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Showing 1 to 20 of 22 for “"Drilled Shafts"”.
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Axial Capacity of Drilled Shafts
Less scatter is demonstrated for shafts in clay versus those in sand. More scatter is apparent for shafts constructed using slurry. Little scatter is shown for cased shafts. No trend is shown for slump, date of construction, or type of drilling tool. No significant effect is found for the rate of …
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Axial behavior of drilled shafts in soft rock
… are transferred to the more competent strata. Drilled shaft foundations are among the most commonly used types of deep foundations. Drilled shafts are often socketed into soft rock formations between near-surface residual soils and the unweathered bedrock that is commonly encountered at greater …
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Lateral load capacity of drilled shafts in jointed rock
… and lateral loads often act on the heads of drilled shafts in jointed rock. In current design practice, the p-y curve method used in design of laterally loaded drilled shafts in soil is adopted in the design of such shafts in jointed rock. The p-y curve method treats the soil as a continuum. …
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Analyis [sic] and design of drilled shafts in rock
Drilled shafts are widely used to transfer heavy structural loads (both axial and lateral) through the overburden soil to the underlying rock mass. It is important to consider the effect of discontinuities when designing drilled shafts in rock. This thesis develops (1) a new design method for …
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Detection of Anomalies In Drilled Shafts Using theImpedance Log Method
… data from impulse response tests performed on 24 drilled shafts constructed with and without anomalies at four National Geotechnical Experimentation Sites (NGES) were used in this study. Initial work focused on deriving the impedance log methodology from first principles and implementing the …
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Axial behavior of drilled shafts socketed into weak Pennsylvanian shales
DSpace SAF Submission Ingestion Package generated from Vireo submission #13215 on 2019-02-07 at 14:22:36
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The use of CPT for calculating axial capacity of drilled shafts
The use of drilled shafts has increased significantly in the last two decades due to their ability to carry large loads economically. Current methods for calculating axial capacity of drilled shafts rely heavily on static methods. The cone penetration test is a simple, fast, and economical test …
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Analysis and design of axially loaded drilled shafts socketed into rock
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Thermal integrity profiling (TIP) and crosshole sonic logging (CSL) testing for drilled shafts
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Thermal integrity profiling (TIP) and crosshole sonic logging (CSL) testing for drilled shafts
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Evaluation of and design considerations for drilled shafts socketed into coral and coquina limestones
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982.
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Load and resistance factor design of drilled shafts in shale using SPT and TCP measurements
… Officials (AASHTO) design methods for design of drilled shafts in shale and other weak rock. These methods are generally based on Load and Resistance Factor Design (LRFD) methods that relate uniaxial compressive strength measurements of rock cores to the side and tip resistance for drilled …
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Evaluation of Scale Effects in Load-Displacement Response of Drilled Shafts Based on Field Load Tests
… information about the nominal resistance of drilled shaft foundations. The application of load testing in drilled shaft foundations provides insight into the load-displacement behavior which can be used to reduce risk, improve reliability and confirm design assumptions. Typically, these tests …
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Load and resistance factor design of drilled shafts subjected to lateral loading at service limit state
… implementing LRFD techniques for design of drilled shaft subjected to lateral loads using reliability-based analysis. On a national level, the AASHTO LRFD Bridge Design Specifications (AASHTO, 2012) specify that a resistance factor of 1.0 be used for design of drilled shafts subjected to …
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Novel Application of Nondestructive Testing to Evaluate Anomalous Conditions in Drilled Shafts and the Geologic Materials Underlying Their Excavations
Drilled shafts are deep foundation elements created by excavating cylindrical shafts into the ground and filling them with concrete. Given the types of structures they support, failure to meet their performance criteria can jeopardize public safety and cause severe financial losses. Consequently, …
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Design methods for deep foundations
… for analyzing laterally loaded piles and drilled shafts. A computer program that can be used to estimate deflections and maximum bending moments in single fixed-head piles (or drilled shafts) and in groups of fixed-head piles (or drilled shafts) was developed. Using this program, charts …
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Full-Scale-Lateral-Load Test of a 1.2 m Diameter Drilled Shaft in Sand
… load tests were performed on two 1.2 m diameter drilled shafts and a 0.324 m diameter steel pipe pile in sand. Although the tests involve two different foundation types, the upper 2.4 m of the profile, which provides the majority of the lateral resistance, consists of sand compacted around both …
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Use of Ultimate Load Theories for Design of Drilled Shaft Sound Wall Foundations
… Department of Transportation for design of drilled shaft sound wall foundations. Field load tests were performed on eight inch and nine inch diameter drilled shafts, and the results were compared to theoretical solutions for ultimate lateral load capacity. Standard Penetration Tests were run …
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ANALYSIS OF THE EFFECTS OF HEAVILY LOADED MAT FOUNDATION ON ADJACENT DRILLED SHAFT FOUNDATION
… Construction of heavily loaded mat adjacent to drilled shafts would cause complex interaction between the foundations. However, lateral stress and drag forces on the shafts resulting from the heavy load on the mat foundation are the two major factors that would affect the design and performance …
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Axial load transfer in large scale physical model drilled shaft foundations
Drilled shaft foundations are a widely implemented type of deep foundation used to support heavy loads from superstructures such as buildings and bridges. Uncertainties exist in the axial load transfer behavior of drilled shafts subject to loading and unloading cycles. A better understanding of the …
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