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- Title
高速铁路堆载预压路基基底土厚度与沉降量关系研究.
- Authors
时学军; 陶 灿; 柯 芬
- Abstract
In order to study the relationship between soil thickness and settlement of high-speed railway subgrade under load preloading, based on the layered summation method, the constitutive relation of soil structure with normal strain in x, y and z directions was analyzed, and a non-linear formula model of soil thickness and settlement of subgrade foundation was deduced. Based on the two sections of preloading subgrade by loading in the experimental station house, the soil of the subgrade was divided into compressive soil and non-compressive soil. Through collecting settlement monitoring data during surcharge preloading, the deduced non-linear formula model was input into SPSS professional statistical software, and the non-linear curve fitting was carried out for the correlation between soil thickness and settlement of subgrade foundation. Finally, the fitting formula was obtained by iteration calculation, with the R2 correlation coefficient of 0. 78 and 0. 89 respectively. Using this research result, the final settlement after loading preloading can be calculated by the thickness of subgrade foundation soil, and the settlement near the unobserved section can also be calculated to compensate for the missing data of sampling interval.
- Subjects
SOIL depth; SETTLEMENT of structures; CURVE fitting; STATISTICAL software; STATISTICAL correlation; BEARING capacity of soils; SOIL structure
- Publication
Railway Investigation & Surveying, 2022, Vol 48, Issue 4, p15
- ISSN
1672-7479
- Publication type
Article
- DOI
10.19630/j.cnki.tdkc.202104120001