文章來(lai)源：中國水利水電建設集團(tuan)公司(si) 發(fa)布時間：2010-07-13
近日，中國水電基礎局有限公司在南水北調興隆項目施工中刷新了國內防滲墻施工強度最高紀錄：成槽面積36172.87平方米，成墻面積36169.17平方米，澆筑槽孔個數93個。
南水北調興隆項目是中國水電基礎局有史以來單獨承建的最大單項基礎防滲項目。工程存在著巨大的施工難題：第一、施工強度高，平均月施工強度達到15145平方米/月，最高18306平方米/月。如何做好施工組織、合理安排現場生產調度，做到防滲墻快速高效施工，是本合同段難點之一。第二， 30米厚的粉細砂地層成槽。因粉細砂具有直立性、受擾動后液化等特點，在粉細砂地層中快速建造深防滲墻是目前國內防滲墻成槽技術的難題之一。第三，承壓水地層成槽，坍塌風險大。第四，孔斜要求高。第五，強漏失地層成槽。第六，防滲墻跨汛期施工。
在實(shi)際施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)當中，基礎局興隆(long)項目(mu)部不斷改進(jin)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)藝、增加人力(li)物力(li)、引進(jin)大(da)量先(xian)進(jin)的(de)(de)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)設備和先(xian)進(jin)的(de)(de)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)技(ji)術來破解難題(ti)。采用(yong)最先(xian)進(jin)的(de)(de)防(fang)滲墻成槽(cao)設備液(ye)壓抓(zhua)(zhua)斗配合沖擊鉆機，采用(yong)“鉆抓(zhua)(zhua)法”施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)藝，快速(su)成槽(cao)；采用(yong)“接(jie)頭管法”進(jin)行墻段連接(jie)，保證接(jie)縫質(zhi)量，提高施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)效(xiao)。在提高技(ji)藝、控制質(zhi)量安全(quan)的(de)(de)同時，項目(mu)部積極開展(zhan)文(wen)明工(gong)(gong)(gong)(gong)程創建活動(dong)(dong)，開展(zhan)勞動(dong)(dong)競賽(sai)(sai)，以(yi)文(wen)明工(gong)(gong)(gong)(gong)地(di)的(de)(de)創建和勞動(dong)(dong)競賽(sai)(sai)的(de)(de)開展(zhan)促進(jin)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)生產。