萬(wàn)州大橋典型病害分析及處治方法研究
發(fā)布時(shí)間：2019-03-14 10:11
【摘要】：鋼管混凝土連續(xù)剛構(gòu)橋由于其具有承載能力高、抗震性能好、施工方便、綜合經(jīng)濟(jì)效益好等優(yōu)點(diǎn)得到橋梁工程師們的青睞。在國(guó)內(nèi),首先在萬(wàn)州道河溝大橋上成功應(yīng)用,隨后在萬(wàn)州大橋以及向家壩大橋上推廣。而國(guó)外主要研究方鋼管砼、圓鋼管砼、矩形鋼管砼和薄壁鋼管砼結(jié)構(gòu),以及核心砼為素砼或在核心砼中配置鋼筋或型鋼。鋼管混凝土連續(xù)剛構(gòu)橋的應(yīng)用尚未成熟,在理論上和工程技術(shù)上仍不夠完善,已建成橋梁中存在一定的病害,如非線(xiàn)性溫度分布使高墩產(chǎn)生偏位及側(cè)向穩(wěn)定問(wèn)題;過(guò)大的溫差導(dǎo)致鋼管和砼脫空等問(wèn)題。本文以萬(wàn)州大橋?yàn)楣こ桃劳?結(jié)合萬(wàn)州大橋的實(shí)際情況,闡述了鋼管砼連續(xù)剛構(gòu)橋的病害、原因及維修處治措施,為同類(lèi)橋梁的設(shè)計(jì)施工提供具有現(xiàn)實(shí)價(jià)值的參考,主要研究?jī)?nèi)容包括以下幾個(gè)方面:1)針對(duì)萬(wàn)州大橋的運(yùn)營(yíng)情況,總結(jié)目前存在的病害:4#、9#墩上、下支座完全失去支座滑移功能;4#、9#端橫梁頂部砼嚴(yán)重碎裂,鋼筋外露,有橫向貫通裂縫及斜向裂縫;5#~8#墩與主桁架下平聯(lián)桿件連接處砼局部壓碎;7#墩側(cè)向傾斜,橫系梁處有斜向裂縫;11#墩與12#臺(tái)之間橋面板鉸縫處砼脫;10#墩基礎(chǔ)外露。2)分析萬(wàn)州大橋的病害產(chǎn)生的原因:端橫梁位于剛構(gòu)邊跨端部,由于支座不能復(fù)位,端橫梁和橋墩承受巨大的外力,橋墩變形到一定限度后,外力全部作用在橫梁鋼管和砼上。橫梁處砼厚度較小,配置鋼筋數(shù)量有限,不能承受巨大的變形力,導(dǎo)致橫梁出現(xiàn)大量裂縫和砼破損脫落;5#~8#主桁架下平聯(lián)桿件連接處由于鋼構(gòu)件和砼構(gòu)件變形的不一致引起砼被壓碎;7#墩由所處的地質(zhì)環(huán)境條件及受人工填土的側(cè)向壓力和在水管斷裂后漏水導(dǎo)致地下水位上升所增加的水壓力等綜合作用下,墩身側(cè)向傾斜,系梁開(kāi)裂。3)針對(duì)萬(wàn)州大橋的病害提出加固方法:對(duì)端橫梁采取鋼板/砼組合結(jié)構(gòu)增大截面的方法進(jìn)行加固,更換全部支座;采用樁+鋼筋砼護(hù)筒對(duì)7#墩進(jìn)行保護(hù),各個(gè)樁之間設(shè)置橫系梁,并與橋墩分離;5#~8#墩與主桁架下平聯(lián)桿件連接處壓碎的砼采用粘貼鋼板加固;修補(bǔ)11#墩與12#臺(tái)之間鉸縫處脫落的砼;修復(fù)10#墩處斷裂的污水管道。4)文末總結(jié)了萬(wàn)州大橋的典型病害及其他病害的加固設(shè)計(jì),對(duì)鋼管混凝土連續(xù)剛構(gòu)橋?qū)?lái)設(shè)計(jì)施工的優(yōu)化提供了較好的指導(dǎo)意義和參考價(jià)值。
[Abstract]:Concrete-filled steel tube continuous rigid frame bridge has been favored by bridge engineers because of its high bearing capacity, good seismic performance, convenient construction and good comprehensive economic benefit. In China, it has been successfully applied in Wanzhou Dahegou Bridge, and then in Wanzhou Bridge and Xiangjiaba Bridge. In foreign countries, concrete filled steel tubes (CFST), concrete filled steel tubes (CFST) and thin wall concrete filled steel tubes (CFST) are mainly studied, and the core concrete is made of plain concrete or reinforced steel or section steel. The application of concrete-filled steel tube (CFST) continuous rigid frame bridge is not mature, and it is not perfect in theory and engineering technology. There are some defects in the built bridge, such as the deflection and lateral stability of high pier caused by nonlinear temperature distribution. Excessive temperature difference causes problems such as steel tubes and concrete emptying. Based on the project of Wanzhou Bridge and the actual situation of Wanzhou Bridge, this paper expounds the disease, causes and maintenance measures of CFST continuous rigid frame bridge, which provides practical reference for the design and construction of similar bridges. The main research contents include the following aspects: 1) in view of the operation of Wanzhou Bridge, summarize the existing diseases: 4, 9 # pier, the lower support completely lost the support slip function; 4), the top concrete of the 9 # end beam is seriously cracked, the steel bar is exposed, and there are transverse through cracks and oblique cracks; the 5 # pier and the lower horizontal connecting member of the main truss are partially crushed by the concrete; the 7 # pier is inclined sideways, and there are oblique cracks in the transverse beam, and the concrete is broken in the section between the 5 # pier and the horizontal connecting member of the main truss. Between 11 # pier and 12 # abutment, the concrete is removed from the joint between the bridge deck and the 12 # abutment. 1 0 # pier foundation exposed. 2) analyze the causes of the disease of Wanzhou Bridge: the end beam is located at the end of the rigid frame, because the support can not be reset, the end beam and pier bear a great external force, and after the pier deforms to a certain extent, The external force all acts on the beam steel tube and concrete. Because of the small thickness of concrete and the limited number of steel bars, it can not bear the huge deformation force, which leads to a large number of cracks and concrete breakage and shedding. The concrete is crushed because of the inconsistency between the deformation of the steel member and the concrete member at the joint of the lower horizontal connecting member of the 5 # main truss; Under the combined action of the geological environment, the lateral pressure of artificial fill and the increase of water pressure caused by water leakage after the water pipe break, the pier body is tilted sideways, which is caused by the geological environment and the lateral pressure of artificial fill and the increase of water pressure caused by water leakage after the break of water pipe. 3) according to the disease of Wanzhou Bridge, the reinforcement method is put forward: the end beam is strengthened by steel plate / concrete composite structure to enlarge the section, and all the supports are replaced; 3) according to the disease of Wanzhou Bridge, the reinforcement method is put forward. The 7 # pier is protected by pile reinforced concrete tube, and the transverse beam is set up between the piles and separated from the bridge pier, and the crushed concrete at the connection between the 5 # pier and the horizontal connecting member under the main truss is strengthened by pasted steel plate. Repairing the shedding concrete at the joint between the 11 # pier and the 12 # platform; 4) the reinforcement design of typical diseases and other diseases of Wanzhou Bridge is summarized at the end of the paper, which provides a good guidance and reference value for the optimization of the design and construction of CFST continuous rigid frame bridge in the future.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U445.71
本文編號(hào)：2439888
[Abstract]:Concrete-filled steel tube continuous rigid frame bridge has been favored by bridge engineers because of its high bearing capacity, good seismic performance, convenient construction and good comprehensive economic benefit. In China, it has been successfully applied in Wanzhou Dahegou Bridge, and then in Wanzhou Bridge and Xiangjiaba Bridge. In foreign countries, concrete filled steel tubes (CFST), concrete filled steel tubes (CFST) and thin wall concrete filled steel tubes (CFST) are mainly studied, and the core concrete is made of plain concrete or reinforced steel or section steel. The application of concrete-filled steel tube (CFST) continuous rigid frame bridge is not mature, and it is not perfect in theory and engineering technology. There are some defects in the built bridge, such as the deflection and lateral stability of high pier caused by nonlinear temperature distribution. Excessive temperature difference causes problems such as steel tubes and concrete emptying. Based on the project of Wanzhou Bridge and the actual situation of Wanzhou Bridge, this paper expounds the disease, causes and maintenance measures of CFST continuous rigid frame bridge, which provides practical reference for the design and construction of similar bridges. The main research contents include the following aspects: 1) in view of the operation of Wanzhou Bridge, summarize the existing diseases: 4, 9 # pier, the lower support completely lost the support slip function; 4), the top concrete of the 9 # end beam is seriously cracked, the steel bar is exposed, and there are transverse through cracks and oblique cracks; the 5 # pier and the lower horizontal connecting member of the main truss are partially crushed by the concrete; the 7 # pier is inclined sideways, and there are oblique cracks in the transverse beam, and the concrete is broken in the section between the 5 # pier and the horizontal connecting member of the main truss. Between 11 # pier and 12 # abutment, the concrete is removed from the joint between the bridge deck and the 12 # abutment. 1 0 # pier foundation exposed. 2) analyze the causes of the disease of Wanzhou Bridge: the end beam is located at the end of the rigid frame, because the support can not be reset, the end beam and pier bear a great external force, and after the pier deforms to a certain extent, The external force all acts on the beam steel tube and concrete. Because of the small thickness of concrete and the limited number of steel bars, it can not bear the huge deformation force, which leads to a large number of cracks and concrete breakage and shedding. The concrete is crushed because of the inconsistency between the deformation of the steel member and the concrete member at the joint of the lower horizontal connecting member of the 5 # main truss; Under the combined action of the geological environment, the lateral pressure of artificial fill and the increase of water pressure caused by water leakage after the water pipe break, the pier body is tilted sideways, which is caused by the geological environment and the lateral pressure of artificial fill and the increase of water pressure caused by water leakage after the break of water pipe. 3) according to the disease of Wanzhou Bridge, the reinforcement method is put forward: the end beam is strengthened by steel plate / concrete composite structure to enlarge the section, and all the supports are replaced; 3) according to the disease of Wanzhou Bridge, the reinforcement method is put forward. The 7 # pier is protected by pile reinforced concrete tube, and the transverse beam is set up between the piles and separated from the bridge pier, and the crushed concrete at the connection between the 5 # pier and the horizontal connecting member under the main truss is strengthened by pasted steel plate. Repairing the shedding concrete at the joint between the 11 # pier and the 12 # platform; 4) the reinforcement design of typical diseases and other diseases of Wanzhou Bridge is summarized at the end of the paper, which provides a good guidance and reference value for the optimization of the design and construction of CFST continuous rigid frame bridge in the future.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U445.71
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 蔡紹懷;我國(guó)鋼管混凝土結(jié)構(gòu)技術(shù)的最新進(jìn)展[J];土木工程學(xué)報(bào);1999年04期
，本文編號(hào)：2439888
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