人民黄河
人民黃河
인민황하
Yellow River
2014年
12期
94-96
,共3页
隧洞钢衬%许用应力%美国标准%中国标准%抗外压稳定%设计%厄瓜多尔CCS水电站
隧洞鋼襯%許用應力%美國標準%中國標準%抗外壓穩定%設計%阨瓜多爾CCS水電站
수동강츤%허용응력%미국표준%중국표준%항외압은정%설계%액과다이CCS수전참
steel lining%allowable stress%American standards%Chinese standards%stability against external pressure%design%Ecuador CCS Hy-dropower Station
根据厄瓜多尔CCS水电站实际情况、合同及美国标准的规定，确定了钢衬材料的机械性能及许用应力，对钢衬抗外压稳定进行了计算分析，修正了美国标准中加劲环自身抗外压稳定计算公式，并且对美国标准与中国标准计算结果进行了对比。结果表明：随着加劲环间距的增大，中国标准得到的加劲环自身抗外压稳定计算值偏小。鉴于外水压力值超过了2．0 MPa，且钢筋混凝土衬砌段为透水设计，虽然按美国标准复核抗外压稳定满足要求，但是考虑工程安全起见，采取在压力钢管上部30 m处设排水洞。
根據阨瓜多爾CCS水電站實際情況、閤同及美國標準的規定，確定瞭鋼襯材料的機械性能及許用應力，對鋼襯抗外壓穩定進行瞭計算分析，脩正瞭美國標準中加勁環自身抗外壓穩定計算公式，併且對美國標準與中國標準計算結果進行瞭對比。結果錶明：隨著加勁環間距的增大，中國標準得到的加勁環自身抗外壓穩定計算值偏小。鑒于外水壓力值超過瞭2．0 MPa，且鋼觔混凝土襯砌段為透水設計，雖然按美國標準複覈抗外壓穩定滿足要求，但是攷慮工程安全起見，採取在壓力鋼管上部30 m處設排水洞。
근거액과다이CCS수전참실제정황、합동급미국표준적규정，학정료강츤재료적궤계성능급허용응력，대강츤항외압은정진행료계산분석，수정료미국표준중가경배자신항외압은정계산공식，병차대미국표준여중국표준계산결과진행료대비。결과표명：수착가경배간거적증대，중국표준득도적가경배자신항외압은정계산치편소。감우외수압력치초과료2．0 MPa，차강근혼응토츤체단위투수설계，수연안미국표준복핵항외압은정만족요구，단시고필공정안전기견，채취재압력강관상부30 m처설배수동。
Applying American standards,this paper determined the mechanical performance and allowable stress of lining material of the subject project,calculated the lining stability against external pressure,modified the calculation formula of stability against external pressure for stiffener ring in American standards,and compared the calculation results applying American standards and Chinese standards. As spacing between stiffener rings increases,the stability value of ring against external pressure applying Chinese standards is smaller than that of American standards. Although the stability is qualified according to American standards,a drainage tunnel is provided 30 m above the penstock for safety reasons,as the external water pressure is over 2. 0 MPa and the reinfored concrete-lined section is pervious.
