Load Bearing Characteristics of Prefabricated Ecological Retaining Wall
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摘要: 针对传统柱板墙的排水性能差、可绿化性差、预制化程度低等缺点，将传统柱板墙实心立柱改造成中空结构并对其进行分段，各部件通过螺栓连接；将其挡土板进行改进，得到一种百叶窗形的挡土板。为确定其适用性、安全性，首先对其进行足尺破坏性试验，再利用ABAQUS有限元软件，对此类挡墙进行三维数值模拟。得到以下结论：当荷载达到202.5 kN时，对立柱柱底取矩，即当弯矩达到337.50 kN·m时，达到正常使用极限状态，当荷载达到335 kN，对立柱柱底取矩，即弯矩达到558.33 kN·m时，达到极限承载状态；该类挡墙在用于路肩墙与路堤墙工况下具有差异性，表现为用于路堤墙时为开口的胀肚形多段“U”形曲线，而用于路肩墙时为闭口的胀肚形多段“U”形曲线；随着车辆荷载距离的增加，挡墙结构受力减小速率先增大后减小。Abstract: Aiming at the disadvantages of traditional column slab wall, such as poor drainage performance, poor greening ability and low degree of prefabrication, the column of column slab wall is segmented and hollowed out, and the components are connected by bolts. By improving the retaining plate, a shutter shaped retaining plate is obtained. In order to determine its applicability and safety, the full scale destructive test is carried out firstly, and then the three-dimensional numerical simulation of this kind of retaining wall is carried out by using ABAQUS finite element software. The following conclusions are obtained: when the load reaches 202.5 kN, the moment at the bottom of the column, that is, when the bending moment reaches 337.50 kN·m, it reaches the limit state of normal use; when the load reaches 335 kN, take the moment at the bottom of the column, that is, when the bending moment reaches 558.33 kN·m, it reaches the limit state. This kind of retaining wall is different when it is used for the shoulder wall and the embankment wall, which shows that when it is used for the embankment wall, it is an open bulging "U" curve, while when it is used for the shoulder wall, it is a closed bulging "U" curve. With the increase of vehicle load distance, the force reduction rate of retaining wall structure first increases and then decreases.
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表 2 输入参数
单元 杨氏模量
/MPa泊松比 密度
/（kg·m−3）黏聚力
/kPa内摩擦角
/（°）基土 25 0.3 1800 15 25 砼 30000 0.2 2700 钢筋 200000 0.3 7800 
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