About TBH & Associates
TBH & Associates is a full service drilling, shoring, deep foundation and general engineering contractor located in the Pacific Northwest. We are available to provide our services throughout the United States.
At TBH & Associates, we're dedicated to smart construction and management. Determining the best solution for our customers is our goal. With over 30 years of industry experience, we are committed to providing timely, value-conscious solutions for our clients.
Services
Shotcrete
Shotcrete is pneumatically placed concrete typically ranging in thickness from 2" to 24" thick. It is applied to create a concrete fascia for permanent and temporary earth retention systems.
TBH specializes in sculpted shotcrete. This process, in which the shotcrete is stained and textured to match nearby geologic formations, allows shotcrete to blend seamlessly into the environment. A carved shotcrete structure saves time and provides an attractive, natural looking, yet structurally sound retaining wall.
Drilled Shafts
TBH offers drilled shaft services in: bridge and building foundation support, tower foundations for the power, energy, and utility industry, drainage control systems, landfill drilling and tunnel access shafts.
Case Studies
Soil Nail Walls
Soil Nails consist of closely spaced steel or fiberglass elements installed nearly horizontal as an excavation progresses. Grouting secures the soil nails in place. Soil Nails reinforce the existing ground thereby retaining the natural earth. When combined with a shotcrete facing or a high tensile steel wire mesh, an inexpensive and versatile soil nail wall is created. Soil Nail walls can be constructed in many ground conditions and in areas of limited access.
Aside from schedule and cost advantages, the primary benefit of soil nails is the ability to construct a temporary or permanent wall from the top down, requiring no additional shoring or excavation.
In addition to soil nails, TBH installs rock bolts and driven nail elements. Applications include slope stabilization, permanent or temporary shoring, tunnel and rock face stability.
Micropiles
Micropiles are small diameter piles which may consist of steel casing, steel reinforcement and grout to create high capacity piles with both a vertical and lateral capacity. Micropiles can be installed in limited access locations with little noise or vibration and in various ground conditions including obstructions and contaminated soils.
TBH designs and installs micropiles with diameters ranging from 3 to 12 inches and individual load capacities up to 200+ tons. We specialize in difficult access applications with equipment that can be used in remote locations.
Micropile applications include: tower foundations, seismic retrofit, resisting uplift/dynamic loads, underpinning, limited access support and shoring. Other pile foundation systems installed by TBH include driven pipe and pin piles.
Soldier Piles
Soldier piles are steel wide flange or pipe piles installed vertically into the existing ground to provide either temporary or permanent shoring for a vertical excavation. Depending on soil conditions and vibration requirements, they can either be driven into place or installed in a drilled shaft and backfilled with concrete. Depending on the height of the wall ground anchors can be used to further restrain the piles. Soldier pile walls also have the advantage of allowing a permanent wall structure to be constructed without separate temporary shoring or excavation behind the wall face. The soil between the piles is typically restrained with either wood lagging or shotcrete, allowing for a variety of wall finishes.
Case Studies
Shoring Systems
Shoring systems are installed for temporary and permanent earth retention. TBH specializes in designing and installing custom shoring systems that meet the specific site and budget constraints of each project.
TBH has installed shoring to minimize the quantity of excavation and backfill, to limit size of excavations, to allow construction of deep foundations and structures in limited site footprints, to minimize excavation impacts on adjacent properties, and to create jacking and receiving shafts for tunnel boring operations.
TBH is capable of designing and constructing cost effective shoring systems to meet the project requirements. Traditional shoring methods used are sheet piling, soldier piles with tieback anchors. We also utilize tangent and secant pile walls and ground improvement systems for earth retention.