Ground Force undertaking an ongoing subcontract to upgrade aviation crash training facilities at seven Military bases across the United States including the states Florida, Washington, Maryland, California.
The Design / Build contract included the coordination and execution of all Structural and Geotechnical Engineering disciplines including the installation and rigging of new Jib crane systems and controls, millwright / dismantling work of existing gantry cranes, and the construction of micropile mat foundations.
Chula Vista, CA – Construction of a 17,000 square foot Soil Nail wall to provide earth retention for the construction of new Clear Well water storage tanks. The wall measured approximately 54 feet at its tallest point. Over 500 cubic yards of Shotcrete was installed in addition to 530 soil nails ranging in length from 25 to 52 feet deep. Excavation for the wall required in excess of 35,000 cubic yards of grading.
This local carwash business had been faced with the duration and expense of constructing both a Shoring Wall and a Cast in Place Concrete Wall. Groundforce was contacted for our expertise in Shoring Walls and the client called us to see about an alternative approach.
Soil Nail Wall Design
We gave them a Design/Build proposal to do the job using a permanent Soil Nail Wall. Groundforce Team are experts with Soil Nail Wall and other retaining wall structures.
Flood control channel construction. A structural concrete municipal project. Work included concrete lining (4,220 cubic yards of Shotcrete), Box Culverts and transition structures (545 Cubic yards of Cast in Place concrete) Reinforcing steel (285,000 lbs.) Rip rap channel protection (2,700 tons), earthwork (28,700 cubic yards), de-watering and storm drainage upgrades.
Here is a collection of some past geotech projects we thought worth noting. We specialize in foundation construction, foundation repair, slope stabilization, and many other geotech and soil engineering services. Groundforce serves the San Diego, Orange County, LA, and Riverside areas.
This is an interesting video showing CAT 259 excavation equipment dropping in on a 1.5 to 1 slope.
The Cat 259 Compact Track Loader, with its vertical lift design, delivers extended reach and lift height for quick and easy truck loading. Its standard, suspended undercarriage system provides superior traction, flotation, stability and speed to work in a wide range of applications and underfoot conditions.
Thought we would share this one from:
Michael Willhite : Owner/Operator at WILLHITE GRADING & EXCAVATION INC.
Soil nailing is a construction remedial measure to treat unstable natural soil slopes or as a construction technique that allows the safe over-steepening of new or existing soil slopes.
Groundforce can be seen here providing down hole hammer drilling in Temecula, CA. Serpentine Soil Nail Walls are challenging to build but look good when they are finished and provide quality support. This one is for an estate site that will have a pool at the base of the wall.
Our drill crew getting rolling on a Tie Back and Shotcrete Retaining Wall Repair in La Mesa. Structural design by Carl Josephson/Josephson-Werdowatz. Geotechnical Engineering by E. David Colbaugh/Evans-Colbaugh and QC/Materials testing by Christian Wheeler Engineering
Here is some fun footage of a job we just wrapped in in San Diego for an apartment project in the Mission Hills area. Groundforce did all of the Soil Nail Wall Work and Grading. Our guys really did a great job on this one. On to the next job!
A projectin Los Angeles, CA consisting of upgrades to existing groundwater and storm water collection systems. Site work included the installation of additional lift stations, waterproofing, urethane grouting, force main piping, electrical controls, and shoring, along with holding and pump chamber installations.
Spring Valley, CA – A roadway improvement project to increase pedestrian safety. Cast in place retaining walls were constructed at existing side slopes to widen the street for sidewalk and curb ramp construction. In addition to the 2700 square foot cast in place retaining wall a 4250 square foot soil nail and shotcrete retaining wall was constructed in order to cut back a slope on the opposite side of the street.
A civil project in Chula Vista, CA appliedbox channel construction as a remedy for flood control. The work included extensive shoring using temporary soil nail walls (4,900 square feet) and storm waterby-pass systems (2,950 lineal feet). Box channel cast-in-place concrete with (3155 cubic yards and 345,000 lbs. of rebar) was installed including 31,600 cubic yards of grading and the addition of 3 pedestrian bridges across the completed channel.
Micropile and foundation underpinning work on a commercial tilt up building in Carlsbad, CA. The building had experienced subsidence of the fill soils that resulted in floor tilt. Project work included the construction of 38 micropilesthat were drilled to depths ranging from 33 to 48 feet. In addition each micropile was capped with a grade beam system to underpin the affected building perimeter foundation.
This project was for a custom home site in La Jolla, CA and included (7,200 cubic yards of grading, and 2,500 cubic yards of imported soil). Other work involved erecting temporary and permanent shoring walls, constructing a caisson pile foundation for masonry retaining walls, and some site drainage and demolition work.
This project involved foundation underpinningwork providing stabilization to 7 homes at the end of a cul de sac in San Diego, CA. Each house was underpinned with cast in place grade beams. The houses were then mechanically jacked level with lifts ranging from 3 to 8 inches using a system of hydraulic jacks and sacrificial screw jacks. A total of 55,000 lbs of rebar were installed. In addition approximately 740 cubic yards of concrete was poured, along with the injection of 65 cubic yards of pressure grout to fill in underneath the lifted slabs.
This was a landsliderepair to a slope that undermined four houses and a swimming pool in Oceanside, CA. The site work included the installation of tie backs(56 anchors with 300 kip loads) and reinforced shotcrete (225 Cubic yards). The project also included slope re-grading (14,000 cubic yards), and the reconstruction of an existing retaining wall.
A turnkey slope stabilization work site behind an estate home in Rancho Santa Fe, CA . The work included the tie back shoring of a wall (36 tie backs with 200 kip loads) to provide support to the house and swimming pool above the slope. A storm and site drainage system was implemented and 12,000 cubic yards of grading and re-vegetation were part of the project on this site.
Slope stabilization and slope repair work at a site in La Jolla Ca involved (10,800 Cubic yards) of grading, and the construction of caissons(48 caissons for slope stability with 36-inch diameters and 56 feet deep). The project included foundation underpinningto provide support for the houses above the slope. In addition were some site drainage repairs.