氯鹽漬土無側(cè)限抗壓強(qiáng)度及體變特性研究

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中圖分類號：TU411 文獻(xiàn)標(biāo)志碼：A 文章編號：1005-8249（2025）03-0090-06

DOI：10.19860/j.cnki.issn1005-8249.2025.03.017

Abstract：Inorder toexploretheinfluenceofchlorinesaltcontentandmoisturecontentontheinfluenceofsoilstrengthand bodycharacteristics，accuratelyanalyzetheexteral conditionschange chlorinesalinesoil strengthchangeandtheinternal causes ofbodychange，throughthe methodofaddingdiferentcontent NaClconfigurationsinglesalt salinesoil，using no limit compression testand SEMscanningEMmethod.Theresultsshow that theoveralstrengthof chlorinesalinesoil increases with the decrease of water content， 12% water content as the critical point for the strength change of chlorine saline soil，At a moisture content greater than 12% ，The strength of the soil decreased with increasing salt content，When the moisture content is less than 12% ，The strength of the soil was 3%NaCl>1%NaCl>5%NaCl> without NaCl；The body change of chlorine saline soilconsistsofthreeparts：elasticcompresion deformation during samplepreparation，body shrinkage during waterloss and salt sweling， In the absence of NaCl， 1%NaCl and 3%NaCl ，At 5% NaCl content with decreasing moisture content， The soilshowsthechangelawofthefirstbodyshrinkageandthenthebodyexpansion，Thebodyshrinkageisthelargestwhenthe moisture content is at 15% ；SEM SEM images display，The NaCl crystals in the soil fillthe gap between the soil particles or wrapthesoilparticlesinaglazeshape，Aectthestrengthandbodychangeofthesoil，SEMimageanalysisrevealedthelargest number of soil pores without NaCl ， 3% NaCl has the least number of pores.

Key words： unconfined compression; saline soil; strength; volume change

0 引言

鹽漬土在我國西北內(nèi)陸分布很廣，其工程性質(zhì)表現(xiàn)出浸水后溶陷、強(qiáng)度降低、黏性增大，失水后鹽脹、強(qiáng)度提高、壓縮性降低的特點(diǎn)，在復(fù)雜多變的建設(shè)工程環(huán)境下，經(jīng)常引發(fā)建筑物地基不均勻沉降、邊坡失穩(wěn)、路基鼓脹或溶陷等病害。（剩余5514字）