Optimal isosceles trapezoid cross section of laterally loaded piles based on friction soil arching

Wu, Junjie; Li, Changdong; Liu, Qingtao; Fan, Fusong

doi:10.1007/s12205-017-1311-5

Cited by 26 publications

(17 citation statements)

References 32 publications

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“…Reference [7-9, 10] only considered one type soil arching. Reference [14][15][16] considered the combined effect of these two soil arching. But reference [14][15] assumed the friction can bear landslide thrust, thus the result were larger.…”

Section: Determining the Reasonable Pile Spacementioning

confidence: 99%

“…Reference [14][15][16] considered the combined effect of these two soil arching. But reference [14][15] assumed the friction can bear landslide thrust, thus the result were larger. Reference [16] did not considering the yielding condition of soil arching, the result was also a little larger for engineering design.…”

Section: Determining the Reasonable Pile Spacementioning

confidence: 99%

“…The above studies only considered the existence of one soil arching, but Li et al [13] pointed out the end-bearing and the friction soil arching were of the resistance to landslide together. Wu et al [14] analyzed the condition that these two soil arching coexisted and thus conducted the estimation of pile spacing calculation. Qiu et al [15] assumed the two soil arching shared the thrust and thus the reasonable pile space was derived.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of pile spacing considering end-bearing soil arching and friction soil arching

Liu

Wang

2020

E3S Web Conf.

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The soil arching effect is an important premise for anti-slide piles to exert the retaining ability. Pile space is an essential factor for the design of piles and is related to the soil arching behind piles. However, previous studies rarely considered the friction soil arching effect between piles and regarded the axis stress uniformly distributed. In this research, a method considering end-bearing soil arching and friction soil arching simultaneously was proposed to calculate the reasonable pile spacing. The said method considered the general shear failure and the yielding failure of these two soil arching. The yielding stress of inner-edge point and outer-edge point at arch-foot of the end-bearing soil arching were taken into consideration respectively. Based on the ultimate balance theory, the controlling equations of pile spacing were established. The case study showed that the method in this research conforms better to practice compared to previous researches. Matlab programming was employed to realize the automatic calculation.

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Section: Determining the Reasonable Pile Spacementioning

confidence: 99%

Section: Determining the Reasonable Pile Spacementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of pile spacing considering end-bearing soil arching and friction soil arching

Liu

Wang

2020

E3S Web Conf.

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“…Thus, the calculated pile spacing was too conservative. Li [19] and Wu [20] deduced a calculation formula of pile spacing based on friction soil arching but neglected the influence of lateral earth pressure. Considering basic control conditions, Xiao [21] determined pile spacing by introducing additional conditions such as calculated pile width and pile-soil deformation coordinating conditions.…”

Section: State Of the Artmentioning

confidence: 99%

“…The calculation formulas of pile spacing were deduced in References [15][16][17][18][19][20][21][22]. These formulas only consider uniformly distributed loads behind the arch and neglect lateral earth pressure.…”

Section: State Of the Artmentioning

confidence: 99%

A New Method to Determine a Reasonable Pile Spacing of Stabilizing Piles and Earth Pressure on Sheet Piles

Zhang¹,

Chen²,

Ma³

et al. 2019

JESTR

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The soil arching effect is an important premise for non-continuity structures (e.g., stabilizing piles) to produce continuous retaining and masking effects; pile spacing is closely related to this concept. A scientific and reasonable method to determine the pile spacing and earth pressure on sheet piles is necessary to design safe and economically feasible stabilizing piles. At present, theoretical analyses of reasonable pile spacing rarely consider the influence of lateral earth pressure. This study proposes a new method to determine a reasonable pile spacing and earth pressure on sheet piles conforming to engineering practices. The said method considers the influence of lateral earth pressure. First, a mechanical analysis model of soil arching was established. In this model, the most unfavorable sections at the arch foot and arch top were used as a control condition, and the problem of soil arching of stabilizing piles was summarized as a zero-value problem to solve the nonlinear equations. Extrema were searched using MATLAB, through which a reasonable pile spacing and soil arching equation were determined. Second, the earth pressure on the sheet pile was calculated from the soil arching equation. Finally, the proposed method was proven reasonable by combining engineering cases. The results show that the pile spacing significantly varies under different failure control conditions of the soil arching effect. In the proposed method, the calculated pile spacing is 8 m, which is between those obtained from two existing methods. This pile spacing is relatively reasonable. The earth pressure on the sheet pile is calculated by the integral method through a reasonable arch axis. The calculated soil range in the proposed method is closer to practice compared with those calculated via classical earth pressure theory and the original simplified granary method. Moreover, the earth pressure of the proposed method is appropriate. The proposed method is applicable to the design of sheet piles. Considering appropriate safety reserves, the proposed method can not only calculate the minimum pile spacing but also judge the reasonability of the designed pile spacing.

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Identification and Mitigation of Reservoir Landslides: Cases Studied in the Three Gorges Reservoir Area of China

Tang

2023

Progress in Landslide Research and Technology

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Reservoir landslides are one of the most common types of geohazards in reservoir areas. It is of great theoretical significance and engineering application value to carry out the identification and mitigation research of them. In the Three Gorges Reservoir area (TGRA), a series of studies were conducted on the reservoir landslides in aspects of their characteristics, evolution mechanisms, prevention and control, and forecasting by means of field investigation, monitoring and in-situ experiment, etc. Massive corpora of these research work are summarized and presented here in five aspects, with the goal of gaining insights into the effective prevention and mitigation of them: (1) the characteristics of the reservoir landslides located in the TGRA were summarized; (2) the stability evaluation methods of reservoir landslide include qualitative, limit equilibrium methods, numerical simulation methods and probabilistic methods were introduced; (3) the in-situ experiment on slipping zone soil of reservoir landslides carried out on the Huangtupo landslide was described; (4) the research progresses in reservoir landslide prevention and control was introduced; (5) the prospects of reservoir landslides forecasting based on physical-mechanical mechanism was elaborated. Based on the overview, suggests topics for future research are given to address the remaining challenges of reservoir landslides.

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Optimal isosceles trapezoid cross section of laterally loaded piles based on friction soil arching

Cited by 26 publications

References 32 publications

Analysis of pile spacing considering end-bearing soil arching and friction soil arching

Analysis of pile spacing considering end-bearing soil arching and friction soil arching

A New Method to Determine a Reasonable Pile Spacing of Stabilizing Piles and Earth Pressure on Sheet Piles

Identification and Mitigation of Reservoir Landslides: Cases Studied in the Three Gorges Reservoir Area of China

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