The presence of groundwater level (GWL) causes changes in stiffness and strength of soil, affecting the bearing capacity and settlement of shallow foundations. In the present study, the load-carrying capacity and settlement of footings in sands under various GWL conditions were investigated. For this purpose, a series of model footing load tests and cone penetration tests (CPTs) were conducted using the hydraulically controlled chamber system. Different GWL and soil conditions were considered in the tests. The load-carrying capacity of footings became lower with increasing GWL, which was most significant within the depth of GWL (dw) equal to footing width (1.0B). Larger reductions in the bearing capacity with GWL were observed for looser soils with lower relative density. Based on the test results, design equations and correlation parameters for the GWL effects on the bearing capacity and settlement were proposed as a function of GWL, applied load, and relative density. It was confirmed that the existing CPT-based correlations to footing bearing capacity are valid and applicable for soils with GWL.
Bibliographical noteFunding Information:
This work is supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), with grants funded by the government of Korea (MSIP) (Nos. 2011-0030040 and 2013R1A1A2058863).
© 2017 by ASTM International.
All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology