压实时间对固化土强度影响试验  

Experimental study on influence of compaction period on strength of solidified soil

作　　者：赵子荣[1,2] 徐建勇 陈永辉[1,2] 陈庚[1,2] 王波[1,2] 李斌 ZHAO Zirong XU Jianyong CHEN Yonghui CHEN Geng WANG Bo LI Bin(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanfing 210098, China Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China Zhefiang Provincial Institute of Communications Planning, Design and Research, Hangzhou 310006, China Construction Headquarters of Highway 31 North Extension Section in Shaoxing, Shaoxing 312000, China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]江苏省岩土工程技术工程研究中心,江苏南京210098 [3]浙江省交通规划设计研究院,浙江杭州310006 [4]31省道北延绍兴市区段工程建设指挥部,浙江绍兴312000

出　　处：《河海大学学报（自然科学版）》2016年第6期531-535,共5页Journal of Hohai University(Natural Sciences)

基　　金：水利部公益性行业科研专项(201401006);水利部"948"项目(201435);浙江省交通运输厅科技计划项目(2012H29;2014H28)

摘　　要：以固化土压实时间、水泥掺量和养护龄期为控制变量,通过无侧限抗压强度试验研究上述变量对固化土强度的影响。结果表明:压实时间过长一方面使得固化土便于压实,另一方面又会损失压实时间内的胶结强度;对其进行机理分析,发现重塑固化土强度与试样干密度相关,并通过试验数据拟合出线性公式。建议固化土拌和后应尽早使用,以求更好地发挥水泥的胶结作用,否则必须提高其压实度,才能达到设计要求。The influence of the compaction period,cement content,and curing period on the strength of solidified soil was studied using an unconfined compressive strength test. The results show that a compaction period that is two long makes the solidified soil more easily compacted,but causes a loss of the cementing strength. According to mechanism analysis,it is found that the strength of the remolded solidified soil is related to the dry density of the sample,and a linear equation is fitted to test data. Based on the test results,it is recommended that solidified soil be used as soon as possible after mixing so as to make full use of cementation of cement. Otherwise,it is necessary to improve the degree of compaction in order to achieve the design requirements.

关 键 词：固化压实土 重塑固化土 无侧限抗压强度 压实时间 水泥掺量 养护龄期 干密度 

分 类 号：TU411[建筑科学—岩土工程]