水合物赋存模式对含水合物土力学特性的影响

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Abstract Based on the two synthesis methods of hydrate in soils，the unsaturation sampling(US method) and gas diffusion sampling method for saturation soil(SD method)，triaxial shear tests are performed to study the effects of occurrence mode of hydrate on the mechanical properties of hydrate-bearing soils containing CO2. The experimental results confirm that the occurrence mode and saturation of hydrate have significant impact on the mechanical behaviour of soil with hydrate. In view of the microscopic mechanism，some analysis indicate that samples formed by US method，which are called as cementation mode，exhibit some structure characteristics of cementing soil. the samples formed by SD method，which are called as pore filling mode，loading mode and lenticle mode，show the properties of the friction material significantly，and exhibit strain softening due to the crushing damage of hydrate during the shearing period. Besides，by introducing a new parameter—the effective saturation of hydrate，a formula considering the influence of hydrate synthesis methods，which can predict the shearing strength of hydate-bearing soil，is proposed.

Key words： soil mechnics hydrate occurrence mode mechanical behaviour

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	Articles by authors
	YAN Rongtao1
	2
	WEI Changfu2
	FU Xinhui1
	ZHONG Xiaobin3
	XIAO Guiyuan1

Cite this article:

YAN Rongtao1,2,WEI Changfu2, et al. INFLUENCE OF OCCURRENCE MODE OF HYDRATE ON MECHANICAL BEHAVIOUR OF HYDRATE-BEARING SOILS[J]. , 2013, 32(s2): 4115-4122.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/4115

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