软土基坑异型阳角变形及加固方式比选

COMPARISON AND SELECTION OF IRREGULAR SHAPED EXTERNAL ANGLE DEFORMATION AND REINFORCEMENT METHODS OF SOFT SOIL FOUNDATION PIT

软土地区基坑阳角处具有明显的时空效应。为提高软土地区基坑开挖过程中的安全性,对软土基坑不同尺寸的阳角变形情况进行监测,并通过MIDAS有限元软件模拟不同加固方式下异型阳角的变形情况。结果表明:与优化插入比相比水泥土搅拌桩可以很好地控制阳角最大位移位置;对于不同尺寸的阳角,可以从安全性与经济性出发优化加固体的大小。

The sunny corner of the foundation pit in the soft soil area has obvious temporal and spatial effects. In order to improve the safety in the excavation process of foundation pits in soft soil areas, the deformation of the external angles of different sizes of soft soil foundation pits was monitored, and the deformation of the abnormal external angles under different reinforcement methods was carried out through the MIDAS finite element software. simulation. Studies have shown that:compared with the optimized insertion ratio of cement-soil mixing piles, the maximum displacement position of the external angle can be well controlled;for external angles of different sizes, the size of the reinforcement can be optimized from the perspective of safety and economy.