文章來源：中國(guo)葛洲壩(ba)集團公司 發布時(shi)間：2011-03-17
3月9日，由葛洲壩集團一公司承建的尼泊爾查莫里亞水電站工程調壓井開挖完畢，引水隧洞3號支洞下游面全斷面貫通，即將進入水平調壓室860米高程以下掃尾施工階段。
查莫里亞水電站位于尼泊爾西部喜馬拉雅山地區的查莫里亞河上，靠近中尼邊境的西藏地區，設計壩高和壩長分別為54m和88m，總裝機容量為3萬KW，由尼泊爾政府投資興建。建成后將解決尼泊爾西部邊遠地區供電緊張狀況，同時可向印度國家電網供應電力，促進當地社會經濟發展。
調(diao)(diao)壓(ya)(ya)(ya)(ya)(ya)井(jing)系統由(you)水(shui)平調(diao)(diao)壓(ya)(ya)(ya)(ya)(ya)室(shi)和調(diao)(diao)壓(ya)(ya)(ya)(ya)(ya)井(jing)兩部(bu)分組成，其中調(diao)(diao)壓(ya)(ya)(ya)(ya)(ya)井(jing)高(gao)(gao)度(du)為(wei)49.17米，開挖(wa)洞(dong)型(xing)為(wei)圓形，襯(chen)砌(qi)前洞(dong)徑(jing)斷(duan)面(mian)直(zhi)徑(jing)為(wei)4.6米。此次完工(gong)(gong)的項目(mu)主要(yao)是調(diao)(diao)壓(ya)(ya)(ya)(ya)(ya)井(jing)和水(shui)平調(diao)(diao)壓(ya)(ya)(ya)(ya)(ya)室(shi)860米高(gao)(gao)程以上大部(bu)分施(shi)(shi)工(gong)(gong)項目(mu)。由(you)于調(diao)(diao)壓(ya)(ya)(ya)(ya)(ya)井(jing)施(shi)(shi)工(gong)(gong)部(bu)位(wei)巖石極為(wei)軟(ruan)弱破碎(sui)，且(qie)開挖(wa)垂直(zhi)高(gao)(gao)度(du)大，若按(an)原設計(ji)方(fang)(fang)案(an)，不僅(jin)施(shi)(shi)工(gong)(gong)難度(du)大，進(jin)度(du)緩慢(man)，且(qie)存在(zai)安全(quan)隱(yin)患。為(wei)化解現有(you)施(shi)(shi)工(gong)(gong)矛(mao)盾，項目(mu)部(bu)通過(guo)反復研究，決定采(cai)(cai)用(yong)從引水(shui)隧3號支(zhi)洞(dong)下(xia)游面(mian)進(jin)行(xing)水(shui)平調(diao)(diao)壓(ya)(ya)(ya)(ya)(ya)室(shi)860米高(gao)(gao)程以上開挖(wa)，從通風洞(dong)進(jin)行(xing)調(diao)(diao)壓(ya)(ya)(ya)(ya)(ya)井(jing)907.4米高(gao)(gao)程以上開挖(wa)，對調(diao)(diao)壓(ya)(ya)(ya)(ya)(ya)井(jing)垂直(zhi)段采(cai)(cai)用(yong)地質(zhi)鉆機鉆孔和平行(xing)直(zhi)眼掏槽布孔方(fang)(fang)式，自下(xia)而上分段深孔爆(bao)破施(shi)(shi)工(gong)(gong)導(dao)井(jing)，再擴挖(wa)成型(xing)的施(shi)(shi)工(gong)(gong)方(fang)(fang)案(an)。施(shi)(shi)工(gong)(gong)中，葛洲(zhou)壩人精(jing)心組織(zhi)，嚴格管(guan)理，確保(bao)了工(gong)(gong)程建設順利推進(jin)。