高速铁路深挖路堑软岩基底变形防治机理研究

运用FLAC3D软件对西南地区某软岩深挖路堑基底加固处理进行数值模拟，对控制效果进行对比分析，研究软岩地基持续上拱变形的有效控制措施。研究结果表明:软岩地基采取加固措施后不会改变地基中位移场的发展形式，但在一定程度上对地基出现的变形起到较好地控制作用；桩板结构对基底岩体产生的竖向变形控制效果优于对其水平向变形的控制，该措施能较好地限制地基浅表层发生的蠕变变形。

Study on Prevention and Control Mechanism of Deformation of Deep-cut Cutting Basis of Soft Rock Foundation along High-speed Railway

FLAC3D software was used to conduct numerical simulation of the reinforcement of deep-cut cutting basis of soft rock foundation in the southwest regions, and then the control effects were compared and analyzed. The control measures for continiuous upheaval deformation of soft rock foundation were studied. The result shows that: the reinforcement measures for the soft rock foundation, when put into effect, will not change the development form of the displacement field therein, but control the foundation deformation to a certain extent; the control effect of pile-slab structure on the vertical deformation of base rock mass is better than that on the horizontal deformation; these measures can better restrain the creep deformation of shallow surface of the foundation.