無砂管質量控制

在施工(gong)階段，控制的(de)要點就(jiu)是嚴格按照審批通(tong)過的(de)“施(shi)工組織設(she)計”和(he)“施工方案”進行(xing)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)控(kong)(kong)制(zhi)，并(bing)做好(hao)關鍵工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)序工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)程(cheng)(cheng)、隱蔽工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)程(cheng)(cheng)驗收(shou)，閉水(shui)試驗及(ji)涂裝(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)的(de)(de)質量檢驗工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作。由(you)于(yu)頂(ding)(ding)(ding)管(guan)(guan)(guan)(guan)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)藝的(de)(de)特殊性(xing)，在施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)過程(cheng)(cheng)中(zhong)(zhong)，重(zhong)點(dian)做好(hao)以(yi)下內(nei)容的(de)(de)控(kong)(kong)制(zhi)；工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作井(jing)作為頂(ding)(ding)(ding)管(guan)(guan)(guan)(guan)機(ji)的(de)(de)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作場(chang)地(di)，須(xu)(xu)滿足(zu)頂(ding)(ding)(ding)管(guan)(guan)(guan)(guan)過程(cheng)(cheng)中(zhong)(zhong)結構(gou)的(de)(de)穩(wen)定，且截面設計須(xu)(xu)滿足(zu)頂(ding)(ding)(ding)管(guan)(guan)(guan)(guan)千(qian)斤(jin)頂(ding)(ding)(ding)、后(hou)背尺寸要求。在沉(chen)井(jing)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)過程(cheng)(cheng)中(zhong)(zhong)，重(zhong)點(dian)監控(kong)(kong)沉(chen)井(jing)的(de)(de)終沉(chen)階(jie)段，尤其是在地(di)質條件不好(hao)的(de)(de)情(qing)況下。對施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)過程(cheng)(cheng)出現的(de)(de)問(wen)題，應及(ji)時(shi)進行(xing)分(fen)析和(he)(he)糾偏(pian)，保(bao)證沉(chen)井(jing)下沉(chen)和(he)(he)干封(feng)底的(de)(de)質量。在頂(ding)(ding)(ding)管(guan)(guan)(guan)(guan)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)前，要作好(hao)扎扎實(shi)實(shi)的(de)(de)技術交底和(he)(he)交底工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作。讓所(suo)有(you)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)人員除(chu)了(le)掌握(wo)頂(ding)(ding)(ding)管(guan)(guan)(guan)(guan)操作技能(neng)和(he)(he)注意事(shi)項外，還(huan)應掌握(wo)處置涌(yong)水(shui)、流砂等突發事(shi)的(de)(de)方法(fa)。必須(xu)(xu)按照(zhao)設定的(de)(de)管(guan)(guan)(guan)(guan)道中(zhong)(zhong)心線與頂(ding)(ding)(ding)管(guan)(guan)(guan)(guan)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作井(jing)、接(jie)(jie)收(shou)井(jing)建立地(di)面與地(di)下測量控(kong)(kong)制(zhi)系統。當頂(ding)(ding)(ding)管(guan)(guan)(guan)(guan)頂(ding)(ding)(ding)進長度較長時(shi)，必須(xu)(xu)保(bao)證通(tong)風機(ji)械(xie)的(de)(de)正常運轉，以(yi)確保(bao)管(guan)(guan)(guan)(guan)內(nei)通(tong)風良(liang)好(hao)，避免。接(jie)(jie)口(kou)頂(ding)(ding)(ding)合時(shi)，應保(bao)證平整對中(zhong)(zhong)頂(ding)(ding)(ding)入，橡膠(jiao)止水(shui)圈(quan)應均(jun)勻(yun)擠壓(ya)到位，接(jie)(jie)口(kou)鋼(gang)套環或承插口(kou)管(guan)(guan)(guan)(guan)壁(bi)密貼，木墊板(ban)無松動脫(tuo)落，接(jie)(jie)口(kou)間(jian)隙均(jun)勻(yun)一(yi)致。頂(ding)(ding)(ding)管(guan)(guan)(guan)(guan)出洞前，必須(xu)(xu)進行(xing)以(yi)下的(de)(de)控(kong)(kong)制(zhi)，確保(bao)頂(ding)(ding)(ding)管(guan)(guan)(guan)(guan)順利出洞。A對(dui)頂管整個系(xi)統(tong)的安裝，單機調試進行(xing)檢查，并(bing)進行(xing)設備聯(lian)運調試。B檢查洞口(kou)橡膠(jiao)止水圈的安(an)裝是(shi)否(fou)牢固，尺寸(cun)是(shi)否(fou)準確，是(shi)否(fou)能完(wan)全封(feng)堵機頭與洞口(kou)空隙。C檢(jian)查洞(dong)(dong)口前方的土體(ti)是否正采取了(le)加固措(cuo)施，洞(dong)(dong)口前方是否建立了(le)沉降監測。機頭出(chu)洞(dong)(dong)時(shi)，頂(ding)進操作(zuo)應謹慎平穩勻速推進，首節管出(chu)洞(dong)(dong)口后應立即開(kai)始均勻壓注觸變泥(ni)漿。在管節出(chu)洞(dong)(dong)10～20m范圍內，檢(jian)查并督促施工(gong)(gong)員(yuan)將切土、出泥、頂速、土壓、軸線、標(biao)高等施工(gong)(gong)參(can)數逐(zhu)漸調整至正常狀態。