Ground improvement by means of jet-grouting

1997 ◽  
Vol 1 (2) ◽  
pp. 65-85 ◽  
Author(s):  
P. Lunardi
Keyword(s):  
Ground Improvement ◽  
Jet Grouting

scholarly journals Numerical Analysis on Performance of the Middle-Pressure Jet Grouting Method for Ground Improvement

Geosciences ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 313
Author(s):  
Shinya Inazumi ◽  
Sudip Shakya ◽  
Takahiro Komaki ◽  
Yasuharu Nakanishi
Keyword(s):  
Life Cycle ◽  
Comparative Analysis ◽  
Ground Improvement ◽  
Cement Slurry ◽  
Mechanical Agitation ◽  
High Quality ◽  
Jet Grouting ◽  
Computer Aided ◽  
Improvement Method ◽  
Cae System

This study focused on the middle-pressure jet grouting method, which has a complicated development mechanism for the columnar soil-improved body, with the aim of establishing a computer-aided engineering (CAE) system that can simulate the performance on a computer. Furthermore, in order to confirm the effect of middle-pressure jet grouting with mechanical agitation and mixing, a comparative analysis was performed with different jet pressures, the development situation was visualized, and the performance of this method was evaluated. The results of MPS-CAE as one of the CAE systems showed that the cement slurry jet ratio in the planned improvement range, including the periphery of the mixing blade, by the middle-pressure jet grouting together with the mechanical agitation and mixing was increased and a high quality columnar soil-improved body was obtained. It is expected that the introduction of CAE will contribute to the visualization of the ground, and that CAE will be an effective tool for the visual management of construction for ground improvement and the maintenance of improved grounds during the life cycle of the ground-improvement method.

Jet-Grouting in Cohesive Soils for Ground Improvement in Hawaii

GeoRisk 2011 ◽  
2011 ◽  
Author(s):  
John Y. L. Chen ◽  
Robin M. Lim ◽  
Kyle Furuhashi
Keyword(s):  
Ground Improvement ◽  
Cohesive Soils ◽  
Jet Grouting

Thermochemomechanical Assessment of Ground Improvement by Jet Grouting in Tunneling

2003 ◽  
Vol 129 (8) ◽  
pp. 951-962 ◽  
Author(s):  
Christian Pichler ◽  
Roman Lackner ◽  
Yvonne Spira ◽  
Herbert A. Mang
Keyword(s):  
Ground Improvement ◽  
Jet Grouting

Field Design of Jet Grouting Parameters on Soilcrete Columns

2012 ◽  
Vol 170-173 ◽  
pp. 3068-3071 ◽  
Author(s):  
Shu Li Wang ◽  
Man Gen Mu ◽  
Dun Wu Chen ◽  
Geng Ren
Keyword(s):  
Water Flow ◽  
Ground Improvement ◽  
Deep Pit ◽  
Jet Grouting ◽  
Native Soil ◽  
Local Soil ◽  
Strength Improvement

Method of jet grouting has become one of the ground improvement technologies used to address seepage concerns and to provide strength improvement of soils. The soilcrete columns can be also used to form seepage vertical cut-off walls from a series of continuous and interconnected vertical columns in deep pit. If the native soil is not completely mixed with slurry, the resulting columns will have soil inclusions which can increase the permeability of the column or fail barrier to water flow. Specifications of soilcrete columns that are achieved from the jet grouting procedures from the diameter and strength aspect depend on jet grouting parameters such as grout pressure, lifting speed, number and diameter of nozzles and c/w ratio and specifications of local soil. Different soil must use different jet grouting parameters.

A field trial of jet-grouting in marine clay

2001 ◽  
Vol 38 (2) ◽  
pp. 338-348 ◽  
Author(s):  
Teoh Yaw Poh ◽  
Ing Hieng Wong
Keyword(s):  
Ground Improvement ◽  
Free Field ◽  
Earth Pressure ◽  
Soil Mass ◽  
Diaphragm Wall ◽  
Marine Clay ◽  
Jet Grouting ◽  
Strength And Deformation ◽  
Diaphragm Walls ◽  
Soil Movements

The basement excavation of the Singapore Post Center involved extensive jet-grouting to improve the soft marine clay present within the excavation. The treated soil mass, with much improved strength and deformation characteristics, was intended to act as an internal strut below the bottom of the excavation level, reducing movements caused by the basement excavation. This paper presents the performance of a well-instrumented field jet-grouting trial during the construction of the building basement. Results of monitoring suggest that the jet-grouting trial caused the retaining diaphragm walls and the adjacent soils immediately behind and at some distance away from the walls to move away from the jet-grouted area. The maximum free field lateral soil movements in the excavation side of the jet-grouted mass were much larger than the corresponding lateral movements behind the wall. The results suggest that the diaphragm wall provided considerable restraint, thereby reducing the lateral movements of the soil behind the wall induced by the jet-grouting. Bending moments were induced in the diaphragm walls due to the jet-grouting work. The jet-grouting also caused some increase in the lateral earth pressure and the piezometric levels.Key words: jet-grouting, ground improvement, diaphragm wall, ground movements.

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