Research on deep foundation pit excavation based on numerical simulation

Cao, Sheng; Song, Shuai; Qi, Xin

doi:10.1088/1742-6596/1885/2/022051

Cited by 3 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, when the slope is greater than 38 • , the slope continues to increase. Although the safety factor still shows a continuous decreasing trend, the rate of change decreases and gradually tends to be gentle [15,16].…”

Section: Impact Of Different Slopes On Slope Stabilitymentioning

confidence: 97%

Stability Evaluation Method of High Fill Loess Foundation Based on Numerical Simulation

Wu,

Wang,

Cheng

et al. 2024

SCPE

View full text Add to dashboard Cite

In order to understand the stability evaluation method of high fill loess foundation, the author proposes a study on the stability evaluation method of high fill loess foundation based on numerical simulation. The author first established a three-dimensional finite element model of a multi-level high fill slope using PLAXIS 3D software based on a loess high fill slope engineering project in a certain section of northwest China. The study investigated the effects of changes in fill materials, fill boundaries, slopes, and unloading platforms on slope stability. Secondly, based on the vertical and horizontal displacement of the top and foot of each level of slope under step-by-step filling, the distribution pattern of the most dangerous points of each level of slope and the overall deformation trend of the slope were analyzed. The results indicate that the cohesion and internal friction angle of the filling material are key factors affecting the stability of high fill slopes. Reducing the height of the steps at the boundary between the filling and the undisturbed soil, deepening the width of the steps, reducing the slope, and widening the unloading platform can all improve the stability of the slope. During the construction of lower slopes, there is a significant vertical displacement mutation, while the horizontal displacement mutation is relatively slow; After the construction is completed, the deformation situation is good, and the vertical and horizontal displacement of the higher slope during construction changes greatly, with uneven distribution; After the completion of construction, the consolidation settlement period is long and the deformation is large; Emphasis should be placed on strengthening deformation monitoring at high altitudes after construction is completed. Finally, the platform width can be selected within this range based on the actual engineering situation. After the platform width is greater than 3.6m, as sufficient platform width has been reached at this point, further increasing the platform width has little impact on the safety factor, and the curve gradually flattens out. The research results have determined the stability influencing factors, deformation trends, and development laws of loess high fill slopes in the northwest region, providing a scientific basis for further research on deformation control of loess high fill slopes.

show abstract

Section: Impact Of Different Slopes On Slope Stabilitymentioning

confidence: 97%

Stability Evaluation Method of High Fill Loess Foundation Based on Numerical Simulation

Wu,

Wang,

Cheng

et al. 2024

SCPE

View full text Add to dashboard Cite

show abstract

“…The numerical simulation method offers several advantages, including strong intuitions, low costs, simple operation, strong flexibility, immediate feedback of results, and real-time monitoring of engineering progress [24][25][26][27]. Consequently, both local and international scholars have used numerical simulation to gain a deeper understanding of the deformation characteristics and stress patterns of foundations.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Multi-span Pit Excavation on Supporting Structures Based on the Cutter Soil Mixing Method

Wu,

Shan,

Liu

et al. 2023

Sustainability

View full text Add to dashboard Cite

The Cutter Soil Mixing (CSM) method, a relatively recent innovation, employs twin-wheel milling and profound agitating machinery for wall construction. In an endeavor to scrutinize the displacements and internal support stresses to the support structure during the excavation of a multi-span foundation pit founded upon the CSM method, a two-dimensional finite element model was established, utilizing the Midas GTS NX 2019 V1.2 finite element software. This model was grounded on a multi-span foundation pit excavation endeavor situated in the eastern expanse of China, where steel bracing and the CSM method assumed the preeminent mantle of support. A comprehensive scrutiny encompassed ten distinct working conditions, each juxtaposed and dissected to ascertain the displacements affecting the CSM wall and the forces exerted upon the support system during the foundation excavation process. The research findings manifest a certain interplay between the embedment depth of the CSM wall and the span of the pit excavation in shaping the displacement and support stresses within the supporting structure. While deeper embedment augments the potential for enhanced support outcomes, its efficacy remains constrained. As the embedment depth increases, the internal support moment and lateral displacement of the wall increase slightly. Taking a pit with a shallow embedded CSM wall as an example, wherein both the lateral and vertical displacements experience an ascent followed by a descent, culminating at the juncture of a four-span pit. Likewise, the axial force and bending moment exerted upon the steel supports undergo a similar trajectory, culminating with a two-span pit as the threshold. At the five-span, the maximum lateral displacement of the CSM wall exceeds that observed at the two-span by an increment of 21.14%. These findings offer invaluable insights into the embedment depth of diaphragm walls and the span of pit excavations, wielding profound implications for future undertakings akin to the foundation pits in question.

show abstract

Comparison of Soft Clay Research Based on Different Computer Constitutive Parameterization Algorithms

Zeng,

Wang,

Deng

et al. 2023

2023 International Conference on Internet of Things, Robotics and Distributed Computing (ICIRDC)

View full text Add to dashboard Cite

Research on deep foundation pit excavation based on numerical simulation

Cited by 3 publications

References 2 publications

Stability Evaluation Method of High Fill Loess Foundation Based on Numerical Simulation

Stability Evaluation Method of High Fill Loess Foundation Based on Numerical Simulation

Study on the Effect of Multi-span Pit Excavation on Supporting Structures Based on the Cutter Soil Mixing Method

Comparison of Soft Clay Research Based on Different Computer Constitutive Parameterization Algorithms

Contact Info

Product

Resources

About