[1]单玉麟,黄福云,罗小烨,等.整体桥台后大不平衡土压力计算方法研究[J].郑州大学学报(工学版),2022,43(02):84-90.[doi:10.13705/j.issn.1671-6833.2022.02.012]
　SHAN Yulin,HUANG Fuyun,LUO Xiaoye,et al.Study on Calculation Method of Larger Unbalanced Earth Pressure of Backfill behind Abutment in Integral Abutment Jointless Bridges[J].Journal of Zhengzhou University (Engineering Science),2022,43(02):84-90.[doi:10.13705/j.issn.1671-6833.2022.02.012]
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整体桥台后大不平衡土压力计算方法研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年02期
页码:
84-90
栏目:
出版日期:
2022-02-27

文章信息/Info

Title:
Study on Calculation Method of Larger Unbalanced Earth Pressure of Backfill behind Abutment in Integral Abutment Jointless Bridges
作者:
单玉麟; 黄福云; 罗小烨; 陈宝春
福州大学土木工程学院;

Author(s):
SHAN Yulin;  HUANG Fuyun;  LUO Xiaoye;  CHEN Baochun
School of Civil Engineering, Fuzhou University, Fuzhou 350108, China
关键词:
Keywords:
bridge engineering;  integral abutment jointless bridges;  pseudo-static test;  larger unbalanced earth pressure of backfill behind abutment;  soil-abutment-steel H-pile
分类号:
TU473
DOI:
10.13705/j.issn.1671-6833.2022.02.012
文献标志码:
A
摘要:
为研究车辆重载等引起的台后大不平衡土压力的变化，本文开展了有无考虑台后大不平衡土压力影响的整体式桥台-H型钢桩-土相互作用拟静力试验研究，分析对比台后大不平衡土压力大小、分布规律及其计算方法。研究结果表明：在本文试验条件下，随着位移荷载的增加，AHP模型台后土压力由“三角形”分布变为“梯形”分布；而LAHP模型台后土压力呈“梯形”分布。LAHP模型的台后土压力系数整体上大于AHP模型的。研究结果还表明：现有的台后土压力系数计算方法不适用于整体桥。如当△/H=0.012时，AHP和LAHP模型的台后土压力系数远大于公路桥涵设计通用规范（JTG D60-2015）中主动土压力系数Kac和静止土压力系数K0。另外，AHP和LAHP模型的台后土压力系数均超过了Coulomb被动土压力系数，也远大于现有的计算方法。
Abstract:
In order to study the variation of larger unbalanced earth pressure of backfill behind abutment caused by vehicle load, several reciprocating low-cycle pseudo-static tests on interaction of soil-abutment-steel H-pile with or without considering the effect of unbalanced earth pressure of backfill behind abutment were carried out. A comparative study was performed to find magnitude, distribution law and calculation method of larger unbalanced earth pressure of backfill behind abutment. The test results indicated that under the test conditions of this study, with the increase of displacement load, the distribution law of earth pressure for the abutment-steel H-pile interaction under backfill behind abutment (AHP model)changed from “triangle“distribution to “trapezoidal” distribution. The distribution law of earth pressure for the abutment-steel H-pile interaction under larger unbalanced earth pressure of backfill behind abutment (LAHP model) was a "trapezoidal" distribution. The earth pressure coefficient for LAHP model was larger than that of AHP model under the reciprocating displacement loading. The existing calculation method of earth pressure coefficient K was not applicable to IAJBs. The earth pressure coefficient of AHP and LAHP models were 12.34 and 16.16 respectively. They were significantly larger than active earth pressure coefficient (Kac=0.24) and earth pressure coefficient at rest (K0=0.43) from the code of General Specifications for Design of Highway Bridges and Culverts (JTG D60—2015) as well as the Coulomb theory(KpC=9.96) when δ/h reached 0.016 (δ/h=0.016). In addition, the existing calculation method of earth pressure coefficient K was also larger than the existing theoretical calculation methods(the Rankine theory KPR=3.69). In addition, the relevant research in this study could provide reference for the design and calculation and the formulation of relevant specifications in IAJBs

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更新日期/Last Update: 2022-02-25