Trial Lake Dam Reconstruction
Trial Lake Dam is located in the Uinta National Forest in Central Utah at an elevation of about 10,000 feet. The dam is 50 feet high and stores 1,700 acre-feet of water for downstream...
Accelerator for Shotcrete Based Amorphous Calcium Aluminate
The authors developed an accelerator based on amorphous cacium aluminate named NATMIC for shotcrete. In Japan, accelerator based amorphous calcium aluminate are widely used in shotcrete...
Hydration Properties of Shotcrete with an Accelerator Based on Calcium Aluminate
A new powder-type accelerator based on calcium aluminate has been used for shotcrete in underground construction. This accelerator can be applied to all types of shotcreting. The shotcrete...
Steel Fiber Reinforced Shotcrete?An End-User Prospective
Nearly 15 years of experience demonstrates that steel reinforcing fibers in shotcrete offer considerable advantages to all end-users: designers, contractors and owners. These include demonstrable...
Large Scale Testing of Shotcrete
A large scale test program was carried out to evaluate the relative roles of steel fiber and mesh reinforced shotcrete for hard rock stabilization. The most realistic conditions in a tunnel...
What Does Bring Ductility to Steel Fibre Reinforced Shotcrete?
It is generally accepted that ductility is the main characteristic of SFRS. Tests on scale 1/1 have been conducted to determine the influence of ductility on the bearing capacity and crack...
A Comparative Study of Different Steel Fibers in Shotcrete
Two steel fiber reinforced shotcrete (sfrs) test programs have been carried out in eastern Canada using steel fibers which are available in the north American marketplace. The first program...
Design of Tunnel Lining from Shotcrete in Combination with Anchors
The method of designing tunnel linings from shotcrete in combination with anchors is given in the paper. The method is based upon the solution of the plane contact problem for a double-layer...
The Use of Yield-Line Theory in the Design of Steel-Fibre Reinforced Concrete Slabs
Using yield line calculations for steel fibre reinforced slabs a formula for the design strength of shotcrete linings is developed. The formula establishes a connection between the toughness...
Steel Fibre Reinforced Shotcrete Design
There is a need for introducing toughness and ductility in SFRS design. The Japanese Standard introduces the equivalent flexural strength, which characterizes SFRS toughness and allows...
Single-Shell Shotcrete Method
On a 60-m-long test stretch in the course of the construction of the Munich Subway the single-shell jointless shotcrete method was employed. In this case the standard cross section of...
Two Shotcrete Lined Tunnels in the United Kingdom
The paper describes two large diameter tunnels recently built in southern England where shotcrete has been used as the primary support. The design methodology is described together with...
Adapted Actions Taken at Too Low Shotcrete Quality
A tunnel contract specified quality parameters such as: thickness, compressive strength, adhesive strength, bending tensile strength and residual bending tensile strength for fibre reinforced...
Lattice Girders for Shotcrete Support
Lattice Girders complement the use of shotcrete for underground support by reducing the risk involved with using shotcrete alone for temporary or permanent lining of a tunnel or shaft....
Guidelines and Recommendations on Shotcrete?An International Compilation
Part of the work within the International Tunnelling Association's (ITA) working group Shotcrete Use has been to compile existing guidelines and recommendations concerning shotcrete, particularly...
Recycled Roads
The movement to recycle wastes in highways appears to be gathering momentum nationwide. Rubber from old tires, wood chips, reclaimed asphalt pavement, fly ash, scrap plastic, mining wastes...
Driving Under a Construction Site
Throughout the summer of 1992, vehicles passed unimpeded through one of the most heavily traveled intersections in Los Angeles County as construction proceeded on a concrete light-rail...
Supply-Side Solutions
Although the crumbling bridge infrastructure has received much attention in the press and the engineering community over the past few years, the number of structurally deficient bridges...
What Do You Mean by That?
The engineering and construction profession, like any other, has its own buzzwords and jargon. But as terms become ingrained in the profession's lexicon, they take on different...
Plastic Piling
Composite plastic and steel piles are gaining acceptance throughout the United States. The evolving technology has produced a unique product which solves several problems related to use...
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