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Construction Technology and Safety Risk Control Measures of deep foundation pit excavation

Journal of World Architecture 2023年第2期7卷 24-29页

作者： Mingmin Jiang Shanghai Xinzhi Construction Engineering Co. Ltd.Shanghai 202150China

deep foundation pit excavation is a basic and key step involved in modern building *** order to ensure the construction quality and safety of deep foundation pits,this paper takes a project as an example to analyze deep foundation pit excavation technology,including the nature of this construction project,the main technical measures in the construction of deep foundation pit,and the analysis of the safety risk prevention and control *** purpose of this analysis is to provide scientific reference for the construction quality and safety of deep foundation pits.

关键词： Construction engineering deep foundation pit excavation Construction technology Risk prevention and control measures

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deep foundation pit excavations Adjacent to Disconnected Piled Rafts: A Review on Risk Control Practice

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Open Journal of Civil Engineering 2020年第3期10卷 270-300页

作者： Bantayehu Uba Uge Yuancheng Guo School of Civil Engineering Zhengzhou University Zhengzhou China

foundation pit excavation engineering is an old subject full of decision making. Yet, it still deserves further research due to the associated high failure cost and the complexity of the geological conditions and/or the surrounding existing infrastructure around it. This article overviews the risk control practice of foundation pit excavation projects in close proximity to existing disconnected piled raft. More focus is given to geotechnical aspects. The review begins with achievements to ensure excavation performance requirements, and follows to discuss the complex soil structure interaction involved among the fundamental components: the retaining wall, mat, piles, cushion, and the soil. After bringing consensus points to practicing engineers and decision makers, it then suggests possible future research directions.

关键词： deep foundation pit excavation Disconnected Piled Raft foundation Risk Control Observational Method

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Influencing factors and control measures of excavation on adjacent bridge foundation based on analytic hierarchy process and finite element method

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Frontiers of Structural and Civil Engineering 2021年第2期15卷 461-477页

作者： Shuangxi FENG Huayang LEI Yongfeng WAN Haiyan JIN Jun HAN Department of Civil Engineering Tianjin UniversityTianjin 300354China Coast Civil Structure Safety of Education Ministry Tianjin UniversityTianjin 300354China Key Laboratory of Comprehensive Simulation of Engineering Earthquake and Urban-rural Seismic Resilience CEATianjin 300354China China Railway 16th Bureau Group the 5th Engineering Co. LTDTangshan 064000China

Many uncertain factors in the excavation process may lead to excessive lateral displacement or overlimited internal force of the piles,as well as inordinate settlement of soil surrounding the existing bridge *** control is pivotal to ensuring the safety of adjacent *** this paper,an innovative method is proposed that combines an analytic hierarchy process(AHP)with a finite element method(FEM)to reveal the potential impact risk of uncertain factors on the surrounding *** AHP was adopted to determine key influencing factors based on the weight of each influencing *** FEM was used to quantify the impact of the key influencing factors on the surrounding *** terms of the AHP,the index system of uncertain factors was established based on an engineering investigation.A matrix comparing the lower index layer to the upper index layer,and the weight of each influencing factor,were *** was found that the excavation depth and the distance between the foundation pit and the bridge foundation were fundamental *** the FEM,the FE baseline model was calibrated based on the case of no bridge surrounding the foundation *** consistency between the monitoring data and the numerical simulation data for a ground settlement was *** simulations were then conducted to quantitatively analyze the degree of influence of the key influencing factors on the bridge ***,the lateral displacement of the bridge pile foundation,the internal force of the piles,and the settlement of the soil surrounding the pile foundation were emphatically *** most hazardous construction condition was also ***,two safety control measures for increasing the numbers of support levels and the rooted depths of the enclosure structure were suggested.A novel method for combining AHP with FEM can be used to determine the key influencing aspects among many uncertain factors during a construction,which ca

关键词： deep foundation pit excavation adjacent bridge foundation influencing factors analytic hierarchy process finite element

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