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    【行业精粹?strong><a href="http://zhayiyang.net/" target="_blank">建筑纠偏公司</a></strong>559针对桥梁墩柱裂缝问题采用何种加固方法?</p> <p>     桥梁墩台基础在常年使用过程中,除了承受上部构造荷载外,还将承受土压力、风力、流水压力、冰压力和浮力等等各种力的作用。另外,自然界各种因素的影响作用,以及由于过桥车辆的日益重型化,墩台基础经常受到过重荷载的作用,因此,桥墩台将会出现不同程度的损坏。这时就需?strong><a href="http://zhayiyang.net/qlsdjg/" target="_blank">建筑纠偏公司</a></strong>对其进行加固处理,在了解如何进行加固之前,我们先全面认识一下桥梁桥墩损坏的现象及原因有哪些?</p> <p style="text-align:center;"> <img src="/uploads/image/20180518/20180518105104_4899.jpg" alt="【行业精粹】建筑纠偏公司针对桥梁墩柱裂缝问题采用何种加固方? width="640" height="416" title="【行业精粹】建筑纠偏公司针对桥梁墩柱裂缝问题采用何种加固方? align="" /> </p> <p> <span>    【一】桥梁桥墩损坏的现象及原?/span> </p> <p>     (1)网状裂缝。此种裂缝多发生在常水位以上墩身的向阳部位,裂缝???1-1??0mm,深1??0-1??5mm,长度不等主要原因是由于混凝土外部水化热和气温的温差,或日气温变化和日照影响而产生物温度拉压?或是由于混凝土干燥收缩而引起?</p> <p>     (2)从基础向上发展至墩台上部的裂缝;主要原因是基础松软或沉陷不均?</p> <p>559     (3)墩台身的水平裂缝裂缝呈水平状;原因多为混凝土浇注接缝不良所引起?</p> <p>     (4)由支撑垫石从下向上发展的裂缝主要是由于墩台帽在支撑垫石下未布置钢筋所?也可能是受到过大的冲击力?</p> <p>     (5)桥墩墩帽顺桥轴线横贯墩帽的水平裂缝主要由于局部应力所致。因梁和活载的作用力集中的通过支座传至桥墩,使墩顶周围其它部位产生拉应力?</p> <p>     (6)双柱式桥墩下承台的竖向裂缝由于桩基下沉不均或局部应力所致?</p> <p>     (7)支撑相临不等高墩的盖梁雉墙上的垂直裂缝裂缝多仅次于雉墙棱角部位及中线部位;严重时部分混凝剥落露?要是由于局部应力所致?</p> <p>     (8)墩台盖梁上自上至下的垂直裂缝其主要原因是桩基下沉不均引起盖梁不均匀受?</p> <p> <br /> </p> <p style="text-align:center;"> <img src="/uploads/image/20180518/20180518105128_2410.jpg" alt="【行业精粹】建筑纠偏公司针对桥梁墩柱裂缝问题采用何种加固方? width="640" height="854" title="【行业精粹】建筑纠偏公司针对桥梁墩柱裂缝问题采用何种加固方? align="" /> </p> <p> <br /> </p> <p> <span>    【二】桥梁桥墩损坏后<a href="http://zhayiyang.net/supply/" target="_blank"><strong>建筑纠偏?/strong><strong>?/strong></a>采取?/span>处理措施 </p> <p>     A. 桥墩加固方案?</p> <p>     墩台出现裂缝后,<strong><b>建筑纠偏公司</b></strong>应加强检查和观测。首先应根据裂缝的特征,结合设计、施工资料进行分析,查明裂缝性质、原因及其危害程度,然后再制定应对方案。常用的措施有: </p> <p>     (1)钢筋混凝土套箍或护套加固法。如桥梁墩台出现贯通裂缝,位防止裂缝的继续发展,使之能正常使用,可用钢筋混凝土围带或钢箍进行加固,加固时,一般在塘身上中下分设三道围?其间距应大小而定,一般为墩台高度?/10 左右,厚?0 采用-20CM。为加强于墩台的连接,应在墩台身内埋设直?0-25MM 的钢销直径?0 倍左右,把钢筋网扣在钢销上,埋钢销的孔要比销径大?5-20MM,先填满销孔再浇注混凝土,同时填塞裂缝。当墩台损坏严重,如有严重裂缝及大面积表面破损、风化和剥落时,则可采用围绕整个墩台设置钢筋混凝土护套的方法进行加固?</p> <p>     (2)表面封闭法即采用抹浆。凿槽嵌补、喷浆、填缝的方法使表面裂缝封? </p> <p>     (3)压力灌浆法即采用水泥灌浆或化学材料灌浆的方法,将浆液灌满结构内部裂缝?</p> <p>     (4)表面黏结玻璃布或钢板等材料的方法,既可达到封闭裂缝的目的,又能提高结构的强度和刚度?</p> <p> <br /> </p> <p>     B?? 墩柱加固方案 </p> <p>     ?)增大截面加固法。增大截面加固法在原有桥梁墩柱基础上,通过补加钢筋以及浇筑混凝土的形式增大混凝土截面面积,以起到加固的作用。增大截面加固法能够同时提高墩柱刚度以及抗压、抗弯承载力等,具有较高的可靠性?</p> <p>     ?)碳纤维布进行加固。墩柱中可采用缠绕碳纤维布的方式进行加固,碳纤维布的高强度能有效对墩柱起到约束,在纵向力的作用下,墩柱混凝土会处于三向受压状态,能够大幅度的提高墩柱抗压承载力,增强结构延性,对墩柱的抗震性能也能起到有效的提升?</p> <p>     碳纤维布加固墩柱,施工方便且强度高,对墩柱自重以及车辆通行影响较小,且当配套浸渍胶满足安全性鉴定时,在复杂环境中也能长期起到加固效果。但碳纤维布对刚度提升较为有限,不宜直接用于开裂墩柱的加固,且对施工环境要求较为严格,部分环境中需要采用特殊环境结构胶才能保证胶体正常固化?</p> <p>     桥梁墩柱的安全,与桥梁行驶安全有直接的关联,墩柱加固,也是桥梁养护中重要的环节。桥梁墩柱加固,<strong><a href="http://zhayiyang.net/" target="_blank">建筑纠偏公司</a></strong>会根据具体的适用对象,存在不同的优势与劣势,在应用时应根据具体情况选择合适的加固方法?</p> </div> <div class="n_article_next"><div>上一?<a href="240.html">【全面】郑州地基加固公司带您全面认知碳纤维加固</a></div> <div>下一?<a href="238.html">【涨知识】河南加固公司常用的碳纤维加固特点、处理要求及加固寿命</a></div> </div> <div class="tag">相关标签?a 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