Numerical Simulation of Soil Displacement and Settlement in Deep Foundation Pit Excavations Near Water

Hu, Zhongjing; Wang, Qingbiao; Yang, Shuo; Shi, Zhenyue; Liu, Bo; Song, Hongxu; Wang, Fuqiang

doi:10.1155/2021/5559009

Cited by 10 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of Guo et al [11] show that the groundwater level has the characteristics of periodic fluctuation with the tide. The results of Hu et al [12] show that considering the influence of the seepage of soft soil foundation, the maximum vertical displacement of the ground surface in each excavation stage occurs near the underground diaphragm wall. Gia et al [13] studied the effect of groundwater table reduction on the bearing capacity of pile foundations.…”

Section: Introductionmentioning

confidence: 99%

Research on the Influence of Groundwater in Coastal Areas on the Stress and Deformation Characteristics of Integrated Pipe Gallery

Tian

Wang

et al. 2022

Geofluids

Self Cite

View full text Add to dashboard Cite

With the high demand for basic resources such as electricity, communication, water supply, and gas in cities, most cities in my country are vigorously developing underground integrated pipe gallery. When constructing pipe gallery in coastal areas, it is necessary to consider the impact of groundwater level on structural calculations. There is still a lack of systematic research in domestic and foreign literature. Relying on the Qingdao West Coast New Area Project, this paper uses a combination of laboratory tests and MIDAS GTS/NX numerical simulation to study the influence of groundwater in the coastal area on the stress and deformation characteristics of the integrated pipe gallery. The results show that (1) the Mises stress on the roof and bottom of the integrated pipe gallery increases continuously with the rise of the groundwater level. Due to the effect of the effective stress, the Mises stress on the side wall shows a decreasing trend. (2) Due to the influence of the construction form of the cross-section interface, the maximum principal stress of each part of the M side is always smaller than that of the N side; with the continuous increase of groundwater level, the maximum principal stress at each part of the N and M sides of the pipe gallery structure joint gradually increases. (3) The overall structure of the pipe gallery floats up. Under the action of the buoyancy force, the bottom plate moves upward, and the surface displacement rises continuously with the rise of the groundwater level. (4) When the groundwater depth is the same, the analysis of the test results and the numerical simulation calculation results are basically consistent, which further verifies the validity of the numerical simulation calculation and has reference value. (5) The engineering example shows that in order to reduce the service life of the integrated pipe gallery, the impact of groundwater on the integrated pipe gallery cannot be ignored.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on the Influence of Groundwater in Coastal Areas on the Stress and Deformation Characteristics of Integrated Pipe Gallery

Tian

Wang

et al. 2022

Geofluids

Self Cite

View full text Add to dashboard Cite

show abstract

“…The numerical simulation and analysis of foundation pit excavation are of great significance to improve the design theory and construction level of deep foundation pits. At present, many scholars have published relevant papers on foundation pit excavation [24][25][26][27][28], but some numerical simulations on foundation pit excavation mainly analyze the influence of foundation pit supporting structure, such as stress and strain of underground diaphragm wall and stress and strain of anchor rod and lack relevant research on the influence of foundation pit excavation on the surrounding environment [11,[29][30][31][32]. At the same time, some numerical simulation models of foundation pit excavation use two-dimensional models instead of three-dimensional models, which cannot analyze the overall situation of foundation pit excavation comprehensively and accurately [33,34].…”

Section: Introductionmentioning

confidence: 99%

Multi-Stage and Multi-Parameter Influence Analysis of Deep Foundation Pit Excavation on Surrounding Environment

Li,

Liao,

Wang

et al. 2024

Buildings

View full text Add to dashboard Cite

As urbanization accelerates, deep excavation projects have become increasingly vital in the construction of high-rise buildings and underground facilities. However, the potential risks to the surrounding environment and the inherent complexities involved necessitate thorough research to ensure the safety of those engineering projects with deep foundation pit excavation and to minimize their impact on adjacent structures. This study introduces a multi-stage and multi-parameter numerical simulation method to scrutinize the construction process of deep foundation pits. This approach not only investigates the influence of excavation activities on nearby buildings and roads but also enhances the fidelity of simulation models by establishing a three-dimensional finite element model integrated with on-site investigated geological information. Therefore, the proposed method can provide a more holistic and accurate analysis of the overall impacts of the pit excavation process. To examine the feasibility and effectiveness of the proposed method, this study adopts the multi-stage and multi-parameter influence analysis approach for a real practical engineering case to explore the impact of excavation on the foundation pit support structure, nearby buildings, and surrounding roads. The foundation pit support’s maximum displacement was 8.64 mm, well under the 25 mm standard limit. Anchor rod forces were about 10% below the standard limit. Building and road settlements were also minimal, at 10.33 mm and 16.44 mm, respectively, far below their respective limits of 200 mm and 300 mm. This study not only validates the feasibility of design and construction stability of deep foundation pits but also contributes theoretical and practical insights, serving as a valuable reference for future engineering projects of a similar scope.

show abstract

“…Due to the coupling relationship between the displacement of the pit enclosure, the surface settlement, and the pit bottom uplift, conventional research methods are limited in reflecting the influence of multiple factors. Therefore, the analysis of pit deformation is mostly conducted through numerical simulation [17]. Lin et al [18] utilized the Midas GTS finite element software to establish a three-dimensional spatial model to simulate the excavation process of a deep foundation pit.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Monitoring and Numerical Analysis of Deformation in Deep Foundation Pit Support: A Case Study in Taizhou

Junding

Ye²,

Shen

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

With the increasing prevalence of deep foundation pit projects in modern urban construction, the deformation control of the associated support structures is crucial to ensuring construction safety. Despite the growing importance of this issue, research on deep foundation pit excavation in soft soil areas near the sea is limited. This study investigates the deformation characteristics and impact of a geometrically complex deep foundation pit project in Taizhou, utilizing both long-term in-situ monitoring and numerical simulation. The results of this study indicated that the maximum horizontal displacement of the foundation pit was approximately within the depth range of 5 m, with a value of 34.5 mm. The maximum settlement of both the top of the pit and the surrounding structures were determined to be less than 25 mm, confirming the safety of the excavation process. The excavation process of the foundation pit was simulated and analyzed by the Midas GTS finite element software. The results showed a similar variation pattern to the measured results, but the numerical results were generally lower than the measured values. This study provides valuable insights into the deformation characteristics of deep foundation pit excavation in soft soil areas and serves as a reference for future projects in similar conditions.

show abstract

Numerical Simulation of Soil Displacement and Settlement in Deep Foundation Pit Excavations Near Water

Cited by 10 publications

References 29 publications

Research on the Influence of Groundwater in Coastal Areas on the Stress and Deformation Characteristics of Integrated Pipe Gallery

Research on the Influence of Groundwater in Coastal Areas on the Stress and Deformation Characteristics of Integrated Pipe Gallery

Multi-Stage and Multi-Parameter Influence Analysis of Deep Foundation Pit Excavation on Surrounding Environment

In-Situ Monitoring and Numerical Analysis of Deformation in Deep Foundation Pit Support: A Case Study in Taizhou

Contact Info

Product

Resources

About