Ground stabilization for tunnel construction in mixed-face conditions

✍ Scribed by A. Amr Darrag

• Book ID: 104347665
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 650 KB
• Volume: 14
• Category: Article
• ISSN: 0886-7798
• DOI: 10.1016/s0886-7798(99)00046-2

✦ Synopsis

A scheme for providing stability measures for a tunnel excavated in mixed-ground conditions using chemical grouting is described. Typical geotechnical problems encountered during excavation are highlighted. An analytical approach for calculating the required thickness of grouted soil was developed. Grout characteristics to achieve the required behaviour are described, along with the recommended sequence of construction. A methodelogy employing finite element analyses to predict the tunnel behaviour during construction is proposed. It was utilized in designing the excavation support. Predictions compared well with actual field measurements.