基于盾构渣土改良的流动化回填土的工程性能研究

doi:10.19952/j.cnki.2096-5052.2023.04.01

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摘要采用泡沫剂和活性氧化镁双掺对盾构渣土进行协同改良。通过流动性、泌水率及抗压强度系列试验得到不同泡沫剂和活性氧化镁掺量下的改良土流动度、泌水率以及抗压强度变化规律。结果表明:改良后的流动化回填土具备良好的流动性与固化强度;通过调节泡沫剂和活性氧化镁掺量,可得到流动度为180~320 mm、泌水率小于5%、28 d强度为0.6~1.2 MPa的流动化回填土,适用于更广泛的工程需求。

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	曾长女
	王子正
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	任磊

关键词: 渣土资源化泡沫剂活性氧化镁流动度泌水率抗压强度

Abstract: This study aimed to enhance shield muck by incorporating foam agent and active magnesium oxide. The fluidity, bleeding rate and compressive strength of the improved soil under different foam agent and active magnesium oxide content were obtained by fluidity, bleeding rate and compressive strength test. It was showed that the improved flowable backfill soil exhibited excellent fluidity and solidified strength. By adjusting the content of foam agent and active magnesium oxide, the flowable backfill soil with fluidity ranging from 180 mm to 320 mm, bleeding rate below 5%, and 28-day compressive strength between 0.6 MPa and 1.2 MPa could be obtained.

Key words: muck resource foam agent active magnesium oxide fluidity bleeding rate compressive strength

收稿日期: 2023-07-30 修回日期: 2023-09-22 发布日期: 2023-12-19

中图分类号:

X705

基金资助: 河南省科技研发计划联合基金资助项目(222103810075);河南工业大学创新基金支持计划专项资助项目(2022ZKCJ07)

作者简介: 曾长女(1978— ),女,江西南丰人,教授,博士生导师,博士,主要研究方向为低碳材料与可持续能源岩土工程研究. E-mail:zengcnv@126.com

引用本文:

曾长女, 王子正, 曹硕倩, 任磊. 基于盾构渣土改良的流动化回填土的工程性能研究[J]. 隧道与地下工程灾害防治, 2023, 5(4): 1-8.
ZENG Changnü, WANG Zizheng, CAO Shuoqian, REN Lei. Engineering performance of flowable backfill soil based on shield muck. Hazard Control in Tunnelling and Underground Engineering, 2023, 5(4): 1-8.

链接本文:

http://tunnel.sdujournals.com/CN/Y2023/V5/I4/1

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[1]	曾长女, 王子正, 曹硕倩, 任磊. 盾构渣土改良为流动化回填土的工程性能研究[J]. 隧道与地下工程灾害防治, 0, (): 1-.

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