养护温度对MICP技术改良伊犁黄土力学性能的影响研究

Study on the effect of curing temperature on the mechanical properties of Ili loess modified by MICP technology

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DOI 10.12208/j.sdr.20260006
刊名
Scientific Development Research
年,卷(期) 2026, 6(1)
作者
作者单位

新疆大学地质与矿业工程学院 新疆乌鲁木齐

摘要
为探究养护温度对微生物诱导碳酸钙沉淀(Microbially induced carbonate precipitation, MICP)技术改良伊犁黄土力学性能的影响,开展了无侧限抗压强度试验,分析了25℃、30℃及35℃三种温度下MICP处理试样的强度变化规律。结果表明:MICP处理能显著提升土体强度,但加固效果受温度影响显著。在25℃条件下,试样峰值强度为60 kPa,较未处理试样提高了16.13%;当温度升至30℃时,峰值强度达到81.68 kPa,增幅为58.06%;而在35℃下,峰值强度为67.50 kPa,增幅降至30.64%。可见,适度升温(如30℃)有助于增强MICP的胶结效果,但温度过高(如35℃)可能抑制微生物活性或沉淀效率,导致加固效果下降。因此,在实际工程中应重视温度影响,在高温环境下需考虑控温、调节菌液活性或结合其他工艺,以保障MICP技术的处理效果与工程可靠性,为其环境适应性优化提供依据。
Abstract
To investigate the effect of curing temperature on the mechanical properties of Yili loess improved by Microbially Induced Carbonate Precipitation (MICP) technology, unconfined compressive strength tests were conducted. The strength variation patterns of MICP-treated specimens were analysed at temperatures of 25°C, 30°C, and 35°C. Results indicate that MICP treatment significantly enhances soil strength, yet the consolidation effect is markedly influenced by temperature. At 25°C, the peak strength reached 60 kPa, representing a 16.13% increase over untreated specimens. When the temperature rose to 30°C, peak strength reached 81.68 kPa, with an increase of 58.06%. However, at 35°C, peak strength was 67.50 kPa, with the increase rate decreasing to 30.64%. Evidently, moderate temperature elevation (e.g., 30°C) enhances MICP's cementation effect, whereas excessively high temperatures (e.g., 35°C) may inhibit microbial activity or precipitation efficiency, diminishing reinforcement efficacy. Consequently, practical engineering applications must prioritise temperature considerations. In high-temperature environments, measures such as temperature control, adjustment of bacterial suspension activity, or integration with complementary processes should be implemented to safeguard MICP treatment outcomes and structural reliability, thereby providing a basis for optimising its environmental adaptability.
关键词
伊犁黄土;微生物诱导碳酸钙沉淀;养护温度;无侧限抗压强度
KeyWord
Ili loess; Microbially induced carbonate precipitation; Curing temperature; Unconfined compressive strength
基金项目
页码 27-32
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史光明, 薛元, 张艾, 周长江. 养护温度对MICP技术改良伊犁黄土力学性能的影响研究 [J]. 科学发展研究. 2026; 6; (1). 27 - 32.

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