อิทธิพลของน้ำต่อค่ากำลังรับน้ำหนักของฐานรากเข็มพืด

Abstract

This research is to study the effect of water level on the capacity of sheet pile foundation. The sheet pile foundation is a shallow footing that is skirted by sheet piles around the periphery. From the previous study, it was indicated that sheet pile can dramatically improve the vertical, horizontal and moment capacities of the existing shallow foundation. This study was performed in the laboratory by using 1g physical modeling test. Equipment was newly designed and developed in order to study the sheet pile foundation’s behavior. The test was only focused on the vertical capacity of model foundation resting on sand. The ground models in all same conditions were prepared in the container tank by the pluviation for comparison purpose. The effects of water level on the load capacity were studied by conducting two different experiment conditions; 1) waiting for 24 hours until the sand particles had been completely rearranged under the effect of water level and 2) testing immediately after the targeted water level was reached. The results reveal that both the location of water level and the time before performing the loading test primarily affect the bearing capacity of sheet pile foundation. The details of testing results were also discussed in this paper.