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This paper presents the details and preliminary results of full-scale lateral load tests on drive... more This paper presents the details and preliminary results of full-scale lateral load tests on driven piles in Bangkok clay. Close-ended steel pipe piles of moderate size were installed into soft Bangkok clay. Strain gauges were attached on the surfaces of the piles at various locations along their length. The strain gauge outputs were employed to determine pile bending moments, deflections and external soil reactions. Lateral loads up to 10 ton were applied to these test piles. Maximum head displacements between 98-115 mm were observed. The locations of maximum moments shifted to greater depths with increasing lateral load, but they never exceeded a depth of 12B below the ground surface. The computer program LPILE with Matlock’s p-y model for soft clay over-predicted the actual load-head displacement relations. The Characteristic Load Method, however, predicted overly conservative values of head displacement, particularly for large magnitudes of lateral load.
This paper presents the details and preliminary results of full-scale lateral load tests on drive... more This paper presents the details and preliminary results of full-scale lateral load tests on driven piles in soft Bangkok clay. Steel pipe piles with a diameter of 0.25 m and a depth of 12.5 m were instrumented with strain gauges at various depths. Load tests were performed to large pile displacements. Based on the framework of elastic beam on foundation, the strain gauge outputs were employed to determine pile bending moments, deflections and soil reactions. These calculated pile deflections were validated by means of the results of inclinometer measurements during the course of testing. The experimental pile responses were compared to the numerical predictions of the computer program LPILE. It was found that the numerical model predicted unrealistically stiff load-deflection behavior. The reason was likely the use of Matlock \( p - y \) model for soft clay which significantly overestimated the experimental \( p - y \) relationships of Bangkok clay particularly near the ground surface.
This paper presents the details and preliminary results of full-scale lateral load tests on drive... more This paper presents the details and preliminary results of full-scale lateral load tests on driven piles in Bangkok clay. Close-ended steel pipe piles of moderate size were installed into soft Bangkok clay. Strain gauges were attached on the surfaces of the piles at various locations along their length. The strain gauge outputs were employed to determine pile bending moments, deflections and external soil reactions. Lateral loads up to 10 ton were applied to these test piles. Maximum head displacements between 98-115 mm were observed. The locations of maximum moments shifted to greater depths with increasing lateral load, but they never exceeded a depth of 12B below the ground surface. The computer program LPILE with Matlock’s p-y model for soft clay over-predicted the actual load-head displacement relations. The Characteristic Load Method, however, predicted overly conservative values of head displacement, particularly for large magnitudes of lateral load.
This paper presents the details and preliminary results of full-scale lateral load tests on drive... more This paper presents the details and preliminary results of full-scale lateral load tests on driven piles in soft Bangkok clay. Steel pipe piles with a diameter of 0.25 m and a depth of 12.5 m were instrumented with strain gauges at various depths. Load tests were performed to large pile displacements. Based on the framework of elastic beam on foundation, the strain gauge outputs were employed to determine pile bending moments, deflections and soil reactions. These calculated pile deflections were validated by means of the results of inclinometer measurements during the course of testing. The experimental pile responses were compared to the numerical predictions of the computer program LPILE. It was found that the numerical model predicted unrealistically stiff load-deflection behavior. The reason was likely the use of Matlock \( p - y \) model for soft clay which significantly overestimated the experimental \( p - y \) relationships of Bangkok clay particularly near the ground surface.