水(shui)(shui)下封(feng)(feng)堵(du)(du)(du)無(wu)流水(shui)(shui)，管(guan)路上游無(wu)流水(shui)(shui)，堵(du)(du)(du)漏后水(shui)(shui)位線不會(hui)改(gai)變。水(shui)(shui)下封(feng)(feng)堵(du)(du)(du)可(ke)采用氣(qi)囊(nang)封(feng)(feng)堵(du)(du)(du)，工(gong)(gong)程(cheng)(cheng)(cheng)施工(gong)(gong)速度(du)更快，堵(du)(du)(du)漏后反映快，水(shui)(shui)下封(feng)(feng)堵(du)(du)(du)便(bian)捷。提議在5鐘(zhong)頭內采用臨時(shi)性(xing)水(shui)(shui)下封(feng)(feng)堵(du)(du)(du)。水(shui)(shui)下封(feng)(feng)堵(du)(du)(du)上下游有來水(shui)(shui)，堵(du)(du)(du)漏后水(shui)(shui)位線會(hui)持(chi)續增長(chang)，管(guan)道封(feng)(feng)堵(du)(du)(du)的工(gong)(gong)作年限較長(chang)，可(ke)采用水(shui)(shui)中造墻堵(du)(du)(du)漏。其工(gong)(gong)程(cheng)(cheng)(cheng)施工(gong)(gong)特性(xing)是工(gong)(gong)程(cheng)(cheng)(cheng)施工(gong)(gong)周期比氣(qi)囊(nang)封(feng)(feng)堵(du)(du)(du)長(chang)，必須(xu)12小時(shi)的干(gan)固時(shi)間，拆卸必須(xu)水(shui)(shui)中粉碎，具有水(shui)(shui)下封(feng)(feng)堵(du)(du)(du)可(ke)性(xing)高的優勢。

1、管(guan)塞封堵法

管(guan)(guan)(guan)塞(sai)(sai)封堵(du)法常用于小型管(guan)(guan)(guan)道(dao)中(zhong)，一般管(guan)(guan)(guan)塞(sai)(sai)有橡(xiang)(xiang)膠塞(sai)(sai)(兩塊(kuai)鐵(tie)板中(zhong)間(jian)嵌裝(zhuang)厚(hou)橡(xiang)(xiang)膠圈(quan)，鐵(tie)板用螺栓絞緊(jin)，使橡(xiang)(xiang)膠圈(quan)擴張與管(guan)(guan)(guan)壁(bi)產生摩擦，以達到穩定管(guan)(guan)(guan)塞(sai)(sai)的(de)作(zuo)用)、木質管(guan)(guan)(guan)塞(sai)(sai)(外(wai)包麻布等塞(sai)(sai)入管(guan)(guan)(guan)口并塞(sai)(sai)緊(jin))。另外(wai)，也可用透水性小的(de)黏土(tu)裝(zhuang)袋，然(ran)后塞(sai)(sai)入溝管(guan)(guan)(guan)塞(sai)(sai)緊(jin)等。

2、磚砌封堵法

用水(shui)泥砂漿或(huo)水(shui)泥黏土拌(ban)制的膠(jiao)結材料，砌筑磚墻來封堵大、中型管道(dao)，是(shi)較常用的方法。它具有取(qu)料方便，封堵效(xiao)果較好的優點，缺(que)點是(shi)拆(chai)除比較困難(nan)。