黄河下游粉砂土掺量对泡沫轻质土性能的影响

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关键词：泡沫轻质土；粉砂土；性能试验；微观结构；黄河下游中图分类号：TU528．4 文献标志码：A doi：10．3969 ／ j．issn．1000－1379．2025．06．024引用格式：，等．黄河下游粉砂土掺量对泡沫轻质土性能的影响［J］．人民黄河，2025，47（6）：156－160．

Impact of Lower Yellow River Silt Incorporation on the Properties of Foamed Light Weight Soil

ZHANG Jing1， XU Shaohui2， WANG Shuai1， XIE Bingkun2， WANG Hao2， ZHAO Xianhao 2 （1．Henan Natural Resources Monitoring and Land Consolidation Institute， Zhengzhou 450016， China；

2．School of Civil Engineering and Architecture， Henan University， Kaifeng ， China）

Abstract： Foam lightweight soil is important filler for road embankment， but there are problems such as large dry shrinkage deformation and insufficient strength of large volume foam lightweight soil． Foam lightweight soil was produced by using silt soil from the lower reaches of the Yellow River as fine aggregate． The effects of silt soil content under different design wet densities on the flow value， compressive strength， dry shrinkage rate and durability were analyzed through experiments， and the relationship between its microstructure and mechanical properties was analyzed through numerical simulation． The results show that as the silt soil content increases， the 28- day compressive strength of foamed lightweight soil decreases． According to the existing specifications， combined with engineering examples and test results， foam lightweight soil is recommended as the sub⁃grade filler． The mixing ratio of silt soil is 20%-30% ， and the dry shrinkage rate of foam lightweight soil decrea⁃ ses with the increase of the mixing ratio of silt soil． Observing the microstructure， it is found that the addition of silt soil can expand the pore distribution range of lightweight soil．

Key words： foamed lightweight soil； silt soil； performance testing； microstructure； Lower Yellow River

0 引言

黄河下游地区地势相对平缓，历史上黄河洪水挟带大量泥沙在此淤积，逐渐形成了分布面积大且厚度可观的粉砂土［1］。（剩余7071字）