This project is in a major U.S. city for the construction of a large building foundation. The perimeter was “Built on the Project” using a Beam design and tie backs. Footings at a deeper elevation were installed using Slide Rail Systems. This shows that excavation solutions are not limited to one solution. On a complex project such as this contact a NAXSA Member to discuss engineering and construction sequencing. 

You have heard of Super Fund sites and companies that have contaminated their properties and it needs to be cleaned up. Engineers have done studies to determine the extent of the contamination and contractors must excavate, test and replace the contamination with clean soil. You could steel sheet the project perimeter, or you could use the modular Slide Rail System shown in the photo. This method allows the cleanup to proceed in 20’ square pits to varying depths and each pit is “leap frogged” around the site to complete the project. Call a NAXSA Member to receive expert advice regarding this solution. 

Install a jacking pit wide enough next to one of the busiest highways to install three tunnels under the highway. A Slide Rail System was the most cost effective solution because it could be installed quickly, safely and using a small crew. Call a NAXSA Member for engineering and a cost analysis.

This jacking pit is about 26 feet deep in tight area, so a Slide Rail System was used. If there had been more room, stacking steel boxes would have also been a solution. This project required a substantial “push wall” and so that has to be taken into consideration in either solution. Call a NAXSA Member about what system to use, engineering involved and a cost comparison. 

We have a trench box with “High Arch” spreaders for use in a jacking pit. The main focus in this picture is the use of steel plates to close off the end of the box. We assume that the contractor checked this design with the manufacturer. This solution works, but you “must” contact your NAXSA Member Manufacturer to discuss if this can be done to close off the end of the trench this way, and if not, how it can be done. Be Safe!! 

You have a lot of existing utilities, limited lifting capacity and pipe, conduit or electrical to install. If that is the case, then vertical hydraulic shoring is a great solution for your project. Call a NAXSA Member for pricing and availability.

A inner City project that is deep (28 feet), lots of existing utilities, and cast in place structures. This work is labor intensive and will be slow moving. In this case H-Beam and wood lagging was the solution. In another section of the project the structure was changed to precast which led to using a 30 foot deep Triple Slide Rail system for the solution. Details make the difference!! Call a NAXSA Member for engineering and cost analysis.

Building a structure or pipe in a river, lake or the ocean requires a lot of planning, logistics and engineering. A cofferdam installation is shown, which is typical. Cofferdams require that the sheeting be driven below excavation sub-grade so that the water outside of the cofferdam does not flow into the cofferdam by traveling beneath the toe of the sheeting and “boil up” into the cofferdam work area. Call a NAXSA Member to receive a consultation on solutions, engineering and cost analysis.

This project is a tunnel jacking pit, but the same system could be used on a trench project with large diameter pipe. Steel boxes are manufactured with a variety of spreader designs, and depending upon what you are building, there is a spreader design that will work for you. Call a NAXSA Member to go over the steel box for your companies needs.

This photo shows a braced Beam and Steel Plate pit for a cast in place structure. Larger dimensions and the speed with which the concrete work can get done, dictate this type of solution. If the project could be done with precast components then a Slide Rail System might be more cost effective. Call a NAXSA Member for a cost analysis.

A Beam and Steel Plate cantilever support wall is ideal for projects that are in the range of 5-15 feet in depth and cover a large perimeter. The design will depend on the soils, ground water and surcharges. This solution requires Site Specific Engineering, but once installed does not require bracing and can stay in place for long periods of time. Call your NAXSA Member for engineering and prices.