湿陷性坝基强夯法处理效果分析与评价
发布时间：2018-12-10 09:51
【摘要】：为客观评价强夯法处理湿陷性坝基的真实效果,结合杜窑沟水库湿陷性坝基的工程处理实例,对强夯后初检和终检的湿陷系数、干密度和孔隙比检测值与强夯前的检测值进行了对比分析。结果表明,强夯能够消除坝基湿陷性,提高土体干密度,减小孔隙比;验证了强夯后应延迟检测,待干密度和孔隙比逐步恢复提高的结论;强夯不能对特定深度的土体产生最优的压实效果,夯后干密度没有呈现分层特征。实例表明,8 000kN·m夯击能可以消除Ⅱ级非自重~Ⅲ级(严重)自重湿陷性壤土的湿陷性。同时指出需要通过更多的工程实践,进一步研究强夯的作用机理和内在规律,并探讨强夯质量检验的最佳时间。
[Abstract]:In order to evaluate objectively the true effect of dynamic compaction on collapsible dam foundation, combined with the engineering treatment example of the collapsible dam foundation in Duyaogou reservoir, the collapsibility coefficient of initial and final check after dynamic compaction is studied. The measured values of dry density and void ratio were compared with those before dynamic compaction. The results show that the dynamic compaction can eliminate the collapsibility of the dam foundation, increase the dry density of the soil and reduce the void ratio, and verify the conclusion that the detection should be delayed after the dynamic compaction, and the dry density and the void ratio should be gradually restored. Dynamic compaction can not produce optimal compaction effect on soil with specific depth, and dry density does not show stratification characteristics after compaction. The example shows that 8 000kN m tamping can eliminate the collapsibility of grade 鈪，
本文编号：2370383
[Abstract]:In order to evaluate objectively the true effect of dynamic compaction on collapsible dam foundation, combined with the engineering treatment example of the collapsible dam foundation in Duyaogou reservoir, the collapsibility coefficient of initial and final check after dynamic compaction is studied. The measured values of dry density and void ratio were compared with those before dynamic compaction. The results show that the dynamic compaction can eliminate the collapsibility of the dam foundation, increase the dry density of the soil and reduce the void ratio, and verify the conclusion that the detection should be delayed after the dynamic compaction, and the dry density and the void ratio should be gradually restored. Dynamic compaction can not produce optimal compaction effect on soil with specific depth, and dry density does not show stratification characteristics after compaction. The example shows that 8 000kN m tamping can eliminate the collapsibility of grade 鈪，
本文编号：2370383
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