地震對PC連續(xù)剛構(gòu)橋懸臂新澆筑混凝土影響研究
[Abstract]:With the rapid development of traffic construction, a large number of highways, provincial trunk lines and other rural roads have been built in China. Bridge engineering is an important part of highway engineering. The destruction of buildings after the earthquake will not only bring great losses to people's lives and property, but also interrupt the transportation of materials and materials, and at the same time bring great difficulties to earthquake relief. Affected by the Longmenshan NE-trending tectonic belt and Sichuan-Yunnan north-south trending tectonic belt, Yaan experienced the destruction of the Wenchuan M8.0 earthquake on May 12, 2008 and the Longmen M7.0 earthquake in Lushan County on April 20, 2013. The superstructure of Dadu River Bridge in Hanyuan is a continuous rigid frame cast by hanging basket cantilever, and the span is 133m 255m 133m. The suspended concrete of main beam No. 2 pier 5 segment hanging basket begins at 18:30 on May 11, 2008. It ended at 9 a.m. on May 12. At 14:28 on 12 May, a strong earthquake of magnitude 8.0 occurred in Wenchuan, a large tremor occurred in the hanging basket, and the strength of the concrete that has been poured has not yet reached its expected strength. Seismic vibration will cause concrete damage to a certain extent, which will affect the strength of newly poured concrete and the binding force between it and steel bars. This problem will directly affect the safe operation of the bridge after completion. This paper mainly focuses on the study of seismic vibration on the construction segments of long-span PC continuous rigid frame bridge, and discusses the influence of earthquake on the new cast-in-place bridge segments. The treatment measures taken by the bridge are analyzed, and the test and evaluation of the cast-in-place section after the treatment are carried out, and the post-bridge load test is carried out. The results of test and test show that the influence of earthquake on the segment of PC continuous rigid frame bridge is less than that of concrete before final setting. The concrete with final setting and concrete solidifying strength up to 80% of the designed strength needs to be drilled and cleaned up on the floating slurry and delamination part of its surface, and the new interface should be properly drilled. Brush the interface with cement slurry and follow-up concrete. This construction technology can ensure the integrity of construction segment concrete. After operation, the performance of the bridge is good, and all kinds of test indexes can meet the requirements of the design.
【學(xué)位授予單位】:重慶交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:U442.55;U445.57
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 黨發(fā)寧;雷光宇;丁衛(wèi)華;李騫;;混凝土細(xì)觀結(jié)構(gòu)動態(tài)力學(xué)特性CT試驗研究[J];振動與沖擊;2014年24期
2 盧壽榮;;淺論商品混凝土現(xiàn)澆樓板在施工過程中不當(dāng)所造成裂縫的主要原因和預(yù)防措施[J];中國建筑金屬結(jié)構(gòu);2013年16期
3 李福海;;地震對結(jié)構(gòu)新澆筑混凝土強(qiáng)度、鋼筋握裹力的影響[J];學(xué)術(shù)動態(tài);2012年03期
4 張振國;;砼強(qiáng)度達(dá)不到設(shè)計要求的事故成因分析[J];民營科技;2012年07期
5 孫茂元;;特別策劃:混凝土凝結(jié)時間異常問題 混凝土凝結(jié)時間異常問題分析[J];商品混凝土;2012年01期
6 韓海玲;李固華;魏建東;何廣杰;王科;;地震對新澆混凝土細(xì)觀結(jié)構(gòu)及強(qiáng)度的影響[J];重慶交通大學(xué)學(xué)報(自然科學(xué)版);2010年06期
7 徐明強(qiáng);李固華;魏建東;何廣杰;王科;黎明;張家國;;模擬地震對新澆注混凝土鋼筋握裹強(qiáng)度的影響[J];四川大學(xué)學(xué)報(工程科學(xué)版);2010年S1期
8 劉同賓;陽柳;;新舊混凝土粘結(jié)薄弱界面成因分析[J];江西建材;2009年03期
9 張文富;;混凝土結(jié)合面的受力分析[J];黑龍江科技信息;2007年05期
10 梁亞水;;如何加強(qiáng)新舊混凝土結(jié)合面的粘結(jié)[J];四川建材;2006年03期
相關(guān)碩士學(xué)位論文 前7條
1 李健;云南某混凝土梁橋的耐久性設(shè)計研究[D];重慶交通大學(xué);2013年
2 范小軍;梁橋的動力損傷診斷技術(shù)研究[D];重慶交通大學(xué);2010年
3 章鵬;釋能法加固拱橋內(nèi)力重分配研究[D];重慶交通大學(xué);2009年
4 魯雪冬;再生粗骨料高強(qiáng)混凝土力學(xué)性能研究[D];西南交通大學(xué);2006年
5 曹蓓蓓;混凝土的熱特性與再生利用研究[D];武漢理工大學(xué);2006年
6 展辰輝;混凝土及其組成材料動力特性研究[D];河海大學(xué);2005年
7 袁昆;后澆帶的應(yīng)力分析及在大體積混凝土中的應(yīng)用[D];西安建筑科技大學(xué);2002年
,本文編號:2447503
本文鏈接:http://sikaile.net/kejilunwen/daoluqiaoliang/2447503.html