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    您的位置:首頁 > 萬方期刊網 > 論文分類> 劇院裝修關于聲學處理的案例分析

    劇院裝修關于聲學處理的案例分析

    來源:萬方期刊網  時間:2018-04-16 10:11:36  點擊:

      深圳市中孚泰文化建筑建設股份有限公司 廣東深圳 518000

      摘要:文章根據實際案例對劇場裝修的聲學施工技術案例要點進行分析,期望同行之間可以互相指導建議,提高裝飾裝修施工水平。

      關鍵詞:劇院裝修;施工技術;聲學處理

      1.劇場聲學裝飾施工技術概況

      某劇場的主體結構主要為鋼結構體,包括核心區域中心劇場,整個結構完全有幾萬噸鋼材組裝而成,從池座、樓座、高空天棚等都是鋼結構,劇場內部裝修在劇院建筑中是非常另類的,整個劇場墻面為進口陽極氧化A5系穿孔鋁板,鋁板后面配備吸音幕簾及弧形聲學隔墻,在幕簾前面安裝音響設備達到環繞音響效果。劇場分為三層樓座,這在中國劇院建筑中也是僅有的例子,三層樓座攔河是由三層石膏板面層完成的三維曲面造型,在面層上安裝了4000個GRG擴散體達到漫反聲效果。無論從設計還是施工都是非常具有挑戰性的工作。在深化設計施工過程中,我項目部總結出了以下關于劇場聲學裝修的的施工技術案例

      2、案例一:劇場樓座池座鋼結構基座聲學安裝方案

      方案及施工工藝分析:這座劇場非常特殊,劇場主體結構為鋼結構,分三層樓座一層池座,樓座及池座需重新焊接次生鋼結構基礎才能進行面層施工,這和以往的劇場樓座和池座都是鋼筋混凝土結構有著很大的區別,。項目部組織施工人員進行現場實地測量,著手進行了深化設計工作,最開始鋼結構設計只是普通的鋼結構深化設計,同原結構的鏈接方式都是直接滿焊的形式,我們把深化設計圖紙報給負責劇場聲學設計的MBBM聲學咨詢公司后,被否定了,對聲學要求極高的MBBM要求所有和原結構鏈接的方式必須要有聲學處理,杜絕出現聲橋,并要求最大限度的降音。那就是要求次生結構必須和原建筑結構有一個緩沖層,經過設計方和施工方的討論和資料的搜集,我們從以往進行魯班獎評獎過程中了解的機房基礎減震設備(附圖1)得到了啟示,有了初步的方案:在原結構與次生結構鏈接用兩塊12mm厚鋼板鏈接,鋼板之間放一層減12mm厚減震墊,鋼板與鋼板用φ14螺栓鏈接,螺栓套內徑為φ14mm減震圈,達到完全減震的作用(附圖2)。在進行樣板實驗后,發現直接和原結構連接的減震墊安裝完成后,進行立柱與鋼板的焊接中,由于溫度過高融化了減震墊,使其失去了相應的減震隔聲效果。這肯定是聲學不能容忍的事情,最后我們又重新進行了深化,將于原結構連接的立柱分成兩段,在立柱之間用兩塊鋼板連接,先將鋼板分別焊接在兩段立柱上,在鋼板與鋼板之間放減震墊和連接鋼板的螺栓上安裝減震圈(附圖3),隨之解決了施工的難點。

      檢測效果:樣板得到MBBM認可后,我司安排專業鋼結構施工隊進行現場放線定位,確定每一個立柱的位置,并按樣板進行聲學處理連接。整體工程完成后,MBBM進行了建聲測試,對于這種方式的聲學處理效果很滿意。

      3、案例二:攔河GRG擴散體深化設計及施工工藝方案

      GRG擴散體方案確定及施工工藝分析:由于整個劇場墻面為穿孔金屬鋁板,且鋁板后面安裝了吸音幕簾,可以說國際會議中心劇場的吸聲效果非常之到位了,在聲學慢反射方面主要是依賴于攔河GRG擴散體來實現這一要求。但原設計的攔河擴散體布局非常凌亂沒有規律可言,從施工管理角度考慮成本太高難度太大,我們對攔河擴散體在犀牛圖上進行了測量和分類,結果有40多種不同大小的擴散體規格,總共有4000多個,等于說需要進行40組開模制作加工,每組只需生產100個左右,從工程成本角度考慮是極不可取的事情,項目部進行了分析和整理,最后從中挑選出了9種不同規格的擴散體,有規律的進行了排版,即保證了聲學要求也達到了美觀,最后得到了聲學顧問MBBM及國會總設計藍天組認可。

      在施工階段,為達到設計效果要求,將4000個擴散體在電腦上排版并按照1:1的比例打出白圖現場直接貼在攔河上定位每一個擴散體的位置,最后我們安裝完成的GRG擴散體同圖紙基本沒有出入,完全達到了設計師的要求。

      4.案例三:劇場疏散通道工字鋼灌沙方案確定及施工工藝

      方案確定及施工工藝分析:由于大連國際會議中心主體結構為鋼結構,而中心劇場同建筑其他區域連接主要是通過疏散通道工字鋼作為轉換部位,經MBBM聲學專家多方認證后,此區域的工字鋼很容易形成中心劇場同外界的聲橋的聲學事故,影響劇場的建聲效果,需對工字鋼進行聲學處理,即要求在工字鋼內灌注干燥均勻的細沙消除內外聲音的傳到。

      MBBM提出后,經施工方深化設計討論,存在施工難度,由于工字鋼結構安裝已經完成,裝修天花龍骨安裝也基本到位,如果先焊接鋼板封閉,沙子無法灌注,如果先灌注沙子,沙子會流失,一樣無法達到施工要求。經施工單位多方討論,在鋼板上口預留50mm寬縫,焊接完成后,從預留縫里灌注沙子,最后用40k玻璃棉密封,既能達到設計要求又能解決施工難點。

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