Effect of cantilever soldier pile foundation excavation closing to an existing composite foundation

Wang, Guihe; Yang, Yiqin

doi:10.1007/s11771-013-1626-4

Cited by 10 publications

(8 citation statements)

References 5 publications

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“…In this regard, recent years have witnessed that the synergistic mechanism influences the vertical load-bearing characteristics throughout the process of neighbouring excavation work. [18][19][20] The physical model test results of Li et al [21] on the load distribution of rigid pile composite foundation revealed the same characteristics under the condition of soil displacement from retaining wall rotation about the base.…”

Section: Introductionmentioning

confidence: 82%

Numerical study on stress paths in grounds reinforced with long and short CFG piles during adjacent rigid retaining wall movement

Uge

Guo

Liu

2022

Studia Geotechnica Et Mechanica

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Ensuring the safety of existing structures is an important issue when planning and executing adjacent new foundation pit excavations. Hence, understanding the stress state conditions experienced by the soil element behind a retaining wall at a given location during different excavation stages has been a key observational modelling aspect of the performance of excavations. By establishing and carrying out sophisticated soil–structure interaction analyses, stress paths render clarity on soil deformation mechanism. On the other hand, column-type soft ground treatment has recently got exceeding attention and practical implementation. So, the soil stress–strain response to excavation-induced disturbances needs to be known as well. To this end, this paper discusses the stress change and redistribution phenomena in a treated ground based on 3D numerical analyses. The simulation was verified against results from a 1 g indoor experimental test conducted on composite foundation reinforced with long and short cement–fly ash–gravel (CFG) pile adjacent to a moving rigid retaining wall. It was observed that the stress path for each monitoring point in the shallow depth undergoes a process of stress unloading at various dropping amounts of principal stress components in a complex manner. The closer the soil element is to the wall, the more it experiences a change in principal stress components as the wall movement progresses; also, the induced stress disturbance weakens significantly as the observation point becomes farther away from the wall. Accordingly, the overall vertical load-sharing percentage of the upper soil reduces proportionally.

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Section: Introductionmentioning

confidence: 82%

Numerical study on stress paths in grounds reinforced with long and short CFG piles during adjacent rigid retaining wall movement

Uge

Guo

Liu

2022

Studia Geotechnica Et Mechanica

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“…Wang and Yang [177] performed experimental study on the interaction of new excavation with adjacent high-rise building founded on CFG piled raft. The results of their model test indicated that as the adjacent excavation work was proceeded, the adjustment of the load shared by the CFG piles continued in a complex manner of joint interaction among the pit retaining structure (piles), composite ground and strip of soil column between pit supporting piles and CFG pile composite ground.…”

Section: Risk Control Measuresmentioning

confidence: 99%

Deep Foundation Pit Excavations Adjacent to Disconnected Piled Rafts: A Review on Risk Control Practice

Uge¹,

Guo²

2020

OJCE

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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.

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“…With the accelerated development of China's economy, the constructions of urban underground space, large-scale water conservancy, and civil engineering projects are becoming the current focus of China, where the safety and stability of foundation pit during the excavation processes have become the main problems [1,2]. However, due to the complex geological conditions of foundation pit, it is easy to collapse during the processes of excavations.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on the Progressive Failure Processes of Foundation Pit Excavation Based on a New Particle Failure Method

Zhu

et al. 2021

Geofluids

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The predictions of failure zone during the foundation excavations will provide important guidance for the safety constructions of engineering structures. Based on this background, the smoothing kernel function in the traditional SPH method has been improved. The failure mark η is introduced into the program to realize the failure characteristics of particles at meso–scale. The “Killing Particle Method” has also been proposed, which can realize the simulations of complex excavation processes. The whole progressive failure processes of the excavation of a foundation pit are numerically simulated and the results show that (1) the failure zone of the excavated foundation pit without retaining walls appears at the corner and then gradually develops into the deep. However, the failure zone of the excavated foundation pit with retaining walls only develops longitudes along the retaining wall. (2) The stiffness of retaining wall has a great impact on the failure zone of foundation pit excavation. The greater the stiffness of retaining wall, the greater the damage degree. (3) The rationality of the proposed method is verified by the comparisons of the simulation results of the proposed method with the ABAQUS numerical examples and the engineering practices. Future research directions should focus on developing the 3D parallel IKSPH programs. The research results can provide some references for the applications of SPH method into predicting the failure zone of foundation pit excavations and ensuring the safety of engineering constructions.

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Effect of cantilever soldier pile foundation excavation closing to an existing composite foundation

Cited by 10 publications

References 5 publications

Numerical study on stress paths in grounds reinforced with long and short CFG piles during adjacent rigid retaining wall movement

Numerical study on stress paths in grounds reinforced with long and short CFG piles during adjacent rigid retaining wall movement

Deep Foundation Pit Excavations Adjacent to Disconnected Piled Rafts: A Review on Risk Control Practice

Numerical Simulation on the Progressive Failure Processes of Foundation Pit Excavation Based on a New Particle Failure Method

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