2010 fhwa drilled shaft manual muscle tester

Drilled shafts, handbook on design and construction of drilled. Development of a database for drilled shaft foundation testing. Twentysix drilled shaft tests collected from previous research ltrc final report 449 and eight new drilled shaft tests were selected for statistical reliability analysis. Program management florida department of transportation. Instrumented static load test on micropile socketed into. Handbook on design and construction of drilled shafts under lateral load 1984. The osterberg cell for load testing drilled shafts and driven piles 1994. Thermal integrity testing tip for drilled shafts university of missouriuniversity of illinois interpretation of crosshole sonic logging csl for drilled.

Construction procedures and design methods, lovingly referred to in the industry as the brown book or the drilled shaft bible. Cell testing, coring, cross hole sonic logging, and other nondestructive testing. Workshop on quality assurance for postgrouted drilled shafts. Fhwa cpt workshoppractical experiences using the cptseptember 2015 indianapolis, ingerald verbeek. Drilled shafts are an alternate type of deep foundation that may be more cost effective and perform better than other types of deep foundations in bridge piers at river crossings and in retrofit operations, highmast lighting, earth retaining structures, single. Fhwa nhi10016, may 2010 in the following paper, no distinction will be made between conventional drilled shafts and cfa piles, as basic concepts of pile capacity estimation applies to both drilled shaft and cfa pile. The participants will receive a comprehensive reference manual on drilled shaft construction and design used by engineers who perform detailed designs of drilled shafts, write construction specifications. Drillef shaft manual fhwa nhi 10 016 casing borehole concrete. Drilled shafts, handbook on design and construction of drilled shafts. Development of preliminary load and resistance factor. Instrumented static load test on micropile socketed into limestone conference paper in geotechnical special publication february 2014 with 22 reads how we measure reads. It is the national standard in 33 european countries since 2010. Grl was contacted to perform a bidirectional static load test bdslt on a representative test shaft. Geotechnical manual 24 txdot 032018 chapter 2 soil surveys section 1 soil surveys if boring information varies significantly from one side of the channel to the other, a boring in the.

Load transfer for drilled shafts in intermediate geomaterials 1995. The following sections and figures from the fhwa drilled shaft. Cbear bearing capacity analysis of shallow foundations users manual, fhwa sa94035 the osterberg cell for load testing drilled shafts and driven piles fhwa hi95038 geosynthetic design and construction guidelines fhwa rd95172 load transfer for drilled shafts in intermediate geomaterials fhwa rd96016 thru 019 drilled and grouted micropiles. This 2010 manual from the national highway institute nhi of the fhwa is entitled drilled shafts. The longterm performance of a drilled shaft retaining. Drilled shaft foundation inspection manual drilled shaft foundation inspection manual. Kr00 1870trn drilled shaft bridge foundation design parameters and procedures for bearing in sgc soils 6. Cbear bearing capacity analysis of shallow foundations. Quantitative assessment of drilled shafts basecleanliness using. The 1988 and 1999 editions of the fhwa drilled shaft manual do not contain mechanisticbased design methods and the empirical methodologies may be overconservative for drilled shafts in dense sands and gravels, which are common soils in desert and semiarid regions. Drilled shaft diameters can range from 1 to 10 feet, and lengths up to 150 feet can be achieved using common drilled shaft construction equipment. A unified design equation for cylindrical drilled shafts.

Drilled shaft foundation construction inspection reference manual. Fhwa cpt workshoppractical experiences using the cpt. Chapter 14 specialty piles and special considerations. March 46, 2010, in orlando, fl, 20, fhwahrt11037, view pdf. Standard test method for unconfined compressive strength of intact rock core specimens. These guidelines along with the drilled shaft inspectors manual, prepared by adsc. A drilled shaft transfers load friction and point bearing shafts with or without bells are. As a general reference, gec10, the fhwa drilled shafts manual by brown et al. Development of a database for drilled shaft foundation testing dshaft, june 2012. Materials manufactured expressly for use as polymer slurry for drilled shafts that meet the requirements of this section may be used as slurry for drilled shaft excavations. In addition to serving as a manual for dshaft and providing a summary of the available data, this report provides a preliminary analysis of the load test data from iowa, and will open up opportunities for others to share their data through this quality. The existing 2lane russell street bridge in missoula, montana, a major highway with high traffic volume, was in need of reconstruction. Drilled shafts construction procedures and lrfd design methods, date.

Spr 9000rb01010, development of a database for drilled. Practices for design of bored piles drilled shafts. Figures courtesy of fhwa nhi 2070 drilled shaft foundation inspection course. To identify bridge substructure performance issues. About programs resources briefing room contact search fhwa facebook twitter youtube flickr linkedin. Construction procedures procedures and lrfd design methods and was authored by dan a. Two examples from the fhwa manual 1999 by oneill and reese are provided. Should the fhwa discover that the qualification testing was flawed, that inservice. Drilled shafts construction procedures and design methods 1999 download drilled shafts construction procedures and design methods 1999 publication no. Title and subtitle the longterm performance of a drilled shaft retaining wall in an expansive clay 5. Conforms with current fhwa controlling criteria and establishes new state design criteria for transit provisions and ramp length. Construction procedures and lrfd design methods geotechnical. This chapter provides information on specialty piles and special considerations for pile foundations.

The fhwa accepts pendulum tests as surrogates for this lowspeed small car test. Bolognesi and moretto 1973 documented one of the first uses of postgrouting for drilled shafts. Guidance manual and training development geotechnical monitoring and risk management. The additional capacity is a result of the size of the drilled shaft. Kam ng jessica garder sri sritharan jeramy ashlock. The fhwa has released for download a comprehensive update to the 1999 oneil and reese manual drilled shafts. Polymer slurry poducts for drilled shaft construction. These guidelines and associated drawings will be incorporated into the massdot bridge manual. Select drilled shaft foundations for further evaluation 8. Drilled shafts installed in lakes or rivers require use of a casing placed from above the water surface to a minimum embedment into the river or lake bottom. The 52 primary tool described by the fhwa is the miniature shaft inspection device 53. The test shaft had a diameter of 71 inches, and a length of 75 feet. Construction procedures and design methods, fhwa if99025 and again in the latest update to the fhwa drilled shaft course.

Since that time, a compilation of research on the subject of group reduction factors for drilled shaft foundations was published in the updated fhwa drilled shaft course manual oneill and reese, 1999, drilled shafts. Alternative piling, continuous flight auger piling and other pile types that are under consideration for use by caltrans. Get gec 10 the fhwa drilled shaft manual click image for a final draft get the nchrp synthesis 478 design and load testing of large diameter openended driven piles. As in any foundation, drilled shafts must be designed to carry dead and live load, and be stable enough to resist the forces of wind, water current and the effects of scour and moisture changes in the soil. Construction procedures and lfrd design methods fhwa may 2010. Publications for this functional area are listed below. Lateral load testing of drilled shafts for cable barriers. Construction procedures and lrfd design methods update and revision of nhi manual by o. Development of a database for drilled shaft foundation. The drilled shaft concrete anchor is 457 mm 18 in in diameter and is 1,829 mm 72 in deep. It is very unusual to do a load test on a drilled shaft. Drilled shaft bridge foundation design parameters and.

Strength limit states for drilled shafts lateral geotechnical resistance of soil and rock stratum, for single shafts and shaft groups geotechnical axial resistance compression and uplift, for single shafts and shaft groups structural resistance of shafts, including. Federal highway administration fhwa, publication on drilled shaft foundations publication no. Shaft is a computer program used to evaluate the axial capacity and the shortterm, loadsettlement curves of drilled shafts or bored piles in various types of soils. Construction using casing through slurryfilled starter hole. Tunnel inspection and testing protocol for roadways covered by. July 7, 2010 robert thompson although i have known for several weeks that the manual was finished i work for one of the authors, after all. As a gener50 al reference, the fhwa drilled shaft manual 1 lists the tools commonly available 51 in 2010 for quality assurance purposes, including the shaft base cleanliness. This 2010 manual from the national highway institute nhi of the fhwa is entitled. Develop and execute subsurface exploration and laboratory testing program for.

Specific task training program drilled shaft foundation construction inspection s32. Publications federal highway administration fhwa us. In general, the majority of axial capacity methods used by shaft are based on the latest fhwa manual. Evaluation and guidance development for postgrouted. In general, drilled shafts will have a higher resistance against axial and lateral loads than driven piles. Specifications, inspection, integrity testing, field loading. Assessment of rock strength from measuring while drilling shafts in. Evaluation and guidance development for postgrouted drilled shafts for highways 2017. As a continuing effort to implement the lrfd design methodology for deep foundations in louisiana, this report will present the reliabilitybased analyses for the calibration of the resistance factor for lrfd design of axially loaded drilled shafts using brown et al. In addition to serving as a manual for dshaft and providing a. Pile foundations, centrifugal testing of model piles and pile groups, 1984. This manual embraces both construction and design of drilled shafts, and addresses the following topics.

Construction procedures and design methods, august 1999 fhwa nhi01031 subsurface investigations geotechnical site characterization reference manual, may 2002 fhwa nhi05042 design and construction of driven pile foundations volume. The group reduction factors for bearing resistance of shafts for the. Drilled shafts are deep foundations critical in transportation engineering. Establish minimum diameter and depth for lateral loads. Thus, only the shaft thickness and heights were altered. Do not define the top of the drilled shaft in the normal manner a set distance below finished grade. Hole is drilled slurry level maintained at the ground surface cuttings and sand, is circulated to the surface, where it is cleaned and reintroduced down the hole. An investigation of load and resistance factor design of. Download citation a unified design equation for cylindrical drilled shafts in compression the 1988 edition of the fhwa drilled shaft manual provides equations for drilled shafts in compression. The long anticipated update to fhwa gec 10 drilled shafts. Deployment of the geosynthetic reinforced soil integrated bridge system from 2011 to 2017, synthesis report 2017.