本文選題：非飽和土 + 膨脹土��； 參考：《工程地質(zhì)學(xué)報》2017年03期

【摘要】：為研究荷載變化方式對膨脹土線膨脹率測定的影響,模擬路堤的實際荷載變化對用于路堤填芯膨脹土的線膨脹率測定進(jìn)行試驗,結(jié)果顯示,線膨脹率隨著上覆荷載的增大而減小,隨著初始干密度的增大而增大。將模擬路堤荷載變化狀態(tài)的線膨脹率試驗結(jié)果與規(guī)范加載方式的試驗結(jié)果進(jìn)行對比分析,結(jié)果顯示,兩種荷載變化方式的線膨脹率測定差值較大,且初始干密度越小、上覆荷載越小,荷載變化方式對線膨脹率測定值的影響越大,表明在線膨脹率測定過程中不考慮實際工程的荷載變化方式對用于工程膨脹土的膨脹變形指標(biāo)測定具有一定的影響,對膨脹土路堤的變形量預(yù)測產(chǎn)生一定的影響,在進(jìn)行膨脹土線膨脹率測定時需要考慮實際的荷載變化方式,并結(jié)合荷載變化方式進(jìn)行線膨脹率測定。
[Abstract]:In order to study the influence of load change mode on the measurement of line expansion rate of expansive soil, the actual load change of simulated embankment is used to test the line expansion rate of expansive soil used for embankment filling. The results show that, The linear expansion ratio decreases with the increase of overburden load and increases with the increase of initial dry density. The results of line expansion test of embankment load change state are compared with those of standard loading mode. The results show that the difference of line expansion ratio between the two load variation modes is larger, and the initial dry density is smaller. The smaller the overlying load, the greater the influence of load change mode on the measured value of linear expansion rate. The results show that the load variation mode of practical engineering is not considered in the on-line expansion rate measurement process, which has a certain influence on the deformation prediction of expansive soil embankment, which is used in the measurement of swelling deformation index of engineering expansive soil. When measuring the linear expansion rate of expansive soil, the actual load change mode should be considered, and the linear expansion rate should be measured in combination with the load change mode.
【作者單位】： 南京交通職業(yè)技術(shù)學(xué)院路橋與港航工程學(xué)院;
【分類號】：U416.12

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本文編號：1875605