Research on the Criterion of Instability of the High-Fill Soft Roadbed

• Published in: Slope Stability, Retaining Walls, and Foundations pp. 243 - 248
• Main Authors: Li, Xiao-Ying, Shi, Jin-Na, Gong, Wen-Yi, Liu, Chun-Yuan
• Format: Book Chapter
• Language: English
• Published: American Society of Civil Engineers (ASCE) 2009
• Subjects: Civil Engineering; Civil Engineering & Construction Materials; Environment & Environmental Engineering; General References; Mine Design & Construction; Mining Engineering & Extractive Metallurgy; Soft soils; Research; Subgrades
• ISBN: 0784410496; 9780784410493
• DOI: 10.1061/41049(356)35

In one fleet of a freeway construction, the right side of the roadbed suddenly taken place to sideslip and collapse largely towards outside, then the left side of it began to slip and collapse too. The slumping section is 130 m, and the highest degree of collapse of the Roadbed slump is 4.3m, both the pavement of construction and the lateral reed field welling up for 1.0m, settlement crack appears in the culvert around the fleet, among which the width of largest crack is 40cm. The wall of the culvert have distorted deformation. The creeping section ranges from the freeway "K39+720" to "K39+920", within which "K39+720"—"K39+868" was treated by Plastic Drainage Board and "K39+868"—"K39+920" was treated by concrete mixed piles. Not before the fifth day did the landslip stopped. The main content of this passage is to analyze the main factors that affect the Slope progressive failure calculating result. In use of this theory, two-dimensional progressive failure about the slope mentioned above can be calculated; and then on the results of the slope program, the security analysis on the slope combined with specific characteristics is carried. At last, design standards on security indicators of the high-fill soft soil roadbed are given.