Improvement in physical properties for ground treated with rapid impact compaction
Document Type
Article
Publication Date
1-1-2011
Abstract
Ground improvement has been used on many construction sites to densify granular material, in other word to improve soil properties and reduce potential settlement. This paper evaluates the efficiency of rapid impact compaction (RIC), which is an improvement on the process of deep dynamic compaction, in improving soil properties and controlling soil settlement. In this technique ground improvement is achieved by impacting the ground with a 7 ton weight, 35 times/min, and drop height of 0.8 m at 2.5 m c/c square grid spacing. Evaluation of improvement in soil properties was based on field data by comparing pre-treatment and post-treatment cone penetrometer test (CPT) soundings. An interpretation of soil properties from CPT was made using interpretation software to assess the degree of improvement achieved. Load test was conducted to estimate soil settlement. It was found that the RIC succeeded in improving soil properties like relative density from 45 to 70, increase the friction angle of soil by an average of 3° and reducing soil settlement criteria by 50.
Keywords
Cone penetration test, Granular soils, Ground improvement, Improvement depth, In-situ testing, Load test, Physical properties, Rapid impact compaction (RIC), Soil compaction, Soil settlement
Divisions
fac_eng
Publication Title
International Journal of Physical Sciences
Volume
6
Issue
22
Additional Information
Export Date: 16 December 2013 Source: Scopus Language of Original Document: English Correspondence Address: Mohammed, M. M.; Department of Civil Engineering, Faculty of Engineering, University of MalayaMalaysia; email: malmudarris@yahoo.com References: Charels, J.A., Watts, K.S., (2002) Treated Ground Engineering Properties and Performance, pp. C572. , London: CIRIA; Kristiansen, H., Davies, M., (2004) Ground Improvement Using Rapid Impact Compaction, p. 496. , 13th World Conference On Earthquake Eng Vancouver, B.C. Canada; Lunne, T., Robertson, P.K., Powell, J.J.M., Cone penetration test in geotechnical practice (1997) Blacker Acad. Prof, p. 312; Mohammed, M., Roslan, H., Firas, A.S., Effective Improvement Depth for Ground Treated with Rapid Impact Compaction (2010) Sci. Res. Essays, 5 (18), pp. 2686-2693; (2007) Cone Penetration Test, , National Cooperative Highway Research Program (NCHRP), SYNTHESIS 368, Georgia Inst. Technol., Atlanta, Georgia; Schmertmann, J.H., Static cone to compute static settlement over sand. American Society of Civil Engineers, ASCE (1970) J. Soil Mech. Found. Eng, 96 (3), pp. 1011-1043; Tan, B.K., Bachelor, B., Foundation problems in limestone areas - a case study in Kuala Lumpur, Malaysia (1981) Proc. Int. Symp, 3, pp. 1461-1463. , Weak Rock, Tokyo