| 门架式抗滑桩设计参数优化与桩体变形分析 |
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| 引用本文： | 王鹏斌,阎长虹,万佳佳,郭建强,娄志会,郭书兰.门架式抗滑桩设计参数优化与桩体变形分析[J].地质论评,2021,67(6):67120016-67120016. |
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| 作者姓名： | 王鹏斌 阎长虹 万佳佳 郭建强 娄志会 郭书兰 |
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| 作者单位： | 南京大学地球科学与工程学院,南京,210046;北京城建中南土木工程集团有限公司,北京,102200;南京地铁集团有限公司,南京,210008 |
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| 基金项目： | 本文为江苏省科技厅社会发展面上项目（编号:BE2019705）和南京地铁宁句城际科研项目的成果 |
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| 摘 要： | 近年来，因门架式抗滑桩具有较高的能效比，可以更为经济地实现有效加固，因而在大型滑坡地质灾害的治理中被广泛使用。门架式抗滑桩的设计参数选取是实际工程中的难点，因此本文采用数值模拟的方法对其设计参数的选取进行了优化研究。首先，对门架式抗滑桩的加固机理进行了阐述，详细分析了桩土的耦合作用。然后，基于加固后边坡稳定性的变化以及潜在滑移面的形态演变，对桩的设计参数进行了优化分析。在此基础上考虑到门架式抗滑桩的显著特点是在联系梁作用下桩体结构的受力协调，本文重点量化分析了分级堆载情况下门架式抗滑桩体结构的受力协调性，特别是利用荷载分担比来量化分析前后排桩的受力协调性，根据其在不同设计参数下的变化规律，得出桩体最佳桩间距和桩排距范围分别是3D~5D和3D~4D（D为桩径）；最后，建立了最佳桩体设计参数条件下桩顶位移与堆载之间关系的指数函数方程。这一研究将为门式抗滑桩的设计与变形控制提供理论依据。
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| 关 键 词： | 门架式抗滑桩 参数优化 量化分析 受力协调性 |
| 收稿时间： | 2021/8/7 0:00:00 |
| 修稿时间： | 2000/11/26 0:00:00 |
Design parameter optimization and deformation analysis of portal anti-slide pile |
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| WANG Pengbin,YAN Changhong,WAN Jiaji,GUO Jianqiang,LOU Zhihui,GUO Shulan.Design parameter optimization and deformation analysis of portal anti-slide pile[J].Geological Review,2021,67(6):67120016-67120016. |
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| Authors: | WANG Pengbin YAN Changhong WAN Jiaji GUO Jianqiang LOU Zhihui GUO Shulan |
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| Abstract: | In recent years,portal anti-slide pile has been widely used in the treatment of large-scale landslide geological disasters because of its high energy efficiency ratio and more economical and effective reinforcement.The selection of design parameters of portal anti-slide pile is a difficulty in practical engineering,so this paper uses the method of numerical simulation to optimize the selection of design parameters.Firstly,the reinforcement mechanism of portal anti-slide pile is expounded,and the coupling effect of pile and soil is analyzed in detail.Then,based on the change of slope stability after reinforcement and the morphological evolution of potential slip surface,the design parameters of pile are optimized and analyzed.On this basis,considering that the remarkable feature of portal anti- slide pile is the force coordination of pile structure under the action of tie beam,this paper focuses on the quantitative analysis of the force coordination of portal anti-slide pile structure under graded surcharge.What''s different is the load sharing ratio is used to quantitatively analyze the stress coordination of front and rear rows of piles,and studies its variation law under different design parameters.The optimum pile spacing and pile row spacing are 3D~ 5D and 3D~ 4D respectively (D is the pile diameter).Finally,the exponential function equation of the relationship between pile top displacement and surcharge load under the condition of optimal pile design parameters is established. This study will provide a theoretical basis for the design and deformation control of portal anti-slide pile. |
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| Keywords: | portal anti-slide pile parameter optimization quantitative analysis force coordination |
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