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Pressure Model Study on Synchronous Grouting in Shield Tunnels Considering the Temporal Variation in Grout Viscosity

open access: yesApplied Sciences, 2023
The grout pressure in the shield tunnel tail void during synchronous grouting is the key to controlling ground settlement and restraining the segment. However, the circumferential, longitudinal, and radial distribution of grout pressure considering the ...
Jun Ma   +6 more
doaj   +2 more sources

Effects of bolt profile and grout mixture on shearing behaviors of bolt-grout interface

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2020
Shearing behavior and failure mechanism of bolt-grout interface are of great significance for load transfer capacity and design of rock bolting system. In this paper, direct shear tests on bolt-grout interfaces under constant normal load (CNL) conditions
Chuanqing Zhang   +4 more
doaj   +2 more sources

A review of grout materials in geothermal energy applications

open access: yesInternational Journal of Thermofluids, 2021
Ground heat exchangers are surrounded by grout material, making it one of the most important components in geothermal energy applications since it significantly affects the system's thermal performance.
Montaser Mahmoud   +6 more
semanticscholar   +1 more source

Influence of Coupling Effects between Gravel Soil Porosity and Cement Grout Weight on Diffusion Laws and Morphologies of Penetration Grouting

open access: yesApplied Sciences, 2022
The practice and theory of grouting engineering show that both injected medium porosity and grouting fluid weight play an important influence on the diffusion law and morphology of penetration grouting.
Zhiquan Yang   +10 more
semanticscholar   +1 more source

Assessment of Post-Tensioned Grout Durability by Accelerated Robustness and Corrosion Testing

open access: yesConstruction Materials, 2023
The corrosion of steel in post-tensioned tendons has been associated with deficient grout materials containing high free sulfate ion concentrations. In a Florida bridge in 2011, tendon corrosion failures occurred for a prepackaged thixotropic grout that ...
Samanbar Permeh, Kingsley Lau
doaj   +1 more source

Full-scale pullout tests of rock anchors in a limestone quarry focusing on bond failure at the anchor-grout and grout-rock interfaces

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2023
Rock anchors are a common safety measure for stabilising large-scale infrastructure, such as bridge towers, retaining walls, rock slopes and windmills. There are four principal failure modes for rock anchors: (a) tensile failure of the steel anchor, (b ...
Bjarte Grindheim   +2 more
doaj   +1 more source

Moisture and ion mobilization and stratification in post-tensioned (PT) grout during hydration

open access: yesCase Studies in Construction Materials, 2021
Mobilization and stratification of ions and moisture in post-tensioned tendons during grout hydration can create adverse conditions which can promote corrosion.
Samanbar Permeh   +2 more
doaj   +1 more source

Effects of Polypropylene Fibers and Measurement Methods on the Yield Stress of Grouts for the Consolidation of Heritage Masonry Walls

open access: yesFluids, 2020
The injection of grouts is a consolidation technique suitable for overcoming the structural deterioration of old stone masonry walls. Grouting operations involve introducing a suspension (grout) into a masonry core with the aim of improving the load ...
Luis G. Baltazar   +2 more
doaj   +1 more source

Influence of Defoamer on the Properties and Pore Structure of Cementitious Grout for Rebar Sleeve Splicing

open access: yesBuildings, 2023
Grout sleeve splicing of rebar is a major technology in prefabricated buildings, and cementitious grout for rebar sleeve splicing (hereinafter called grout) is an essential material for this technology.
Chunhua Huang   +3 more
doaj   +1 more source

Effects of grout injection techniques in pressure grouted soil nail system [PDF]

open access: yesE3S Web of Conferences, 2019
The use of pressure grouting techniques in the soil reinforcement system is frequent as it has many advantages over gravity grouting. Pressure grouting can be injected by pressure and volume (flow) controlled techniques. A preliminary study was conducted
Zahidul I. Bhuiyan Mohammad   +4 more
doaj   +1 more source

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