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/> ?)桩?.6-0.8m应埋设双管;桩径0.8-2.0m应埋设三根管;桩?.0m以上应埋设四根管,根据赤峰桥具体情况,桩基可埋设三根管?br /> ?)声波检测管宜采用钢管、塑料管或钢质波纹管,其内径宜为50?0mm。检测管连接处应光滑过渡,管口应高出桩顶100mm以上,且各检测管管口高度应一致,管的下端应封闭,上端应加盖,管内不得有异物,管身不得有破损?br /> ?)检测管可焊接或捆扎在钢筋的内侧,检测管之间应互相平行?br /> 现场检测法<br /> ?)现场检测前测定声波监测仪发射至接受系统的延迟时间t。并计算声时修正值?br /> ?)测量时发射与接收探头应以相同标高或保持固定高差同步升降?br /> ?)测量点距为40cm,当发现异常时再加密?0cm.<br /> ? )选择适当的发射电压和放大器增益,并再测试过程中保持不变?br /> ?)实时显示和记录接收信号的时程曲线?br /> ?)将多根<strong><a href="http://www.jlrnsb.com/">翅片?/a></strong>以两根为一个检测剖面进行全组合,分别对多有剖面完成检测?br /> ?)每组检测管测试完成后,测试点应随机重复抽测10%,其声时相对标准差不应大于5%;波幅相对标准差不应大?0%?/p></div> </div> </div> <div class="clear blank10"></div> <div class="Author">(作者:翅片? 编辑:admin)</div> <div class="clear blank10"></div> <div class="articlekey"><strong>文章热词?/strong><a href="/plus/tags.asp?n=%E7%BF%85%E7%89%87%E7%AE%A1" target="_blank">翅片?/a> </div> <div class="clear"></div> <div class="articlebook"> <h2><strong>上一篇:</strong><a href="/html/cpgzs_690_2517.html" title="单金属翅片管和双金属翅片管的区别">单金属翅片管和双金属翅片管的区别</a></h2> 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