| 柔性板桩板墙加固斜坡填方地基的土压力分配问题研究 |
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| 引用本文： | 董捷,张永兴,黄治云.柔性板桩板墙加固斜坡填方地基的土压力分配问题研究[J].岩土力学,2010,31(8):2489-2495. |
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| 作者姓名： | 董捷 张永兴 黄治云 |
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| 作者单位： | 1.铁道第三勘察设计院集团有限公司，天津 300142；2 重庆大学 土木工程学院，重庆 400045 |
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| 基金项目： | 国家自然科学基金，国家杰出青年科学基金，"十一五"国家科技支撑计划课题子题，国务院三峡办移民安置规划司三峡库区三期地质灾害防治科研项目 |
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| 摘 要： | 通过对桩板墙挡土板的受力变形特征分析，指出桩间采用柔性挡土板时，作用于挡土板上的土压力相对较小。在对比分析拟化简仓法与卸荷拱法的基础上，针对当前挡土板土压力计算中存在的问题，对柔性板桩板墙加固斜坡填方地基展开试验研究，并重点研究桩前、桩后施工挡土板时墙后土压力的分布规律。通过对布置在挡土板上的位移计及预埋的土压力计进行监测，结果表明，挡土板布置在桩前时其挠曲变形及承受的土压力值较小，且桩间土拱效应更易得到发挥。挡土板上土压力自上而下多呈抛物线型分布，而作用于桩背侧的土压力分布相对复杂。通过对桩后布置挡土板的土压力分布规律进行为期21 d的监测，研究了土压力变化的时间效应。
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| 关 键 词： | 柔性板 桩板墙 填方地基 土压力计 时间效应 |
| 收稿时间： | 2008-12-12 |
Study of earth pressure distribution of flexiboard sheet-pile walls used in reinforced fill foundation on ramp |
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| DONG Jie,ZHANG Yong-xing,HUANG Zhi-yun.Study of earth pressure distribution of flexiboard sheet-pile walls used in reinforced fill foundation on ramp[J].Rock and Soil Mechanics,2010,31(8):2489-2495. |
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| Authors: | DONG Jie ZHANG Yong-xing HUANG Zhi-yun |
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| Institution: | 1. Third Railway Survey and Design Institute Group Corporation, Tianjin 300142, China； 2. College of Civil Engineering, Chongqing University, Chongqing 400045, China |
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| Abstract: | The viewpoint that earth pressure acted on breast board is lesser when flexiboard is used in sheet-pile wall engineering, which is expounded based on the load distribution and deforming characteristic of board between two adjacent piles. There are some problems which exist in simplified granary method and unloading-arch theory; therefore, the model tests for simulating the flexiboard sheet-pile walls used in reinforced fill foundation on ramp are designed to primarily research and compare earth pressure distribution patterns when flexiboards are fixed on frontal or dorsal suiface of piles. It is indicated that both of earth pressure acted on flexiboards and their deflection deformations are lesser; moreover , soil arching effect is more intensive, when the flexiboards are constructed on the frontal surface of piles according to testing results of dial indicators and earth pressure cells. The measured soil pressure distributions of flexiboards almost present parabolic curves, whereas dorsal load ditributions of piles are complex. In addition, the comparison and analysis are made about two theoretical calculation values and testing results. Finally, the time effect of earth pressure variation is studied by monitoring earth pressure cells when flexiboard is on the dorsal suiface of piles; this process that has been lasting for 21 days since boulder strips had been stacked on fill foundation. |
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| Keywords: | flexiboard sheet-pile wall fill foundation earth pressure cell time effect |
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