高分子材料改性粉土力学特性试验研究及机制探讨

doi:10.13722/j.cnki.jrme.2014.s2.117

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Abstract Silty soil is modified by polymer material from aspects to improve water stability. Indoor direct shear test and unidirectional compression test were conducted to research shearing strength and compressive deformation characteristics before and after submerging. Testing results show that (1) J1–6 proportion silty soil，compared with common silty soil，has a better shearing strength. After submerged，PAM cohesion polymerization decreases，and strength decreases. Compression deformation is great because PAM is capable of playing a role in lubrication. (2) G2–5 proportion silty soil can improve shearing strength at some extent and reduce compression deformation. After submerged，crumb structure and aggregated structure are desctroyed. Decreased strength，increased deformation and bad hydrolytic resistance are showed. (3) Because of combined action of sodium silicate and PAM，GJ6–9 proportion modified silty soil has a high polymer material protection layer on the surface，which greatly improve the cohesion and internal friction angle and also has a better hydrolytic resistance and less deformation. Through the research of effects of modifying agents and its mixture amount as well as submerging conditions on shear strength and compressive deformation，the best proportion is determined and degradation behavior under submerging condition is grasped.

Key words： soil mechanics polymer material silty soil submerging condition shear strength compressive deformation

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	DONG Jinmei1
	2
	ZHU Hua1
	BIAN Jiang1
	GAO Hongmei1

Cite this article:

DONG Jinmei1,2,ZHU Hua1, et al. EXPERIMENTAL RESEARCH ON MECHANICS CHARACTERISTICS AND MECHANISM OF SILTY SOIL MODIFIED BY POLYMER MATERIAL[J]. , 2014, 33(S2): 4326-4334.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.117 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/4326

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