土钉最大轴力与基坑稳定性的研究
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摘要
采用有限差分软件FLAC3D,对土钉在各种因素影响下的内力分布规律进行研究,得出土钉轴力沿钉长的分布表现为中间大而两边小的纺锤形;得出影响土钉轴力大小的因素依次为:地表荷载,土的摩擦角,地表荷载到基坑距离,土钉间距,土的粘聚力,钉长,钉土粘结强度,并得到了轴力与各因素间的关系式。将计算结果应用于某基坑工程,现场测试结果与数值模拟结果符合程度较好。
The distributions of inner force of soil nails in foundation pit affected by various factors are studied with software FLAC3D.It shows that the axial force of soil nails presents fusiform along the nail length with the maximum axial force taking place at the middle part of the pit and minor force at the pit sides.And the influential factors of the maximum axial force are ranked as ground load,frictional angle of soil,spacing from the ground load to pit,nail spacing,soil cohesion,nail length,clinging strength of soil-nail.An expression is set up for the relationship between the axial force of soil nails and the affecting factors.When it is applied to a foundation pit works,the site test results accord well with that of the expression calculation.
The distributions of inner force of soil nails in foundation pit affected by various factors are studied with software FLAC3D.It shows that the axial force of soil nails presents fusiform along the nail length with the maximum axial force taking place at the middle part of the pit and minor force at the pit sides.And the influential factors of the maximum axial force are ranked as ground load,frictional angle of soil,spacing from the ground load to pit,nail spacing,soil cohesion,nail length,clinging strength of soil-nail.An expression is set up for the relationship between the axial force of soil nails and the affecting factors.When it is applied to a foundation pit works,the site test results accord well with that of the expression calculation.
引文
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