上覆压力对袋装固化淤泥强度影响的试验研究  

Experimental Study on Effects of Overburden Pressure on Short-Time Strength of Stabilized Sludge in Soilbag

作　　者：童俊辉 宋春雨[1] 庄迎春[2] 马聪[1] 陈龙珠[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]中国电建华东勘测设计研究院有限公司,浙江杭州310014

出　　处：《人民黄河》2017年第5期127-130,139,共5页Yellow River

基　　金：国家自然科学基金资助项目(51208297)

摘　　要：以沿海滩涂淤泥的快速固化为目的,通过多组试验,在有一定上覆压力情况下,分别对添加12%水泥和混合型固化剂CSCN的福建海相淤泥进行贯入阻力等测试,以了解固化淤泥的短期强度发展规律及影响因素。试验结果表明:在排水条件良好的情况下,上覆压力有助于加速提高固化土的贯入阻力,但随着时间的延长,其影响逐渐减弱;在初始含水量为90%~150%时,CSCN比单一水泥加固淤泥的效果要好,但透水性相对要低,这些差别来源于它们加固淤泥的化学机理不同。In order to develop a method to accelerate consolidation of the sea beach sludge,a number of tests were conducted to study the mechanism and factors affecting the short- ter^n strength of the stabilized Fujian sea beach sludge. Penetration resistance tests were carried out by using a pocket penetrometer on sludge specimens stabilized with 12 % of cement and stabilizer CSCN respectively. The results show that an increase in overburden pressure leads to increasing short- term penetration resistance under the good drainage conditions. How-ever,the influ-ence of overburden pressure diminishes with prolonged loading time. In addition,the penetration resistance decreases with increasing initial water content. The increase of strength in the first day is more than that in the following two days. The tests also show that the water retaining property of the CSCN stabilized sludge is better than that of the cement stabilized sludge. Generally,the CSCN is a better stabilizer than ce-ment at initial water content betw-een 90% and 150%.

关 键 词：淤泥固化 上覆压力 微型贯入仪 贯入阻力 沿海滩涂 

分 类 号：TV871.1[水利工程—水利水电工程]