鋼波紋管由于其軸向(xiang)(xiang)(xiang)波(bo)紋(wen)的(de)(de)存(cun)在,使得徑向(xiang)(xiang)(xiang)承載力(li)大(da)大(da)提高,同時由于其軸向(xiang)(xiang)(xiang)波(bo)紋(wen)的(de)(de)存(cun)在,使其具有較好的(de)(de)橫向(xiang)(xiang)(xiang)變形補償(chang)特性,因而具有較好的(de)(de)不均勻(yun)沉(chen)(chen)降變形的(de)(de)適應(ying)能力(li)。但沉(chen)(chen)降值也要(yao)在必定范圍內,根據經驗值,涵洞(dong)沉(chen)(chen)降值在100厘米內。
鋼波紋管
所以(yi)遇到(dao)特(te)別地基(ji)需(xu)求加固(gu)處(chu)理,尤其是(shi)軟土(tu)地基(ji)。當涵管處(chu)于(yu)軟土(tu)地基(ji)上時,需(xu)對(dui)軟土(tu)路(lu)基(ji)進(jin)行處(chu)理,涵洞地基(ji)處(chu)理方(fang)法(fa)同該路(lu)段(duan)的路(lu)基(ji)處(chu)理方(fang)法(fa),然(ran)后在其上填一層大于(yu)80cm厚的砂礫(li)墊層。處(chu)理方(fang)法(fa),根據軟基(ji)厚度及填土(tu)高度,確(que)認(ren)處(chu)理方(fang)法(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(xiao)(xiao)于4米(mi)深(shen)時,選用(yong)(yong)清(qing)淤拋石(shi)處理方法,一般清(qing)淤深(shen)度(du)為1.5-2.5米(mi),拋石(shi)厚(hou)度(du)一般為1.5-2.5m,讓(rang)其(qi)安穩后,選用(yong)(yong)壓(ya)實機械(xie)壓(ya)實,在其(qi)鋪設(she)不(bu)小(xiao)(xiao)于80厘米(mi)的(de)(de)碎(sui)石(shi)墊(dian)層。鋼波紋管現在工(gong)程上通常用(yong)(yong)櫻錘沖(chong)擊試驗(yan)來測量(liang)材料的(de)(de)沖(chong)擊韌性。
鋼(gang)波(bo)紋管(guan)
其(qi)原(yuan)理,先將被測材料制成(cheng)必(bi)定(ding)形狀和尺寸的(de)試樣(yang)(yang),安放在沖擊(ji)試驗機上(shang),把具有必(bi)定(ding)重(zhong)量的(de)櫻錘(chui)提(ti)到(dao)高度,此(ci)刻擺(bai)錘(chui)位(wei)能為(wei),然(ran)后讓其(qi)自有下落(luo),沖斷(duan)(duan)試樣(yang)(yang),沖斷(duan)(duan)試樣(yang)(yang)后擺(bai)錘(chui)剩余的(de)能量為(wei)gH2,擺(bai)錘(chui)沖斷(duan)(duan)試樣(yang)(yang)所消耗的(de)位(wei)能為(wei)沖擊(ji)吸收功,用符(fu)號Akv表(biao)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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