Salt expansion rate prediction model of sandy sulfite saline soil(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2016年06期
- Page:
- 10-16
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Salt expansion rate prediction model of sandy sulfite saline soil
- Author(s):
- ZHANG Sha-sha; WANG Yong-wei; YANG Xiao-hua; LIU Wei
- 1. School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China； 2. CCCC Second Harbour Engineering Co. Ltd., National Enterprise Technology Center, Wuhan 430040, Hubei, China
- Keywords:
- road engineering; sand sulfite salty soil; prediction model; orthogonal design; analysis of variance
- PACS:
- U416.1; TU448
- DOI:
- -
- Abstract:
- In northwest China, central Asia and west Asia, there is a large number of sandy sulfite saline soil. How to effectively use it relates to the healthy development of the ecological environment, economy and construction in these regions. In order to make full and effective use of the regional resources and clarify salt expansion rate prediction model and effect weight of salt expansion five elements for sandy sulfite saline soil, based on fine sandy sulfite saline soil and the soluble salt content experimental method of screening method of 5 mm, using quadratic regression orthogonal design to determine test factors level, through 25 groups of salt-heaving experiments, salt-heaving rate regressive equation was established. Then the equation and regression coefficients’ significance were verified by the analysis of variance. Moreover, the simplified salt expansion rate prediction model of sandy sulfite saline soil was established. The calculated values were compared and verified with the actual values. The primary and secondary relations of affecting factors of sandy sulfite-saline soil salt-heaving rate were determined by SPSS stepwise regression analysis. The results show that the sensitive parameters of sandy sulfite saline soil effects on the salt heaving rate sequentially are salinity(0.612), load(0.12), water(0.116), interaction of salinity and moisture(0.107), interaction of salinity and load(0.025), interaction of water and load(0.006). The contribution of the soluble salt to the salt heaving rate of sandy sulfite saline soil is more than 50%. The overlying load is relatively little inhibitory effect on the salt expansion rate of sandy sulfite saline soil. The interaction of four factors of salt expansion for sandy sulfite saline soil is mainly reflected in the soluble salt and water, the soluble salt and the overlying load. The research results can provide technical reference for engineering design and construction in the sandy sulfite saline soil area.
Last Update: 2016-12-02