Experimental study of estimating the subgrade reaction modulus on jointed rock foundations

Jaehwan Lee; Sangseom Jeong

doi:10.1007/s00603-015-0905-9

Experimental study of estimating the subgrade reaction modulus on jointed rock foundations

Jaehwan Lee, Sangseom Jeong

Department of Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The subgrade reaction modulus for rock foundations under axial loading is investigated by model footing tests. This study focuses on quantifying a new subgrade reaction modulus by considering rock discontinuities. A series of model-scale footing tests are performed to investigate the effects of the unconfined compressive strength, discontinuity spacing and inclination of the rock joint. Based on the experimental results, it is observed that the subgrade reaction modulus of the rock with discontinuities decreases by up to approximately 60 % of intact rock. In addition, it is found that the modulus of subgrade reaction is proportional to the discontinuity spacing, and it decreases gradually within the range of 0°−30° and tends to increase within the range of 30°−90°.

Original language	English
Pages (from-to)	2055-2064
Number of pages	10
Journal	Rock Mechanics and Rock Engineering
Volume	49
Issue number	6
DOIs	https://doi.org/10.1007/s00603-015-0905-9
Publication status	Published - 2016 Jun

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean government (MSIP) (No. 2011-0030040).

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Geotechnical Engineering and Engineering Geology
Geology

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abstract = "The subgrade reaction modulus for rock foundations under axial loading is investigated by model footing tests. This study focuses on quantifying a new subgrade reaction modulus by considering rock discontinuities. A series of model-scale footing tests are performed to investigate the effects of the unconfined compressive strength, discontinuity spacing and inclination of the rock joint. Based on the experimental results, it is observed that the subgrade reaction modulus of the rock with discontinuities decreases by up to approximately 60 % of intact rock. In addition, it is found that the modulus of subgrade reaction is proportional to the discontinuity spacing, and it decreases gradually within the range of 0°−30° and tends to increase within the range of 30°−90°.",

author = "Jaehwan Lee and Sangseom Jeong",

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