Abstract

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Title:: Research progress on foundation treatment techniques of expressway in Loess Area

Author(s):: YANG Xiaohua; ZHANG Jianwei; ZHANG Shasha; YAN Changgen; School of Highway, Changan University, Xian 710064, Shaanxi, China

Keywords:: road engineering; geotechnical engineering; expressway; loess foundation; foundation treatment; research progress

Abstract:: With the scale expansion and speed acceleration of highway infrastructure construction, the development of foundation treatment technology were promoted vigorously and continuously.In order to satisfy the needs of engineering construction in Loess Area, the foundation treatment technology and related theoretical researches of expressway were also indepth. The paper briefly describes the concept and distribution of loess. On the basis of comprehensively summarizing the engineering characteristics of loess, various types of subgrade diseases of the highway in Loess Area caused by the strength, deformation, stability and the permeability of foundation were introduced.Aiming at the treatment of collapsible loess foundations and wet soft loess foundations, on the base of the existing traditional foundation treatment methods, a variety of foundation treatment technologies were applied comprehensively. At the same time,the foundation treatment methods were constantly improved and innovated, and the characteristic and representative new technologies were emerging. Combined with relevant engineering experience and research data, the review of expressway foundation improvement techniques in Loess Area was summarized, which provides a certain reference for expressway foundation treatment in loess area. 9 figs, 89 refs.