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class="bds_tsina" data-cmd="tsina"></a> <a href="#" class="bds_tqq" data-cmd="tqq"></a> <a href="#" class="bds_renren" data-cmd="renren"></a> <a href="#" class="bds_weixin" data-cmd="weixin"></a> </div> <script> window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdPic":"","bdStyle":"0","bdSize":"16"},"share":{},"image":{"viewList":["qzone","tsina","tqq","renren","weixin"],"viewText":"分享到：","viewSize":"16"},"selectShare":{"bdContainerClass":null,"bdSelectMiniList":["qzone","tsina","tqq","renren","weixin"]}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)]; </script>  </div> </div> <div class="content"><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;"><a href='http://www.popechart.com/' target='_blank' class='key_tag'><font color=#2086ee><strong>沉井下沉</strong></font></a>工程技術分析</span></p><p style="line-height: 1.75em;"><img src="/data/upload/image/20190428/1556412785888825.jpg" title=" 沉井下沉公司" alt=" 沉井下沉公司" width="500" height="333" border="0" vspace="0" style="width: 500px; height: 333px;"/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">沉井下沉Z常用的技術主要有全降排水下沉施工工藝、部分降排水下沉施工工藝和不排水下沉施工工藝。它們的適用條件不同，并有著自身的優點和缺點。降排水下沉即在沉井附近設置降水井降低地下水水位 , 使沉井在少水的狀態下取土下沉。降排水下沉包含部分降排水下沉和全部降排水下沉。江陰大橋錨旋沉井地表以下范圍內，土質松軟，承壓水不大，采用了降排水施工，降排水深度為地面以下，施工工效較高。不排水下沉即不對地下水進行處理，保持沉井內外水頭差在一定的范圍內，水下取土下沉。南寧永和大橋主南岸橋臺沉井、博羅大橋沉井等均采用該工藝進行實施。本工程沉井所處地質以砂層為主，具有豐富的潛水，與江水互補。這無疑增加了降排水的難度。為確定降排水下沉技術的可行性 , 本工程進行了江堤沉降變形分析。由江堤沉降變形分析結果可知<a href='http://www.popechart.com/product/cjsg2e3/' target='_blank' class='key_tag'><font color=#2086ee><strong>沉井施工</strong></font></a>降水引起壩身和地基的地下水位下降幅度較大 , 使江堤產生了較大的附加沉降量。Z大沉降量產生在江堤內側坡腳附近，距沉井越近，施工降水深度越大，產生的地基沉降量也越大。這表明全降排水施工對沉井周圍的大堤和建筑物產生影響過大，故全降排水施工不適用于本工程 , 部分降排水下沉會比全降排水下沉更加有利。沉井長，寬，下沉深度為，沉井一旦發生偏斜，糾偏就比較困難，所以底節沉井的下沉精度至關重要，將直接影響到沉井施工完成后的精度。為保證底節沉井的下沉精度，必須采取合適下沉方式進行有效的控制，故部分降排水下沉與全降排水下沉要比不排水下沉更加有利于底節沉井的下沉精度控制，并應盡量加大降水下沉的深度，當沉井形成下沉導向后，后期將不易傾斜。</span></p><p><br/></p></div> <h3 class="tag">本文網址：http://www.popechart.com/news/403.html </h3> <h3 class="tag">關鍵詞：<a href="http://www.popechart.com/tag/%E6%B2%89%E4%BA%95%E4%B8%8B%E6%B2%89%E5%85%AC%E5%8F%B8">沉井下沉公司</a>,<a href="http://www.popechart.com/tag/%E6%B2%89%E4%BA%95%E4%B8%8B%E6%B2%89%E6%96%BD%E5%B7%A5">沉井下沉施工</a>,<a href="http://www.popechart.com/tag/%E6%B2%89%E4%BA%95%E4%B8%8B%E6%B2%89%E5%B7%A5%E7%A8%8B">沉井下沉工程</a> </h3> <div class="page">上一篇：<a href="http://www.popechart.com/news/401.html">沉井施工的一般要求的一般要求</a><br />下一篇：<span><a href="http://www.popechart.com/news/404.html">沉井下沉時，為什么第一次下沉之前刃腳要做墊層，而之后的幾次下沉就不需要做墊層？</a></span></div> </div> <div class="relateproduct relate"><h4>Z近瀏覽：</h4> <div class="content"> <ul id="relate_n" class="news_list clearfix"> </ul> </div> </div>  <div 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