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class="xypg-left-box xypg-left-contact"> <div class="xypg-left-title"> <h3>聯系我們<span>Contact Us</span></h3> </div> <div class="xypg-left-con"> <div class="page-wrap-contact"> <h4>南昌天高環?？萍脊煞萦邢薰?/h4> <p>電話：17770087478-鄭經理</p><p>傳真：0791-86690255</p><p>網址：江西省南昌市昌北經濟技術開發區天高工業園</p><p><br/></p> </div> </div> </div> </div> </div> <div class="page-wrap-right"> <div class="xypg-right-content">  <div class="news_detail"> <h1 class="title">垃圾填埋場污水調節池土工膜浮動罩施工方案</h1> <div class="info_title clearfix"> <h3 class="title_bar"> 發布日期：<span>2019-04-16</span> 作者：<span>南昌天高</span> 點擊：<span><script src="http://www.permaculturegreenhouse.com/data/include/newshits.php?id=545"></script></span> </h3> <div class="share">  <div class="bdsharebuttonbox"> <a href="#" class="bds_more" data-cmd="more"></a> <a href="#" class="bds_qzone" data-cmd="qzone"></a> <a href="#" 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="text-indent: 2em;"><span style="font-family: sans-serif; text-indent: 2em; font-size: 16px;">國內一些垃圾填埋場采用了給污水調節池加設HDPE土工膜浮動罩的措施,取得了較好地防臭效果、改善了填埋場的環境。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">污水池的土工膜浮動罩是一種將土工膜四周與池壁密封連接,膜浮在水面,形成密閉空間的水面覆蓋罩。相對水面剛性覆蓋罩,它的重量輕,成本低,結構簡單,易于大面積施工,跨度大或小的水池都能適用。因此,土工膜水面浮動覆蓋罩在國內外都取得越來越多的應用。垃圾填埋場污水調節池的浮動罩主要包括以下幾個部分:覆蓋系統,錨固系統、雨水集排系統和導氣系統。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">浮蓋膜是整個浮蓋系統中的關鍵部位。調節池面積一般都比較大,覆蓋膜長期處在雙向拉應力狀態,裸露的膜直接受陽光紫外線輻射,還要承受冬季嚴寒、低溫的考驗,直接受環境溫度變化的影響較大,膜接觸的又是腐蝕性較強的垃圾滲瀝液。因此,對覆蓋膜的抗拉力和抗老化性能要求比較高,而這兩項要求是普通HDPE土工膜材料所達不到的。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">為此,建議應要求:覆蓋膜材料的抗拉強度為拉伸斷裂強度、抗老化強度標準氧化誘導時間、環境應力開裂。這樣的指標比較適合浮蓋膜所處于的特殊工作環境對抗拉應力、抗老化性能的要求。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">除了使用環境對膜的抗拉性能、抗老化性能和抗腐蝕性能的要求高外,還要求膜的密度Z好小于水,自身才能浮在水面。目前國內外大多采用HDPE膜作為覆蓋膜材,它能較好地適應使用環境,滿足上述要求。膜的厚度一般采用2.0~2.5mm。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">1.錨固系統</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">主要是將覆蓋膜錨固的結構措施,有時還包括平衡配重系統的錨固。對于混凝土邊墻,可在墻頂或墻壁預埋螺栓,借助夾板固定,為防止膜拔出,可在膜的四周制成一較厚的凸緣。對于土質邊坡,可在坡頂采用錨固溝固定。溝的深度一般為600~800mm,寬度一般為800~1000mm,具體應計算確定。溝內回填材料可用夯實黏土或低標號混凝土。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">2.雨水集排系統</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">國外采用膜上壓重管與膜下配對漂浮物及兩者之間的土工膜組成固定位置的集排水槽。國內則只用壓重管在膜面將膜壓人水池中形成一條凹槽,將雨水收集和排走一般采用輕型、手提式水泵抽水。國內的浮動罩允許全膜蓄水。有的工程保持膜上有20~40cm的水深,并在膜上種植水生植物以使加蓋后的調節池美觀。有人認為膜上適量蓄水可以起到穩定浮蓋膜的作用,我認為膜上應有10~20cm深的蓄水,有利于避免陽光直射覆蓋膜,延緩膜的老化。</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">3.氣體導排系統</span></p><p style="text-indent: 2em;"><span style="font-size: 16px;">調節池中的垃圾滲瀝液會產生大量氣體,如果不排除會在密封膜下聚集,將膜鼓起,形成大面積的鼓包或局部的鼓包,在大風吹襲下可能發生安全問題。因此,必須及時將這些氣體排出。首先在膜下池頂四周設置HDPE集氣花管,收集池內氣體,再采用被動排氣措施或主動排氣措施將收集的氣體由膜上排氣管導出,直接燃燒或作其他處理。</span></p><p><br/></p></div> <h3 class="tag">相關標簽：<a href="http://www.permaculturegreenhouse.com/tag/%E5%85%89%E9%9D%A2%E5%9C%9F%E5%B7%A5%E8%86%9C">光面土工膜</a> </h3> <div 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