【摘要】 桩板式挡土墙因结构简单可靠、施工占地小、建设费用低等特点，已被多个河道整治工程采用。桩板式挡土墙常布置在软黏土地基中，桩土间力学特性较为复杂。为厘清桩土间土拱效应形成的影响因素，采用数值模拟的方法，研究桩间距、土体抗剪参数、桩土间的摩擦系数对土拱效应的影响。结果表明，桩间距为2～5倍的桩宽时土拱效应最强；土拱作用随土体黏聚力减小、内摩擦角增大而增强；桩土间摩擦系数越大，桩间土体受到桩体的约束越强，反向应力拱越强。研究成果可为桩板式挡土墙设计提供参考。更多还原

【Abstract】 Pile-plate retaining walls have been adopted in multiple river regulation projects due to their simple and reliable structure, small construction footprint, and low construction costs. Pile-plate retaining walls are often arranged in soft clay foundations, and the mechanical properties between piles and soil are relatively complex. This paper aims to clarify the influencing factors of soil arch effect between piles and soil, and uses numerical simulation methods to study the effects of pile spacing, soil shear parameters, and friction coefficient between piles and soil on soil arch effect. The results indicate that the soil arch effect is strongest when the pile spacing is 2-5 times the pile width; The soil arch effect increases with the decrease of soil cohesion and the increase of internal friction angle;The larger the friction coefficient between piles and soil, the stronger the constraint of the pile on the soil between piles, and the stronger the reverse stress arch. The research results can provide reference for the design of pile-plate retaining walls.更多还原