Effect analysis on long-short pile combined with reinforcement in passive zone in deep soft soil excavation

4th International Conference on Energy Equipment Science and Engineering

Li, Song^1 ; Yao, Aiguo^1 ; Ma, Yun^2 ; Zhu, Jia^2 ; Ni, Xin^2 ; Yi, Lili^2 ; Dong, Qian^2

Engineering Faculty, China University of Geosciences, Wuhan Hubei

430074, China^1

Research and BIM Center, Central Southern Survey Design Institute Group Co. Ltd., Wuhan Hubei

430071, China^2

关键词: Deep soft soils;    Effect analysis;    Horizontal displacements;    Long pile;    Long short piles;    Overall stabilities;    Short pile;    Support structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/242/6/062052/pdf
DOI  :  10.1088/1755-1315/242/6/062052

来源: IOP

【 摘 要 】

The article introduces long-short pile combined with reinforcement in passive zone support structure about some project in detail and analyzes mechanism of the support briefly. The influence of long-short pile and reinforcement in passive zone on deformation of support pile, overall stability of excavation, moment of support pile is analyzed by using finite element method. The results show: compared to no reinforcement, the maximum horizontal displacement of support pile is significantly reduced after reinforcement in passive zone, and overall stability safety factor of excavation has a more substantial increase; After setting a certain amount of reinforcement mass, there has a little effect on maximum horizontal displacement of support pile by using short pile, long-short pile and long pile, but it is minimal by using short pile; The setting of long pile is beneficial to improve the overall stability safety factor of excavation, but whether the passive zone reinforces or not has a greater impact on the stability of excavation; When the parameters of reinforcement mass reach a certain range, the parameters of reinforcement mass has little effect on the maximum horizontal displacement of support pile, but it has a certain role in improving the overall stability safety factor of excavation; The height of reinforcement mass has a great influence on the moment of support pile, but the form and width of reinforcement mass have little effect on the moment of support pile.