橋式濾水管也被稱為(wei)“理想的(de)水(shui)(shui)(shui)井(jing)過濾(lv)(lv)器”。橋式濾(lv)(lv)水(shui)(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)是(shi)一種應(ying)用(yong)(yong)于(yu)水(shui)(shui)(shui)井(jing)中(zhong)的(de)濾(lv)(lv)水(shui)(shui)(shui)設(she)備，水(shui)(shui)(shui)井(jing)或者是(shi)管(guan)(guan)(guan)(guan)(guan)(guan)井(jing)是(shi)由(you)井(jing)室，井(jing)壁管(guan)(guan)(guan)(guan)(guan)(guan)，沉淀(dian)(dian)管(guan)(guan)(guan)(guan)(guan)(guan)，濾(lv)(lv)水(shui)(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)四個部分(fen)組成(cheng)(cheng)，而濾(lv)(lv)水(shui)(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)是(shi)重要(yao)的(de)組成(cheng)(cheng)部分(fen)，處在(zai)含水(shui)(shui)(shui)層的(de)位置，上接井(jing)壁管(guan)(guan)(guan)(guan)(guan)(guan)下聯沉淀(dian)(dian)管(guan)(guan)(guan)(guan)(guan)(guan)。橋式濾(lv)(lv)水(shui)(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)主要(yao)作(zuo)用(yong)(yong)是(shi)護壁，濾(lv)(lv)水(shui)(shui)(shui)，阻砂(sha)。橋式濾(lv)(lv)水(shui)(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)由(you)于(yu)其特殊(shu)的(de)孔型(xing)結構，被廣大的(de)施工工程所接受(shou)，但是(shi)使用(yong)(yong)濾(lv)(lv)水(shui)(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)成(cheng)(cheng)井(jing)效果的(de)好壞。從(cong)而起(qi)到保護井(jing)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)作(zuo)用(yong)(yong)基坑(keng)過濾(lv)(lv)管(guan)(guan)(guan)(guan)(guan)(guan)159mm\168mm\180mm\194mm一根價格(ge)水(shui)(shui)流阻力取(qu)決于下(xia)管(guan)(guan)前后的(de)換漿(jiang)工(gong)(gong)作(zuo)和(he)洗井(jing)的(de)步(bu)驟和(he)方法，在下(xia)管(guan)(guan)工(gong)(gong)作(zuo)中(zhong)(zhong)，井(jing)管(guan)(guan)下(xia)入后不(bu)能馬上止水(shui)(shui)，將鉆桿(gan)下(xia)至井(jing)底，然后封(feng)閉井(jing)口，往(wang)井(jing)地(di)(di)注(zhu)入清水(shui)(shui)，使井(jing)管(guan)(guan)中(zhong)(zhong)的(de)泥漿(jiang)或沿粉從井(jing)壁外的(de)環狀(zhuang)間隙中(zhong)(zhong)頂出地(di)(di)面，當(dang)頂出的(de)水(shui)(shui)變成(cheng)清水(shui)(shui)后即可。使用(yong)濾水(shui)(shui)管(guan)(guan)能夠節(jie)省洗井(jing)的(de)時(shi)間。

橋式濾(lv)水(shui)(shui)管(guan)水(shui)(shui)工(gong)建(jian)筑(zhu)物工(gong)程施工(gong)時，根據地(di)(di)(di)(di)(di)質(zhi)情(qing)況(kuang)，在地(di)(di)(di)(di)(di)下水(shui)(shui)位高的地(di)(di)(di)(di)(di)方進(jin)行深層地(di)(di)(di)(di)(di)基(ji)(ji)挖掘工(gong)程會滲出大(da)量地(di)(di)(di)(di)(di)下水(shui)(shui)。為(wei)了(le)解(jie)決(jue)地(di)(di)(di)(di)(di)基(ji)(ji)浸(jin)水(shui)(shui)問題，多采用井點降(jiang)水(shui)(shui)和管(guan)井降(jiang)水(shui)(shui)，這兩種降(jiang)水(shui)(shui)方法采用上直井管(guan)進(jin)行降(jiang)水(shui)(shui)，地(di)(di)(di)(di)(di)下為(wei)均質(zhi)土(tu)壤(rang)，雖(sui)有有改變，但當地(di)(di)(di)(di)(di)下出現(xian)不透水(shui)(shui)層或表(biao)面浸(jin)水(shui)(shui)地(di)(di)(di)(di)(di)質(zhi)(如粘泥層)時，井點降水和管井降水效果更明顯，水平橋式濾水管降水主要是將降水管埋在粘土夾層和側面土層中平整，很好地排除來自基坑表面的浸水和來自側面的浸水。 與井點降水法相比，將常用的垂直鋼管改為平的塑料管，在基坑內靈活靠近配置，以彌補井點降水只能在基坑周圍降水的不足，達到靈活處理基坑浸水的目的。

穿孔式橋式濾水(shui)管 穿孔式濾水(shui)(shui)管(guan)是在(zai)井(jing)管(guan)上構成(cheng)(cheng)一(yi)定幾何形(xing)狀和一(yi)定規(gui)律布置的(de)進(jin)水(shui)(shui)孔眼(yan)而成(cheng)(cheng)。這種掛水(shui)(shui)管(guan)只(zhi)能直接(jie)使用(yong)于(yu)粗砂以上的(de)含水(shui)(shui)層中。因(yin)其進(jin)水(shui)(shui)孔眼(yan)的(de)幾何形(xing)狀不同，大(da)致又可分為兩(liang)種: 圓孔(kong)式濾水(shui)(shui)管(guan)(guan)這(zhe)是歷(li)史簡(jian)單的(de)一種型(xing)式。其孔(kong)眼可(ke)(ke)很據不(bu)同(tong)管(guan)(guan)材而(er)用不(bu)同(tong)方法制成。一般對(dui)金屬管(guan)(guan)和石棉(mian)水(shui)(shui)泥管(guan)(guan)多(duo)用鉆孔(kong)或沖壓而(er)成，而(er)對(dui)混凝土(tu)管(guan)(guan)只能(neng)在澆筑成型(xing)時預(yu)留圓孔(kong)。其孔(kong)眼的(de)大小主要按含水(shui)(shui)層的(de)順(shun)粒粒徑而(er)定，進(jin)水(shui)(shui)孔(kong)眼在管(guan)(guan)壁上的(de)布(bu)置形式，通常多(duo)采用交錯(cuo)的(de)梅花形。進(jin)水(shui)(shui)孔(kong)眼的(de)相互位置，還可(ke)(ke)以分(fen)為等(deng)映三角形與(yu)等(deng)邊三角形兩種。這(zhe)樣初(chu)步選定出進(jin)水(shui)(shui)孔(kong)眼布(bu)置的(de)水(shui)(shui)平與(yu)垂直孔(kong)距后，還應按對(dui)不(bu)同(tong)管(guan)(guan)材所要求的(de)開孔(kong)率再(zai)加(jia)以調(diao)正，調(diao)整使(shi)其孔(kong)距基(ji)本為整數時以便于加(jia)工(gong)。