摘要
为探索高含水率泥浆经济有效的脱水方法,探讨了振动作用和负压效应加快泥浆脱水的可行性,并设计了室内模拟试验。试验过程中监测排水量随时间变化并取样测定排水含土量,通过施加不同频率的振动力、改变振动范围以及使用不同单位面积质量的土工织物滤层,对振动-负压排水法处理工程泥浆的效果开展了研究。试验结果表明:①负压排水相较重力排水,能够形成真空并提升排水速率,加快排水进程,对负压排水施加振动力能够对泥浆形成扰动,加快自由水的排出,缓解土工织物淤堵,提高排水速率;②扩大振动范围以及提高振动频率均能提高振动-负压法处理泥浆的排水速率,但过高的振动频率会使土工织物滤层失效、土颗粒大量流失;③振动-负压排水法处理泥浆时应当采用较低频率振动和较厚的土工织物,以保证土工织物滤层的有效性。
In order to explore an economical,effective and rapid dewatering method for high water content mud,the feasibility of combining vibration and negative pressure to accelerate mud dewatering was discussed,and an indoor simulation test was designed.During the test,the drainage volume was monitored over time,and the soil content in the drainage was measured.The effect of vibration-negative pressure drainage method on the treatment of engineering mud was studied by applying different frequency vibration force,changing vibration range and using geotextile filter layer with different mass per unit area.The test results showed that compared with gravity drainage,negative pressure drainage can generate vacuum and increase the drainage rate,and accelerate the drainage process.Applying vibration force to negative pressure drainage can disturb the mud,accelerate the discharge of free water,alleviate the clogging of geotextiles,and increase the drainage rate.Expanding the vibration range and increasing the vibration frequency can improve the drainage rate of the mud treated by the vibration-negative pressure method,but too high vibration frequency will cause the failure of the geotextile filter layer and the loss of soil particles.When using the vibration-negative pressure drainage method to treat the mud,lower frequency vibration and thicker geotextile should be used to ensure the effectiveness of the geotextile filter.
作者
卢星宇
储兆微
袁帅
孙红月
LU Xingyu;CHU Zhaowei;YUAN Shuai;SUN Hongyue(Ocean College,Zhejiang University,Zhoushan 316021,China)
出处
《人民长江》
北大核心
2023年第6期208-213,共6页
Yangtze River
关键词
泥浆脱水
负压排水
振动频率
振动范围
土工织物
mud dewatering
negative pressure drainage
vibration frequency
vibration range
geotextile
