Research on Influence of Water‐Cement Ratio on Reinforcement Effect for Permeation Grouting in Sand Layer

Li, Zhipeng; Zhang, Lianzhen; Chu, Ying‐Hao; Zhang, Qingsong

doi:10.1155/2020/5329627

Cited by 20 publications

(8 citation statements)

References 12 publications

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“…It must be sufficiently fluid to flow under pressure into the cracks of the rock up to the target volume where, after hardening, it must have the desired properties [13]. This grout, based on cement and water [14], may possibly contain mineral additions, adjuvants, and inert charge. A wide range of products is found on the market and are usually grouped into cement-based products without additions and with additions.…”

Section: B Formula Of the Injection Groutmentioning

confidence: 99%

Grout Curtain Construction at Tiddas Dam, Morocco

Tahar¹,

Bahi²,

Ouadif³

et al. 2022

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

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Dam foundations are generally affected by water leakage and seepage, posing a significant threat to the structure's safety. Such an artificial water reservoir unconditionally assumes a watertight foundation, as perfect as possible, to ensure its stability. This brings us back to thinking about an adequate treatment of the foundation through the injections of the grout curtain, which ensures the watertightness of the ground and a good drainage system, which together improve the unacceptable mechanical and hydraulic properties of the foundation. Our study focuses on the Tiddas Dam, a dam in the region of Khemisset located on the Bouregreg oued, intended to supply drinking and industrial water to the region of Rabat and Casablanca. It has been the subject of several geological and geophysical studies to characterize its foundation and the lithological variety known to the site. Environmental constraints and the development of a network of fractures and faults have made it necessary to think of an innovative solution for the waterproofing of the dam, especially on the right bank, ensured by a grout curtain of well-defined dimensions considering all the factors affecting this bank. The paper presents the particularities of the site, the constraints of the design of the grout curtain of a dam in a fractured environment, the choices of this design and the sizing methods used, as well as the appropriate grouting formula, which together could optimize the consistency of the grouting works.

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Section: B Formula Of the Injection Groutmentioning

confidence: 99%

Grout Curtain Construction at Tiddas Dam, Morocco

Tahar¹,

Bahi²,

Ouadif³

et al. 2022

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

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“…The compressive strength of the samples made from cement mortar can ensure that the error is within control. Furthermore, the static load acting on the structural plane can usually be regarded as the resultant force of the shearing load parallel to the structural plane and the normal load perpendicular to the structural plane [ 21 , 22 , 23 , 24 , 25 ]. To eliminate the influence of morphology or angle of structural planes and other variables, the artificial samples were designed with only one horizontal structural plane in the test.…”

Section: Samples Preparation and Experiments Schemesmentioning

confidence: 99%

Research on the Reasonable Grouting Strength of Rock-Like Samples in Different Strengths

et al. 2020

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One of the key points to make grouting reinforcement technology efficient and economical in engineering is to find out the optimal match relationship between different strengthsofrock mass and strength ofgrouting material. It can be called areasonable grouting strength. To explore that, 5 kinds of N (compressive strength of cement mortar) were used to make samples to simulate the different rock strengths. Five kinds of M (compressive strength of inorganic double-fluid material) were used to grout the structural plane of samples. Then the shearing experiment was carried out under the same normal stress conditions. Finally, based on the analyses of experimental results, the C (the reasonable range of grouting parameters) was proposed. The result shows that when M is the same, the smaller N is, the higher the τ(shearing strength of samples) growth rate is. When N is the same, with the increase of M, the growth rate of τ tends to zero. According to the shearing failure process and morphology of the samples, when N is the same, with the increase of M, the failure typeofsamples change from plastic flow failure to brittle sliding failure which is the same as the samples without the structural plane. C is equal to the ratio of M to N, and then the evaluation criteria of C is established by judging that if it is in the range from 1.19 to CMAX(CMAX = 0.0095N2 − 0.43N + 5.83). It will provide a certain basis to select the M in engineering in which N is known.

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“…Qian Ziwei [14] investigated the impact of factors such as grouting volume and static water pressure on the permeability coefficient and compressive strength of the medium through laboratory experiments. Based on sand layer grouting model tests, Li Zhipeng [15] studied the influence of factors such as particle size distribution, clay content, water-cement ratio, and grouting pressure on the compressive strength, deformation modulus, and permeability coefficient of reinforced bodies. They determined that the water-cement ratio is the main control factor affecting the effectiveness of grouting reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Mechanical Properties of Clay–Cement Slurry Containing Graphene Oxide

et al. 2023

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As a widely used material in underground engineering, clay–cement slurry grouting is known for its initial poor anti-seepage and filtration capacity, the low strength of the resulting stone body, and its tendency towards brittle failure. To explore efficient and environmentally friendly grouting materials, industrial-grade graphene oxide (GO) was incorporated into a clay–cement slurry to create a new type of slurry called a GO composite. These GO composites were then utilized to reinforce fractured formations. Uniaxial compression tests, shear strength tests, permeability tests, and electron microscopy scans were conducted to investigate the strength, permeability, and microscopic features of the GO composite-reinforced fractured formations. Furthermore, the optimization effect and application prospects of graphene oxide on clay–cement slurry materials were evaluated. The experimental results demonstrated that the modified slurry effectively improved the compressive strength (increased by 7.2% to 32.5%) and shear strength (increased by 28.6% to 105.3%) of consolidated fractured gravel. By conducting orthogonal experiments with range analysis, variance analysis, and multiple regression analysis, it was shown that there was a strong correlation between the consolidated body and three factors influencing the permeability coefficient. Among these factors, the OPC content had the most significant impact on the permeability coefficient, followed by the GO content. Graphene oxide was found to promote cement hydration reactions, guide the growth of hydration products on the surface of graphene oxide nanosheets, optimize the pore structure in grouting materials, and reduce microcracks between the slurry and the fractured gravel interface. Electron microscopy characterization and fractal analysis revealed that the addition of graphene oxide effectively reduced the degree of microdamage during the sample’s failure process. This ensured the integrity of the sample during the unstable failure process, enhanced the material’s toughness, and improved its ability to resist loads.

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Research on Influence of Water‐Cement Ratio on Reinforcement Effect for Permeation Grouting in Sand Layer

Cited by 20 publications

References 12 publications

Grout Curtain Construction at Tiddas Dam, Morocco

Grout Curtain Construction at Tiddas Dam, Morocco

Research on the Reasonable Grouting Strength of Rock-Like Samples in Different Strengths

Experimental Investigation of Mechanical Properties of Clay–Cement Slurry Containing Graphene Oxide

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