Grouting Archives - Moretrench

Structural Seepage

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Structural seepage grouting is the sealing off of flowpaths by grouting directly into defects (cracks, joints or open separation) in the floors, walls or roof of an underground structure. Since the work is typically accomplished under flowing water conditions, quick-acting water- reactive urethane grouts are commonly used. Cement- based materials and epoxies can be utilized as well.

Rock Curtain

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Rock curtain grouting is the filling of fractures and fissures in rock to reduce permeability, strengthen or stabilize the rock, or both. The grout curtain is constructed by the drilling and grouting of closely-spaced drill holes oriented to optimize the intersection of rock joints. The most common application is to reduce water seepage and pressure beneath a dam or other structure. Rock curtain grouting techniques are also utilized to control seepage beneath cut-off walls for deep excavations and shafts.

Compensation

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Fracture (or claquage) grouting is the intentional fracturing of the ground by high-pressure injection of cement- based grout through sleeve port pipes to form intertwined lenses or veins of grout in order to provide reinforcement and even some consolidation of the soil. When performed concurrently with underground construction such as soft ground tunneling, fracture grouting of the soils between the tunnel and overlying structures has the specific design intent of providing a controlled ground heave to compensate for potential structural settlement. Such an application of fracture grouting is referred to as compensation grouting.

Compaction

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Compaction or low mobility grouting involves the injection of a mortar-like, low slump grout to create bulbous masses which displace and densify the surrounding soil. Compaction grouting is commonly used to increase bearing capacity, arrest or reduce foundation settlements, mitigate liquefaction potential, remediate sinkholes, or stabilize karstic formations.

Permeation

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Permeation grouting is typically defined as the injection of a low-viscosity grout (sodium silicate, microfine cement, acrylate or polyurethane) into the pores of the soil without displacing or changing the soil structure to impart strength and/or reduce permeability. The characteristics of the ground are modified with the hardening or gelling of the grout. Depending on the requirements of the project, grout materials can be temporary or permanent.

Jet

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Jet Grouting uses high-pressure, high-velocity jets to hydraulically erode, mix and partially replace the in situ soil or weak rock with cementitious grout slurry to create an engineered soil-cement product of high strength and low permeability. Jet grouting can be performed above or below the water table and in soil conditions ranging from coarse sands and gravels to highly plastic clays. The three basic systems Moretrench employs are single-fluid, double-fluid and triple-fluid jet grouting. Selection of the most appropriate system is dependent on the in situ soil characteristics and the application. Read More.

Overview

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From sinkhole remediation to the mitigation of liquefaction potential, the field of grouting encompasses a diverse range of subsurface conditions and an equally diverse range of treatment methodologies. Grouting can be performed for a wide range of applications, including underpinning, water cut-off, excavation support, utility support, soil or slope stabilization, or hazardous waste containment. Moretrench’s grouting expertise includes jet, permeation, compaction, fracture, compensation, rock curtain, and structural seepage grouting. With more tools in the toolbox, state-of-the art equipment and in-depth expertise, Moretrench has the capability to handle any grouting project from emergency response water control grouting to large-scale foundation soil treatment.