|Table of Contents|

Effect of particle gradation on collapse characteristics of compacted gravel sand chloride saline soil(PDF)

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

Issue:
2024年06期
Page:
162-170
Research Field:
岩土工程
Publishing date:

Info

Title:
Effect of particle gradation on collapse characteristics of compacted gravel sand chloride saline soil
Author(s):
ZHANG Shasha1;  YI Fangzheng1;  YANG Xiaohua1;  ZHANG Ruiyuan1;  CHEN Weizhi2
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, Sichuan, China)
Keywords:
subgrade engineering;  chlorine saline soil;  particle gradation;  collapsibility
PACS:
TU448
DOI:
10.19815/j.jace.2023.02046
Abstract:
In order to explore the influence of particle size distribution on the collapse characteristics of gravel sand chloride saline soil, indoor collapsibility tests were carried out for compacted sand(gravel sand, coarse sand, medium sand)and gravel saline soil. Based on the test data, the analysis model of collapse rate and various influencing factors was constructed by SPSS software, and the sensitive parameters and weights of collapsibility of gravel sand chlorine saline soil were clarified. The results show that the collapsibility rate of gravel sand saline soil increases first and then decreases with the increase of fine particle content and 2-5 mm particle content. The collapsibility rate of coarse sand and medium sand saline soil decreases with the increase of fine particle content, and increases with the increase of 2-5 mm particle content. The collapsibility rate of gravel saline soil increases with the increase of fine particle content, and increases first and then decreases with the increase of salt content. For gravel sand, the influence weights of fine particle content and 2-5 mm particle content on its collapsibility rate are 0.864 and 0.126 respectively. For coarse sand, the influence weights of fine particle content and 2-5 mm particle content on its collapsibility rate are 0.257 and 0.722 respectively. For medium sand, the influence weights of fine particle content and 2-5 mm particle content on its collapsibility rate are 0.573 and 0.411 respectively. For gravel saline soil, the influence weights of salt content, fine particle content and 2-5 mm particle content on its collapsibility rate are 0.681, 0.234 and 0.049 respectively.

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Last Update: 2024-12-10