Topic
Embedment
About: Embedment is a research topic. Over the lifetime, 2441 publications have been published within this topic receiving 31444 citations.
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TL;DR: In this article, a series of laboratory 1-g model test has been carried out on a single instrumented model pile embedded in soft clay (consistency index I − c ≥ 0.42) with different slopes (1V: 1H, 1V: 2H, 3H, 4H, 5H, 6H, 7H and 8H) and embedment length to diameter ratio (L/D = 20, 25 and 30).
Abstract: Pile foundations are often subjected to lateral loads due to various forces on variety of structures like high rise buildings, transmission towers, power stations, offshore structures and highway structures. In the present study, a series of laboratory 1-g model test has been carried out on a single instrumented model pile embedded in soft clay (Consistency index I
c
= 0.42) with different slopes (1V:1H, 1V:2H, 1V:3H and 1V:5H) and embedment length to diameter ratio (L/D = 20, 25 and 30). From the experimental results, new non-dimensional p–y curves (where p is the static soil reaction and y is the pile deflection) due to lateral static loading were developed. Also, effect of slope angles on proposed p–y curves was studied.
17 citations
TL;DR: In this article, the authors investigated embedded pile-to-cap connections for concrete-filled pipe piles in the field under cyclic loading and found that the moment resistance of these connections can be significantly greater than what is typically calculated based on the flexural reinforcement and embedment bearing.
Abstract: For bridges supported by piles, acceptable system performance under seismic loading depends on effective pile-to-cap connections. A fixed pile-to-cap connection is often desirable to help control deflections during lateral loading when soft soils are present. While reinforcement bar cages that extend from the pile into the cap are effective in providing a fixed pile-to-cap connection, it is more economical to rely on pile embedment to provide fixity and moment resistance. This study investigated embedded pile-to-cap connections for concrete-filled pipe piles. Four full-scale specimens, each consisting of a cap with two piles, were investigated in the field under cyclic loading. The specimens had minimal reinforcement and varying amounts of pile embedment. Results show that the moment resistance of pile-to-cap connections can be significantly greater than what is typically calculated based on the flexural reinforcement and embedment bearing. Excess moment capacity may be explained by friction between the p...
17 citations
TL;DR: In this paper, the authors evaluate the seismic behavior of socketed piers with different embedment lengths, and explore the minimum embedment length for designing pier-pile cap socket connections.
17 citations
TL;DR: In this paper, the authors investigated the mechanism of deformation of buried pipe under traffic moving load and the suitability of the modified Spangler-Iowa formula, coupled with the Boussinesq theory of load transmission through elastic media in predicting the deformation.
Abstract: The main aim of this research was to investigate the mechanism of deformation of buried pipe under traffic moving load and the suitability of the modified Spangler-Iowa formula, coupled with the Boussinesq theory of load transmission through elastic media in predicting the deformation of these buried structures. This study employed reduced-scale physical model tests in a geotechnical centrifuge, numerical back-analysis using ABAQUS software and a numerical prediction for a hypothetical case. The hypothetical case consisted of a steel pipe buried in cohesionless soil under moving surface loads. Nine centrifuge tests were carried out for three different embedment ratios in dense, medium and loose sand. The tests results demonstrated that the formulas used for pipeline projects, the modified Spangler-Iowa formula together with the Boussinesq theory, are somewhat conservative for all densities analyzed and that the degree of conservatism increases with both embedment ratio and with the stiffness of the soil the pipe rests.
17 citations
TL;DR: In this paper, a series of experimental and analytical approaches have been adopted to explore the disparity between grouted dowel connections and bar-in-concrete, and an analytical model for predicting the embedment length of the connection was derived, calibrated and proven to be more accurate than state-of-theart design procedures.
Abstract: Owing to its forgiving tolerances and eliminating the need for welding, grouted dowel in-conduit connections are widely used for connecting various precast concrete elements, for instance in precast wall construction and bridge bent cap systems. Current design recommendations for such a connection treat it similar to a conventional reinforcing bar-in-concrete and do not account for the restraining effect of the duct. In the present study, a series of experimental and analytical approaches have been adopted to explore the disparity between grouted dowel connections and bar-in-concrete. The experimental program consisted of testing twenty-four pull-out specimens under monotonic loads. The main parameters investigated included the embedment length, concrete compressive strength and corrugated duct. Results from the experimental and analytical procedures showed that grouted dowel in-conduit connections behave markedly different from bars in concrete. Different failure mechanisms occurred in the grouted connections due to the confinement effect of the duct. Moreover, an increase in load carrying capacity and ductility of the connections was observed at all embedment lengths, regardless of the concrete compressive strength. Based on the experimental findings, an analytical model for predicting the embedment length of the connection was derived, calibrated and proven to be more accurate than state-of-the-art design procedures.
17 citations