›› 2011, Vol. 32 ›› Issue (2): 448-452.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of effect factors of heavy compaction test for wheat straw-reinforced saline soil

WANG Pei1, CHAI Shou-xi1, WANG Xiao-yan2, WEI Li1, LI Min3   

  1. 1. Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin Institute of Urban Construction, Tianjin 300384, China; 2. Institute of Investigation, China Water Resources, Beifang Investigation, Design and Research Co. Ltd., Tianjin 300222, China; 3. Key Laboratory of Mechanics on Disaster and Environment in Western China of Education Ministry, Lanzhou University, Lanzhou 730000, China
  • Received:2009-09-07 Online:2011-02-10 Published:2011-02-16

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Abstract:

In order to increase the strength and anti-deformation of inshore saline soil, reinforced saline soil with wheat straw can be used for overcoming some problems from salt expansion and dissolution. Saline soil and anti-corrosive wheat straw is mixed in a certain of length and mass ratio, and is compacted in the condition of some compaction way, water content of soil and mass ratio and length of wheat straw is selected as effect factors for compaction effectiveness in heavy compaction test. The results indicate that: (1) Maximum dry density of reinforced soil is smaller than that of saline soil, and these optimum water contents are approximate. (2) Dry densities of saline soil and reinforced soils increase first, then decrease. (3) With the increase of mass ratio and length of wheat straw, optimum water contents of reinforced soils are hardly changed, but these dry densities decrease continuously at a low speed. (4) Dry density with mass ratio of 0.2% is the most one, and that with 0.3% is the least one. (5) Dry density with length of 30 mm is the most one, and that with 70 mm is the least one. It should be proposed that samples of reinforced soil is made in the condition of mass ratio of 0.2% and length of 30 mm for studying the strength and stress-strain by means of triaxial shear test.

Key words: heavy compaction test, wheat straw, inshore saline soil, optimum water content, maximum dry density

CLC Number: 

  • TU 448
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