真空预压联合电渗加固吹填土现场试验研究

Field Tests on Dredger Fill Foundation by Vaccum Preloading Incorporated with Electro-osmosis

为进一步推进真空预压与电渗联合加固在大规模吹填土地基推广应用,依托温州一吹填淤泥工程进行了现场真空预压联合电渗法现场对比试验,并简要介绍了此方法的施工工艺。对膜下真空度、地表沉降、孔隙水压力、电流电压变化进行了分析,着重研究加固后地基承载力增长规律。试验结果表明:真空预压联合电渗法加固效果明显,并且土体深层承载力也得到一定程度的增长。证明了导电排水板在电渗中的有效性和可行性。试验的成功将对真空预压联合电渗法在大规模吹填土地基加固中提供借鉴意义。

In order to promote greatly the application of vacuum preloading incorporated with electro-osmosis in large dredger fill foundation, field comparison tests on improvement technology were performed based on a soft foun- dation filled in Wenzhou, and the construction technology of vaccum preloading incorporated with electro-osmosis was describde in brief. The vacuum pressure, surface settlement, pore pressure, current and voltage are analysed, and the development of bearing capacity is studied mainly. The results show that the consolidation effect is evident and the deep bearing capacity is increased greatly. The test also proved that the EVD is effective and feasible in electro-osmosis. The success of this field tests would promote greatly the application of vaccum preloading incorpo- rated with electro-osmosis in large dredger fill foundation.