Foundation Specifications 0123

Sub Sections: 1 2 3 4 5 6 7 8 9 10 11 12
Pages: 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124

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

With double acting steam or air hammers, check the gages for proper pressure during the

driving operation. In addition to measuring the actual stroke, it is important that the blow

Underwater and “closed” system hammers are difficult to inspect and can be throttled by

the operator. The full open position should be used to obtain maximum energy. When

logging piles or determining final blow count, pick a fixed reference point as close to the

pile as practical. This can be accomplished several ways: (1) Mark the lower part of the

leads with one foot marks and observe passage of a fixed point of the pile, or (2) Mark the

pile with one foot marks and note the blows passing a fixed point near the pile (leads,

reference point, lath driven near the pile, water surface or other). Site conditions often

dictate how this is done, so improvise as necessary. Modifications must also be made to

obtain blow counts over smaller increments.

If a precast pile is undergoing hard driving and suddenly experiences a sudden drop or

movement, this could indicate a fracture of the pile below ground. Driving should stop and

an investigation of the soundness of the pile should be made. Piles which are damaged

should be extracted. However, this is not always possible. Frequently this problem is solved

by driving a “replacement” pile next to the rejected one. When this is done the effect of the

change could impact the footing design.

When driving hollow pipe piles in water, be aware of the water level in the pile. Water

hammer developed during driving could split the pile. This may require that the Contractor

seat the pile and stop driving long enough to pump it dry before continuing the drive.

Beware if water gets close to the pile top! Another problem with pipe piles has to do with

what is called a soil plug. When driving hollow piles, there is a tendency for the soil to plug

within the pile as it is being driven. This is common in cohesive materials. When this does

occur the pile will drive as if it is a displacement pile. There are many implications if this

happens. Among the possibilities include the possible overstressing of a pile as well as

misleading blow counts.

Problems with driving can vary in nature and cause. In general there are three categories of

problems: (1) hard driving, (2) easy driving, and (3) pile alignment. The causes typically

are either the soil is too hard or soft, the type of hammer used is inappropriate for the soils

encountered, or the pile type being used is inappropriate. The following is an outline of