Geotechnical assessment and rehabilitation of retaining structures collapsed partially due to environmental effects

Öser, Cihan; Sayın, Barış

doi:10.1016/j.engfailanal.2020.104998

Cited by 10 publications

(2 citation statements)

References 13 publications

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“…In many cities of the world, this task is successfully implemented due to appropriate geotechnical conditions. A number of cities, including St. Petersburg, belong to regions with difficult conditions for the construction of underground structures, such as thixotropic fluid soils, a large number of faults in the underlying strata, as well as the proximity of groundwater to the surface, the presence of natural reservoirs within the city (rivers, canals), congestion of underground utilities and other adverse factors [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

The effect of negative temperatures on the retaining walls of deep pits

Metelkin

Paramonov²

2023

E3S Web Conf.

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In countries with negative winter temperatures, pits and walls of underground structures are subjected to additional forces caused by frost heaving forces. In Russian construction practice, cases of the impact of such forces on the struts and anchors of construction walls are known, which led to the loss of stability of the struts and the failure of the anchors. Obviously, the design of retaining walls in winter should take into account the effect of additional forces caused by frost heaving and their evolution over time. The solution of test problems for an open pit shows that under certain conditions, the forces in the struts can exceed their values by an order of magnitude, determined when taking into account only the active pressure of the soil. Experimental studies were carried out to assess the processes of development of forces in the elements of the retaining walls in winter. The calculated assessment of the temperature fields and the stress-strain state in the excavation walls was performed using the Termoground program. The comparison of results of experimental and calculated data are shown in the article. The comparison of results of experimental and calculated data is shown in the article.

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Section: Introductionmentioning

confidence: 99%

The effect of negative temperatures on the retaining walls of deep pits

Metelkin

Paramonov²

2023

E3S Web Conf.

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“…Therefore, anchors can also minimize the collapse of the ground when applying prestress in geotechnical structures [26,28,29,31]. Despite the use of various reinforcement methods, failure of the retaining structure can occur during excavation or due to various factors on the site [19].…”

Section: Introductionmentioning

confidence: 99%

Displacement mapping of point clouds: application of retaining structures composed of sheet piles

Zhao

Seo

Chen

2021

J Civil Struct Health Monit

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The measurement of displacement is an important factor to evaluate the stability of a retaining structure. In this paper, a large-scale retaining structure with a width of 70 m and a height of 6 m was monitored using 3-D laser scanning. Displacement mapping was proposed to globally monitor the entire retaining structure. The point cloud obtained immediately after the excavation was converted into the mesh, and the point clouds obtained on the second and seventh days after excavation were compared to the mesh using the Cloud to Mesh (C2M) comparison method. Since the C2M displacement can be underestimated in the inclined section of the sheet pile, after filtering using the azimuth and element angles automatically, only the flat sections of the sheet pile can be segmented from original point clouds collectively and consistently. The displacement mapping results identify not only the local behavior of the sheet pile, such as the bending point and the maximum displacement position, but also the global behavior, such as the expansion of the maximum displacement in the retaining structure. The results of the displacement mapping were confirmed through site investigation as well. In the displacement mapping result, the maximum displacement was found around rows 2 and 3 of the 37th sheet pile, and the analyzed result of the load cell installed on the anchor indicated that the anchor constructed in the 37th sheet pile shows the plastic behavior. It was established that other sheet piles are affected by the damage to the local anchor through the H-beam and the maximum displacement in the displacement mapping is expanded horizontally in a positive parabola shape. Therefore, it was confirmed that displacement mapping using laser scanning can complement existing monitoring techniques and can contribute to evaluating the behavior of a large-scale retaining structure during excavation.

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Progressive collapse analysis and robustness evaluation of a propped excavation failed due to inappropriate strut removal

Fang

Zheng

et al. 2023

Acta Geotech.

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Geotechnical assessment and rehabilitation of retaining structures collapsed partially due to environmental effects

Cited by 10 publications

References 13 publications

The effect of negative temperatures on the retaining walls of deep pits

The effect of negative temperatures on the retaining walls of deep pits

Displacement mapping of point clouds: application of retaining structures composed of sheet piles

Progressive collapse analysis and robustness evaluation of a propped excavation failed due to inappropriate strut removal

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