Wando Terminal Ground Improvement Program
Jet Grouting Gains
Jet grouting, a soil stabilization technology developed in Europe, was introduced in the U.S. in the early 1980s. Due, in part, to the use of inappropriate equipment, jet grouting got...
Taming the Urban Underground
When designing and installing excavation support systems at a city construction site, be prepared to deal with the urban jungle. Tunnels and utility cables and pipes clog the underground,...
High-Grade Concrete for the Single Permanent Shotcrete Lining Method
With the single permanent shotcrete lining method in underground construction in rock, a shotcrete layer placed subsequently to the application of the supporting shotcrete replaces the...
Design and Application of Integrated Shotcrete Linings for Underground Openings in Weak Rock Masses
Tunnels and caverns excavated in weak rock masses require special consideration in terms of shotcrete lining design. Shotcrete as a support medium for weak rock provides major benefits...
Active Tunnel Design?A New Concept for Predesign, Contractual Lay-out and Construction Management
Active tunnel Design is a new concept for design, layout of specification and contract, and for construction management of tunnels and underground carverns. Investigations yeild more information...
Austrian Guideline and National Report on the Use of Shotcrete
The purpose of this guideline is the standardization of quality and a uniform procedure for the production and testing of shotcrete from the technical and engineering point of view. In...
Site Measurement of Shotcreting Dust
Shotcreting is broadly used today as an excellent lining system, which enables to assure rapidly the stability of excavated rock surface. This system however leaves room for improvements...
Block Dynamics Modeling in Support of Seismic Design
The behavior of an underground excavation is usually characterized by stresses and displacements which develop around the excavation as a result of prevailing field conditions. For conventional...
Use of Shotcrete on Recent Tunnel Projects in the South and East, USA
Shotcrete and rockbolts are now the primary method of ground support for the majority of rock tunnels in America. This paper describes the use of shotcrete and some of the shotcreting...
Soil Nailing Technique in Tunnel Support
Authors have developed a new pre-lining method (PASS method) in which thin archshell lining is formed ahead of the tunnel face before the excavation to reinforce the ground. This method...
A Note on Physical Modeling Approach for Assessment of Excavation Techniques
With the growing interest in utilizing underground space, the need for quantitative and qualitative assessment of excavation techniques to dictate the best choice for mining is now becoming...
1992: When Things Began to Move at Yucca Mountain
This paper examines progress made on the Yucca Mountain Site Characterization Project (YMP) during 1992 and continuing into 1993. In addition, it discusses and describes design work on...
Mine Support, Radiation and Ventilation Control with Spray-on Barriers
The use of spray-on liner agents to provide localized excavation support in place of traditional techniques such as shotcrete or bolts-and-screen has been the subject of extensive investigation....
Cycletime Simulation of Shield-Tunneling Operation
Computer simulation...
Design of Pre-excavated Scour Hole Below Flip Bucket Spillways
A number of tests were performed on a model-scale flip bucket spillway with a gravel-bed plunge pool in order to develop equations to describe the geometry of the scour hole created by...
Microtunneling: Overview and Case Study
Microtunneling is defined in the United States as a remotely controlled, laser guided pipe jacking process, which does not require personnel entry. This paper describes the components...
Geologic Aspects of the Mt. Hope Pumped Storage Project, Dover, NJ
Vacuum Excavation Makes Clean Sweep of Utilities
In Hazwaste Field, Excavation Becomes Transportation
Return to search