Study on stability analysis method of high fill slope of Wushan Shennü Peak Airport

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), May.2023, Vol.46 No.5: 646-651, 703

DOI: 10.3969/j.issn.1003-5060.2023.05.012

Authors

HE Linlin $ ^{1,2,3} $, QIAN Jin $ ^{3} $, ZHAO Chenyu $ ^{3} $, LI Zhisong $ ^{3} $

(1. National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing 400074, China; 2. Key Laboratory of Hydraulic and Waterway Engineering of Ministry of Education, Chongqing Jiaotong University, Chongqing 400074, China; 3. School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China)

Abstract and Keywords

Abstract: This paper takes the high fill slope of Wushan Shennü Peak Airport in southwest China as an example, adopting unbalanced thrust method, simplified Bishop strip method and finite element strength reduction method to conduct comparative analysis on the stability of a typical profile under four different working conditions: nature, rainstorm, nature with cleared slope and rainstorm with cleared slope. The analysis results show that in rainstorm condition, the safety factor of the typical profile is 1.163, which is below the security and stability factor of 1.35 in the technical code for building slope engineering, indicating that rainstorm carries the risk of slope sliding. The safety factors calculated under the other three working conditions exceed the core value, indicating that the slope is in a steady state. For natural and rainstorm conditions, the safety factors of the three methods after slope surface roughness treatment increase by 98%, 88%, 73% and 118%, 109%, 118%, respectively, compared with untreated slope. The results show that in practical engineering, the measures to remove surface roughness can significantly enhance the stability of high fill slope.

Keywords: high fill slope; limit equilibrium method; strength reduction method; ABAQUS software; stability analysis

作者信息

贺林林 $ ^{1,2,3} $，钱进 $ ^{3} $，赵陈雨 $ ^{3} $，李志松 $ ^{3} $

（1. 重庆交通大学国家内河航道整治工程技术研究中心，重庆 400074；2. 重庆交通大学水利水运工程教育部重点实验室，重庆 400074；3. 重庆交通大学河海学院，重庆 400074）

摘要和关键词

摘要: 以西南地区巫山神女峰机场高填方边坡为例，文章采用不平衡推力法、简化Bishop条分法和有限元强度折减法对某典型剖面在天然、暴雨、清坡天然和清坡暴雨4种不同工况下的稳定性进行对比分析。分析结果表明：该典型剖面暴雨工况下所得的安全系数为1.163，小于建筑边坡工程技术规范规定的安全稳定系数值1.35，表明暴雨工况下存在边坡滑移的风险；其他3种工况下计算所得安全系数均大于规范值，表明边坡处于稳定状态。对于天然与暴雨工况，清表糙坡处理后3种方法下的安全系数较未清坡时分别增加了98%、88%、73%和118%、109%、118%。由此表明，在实际工程中，清表糙坡的工程措施能够显著加强高填方边坡稳定性。

关键词: 高填方边坡；极限平衡条分法；强度折减法；ABAQUS软件；稳定性分析

Funding

重庆市基础研究与前沿探索专项资助项目(cstc2018jcyjAX0559);重庆市博士后科研项目特别资助项目(Xm2017188)和重庆交通大学研究生科研创新资助项目(2021S0028)

合肥工业大学学报(自然科学版)

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