新型装配扶壁式挡土墙的抗震性能研究

发布时间：2018-05-13 06:46

本文选题：装配扶壁式挡土墙 + 结合面　；参考：《中国农村水利水电》2017年03期

【摘要】：新型装配扶壁式挡土墙具有环保美观,施工速度快的优点,但存在新老混凝土结合面及拼接缝,影响结构整体性。结合宿迁市马陵河整治工程,采用有限元法,研究了该挡土墙结构在设计地震作用下应力、变形特性,并预测了其极限抗震能力,分析了新老混凝土结合面强度参数对结构抗震性能的影响。结果表明,在设计地震作用下,新老混凝土结合面剪应力小于抗滑力,剪切变形很小,属弹性变形,结合面黏结良好;拼接缝处面板拉应力远小于混凝土抗拉强度设计值;预测超载的挡土墙极限抗震能力为0.50 g;接触面摩擦系数在0.4以上,结构可保证整体性,抗震能力较强,摩擦系数降至0.2以下,结构抗震能力显著降低。该工程新型装配扶壁式挡土墙的抗震安全性满足要求,技术方案是可行的。
[Abstract]:The new type of buttress retaining wall has the advantages of environmental protection and beauty, fast construction speed, but there are new and old concrete joints and jointed joints, which affect the integrity of the structure. The stress and deformation characteristics of the retaining wall structure under the action of design earthquake are studied by using finite element method, and its ultimate seismic capacity is forecasted in connection with the project of harnessing the Maling River in Suqian City, and the finite element method is used to study the stress and deformation characteristics of the retaining wall. The influence of the strength parameters of the new and old concrete joints on the seismic behavior of the structure is analyzed. The results show that, under the action of design earthquake, the shear stress of the new and old concrete joints is less than the anti-slip force, the shear deformation is very small, it belongs to the elastic deformation, and the bond surface is bonded well, and the tensile stress of the face slab at the joint is far less than the design value of the concrete tensile strength. The ultimate seismic capacity of the overloaded retaining wall is 0.50 g, the friction coefficient of the contact surface is above 0.4, the structure can ensure the integrity, the seismic capacity is strong, the friction coefficient is lower than 0.2, and the seismic capacity of the structure is significantly reduced. The aseismic safety of the new type of supported retaining wall is satisfied with the requirements, and the technical scheme is feasible.
【作者单位】：河海大学水利水电学院;宿迁市水务局;
【基金】：国家自然科学基金项目(51279054) 江苏省水利科技项目(20168048916)
【分类号】：TV223.7

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