Stability Analysis of a New Prefabricated Block Gravity Retaining Wall
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摘要: 提出一种新型装配式砌块重力挡土墙，其主要由现浇混凝土基座、预制块单元、预留注浆孔、后插入钢筋和现浇压顶梁等组成，从墙身预制块、块间连接、基础形式等方面对其结构设计进行了介绍。采用有限元法对新型装配式砌块重力挡土墙在土压力作用下的局部稳定性进行了分析，得到了不同尺寸挡墙的受力破坏模式、位移特征、钢筋应力分布特征，分析结论认为挡墙发生破坏的薄弱处均位于基座与第一层装配体之间。根据有限元数值模拟结果，结合经典挡墙稳定性计算理论，提出了装配式砌块重力挡土墙稳定性分析的计算方法和流程，并用工程算例验证了该计算方法和流程的合理性。Abstract: A new type of prefabricated block gravity retaining wall was proposed, which was mainly composed of cast-in-place concrete base, precast block unit, reserved grouting hole, post-insertion steel bar and cast-in-place pressure top beam, etc., and was designed from the aspects of wall precast block, interblock connection, foundation form, etc. The local stability of the new prefabricated block gravity retaining wall under earth pressure was analyzed by the finite element method, and the force failure mode, displacement characteristics and stress distribution characteristics of retaining walls with different sizes were obtained. It was concluded that the weak points of the failure of the retaining wall were located between the base and the first layer assembly. According to the finite element numerical simulation results, combined with the classical retaining wall stability calculation theory, the calculation method and process of prefabricated block gravity retaining wall stability analysis were proposed, and the rationality of the calculation method and process was verified by engineering examples.
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Key words:
- gravity retaining wall /
- assembled type /
- numerical simulation /
- theoretical analysis /
- stability
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表 2 库仑土压力计算参数
挡墙结构
形式土体重度
γ/（kN·m−3）土体综合
内摩擦角
φ/（°）墙后边坡
坡率m墙背与墙后
土体摩擦角
δ/（°）墙高/m 厚挡墙 19 35 1∶1.5 17.5 5.5 薄挡墙 23 55 1∶0.75 27.5 5.5 
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