掺膨胀剂水泥土承载力及抬升效应试验研究  

Experimental study on bearing capacity and uplifting effect of cement soil with expansive agent

作　　者：涂保林 雷进生[1,2] 马波 戴康 武增琳 TU Bao-lin;LEI Jin-sheng;MA Bo;DAI Kang;WU Zeng-lin(Hubei Key Laboratory of Disaster Prevention and Reduction,China Three Gorges University,Yichang 443002,China;College of Civil Engineering&Architecture,China Three Gorges University,Yichang 443002,China)

机构地区：[1]防灾减灾湖北省重点实验室(三峡大学),湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《实验力学》2020年第2期355-364,共10页Journal of Experimental Mechanics

基　　金：国家自然科学基金(51709155,51279092)。

摘　　要：利用膨胀剂遇水反应体积膨胀、受约束条件下压强增大的材料特性,探究掺膨胀剂水泥土加固与抬升效应。对掺膨胀剂水泥土进行承载力和膨胀率试验,得到了水泥土抗压强度和体积随不同因素变化的相关曲线。试验结果表明:水泥土中加入膨胀剂后,其承载力和膨胀率有明显提高,验证了利用膨胀性注浆材料加固地基与基础抬升效果的可行性,通过函数拟合得到水泥土位移与反应时间之间呈现良好的指数关系。The reinforcement and uplifting effect of cement soil with expansive agent are explored based on the fact that the expansive agent reacts with water to form volumetric expansion and the pressure increases under the constraint conditions.The bearing capacity and expansion rate of cement soil mixed with expansive agent are tested,and the correlation curves of compressive strength and volume of cement soil changing with different factors are obtained.The results show that the bearing capacity and the expansion rate are improved obviously after adding expansive agent into cement soil,and the feasibility of foundation reinforcement and uplifting based on expansive grouting materials is verified.The exponential relationship between the cement soil displacement and the reaction time is obtained by function fitting method.

关 键 词：膨胀剂 膨胀率 承载力 地基加固 基础抬升 

分 类 号：TU431[建筑科学—岩土工程]