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以深圳北站枢纽工程新区大道改造工程桩锚基坑为背景,对K0+760断面进行有限元数值模拟计算,并与实测数据进行对比。分析结果显示:MIDAS-GTS运用于实际工程分析是可行的,具有较高的准确性;基底端部距桩2 m处出现最大隆起量,且随着基坑深度发展急剧增大;基底中部隆起量呈线性增大。在基底端部距桩2 m处增设限位桩能有效减小基底最大隆起量,限位桩加设在基底中心对基底隆起无明显影响。
Based on the pile foundation pit in the reconstruction project of Xinbei Avenue of North Station of Shenzhen, finite element numerical simulation of section K0 + 760 was carried out and compared with the measured data. The results show that MIDAS-GTS is feasible and has high accuracy in practical engineering analysis. The maximum uplift of the base end occurs at 2 m from the pile and increases sharply with the depth of foundation pit. The amount increased linearly. The addition of limit piles at 2 m from the end of the base can effectively reduce the maximum uplift of the base. The addition of the limit piles to the center of the base has no significant effect on the base uplift.