[1]张成武,豆红强,黄真萍,等.桩板式挡土墙桩间挡土板土压力计算方法研究[J].自然灾害学报,2018,(05):046-53.[doi:10.13577/j.jnd.2018.0506]
 ZHANG Chengwu,DOU Hongqiang,HUANG Zhenping,et al.Study on earth pressure acting on retaining wall slab of pile-sheet retaining wall[J].,2018,(05):046-53.[doi:10.13577/j.jnd.2018.0506]
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桩板式挡土墙桩间挡土板土压力计算方法研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年05期
页码:
046-53
栏目:
出版日期:
2018-10-28

文章信息/Info

Title:
Study on earth pressure acting on retaining wall slab of pile-sheet retaining wall
作者:
张成武1 豆红强12 黄真萍12 王浩12
1. 福州大学 环境与资源学院, 福建 福州, 350116;
2. 地质工程福建省高校工程研究中心, 福建 福州 350116
Author(s):
ZHANG Chengwu1 DOU Hongqiang12 HUANG Zhenping12 WANG Hao12
1. College of Environment and Resources, Fuzhou University, Fuzhou 350116, China;
2. Geological Engineering Research Center, Fujian Provincial University, Fuzhou 350116, China
关键词:
桩板式挡土墙桩间挡土板土压力滑坡推力土拱效应
Keywords:
pile-sheet retaining wallretaining wall slabearth pressurelandslide thrustsoil arch effect
分类号:
TU473;X9
DOI:
10.13577/j.jnd.2018.0506
摘要:
作为一种新型边坡支挡结构,桩板式挡土墙已被广泛应用于路堑、路堤以及滑坡等特殊支挡工程之中,但目前对作用于桩间挡土板上土压力的研究仍严重滞后于工程实践。为合理确定桩间挡土板上的土压力,借助桩板式挡土墙桩-板后土体土拱合理拱轴线的假定建立了相应的土拱计算模型,并假定拱后滑坡推力为均布荷载,基于土拱静力平衡条件及桩-板后土拱处于极限平衡状态,进而根据莫尔-库伦强度理论确定土拱竖向应力,藉此推导出考虑滑坡推力作用的桩间挡土板土压力计算公式。并将其与传统方法(卸荷拱法和拟化筒仓法)进行了对比分析,结果表明:本文方法更能反映作用于桩间挡土板上实际土压力的大小,且可考虑来自桩-板后土体传递而来滑坡推力的作用,其中传统方法仅是本文方法的一种特殊形式;桩间挡土板上的土压力随桩-板后土体粘聚力和内摩擦角增大而大致呈线性递减,并随拱后滑坡推力和桩跨比的增大而增大。研究成果可为桩板式挡土墙的合理设计提供参考。
Abstract:
As a new type of slope retaining structure, pile-sheet retaining wall is widely used in the cutting slope, embankment engineering and landslide treatment, however, the study of earth pressure on retaining wall slab still lags behind. In order to reasonably determine the earth pressure acting on the retaining wall slab, this paper establishes a soil arching calculation model based on the assumption of the reasonable arch axis of the pile-sheet retaining wall behind the pile arch, and the landslide thrust of the arch rear slope was assumed to be uniformly distributed. Then, based on the static balance conditions of the soil arches and the soil arching is in the limit equilibrium, the vertical stress of soil arching is determined based on the Mohr-Coulomb strength criterion, the calculation formula of earth pressure acting on retaining wall slab of pile-sheet retaining wall considering landslide thrust is deduced. Compared with the traditional method (unloading-arch theory and simplified granary method), the results show that this method can better reflect the actual earth pressure acting on the pile-retaining wall, and can consider the role of landslide thrust. Meanwhile, the traditional methods are just a special form of this method. The earth pressure on the retaining wall decreases linearly with the increases of the cohesion and internal friction angle of the soil. and increases with the thrust of the rear landslide and l/B of the pile-sheet retaining wall. The research results can provide reference for the reasonable design of pile-sheet retaining wall.

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备注/Memo

备注/Memo:
收稿日期:2018-04-18;改回日期:2018-05-25。
基金项目:福建省自然科学基金项目(2017J05061);国土资源部丘陵山地地质灾害防治重点实验室(福建省地质灾害重点实验室)开放基金项目(FJKLGH2017K006)
作者简介:张成武(1993-),男,硕士研究生,主要从事边坡稳定研究.E-mail:N160620012@fzu.edu.cn
通讯作者:豆红强(1987-),男,讲师,博士,主要从事新型边坡支挡结构、数值分析等教学与研究.E-mail:douhq@fzu.edu.cn
更新日期/Last Update: 1900-01-01