1）下(xia)(xia)橋(qiao)式濾(lv)(lv)水(shui)(shui)(shui)(shui)管(guan)前稀釋泥(ni)漿，使比重不(bu)(bu)大于1.2T/M3，防止(zhi)(zhi)阻(zu)塞橋(qiao)濾(lv)(lv)管(guan)的縫(feng)隙(xi)，而使濾(lv)(lv)水(shui)(shui)(shui)(shui)管(guan)表里(li)構成(cheng)較(jiao)大的壓力差，在這種(zhong)狀(zhuang)況(kuang)下(xia)(xia)，濾(lv)(lv)水(shui)(shui)(shui)(shui)管(guan)就有(you)變形(xing)(xing)的可(ke)能(neng)(neng)(neng)。現場(chang)運用(yong)包扎(zha)棕皮、尼龍網更易(yi)產生這種(zhong)狀(zhuang)況(kuang)。所以運用(yong)中(zhong)要(yao)(yao)特別注(zhu)(zhu)意防止(zhi)(zhi)濾(lv)(lv)水(shui)(shui)(shui)(shui)管(guan)表里(li)構成(cheng)較(jiao)大的壓力差，下(xia)(xia)橋(qiao)式濾(lv)(lv)水(shui)(shui)(shui)(shui)管(guan)操作要(yao)(yao)平穩：若管(guan)遇阻(zu)時，要(yao)(yao)人力改變相關的角度(du)再(zai)下(xia)(xia)，一起查看濾(lv)(lv)水(shui)(shui)(shui)(shui)管(guan)是否因為(wei)(wei)受阻(zu)而變形(xing)(xing)，若因受阻(zu)不(bu)(bu)能(neng)(neng)(neng)下(xia)(xia)入(ru)(ru)(ru)，不(bu)(bu)得強行(xing)下(xia)(xia)管(guan)。 2）橋(qiao)式濾(lv)(lv)水(shui)(shui)(shui)(shui)管(guan)下(xia)(xia)井(jing)(jing)后(hou)(hou)不(bu)(bu)能(neng)(neng)(neng)馬(ma)上止(zhi)(zhi)水(shui)(shui)(shui)(shui)，還需要(yao)(yao)將鉆桿(gan)下(xia)(xia)至孔底，然后(hou)(hou)才能(neng)(neng)(neng)封閉井(jing)(jing)口(kou)，再(zai)利(li)用(yong)泥(ni)漿泵(beng)(beng)通過鉆桿(gan)將清水(shui)(shui)(shui)(shui)送入(ru)(ru)(ru)井(jing)(jing)內(nei)(nei)，使橋(qiao)式濾(lv)(lv)水(shui)(shui)(shui)(shui)管(guan)內(nei)(nei)外的泥(ni)漿或巖粉從井(jing)(jing)壁外的環(huan)狀(zhuang)間隙(xi)中(zhong)頂(ding)出地面，（井(jing)(jing)點降水(shui)(shui)(shui)(shui)）直到返清水(shui)(shui)(shui)(shui)為(wei)(wei)止(zhi)(zhi)，但是需要(yao)(yao)算計注(zhu)(zhu)入(ru)(ru)(ru)的水(shui)(shui)(shui)(shui)量；在孔內(nei)(nei)返清水(shui)(shui)(shui)(shui)之后(hou)(hou)，可(ke)以注(zhu)(zhu)入(ru)(ru)(ru)合適量的化學洗(xi)井(jing)(jing)劑，有(you)利(li)于加快洗(xi)井(jing)(jing)速度(du)、縮短(duan)洗(xi)井(jing)(jing)的時間。 3）止(zhi)(zhi)水(shui)(shui)(shui)(shui)時需要(yao)(yao)往里(li)投(tou)入(ru)(ru)(ru)粘土(tu)球(qiu)進行(xing)止(zhi)(zhi)水(shui)(shui)(shui)(shui)，注(zhu)(zhu)意控制黏土(tu)球(qiu)投(tou)入(ru)(ru)(ru)的量，止(zhi)(zhi)水(shui)(shui)(shui)(shui)厚(hou)度(du)一般不(bu)(bu)小于20m，當(dang)粘土(tu)球(qiu)投(tou)完后(hou)(hou)再(zai)投(tou)入(ru)(ru)(ru)10~20m，直徑10~20mm的石(shi)子將粘土(tu)球(qiu)壓實增強止(zhi)(zhi)水(shui)(shui)(shui)(shui)效(xiao)果，止(zhi)(zhi)水(shui)(shui)(shui)(shui)完成(cheng)后(hou)(hou)，使用(yong)壓風機(ji)洗(xi)井(jing)(jing)或潛(qian)水(shui)(shui)(shui)(shui)泵(beng)(beng)洗(xi)井(jing)(jing)