







摘 "要:高陡邊坡存在裂隙發育、風化嚴重、卸荷強烈等不良的地質現象,直接影響到高邊坡的穩定性。該文分別采用三維有限元強度折減法和二維剛體極限平衡法,對和平水庫右壩肩邊坡在開挖支護后的穩定性進行分析。研究結果表明,和平水庫右壩肩邊坡在完建工況下的穩定性滿足規范要求,開挖和支護措施合理可行。
關鍵詞:高邊坡;工程地質;穩定性;強度折減法;剛體極限平衡法
中圖分類號:TV223 " " "文獻標志碼:A " " " " "文章編號:2095-2945(2024)20-0115-04
Abstract: There are some bad geological phenomena in high and steep slope, such as crack development, serious weathering, strong unloading and so on, which directly affect the stability of high slope. In this paper, the three-dimensional finite element numerical strength reduction method and the two-dimensional rigid body limit equilibrium method are used to analyze the stability of the right abutment slope of Heping Reservoir after excavation and support. The results show that the stability of the right abutment slope of Heping Reservoir meets the requirements of the code, and the excavation and support measures are reasonable and feasible.
Keywords: high slope; engineering geology; stability; strength reduction method; rigid body limit equilibrium method
西南地區的大壩工程多位于高山峽谷地段,兩岸的高陡邊坡存在裂隙發育、風化嚴重、卸荷強烈等不良的地質條件,在人為開挖擾動的情況下,極易發生邊坡失穩現象。因此,不少學者就高邊坡在開挖過程中的穩定性開展了大量的研究。郭子鈺等[1]采用極限平衡法與有限元法模擬了受弱層影響下的邊坡穩定性,探討了多種評判指標,綜合描述了邊坡的穩定狀態;陳紅如等[2]采用基于連續介質理論和顯式有限差分法的Flac3D軟件,分析某邊坡在4種不同工況下的變形受力特征和破壞區分布規律,并分別采用強度折減法和摩根斯坦-普萊斯法計算邊坡安全系數;廖贊[3]基于極限平衡法和離散元法,分析了某大型水電站壩址區右岸邊坡的危險滑動面及其穩定性;謝璇等[4]基于Flac3D軟件對某碼頭設計邊坡進行開挖模擬,分析了邊坡的應力場和位移場狀態,并用強度折減的方法對開挖后的各級邊坡進行安全系數的求解;……