Overturning progressive collapse mechanism and control methods of excavations retained by cantilever piles

Fang, Yi; Su, J.; Zheng, G.; Cheng, Xuesong; Zhang, J.T.; Lei, Yiwen

doi:10.1016/j.engfailanal.2022.106591

Cited by 10 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spatially indeterminate structure composed of crown beams, connecting beams, and front and back piles can effectively reduce the horizontal displacement of the pile top. However, the deformation characteristics of crown beams and connecting beams are still in the description stage, and deformation characteristics such as ultra-large, ultra-long crowns, and linked beams are still to be explored [122,123].…”

Section: Deformation Characteristics Of Double-row Pile Supporting St...mentioning

confidence: 99%

Review of the Double-Row Pile Supporting Structure and Its Force and Deformation Characteristics

Lan

Wang

2023

Applied Sciences

View full text Add to dashboard Cite

The conventional support forms of foundation pit retaining piles include single-row piles, double-row piles, anchor-row piles, and so on. The double-row pile supporting structure is widely used in the deep foundation pit supporting the engineering of wharves, bridges, subways, tunnels, and high-rise and super-high-rise buildings. This study on double-row pile supporting structures mainly focuses on four aspects: (1) The influence of dimension parameters, such as pile diameter and pile length, and engineering parameters, such as pile spacing and row spacing, on the deformation control of a double-row pile structure and the stability control of foundation pits; (2) Influence of the soil arch effect on the stress and deformation of the double-row pile supporting structure; (3) Study on the deformation characteristics and rules of the components and the whole structure of the double-row pile supporting structure; (4) Study on the calculation model of pile-soil interactions. Based on the above four aspects, this paper summarizes the latest research status of the existing double-row pile supporting structure and its stress and deformation characteristics. The deformation characteristics and calculation model of the pile-soil interaction of double-row piles are reviewed and evaluated. Finally, the problems and deficiencies in the research on double-row pile support are summarized. These results provide a reference for future research on the double-row pile supporting structure of the foundation pit and the numerical analysis and calculation model and lay a solid foundation for further development of the theory.

show abstract

Section: Deformation Characteristics Of Double-row Pile Supporting St...mentioning

confidence: 99%

Review of the Double-Row Pile Supporting Structure and Its Force and Deformation Characteristics

Lan

Wang

2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…There are many more available studies on single-wall steel sheet piles (SSSPs) than DSSPs (Cheng et al [7]; Wang et al [8]; Yi et al [9]). Kimura et al [10] developed an H-joint steel pipe sheet pile technology and examined this technology through field construction tests, full-scale bending tests, and centrifuge tests.…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Cofferdam with Double-Wall Steel Sheet Piles under Wave Action from Storm Surges

Zhu,

Bi,

Xing

et al. 2024

Water

View full text Add to dashboard Cite

Double-wall steel sheet piles (DSSPs) are widely used in large-span cofferdams for docks due to their good performance against wave action during storm surges. This paper describes a study of the dynamic behavior of a DSSP cofferdam under wave action through flume tests and a numerical simulation that combined computational fluid dynamics (CFD) and the finite element method. The influences of the water level and wave height on the DSSP cofferdam were investigated experimentally and numerically. Tall waves in shallow water broke upon and impacted the seaside pile with large dynamic wave pressure, dramatically increasing the stress and displacement of the seaside pile. The overlap of the traveling and reflected waves increased the excess pore water pressure near the seaside pile due to taller overlapped waves and higher wave frequency. The DSSP cofferdam failed under the combined actions of the dynamic wave pressure and erosion of the landside seabed. The leakage and overflow of the breaking waves resulted in significant erosion of the landside seabed and greatly weakened the support of the seabed. The dynamic wave pressure then pushed the DSSP cofferdam until it failed. The simulation with the combined methods of CFD and FEM resulted in trends that were similar to those of the test measurements. Compared to the quasi-static method and pseudo-dynamic method, the results of the simulation via the present method were much closer to the test results because the simulation included the effects of breaking waves. The reinforced measure worked well to prevent the DSSP cofferdam in a sandy seabed foundation from continuous failures of deformation–leakage–erosion–tilting. However, it failed in a clay interlayer seabed foundation due to the large settlement.

show abstract

“…Another theory that requires a similar methodology is the calculation for progressive collapse [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Regulatory documents of many countries require the analysis of the erected structure for the successive disabling of structural elements that have been subjected to accidental or beyond design effects.…”

Section: Introductionmentioning

confidence: 99%

Implementation of the Weak Link Problem for Trusses

Stupishin

Mondrus

2023

Buildings

View full text Add to dashboard Cite

This article examines the application of the theory of critical strain energy levels to the determination of the limiting states of rod systems. A redundant truss is chosen to illustrate the peculiarities of changes in the self-stressing states of the structure at critical strain energy levels. The removal of ties when they reach their stress or strain limits leads to a change in the state of self-stress in the structure, which is illustrated by the removal of the rods in the trusses. The matrix notation of the governing equations for the structure allows us to visualize both the formulation of the problem and the course of its solution. We present the formulation and algorithm for solving the problem of a weak link in the structure by the example of a five-core redundant truss. The basic equations of matrix structural mechanics are given, allowing us to implement the algorithm and to determine the unknown parameters of the problem in the form of the method of displacements and the method of forces. The mathematical model of the problem is presented in the form of an eigenvalues problem, which allows us to investigate the extreme properties of the structure’s strain energy in the whole area of admissible parameter values, including the boundaries. The eigenvalues and eigenvectors make it possible to determine the extreme values of the nodal reactive forces of the structure or displacements, depending on the chosen formulation of the problem. The internal forces and deformations in the rods depend on the nodal vectors of external influences. The applied design load is balanced by the internal forces of the system and remains unchanged. This follows from the equality of the work of external forces to a part of the potential energy of the structure. The remaining part of the strain energy allows us to find the limit values of the reactive response of the structure to external actions. Additional actions on the structure can lead to the bearing capacity lost if they exceed the limits of the structure’s response. Examples show an algorithm for finding the weak link in a structure and identifying the rods that will be the first to fail under external loads. The matrices of stiffness and flexibility are formed, and the eigenvalues and vectors are found, which allow for the construction of the limit surface of allowable influences on the structure.

show abstract

Overturning progressive collapse mechanism and control methods of excavations retained by cantilever piles

Cited by 10 publications

References 15 publications

Review of the Double-Row Pile Supporting Structure and Its Force and Deformation Characteristics

Review of the Double-Row Pile Supporting Structure and Its Force and Deformation Characteristics

Stability Analysis of Cofferdam with Double-Wall Steel Sheet Piles under Wave Action from Storm Surges

Implementation of the Weak Link Problem for Trusses

Contact Info

Product

Resources

About