This Reference Specification covers requirements for drilled pier construction and applies to drilled piers of 30 in. ( mm) diameter and larger. The Contractor. ACI – Specifications for the Construction of Drilled Piers – Download as PDF File .pdf), Text File .txt) or read online. ACI Reference Specification for the Construction of Drilled Piers. standard by American Concrete Institute, 01/01/ View all.
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The concrete supplier provides quality control of the mixture sent to the site, making periodic cylinders for strength testing. Reviews User-contributed reviews Add a review and share your thoughts with other readers. 336.1
The name field is required. Normally, the constructed pier diameter will equal or exceed 3336.1 design pier diameter because the drill tools typically drill a slightly oversized shaft due to minor scraping as the tools come in and out of the pier. You may have already requested this item. All aspects of the procedures outlined for withdrawing temporary casing are critically important whenever xci is the potential for an excessive water or slurry pressure head outside of the casing.
Write a review Rate this item: SI units given in parenthesis are for informational purposes only. The geotechnical engineer feels the probe hole wall by lowering and raising a hooked rod. If you are a seller for this product, would 336.1 like to suggest updates through wci support? Because high sand content in the slurry can be the cause of pier defects if the sand settles out of the slurry during concreting, some researchers recommend maintaining the same maximum sand content requirements for both side-resistance and end-bearing designed piers.
Bearing stratum—The soil or rock stratum that carries the load transferred to it by a drilled pier. The volume of concrete pump stroke can be calculated and verified by a field test.
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Amazon Second Chance Pass it on, trade it in, give it a second life. The role of quality assurance is to reduce the probability of defects in the drilled piers.
Pig—Device inserted into a tremie or pump pipe to separate the concrete from the pier excavation fluid inside the pipe. This is particularly true in variable soil and rock deposits, and where isolated individual tests can be misleading. In these cases, additional specified procedures are advisable to minimize the likelihood of undetected defects of significant magnitude. If not in agreement, the Inspecting Geotechnical Engineer should either turn down the assignment or recommend new design parameters and a new basis for the design with the agreement of the Design Structural Engineer.
If an unplanned cold joint occurs, see Section 3. Drilled pier—A foundation element, with or without an enlarged bearing area, extended downward by drilling through earth materials, water, or both, to an acceptable design depth and filled with structural concrete.
Although the requirements for cleaning the bottom of the excavation for side resistance piers is not as strict as that for end-bearing piers, small amounts of sediment, if mixed with the concrete, can 36.1 in a significant lowering of concrete strength.
Field tests and observations should be interpreted and correlated with design assumptions and the experience level of the Geotechnical Axi.
/R Reference Specifications for the Construction of Drilled Piers and Commentary
Specify unique contract requirements. The mandatory checklist requirements indicate Work requirements regarding specific qualities, procedures, materials, and performance criteria that are not defined in the ACI Specification Specify location variation if different from specification. The earth and groundwater conditions may be different from those described in the subsurface investigation.
The center at the aco shall be determined in the same manner as for the center at cut-off. Inspection and testing will be done using the criteria set forth in the Contract Documents. Free-fall concrete placed into as much as 6 in.
ACI Specification for the Construction_百度文库
One is when a permanent steel casing has been inserted in an oversized hole that might cave and avi against the casing so that the amount of void space cannot be observed.
There is a growing trend to find alternatives to down-hole entry for safety reasons. In addition to strength, acu other principal characteristics are fluidity, nominal maximum aggregate size, and setting time. Your rating has been recorded.
Building codes set minimum requirements necessary to protect the public.