|Table of Contents|

Internal Force Calculation Method of Soil-steel H-pile Considering Unbalanced Earth Pressure of Backfill Behind Abutment in Integral Abutment Jointless Bridges(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年01期
Page:
125-133
Research Field:
基础工程
Publishing date:

Info

Title:
Internal Force Calculation Method of Soil-steel H-pile Considering Unbalanced Earth Pressure of Backfill Behind Abutment in Integral Abutment Jointless Bridges
Author(s):
SHAN Yu-lin1; 2;  HUANG Fu-yun1;  ZHOU Gui-ji3;  YI Zhi-hong3;  CHEN Bao-chun1
(1. College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China; 2. School of Civil Engineering, Southeast University, Nanjing 211189, Jiangsu, China; 3. Sichuan Highway Planning, Survey, Design and Research Institute Ltd., Chengdu 610041, Sichuan, China)
Keywords:
bridge engineering;  integral abutment jointless bridge;  unbalanced earth pressure;  soil-abutment-steel H-pile interaction;  internal force calculation method
PACS:
TU473
DOI:
10.19815/j.jace.2021.04029
Abstract:
Based on test of soil-abutment-steel H-pile interaction under unbalanced earth pressure and soil-abutment-steel H-pile interaction under larger unbalanced earth pressure(the uniform backfill load increase of 3.81 kPa behind abutment), the internal force calculation method of soil-steel H-pile interaction considering the unbalanced earth pressure of backfill behind abutment was given in integral abutment jointless bridges(IAJBs). The bending moment and shear force of abutment bottom and pile body were calculated. They were compared with the calculated values by the existing theory of earth pressure of backfill behind abutment and the bridge code. The results show that under the positive loading, the calculated value of bending moment and shear force of abutment bottom and pile body by the existing theory of earth pressure of backfill behind abutment and the bridge code are significantly different from test results. The bending moment and shear force of abutment bottom and pile body for AHP model can be calculated accurately by using the “Huang-Lin” method. The test results of LAHP model are significantly different from the theoretical values. Under the positive loading, the bending moments of abutment bottom and pile body for AHP and LAHP models gradually increase with the increase of displacement loading. In addition, the surcharge loading of backfill behind abutment(larger unbalanced earth pressure)has an important influence on bending moment and shear force of abutment bottom and pile body. The bending moments of abutment bottom and pile body for LAHP model are larger than those of AHP model. However, the shear force of abutment bottom for LAHP model is less than that of AHP model. The shear force of pile body for LAHP model is larger than that of AHP model.

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Last Update: 2021-02-10