grout curtain

[′grau̇t ‚kərt·ən]

(engineering)

A row of vertically drilled holes filled with grout under pressure to form the cutoff wall under a dam, or to form a barrier around an excavation through which water cannot seep or flow.

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grout hole

References in periodicals archive ?

Phase 2 - construction of an earthen dam on richland creek approx 125 LF in height and approx 4,150 LF in length, including dewatering, excavation, grout curtain, earthfill, cutoff wall, principal outlet structure & pipe, seepage drains, stilling basin, erosion & sedimentation control, appurtenances, and all other work.

Richland creek dam and reservoir

It was concluded that upstream blanket is very efficient as compared to grout curtain in controlling seepage on downstream of Khanpur Dam (Farooq et al.

EVALUATION OF SEEPAGE REDUCTION MEASURES UNDER DAM FOUNDATIONS USING GEO-STUDIO

A common method to rehabilitate a dam is to create a seal--a concrete wall or a grout curtain, for example--usually accomplished by drilling boreholes up to 100 m or more deep, then injecting grout into the holes to seal any cavities.

Water-powered drill technology offers benefits for tailings dam rehab

The project originally called for sealing 440 manholes by creating a grout curtain around each structure.

Efficient, economical grout solution for Downers Grove: reducing sewer line I/I with grouting allows sanitary district to avoid major expense

To secure the dam to the surrounding foundation, a grout curtain reaches to a depth of 200m beneath the dam and extends 100m into the rock on either side of the valley.

Concrete variety

2011) while discussing the post impounding problems of dams constructed in carbonate geology have described, "A number of seepage control measures such as grout curtain, dental treatment and impervious blanket were provided at the time of construction which did not prove sufficient".

Geological aspects of seepage problem and its management at Khanpur dam project, Pakistan

The first step was to isolate the shaft from groundwater by grouting the rock fissures around it and creating a grout curtain to reduce ingress, minimising potential contamination.

Deep trouble: bury nuclear waste a long way down and forget about it for decades proved an unwise policy at Dounreay. Now today's engineers have to clean up the mess

Drain holes in diversion tunnel and downstream of right saddle and strengthening of grout curtain of left abutment of main dam were also carried out.

POST IMPOUNDING PROBLEMS AND MANAGEMENT MEASURES IN CARBONATE GEOLOGY AT KHANPUR DAM PROJECT, PAKISTAN

If Obama signs the bill, the corps would receive the $44 million to help extend a grout curtain as a temporary fix for the next several years as engineers design and construct a permanent fix to stop a leak through a damaged abutment next to the Hanson Dam.

Afghanistan : US House approves $44 million for Hanson Dam repairs to help prevent flooding

If you are tunnelling and drilling holes for grouting then the quality of the grout curtain and the safety in the tunnel is depending on the pattern of the holes.

REFLEX INSTRUMENT - the home of borehole surveying

Geostudio analysis as well as field data has indicated that previous grout work at left and right abutments has failed to produce the required results and seepage which is being measured at the downstream toe of the dam is through the abutments instead of through the body or foundations of the dam and recommends that by extending the grout curtain up to a depth of 140' in case of left abutment and to a depth of 160' in case of right abutment, the quantities of seepage can significantly be reduced.

EFFECTIVENESS OF UPSTREAM BLANKET AND GROUTING IN CONTROL OF SEEPAGE AT KHANPUR DAM PROJECT

The solution was to design and construct a circular grout curtain around the footprint of the shafts that extended through the contact zone and bedrock to significantly reduce water inflow during construction.