真空–电渗联合加固技术的固结试验研究

针对真空预压与电渗联合加固时存在水流方向相互干扰的问题,在室内试验中开展真空预压与电渗不同联合方式对淤泥脱水效果的研究。试验结果表明:真空预压与电渗异步加固时能够获得比其他联合方式更好的加固效果,而真空预压与电渗交替加固的时间对加固效果也有显著的影响。若交替时间太短,真空预压与电渗将不能充分发挥排水作用,若交替时间太长,真空预压与电渗所提供的能量将不能被充分利用。在现场实际应用中,应根据实测排水量或排水速率的变化不断调整真空预压与电渗交替加固时间。

Experimental studies on vacuum preloading incorporated with electro-osmosis consolidation for dredger fill

The dewatering effect of dredger fill using the vacuum preloading incorporated with electro-osmosis in different ways is evaluated by implementing six laboratory tests. The test results show that the asynchronous consolidation effect of the vacuum preloading incorporated with electro-osmosis is better than that of the other tests. However, the vacuum preloading and electro-osmosis will not be able to give full play to the drainage effect if the alternate time is too short. Alternatively, the energy provided by the vacuum preloading and electro-osmosis will not be able to make full use if the alternate time is too long. There are some advantages when using the vacuum preloading and electro-osmosis asynchronous reinforcement. The alternate time of vacuum preloading and electro-osmosis has to be constantly adjusted according to the water discharge or drainage rate in engineering application.