Contact Pressure Distribution on Subgrade Soil Underlying Geocell Reinforced Foundation Beds
Contact Pressure Distribution on Subgrade Soil Underlying Geocell Reinforced Foundation Beds
复制标题
土工格室加筋基床下路基土的接触压力分布
DOI：
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发表时间：
2019
影响因子：
3
通讯作者：
S. Nimbalkar
中科院分区：
文献类型：
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作者：
S. Dash;R. Saikia;S. Nimbalkar
由于荷载的增加，地基土中产生的高接触应力会导致损坏、不稳定和大沉降。土工格室加固技术在改善地基基础性能方面得到了广泛的应用。通过模型试验和数值分析，研究了土工格室加筋基床地基土压力分布规律。试验数据表明，土工格室加筋显著降低了路基土的接触压力。因此，路基土壤往往保持完整，直到大负荷的基础上，导致显着的性能改善。通过数值分析可以看出，基础下区域的土工格室处于受压状态，基础外区域的土工格室处于受拉状态。这表明，土工格室钢筋的权利，在基脚直接支持基脚负荷，通过动员其压缩刚度和弯曲刚度。然而，土工格室钢筋的端部通过源自土壤被动阻力和摩擦的锚固的移动以次要方式有助于性能改善。
High contact stresses generated in the foundation soil, owing to increased load, causes distress, instability and large settlements. Geocell reinforcement is being widely used for the performance improvement of foundation beds. Pressure distribution on subgrade soil in geocell reinforced foundation beds is studied through model tests and numerical analysis. The test data indicates that with provision of geocell reinforcement the contact pressure on the subgrade soil reduces significantly. Consequently, the subgrade soil tends to remain intact until large loadings on the foundation leading to significant performance improvement. Through numerical analysis it is observed that the geocells in the region under the footing were subjected to compression and beyond were in tension. This indicates that the geocell reinforcement right under the footing directly sustains the footing loading through mobilisation of its compressive stiffness and bending rigidity. Whereas, the end portions of the geocell reinforcement, contribute to the performance improvement in a secondary manner through mobilisation of anchorage derived from soil passive resistance and friction.