岩石力学与工程学报
巖石力學與工程學報
암석역학여공정학보
CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
2014年
1期
35-42
,共8页
边坡工程%坡面形态%模型试验%极限平衡%统计分析%安全系数
邊坡工程%坡麵形態%模型試驗%極限平衡%統計分析%安全繫數
변파공정%파면형태%모형시험%겁한평형%통계분석%안전계수
slope engineering%slope topography%model test%limit equilibrium%statistical analysis%safety factor
从失稳边坡资料统计分析、模型试验和理论计算3个方面，研究坡面形态对边坡稳定的影响(坡面形态效应)。通过对300个失稳边坡资料的统计分析，从宏观认识上得到凸坡的稳定性较差，而凹坡稳定性较好的初步结论。采用底抬升模型试验，研究凸坡、平坡和凹坡的极限稳定角，结果表明，凹坡的极限稳定角要比平坡的大，凸坡则比平坡小。并从理论上分析凸坡、平坡和凹坡之间的受力差异，对凹坡比凸坡更稳定的现象进行解释。采用严格极限平衡法，获得圆形凸坡和凹坡的安全系数解答，分析坡面形态效应的影响因素和变化规律，从工程应用角度制作圆形坡面形态边坡安全系数速查曲线，并建议考虑坡面形态效应的范围。研究成果可为合理评价不同坡面形态的边坡稳定性提供参考。
從失穩邊坡資料統計分析、模型試驗和理論計算3箇方麵，研究坡麵形態對邊坡穩定的影響(坡麵形態效應)。通過對300箇失穩邊坡資料的統計分析，從宏觀認識上得到凸坡的穩定性較差，而凹坡穩定性較好的初步結論。採用底抬升模型試驗，研究凸坡、平坡和凹坡的極限穩定角，結果錶明，凹坡的極限穩定角要比平坡的大，凸坡則比平坡小。併從理論上分析凸坡、平坡和凹坡之間的受力差異，對凹坡比凸坡更穩定的現象進行解釋。採用嚴格極限平衡法，穫得圓形凸坡和凹坡的安全繫數解答，分析坡麵形態效應的影響因素和變化規律，從工程應用角度製作圓形坡麵形態邊坡安全繫數速查麯線，併建議攷慮坡麵形態效應的範圍。研究成果可為閤理評價不同坡麵形態的邊坡穩定性提供參攷。
종실은변파자료통계분석、모형시험화이론계산3개방면，연구파면형태대변파은정적영향(파면형태효응)。통과대300개실은변파자료적통계분석，종굉관인식상득도철파적은정성교차，이요파은정성교호적초보결론。채용저태승모형시험，연구철파、평파화요파적겁한은정각，결과표명，요파적겁한은정각요비평파적대，철파칙비평파소。병종이론상분석철파、평파화요파지간적수력차이，대요파비철파경은정적현상진행해석。채용엄격겁한평형법，획득원형철파화요파적안전계수해답，분석파면형태효응적영향인소화변화규률，종공정응용각도제작원형파면형태변파안전계수속사곡선，병건의고필파면형태효응적범위。연구성과가위합리평개불동파면형태적변파은정성제공삼고。
The effect of slope topography on the stability is studied by statistical analysis,experimental tests and theoretical calculation. Firstly,a preliminary result that the stability of concave slope is better than that of convex slope is obtained based on the statistical analysis of 300 sets of failure slope data. Then,the ultimate stable angles of concave slope,convex slope and horizontal slope are researched by tilting the model box test. The results indicate that the ultimate stable angle of concave slope is higher than that of horizontal slope,and the convex slope′s ultimate stable angle is lower than the horizontal slope′s one. Thereafter,the force differences among convex slope,concave slope and horizontal slope are analyzed theoretically;and the phenomenon that the concave slope is more stable than the convex slope is explained. Finally,the safety factors of circular concave and convex slopes are derived employing rigorous limit equilibrium method. The influence factors and changing rules of slope topography effect are also analyzed. The safety factor curves of circular slopes with different curvatures are designed to facilitate engineering applications. Then,the ranges of considering slope topography effect are also suggested. The results provide some scientific references to accurately evaluate slope stability of diverse topography.
