Improving the Bearing Capacity of Marine Clay using Polyurethane Columns

Yong, Aaron; Ahmad, Khursheed; Saleh, Samaila; Yunus, Nor Zurairahetty Mohd; Said, Khairun Nissa Mat

doi:10.1088/1755-1315/682/1/012023

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…Bearing capacity is the ability of the soil to support the weight of structures and vehicles safely and without shear failure in the event of deformation or severe settlement. If the natural soil has low bearing capacity and shear strength, it may not be able to support the loads of pavements or roads (Azhar et al, 2017;Che Mamat et al, 2019;Harianto et al, 2022;Hasyimi & Syahril, 2021;Prajudi & Syahril, 2021;Yong et al, 2021). An example of the situation of a soil with low bearing capacity and low shear strength is shown in Figure 2.…”

Section: Low Bearing Capacity and Shearmentioning

confidence: 99%

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Review of Subgrade Soil Stabilised with Natural and Synthetic Fibres

Nathen,

Arshad,

Rais

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Subgrade soil is an essential component in the design of road structures as it provides lateral support to the roadway. One of the main reasons for pavement failure is subgrade settlement, which leads to a loss of subgrade strength. If the mechanical properties of subsoils are lower than required, a soil stabilisation method may be an option to improve the soil properties of the weak subsoil. Soil stabilisation is one of the techniques for improving poor subsoil, which results in significant improvement in tensile strength, shear strength and bearing capacity of subsoil. Soil stabilisation can be broadly divided into four types: thermal, electrical, mechanical, and chemical. The most common method of improving the physical and mechanical properties of soils is stabilisation with binders such as cement and lime. However, soil stabilisation with conventional methods using cement and lime has become uneconomical in recent years, so an alternative such as fibres may be sought. This review provides a comprehensive comparison of the effectiveness of natural fibres and synthetic fibres in stabilising subgrade soils.

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Section: Low Bearing Capacity and Shearmentioning

confidence: 99%

“…Furthermore, it is now reported that approximately 2-8% of global electricity consumption is attributed to the cement manufacturing process (Kim et al, 2018;N. Mohamad et al, 2021;Nilimaa, 2023;Yong et al, 2021). Therefore, there is a need to look for an alternative soil stabiliser such as fibre.…”

Section: Introductionmentioning

confidence: 99%

Review of Subgrade Soil Stabilised with Natural and Synthetic Fibres

Nathen,

Arshad,

Rais

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Polyurethane columns can be used to increase the bearing capacity of marine clay, according to Yong et al [19]. The results demonstrated that as the PU columns' length increased, increasing the marine clay's ultimate bearing capacity.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling for stability of homogeneous clay and sand slopes improved by polyurethane foam piles in slope face

Hassona,

Hakeem

2024

J. Umm Al-Qura Univ. Eng.Archit.

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Polyurethane foam (P.U.) injection resin techniques have been widely used for slab crack repair, soil improvement, and structural crack repair over the past 20 years. In this study, numerical investigations were carried out to enhance the strength of both sand and clay soils via utilizing polyurethane foam as inclusion material. The investigation was conducted using ‘GeoStudio (SLOPE/W) 2D’ software to model 6 m high homogeneous slopes made of soft clay and medium sand with varying slope angles (25°, 30°, 35°) on same soil extended up to 9 m depth and with inclusion of polyurethane foam piles of varying diameter (0.5 m, 0.8 m), length (up to 10 m) and spacing (0.5 m, 1 m, 2 m) in the slope face. The numerical model was verified using experimental test results conducted by Hassona and Abdelnaeem (Physical and mechanical properties of polyurethane foam conditioned sand. MSc, Civil Engineering Department, Faculty of Engineering Minia University). The results revealed that, for slope angle, Ø = 30°, the factor of safety for clay soil increased when using polyurethane piles (diameter, 0.5 m and 10 m length) having spacing of two m, one m, half m, and when used as sheet piles, respectively. The factor of safety for clay soil increased significantly when using polyurethane piles (diameter, 0.8 m, and 10 m length) having spacing the same as before and as sheet piles having width of 0.5 and 0.8 m, respectively. Also, for medium dense sand soil, using polyurethane piles (diameter, 0.5 m and 10 m length) having spacing the same as before, and as sheet piles increased factor of safety much more than that for clay soil. In addition, for medium dense sand soil similar observation were noticed using polyurethane piles (diameter 0.8 m, and 10 m length) having spacing the same as before, and as sheet piles, respectively. In addition, the effects of slope angles also studied.

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Impermeability Characteristics of Treated Marine Soft Soil with Ferronickel Slag Powder

Chen

Tong

2022

Geofluids

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In order to study the law of evolution of erosion time on the impermeability of soil-cement in the marine environment, permeability tests, X-ray diffraction (XRD) tests, and scanning electron microscopy (SEM) tests were conducted on ferronickel slag powder (FSP) soil-cement. The changes in the permeability properties of the soil-cement under different soaking age conditions were investigated. The results show that the marine environment has little influence on the impermeability of soil-cement at an early age, and that their permeability coefficient is essentially identical to that of clear water. The impermeability of soil-cement in the marine environment decreases significantly after 28 days, and it continues to decrease with age. However, the deterioration in impermeability of soil-cement caused by the marine environment can be alleviated after FSP is added to the soil-cement, and a better mixing value of 40% is obtained. At the same time, the regression curve equation of the permeability coefficient of soil-cement with the change of age is established. FSP exerts a microaggregate effect and chemical activity in the soil-cement. It not only improves the compactness of the soil-cement matrix but also prevents the penetration of corrosive ions into the soil-cement, thereby improving the impermeability of the soil-cement.

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Improving the Bearing Capacity of Marine Clay using Polyurethane Columns

Cited by 3 publications

References 19 publications

Review of Subgrade Soil Stabilised with Natural and Synthetic Fibres

Review of Subgrade Soil Stabilised with Natural and Synthetic Fibres

Numerical modelling for stability of homogeneous clay and sand slopes improved by polyurethane foam piles in slope face

Impermeability Characteristics of Treated Marine Soft Soil with Ferronickel Slag Powder

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