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url:"/index.php?s=api&c=module&siteid=1&app=news&m=hits&id=71", dataType: "jsonp", success: function(data){ if (data.code) { $(".dr_show_hits_71").html(data.msg); } else { dr_tips(0, data.msg); } } }); </script></span></span> <span>發表時間：2022-03-10</span> </p> </div> <i></i> <p class="label"> </p> </div> <div class="con" id="wjc"> <p> 聲屏障隔聲原理:根據幾何聲學原理，聲音在室外是沿直線傳播的，如果在聲源和接收點之間插入一道墻體或者具有一定隔聲量的物體阻擋聲音的傳播路徑，使得在接收位置看不到聲源，接收不到直達聲，則在接收點的聲壓級就會明顯降低，這就是聲屏障隔聲原理。（有些時候我們無法將噪聲源完全封閉起來，又需要較低的造價獲得理想的降噪效果。）</p><p><br/></p><p> 由于聲波在遇到障礙物時會發生反射現象，故在聲源和接收者之間插入密實的屏障會降低噪聲。</p><p> 由于聲源具有波動特性，所以總有一部分聲波從聲屏障的頂端繞射過去，這使得聲屏障的衰減受到了一定的限制。</p><p><br/></p><p> 影響聲屏障插入損失的因素有很多，如聲屏障的相對位置、高度以及形式等。作為一種建筑形式的存在，必然會對周圍的環境產生影響。一個設計優秀的聲屏障，除了要有明顯的噪聲降低作用，還應該能和周圍環境融合在一起，不但不破壞原有的景觀，還應該為環境增加新的亮點。</p><p><br/></p><p>基本設計原則</p><ul class=" list-paddingleft-2" style="list-style-type: disc;"><li><p>（1）聲屏障的水平位置應盡量的靠近聲源，這樣有利于加大屏障的陰影區，從而提高其聲衰減的作用。</p></li><li><p>（2）聲屏障越高，其陰影區域越大，對聲音的衰減作用也就越大，這是顯而易見的。但聲屏障過高，可能會帶來結構、環境和造價等諸多問題，所以聲屏障本身不可能建造得太高。在設計聲屏障時應該因地制宜，利用地形地貌，提高聲屏障的有效高度，以最小的代價，獲取良好的效果。</p></li><li><p>（3）聲屏障的形式對聲衰減的效果也有很大的影響。如果在聲屏障的頂端向聲源方向伸出一個挑檐，就相當于將整個聲屏障向聲源方向移動，可以有效地增加陰影區域的深度和面積。</p></li></ul><p><br/></p><p>環境利用點</p><ul class=" list-paddingleft-2" style="list-style-type: disc;"><li><p>（1）融合環境。</p></li><li><p>（2）立體綠化：利用聲屏障進行立體綠化。</p></li><li><p>（3）開闊視野：在道路兩側設置了聲屏障后，會使道路內的視野狹窄，尤其是在一些風景優美的地段，影響乘車人對大自然的觀賞。為了解決這一問題，可采用透明板作為聲屏障的材料。</p></li></ul><p><br/></p><p>聲屏障的維護</p><p> 由于聲屏障長期暴露于風雨中、灰塵之中，所以聲屏障的清潔是日常維護中的重要工作。又因為聲屏障的面積非常大，如果依靠人工進行清洗，將花費很大的人力物力。因此在設計聲屏障的時候，就應該考慮到清洗的問題。</p><p><br/></p><p>聲屏障的綜合利用</p><p> 由于聲屏障的面積很大，而且長期暴露于日光之下，如果將太陽能采集與聲屏障相結合，可以充分利用聲屏障的面積，達到綜合利用的目的。</p><p><br/></p><p>應用范圍</p><p> 聲屏障主要用于鐵路和公路沿線聲屏障主要用于高速公路、高架復合道路、城市輕軌地鐵等交通市政設施中的隔聲降噪、控制交通噪聲對附近城市區域的影響，也可用于工廠和其它噪聲源的隔聲降噪。聲屏障分為純隔聲的反射型聲屏障，和吸聲與隔聲相結合的復合型聲屏障，后者是更為有效的隔聲做出來的。大多數的聲屏障都選用吸聲和隔聲混合型的產品，該型產品的特點是對道路噪聲的產生和傳遞特征有針對性地控制。如汽車與道路摩擦聲或機車與軌道摩擦聲在道路下部，聲音有通過屏體上部繞射的特征，所以在設計上采用上下吸聲，中間隔聲的結構，這樣可以有效地減弱噪聲的繞射；聲屏障的中間使用透明的反射型隔聲板，能有效地中斷聲波的傳播途徑；同時也為司機和居民提供一個開闊的視野環境。建筑聲學領域，通過聲學治理，控制混響時間及室內聲環境，滿足專業場館要求。</p><p><br/></p> </div> </div> <div class="context clearfix"> <p class="prevNews bot_left">上一篇：沒有了</p> <p class="NextNews bot_right">下一篇：<a href="http://m.martialartslv.com/cjwt/2022031072.html">聲屏障選用原則</a></p> </div> </div> <div class="mub02xgyd"> <div class="top mub02Top"> <h2>推薦閱讀</h2> </div> <div class="conBox"> <ul class="clearfix"> <li><a href="http://m.martialartslv.com/cjwt/2022031073.html" title="道路聲屏障項目施工要求">道路聲屏障項目施工要求</a> <span>2022-03-10</span></li> <li><a href="http://m.martialartslv.com/cjwt/2022031072.html" title="聲屏障選用原則">聲屏障選用原則</a> <span>2022-03-10</span></li> <li><a href="http://m.martialartslv.com/cjwt/2022031071.html" 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