土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (1): 85-88.

• 测试技术 • 上一篇    下一篇

水泥掺合料石灰桩配合比试验研究

程 志1，郑晓敏2，贺世开2   

  1. (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)
  • 收稿日期:2019-12-12 修回日期:2020-10-15 出版日期:2022-02-28 发布日期:2022-03-11
  • 通讯作者: 贺世开（1991-），男，博士研究生，研究方向为地基处理、土工效应等。
  • 作者简介:程 志（1976-），男，高级工程师，研究方向为结构工程。
  • 基金资助:
    中国南方电网有限责任公司科技项目(080041KK5217001/GZJKJXM20170046) 

Experimental Study on Mix Ratio of Cement Admixture Lime Pile

CHENG Zhi1, ZHENG Xiaomin2, HE Shikai2   

  1. (1.Planning and Research Center, Guangzhou Power Supply Bureau, Guangzhou 510600;
    2.School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070)
  • Received:2019-12-12 Revised:2020-10-15 Online:2022-02-28 Published:2022-03-11

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。


关键词: 石灰桩, 配合比试验, 膨胀性, 无侧限抗压强度

Abstract: 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.

Key words: lime columns, mixture ratio tests, swelling properties, unconfined compressive strength

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