›› 2012, Vol. 33 ›› Issue (1): 96-102.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study of improvement properties of rudaceous coal-bearing soil

YANG Wen-jun1, 2，HONG Bao-ning1, 2，ZHOU Bang-gen3，KANG Liang-zhen4   

  1. 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098; 2.Geotechnical Research Institute, Hohai University, Nanjing 210098, China; 3. Anhui Branch of Shanghai Municipal Engineering Design Institute, Hefei 230011, China; 4. Yunfu-Wuzhou Expressway Ltd. of Guangdong Province, Yunfu, Guangdong 527300, China
  • Received:2010-05-05 Online:2012-01-10 Published:2012-01-17

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Abstract: In light of the problem that the rudaceous coal-bearing soil which ranges along with Guangzhou-Wuzhou Expressway can’t content for soil subgrade filler claim, two improvement schemes of the soil by respectively mixing quicklime and cement are put forward and improvement tests are accordingly taken for contrasting study according to the results of test in laboratory. The result indicated that the effect by mixing cement is evidently better than that by mixing quicklime of the rudaceous coal-bearing including consolidation properties, California bearing ratio (CBR), water stability, etc.; its shear strength properties, unconfined compressive strength and resistance deformability are all evidently increased by mixing cement; in factors effecting strength of the rudaceous coal-bearing soil, cement mixing ratio is the most salient, followed by age and water content, and a fitted formula which is affected by multi-factors is put forward according to the test result of unconfined compressive strength. The rudaceous coal-soil which is mixed with about 3 percent cement is entirely able to meet the claim for subgrade filler, which offers useful reference to roadbed treatment in coal-bearing soil region.

Key words: coal-bearing soil, improvement properties, shear strength, unconfined compressive strength

CLC Number: 

  • TU 443
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