Excavation Support System Design Method to Limit Damage in Adjacent Infrastructure

Giraldo, Jorge Romana; Bryson, L. Sebastian

doi:10.1061/(asce)gt.1943-5606.0002677

Cited by 11 publications

(1 citation statement)

References 39 publications

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“…Designs now require controlling displacements and limiting movements [16]. It is required to change the approach to designing systems for fixing deep excavation, including the definition of permissible limits of movement, developing an optimal solution to maintain movements within acceptable values, and determining steps to mitigate the consequences in case of exceeding the allowable movements [17]. Excavation failures can result in displacements caused by various mechanisms that require appropriate safety factors to be implemented.…”

Section: Introductionmentioning

confidence: 99%

Rational design solutions for deep excavations using soil nail wall systems

Alkhdour,

Yasin,

Tiutkin

2023

Min. miner. depos.

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Purpose. The study aims to optimize the design and reduce soil nail length in deep excavations with a soil nail system in fast-draining soils. Additionally, it investigates the parameters influencing slope stability in fast-draining soils. Methods. Integrating field and lab data with soil nail properties and advanced modeling, this study investigates how fixed nail length, inclination and spacing affect the stability of a 20 m-deep excavation in fast-draining soil. Findings. The study findings reveal that optimal parameters, such as nail spacing and inclination angle, have been identified for reinforcing deep excavation walls, ensuring stability with minimal nail length. Notably, the stability of excavation walls can be achieved without the need to increase the length of the soil nails. The recommended parameters are characteristic of an 8-meter-long soil nail system, a 30-degree inclination angle, and a spacing of 1.5×1.5 meters. Originality. This study presents a novel perspective on the structural characteristics of soil nails by determining emphasizing nail spacing, inclination angle, and fixed nail length. It offers a comprehensive framework for designing soil nail walls in fast-draining soils during deep excavations, contributing to advancements in open-cut excavation practices. Practical implications. The study offers practical implications for designers involved in deep slope earthworks, enabling the development of efficient and rational design solutions that ensure excavation stability and prevent displacement during excavation while reducing costs and project duration.

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Section: Introductionmentioning

confidence: 99%

Rational design solutions for deep excavations using soil nail wall systems

Alkhdour,

Yasin,

Tiutkin

2023

Min. miner. depos.

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A Detailed Investigation on Contiguous Pile Wall with Homogeneous Backfill

Mishra

Sawant

2023

Geotech Geol Eng

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Performance Analysis of Axially Loaded Secant Pile Wall Embedded in Sand: An Experimental Investigation

et al. 2023

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In urban environments, temporary excavation support systems (ESSs) are intensively recommended during the construction process of structures with underground levels to preserve nearby structures and maintain the excavation sides. Once the foundations and basements are constructed, these systems are rendered useless. As a result, integrating the temporary ESS into the building foundation may have significant benefits. Therefore, the main aim of this paper was to investigate the behavior of Secant Pile Walls (SPWs) through fifteen model tests with an acceptable scale on an axially loaded SPW embedded in medium and dense sand. This study considered several factors to define wall behavior, such as normalized lateral deflection (δh/Ht%), the vertical deflection of the SPW (δvw/Ht%), vertical ground settlement (δv/Ht%), and settlement influence zone (Do). These factors were investigated and analyzed under the influence of a set of parameters including normalized penetration depth (He/Hc), sand relative density (Dr), and surcharge load density (Wsur). The findings demonstrated that SPWs had structural and overall stability features to withstand lateral earth pressures as well as applied axial loads. Generally, increasing the He/Hc ratio further than a limit value of 2.0 for the same surcharge load had a limited impact on the ultimate axial capacity, particularly in the case of dense sand. The location of the pivot point (ε′) extended from 0.24 to 0.41He from the wall tip, with a mean value of 0.34He and 0.29He for the values of Dr = 80 ± 2%, and 60 ± 2%, respectively. Other issues were also discussed for selected samples, including an analysis of the wall's bending moments and any potential wall buckling. Finally, to correlate the experimental data with the theoretical values, a modification factor for the pile static formula was developed by using nonlinear regression analysis with a significant prediction accuracy with an R2 of 0.94.

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Excavation Support System Design Method to Limit Damage in Adjacent Infrastructure

Cited by 11 publications

References 39 publications

Rational design solutions for deep excavations using soil nail wall systems

Rational design solutions for deep excavations using soil nail wall systems

A Detailed Investigation on Contiguous Pile Wall with Homogeneous Backfill

Performance Analysis of Axially Loaded Secant Pile Wall Embedded in Sand: An Experimental Investigation

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