Fine cement grout injection: discrete numerical modeling

2017 ◽  
pp. 165-171
Author(s):  
S. Bortal-Nafaa ◽  
D. Gouvenot
Keyword(s):  
Numerical Modeling ◽  
Cement Grout ◽  
Grout Injection

scholarly journals Simulating the Filtration Effects of Cement-Grout in Fractured Porous Media with the 3D Unified Pipe-Network Method

Processes ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 46 ◽  
Author(s):  
Zizheng Sun ◽  
Xiao Yan ◽  
Weiqi Han ◽  
Guowei Ma ◽  
Yiming Zhang
Keyword(s):  
Porous Medium ◽  
Cement Grout ◽  
Pipe Network ◽  
Grout Injection ◽  
Two Phase ◽  
Penetration Process ◽  
Fractured Porous Medium ◽  
Fractured Medium ◽  
Network Method ◽  
Porosity And Permeability

In grouting process, filtration is the retention and adsorption of cement-grout particles in a porous/fractured medium. Filtration partly/even completely blocks the transportation channels in the medium, greatly decreasing its permeability. Taking into account filtration effects is essential for accurately estimating the grout penetration region. In this paper, the 3D unified pipe-network method (UPM) is adopted for simulating 3D grout penetration process in a fractured porous medium, considering filtration effects. The grout is assumed to exhibit two-phase flow, and the filtration effects depend on not only the concentration and rheology of the grout but also the porosity and permeability of the fractured porous medium. By comparing the model with the experimental results, we firstly verify the proposed numerical model. Then sensitivity analysis is conducted, showing the influences of grout injection pressures, the water–cement ratios of grout (W/C) and the grout injection rates on filtration effect. Finally, the grout filtration process in a complex 3D fractured network is simulated, indicating that the size of the grout penetration region is limited due to filtration.

scholarly journals Evaluation of soil replacement and cement grout injection in soil settlement

2021 ◽  
Vol 1 (2) ◽  
pp. 72-79
Author(s):  
Arief Andriansyah ◽  
Lusmeilia Afriani ◽  
Dyah Indriana Kusumastuti ◽  
Endro P. Wahono
Keyword(s):  
Bearing Capacity ◽  
Soil Stabilization ◽  
Soil Classification ◽  
Cement Grout ◽  
Sieve Analysis ◽  
Grout Injection ◽  
Toll Road ◽  
Dynamic Cone Penetrometer ◽  
Road Project ◽  
Soil Settlement

This paper discusses the process of original soil stabilization in Trans Sumatra Bakauheni-Terbanggi Besar Toll Road Project Package 2 Sidomulyo-Kotabaru. The soil replacement process was conducted at approximately 24 kilometres along the toll’s main road. The original soil bearing capacity analysis stage was by performing a Dynamic Cone Penetrometer (DCP) and Sondir test to analyze the deep of hard soil. A soil replacement was carried out to replace the original soil with soil that has appropriate specification. the piling up process was conducted in stages, which has Sandstone in such of the layer. The research done about the landfill sample was retaken and collected at 68 points. The stockpile soil samples collection was then followed by the analysis which was conducted in the laboratory to find the soil bearing capacity. There are 4 types of bearing capacity parameters analyzed, namely specific gravity, water content, aggregate analysis (Sieve Analysis), and consistency limit (Atterberg Limit). Referring to it, then there was the classification of soil types according to AASHTO M145 & Casagrande Soil Classification System. A point that has settlement after soil replacement is STA 52+000. So, there need to add soil stabilization, that is cement grout injection. Researchers analyzed the soil settlement by interpretation method. Results showed that soil replacement and cement grout injection could decrease a soil settlement by about 15.07 cm to become 0.93 cm.

Numerical Modeling of Traditional Masonry Walls Strengthened with Grout Injection

2019 ◽  
Vol 14 (10) ◽  
pp. 1517-1532
Author(s):  
Bilge Doran ◽  
Nabi Yuzer ◽  
Selen Aktan ◽  
Didem Oktay ◽  
Serhan Ulukaya
Keyword(s):  
Numerical Modeling ◽  
Masonry Walls ◽  
Grout Injection

Investigation of Morphosedimentary Processes on a Schematic Louisiana Barrier Island Using Process-Based Numerical Modeling

2007 ◽  
Author(s):  
T. Campbell ◽  
B. de Sonneville ◽  
L. Benedet ◽  
D. J. W. Walstra ◽  
C. W. Finkl
Keyword(s):  
Numerical Modeling ◽  
Barrier Island

SIMULATION OF ELECTRICAL MONITORING OF DAMS WITH LEAKAGE WITH A TRANSVERSE PLACEMENT OF THE MEASURING INSTALLATION

2020 ◽  
Vol 8 (4) ◽  
pp. 69-82
Author(s):  
D.S. Rakisheva ◽  
◽  
B.G. Mukanova ◽  
I.N. Modin ◽  
◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Water Level ◽  
Electrical Resistivity Tomography ◽  
Resistivity Tomography ◽  
Measuring Installation ◽  
Basic Functions ◽  
Tomography Method ◽  
Dam Monitoring ◽  
The Mathematical Model ◽  
Measurement Line

Numerical modeling of the problem of dam monitoring by the Electrical Resistivity Tomography method is carried out. The mathematical model is based on integral equations with a partial Fourier transform with respect to one spatial variable. It is assumed that the measurement line is located across the dam longitude. To approximate the shape of the dam surface, the Radial Basic Functions method is applied. The influence of locations of the water-dam, dam-basement, basement-leakage boundaries with respect to the sounding installation, which is partially placed under the headwater, is studied. Numerical modeling is carried out for the following varied parameters: 1) water level at the headwater; 2) the height of the leak; 3) the depth of the leak; 4) position of the supply electrode; 5) water level and leaks positions are changing simultaneously. Modeling results are presented in the form of apparent resistivity curves, as it is customary in geophysical practice.

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