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高填方涵洞不同于一般的结构物,对涵洞地基处理不当可能导致涵洞出现各种各样的病害。对涵洞地基处理时加固区与过渡区的刚度关系进行了理论计算。通过数值模拟,对涵洞地基处理进行了研究,分析了地基处理的宽度、深度对涵洞受力状态和沉降的影响。研究结果表明,涵顶土压力随地基处理宽度的增大而减小,并逐渐趋于稳定,随地基处理深度的增加呈非线性增大。实际工程中,涵洞地基处理宽度宜取2～3倍的涵洞基础宽度,地基处理的深度应以沉降作为控制指标,不应额外增加地基处理深度。
High-fill culverts are different from the general structure, improper handling of culverts may lead to various culverts culverts. The relationship between the stiffness of the reinforcement zone and the transition zone in the treatment of culvert foundation is theoretically calculated. Through numerical simulation, the treatment of culvert foundation is studied, and the influence of foundation treatment width and depth on culvert stress state and settlement is analyzed. The results show that the pressure on the culvert decreases with the increase of the foundation treatment width and gradually becomes stable, with the increase of the foundation treatment depth increases nonlinearly. In practical engineering, the width of culvert foundation treatment should take 2 to 3 times the width of culvert foundation. The depth of foundation treatment should take settlement as control index, and the depth of foundation treatment should not be increased.