|Table of Contents|

Numerical simulation of embankment on sloped weak ground reinforced by pile-net structure with collar beam(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2014年06期
Page:
35-43
Research Field:
道路与铁道工程
Publishing date:

Info

Title:
Numerical simulation of embankment on sloped weak ground reinforced by pile-net structure with collar beam
Author(s):
HUANG Bing1; 2; 3; 4;  GENG Jian-yu1; 2; 3;  JIANG Xin1; 2; 3;  LIANG Duo-wei1; 2; 3;  QIU Yan-jun1; 2; 3
1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. Highway Engineering Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 3. Key Laboratory of High-Speed Railway Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 4. Sichuan Chengdenan Expressway Limited Liability Company, Chengdu 610041, Sichuan, China
Keywords:
subgrade engineering;  embankment on sloped weak ground;  pile-net structure with collar beam;  nonlinear finite element;  mechanical response
PACS:
U416.12
DOI:
-
Abstract:
To investigate the working mechanism of pile-net structure with collar beam applied in the embankment on sloped weak ground, the finite element model of embankment on sloped weak ground reinforced by pile-net structure with collar beam was established. Some mechanical responses with or without reinforcement, including potential slip surface behaviors, stability safety factors, geogrid tensions, embankment top surface settlements and ground lateral displacements, were compared. The sensitivities of core design parameters, such as collar beam location type, elastic modulus and thickness, were analyzed. Study result shows that the pile-net structure with collar beam can decrease the embankment maximum settlement, differential settlement and ground lateral deformation by 88.7%, 90.3% and 96.6%, respectively, and improve the stability safety factor by 26.2%. Arranging the collar beam crossbar is beneficial to improve the embankment stability safety and reduce the ground lateral displacement. Decreasing the elastic modulus of collar beam appropriately will not cause relatively large unfavorable effect, and too thin collar beam is not suitable. 2 tabs, 10 figs, 20 refs.

References:

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Last Update: 2014-12-20