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结合土钉支护边开挖边支护的特点,建立了以开挖影响面及其上土钉力增量为主要研究对象的施工阶段土钉支护分析模型,给出了施工过程中土钉支护坑壁水平位移的计算方法。采用本文计算方法,计算了Clouterre项目1号墙建造过程中的坑壁水平位移,与量测值符合良好;此外,对基坑几何形状、土体性质和土钉布设情况对坑壁水平位移的影响进行了分析,结果表明符合土钉支护坑壁水平位移的变化规律。
Combined with the characteristics of excavation and edge support of soil nailing support, the analysis model of soil nailing in construction stage is set up, mainly on the influence surface of excavation and the increment of soil nailing force on it, Calculation Method of Horizontal Displacement of Nailing Support Pit Wall. Using the calculation method in this paper, the horizontal displacement of pit wall during the construction of No. 1 Clouterre Project is calculated, which is in good agreement with the measured value. In addition, the horizontal displacement of the pit wall is calculated according to the geometry of foundation pit, The results show that it is in accordance with the regularity of the horizontal displacement of the soil nailing pit wall.