【摘要】：為客觀評價強(qiáng)夯法處理濕陷性壩基的真實效果,結(jié)合杜窯溝水庫濕陷性壩基的工程處理實例,對強(qiáng)夯后初檢和終檢的濕陷系數(shù)、干密度和孔隙比檢測值與強(qiáng)夯前的檢測值進(jìn)行了對比分析。結(jié)果表明,強(qiáng)夯能夠消除壩基濕陷性,提高土體干密度,減小孔隙比;驗證了強(qiáng)夯后應(yīng)延遲檢測,待干密度和孔隙比逐步恢復(fù)提高的結(jié)論;強(qiáng)夯不能對特定深度的土體產(chǎn)生最優(yōu)的壓實效果,夯后干密度沒有呈現(xiàn)分層特征。實例表明,8 000kN·m夯擊能可以消除Ⅱ級非自重~Ⅲ級(嚴(yán)重)自重濕陷性壤土的濕陷性。同時指出需要通過更多的工程實踐,進(jìn)一步研究強(qiáng)夯的作用機(jī)理和內(nèi)在規(guī)律,并探討強(qiáng)夯質(zhì)量檢驗的最佳時間。
[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，

本文編號：2370383