基于压汞试验的珠海软土微观孔隙特征分析

doi:10.13722/j.cnki.jrme.2022.1004

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Abstract It is of great significance to study the microstructure of soft soil for engineering construction. In order to investigate the microstructural characteristics of soft soil in Zhuhai，a series of mercury intrusion porosimetry (MIP) tests were conducted for soft soil samples. According to the test results，the pore diameter of soil is distributed in the range of 3 nm–338 ，the total pore volume is 0.2–0.3 mL/g，and the average pore diameter is 50–85 nm. The pore characteristics curves of soil samples show a single-peak distribution pattern. With the increase of depth，the pore volume of the soil gradually decreases，the dominant pore size gradually decreases，and the soil pore size is more concentrated. The effect of stack pre-pressure on soft soil is significant，the total pore volume can be reduced by 15%，and the porosity can be reduced by 10%. According to the cumulative mercury injection percentage curve，there are obviously two turning points，the microscopic pores of soft soil in Zhuhai can be divided into micro-pores(＜10 nm)，small pores(10–360 nm) and large pores(＞360 nm)，of which large pores account for about 4% and micro-pores account for about 5%.

Key words： soil mechanics soft clay microstructure mercury intrusion porosimetry pore distribution characteristics

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	Articles by authors
	LI Dong1
	PENG Song2
	CHANG Dan2
	LIU Jiankun2
	NAN Jiyun2
	WANG Xu1
	CAO Xiong1

Cite this article:

LI Dong1,PENG Song2,CHANG Dan2, et al. Analysis of microscopic pore characteristics of Zhuhai soft soil based on mercury intrusion method[J]. , 2023, 42(S2): 4289-4298.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.1004 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS2/4289

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