橋式濾水(shui)(shui)管主要(yao)(yao)(yao)從事的(de)工(gong)(gong)作之(zhi)一(yi)就是降(jiang)(jiang)(jiang)(jiang)(jiang)水(shui)(shui)工(gong)(gong)作，譬(pi)如說水(shui)(shui)庫降(jiang)(jiang)(jiang)(jiang)(jiang)水(shui)(shui)、地(di)(di)鐵降(jiang)(jiang)(jiang)(jiang)(jiang)水(shui)(shui)的(de)工(gong)(gong)程(cheng)施(shi)工(gong)(gong)中去。地(di)(di)鐵位于地(di)(di)下，因此(ci)(ci)降(jiang)(jiang)(jiang)(jiang)(jiang)水(shui)(shui)工(gong)(gong)作十分重要(yao)(yao)(yao)。地(di)(di)鐵的(de)建設(she)過(guo)程(cheng)中，由于是在地(di)(di)下施(shi)工(gong)(gong)，都(dou)是將地(di)(di)鐵鐵軌(gui)埋在地(di)(di)下水(shui)(shui)水(shui)(shui)位以(yi)下的(de)位置(zhi)，因此(ci)(ci)如果(guo)降(jiang)(jiang)(jiang)(jiang)(jiang)水(shui)(shui)工(gong)(gong)作做不好，那么就很(hen)難施(shi)工(gong)(gong)建設(she)，并且降(jiang)(jiang)(jiang)(jiang)(jiang)水(shui)(shui)工(gong)(gong)作的(de)效果(guo)直接(jie)影(ying)(ying)響工(gong)(gong)程(cheng)的(de)。在地(di)(di)鐵建設(she)過(guo)程(cheng)中往往都(dou)會需要(yao)(yao)(yao)做降(jiang)(jiang)(jiang)(jiang)(jiang)水(shui)(shui)降(jiang)(jiang)(jiang)(jiang)(jiang)壓的(de)工(gong)(gong)作，而這兩(liang)項工(gong)(gong)作都(dou)要(yao)(yao)(yao)用到橋式濾水(shui)(shui)管。一(yi)般地(di)(di)鐵站(zhan)的(de)降(jiang)(jiang)(jiang)(jiang)(jiang)壓井(jing)和(he)降(jiang)(jiang)(jiang)(jiang)(jiang)水(shui)(shui)井(jing)都(dou)是都(dou)是布置(zhi)在坑基的(de)兩(liang)側，但是位置(zhi)可以(yi)使不固定的(de)要(yao)(yao)(yao)因地(di)(di)制宜，盡可能不要(yao)(yao)(yao)影(ying)(ying)響降(jiang)(jiang)(jiang)(jiang)(jiang)水(shui)(shui)井(jing)工(gong)(gong)作性能的(de)發(fa)揮(hui)。在施(shi)工(gong)(gong)的(de)過(guo)程(cheng)中不要(yao)(yao)(yao)碰擊和(he)截割井(jing)管，井(jing)管有(you)很(hen)嚴格(ge)的(de)保護(hu)要(yao)(yao)(yao)求(qiu)。井(jing)口要(yao)(yao)(yao)高于地(di)(di)面0.5米(mi)，防止地表(biao)水(shui)(shui)(shui)滲(shen)入井(jing)管(guan)(guan)。井(jing)管(guan)(guan)中要(yao)(yao)用到(dao)橋式(shi)濾水(shui)(shui)(shui)管(guan)(guan)，并且在(zai)橋式(shi)濾水(shui)(shui)(shui)管(guan)(guan)外面裹(guo)一(yi)層尼龍繩，橋式(shi)濾水(shui)(shui)(shui)管(guan)(guan)的直(zhi)(zhi)徑與要(yao)(yao)與井(jing)管(guan)(guan)壁的直(zhi)(zhi)徑相同(tong)，橋式(shi)濾水(shui)(shui)(shui)管(guan)(guan)只要(yao)(yao)布(bu)置在(zai)微承(cheng)壓(ya)含水(shui)(shui)(shui)層和承(cheng)壓(ya)含水(shui)(shui)(shui)層中。

橋(qiao)式濾(lv)水(shui)管水(shui)工建(jian)筑物工程施(shi)工時(shi)，根據地質情況，在(zai)地下水(shui)位高的地方進行(xing)(xing)深層地基挖掘工程會滲(shen)出大(da)量地下水(shui)。為(wei)了解決地基浸水(shui)問題，多采(cai)用井(jing)(jing)點降(jiang)水(shui)和管井(jing)(jing)降(jiang)水(shui)，這兩種降(jiang)水(shui)方法采(cai)用上直井(jing)(jing)管進行(xing)(xing)降(jiang)水(shui)，地下為(wei)均(jun)質土壤，雖有有改變(bian)，但當地下出現不透(tou)水(shui)層或表面(mian)浸水(shui)地質(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。