Fluid-Soil Interaction Model for Jet Grouting

Ho, Chu E.

doi:10.1061/40912(231)1

Cited by 21 publications

(13 citation statements)

References 1 publication

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“…Compared to MP1, which has a longer bonded length in the rock layer, the higher pile-soil interaction of WMP3 implies that the axial stiffness of WMPs is highly affected by the pile-soil interface stiffness and the soil strength in the upper ground layer. The shear keys generated along the WMP improve the pile-soil interaction and the stiffness of the pile-soil interface; the construction of such keys through the jet-grouting method, which has been demonstrated to be an effective ground improvement technique (Han et al 2007, Ho 2007, Ni and Cheng 2012, also improves the soil strength. These factors contribute to the higher axial stiffnesses of WMPs compared to Type A MPs.…”

Section: Axial Stiffness Of the Mpsmentioning

confidence: 99%

A field study on the load sharing behavior of a micropiled raft underpinned by a waveform micropile

2022

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A waveform microiple(WMP) uses jet grouting method to generate shear keys along the pile shaft for improving the shaft resistance and cost efficiency. In this study,field loading tests were performed in this study to characterize the load sharing behavior upon inclusion of a waveform micropile (WMP) in a group of four micropiled-raft. First, single-pile compressive loading tests were conducted on three WMPs and five Type A micropiles (MP). Subsequently, a group-pile loading test was performed on a piled raft comprising 2 × 2 MPs and a central WMP. The load–settlements, axial stiffnesses, and load transfer mechanisms of individual MPs were analyzed during the tests, including the short- and long-term effects of the axial stiffnesses of the MPs on the load sharing ratio of the micropiled-raft. The single-pile loading test results revealed that the shear keys along the WMPs caused its bearing capacities and axial stiffnesses to be 1.5 times and 2–5 times higher than those of MPs, respectively. In the micropiled-raft loading test, the load sharing ratios of the MPs increased with their axial stiffnesses, and the highest load sharing capacity was exhibited by the WMP, which constituted 30% of the total load and 2–3 times that of MPs. Moreover, the influence of raft on the load-sharing capacity should be considered as well.

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Section: Axial Stiffness Of the Mpsmentioning

confidence: 99%

A field study on the load sharing behavior of a micropiled raft underpinned by a waveform micropile

2022

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“…Many studies discussed the prediction of jet-grouted columns' diameters (e.g. Modoni et al 2006;Ho et al 2007;Shen et al 2013;Flora et al 2013). Theoretical studies summarize that, apart from jet-grouting parameters, the average diameter of jetgrout columns is related to soil properties such as permeability and strength.…”

Section: Statistical Characteristicsmentioning

confidence: 99%

“…As many prior studies have noted (e.g. Modoni et al 2006;Ho et al 2007;Shen et al 2013;Flora et al 2013), the diameter of jet-grout columns is affected significantly by various factors, such as soil type, strength, and permeability. More recently, data driven models can be found on the prediction of column diameter (e.g.…”

mentioning

confidence: 93%

Probabilistic investigations on the watertightness of jet-grouted ground considering geometric imperfections in diameter and position

Pan

Liu

et al. 2017

Can. Geotech. J.

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The effect of geometric imperfections in both diameter and position of jet-grouted columns on the watertightness of an underground cement-treated slab is investigated in this study. A three-dimensional discretized algorithm is proposed to facilitate the detection and measurement of untreated zones that penetrate the treated slab. The normalized flow rate of a cement-treated slab is then evaluated by calculating the harmonic average area of the penetrated defect. Statistical evaluation of the gross flow rate through the penetrated defects is carried out via Monte Carlo simulations. The results show that a more economic design is obtainable if intracolumn variation of diameter is considered or multi-shaft jet-grouting is used. Based on the statistical results, a reliability-based design method is proposed for designers to strike a balance among various design parameters, including slab thickness, depth, column diameter, and column spacing.

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“…erefore, it is essential to provide an accurate estimation of the ground displacement in the design stage. However, most researchers mainly focused on the prediction of diameter and strength of jet grouted columns [39][40][41][42][43][44], and there are few published literatures related to ground displacement caused by installation of jet grouted columns. Shen et al [31] proposed a method to calculate the lateral displacements caused by installing vertical jet grouted columns in clayey soils based on the analytical solution developed by Verruijt [45].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Ground Displacements Caused by Installing Jet Grouted Columns Using Machine Learning Methods

Wang

Peng

Liu

et al. 2020

Advances in Civil Engineering

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During the jet grouting process, large volumes of high pressurized fluids injected into the soils will cause significant ground displacements, which may bring harmful impacts on surrounding environment. Therefore, it is essential to provide an accurate estimation of the ground displacement in the design stage. Based on multiple nonlinear regression (MNLR) and support vector regression (SVR), the prediction approaches are established, respectively. The column radius (Rc), Young’s modulus (E), and distance from column center to target point (LOA) are selected as the input parameters, while the displacement of target point A at the radial direction (δA) is taken as the output parameter. Comparisons results on the prediction performance of ground displacements indicate that the MNLR-based approach has a better prediction effect. The design charts of the MNLR-based approach for predicting the ground displacement are created, which will be helpful for the practicing engineers to get a quick estimation.

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Fluid-Soil Interaction Model for Jet Grouting

Cited by 21 publications

References 1 publication

A field study on the load sharing behavior of a micropiled raft underpinned by a waveform micropile

A field study on the load sharing behavior of a micropiled raft underpinned by a waveform micropile

Probabilistic investigations on the watertightness of jet-grouted ground considering geometric imperfections in diameter and position

Evaluation of Ground Displacements Caused by Installing Jet Grouted Columns Using Machine Learning Methods

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