Influence of Lateral Multistage Unloading Intensity on Mechanical Properties of Reconstituted Coastal Soils Containing Silty Particles
Source abstract
Abstract
The unclear understanding of the mechanical behavior of soil under unloading conditions is a significant reason for the frequent occurrence of accidents and difficulties in the deformation control of foundation pit engineering in coastal areas. This paper discusses the effect of multistage unloading intensity on the mechanical properties of reconstituted coastal soils containing silty particles through a series of laboratory tests, namely, the CU triaxial, bender-element, and permeability tests. Results indicate that, with an increase in unloading intensity, the shear strength and stiffness parameters decrease, while permeability slightly increases. The effect of unloading intensity on the mechanical properties of silt and mucky silty clay is more pronounced. Additional consideration should be given to the effect of a single excavation depth on the mechanical properties of fine-grained soil in foundation pit engineering in order to ensure the stability of the surrounding soil and the safety of adjacent structures.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Geotechnical Engineering and Soil Mechanics · Geotechnical Engineering and Soil Stabilization · Geotechnical Engineering and Underground Structures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518061, China
Underground Polis Academy, Shenzhen University, Shenzhen 518061, China
Key Laboratory of Coastal Urban Resilient Infrastructures (MOE), Shenzhen University, Shenzhen 518061, China
College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310023, China
Funding
China Postdoctoral Science Foundation · Zhejiang science and technology planning project · National Natural Science Foundation of China
References (26)
Show source-provided references
1. Research on combined construction technology for cross-subway tunnels in underground spaces10.1016/j.eng.2017.08.001 ↗
2. Excavation collapse of Hangzhou subway station in soft clay and numerical investigation based on orthogonal experiment method10.1631/jzus.A1200120 ↗
3. Remediation of damaged shield tunnel using grouting technique: Serviceability improvements and prevention of potential risks10.1061/(ASCE)CF.1943-5509.0001335 ↗
4. Contributions to responses of existing tunnel subjected to nearby excavation: A review10.1016/j.tust.2021.104195 ↗
5. Field measurements and analysis of real-time capsule grouting to protect existing tunnel adjacent to excavation10.1016/j.tust.2021.104350 ↗
6. Numerical Analysis of Deep Foundation Pit Excavation Supported by Large Diameter Ring Beam. IOP Conference Series: Earth and Environmental Science
7. Zhu, M., Chen, X., Zhang, G., Pang, X., Su, D., and Liu, J. (2022). Parameter back-analysis of HS model for granite soil and its engineering applications. Rock Soil Mech., 1–12.
8. Stress-Path Dependent Behavior of Cohesionless soil10.1061/AJGEB6.0000235 ↗
9. An insight into the unloading/reloading loops on the compression curve of natural stiff clays10.1016/j.clay.2013.08.003 ↗
10. Test research on typical mechanical characteristics of soft clay under lateral unloading condition
11. Mechanical Properties of Soft Soil considering the Influence of Unloading Stress Paths10.1155/2021/8813882 ↗
12. Experimental study on influence of excess pore water pressure and unloading ratio on unloading mechanical properties of marine sedimentary soft soils10.1016/j.oceaneng.2019.106680 ↗
13. Experimental studies on unloading deformation properties of silty clay of first marine layer in Tianjin urban sea
14. Experimental studies of unloading mechanical properties of silty clay of first marine layer in Tianjin city
15. Stress-deformation characteristics of silty soil based on K0 consolidation and drainage unloading stress path tests
16. Ding, J., Tian, B., Huang, M., and Huang, H. Researches on mechanical properties of soil under conditions of excavation unloading in Guangzhou. Proceedings of the 2017 2nd International Conference on Civil, Transportation and Environmental Engineering (ICCTE 2017), Shenzhen, China, 10–11 May 2017.10.2991/iccte-17.2017.15 ↗
17. Benz, T. (2007). Small-Strain Stiffness of Soils and its Numerical Consequences, University of Stuttgart, Institute of Geotechnical Engineering.
18. Stiffness at small strain: Research and practice10.1680/geot.2011.61.1.5 ↗
19. Stiffness of clays and silts: Normalizing shear modulus and shear strain10.1061/(ASCE)GT.1943-5606.0000887 ↗
20. A unified model for estimating the in-situ small strain shear modulus of clays, silts, sands, and gravels10.1016/j.soildyn.2016.01.019 ↗
21. Stress-state dependency of small-strain shear modulus in silty sand and sandy silt of Ganga10.1680/jgeot.17.P.100 ↗
22. Elastic wave velocities in granular soils10.1061/JSFEAQ.0000493 ↗
23. Influence of soil type on the effect of strain rate on small-strain cyclic shear modulus10.3208/sandf.43.5_161 ↗
24. Nonlinear soil models for irregular cyclic loadings10.1061/AJGEB6.0000820 ↗
25. Yuan, J.P., and Viet, N.H. (2011, January 9–11). Laboratory Study on Soil Shear Strength under Unloading Conditions. Proceedings of the GeoHunan International Conference, Changsha, China.10.1061/47633(412)29 ↗
26. Hyperbolic stress-strain response: Cohesive soils10.1061/JSFEAQ.0000479 ↗