Browsing by Autor "V.H.M. Challapa"

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Behavior analysis of post-grouted micropiles in clay soils from tension load test results
(European Organization for Nuclear Research, 2022) V.H.M. Challapa; Camacho Peña; Camacho Peña
The design of micropiles is carried out through semi - empirical equations developed from field tests and previous experiences. This design represents an approximation of the real soil - micropile behavior and generates uncertainty since the design involves the ultimate micropile bond strength which is selected as a function of the type of micropile and soil characteristics and presents a broad range of values leading to a wide range of micropile resistances for the same conditions. Therefore, the standards recommend verifying and determining the field capacity of the micropile designed by static load tests, which are real-scale tests that allow knowing the field behavior between the built micropile and the ground. In the present paper, the analysis of the behavior of three different type D post-grouted micropiles was carried out through the results of static tension load tests following the FHWA NHI-05-039 "Micropile Design and Construction" standard, the geotechnical characteristics of the area were considered in the verification of the design and with the results of the load tests an analysis of the acceptance criteria recommended in the aforementioned standard was performed.