Journal Published Online: 02 February 2021
Volume 49, Issue 6

Experimental Study on Embankment Failure Law and Reinforcement Technology for Highway Widening Project over Silt Soils

CODEN: JTEVAB

Abstract

In the highway widening project, it is of great importance to take measures to control the differential settlement between the new and old embankment, therefore improving the stability of the new embankment. This article presents a series of model tests to analyze the failure law of the new embankment and compare the reinforcement effects of different reinforcement technologies. The test results show that the new embankment is unstable because of the slope slippage under ultimate load. In the reinforcement test of gravel pile, reaming phenomenon occurred at the top of the pile, and both of the values in pavement settlement and embankment lateral deformation are similar to those of the unreinforced embankment. In the geogrid reinforcement test, the embankment settlement can be reduced by restricting the lateral deformation of the new embankment with geogrid, where the settlement is 41 % less than that of the unreinforced scenario. In the cement fly ash gravel (CFG) reinforcement test, the pavement load is transferred to a deeper layer of the embankment by CFG piles, a soil arch effect with the surrounding soil is formed to restrict the lateral deformation and slippage, and the pavement settlement is 46 % less than that of the unreinforced scenario. According to the test results, the order of effectiveness for the reinforcement methods is CFG piles > geogrid > gravel pile.

Author Information

Lv, Gao-hang
School of Civil Engineering, Shandong University, Jinan, China
Cui, Wei
School of Qilu Transportation, Shandong University, Jinan, China
Zhang, Qian-qing
Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, China
Wu, Shi-qian
Shandong Luqiao Group Co., Ltd., Jinan, Shandong, China
Wang, Shu-jian
Shandong Luqiao Group Co., Ltd., Jinan, Shandong, China
Pages: 13
Price: $25.00
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Details
Stock #: JTE20200429
ISSN: 0090-3973
DOI: 10.1520/JTE20200429