|Table of Contents|

Research on Sensitive Parameters of Salt Expansion Characteristics for Coarse-grained Sulfite Saline Soil Based on BP Model(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2021年03期
Page:
107-116
Research Field:
Publishing date:

Info

Title:
Research on Sensitive Parameters of Salt Expansion Characteristics for Coarse-grained Sulfite Saline Soil Based on BP Model
Author(s):
ZHANG Sha-sha1;  LIU Rui-rui1;  WANG Yong-wei2
(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;  coarse-grained sulfite saline soil;  BP neural network model;  sensitive parameter
PACS:
TU448
DOI:
10.19815/j.jace.2020.08062
Abstract:
In order to determine the sensitive parameters of embankment deformation behavior for coarse-grained sulfate saline soil, the quantitative analysis model of the correlation sensitive parameters and the quantitative indexes of the interaction between the factors of coarse-grained sulfate saline soil were proposed. Aimed at three types of soil samples, including gravel sulfite saline soil, sandy soil-I(fine-grained soil content is 15%)sulfite saline soil, sandy soil-II(fine-grained soil content is 50%)sulfite saline soil, based on the single factor salt expansion test results, the salt expansion tests under the interaction of multiple factors were performed with the orthogonal design method. The calculation model between salt expansion rate and other relevant influence factors of three coarse-grained sulfite saline soil was established through BP neural network model. The quantitative indexes of sensitive parameters for the deformation behavior of coarse-grained sulfite saline soil were studied. The results show that the interaction of salt content and water content, overburden load and water content has a significant effect on salt expansion of gravel sulfite saline soil. The interaction of salt content and water content, overburden load and salt content has a significant effect on salt expansion of sandy soil-II sulfite saline soil. The overburden load has a strong inhibitory effect on coarse-grained sulfite saline soil. The initial compaction degree has a certain effect on the salt expansion rate, due to its special gradation characteristics, the degree of compaction set by the experiment(from 89% to 97%)has little effect on the salt expansion rate. The results can provide a technical reference for engineering design and construction using coarse-grained sulfite soil as subgrade filling.

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Last Update: 2021-05-20