外荷载和电压耦合作用下吹填土固结试验研究

通过联合使用电渗固结与预压排水技术进行电渗试验,分析怎样改善吹填土的排水固结效果。对于不同含水量的吹填土试样,同时施加12.5 kPa～400 kPa的外荷载和2.5 V,5.0 V,7.5 V的外电压,研究外荷载和电压的耦合作用下吹填土含水量的变化规律。通过试验研究表明:仅有外荷载作用下,吹填土含水率变化缓慢,当在耦合作用下,吹填土含水率变化明显,能够大大提高吹填土的排水速度,提高抗剪强度;在耦合作用下,有利于加快吹填土后期沉降速率。

Experimental research on consolidation of dredger filling under external load and voltage coupling

The paper undertakes the electro-osmosis experiment by using the electro-osmotic consolidation and the preloading drainage,analyzes how to improve the drainage and consolidation effect of the dredger filling,imposes 12.5 kPa ～ 400 kPa external load and the external voltage with 2.5 V,5.0 V,and 7.5 V on the samples of the electro-osmosis with different water content,researches the change laws for the water content of the dredger filling under the coupling effect of the external load and voltage,proves by the experimental results that the water content change slowly only under the effect of the external load,the water content change of the dredger filling obviously under the coupling effect,so the drainage speed of the dredger filling and the anti-shearing strength can be improved and the settlement speed at the later period of the dredger filling can also be accelerated.