Field Study on Soft Soil Improvement Using Continuous Flight Auger (Cfa) Piles

Hameedi, Mudhafar K.; Fattah, Mohammed Y.; Al-Kaream, Khalid W. Abd

doi:10.21660/2021.86.j2329

Cited by 9 publications

(4 citation statements)

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“…Dijkstra [12] introduces a CDC technique (Cofra Dynamic Compaction®) combined with soil replacement to support oil storage tanks. To enhance the mechanical properties of soft clay at an oil storage tank construction site, [13] presents soil improvement using CFA (continuous flight auger) piles before the tank's construction. Meanwhile, [14][15][16] conducts numerical analysis to evaluate the seismic performance of tank foundations improved with stone columns.…”

Section: Introductionmentioning

confidence: 99%

Retrofit Design of Tilted Water Tank: A Case Study at a Coal Power Plant

Suarjana

2024

GEOMATE

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A large steel water tank installed at a coal power plant in Cilegon, West Java, Indonesia, faced stability and strength concerns due to significant tilting observed during a water load test. As a precautionary measure, the tank was emptied, and a thorough assessment was initiated to evaluate its fitness for purpose and to determine the strength and stability of both the tank and its foundation for long-term use. The site investigation identified uneven settlement and tilting of the foundation. To conduct a root cause analysis, finite element analysis was performed, with soil properties calibrated based on measured settlement. The mapped deformation of the tank's base was compared to industry standards such as API 653, EEMUA 159, and PIP STE02030. The analysis revealed that the failure resulted from an error in calculating the strength of the base soil during the design phase. Fortunately, the tank itself did not sustain significant damage, experiencing only rigid body displacement with minimal out-of-plane deformation, rendering repairs unnecessary. A proposed retrofit solution to enhance the strength of the soil beneath the tank is to implement soil improvement by concrete jet grouting. Once the soil characteristics have been improved, a comprehensive finite element analysis confirmed that both the steel water tank and the reinforced soil surrounding it will remain within acceptable stress and deformation levels for both short-term and long-term conditions. Field measurements further validate that the application of concrete jet grouting has effectively reduced the settlement potential of the tank.

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Section: Introductionmentioning

confidence: 99%

Retrofit Design of Tilted Water Tank: A Case Study at a Coal Power Plant

Suarjana

2024

GEOMATE

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“…Ground cushions create a layer of non-collapsible soil in the foundation base. Another promising practice is the construction of fixed soil columns and piles in weak dusty-clayey soils with the combination of jetting and boring or jetting technology and the immersion of pre-reinforced concrete elements (Hameedi, Fattah and Abd Al-Kaream, 2021). Moreover, one of the effective methods of designing structures on collapsible soil is the reinforcement of foundation (Callai, Tataranni and Sangiorgi, 2021).…”

Section: Introductionmentioning

confidence: 99%

Practical experience in the construction of roads in difficult soil conditions

Tulebekova,

Zhussupbekov,

Zhankina

et al. 2024

Journal of Water and Land Development

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One of the most important and urgent problems is constructing roads in difficult soil conditions, ensuring their strength, reliability, and normal operation. To create an efficient and competitive transport infrastructure in Kazakhstan, the State Programme of Infrastructural Development “Nurly Zhol” for 2020–2025 was developed. Its main objectives are to improve the technological, scientific, and methodological base, provide resources, and to attract “Big Transit”. The paper presents the details of the survey carried out in one of road construction areas. Irrigation canals and periodic and permanent watercourses represent the hydrographic network of the construction site. The analysis of these features and field tests were included in the research. Stamp tests were performed to analyse mechanical properties of embankment soil to provide more reliable information on the mechanical properties of the soil. Structural and technological solutions were adopted based on the field tests and surveys of hydrological conditions. A numerical simulation was used to determine the stability of the road embankment, the results of which showed maximum deformations of 4.5 mm during the operation of road transport. Geosynthetic material was used to reinforce the subgrade. The results of the study have shown that the analysis of factors affecting the stability of engineering structures on difficult soil conditions helps to achieve some improvement.

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“…The construction of a ground cushion creates a layer of non-collapsible soil in the foundation base. Another method is the construction of fixed soil columns and piles in weak dusty-clayey soils, using combinations of jetting and boring methods or combining jetting technology with the immersion of pre-reinforced concrete elements, which also shows promise [17].…”

Section: Introductionmentioning

confidence: 99%

A Practical Solution for Improving Soil Bases Inproblematic Engineering Conditions

Tulebekova¹

2023

GEOMATE

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Improving the quality and efficiency of construction on problematic soil conditions largely depends on the correct assessment of their properties, the choice of foundations, and structural and technological solutions. This study presents a practical solution for improving soil bases using reinforcement as the chosen method of improvement. The effectiveness of the reinforcing element was established experimentally, which made it possible to identify the peculiarities of changing strength and deformation properties of ground bases reinforced with geosynthetic material, as well as the possibility of modeling destructive soils using a "quasi-soil" approach. Analysis of the influence of reinforcing geosynthetic material proved its positive effect on the properties of the ground. The calculation of the coefficient of relative collapse after reinforcing became 0.03. Geosynthetic material is not subject to rotting, or root penetration, the structure of the material provides good strength and filtering properties. Thus, the use of geosynthetic materials allows the improvement of the mechanical properties of soils in a targeted way.

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Field Study on Soft Soil Improvement Using Continuous Flight Auger (Cfa) Piles

Cited by 9 publications

References 0 publications

Retrofit Design of Tilted Water Tank: A Case Study at a Coal Power Plant

Retrofit Design of Tilted Water Tank: A Case Study at a Coal Power Plant

Practical experience in the construction of roads in difficult soil conditions

A Practical Solution for Improving Soil Bases Inproblematic Engineering Conditions

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