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土工合成材料加筋土挡墙具有良好的力学性能和优越的经济性等优点,在国内外得到了越来越广泛的应用。然而,众多加筋土挡墙的试验数据表明,对加筋土挡墙受力机理的理论研究是滞后于工程建设实践的。针对筋材内力计算这一重要问题,研究了面板倾角对加筋土挡墙筋材内力的影响。首先,以RMC试验挡墙为原型,验证了数值模拟方法的有效性;然后,利用数值模拟方法,分析了不同工况下,加筋土挡墙内竖向土压力和筋材应变随着面板倾角增大的变化趋势。数值模拟结果表明,筋材内力随着加筋土挡墙面板倾角的增大而降低。在数值研究结果的基础上,从潜在滑动面附近土单元应力状态及滑动楔形体的平衡两个方面分析了面板倾角的作用机理,定位了填土竖向土压力以及面板基底水平摩擦阻力两个影响筋材内力的关键因素。
Geosynthetics reinforced earth retaining wall has the advantages of good mechanical properties and superior economy, has been more widely used at home and abroad. However, the test data of many reinforced earth retaining walls shows that the theoretical study of the stress mechanism of reinforced earth retaining walls lags behind the construction practice. Aiming at the important problem of internal force calculation of reinforcement, the influence of panel inclination on internal force of reinforced earth retaining wall reinforcement was studied. First of all, the validity of the numerical simulation method is verified by using the RMC retaining wall as a prototype. Then, using numerical simulation method, the vertical earth pressure and tendon strain in the reinforced earth retaining wall are analyzed with the panel Inclination trends. The numerical simulation results show that the internal forces of the tendons decrease with the increase of the inclination of the panel of the reinforced earth retaining wall. Based on the numerical results, the mechanism of panel inclination is analyzed from two aspects: the stress state of the soil element near the potential sliding surface and the balance of the sliding wedge. The vertical earth pressure of the fill and the horizontal frictional resistance of the panel base The key factors affecting the internal force of tendons.