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Geomechanics and Engineering Volume 37, Number 5, June10 2024 , pages 499-510 DOI: https://doi.org/10.12989/gae.2024.37.5.499 |
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Mechanical properties of stabilized saline soil as road embankment filling material |
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Li Wei, Shouxi Chai and Pei Wang
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| Abstract | ||
| In northern China, abundant summer rainfall and a higher water table can weaken the soil due to salt heave, collapsibility, and increased moisture absorption, thus the chlorine saline soil (silty clay) needs to be stabilized prior to use in road embankments. To optimize chlorine saline soil stabilizing programs, unconfined compressive strength tests were conducted on soil treated with five different stabilizers before and after soaking, followed by field compaction test and unconfined compressive strength test on a trial road embankment. In situ testing were performed with the stabilized soils in an expressway embankment, and the results demonstrated that the stabilized soil with lime and SH agent (an organic stabilizer composed of modified polyvinyl alcohol and water) is suitable for road embankments. The appropriate addition ratio of stabilized soil is 10% lime and 0.9% SH agent. SH agent wrapped soil particles, filled soil pores, and generated a silk–like web to improve the moisture stability, strength, and stress–strain performance of stabilized soil. | ||
| Key Words | ||
| in situ testing; moisture stability; road embankments; stabilized saline soil; unconfined compressive strength | ||
| Address | ||
| Li Wei: School of Civil Engineering, Tianjin Chengjian University, NO.26, Jinjing Road, Xiqing District, Tianjin, China Shouxi Chai and Pei Wang: School of Geology and Geomatics, Tianjin Chengjian University, NO.26, Jinjing Road, Xiqing District, Tianjin, China | ||