Effect Analysis of Supporting Structure and Surface Settlement on Deep Foundation Pit by Rainstorm: A Case Study in Zhengzhou

Wang, Xiaorui; Xiao, Jianhang; Zhang, Tao; Lin, Yunhong

doi:10.3390/w14223654

Cited by 3 publications

(3 citation statements)

References 31 publications

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“…However, geological conditions are distinct in different areas [18,19]. Subway station construction in urban areas may also involve dealing with geological conditions such as hard rock strata.…”

Section: Introductionmentioning

confidence: 99%

Stability of a Deep Foundation Pit with Hard Surrounding Rocks under Different in-Time Transverse Supporting Conditions

Li,

Ma,

Gao

et al. 2024

Applied Sciences

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This paper focuses on investigating the stability of a deep foundation pit with hard surrounding rocks at different excavation stages with different supporting schemes by means of numerical calculations. The supporting schemes in question were combinations of one fixed vertical support and four varied transverse supports. Drilled grouting piles were used as vertical supports, and the commonly used steel bracings and prestressed anchorages served as transverse supports. The parameters used to evaluate the stability of the foundation pit at different excavation stages included the lateral displacements of the surrounding rocks, the settlement of the surrounding ground, the axial forces of steel bracings, and displacements at the tops of the drilled grouting piles. Simulation results showed that when a transverse supporting scheme consisting of one-layer steel bracings and prestressed anchorages set at 9 m and 22.5 m underground, respectively, was adopted, the lateral displacements of the surrounding rocks and settlement of the surrounding ground at different excavation stages were the largest compared to those under the other three transverse supporting schemes, while the corresponding values were lower compared to those allowed in Chinese standard GB50007-2011, demonstrating that this kind of supporting scheme is effective in terms of ensuring the safety of the foundation pit at different excavation stages. Moreover, the setting techniques for this kind of supporting scheme were relatively simple, and the corresponding influences of supporting element arrangements on excavation techniques were the lowest. Therefore, one-layer steel bracings and one-layer prestressed anchorages constituted the most suitable transverse supporting scheme for excavating a deep foundation pit with hard surrounding rocks.

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Section: Introductionmentioning

confidence: 99%

Stability of a Deep Foundation Pit with Hard Surrounding Rocks under Different in-Time Transverse Supporting Conditions

Li,

Ma,

Gao

et al. 2024

Applied Sciences

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show abstract

“…The deformation of the foundation pit encompasses the surface settlement, horizontal and vertical displacements of the enclosure structure, and uplift of the bottom of the foundation pit. These deformations are influenced by the stress release, groundwater seepage, and soil rheology that occur after excavation of the foundation pit [15,16]. 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.…”

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

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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.

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“…In the aspect of water information management cloud platforms, Yin et al (2013) built a hydrological data sharing platform based on Hadoop technology. Wang. (2018) constructed a 'Water Service Business + Internet of Things' intelligent service platform.…”

Section: Introductionmentioning

confidence: 99%

Key Technology Research on Cloud Model Service Platform for Watershed Water Resources Planning

Wang,

Zhao,

Zhang

et al. 2023

Preprint

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With the increasing demand for water conservancy informatization, to address the problems of poor generality, low reuse rate, and update maintenance difficulty in the development of cloud model service platform for water resources planning. Based on cloud computing technology and combined with business-oriented workflows, construct a cloud model service platform for watershed water resource planning. On the basis of constructing the watershed digital water grid, this study tightly couples the water cycle model with the multi-objective optimization configuration model of water resources, and relies on the digital topological water grid to achieve dynamic configuration of regional water resources. The cloud model service platform adopts a business-oriented modeling approach, with the model library as the core, based on the B/S development architecture. Taking the Shaanxi section of the Weihe River basin as an example, the study simulates and analyzes the evolution of water cycle in the research area, and conducts multi-objective optimization configuration research on water resources at the annual planning level. The results show that: 1) the relative errors of monthly average runoff during the calibration and validation periods are − 1.67% and − 4.63%. The Nash-Sutcliffe efficiency coefficients of monthly average runoff are 0.815 and 0.795, indicating that the cloud model service platform can well depict the variation process of runoff during the validation period, respectively; 2) in the water resources allocation model of the cloud model service platform, using the NSGA-III algorithm and the multi-attribute decision-making model selects reasonable water resources allocation schemes for the Weihe River basin. The water demand in 2025 is 6.34×109 m³, the water supply is 5.84×109 m³, and the water shortage rate is 7.95%. The research results can provide technical reference and inspiration for the construction of smart water conservancy and refined allocation of water resources in the Weihe River basin.

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Effect Analysis of Supporting Structure and Surface Settlement on Deep Foundation Pit by Rainstorm: A Case Study in Zhengzhou

Cited by 3 publications

References 31 publications

Stability of a Deep Foundation Pit with Hard Surrounding Rocks under Different in-Time Transverse Supporting Conditions

Stability of a Deep Foundation Pit with Hard Surrounding Rocks under Different in-Time Transverse Supporting Conditions

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

Key Technology Research on Cloud Model Service Platform for Watershed Water Resources Planning

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