪裝的處理方法；3）提出新舊橋縱向、橫向連接處1m范圍采用高強韌性混凝土連續(xù)鋪裝，其余采用普通混凝土鋪裝的新型混凝土材料的處理方法；4）提出高強韌性混凝土：水性環(huán)氧樹脂或丁苯橡膠增強鋼纖維混凝土、高強灌注混凝土等新材料特性。
[Abstract]:With the rapid development of highway traffic in Guangzhou, the traffic volume of highway is increasing, and the traffic volume of many bridges has far exceeded the capacity of design. Because of the history and capital, most of the bridges built in the late 20th century in the city are still in operation, but the width of the bridge deck can no longer meet the requirements of modern traffic, which has become the bottleneck restricting the development of highway transportation. Especially for the suburbs around Guangzhou, this situation is more significant. It is neither scientific nor realistic to demolish and rebuild all these old bridges. For those old bridges which are in good health and far from reaching their service life, it is a better way to use the method of widening and rebuilding to improve their capacity. The method of building new bridge on one or both sides of old bridge can be used in widening old bridge. This method has the characteristics of short time limit, saving cost and not interrupting traffic. At present, due to the objective reasons of incomplete original data and drawings in the process of widening and rebuilding old bridges, the restrictive factors and technical risks of widening and rebuilding old bridges are far greater than that of designing new bridges. Strengthening the research on new materials, new methods and new technologies of widening and rebuilding old bridges, summarizing various experiences of widening and rebuilding old bridges in the area, if it can provide some reference for widening and rebuilding of old bridges in the future, then the purpose of this paper is achieved. This paper mainly combines with the examples of widening and rebuilding of the first surge bridge and the second Chung middle bridge along the S111 line of the provincial road in Nansha District of Guangzhou. The emphasis is on the treatment method and the related new materials of the longitudinal connection of the bridge deck between the new and the old bridges. Through the research, the following problem is solved: (1) by measuring the deflection difference in the longitudinal joint of a new and old hollow slab bridge with 8 meters span, the bending resistance, shear resistance analysis and calculation of the deck pavement layer are carried out, and the continuous paving scheme of the bridge deck is determined. After 4 years' observation, the effect is good (2) the treatment method of continuous pavement of similar bridge deck is put forward. (3) the longitudinal and horizontal connection of new and old bridges is proposed, and the continuous paving of high strength and ductile concrete is adopted in the area of 1 m in transverse connection. In addition, the treatment method of new concrete materials with ordinary concrete pavement is presented. The new properties of high strength and toughness concrete, such as waterborne epoxy resin or styrene-butadiene rubber reinforced steel fiber reinforced concrete, high strength cast-in-place concrete and so on, are put forward.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U445.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 程世琪;聚合物鋼纖維混凝土的研究[J];安徽建筑;2002年03期

2 黃姝,劉守良;對舊橋加寬的幾點看法[J];東北公路;1997年04期

3 王學(xué)軍;基礎(chǔ)沉降對加寬橋梁上部構(gòu)造的影響分析[J];河北工業(yè)大學(xué)成人教育學(xué)院學(xué)報;2002年02期

4 周寶標(biāo),彭可清;謝邊立交主線擴建新舊橋縱向連接施工[J];廣東公路交通;2003年02期

5 王聰慧;植筋技術(shù)在橋梁加寬及橋面加強工程中的應(yīng)用[J];公路;2002年09期

6 馬春生,宋神友;廣佛高速公路湖洲大橋主橋新舊結(jié)構(gòu)連接設(shè)計[J];公路;2003年S1期

7 焦楚杰,孫偉,高培正,周云;鋼纖維混凝土力學(xué)性能試驗研究[J];廣州大學(xué)學(xué)報(自然科學(xué)版);2005年04期

8 李世緯;徐邦凱;;滬寧高速公路錫澄運河大橋路段擴建工程方案研究[J];中外公路;2005年06期

9 朱偉超;;舊橋拓寬改建修復(fù)工程[J];河南建材;2011年04期

10 王培銘,許綺,J.Stark;橋面用丁苯乳液改性水泥砂漿的力學(xué)性能[J];建筑材料學(xué)報;2001年01期

本文編號：2197764