當基坑(keng)(keng)、基槽寬小于6m時(shi)，且降水(shui)深度(du)不超過(guo)5m時(shi)，真空井(jing)(jing)(jing)(jing)，真空井(jing)(jing)(jing)(jing)點(dian)(dian)(dian)應該(gai)按(an)(an)單排(pai)(pai)布(bu)置 。當基坑(keng)(keng)寬度(du)大于6m或土質不良，則宜采用(yong)雙排(pai)(pai)井(jing)(jing)(jing)(jing)點(dian)(dian)(dian)。如何使降水(shui)對周(zhou)圍環境的(de)(de)影(ying)響達到小成為(wei)人們關心的(de)(de)問題。針對此問題， 采用(yong)線(xian)性規劃方法對基坑(keng)(keng)工(gong)程真空井(jing)(jing)(jing)(jing)點(dian)(dian)(dian)降水(shui)井(jing)(jing)(jing)(jing)的(de)(de)優化設(she)(she)計。真空井(jing)(jing)(jing)(jing)點(dian)(dian)(dian)的(de)(de)安(an)裝程序是(shi)按(an)(an)照設(she)(she)計的(de)(de)平(ping)面布(bu)置方案，先(xian)排(pai)(pai)放總管(guan)(guan)，再埋設(she)(she)井(jing)(jing)(jing)(jing)點(dian)(dian)(dian)管(guan)(guan)，用(yong)彎(wan)聯管(guan)(guan)將井(jing)(jing)(jing)(jing)點(dian)(dian)(dian)管(guan)(guan)與總管(guan)(guan)接(jie)通，后安(an)裝抽水(shui)設(she)(she)備。

當(dang)基坑(keng)、基槽寬(kuan)小于6m時，且降水深度(du)不超過5m時，節能(neng)真(zhen)空(kong)(kong)井(jing)(jing)，真(zhen)空(kong)(kong)井(jing)(jing)點應(ying)該(gai)按單排(pai)布置 。當(dang)基坑(keng)寬(kuan)度(du)大于6m或(huo)土(tu)質不良，則宜采用雙排(pai)井(jing)(jing)點。利用自吸(xi)真(zhen)空(kong)(kong)井(jing)(jing)搞井(jing)(jing)群(qun)灌溉是淺層地下水比較豐(feng)富的地區建設早澇保收、高(gao)(gao)產穩(wen)產田的一條(tiao)新路子。自吸(xi)真(zhen)空(kong)(kong)井(jing)(jing)是真(zhen)空(kong)(kong)井(jing)(jing)的發展和(he)改進(jin)。真(zhen)空(kong)(kong)井(jing)(jing) 節省了(le)天(tian)天(tian)去(qu)公共井(jing)(jing)擔水的時間和(he)所付(fu)出(chu)的體力勞(lao)動量(liang).增(zeng)加了(le)出(chu)水的量(liang)，提(ti)高(gao)(gao)了(le)動水位，真(zhen)空(kong)(kong)井(jing)(jing)廠家，縮短了(le)水泵吸(xi)水揚程(cheng)，提(ti)高(gao)(gao)裝置效率。

真(zhen)空(kong)(kong)(kong)井(jing)(jing)(jing)(jing)(jing)亦(yi)稱井(jing)(jing)(jing)(jing)(jing)泵對口抽。把井(jing)(jing)(jing)(jing)(jing)管與(yu)水(shui)(shui)(shui)泵吸水(shui)(shui)(shui)管連接(jie)并密封(feng)成(cheng)整體的(de)(de)管井(jing)(jing)(jing)(jing)(jing)。當(dang)水(shui)(shui)(shui)泵開(kai)動后，真(zhen)空(kong)(kong)(kong)井(jing)(jing)(jing)(jing)(jing)生產(chan)廠家(jia)，井(jing)(jing)(jing)(jing)(jing)內(nei)形(xing)成(cheng)真(zhen)空(kong)(kong)(kong)，用(yong)(yong)壓(ya)水(shui)(shui)(shui)機或離心泵把水(shui)(shui)(shui)抽上(shang)來使(shi)用(yong)(yong)。利用(yong)(yong)自吸真(zhen)空(kong)(kong)(kong)井(jing)(jing)(jing)(jing)(jing)搞井(jing)(jing)(jing)(jing)(jing)群灌溉是(shi)淺層地(di)下水(shui)(shui)(shui)比(bi)較豐(feng)富的(de)(de)地(di)區建設早澇保收、高產(chan)穩產(chan)田的(de)(de)一條新路子。自吸真(zhen)空(kong)(kong)(kong)井(jing)(jing)(jing)(jing)(jing)是(shi)真(zhen)空(kong)(kong)(kong)井(jing)(jing)(jing)(jing)(jing)的(de)(de)發(fa)展和改進。真(zhen)空(kong)(kong)(kong)井(jing)(jing)(jing)(jing)(jing)點降水(shui)(shui)(shui)原理通過總(zong)管利用(yong)(yong)抽水(shui)(shui)(shui)設備將地(di)下水(shui)(shui)(shui)從井(jing)(jing)(jing)(jing)(jing)管內(nei)不斷抽出，使(shi)原有地(di)下水(shui)(shui)(shui)位降低。當(dang)基坑面積較大時，宜采用(yong)(yong)環形(xing)井(jing)(jing)(jing)(jing)(jing)點。