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一般主(zhu)要(yao)用(yong)(yong)于水(shui)(shui)(shui)工(gong)(gong)建(jian)筑中，除(chu)作(zuo)(zuo)(zuo)為正式(shi)建(jian)筑物的一部分(fen)(fen)外，圍(wei)堰(yan)一般在用(yong)(yong)完后需水(shui)(shui)(shui)下切(qie)(qie)(qie)(qie)拆除(chu)。進(jin)(jin)行(xing)鋼(gang)圍(wei)堰(yan)切(qie)(qie)(qie)(qie)割(ge)具(ju)體(ti)的操(cao)(cao)作(zuo)(zuo)(zuo)流程(cheng)：在進(jin)(jin)行(xing)鋼(gang)圍(wei)堰(yan)切(qie)(qie)(qie)(qie)割(ge)時首先選擇枯水(shui)(shui)(shui)季節操(cao)(cao)作(zuo)(zuo)(zuo)，操(cao)(cao)作(zuo)(zuo)(zuo)人員穿救生衣。潛(qian)(qian)水(shui)(shui)(shui)員下水(shui)(shui)(shui)切(qie)(qie)(qie)(qie)割(ge)時，應嚴(yan)格按照潛(qian)(qian)水(shui)(shui)(shui)員水(shui)(shui)(shui)下作(zuo)(zuo)(zuo)業操(cao)(cao)作(zuo)(zuo)(zuo)規程(cheng)作(zuo)(zuo)(zuo)業。水(shui)(shui)(shui)下切(qie)(qie)(qie)(qie)割(ge)時，應從(cong)(cong)左(zuo)(zuo)半(ban)(ban)(ban)(ban)(ban)輻(fu)下游(you)中線處(chu)開(kai)始(shi)，分(fen)(fen)塊(kuai)從(cong)(cong)上(shang)(shang)至(zhi)下水(shui)(shui)(shui)線上(shang)(shang)梯形切(qie)(qie)(qie)(qie)割(ge)，至(zhi)上(shang)(shang)游(you)中線，每塊(kuai)切(qie)(qie)(qie)(qie)割(ge)時，先割(ge)開(kai)一個吊孔，用(yong)(yong)鉤頭鋼(gang)絲扣頭將(jiang)其栓住，先切(qie)(qie)(qie)(qie)割(ge)雙壁(bi)圍(wei)堰(yan)里面反(fan)撐(cheng)，再從(cong)(cong)里到(dao)外進(jin)(jin)行(xing)切(qie)(qie)(qie)(qie)割(ge)，割(ge)開(kai)后，由起重工(gong)(gong)指揮吊至(zhi)駁(bo)(bo)船上(shang)(shang)，右半(ban)(ban)(ban)(ban)(ban)輻(fu)也按此順序切(qie)(qie)(qie)(qie)割(ge)。將(jiang)圍(wei)堰(yan)按水(shui)(shui)(shui)流軸線分(fen)(fen)成左(zuo)(zuo)右兩(liang)個半(ban)(ban)(ban)(ban)(ban)輻(fu)，浮吊和作(zuo)(zuo)(zuo)業船頂流靠泊(bo)在圍(wei)堰(yan)左(zuo)(zuo)半(ban)(ban)(ban)(ban)(ban)輻(fu)側。潛(qian)(qian)水(shui)(shui)(shui)人員持證潛(qian)(qian)水(shui)(shui)(shui)證上(shang)(shang)崗。在割(ge)至(zhi)水(shui)(shui)(shui)線以上(shang)(shang)時，將(jiang)圍(wei)堰(yan)內水(shui)(shui)(shui)抽至(zhi)標高以下20公(gong)分(fen)(fen)處(chu)。首先從(cong)(cong)左(zuo)(zuo)半(ban)(ban)(ban)(ban)(ban)輻(fu)下游(you)水(shui)(shui)(shui)軸中線處(chu)開(kai)始(shi)，分(fen)(fen)塊(kuai)切(qie)(qie)(qie)(qie)割(ge)圍(wei)堰(yan)內支撐(cheng)，和內側圍(wei)壁(bi)，半(ban)(ban)(ban)(ban)(ban)吊至(zhi)駁(bo)(bo)船上(shang)(shang)。

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