固化淤泥土的力学特性试验研究  

Experimental Research on the Mechanical Properties of Solidified Silt

作　　者：钟石明 李栋伟 王红旗 陈涛[1] 贾志文 秦子鹏 夏明海 ZHONG Shi-ming;LI Dong-wei∗;WANG Hong-qi;CHEN Tao;JIA Zhi-wen;QIN Zi-peng;XIA Ming-hai(School of Civil and Architectural Engineering,East China University of Technology,Nanchang 330013,China;College of Water Conservancy and Environmental Engineering,Zhejiang Institute of Water Resources and Hydropower,Hangzhou 310018,China;Irrigation Management Department of Water Conservancy Engineering in Kuitun River Basin,Ili Kazakh Autonomous Prefecture,Kuitun 833200,China)

机构地区：[1]东华理工大学土木与建筑工程学院,南昌330013 [2]浙江水利水电学院水利与环境工程学院,杭州310018 [3]伊犁哈萨克自治州奎屯河流域水利工程灌溉管理处,奎屯833200

出　　处：《科学技术与工程》2023年第16期7016-7024,共9页Science Technology and Engineering

基　　金：国家自然科学基金(42061011,41977236);江西省自然科学基金(20192ACBL20002);新疆兵团科技计划项目(2020AB003)。

摘　　要：淤泥土具有高含水率,高压缩性,强度低等特点,工程建设中容易产生不均匀沉降等危险。为改善淤泥类土的力学性质,实现淤泥资源利用,选取工业矿渣为固化材料,以硅酸钠和氯化钙为激发剂,对淤泥土进行改良。通过开展无侧限抗压试验,分析矿渣、硅酸钠、氯化钙掺量和龄期变化对试样力学性能的影响。结果表明:矿渣在激发剂的作用下能显著提高淤泥土的强度,其强度随矿渣掺量近似呈线性增长的趋势。硅酸钠对矿渣的激发效果明显优于氯化钙,其临界掺量为9%;氯化钙对强度并无明显增长,甚至表现出负面效应。基于试验数据建立固化淤泥土强度预测模型,可以对固化淤泥土的无侧限抗压强度进行准确预测。研究成果为矿渣固化淤泥土的工程应用提供试验基础。Silt soil has the characteristics of high moisture content,high compressibility and low strength,and it is easy to produce dangers such as uneven settlement in the construction of the project.In order to improve the mechanical properties of the sludge soil and realize the utilization of sludge resources,the industrial slag was selected as the curing material,and the silt was modified with sodium silicate and calcium chloride as the activator.The effects of slag,sodium silicate,calcium chloride doping and age change on the mechanical properties of the specimen were analyzed by carrying out the unconventional compressive test.The results show that the slag can significantly improve the strength of the silty under the action of the activator and its strength shows a linear growth trend with the amount of slag doping.The excitation effect of sodium silicate on slag is significantly better than that of calcium chloride,and its critical doping amount is 9%;Calcium chloride did not increase significantly in strength and even showed negative effects.Based on the test data,a prediction model for the strength of cured soil can be established,which can accurately predict the unconstrained compressive strength of cured soil.The research results can provide a reference for engineering design.

关 键 词：固化淤泥土 矿渣 应力-应变关系 变形模量 强度预测 

分 类 号：TU443[建筑科学—岩土工程]