An overview of the model container types in physical modeling of geotechnical problems

Esmaeilpour, P.; Mamazizi, Arman; Madabhushi, Spg

doi:10.1016/j.soildyn.2023.107827

Cited by 13 publications

(3 citation statements)

References 74 publications

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“…The determination of the scale was based on the experimental scale by considering the laboratory capacity, test tubes and sample material, as well as supporting literature based on previous research (Alfani et al, 2022). In building scaling, there were no definite criteria regarding the scale range used, but most laboratory experiments have been successful with a scale range of 1:10 to 1:50 depending on the tested parameters and laboratory capacity (Esmaeilpour et al, 2023). Also, micro-piles testing as a reinforcement for shallow foundations on soft soils to increase ultimate bearing capacity used a scale value of 1:30 where 1 cm in the laboratory represents 30 cm in field or actual conditions, as shown in Table 1.…”

Section: Methodsmentioning

confidence: 97%

Increasing the Bearing Capacity of Shallow Foundations on Soft Soil After the Installation of Micro-Piles

Isnaniati,

Mochtar

2023

jcef

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The bearing capacity of shallow foundations on soft soils can generally be estimated based on Local Shear Failure (Terzaghi theory). Several researchers previously stated that the installation of micro-piles on the failure area (slide) can increase the shear strength of the soil. This can be followed up by providing micro-pile reinforcement to prevent lateral soil movement. Therefore, this research was conducted to increase the bearing capacity of shallow foundations on medium-consistency soft clay soils that have been reinforced with micro piles. The research was conducted using modeling in the laboratory with a scale of 1:30. The soil sample used was kaolin clay made from slurry made from kaolin powder with a water content (wc = 1.77 LL), liquid limit (LL = 62.35%) and sample diameter (d = 33 cm). The slurry was formed by compacting at a medium consistency level with an undrained cohesion value (cu = 0.397 kg cm-2). The micro-pile material in the form of apus bamboo was installed, varying in diameter (d) 0.2 cm (0.027 B), 0.3 cm (0.04 B), and 0.5 cm (0.07 B); sum (n) 4, 9, 16, and 25; and length (L) 10 cm (1.33B), 13 cm (1.73B), and 16 cm (2.13B) micro-piles. While the foundation model uses a squarefoundation B x B with B = 7.5 cm. The tests were carried out before and after the micro-piles were reinforced with a soil shear failure test. The results showed that a decrease of 0.1B caused an increase in the ultimate bearing capacity of the micro-pile (qult-empirical, 0.1B) from the ultimate bearing capacity before installing the micro-pile. This value is then used to determine the ultimate bearing capacity ratio so that Rq,0.1B = qult-empirical,0.1B/qult-Terzaghi with the optimum bearing capacity ratio occurring at Rq,0.1B with n3 = 16, d2 = 0.04B, L2 = 1.73B.

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Section: Methodsmentioning

confidence: 97%

Increasing the Bearing Capacity of Shallow Foundations on Soft Soil After the Installation of Micro-Piles

Isnaniati,

Mochtar

2023

jcef

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“…Neoprene rubber specifications based on test results by the Indian Rubber Manufacturers Research Association (IMRA) based on ASTM D395 standards for 35% compression test, ASTM D412 for 17 MPa Tensile test, ASTM D2240 for Durometer 65 ± 5 HA hardness test, and ASTM D297 for composition test Chemical Ash Content 8-12% [20]. The test was carried out with specimens in the form of neoprene rubber sheets with a thickness of 3mm, length of 10m, and width of 1m [21].…”

Section: A Neoprene Rubber (Polychloroprene/cr)mentioning

confidence: 99%

Increasing the Quantity and Quality of GeNose 19 Medical Device Gaskets Using Piercing Tools

Khoryanton,

Nugroho,

Fitrianti Sugiono

et al. 2024

Int. J. Adv. Sci. Eng. Inf. Technol.

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The Ge Nose C19 medical device gasket is a product from a manufacturing company in Yogya. Gaskets must be of good quality to ensure vacuum or prevent air leakage from entering the test chamber. The core problem in the production process is the quality problem of many rejects and the quantity not yet meeting the production target. The observation results show that the gasket reject problem is found in the four holes that are formed, which do not match the dimensions or are torn. Making four holes in the gasket made from neoprene rubber is done through a drilling process, which can risk tearing or damage. The type of drill bit used can affect the success of drilling gasket holes. The process of making four holes in the gasket using the piercing method is thought to be able to increase the quality and quantity of gasket products. This research aims to increase the quantity and quality of Ge Nose 19 medical device gaskets using a piercing tool. Research methods include problem identification, literature study, design, manufacture, and testing of piercing tools. The test parameters are time and product quality, namely the shape and position of the hole. The results of this research show a reduction in the cycle time of the hole-making process by 53.7%, so production capacity has increased by 51.8%. The quality of gasket production has increased; of the 40 samples tested, 0 gaskets were rejected.

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“…To achieve the planned specimen characteristics (cu) of 0.211 kg/cm 2 and a water content (wc) of 58.631%, the slurry needed to be subjected to an effective stress load (σp') of 114,149 kN/m 2 over a timeframe (t) of 5 to 7 days. In this laboratory study, a 1/30 scale was adopted, consistent with the field scale used by Alfani et al [18,19]. The resulting clay soil test object, obtained through loading, had a diameter (ds) of 0.33 m and a height (Hs) of 0.185 m. The loading process of the slurry is visually represented in Fig.…”

Section: Manufacture Of Test Objectsmentioning

confidence: 99%

Effectiveness of Micro-Pile Installation Configuration for Increasing the Ultimate Shallow Foundation Bearing Capacity on Soft Clay Soil

2024

GEOMATE

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Soft clay soil is known for low bearing capacity and is prone to soil collapse under shallow foundations through Local Shear Failure. An approach to enhance the load-bearing capacity of such soil is by adopting micro-piles as reinforcement. This study aims to determine the effectiveness of micro piles in strengthening shallow foundations on soft clay soil through laboratory-scale testing. The soft soil used comes from kaolin clay characterized by a cohesion (cu) of 20.692 kN/m 2 and water content (wc) of 58.631%. These properties guided the crafting of test specimens, formed with a diameter (ds) of 0.33m and a height (Hs) of 0.185m. Micropiles were constructed from bamboo with varying numbers (n = 4, 9, 16, 25), lengths (L1= 1.33B, L2= 1.73B, L3= 2.13B), and diameters (d1= 0.03B, d2 = 0.04B, d3= 0.07B). The shallow foundation model with a square shape of BxB (where B=0.075 m), incorporated diverse configurations for the installation of micro-piles (K1, K2, K3). The results showed that more micro-piles (n) led to a higher bearing capacity ratio at a 0.1B reduction (Rqult-mp). The most significant enhancements occurred with the longest micro-piles (L3 = 2.13B), the highest number (n4 = 25), and a diameter of 0.04 B. Additionally, configurations including micro-piles installed beneath and extending up to the foundation's edge (K1 and K2) exhibited significant enhancement in Rq0.1B for identical micro-piles numbers (n). The installation of micro-piles beyond the foundation perimeter did not yield substantial increases in Rq0.1B and, therefore, is not recommended.

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An overview of the model container types in physical modeling of geotechnical problems

Cited by 13 publications

References 74 publications

Increasing the Bearing Capacity of Shallow Foundations on Soft Soil After the Installation of Micro-Piles

Increasing the Bearing Capacity of Shallow Foundations on Soft Soil After the Installation of Micro-Piles

Increasing the Quantity and Quality of GeNose 19 Medical Device Gaskets Using Piercing Tools

Effectiveness of Micro-Pile Installation Configuration for Increasing the Ultimate Shallow Foundation Bearing Capacity on Soft Clay Soil

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