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The Key Technology of High-Speed Railway Foamed Lightweight Soil Subgrade
The demand for high-speed railways for new line access has gradually increased with the continuous expansion of the scale of China's high-speed railway network. It is necessary to solve the problem of settlement control of the existing station subgrade formation with the increased load of new line access. Foamed lightweight soil is a type of material formed by cement, foaming agent, and water hardened by physical and chemical actions. Featuring high strength and lightweight, it is used to widen the subgrade, which effectively solves the differential settlement and deviation caused by the traditional roadbed filling. Meanwhile, the roadbed treatment technology can be simplified, and the construction period can be shortened. In this paper, strength development mechanism and performance evolution law of foamed lightweight soil in China’s high-speed railway, subgrade structure type and design method of foamed lightweight soil subgrade structure in high-speed railway, and application of high-speed railway subgrade widening engineering are introduced. The results show that as a new type of lightweight and high-strength subgrade structure, the foamed lightweight soil subgrade is an effective mean to solve the problem of settlement and deformation control of high-speed railway subgrade widening and also provides a new solution for settlement control of transition sections, soft soil subgrade, steep slope sections, and other sections.
The Key Technology of High-Speed Railway Foamed Lightweight Soil Subgrade
The demand for high-speed railways for new line access has gradually increased with the continuous expansion of the scale of China's high-speed railway network. It is necessary to solve the problem of settlement control of the existing station subgrade formation with the increased load of new line access. Foamed lightweight soil is a type of material formed by cement, foaming agent, and water hardened by physical and chemical actions. Featuring high strength and lightweight, it is used to widen the subgrade, which effectively solves the differential settlement and deviation caused by the traditional roadbed filling. Meanwhile, the roadbed treatment technology can be simplified, and the construction period can be shortened. In this paper, strength development mechanism and performance evolution law of foamed lightweight soil in China’s high-speed railway, subgrade structure type and design method of foamed lightweight soil subgrade structure in high-speed railway, and application of high-speed railway subgrade widening engineering are introduced. The results show that as a new type of lightweight and high-strength subgrade structure, the foamed lightweight soil subgrade is an effective mean to solve the problem of settlement and deformation control of high-speed railway subgrade widening and also provides a new solution for settlement control of transition sections, soft soil subgrade, steep slope sections, and other sections.
The Key Technology of High-Speed Railway Foamed Lightweight Soil Subgrade
Lecture Notes in Civil Engineering
Tutumluer, Erol (editor) / Nazarian, Soheil (editor) / Al-Qadi, Imad (editor) / Qamhia, Issam I.A. (editor) / Yao, Jianping (author) / Cai, Degou (author) / Cheng, Guanzhi (author) / Li, Si (author) / Xie, Jiao (author)
2021-08-31
13 pages
Article/Chapter (Book)
Electronic Resource
English