Foundation Specifications 0071

Sub Sections: 1 2 3 4 5 6 7 8 9 10 11 12
Pages: 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74

Our techniques apply when adding new structures: especially rock anchor, microfine cement, soil nailing, micropile installations for foundation support. We specialize in slope stabilization, anchors, permeation grouting, foundation repair and support, grouting, soil nails, rock drilling, micropile installations, and sinkholes. We use a problem-solving approach geotechnical architecture of buildings, bridges, water plants, sewage plants, tunnels, sinkholes, caisson, shoring, underpinning, agriculture, and roads construction. We are experienced in these applications: micro piles, sinkhole repair, permeation grouting, pressure grout, soil nails, chemical grouting, micropiles, compaction grout, and rock anchors. Our specialties are rock anchor, acrylamide and compaction grouting, mini piles, sinkhole repair, micropiles, acrylamide grouting, and soil nailing. We will continue to dedicate ourselves to excellence, including insurance mortgage, in our performance, in our integrity, and in our relationships with our customers. We will carefully weigh our decisions, actions, and results to make sure that we remain the most trusted name in the geotechnical contracting industry. Please visit our website http://www.rembco.com/. Add Concrete Construction URL

Cast-In-Drilled-Hole Piles

In the case of problems with groundwater, cave-ins or obstructions at the lower portion of

the hole and under certain conditions, the Standard Specifications allow the Contractor to

propose increasing the pile diameter in order to raise the pile tip. Before allowing this, the

Structure Representative should consult with the Project Designer and Engineering Geolo-

gist to see if this is feasible, and if so, to obtain the revised tip elevation. Appropriate pay

provisions are also included in the contract specifications and a change order is not

Ordinarily, the above problems would stimulate the Contractor’s action and a change would

be proposed to the Structure Representative.

Before drilling begins, it is advisable to have a pre-construction meeting with the Contractor

and any subcontractors that will be involved in the work. Items to be discussed should

include any recently revised contract specifications, the contract pay limits, the Contractor’s

planned method of operation, the equipment to be used, the plan for avoiding existing

utilities (if any), and safety precautions to be taken during the work.

The Structure Representative should review the contract plans, the Foundation Report and

the Log of Test Borings thoroughly. If there are any discrepancies noted between the pile

type shown on the plans, the pile type called for in the Foundation Report, and the soil

materials and groundwater level shown on the Log of Test Borings, the Project Designer

should be contacted for clarification.

Due to recent changes in design practice, it is possible that the pile may not be designed for

end bearing alone. The Project Designer should be contacted to determine whether skin

friction has a role in the capacity of the pile. This is especially true of seismic retrofit

projects, where pile tensile capacity may be a requirement.

The Contractor is required to lay out the pile locations at the site prior to drilling. This

layout should be checked by the Structure Representative prior to drilling. The Structure

Representative should also set reference elevations in the area so pile lengths and pile cutoff

During the drilling operation, the Structure Representative should verify that the piles are

being drilled in the correct location and are plumb. Usually, the Contractor will check the

Kelly bar with a carpenter’s level during the drilling operation. The Structure Representative