Soil Arching Effect in Sand Reinforced with Micropiles Under Lateral Load

Mujah, Donovan; Hazarika, Hemanta; Watanabe, Naoto; Ahmad, Fauziah

doi:10.1007/s11204-016-9379-3

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…When reinforcing landslides, they play a role similar to that of retaining walls, in addition to improving the shear strength of landslides. Due to its structural characteristics of small pile diameter and high density of pile placement, the soil arch structure is formed between piles and multiple rows of piles work together to form a core antislip body [7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Pile-Soil Combined Effect of Micropiles in Strengthening Expansive Soil Landslide in Southern Shaanxi Based on the Dynamic Soil Arch Model

Ding

et al. 2022

Advances in Materials Science and Engineering

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Southern Shaanxi region is mountainous and landslide disasters are frequent. Micropile reinforcement technology is widely used in landslide management, especially in landslide emergency rescue projects, due to easy construction, small soil disturbance, and strong site adaptability. Soil arch effect is an important prerequisite for safe and economic performance of the support function of micropile. For the swelling soil landslide of the accumulation layer in southern Shaanxi, firstly, a numerical model is established by means of thermal-mechanical coupling of FLAC3D to explore the variation of the soil arch form with different swelling forces. Then, two theoretical models are proposed under normal working condition and rainfall working condition. The evolution and failure mode of soil arch are analyzed. The results show that the soil expansion after rainfall causes the change of the soil arch mode, the range of pile-soil interaction is obviously reduced, and the soil arch effect is weakened. It should be considered in the design of micropiles in strengthening expansive soil landslide.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Pile-Soil Combined Effect of Micropiles in Strengthening Expansive Soil Landslide in Southern Shaanxi Based on the Dynamic Soil Arch Model

Ding

et al. 2022

Advances in Materials Science and Engineering

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“…The first category involves studying fundamental issues, such as soil arching formation mechanisms, evolution laws, pile-soil interactions, load-sharing laws, etc., through model tests, theoretical analyses, and numerical simulations [12][13][14][15][16][17][18]. The soil arching effect was first discovered by Kang et al [12] with the trap-door test, which was further developed and validated by Liu et al [19], Al-Naddaf [20], Pardo et al [21], and Pulko et al [22]. The second category of research is related to the establishment of a mathematical or numerical model based on the principle of soil arching for analysis of engineering application issues, such as rational pile spacing, the ultimate bearing capacity of anti-slide piles, and the stability of reinforced slopes [8,10,11,23,24].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Dynamic Evolution Characteristics of Soil Arching and the Rational Spacing of Anti-Slide Piles

Zhong

Zhang

2022

Sustainability

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In order to analyse the dynamic evolution characteristics of soil arching during sliding processes, we conducted a series of model push-pile and direct shear tests. The tests’ results were used to design a relative displacement monitoring system and to introduce two dimensionless parameters (the push–compaction ratio (e) and the different degrees of push–compaction (t)) to investigate the degree of uneven soil deformation during the sliding processes. This innovative method was used to analyse the rational spacing between adjacent anti-slide piles. The results revealed that there was a push-to-compaction effect in sliding soil during the sliding process. Firstly, in terms of space, the gradual transfer characteristics of the landslide thrust and push-to-compaction effect, rather than a uniform deformation over the entire area, were revealed. In terms of time, the results demonstrated a law for the variation in push-to-compaction ratios: The expansion of e occurred earlier in the rear sliding body than in the front e, while the growth rate of front e was faster than that of e in the rear sliding body. The dynamic evolution process was divided into three stages: an elastic formation stage, a plastic development stage, and a failure stage. Secondly, during the sliding process, the shear strength parameters of the sliding soil did not have constant values but underwent a dynamic process of strengthening, and cohesion responded more efficiently than friction. Finally, the degree of mobilisation of the anti-sliding effect of the sliding soil can be used as a new means of quantitative analysis for rational spacing. The results indicated that the rational spacing between adjacent piles should be five times the width of the pile.

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“…Furthermore, Zhang et al [24][25][26] studied landslides in the reinforced soil arch by antisliding piles. Bosscheret al [27,28] studied the soil arch in Sandy. Deb et al [29,30] established a soil arch model.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study between Polyline and Straight Line Arrangements of Antislide Piles Based on Soil Arching Effect

Dai

Fayou

Zhang

et al. 2022

Advances in Civil Engineering

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Considering the limitations of terrain and engineering expenses, antislide piles are sometimes arranged in polylines. Studies show that this arrangement adversely affects the mechanical characteristics of antislide piles. However, there is no in-deep understanding of this issue and the structural design and calculation method of this arrangement have not been discussed in relevant standards. Aiming at resolving this shortcoming, the polylines pile arrangement is studied in this article to provide a scientific basis for designing and calculating antislide piles. To this end, the cantilever pile is taken as the research background, and the soil arching effect between piles is taken as the research object. Then the performances of the single-row polyline pile layout and straight line pile layout are analyzed in the Dawanjiang landslide and the results are verified from the aspects of the landslide reinforcement and the influence on the antislide pile structure. The obtained results show that the polyline pile layout is disadvantageous to the safety of the antislide pile structure, and the soil arch between piles under the polyline pile layout condition is not uniform. Meanwhile, it is found that as the polyline pile layout angle increases, the stress concentration appears at the “inflection point.” Under this circumstance, the soil arch between piles is not uniform, and the stress concentration intensifies.

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Soil Arching Effect in Sand Reinforced with Micropiles Under Lateral Load

Cited by 9 publications

References 12 publications

Analysis of the Pile-Soil Combined Effect of Micropiles in Strengthening Expansive Soil Landslide in Southern Shaanxi Based on the Dynamic Soil Arch Model

Analysis of the Pile-Soil Combined Effect of Micropiles in Strengthening Expansive Soil Landslide in Southern Shaanxi Based on the Dynamic Soil Arch Model

An Experimental Study on the Dynamic Evolution Characteristics of Soil Arching and the Rational Spacing of Anti-Slide Piles

A Comparative Study between Polyline and Straight Line Arrangements of Antislide Piles Based on Soil Arching Effect

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