Soil improvement experiences in Belgium: part I. Overview and dynamic compaction

Impe, William F. Van; Cock, F. De; Cruyssen, J. P. Van Der; Maertens, Jan

doi:10.1680/gi.1997.010302

Cited by 6 publications

(3 citation statements)

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“…It is also the basis for the study of ecosystem carbon cycles and carbon storage [3]. The accurate biomass monitoring of small-scale soil and water conservation forests is key to scientifically assessing their ecological service functions, such as soil conservation [4], water conservation [5], diversity conservation [6], and soil improvement [7], as well as laying the groundwork for a scientific response to climate change and to achieving carbon neutrality and carbon peaks [3].…”

Section: Introductionmentioning

confidence: 99%

Estimating the Aboveground Biomass of Robinia pseudoacacia Based on UAV LiDAR Data

Cheng,

Zhang,

Zhang

et al. 2024

Forests

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Robinia pseudoacacia is widely planted in the Loess Plateau as a major soil and water conservation tree species because of its dense canopy, complex structure, and strong soil and water conservation ability. The precise measurement of small-scale locust forest biomass is crucial to monitoring and evaluating the carbon sequestration functions of soil and water conservation vegetation. This study focuses on an artificial locust forest planted in the early 1990s in Caijiachuan Basin, Jixian County, Shanxi Province. A drone equipped with LiDAR was used to obtain point cloud data and generate a canopy height model. A watershed segmentation algorithm was used to identify tree vertices and extract individual trees. A relationship model between tree height, diameter at breast height, and biomass, combined with sample survey data, was established to explore the spatial distribution of biomass in the artificial locust forest at the level of the entire basin. The results show the following: (1) the structural parameters of locust extracted using UAV point cloud data have a good degree of fit and accuracy, and the recall rate is 72.7%; (2) the average error rate of the extracted maximum tree height value of locust is 7%, that of the minimum tree height value is 14%, and that of the average tree height value is 18%; (3) the average error rate of the extracted maximum diameter at breast height of locust is 15%, that of the minimum diameter at breast height is 37%, and that of the average diameter at breast height is 36%; and (4) the average error rate of the biomass estimation of locust calculated using point cloud data is 16.0%.

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Section: Introductionmentioning

confidence: 99%

Estimating the Aboveground Biomass of Robinia pseudoacacia Based on UAV LiDAR Data

Cheng,

Zhang,

Zhang

et al. 2024

Forests

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“…Geosynthetics have become a signifcant component in soil reinforcement because of advancements in polymer engineering and the development of innovative materials. Van Impe [7] was the frst to suggest covering a stone column with a geosynthetic material. Since then, numerous research studies have been conducted to use reinforced stone columns to enhance the properties of soft soil by researchers [8][9][10], whereas Fathi and Mohtasham [11] demonstrated the stone column by increasing the stifness of geosynthetic materials, improved soil stability, and load-bearing capacity.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of a Dual-Layer Geosynthetic-Encased Stone Column Installed in Soft Soil

Kumar

Nirola

et al. 2023

Advances in Civil Engineering

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Stone columns are being used to reduce soft soil settlement and increase load-carrying capacity. Since there is inadequate lateral support from the local native soil, soft soil undergoes excessive settlement under vertical loading. This issue is effectively resolved by suitably encasing stone column material by geosynthetic with significant axial stiffness, which provides the required additional confinement reported in the literature. In the current study, an effort has been made to examine the load settlement behaviour of the dual-layered geosynthetic-encased stone column (DL-GESC) under vertical loading. In order to simulate the behaviour of stone column-reinforced soft soil, a FEM analysis was performed using PLAXIS-3D and three-dimensional (3D) models made utilising the unit cell idealisation technique for a single column. The stone column diameter, spacing to diameter (s/d) ratio, and encasement layers were varied to determine their influence on load-settling behaviour. The vertical load-carrying capacity of the ground was significantly improved when an additional layer of geosynthetic encasement was inserted into the stone column as compared to SL-GESC. Improvement of 15–25% was observed for the analysis of a single column installed in soft clay, according to the result obtained. Improvement ratios have been discussed in detail for various encasement conditions.

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“…Los resultados fueron comprobados por medio de ensayos de cono de penetración, y en algunos casos también por ensayos presiométricos, y mostraron que se alcanzó una buena compactación para rellenos de arenas hidráulicas, pero no en las capas arcillosas y turbosas subyacentes. Actualmente este método también está siendo usado para consolidación de residuos urbanos (Van Impe et al, 1997). Sánchez-Alciturri (2000c), explica que las técnicas de mejoramiento más usadas en vertederos de residuos urbanos son la precarga y la compactación dinámica, obviando el caso de inclusiones rígidas (columnas de gravas y jet grouting), porque los métodos de diseño para vertederos parten de encomendar a las inclusiones toda la labor de transmisión de carga.…”

Section: 42-las Técnicas De Mejoramiento De Verterosunclassified

El comportamiento geomecánico deformacional de los residuos urbanos : aplicación a un caso real

Bastos¹

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Las características de heterogeneidad de los residuos sólidos urbanos así como la degradación biológica de sus componentes orgánicos influyen en los aspectos geotécnicos de los vertederos. La magnitud y duración de los asientos son factores muy importantes en el estudio del comportamiento de vertederos. La velocidad de asiento disminuye con el tiempo pero se mantiene durante muchos años después de su clausura. Para reducir los asientos del relleno, uno de los métodos de tratamiento que se utiliza es la compactación dinámica de los residuos sólidos. En este trabajo se estudia la mejora, a través de la compactación dinámica por impacto tipo "Menard", de un vertedero de residuos sólidos en Madrid y los asientos provocados por la aplicación de una sobrecarga.Se analiza el comportamiento de los residuos sólidos con tratamiento de mejora, así como la predicción de asientos a 10 años aplicando los modelos Sowers (1973), Yen & Scanlon (1975), Gandola et al. (1992) y Meruelo (1994.Palabras clave: vertederos, residuos sólidos urbanos, compactación dinámica en vertederos, asientos en vertederos, modelos de asientos en vertederos.

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Soil improvement experiences in Belgium: part I. Overview and dynamic compaction

Cited by 6 publications

References 0 publications

Estimating the Aboveground Biomass of Robinia pseudoacacia Based on UAV LiDAR Data

Estimating the Aboveground Biomass of Robinia pseudoacacia Based on UAV LiDAR Data

Numerical Analysis of a Dual-Layer Geosynthetic-Encased Stone Column Installed in Soft Soil

El comportamiento geomecánico deformacional de los residuos urbanos : aplicación a un caso real

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