鋼波紋管由于(yu)其(qi)軸向(xiang)波(bo)紋的(de)存(cun)在,使得(de)徑向(xiang)承載力大大提高,同時由于(yu)其(qi)軸向(xiang)波(bo)紋的(de)存(cun)在,使其(qi)具有較好的(de)橫向(xiang)變(bian)形補(bu)償特性,因而具有較好的(de)不均勻沉降(jiang)變(bian)形的(de)適應(ying)能(neng)力。但(dan)沉降(jiang)值(zhi)也要(yao)在必定范圍內(nei),根據經驗值(zhi),涵洞沉降(jiang)值(zhi)在100厘米內(nei)。
鋼波紋管(guan)
所(suo)以遇到特(te)別地(di)(di)基需求加固(gu)處(chu)理(li)(li),尤其(qi)是軟土(tu)地(di)(di)基。當涵管處(chu)于軟土(tu)地(di)(di)基上(shang)時(shi),需對軟土(tu)路基進行(xing)處(chu)理(li)(li),涵洞地(di)(di)基處(chu)理(li)(li)方法(fa)(fa)同該路段的路基處(chu)理(li)(li)方法(fa)(fa),然后(hou)在(zai)其(qi)上(shang)填一層大于80cm厚(hou)的砂礫墊(dian)層。處(chu)理(li)(li)方法(fa)(fa),根據(ju)軟基厚(hou)度及填土(tu)高(gao)度,確認處(chu)理(li)(li)方法(fa)(fa)。
So meet special foundation need reinforcement treatment, especially soft soil foundation. When the culvert pipe is on the soft soil foundation, it is necessary to treat the soft soil subgrade. The culvert foundation treatment method is the same as that of the subgrade treatment method of this section, and then a layer of gravel cushion with a thickness of more than 80cm is filled on it. The treatment method is confirmed according to the thickness of soft foundation and filling height.
當淤泥小于4米深(shen)時(shi),選用清淤拋(pao)石處(chu)理(li)方法,一般(ban)清淤深(shen)度(du)為(wei)(wei)1.5-2.5米,拋(pao)石厚度(du)一般(ban)為(wei)(wei)1.5-2.5m,讓其安穩(wen)后,選用壓實(shi)機械壓實(shi),在其鋪設(she)不小于80厘米的(de)碎石墊(dian)層(ceng)。鋼波紋(wen)管現在工程上通(tong)常用櫻錘沖擊試驗來(lai)測量材(cai)料(liao)的(de)沖擊韌性。
鋼波紋(wen)管
其原理,先(xian)將(jiang)被(bei)測材料制(zhi)成必(bi)定形狀和尺寸的(de)試樣,安放(fang)在沖擊試驗機上(shang),把具有(you)必(bi)定重量(liang)的(de)櫻錘(chui)提到高度,此(ci)刻擺錘(chui)位(wei)能(neng)為(wei),然后讓其自有(you)下落,沖斷試樣,沖斷試樣后擺錘(chui)剩余的(de)能(neng)量(liang)為(wei)gH2,擺錘(chui)沖斷試樣所消耗的(de)位(wei)能(neng)為(wei)沖擊吸收功,用符號(hao)Akv表明,單位(wei)為(wei)J,即Akv=g(H1-H2)J。
鋼波紋管沖擊韌性按施工圖規劃要求標記波紋涵管方位,開挖溝槽。溝槽的寬度大于波紋鋼管直徑的2倍(保證管外小單側空隙不小于1.5m),以滿意施工空間要求,便當波紋涵管組裝,也有利于波紋鋼管周圍的回填及密實。溝槽的開挖深度依規劃埋深再下挖30cm~80cm根底深度(視地質情況而定)。//hanihanbj.com/
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