加筋陡边坡应力与变形特性分析

Analysis of Stress and Deformation Characteristics of Reinforced Steep Slopes

摘要:

为了深入探讨高强土工布在高填方陡坡中的加固效果,通过模型试验,将高强土工布与普通土工布、土工格栅等不同土工合成材料进行对比分析。结果表明,与普通土工布、土工格栅加筋坡体相比,高强土工布加筋陡坡在减小坡体沉降、侧向位移以及竖向附加应力方面效果较好。同时研究了高强土工布不同铺设方式对坡体竖向附加应力和变形特性的影响,结果表明,改变高强土工布的铺设方式可以增强黄土高填方陡坡的安全性和稳定性。在5种不同铺设方式中,采用向下挖两道凹槽后铺设土工布的加筋铺设方式(凹×2)能有效减小加筋陡坡坡顶沉降和竖向附加应力。研究结果可为高强土工布加筋陡边坡应用提供参考。

Abstract:

To further investigate the reinforcement effects of high-strength geotextiles in high-fill steep slopes, model tests were conducted to compare high-strength geotextiles with other different geosynthetic materials including common geotextiles and geogrids. The results indicated that high-strength geotextile-reinforced steep slopes showed better performance in reducing slope body settlement, lateral displacement, and additional vertical stress compared with those reinforced with common geotextiles and geogrids. At the same time, the influence of different laying methods of high-strength geotextile on the stress and deformation characteristics of the slope body was studied. The results showed that changing the laying methods of high-strength geotextiles could enhance the safety and stability of high-fill loess steep slopes. Among the five different laying methods, the reinforced laying method of digging two grooves downwards and laying geotextiles (concave×2) can effectively reduce the crest settlement and additional vertical stress of the reinforced steep slopes. The research results can provide a reference for the engineering application of high-strength geotextile-reinforced steep slopes.