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桩锚-土钉组合支护中土钉受力规律

Keywords: 桩锚复合土钉支护,土钉墙,数值模拟,岩土工程软件(FLAC)

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Abstract:

以北京某典型的桩锚-土钉组合支护为例,采用国际通用岩土工程软件FLAC(fastLagrangiananalysisofcontinua)-2D,对桩锚复合土钉支护中土钉的内力及变化规律进行了研究,并和现场实测结果进行了比较.实测数据与规范、数值模拟结果的对比分析表明,桩锚复合土钉支护土钉的受力略小于同样条件下纯土钉墙支护土钉的受力;土钉内力变化规律与土钉墙支护土钉内力变化基本一致;桩锚复合土钉支护土钉部分的破裂面与规范破裂面在底部差异较大.探讨了现有复合土钉支护计算方法的不足,同时也表明了用FLAC软件进行复合土钉支护土钉内力分析和优化设计,可以得到较好的结果.

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