土工基础

土工基础 ›› 2025, Vol. 39 ›› Issue (5): 799-802.

• 测试技术 • 上一篇    下一篇

天津滨海地区浅部土层石灰改良后工程强度特性试验研究

高志斌1，温升亮1，任建兴2，姬生伟1   

  1. （1.天津滨海国际机场有限公司，天津 300300；2.天津市勘察设计院集团有限公司，天津 300191）
  • 收稿日期:2023-08-17 修回日期:2023-09-21 出版日期:2025-10-31 发布日期:2025-10-30
  • 作者简介:高志斌（1974-），男，硕士，正高级工程师，研究方向机场工程。

Experimental Study on the Strength Characteristics of Tianjin Binhai Shallow Soft Soil Improved by Lime

GAO Zhibin1, WEN Shengliang1, REN Jianxing2, JI Shengwei1   

  1. (1.Tianjin Binhai International Airport Co. Ltd., Tianjin 300300;
    2.Tianjin Investigation Survey and Design Institute Group Co. Ltd., Tianjin 300191)
  • Received:2023-08-17 Revised:2023-09-21 Online:2025-10-31 Published:2025-10-30

摘要： 深大基坑开挖中往往面临如何处理利用废弃开挖土的难题，其中滨海地区浅层土开挖再利用尤为困难。依托天津某机场工程，对天津滨海地区埋深15 m以上土层掺入消石灰后土样进行了大量试验，在对天然土基本性质分析基础上，探讨了素土（消石灰掺入比0%）及消石灰掺入比8%、15%、20%土样的击实特性，分析了消石灰不同掺入比压实度0.90、0.93、0.96土样的直剪固结快剪强度、无侧限抗压强度的规律，进一步认清了天津滨海地区浅部土层掺消石灰后的强度特性，为机场建设中深基坑开挖土料用于场地抬高回填、道路回填、肥槽回填等设计和施工提供了可靠的参考依据。

关键词: 浅部土层, 石灰土, 压实度, 掺入比, 强度特性

Abstract: How to deal with the waste soil is a difficult problem in the large deep excavation projects. It is particularly difficult to excavate and reuse the shallow soil in coastal areas. This paper presents a case history of an airport engineering project in Tianjin. A large number of tests were performed on the samples of Tianjin Binhai soft soil with depths less than 15m and mixed with slaked lime. Based on analyzing the basic properties of the natural soil, the compaction characteristic of soil samples containing 0%,8%,15% and20% slaked lime was discussed. Meanwhile, the consolidated quick direct shear strength and the unconfined compressive strength of soil samples with various mixing lime ratios and degrees of compaction of 0.90, 0.93 and 0.96 were studied. The strength characteristics of the Tianjin Binhai shallow soil mixed with the slaked lime are further evaluated. It provides a reliable reference for the design and construction, when the shallow soil from the deep excavation uses in the site backfill, road backfill, and utility trench backfill.

Key words: Shallow Soils, Lime Treated Soils, Degree of Compaction, Mixing Ratio, Strength Characteristics

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