面板倾角对模块式面板加筋土挡墙筋材内力的影响

发布时间：2018-06-07 02:01

本文选题：加筋土挡墙 + 数值模拟　；参考：《岩土工程学报》2017年09期

【摘要】：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。
[Abstract]:Geotextile reinforced retaining wall has been widely used at home and abroad because of its good mechanical properties and superior economy. However, the experimental data of reinforced earth retaining wall show that the theoretical study on the mechanism of reinforced earth retaining wall is lagging behind the engineering practice. In order to solve the important problem of internal force calculation of reinforced earth retaining wall, the influence of slab inclination angle on the internal force of reinforced earth retaining wall is studied. Firstly, the effectiveness of the numerical simulation method is verified by using the RMC test retaining wall as the prototype, and then the numerical simulation method is used to analyze the effectiveness of the numerical simulation method under different working conditions. The variation trend of vertical earth pressure and strain of reinforced earth retaining wall with the increase of slab inclination angle. The numerical simulation results show that the internal force decreases with the increase of the inclined angle of reinforced earth retaining wall. Based on the results of numerical study, the mechanism of slab inclination is analyzed from two aspects: the stress state of soil element near the potential sliding surface and the balance of sliding wedge. Two key factors, vertical earth pressure and horizontal friction resistance of the face slab, which affect the internal force of the reinforcement, are located.
【作者单位】：华中科技大学土木工程与力学学院;
【基金】：国家自然科学基金项目(51379082)
【分类号】：TU476.4;TU531.7

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