潜在不稳定边坡复合式主动加固方法研究
  • 作者: 李培锋,李斯涛,李春,等
论文摘要

潜在不稳定边坡复合式主动加固方法研究*

李培锋1,2,李斯涛1,2,李春1,2,袁从华3,廖明进4 

(1.云南玉临高速公路建设有限责任公司,云南 临沧 6770002.云南交投集团投资有限公司,云南 昆明 650228; 3.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北 武汉 4300714.武汉科技大学,湖北 武汉 430065)

[摘要]公路工程建设中软岩和松散体类潜在不稳定边坡的滑坡问题频发,常规工程处治措施治理难度较大。结合某工程案例,通过室内试验研究了工程扰动和降雨条件下岩体抗剪强度的演化规律,结果表明工程扰动和降雨可使岩体强度下降超过20%,为充分利用开挖前岩体的初始强度,拟采用抗滑桩联合锚索框架的复合式主动加固方法进行边坡治理。对比分析主动与被动加固的差异,结果表明,基于主动加固思想的加固工程措施提高了边坡稳定性,避免了边坡岩土体受工程扰动后强度下降等不利后果,相比被动加固方法而言,可降低工程治理难度,减少工程量,降低工程造价。

[关键词]边坡稳定性;滑坡;加固;工程扰动;抗滑桩;锚索

[中图分类号]TU457     [文献标识码]A     [文章编号]1002-8498(2021)04-0095-04

Research on Composite Active Reinforcement Method for Potentially Unstable Slope

LI Peifeng1,2, LI Sitao1,2, LI Chun1,2, YUAN Conghua3, LIAO Mingjin4 

(1.Yunnan Yulin Expressway Construction Co., Ltd., Lincang, Yunnan 677000, China; 2. Yunnan Communications Investment & Construction Group Co., Ltd., Kunming, Yunnan 650228, China; 3. State Key Laboratory of Geo mechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 4. Wuhan University of Science and Technology, Wuhan, Hubei 430065, China)

Abstract: In the construction of highway engineering, the landslide problems of soft rock and loose mass slope occur frequently, and it is difficult to control with conventional engineering treatment measures. Combined with an engineering case, the evolution law of shear strength of rock mass under engineering disturbance and rainfall conditions is studied through indoor test. The results show that the strength of rock mass can be reduced by more than 20% under engineering disturbance and rainfall. In order to make full use of the initial strength of rock mass before excavation, a scheme of slope treatment with active reinforcement is proposed. After comparing and analyzing the difference between active and passive reinforcement, the results show that the reinforcement engineering measures based on the active reinforcement idea can improve the slope stability, avoid the adverse consequences of slope rock and soil mass strength decline after engineering disturbance, compared with the passive reinforcement method, it can reduce the difficulty of engineering treatment, reduce the engineering quantity and reduce the project cost.  

Keywords:slope stability; landslide; reinforcement; engineering disturbance; anti slide pile; anchor cable

*云南省交通运输厅科技项目(云交科教〔201845号)

[作者简介]李培锋,高级工程师,Email425585008@qq.com

[通信作者]廖明进,博士,副教授,Email215395090@qq.com

 

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