Plate Bearing Tests on Collapsible Soils Improved by Compaction

SAMIR IBRAHIM, SHALABY (2017) Plate Bearing Tests on Collapsible Soils Improved by Compaction. In: Seventh International Conference On Advances in Civil and Structural Engineering - CSE 2017, 01-02 July, 2017, Kuala Lumpur, Malaysia.

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Abstract

Collapsible soils are located in aired and semi-arid regions around the world. Collapsible soils cause remarkable damage to overlying structures. To improve this soil type to allow building, it is necessary to create a compacted replacement top sand layer above this weak, compressible soil stratum to increase its bearing capacity, reduces displacement and changed soil behavior to brittle behavior. In this paper, the influence of using the same collapsing soil compacted at different compaction ratios as a replacement material with different thicknesses on collapse strains is studied using field plate load tests. The paper discusses the mechanisms of this system using a large-scale model footing for a case studies for a housing project in sixth of October city-Giza governorate- Egypt. That site has a collapsible silty sand soil. Circular plates of 750-mm diameter were employed in field tests. The load-settlement were modeled under dry conditions of soil at natural water content of 4% and dry density of 14.5 N/m3. Field plate load test results are presented and their capability in collapse characterization and evaluation are compared. Results of field plate load tests showed that the use of the same collapsing soil compacted at different compaction ratios as a replacement soil had a sensible influence in reducing collapse settlement and increase bearing capacity and get a better performance of shallow foundations on collapsible soils. Critical depth of compacted upper layer is 2.0 times footing width.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: collapsible soil, soil bearing capacity, plate load test, soil improvement, in situ tests , and soil replacement
Depositing User: Mr. John Steve
Date Deposited: 11 Mar 2019 11:30
Last Modified: 11 Mar 2019 11:30
URI: http://publications.theired.org/id/eprint/425

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