摘要
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。
The culvert beneath high embankment is different from the buildings, due to improper ground treatment of culvert, many geotechnical and pavement problems occurred to culverts. The stiffness relationship between reinforced zone and transition zone is calculated theoretically. The ground treatment of culvert is studied and the influence of ground treatment area on the stressing state and settlement char- acteristics are analyzed by numerical simulation. This research reveals that vertical earth pressure is de- creasing with increasing the ground treatment width and gradually tends to limit values, but they are non- linearly increasing with increasing the ground treatment depth. In practical engineering, the ground treat- ment width should be about 2-3 times width of culvert, the ground treatment depth should be controlled by settlement target, but the extra depth is not increased.
出处
《公路》
北大核心
2010年第10期87-90,共4页
Highway
关键词
高填方涵洞
地基处理
理论分析
数值模拟
culvert beneath high embankment
ground treatment
theoretical analysis
numerical simulation
