Investigation of the effect of Hammer radius parameters and number of impact on soil improvement by dynamic density method In line with the construction of offshore structures

Bakhtiari, Morteza; Kamal Pour Asl, Ehsan; Ahadiyan, Javad

doi:10.22113/jmst.2018.100314.2060

Investigation of the effect of Hammer radius parameters and number of impact on soil improvement by dynamic density method In line with the construction of offshore structures

Document Type : Original Manuscript

Authors

Morteza Bakhtiari ¹

Ehsan Kamal pour asl ¹

Javad Ahadiyan ²

¹ Marine Engineering Faculty, Khorramshahr University of Marine Science and Technology

² shahid chamran university of ahvaz

10.22113/jmst.2018.100314.2060

Abstract

There is a different method for increasing the resistance and quality of engineering of soils, one of the most suitable ones is dynamic compaction. In this method, weights are released from the specified height and, as a result of collision with the ground, the soil will be compacted. In this research, field experiments were initially initiated. Then using the results obtained in this section, the soil dynamic compaction was modeled. In order to do the modeling, the present study was conducted using FLAC two-dimensional software. Due to the implementation of various designs in the city of Abadan, the area was selected as the site of the project After field experiments, mechanical properties of the soil were extracted and then modeled with the definition of test patterns. The result of this research show that For all conditions of modeling, the maximum deformation of soil was observed in the hammer Cutoff area, which decreased in depth of soil. Also, the results indicate that effective stress in soil under dynamic density decreases with increasing depth.

Keywords

Dynamic compaction

radius of hammer

Flac software

Soil Improvement

20.1001.1.20088965.1398.18.4.6.8

Subjects

مهندسی سواحل

Al-Layla, M. T., & Al-Saffar, Q. N. 2014. Improving The Engineering Properties of The Gypseous Soil Using Dynamic Compaction Method. Al-Rafidain Engineering Journal, 22(2).

Chow,Y.K., Yong, D. M., Yong, K. Y., Lee, S. L.1990. Monitoring of dynamic compaction by deceleration measurements”, Computers and Geotechnics, Vol.90, No.3, 1990, PP.189-209.

FLAC's Manual. Itasca Consulting Group, Inc. Thresher Square East, 708 South Third Street, Suite 310, Minneapolis, Minnesota 55415 USA.

Gu, Q., Lee, F.H. 2002. Ground response to dynamiccompaction of dry sand. Geotechnique, Vol 52, No7,481-493.

Hamidi, B., Nikraz, H., & Varaksin, S. 2010. Correlations between CPT and PMT at a Dynamic Compaction Project. In Proceedings of 2nd International Symposium on Cone Penetration Testing, U.S.A.

Hamidi, B., Varaksin, S. & Nikraz, H.2010. Predicting Soil Parameters by Modelling Dynamic Compaction Induced Subsidence’, 6th Australasian Congress on Applied Mechanics (ACAM6), Perth, Australia, 12-15 December, paper 1150.

Pan, J.L., Selby, A.R. 2002. Simulation of dynamic compaction of loose granular soils. Advances in Engineering Software 33, 631-640.

Poran,C.J., Rodriguez,J.A. 1992. Finite Element Analysis of Impact Behavior of Sand. Soils and Foundations, Vol 23, No 4, 68-80.