卢家湾大桥堆积体滑坡稳定性分析及处治措施研究
摘要:堆积体边坡普遍结构松散，稳定性差，多处于基本稳定或者临界滑动状态，在降雨、地震、施工开挖扰动等条件下，边坡极易因变形过大而失稳。以大永高速卢家湾大桥堆积体滑坡为例，通过地质调绘结合勘探成果，在掌握地层岩性、地质构造及水文地质条件等地质背景基础上，用传递系数法和刚体极限平衡法分析了卢家湾大桥滑坡堆积体的稳定性，并提出抗滑桩+锚杆的支护治理方案。利用有限元软件对加固后的边坡进行数值模拟，结果表明：边坡为复合型边坡，长时间强降雨水下渗至地下，地形上受工程建设开挖形成的临空面影响，导致了该边坡的失稳；经过计算，综合治理后坡体稳定性系数为1.2；滑坡监测数据表明，治理后坡体位移迅速收敛并趋于稳定，表明滑坡治理方案有效。工程研究成果可为今后类似工程提供参考。
Abstract:The slope structure of accumulation body in southwest mountainous area is generally loose, and its stability is low. Most of them are in the basic stable or critical sliding state. Under the conditions of rainfall, earthquake, construction and excavation, the slope is prone to instability due to excessive deformation. Taking Lujiawan Bridge landslide of Da-Yong Expressway as an example, the stability of Lujiawan Bridge landslide accumulation was analyzed by the transfer coefficient method and rigid body limit equilibrium method based on the geological background of stratum lithology, structures and hydrogeological conditions through geological mapping and exploration results, and the anti-slide pile+anchor bolt support treatment scheme was proposed. The numerical simulation of the reinforced slope was conducted using finite element software, and the results showed that the slope was a composite type, with long-term heavy rainfall water seeping underground. The terrain was affected by the free surface formed by engineering construction excavation, resulting in the instability of the slope. After calculation, the stability coefficient of the slope after comprehensive treatment is 1.2. The landslide monitoring data shows that the displacement of the slope after treatment converges rapidly and tends to stabilize, indicating the effectiveness of the landslide treatment plan. The results can provide reference for similar projects in the future.
中文标题：
卢家湾大桥堆积体滑坡稳定性分析及处治措施研究
Stability Analysis and Treatment Measures of Lujiawan Bridge Accumulation Landslide
作者：
魏东旭,万利,刘传利,郑国胜
Wei Dongxu,Wan Li,Liu Chuanli,Zheng Guosheng
作者简介:魏东旭，男，1982年生，汉族，河南商丘人，硕士，高级工程师，注册土木工程师（岩土），主要从事岩土工程设计及地质灾害评估方面的研究。E-mail：554976548@qq.com
通讯地址：
山东省交通规划设计院集团有限公司，山东济南 250031
ShandongTransportationPlanning&DesignInstituteGroupCo.,Ltd.,Jinan250031,Shandong,China
中图分类号:P 642.22
doi:10.3969/j.issn.1007-2993.2023.03.006
出版物：岩土工程技术
收稿日期:2022-02-17
修回日期:2022-06-20
录用日期:2022-12-09
网络出版日期:2023-08-08
刊出日期:2023-06-08
关键词:堆积体,滑坡,数值模拟,支护方案
Key words:accumulation body,landslide,numerical simulation,supporting scheme
文档包含图片数量：图片(9)张
文档包含表格数量：表格(5)个
参考文献：
[1]王彦东,梁 靖,裴向军. 九寨沟震后核心景区崩滑堆积体冲刷启动机制研究[J]. 岩土力学,2022,43(4):1048-1060.
[2]张国帅,王晓亮,夏建新. 入渗条件下颗粒堆积体稳定性试验研究[J]. 泥沙研究,2021,46(5):68-73.
[3]GRAYJM N T,GAIJAR P,KOKELAAR K. Particle-size segregation in densegranular avalanches[J]. Comptes Rendus Physique,2015,16(1):73-85. doi: 10.1016/j.crhy.2015.01.004
[4]周伟杰,徐卫亚,王如宾,等. 暴雨及久雨作用下东岭信滑坡堆积体的渗流特性及稳定性分析[J]. 三峡大学学报,2020,(4):28-33.
[5]黄 帆,向先超,段隆臣,等. 四川大竹镇任河大桥滑坡滑带土抗剪强度参数反演研究[J]. 施工技术,2015,44(S2):209-212.
[6]李焕焕,傅少君,惠建伟. 某大型堆积体边坡抗滑群桩治理方案分析[J]. 武汉大学学报(工学版),2021,54(11):1028-1036.
[7]湛正刚,程瑞林,孙 卫,等. 水库区大型堆积体灾变分析及对策研究[J]. 岩土工程学报,2022,44(1):194-200,208.
[8]向宝山,吴枋胤,白 皓,等. 松散堆积体隧道围岩变形特征及围岩加固技术研究[J]. 公路,2021,66(12):403-409.
基金项目：
基金项目:山东省交通规划设计院集团资助（KJ-2021-SJY-09）
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