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Omprakash Gehlot
Er. Mahendra Saini
Keywords:
Bridge load testing, proof load, deflection recovery, crack width, rebound hammer, ultrasonic pulse velocity, and carbonation depth.
Abstract:
Bridge load trying out is a essential method to evaluate the in-situ overall performance of superstructures and to verify assumptions made in the design segment. The gift take a look at turned into carried out at the superstructure minor bridge span (A1–W1) at Ch.-104 800 for the Beawar–Gomti Section Project on NH-eight, Rajasthan. The proof load check was completed with a complete carried out load of 128 MT, equal to the simulated IRC-designed loading with effect, and retained for twenty-four hours. Deflections have been measured with correction for temperature outcomes, and the results were evaluated in opposition to IRC SP fifty one-2015, IS 14893:2021, IS 516:2018/2021, and different applicable codes.
The percent recuperation of deflection become observed to be greater than 85%, which exceeds the minimal recuperation limits prescribed via IRC SP 51-2015 for all styles of bridges, confirming the adequacy of elastic conduct. The maximum measured deflection of one.342 mm become appreciably decrease than the theoretical permissible restriction of 4.5 mm beneath 70R loading, indicating high stiffness and serviceability. Crack width measurements remained below 0.30 mm, that is within the attractiveness criteria for mild exposure situations.Complementary assessments further verified the integrity and electricity of the shape. Pile integrity exams discovered homogeneous first-rate with no seen bulges or defects, and a pile duration of about 25 m, gratifying IS 14893:2021 necessities. Compressive electricity exams of cubes handed M-50 MPa, with appropriate versions, even as middle assessments confirmed an equivalent electricity above 0.85 fck. Non-negative trying out the usage of the rebound hammer indicated quality consequences within ±25% electricity correlation, and ultrasonic pulse velocity measurements (>four.0 km/s) graded the concrete excellent as right to first-rate. Depth of carbonation was measured among 0.50 mm and 4.Five mm, nicely within the safe limits prescribed by means of IS standards. The trying out confirms the structural adequacy, reliability, and serviceability of the bridge span, thereby validating the design assumptions and ensuring long-time period protection of the structure.
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International Journal of Recent Research and Review
ISSN: 2277-8322
Vol. XVIII, Issue 3
September 2025
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PUBLISHED
September 2025
ISSUE
Vol. XVIII, Issue 3
SECTION
Articles
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