文章來源：中國葛洲壩集團公(gong)司 發布時間：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)(diao)壓(ya)(ya)井(jing)系統(tong)由水平(ping)(ping)調(diao)(diao)(diao)壓(ya)(ya)室和調(diao)(diao)(diao)壓(ya)(ya)井(jing)兩部(bu)(bu)分組成，其(qi)中調(diao)(diao)(diao)壓(ya)(ya)井(jing)高(gao)(gao)度(du)為(wei)(wei)49.17米(mi)(mi)，開挖洞型(xing)為(wei)(wei)圓形，襯砌前(qian)洞徑(jing)(jing)斷面(mian)直(zhi)徑(jing)(jing)為(wei)(wei)4.6米(mi)(mi)。此次完(wan)工(gong)(gong)的項(xiang)目主要是(shi)調(diao)(diao)(diao)壓(ya)(ya)井(jing)和水平(ping)(ping)調(diao)(diao)(diao)壓(ya)(ya)室860米(mi)(mi)高(gao)(gao)程(cheng)以上大部(bu)(bu)分施(shi)(shi)工(gong)(gong)項(xiang)目。由于調(diao)(diao)(diao)壓(ya)(ya)井(jing)施(shi)(shi)工(gong)(gong)部(bu)(bu)位巖石極為(wei)(wei)軟(ruan)弱破碎，且開挖垂直(zhi)高(gao)(gao)度(du)大，若按原設計(ji)方(fang)案，不(bu)僅施(shi)(shi)工(gong)(gong)難(nan)度(du)大，進度(du)緩(huan)慢，且存(cun)在安全隱患。為(wei)(wei)化解現有施(shi)(shi)工(gong)(gong)矛(mao)盾，項(xiang)目部(bu)(bu)通(tong)過反復研究，決定采用(yong)從(cong)引(yin)水隧3號支洞下(xia)游面(mian)進行(xing)水平(ping)(ping)調(diao)(diao)(diao)壓(ya)(ya)室860米(mi)(mi)高(gao)(gao)程(cheng)以上開挖，從(cong)通(tong)風洞進行(xing)調(diao)(diao)(diao)壓(ya)(ya)井(jing)907.4米(mi)(mi)高(gao)(gao)程(cheng)以上開挖，對調(diao)(diao)(diao)壓(ya)(ya)井(jing)垂直(zhi)段采用(yong)地質鉆(zhan)機鉆(zhan)孔和平(ping)(ping)行(xing)直(zhi)眼掏槽布孔方(fang)式，自下(xia)而上分段深孔爆破施(shi)(shi)工(gong)(gong)導井(jing)，再(zai)擴挖成型(xing)的施(shi)(shi)工(gong)(gong)方(fang)案。施(shi)(shi)工(gong)(gong)中，葛洲壩人精心組織，嚴格管理(li)，確保(bao)了工(gong)(gong)程(cheng)建設順利推進。