2D calculation method on global stability safety factor of diaphragm wall slurry trench based on minimum potential energy principle
Source abstract
Abstract
In order to limit the phenomenon that the global stability safety factor (GSF) of the diaphragm wall slurry trench calculated by the two-dimensional (2D) wedge method is too small, the 2D calculation model on global instability of trench wall is established by assuming the whole critical failure surface (CFS) is a quarter elliptic cylindrical surface, and the determination method of CFS is given too. In view of the successful application of the minimum potential energy principle in slope stability checking calculation and on the basis of the new model established, the 2D minimum potential energy method for calculating the GSF is proposed according to the minimum potential energy principle. The correctness of the 2D calculation model built and the rationality of the 2D calculation method proposed are verified based on ten engineering cases, and the sensitivity of the GSF to various parameters is analyzed on the basis of six design examples. Finally, the new calculation method is applied to the global stability checking calculation of trench wall in practical engineering, and the result shows the new calculation method given in this paper is still conservative, so the result calculated by the new calculation method is advised to be multiplied by a modification factor of 1.67 in practical application.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Geotechnical Engineering and Underground Structures · Geotechnical Engineering and Analysis · Geotechnical Engineering and Soil Stabilization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Mechanics and Engineering Science, Hohai University 1 , Nanjing 211100, China
School of Civil Engineering, Jiangsu College of Engineering and Technology 2 , Nantong 226007, China
Rugao Architectural Engineering Quality and Safety Management Center 3 , Rugao 226600, China
College of Harbour, Coastal and Offshore Engineering, Hohai University 4 , Nanjing 210098, China
China Railway Major Bridge Engineering Group Co., Ltd. 5 , Wuhan 430000, China
Tongling Comprehensive Transportation Investment Group Co., Ltd. 6 , Tongling 244000, China
Funding
Postgraduate Research and Practice Innovation Program of Jiangsu Province · Science and Technology Plan Project of Nantong · Teaching Reform Research Project of Jiangsu College of Engineering and Technology
References (30)
Show source-provided references
1. Stability analysis of slurry trenches in similar layered soils10.1061/(asce)gt.1943-5606.0000958 ↗
2. J. F. Cui , “Research on the circumferential stiffness and mechanical behavior of large diaphragm wall,” Ph.D. thesis (Hunan University, Changsha, China, 2019) (in Chinese).
3. Lateral extrusion analysis of sandwiched weak soil in slurry trench10.1061/(asce)1090-0241(1998)124:11(1082) ↗
4. Analytical solutions for stability of slurry trench10.1061/(asce)1090-0241(2004)130:7(749) ↗
5. Analysis of trench face stability of diaphragm wall panel during slurry trenching
6. Limit analysis for local and overall stability of a slurry trench in cohesive soil10.1061/(asce)gm.1943-5622.0000268 ↗
7. A Calculation method of slurry volume-weight during trenching construction of a diaphragm wall based on the stability of slot wall10.13807/j.cnki.mtt.2018.01.024 ↗
8. Y. Zhou , “Mechanism on the stability of trench in construction of deep diaphragm wall in soft ground,” M.Sc. thesis (Soochow University, Suzhou, China, 2019) (in Chinese).
9. Research status of the instability mode and its stability calculation method of underground diaphragm wall10.19713/j.cnki.43-1423/u.2019.07.019 ↗
10. Comparative study of global stability analysis methods of rectangular diaphragm wall panel trenches
11. Engineering evaluation method for overall stability of slurry trenches10.11779/CJGE202105002 ↗
12. Analysis of space time effect on the stability for slurry trench of diaphragm wall
13. Analysis of the stability of slurry trench with a surcharge and engineering application
14. La stabilité des tranchées profondes forées en présence de boue10.1051/lhb/1964046 ↗
15. Stability of bentonite slurry trenches with some experiences in Swiss practice
16. Stability analysis of slurry trenches10.1061/(asce)0733-9410(1984)110:11(1577) ↗
17. The stability of a slurry trench in cohesionless soils10.1680/geot.1965.15.4.387 ↗
18. Stability of long trenches in sand supported by bentonite-water slurry10.1061/(asce)1090-0241(2004)130:9(915) ↗
19. Stability of slurry trenches with inclined ground surface10.1061/(asce)gt.1943-5606.0000868 ↗
20. Horizontal slice method for stability of slurry trench
21. 2D and 3D stability analysis of slurry trench in frictional/cohesive soil10.1631/jzus.a1200257 ↗
22. Upper bound stability analysis of slurry-supported trenches in layered soils10.1016/j.compgeo.2020.103554 ↗
23. Stability analysis of slurry trench based on nonlinear failure criterion and energy consumption analysis method10.19713/j.cnki.43-1423/u.t20210199 ↗
24. Comparative analysis on slope stability based on minimum potential energy method and Bishop method10.16232/j.cnki.1001-4179.2015.22.010 ↗
25. Analysis method of homogeneity slope stability based on improved minimum potential energy10.13204/j.gyjz201603019 ↗
26. New solution of 2D slope stability analysis based on minimum potential energy principle10.6052/1000-0879-17-004 ↗
27. Study on whole sliding direction of two-dimensional slope based on minimum potential energy method10.16232/j.cnki.1001-4179.2021.02.026 ↗
28. Evaluation of 3D slope stability based on the minimum potential energy principle10.1016/j.compgeo.2022.104717 ↗
29. Three-dimensional soil slope dynamic stability assessment using minimum potential energy approach10.1016/j.soildyn.2023.107837 ↗
30. Management Commission of Housing and urban-rural development of Shanghai,“Chinese technical code for excavation engineering,” Report No. DG/TJ08-61-2018 J11577-2018 (Tongji University Press, Shanghai, China, 2018) (in Chinese).