A Case Study on Field Monitoring Analysis of Deep Foundation Pit in Soft Soils

Zhang, Xiaoshuang; Zhang, Xiuchuan; Han, Yunshan

doi:10.1155/2019/9342341

Cited by 9 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Xu et al [7] designed an automatic monitoring system for foundation pits based on vibrating wire sensors, which can monitor the whole process of deep foundation pit construction and provide early warnings of structural safety in real time. Zhang et al [8] developed a foundation pit monitoring system based on the Internet of Things and WebGIS. The wireless monitoring system is composed of sensors, data collectors, data transmission equipment, and an information management module, which can achieve the on-line monitoring and early warning of indicators such as the horizontal displacement and settlement of the foundation pit.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Analysis of Construction Safety of Large Underground Space Based on Digital Twin

Yu,

Liu,

Wang

et al. 2024

Buildings

View full text Add to dashboard Cite

With the rapid development of underground space, the issue of safety in construction processes is becoming more and more significant. The purpose of this paper is to solve the problem of the existing underground space monitoring technology not being centralized and unified. In view of the problems related to large underground spaces in the process of constructing complex structures, with the introduction of Internet of Things technology and digital twins, we put forward an application of an intelligent safety-monitoring digital twin system in the construction of a large underground space structure, and at the same time, explore the Internet and digital integration mechanism of the twin system. The twin system uses BIM technology to establish the corresponding physical construction model, and collects multi-source heterogeneous monitoring data in real time through Internet of Things technology to achieve the exchange of information between the virtual construction model and the physical construction model. The twin system uses the multi-source heterogeneous data for real-time security analysis, and obtains the security status of the structure and feeds it back to the application service layer. The effectiveness and practicability of the twin system in large underground spaces are verified by an example project. Aiming at the safe performance of the orthogonal arch, the mapping relationship of various parameter indexes is obtained, and reasonable control measures are given. This study provides a new solution for improving the safety of construction projects and risk prevention and control, and has important theoretical and practical value for the safety management of underground space construction processes.

show abstract

Section: Introductionmentioning

confidence: 99%

Intelligent Analysis of Construction Safety of Large Underground Space Based on Digital Twin

Yu,

Liu,

Wang

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…Field monitoring is generally implemented alongside numerical simulation [15]. In previous studies, the three-dimensional finite difference method in combination with on-site test data is employed to analyze the deformation and stability of existing tunnel structure as well as predict weak areas during excavating the adjacent deep foundation pit [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Behavior of an Existing Tunnel during Excavating Adjacent Deep Foundation Pit

et al. 2023

View full text Add to dashboard Cite

The excavation of a deep foundation pit adjacent to an existing tunnel may lead to the large deformation and induce damages in the tunnel structure. However, the influence on existing tunnel structure from nearby excavations has not been understood clearly, since it is affected by complex influencing factors of not only the geological and topographical conditions but also the construction method and positional relationship of the adjacent structures. This paper presents a numerical investigation into an existing underground rail transit line during the excavation of an adjacent deep foundation pit, in which the behavior of the existing tunnel structure from excavating the aforementioned foundation pit is clarified, and the effectiveness of the adopted three-dimensional model is confirmed by comparison between the numerically calculated and field-measured ground settlement of the monitoring point. The results demonstrate that the deformation of the existing tunnel structure is mostly induced by the excavation of the deep foundation pit. This study can provide a reference of deep excavations adjacent to existing infrastructures.

show abstract

“…The change law of the earth pressure of normally consolidated soil after foundation pit excavation was analyzed, and the loading and unloading modulus formula was obtained by the parameter calculation method in the Ken-tension curve model. Zhang et al [9] studied the field monitoring data of a deep foundation pit in soft soil, and the displacement and force characteristics of the diaphragm wall support during the excavation of the foundation pit were analyzed. It was also found that Hsieh and Ou can better describe the development trend of surface settlement.…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Yang

et al. 2021

Geofluids

View full text Add to dashboard Cite

Advancing urbanization in China requires large-scale high-rise construction and underground transportation projects. Consequently, there is an increasing number of deep foundation pits adjacent to water bodies, and accidents occur frequently. This study uses a numerical simulation method to study the stability of the deep foundation pit near water based on the Biot three-dimensional seepage-stress coupling model, with the open-cut section on the south bank of the Jinan Yellow River Tunnel Project as the engineering field test. This indicates the following: (1) the maximum horizontal displacement of the diaphragm wall occurred in the fifth excavation stage, and a horizontal brace effectively controlled the inward horizontal displacement of the foundation pit; (2) considering the effect of seepage in the soft soil foundation, the maximum vertical displacement of the ground surface at each excavation stage occurred adjacent to the underground continuous wall. As the depth of the foundation pit increased, the vertical surface settlement decreases gradually in the direction away from the excavation face; (3) considering the seepage conditions, within each interval of excavation of the foundation pit, the horizontal displacement of the continuous underground wall and ground settlement declined; and (4) the numerical simulation and field monitoring data were in good agreement. Under the conditions of accurate model simplification and parameter selection, numerical simulations can adequately forecast conditions of the actual project.

show abstract

A Case Study on Field Monitoring Analysis of Deep Foundation Pit in Soft Soils

Cited by 9 publications

References 29 publications

Intelligent Analysis of Construction Safety of Large Underground Space Based on Digital Twin

Intelligent Analysis of Construction Safety of Large Underground Space Based on Digital Twin

Numerical Study on the Behavior of an Existing Tunnel during Excavating Adjacent Deep Foundation Pit

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

Contact Info

Product

Resources

About