滨海地基软土碳化加固影响因素研究  

Factors Affecting Carbonation-Induced Solidification of Littoral Soft Soil Base

作　　者：张艳林 李时臻 王东星[2,3] 朱贵荣 卓师婷 Zhang Yanlin;Li Shizhen;Wang Dongxing;Zhu Guirong;Zhuo Shiting(Sinohydro Engineering Bureau 7 Co.,Ltd.,Chengdu Sichuan 610213,China;School of Civil Engineering Wuhan University,Wuhan Hubei 430072,China;School of Civil Engineering,University of South China,Hengyang Hunan 421001,China)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都610213 [2]武汉大学土木建筑工程学院,湖北武汉430072 [3]南华大学土木工程学院,湖南衡阳421001

出　　处：《港口航道与近海工程》2025年第2期34-40,46,共8页Port,Waterway and Offshore Engineering

基　　金：湖北省自然科学基金杰出青年项目(2024AFA051);湖南省自然科学基金青年A类项目(2025JJ20049)。

摘　　要：为快速改善滨海相地基软土力学性能,通过掺入工业废渣、活性MgO等材料构建新型绿色固化技术,开展CO_(2)碳化和无侧限抗压强度试验,研究不同材料类型等多因素对地基软土加固效果影响。结果表明:5%活性MgO试验组,适当增加含砂量能够提升碳化试样抗压强度;电石渣相比其它类型工业废渣对强度提升效果最明显,抗压强度提升幅度最高可达18.7倍;添加水泥利于改善碳化效果,水泥掺量25%时达到最大值,抗压强度最高提升27.7倍;适量增加碳化时间利于提高掺粉煤灰、矿渣及水泥固化试样碳化增强效能且有效提升CO_(2)吸收量,但时间过长导致碳化效率急剧下降。To improve the mechanical properties of littoral facies soft soil base,CO_(2) carbonation and unconfined compressive strength tests were carried out by adding industrial wastes and reactive MgO etc.that were combined to be a new green solidification technique.By studying the influence of various materials and other factors on the soft soil improvement,it was found that an appropriate increase in sand content could improve the compressive strength of carbonation specimens subject to 5%reactive MgO.Carbide slag could improve soft soil base obviously in comparison with other industrial wastes,the compressive strength could be raised up to 18.7 times.Cement could improve the carbonation efficiency,the maximum value could be reached based on 25%cement,the compressive strength could be increased up to 27.7 times.To prolong the carbonation time could improve the carbonation effect of the specimens with fly ash,slag or cement,and enhance the amount of absorbed CO_(2).However,an excessively long carbonation time would induce a sharp decline in carbonation efficiency.

关 键 词：地基软土 工业废渣 碳化试验 抗压强度 碳化时间 

分 类 号：TU43[建筑科学—岩土工程]