水泥掺合料石灰桩配合比试验研究  

Experimental Study on Mix Ratio of Cement Admixture Lime Pile

作　　者：程志 郑晓敏 贺世开 CHENG Zhi;ZHENG Xiaomin;HE Shikai(Planning and Research Center,Guangzhou Power Supply Bureau,Guangzhou 510600;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070)

机构地区：[1]广州供电局规划研究中心,广州510600 [2]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《土工基础》2022年第1期85-88,共4页Soil Engineering and Foundation

基　　金：中国南方电网有限责任公司科技项目(080041KK5217001/GZJKJXM20170046)。

摘　　要：传统的石灰桩加固地基多采用粉煤灰作为掺合料,但掺合料石灰桩存在易软芯、强度不高的缺点,而且粉煤灰在运输与存放过程中往往难以满足现场施工的粉尘控制环境要求。在广州南沙变电站场地加固工程中采用低标号水泥作为掺合料,制备了不同水泥配比条件下的石灰桩掺合料试样,进行自由吸水试验与相关室内试验,获得合理的水泥掺量,室内试验结果表明水泥是一种较为理想的石灰桩掺合材料,在工程中取得了较好的效果。Fly ashes are frequently used as one of the admixtures for the lime columns in ground improvement projects. The disadvantages the utilization of the fly ashes are the relatively low strength and the existence of soft zones within the lime columns. Further, the environmental requirements for the dust control in airs can hardly be met during the transportation and the storage of the fly ashes at the site. To minimize these shortcomings of using fly ashes, the low strength grade cement was successively utilized as the admixtures in the lime columns. The laboratory free water absorption and other tests were conducted on lime-cement-soil mixtures with various cement ratios. The test results indicate that the low strength grade cement is an ideal admixture in the lime columns applied in ground improvement projects.

关 键 词：石灰桩 配合比试验 膨胀性 无侧限抗压强度 

分 类 号：TU411[建筑科学—岩土工程]