Soil nailing has become a popular method to shore exca-vations and to build retaining walls due to its versatility and cost effectiveness. Generally broken into two cat-egories, temporary and permanent ground retention systems, soil nailing has evolved into many variations. A range of dif-ferent means and methods have emerged, giving the construc-tion industry an incredibly adaptable shoring system. The im-portance of a well-seasoned soil-nail team, however, cannot be understated for the success of any project.
Temporary soil nailing is the system that utilizes the nail for a limited time during construction process for ground support. Once the permanent structure is in place, the nails are essentially aban-doned. By contrast, permanent soil nails remain in service for the life of the wall. The shotcrete application required during the shor-ing process can also be temporary or permanent, but not necessar-ily the same as the nail. Hence, a temporary facing may be con-structed with permanent nails or vice versa.
Typically, in basement construction, soil nailing is used as a temporary shoring system and is installed concurrently with the excavation for the basement walls. After the basement has been excavated and the soil nail system is in place, either a mat slab or footings are poured and a permanent cast-in-place con-crete or shotcrete wall is installed. If a shotcrete wall is cho-sen, it can be installed with many different finishes to fit the use of the structure. Typically, shotcrete basement walls are fin-ished with wood or rubber floats to create a sand finish. In tem-porary soil nailed walls, the structural floors and walls are in-stalled; the soil nailing retention system is no longer needed to support the walls. In some cases, the wall is installed in a top down manner concurrent with the soil nail anchor installation, in both temporary and permanent shoring systems.
In the past, the highway departments often utilized the per-manent soil nail wall system with shotcrete lagging, covered with a cast-in-place or precast facing to give the completed wall a cast-in-place look. Now, however, permanent soil nailed walls are being used extensively along West Coast highways and freeways.
Although materials, equipment, and methods vary greatly, soil nail retaining wall construction involves variations of the following very basic steps:
Grain Silo Rupture Repair
Barlett & Co. faced a huge cleanup job at its 6.9 million-bushel trail terminal in Wichita, Kanasas in the fall of 1999. A grain silo in diameter and tall holding roughly 150,000 bushels.
Designing and Installing a Shotcrete Strengthening Application on the Spokane Street Bridge
The Spokane Steet Bridge connects the community of West Seattle to downtown via Highway 99 and Interstate south of the city center. The bridge was not originally and constructed to handle is present-day usage consequently.
Use of Synthetic Fiber-Reinforced Dry-Mix Shotcrete for the Rehabilitation of a Wharf in Northeast Quebec, Canada
Understanding and Controlling Shrinkage and Cracking in Shotcrete
Shrinkage is a potential problem in shotcrete construction that can lead to restrained shrinkage cracking.
Cheap Insurance
Cheap Insurance: Most of us in the shotcrete industry have had a plugged hose creating either a dust storm with the dry process or concrete over-spray everywhere with the wet process. When a hose is plugged, it has been my experience that everybody on the crew starts yelling and running toward the operator. Communication between the nozzleman and the gun/pump operator is one of the most important and critical links on the job for productivity, and most of all, safety for everyone. Unfortunately, because of different job site layouts, continual rotation of people, and equipment movement on and around the job site, good communication is often difï¬ cult to achieve or maintain.
Development of Durable Dry-Mix Shotcrete in Quebec
Shotcrete has been widely used by the Ministere de Transports du Quebec for restoration and rehabilitation. Shotcrete has been widely used by the Ministere de Transports du Quebec for restoration and rehabilitation.
Exposed Aggregate Shotcrete: New Shotcrete Finish Improves Aesthetics
Quebec city possesses a historic arc.a in which many concrete structures need repair. For economic as well as practka] reasons. since some of these structures are curved. shotcrete is the logical solution when a repair is considered. In order to provide attractive looking finishes for the re paired structures, ii was decided to see if it was possible to obtain a better finish apÂpearance than the usual wood trowel shotcrete finish.
Enhancing Our Environment with Artificial Rockwork
Shotcrete that can enhance a project aesthetically, structurally. or both. The strength and durability of shotcrete have been combined with the naturally
pleasing apple.1r.111ce of rockworl< to make a visually appealing structure in a natural setting.
The Shotcrete Troll
Mr. lvo Caprino was the artist behind the idea and the sculpturing of the troll. He also produced the head of the troll, which is made of glass liner and polyester.
its body was pre,and as a Ligh1 wood frame, which was covered by a reinforced plastic shec1 fixed to the wooden frame by staples. On top of this. three layers of hot¢ dip galvanized chicken mc$h were installed. Staples weresho1 into the wooden frame to tie down and tighten the layers of mesh.