›› 2009, Vol. 30 ›› Issue (4): 1078-1082.

• Geotechnical Engineering • Previous Articles     Next Articles

Laboratory experimental study of soil-water characteristic curves of unsaturated soils of Zhengzhou-Kaifeng underpass project

JIANG Kun1，DING Wen-qi1，CHEN Bao1，SHI Du-zheng2   

  1. 1. Department of Geotechnical Engineering, Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China；2. Channel Construction Management Office of Zhengzhou to Kaifeng, Zhengzhou 450003, China.
  • Received:2007-09-10 Online:2009-04-10 Published:2011-01-30

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Abstract:

：Based on osmotic method and vapor phase technique, the soil-water characteristic curves of unsaturated soils-the sandy powder soil and the silty clay which produced by dewatering construction of Zhongzhou-Kaifeng underpass project were studied. Results show that the air-enter values for the sandy powder soil and the silty clay are about 2 kPa and 250 kPa; the residual saturation degree values are about 15 MPa and 28 MPa and the desorption process of both unsaturated soils shows clearly in step-phase. The step-phase study of characteristic curves of unsaturated soils has very important meaningful for dewatering construction and the excavation face reinforcement of Zhengzhou-Kaifeng project.

Key words: dewatering construction, unsaturated soil, osmotic method, vapor phase technique, soil-water characteristic curve

CLC Number: 

  • TU 443
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