电网与清洁能源
電網與清潔能源
전망여청길능원
ADVANCES OF POWER SYSTEM & HYDROELECTRIC ENGINEERING
2014年
6期
77-80
,共4页
全断面开挖%上下半洞台阶开挖%围岩稳定性分析
全斷麵開挖%上下半洞檯階開挖%圍巖穩定性分析
전단면개알%상하반동태계개알%위암은정성분석
the full-face tunneling method%the upper and lower half hole excavation%stability analysis of surrounding rock mass
水工隧洞圆形进水口方案有全断面开挖和上下半洞台阶开挖步序，根据实际工程概况、地质条件利用有限元软件建立圆形进水口段的三维非线性分析模型，对比同一支护条件下圆形进水口方案全断面开挖和上下半台阶开挖步序的分析结果，分析两种不同开挖步序下该段放空洞围岩稳定性状。得出圆形方案的最优开挖步序。
水工隧洞圓形進水口方案有全斷麵開挖和上下半洞檯階開挖步序，根據實際工程概況、地質條件利用有限元軟件建立圓形進水口段的三維非線性分析模型，對比同一支護條件下圓形進水口方案全斷麵開挖和上下半檯階開挖步序的分析結果，分析兩種不同開挖步序下該段放空洞圍巖穩定性狀。得齣圓形方案的最優開挖步序。
수공수동원형진수구방안유전단면개알화상하반동태계개알보서，근거실제공정개황、지질조건이용유한원연건건립원형진수구단적삼유비선성분석모형，대비동일지호조건하원형진수구방안전단면개알화상하반태계개알보서적분석결과，분석량충불동개알보서하해단방공동위암은정성상。득출원형방안적최우개알보서。
There are two excavation approaches for the cir-cular tunnel of the water inlet,namely the full-face tunneling method and the upper and lower half hole step excavation method. According to the actual engineering situation and geological conditions, this paper uses the finite elements software to establish the three-dimensional nonlinear analysis model for the circular water inlet,and compares the results of the full-face tunneling method and the upper and lower half hole step excavation method under the same supporting conditions,and analyzes the stability of the surrounding rock mass of the two different excavation sequences. Finally the best excavation sequence for the project of the circular tunnel of the water inlet is obtained.
