文章來(lai)源：中國葛洲壩(ba)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)(ya)井(jing)(jing)(jing)系統由(you)水(shui)(shui)(shui)平(ping)(ping)調(diao)(diao)(diao)壓(ya)(ya)(ya)室和(he)調(diao)(diao)(diao)壓(ya)(ya)(ya)井(jing)(jing)(jing)兩部分組成(cheng)(cheng)，其中調(diao)(diao)(diao)壓(ya)(ya)(ya)井(jing)(jing)(jing)高(gao)(gao)度(du)(du)為(wei)(wei)49.17米(mi)，開(kai)挖(wa)洞(dong)型為(wei)(wei)圓形，襯砌前洞(dong)徑斷面(mian)(mian)直徑為(wei)(wei)4.6米(mi)。此(ci)次(ci)完工(gong)(gong)的項目(mu)主(zhu)要是調(diao)(diao)(diao)壓(ya)(ya)(ya)井(jing)(jing)(jing)和(he)水(shui)(shui)(shui)平(ping)(ping)調(diao)(diao)(diao)壓(ya)(ya)(ya)室860米(mi)高(gao)(gao)程(cheng)(cheng)以上(shang)大(da)(da)(da)部分施(shi)(shi)(shi)工(gong)(gong)項目(mu)。由(you)于調(diao)(diao)(diao)壓(ya)(ya)(ya)井(jing)(jing)(jing)施(shi)(shi)(shi)工(gong)(gong)部位(wei)巖石極為(wei)(wei)軟弱破碎，且開(kai)挖(wa)垂直高(gao)(gao)度(du)(du)大(da)(da)(da)，若按原(yuan)設(she)計方案，不(bu)僅施(shi)(shi)(shi)工(gong)(gong)難(nan)度(du)(du)大(da)(da)(da)，進(jin)(jin)度(du)(du)緩慢，且存在(zai)安全(quan)隱(yin)患。為(wei)(wei)化解現有施(shi)(shi)(shi)工(gong)(gong)矛盾，項目(mu)部通(tong)過反復研究，決定采用從引水(shui)(shui)(shui)隧3號支洞(dong)下游面(mian)(mian)進(jin)(jin)行(xing)水(shui)(shui)(shui)平(ping)(ping)調(diao)(diao)(diao)壓(ya)(ya)(ya)室860米(mi)高(gao)(gao)程(cheng)(cheng)以上(shang)開(kai)挖(wa)，從通(tong)風洞(dong)進(jin)(jin)行(xing)調(diao)(diao)(diao)壓(ya)(ya)(ya)井(jing)(jing)(jing)907.4米(mi)高(gao)(gao)程(cheng)(cheng)以上(shang)開(kai)挖(wa)，對調(diao)(diao)(diao)壓(ya)(ya)(ya)井(jing)(jing)(jing)垂直段采用地質鉆(zhan)機鉆(zhan)孔和(he)平(ping)(ping)行(xing)直眼掏槽布孔方式，自(zi)下而上(shang)分段深孔爆破施(shi)(shi)(shi)工(gong)(gong)導井(jing)(jing)(jing)，再擴挖(wa)成(cheng)(cheng)型的施(shi)(shi)(shi)工(gong)(gong)方案。施(shi)(shi)(shi)工(gong)(gong)中，葛洲壩人精心(xin)組織，嚴(yan)格管(guan)理，確保了工(gong)(gong)程(cheng)(cheng)建(jian)設(she)順(shun)利(li)推進(jin)(jin)。