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        德國技術給“馬路肚臍眼”開良方

        發布時間: 2011-07-21 10:03   來源: 漢網-武漢晚報   進入電子報

          昨日下午,武漢市城管、水務、110聯動多部門,聯合見證了一場特殊“年考”:東湖開發區2000多套新型窨井蓋,上崗一年多來,創下無一被盜、無一碎裂、無一沉降的紀錄。

          窨井蓋頻頻失蹤

          窨井蓋是城市地下世界的“入口”。但受到車輛碾壓、不法分子偷竊,這些大馬路上的“入口”經常門戶大開。隨著井蓋缺失、沉降,馬路窨井容易陷人陷車,成為城市治理難點之一的馬路“肚臍眼”。

          治理“馬路肚臍眼”有多難?業內人士表示,道路窨井蓋承載車來車往,對其自身承壓能力要求極高;而目前承壓最強的鐵井蓋,又易被竊賊盯上,且難以防范。兩者兼備后,鋪設井蓋施工工藝不過關,易造成井蓋受壓沉降。

          據市110聯動辦負責人介紹,為抓好窨井蓋問題,武漢各部門不遺余力。最初鑄鐵井蓋易被盜,后換為復合材料井蓋。但復合材料強度不夠,經常被車壓破。去年,武漢市力推“馬路肚臍眼”整治。在主次干道上,一舉抹平10多萬個“肚臍眼”。但傳統窨井蓋被盜、破損、沉降問題,仍難找到根治之法。110聯動熱線里,市民投訴不絕。

          “洋技術”破解窨井蓋難題

          “去年在光谷大道、新竹路、佳園路等路段,共鋪設2000多套新型井蓋,運行一年多,這些井蓋無一被盜、無一碎裂、無一沉降。”昨日,東湖開發區建設局水務科人士說。

          這種新型窨井蓋系引進德國技術生產。記者在現場看到:施工人員在井蓋周圍挖出一個深約10厘米、邊長各約一米的六邊形施工面。掘出舊井蓋后,放入一個10多厘米高的圓形模具。隨后施工面內涂上粘合劑,繼而一層層鋪設、鑿實瀝青。鋪設好后取出模具,放入新型窨井蓋。然后用碾壓機一遍遍碾實,直到井蓋與施工面、路面齊平。一套工序下來,只需兩個多小時。而原先的井蓋鋪設,需要48個小時。

          據水務部門人士介紹,新型窨井蓋針對被盜、沉降、碎裂“三頑癥”設計。新型窨井蓋與路面鑄成一體,車輛通過時85%的壓力,都分散到周圍路面。大大分散壓力,克服了井蓋沉降問題;新型窨井蓋自身硬度高。采用球墨鑄鐵材質的蓋體,是傳統鑄鐵蓋硬度的3至4倍。車輪碾壓之下,蓋體不再是“易碎品”;新型窨井蓋與邊框間裝有防盜鉸鏈。不用專用撬杠,難以將井蓋撬開。借助此舉,新型井蓋讓盜賊“下手”難度倍增。

          此外,新型井蓋內設置有嵌入式膠條、防彈起簧片等,可有效減少車輛通過噪音、防止車輛壓翻或彈起井蓋。

          全市窨井有望都用新井蓋

          昨日,市有關部門負責人現場觀摩新型井蓋后說:“‘馬路肚臍眼’是武漢‘城管革命’要解決的重要問題,這種新型井蓋正好大展拳腳。”

          據介紹,新型井蓋成本加安裝,一套約2600元。舊有鑄鐵井蓋成本加安裝費用,需1800多元。復合井蓋的費用,為1500多元。新井蓋看似貴,卻物有所值,它壽命可達10年。而現有復合井蓋,壽命僅1年多。長遠計算,新型井蓋更加劃算。

          我市目前有各類窨井、線纜井、格柵井120多萬口,分屬供水、供電、水務、廣電、燃氣等19個部門。這種新型井蓋,有望在全市推廣,破解“馬路肚臍眼”頑癥。

        (本文來源:漢網-武漢晚報 編輯:時事七)
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