施工過程中,嚴(yan)格遵(zun)守操作(zuo)規則,嚴(yan)防落物傷人(ren)及墜落事故。各種電(dian)(dian)氣(qi)設備運轉和漏電(dian)(dian)保護裝置,不準(zhun)(zhun)隨意改換(huan)安裝方式,尤其(qi)對于施工作(zuo)業的(de)(de)投光燈,裝接工作(zuo),一點不準(zhun)(zhun)馬虎、絲毫不能漏電(dian)(dian),確(que)保安全。所有容易(yi)碰砸的(de)(de)電(dian)(dian)氣(qi)設備加裝防護罩或遮欄,防止碰傷危險。
鋼波紋涵管(guan)施工(gong)現場的安全要(yao)求有哪些(xie)?
波紋(wen)涵管管底兩側模形部位的(de)密實(shi)度很重要,一般設(she)計采用現澆C20細石混凝(ning)土護壁全斷面填筑,以(yi)保(bao)證模形區域(yu)的(de)密實(shi),利于波紋(wen)涵管的(de)穩定(ding)性。波紋(wen)涵管頂部填土每層厚15cm,壓(ya)實(shi)度應滿足規范(fan)要求。涵管沒(mei)有達到(dao)小填土高度時(shi),不得使用大于6T的(de)壓(ya)路機械碾(nian)壓(ya),也(ye)不允(yun)許任何重型車輛通(tong)行(xing)。
鐵路(lu)鋼波紋(wen)管
參加(jia)金(jin)屬波紋(wen)涵管施工(gong)(gong)(gong)(gong)人員要熟(shu)知本(ben)工(gong)(gong)(gong)(gong)種的(de)安全操作(zuo)規程,堅守崗位。特殊工(gong)(gong)(gong)(gong)種人員如(ru)電工(gong)(gong)(gong)(gong)、電焊工(gong)(gong)(gong)(gong)、混(hun)凝(ning)土工(gong)(gong)(gong)(gong)、起重(zhong)工(gong)(gong)(gong)(gong)等施工(gong)(gong)(gong)(gong)人員,必須經(jing)過專門培訓,熟(shu)練(lian)掌握操作(zuo)要求,嚴(yan)格執行(xing)本(ben)工(gong)(gong)(gong)(gong)種的(de)安全操作(zuo)規程,必須隨身攜帶有關證件(jian)(或復印件(jian))上崗備(bei)查。搭(da)設(she)金(jin)屬波紋(wen)涵管施工(gong)(gong)(gong)(gong)支架(jia)要隨時檢查支架(jia)的(de)穩(wen)定性,并且加(jia)固。支架(jia)完成后,要檢查、驗算(suan)支架(jia)的(de)承力(li),滿足承載要求后再進行(xing)上部施工(gong)(gong)(gong)(gong)。
波紋涵管頂部及兩(liang)(liang)側(ce)20m范圍(wei)內(nei)不允許使用(yong)機械(xie)進行強夯,洞身兩(liang)(liang)側(ce)應用(yong)人工(gong)或小型機具(ju)對(dui)稱夯填(tian)(tian),待填(tian)(tian)方高出涵頂1米時,可采用(yong)機械(xie)填(tian)(tian)筑。在完成回填(tian)(tian)之后(hou),終(zhong)截(jie)面尺(chi)寸與組裝時的尺(chi)寸差異更大不得超過2%。如截(jie)面變形量超過變形范圍(wei),應立即終(zhong)止施工(gong),查明(ming)原因,采取相應措施將變形量控制在標準要求范圍(wei)內(nei)。
填(tian)筑(zhu)時應分層(ceng)填(tian)筑(zhu)、分層(ceng)壓(ya)(ya)實,每(mei)層(ceng)壓(ya)(ya)實厚度為15cm,壓(ya)(ya)實度要(yao)求(qiu)達到設計(ji)要(yao)求(qiu)后方可進(jin)行下一層(ceng)填(tian)筑(zhu)。填(tian)筑(zhu)必須(xu)在波(bo)紋涵管兩側對稱同步進(jin)行,兩側的回(hui)填(tian)土高差不(bu)得大(da)于(yu)15cm。對于(yu)有(you)兩端(duan)(duan)擋墻(qiang)的涵洞,回(hui)填(tian)應從兩端(duan)(duan)向結構中心進(jin)行。如果因(yin)偏土壓(ya)(ya)造(zao)成鋼波(bo)紋涵管變形的,應修(xiu)正截(jie)面尺寸后重新壓(ya)(ya)實。
波(bo)(bo)紋涵(han)管(guan)兩側部位回填(tian)(tian):填(tian)(tian)土(tu)之前,可在波(bo)(bo)紋涵(han)管(guan)兩側面(mian)用(yong)紅油漆按每15cm高(gao)(gao)度(du)作出填(tian)(tian)高(gao)(gao)標(biao)示,填(tian)(tian)筑時按標(biao)注線控制。在管(guan)身更大(da)(da)直徑兩側50cm外可采用(yong)12~18T的(de)壓路機應實(shi),50cm范圍(wei)內(nei)采用(yong)小型(xing)夯實(shi)機械夯實(shi),以避免大(da)(da)型(xing)機械設(she)備對涵(han)管(guan)的(de)撞擊(ji)。靠(kao)近管(guan)體周圍(wei)50cm范圍(wei)內(nei),不允許有大(da)(da)于(yu)50mm的(de)石塊、混凝土(tu)塊或其他有害腐蝕(shi)材料。
壓(ya)(ya)(ya)(ya)實(shi)度(du)(du)要求:基礎(chu)應采(cai)用振動壓(ya)(ya)(ya)(ya)實(shi)機進(jin)行分層碾壓(ya)(ya)(ya)(ya),碾壓(ya)(ya)(ya)(ya)時應根(gen)據回填材料的含水量及擊實(shi)曲(qu)線灑水碾壓(ya)(ya)(ya)(ya),壓(ya)(ya)(ya)(ya)實(shi)度(du)(du)不小于規范(fan)要求。具體施工(gong)技術(shu)要求可參閱(yue)《公(gong)路(lu)(lu)路(lu)(lu)基設(she)計規范(fan)》和(he)《公(gong)路(lu)(lu)路(lu)(lu)基施工(gong)技術(shu)規范(fan)》。波(bo)紋涵(han)管兩側及頂(ding)部100cm范(fan)圍內的回填及壓(ya)(ya)(ya)(ya)實(shi)度(du)(du)要求,圖中涵(han)洞兩側回填土壓(ya)(ya)(ya)(ya)實(shi)度(du)(du)要求執行,當涵(han)頂(ding)填土厚度(du)(du)超(chao)過(guo)100cm時,填土壓(ya)(ya)(ya)(ya)實(shi)度(du)(du)與同一(yi)標高路(lu)(lu)基壓(ya)(ya)(ya)(ya)實(shi)度(du)(du)要求相同。(hanihanbj.com)
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