Grouting. Remove oil, rust inhibitors, residual drilling fluids and similar foreign materials from holding tanks/hoppers, stirring devices, pumps, lines, tremie pipes and any other equipment in contact with grout before use. Inject grout at the lowest point of drill holes through tremies, e.g., grout tubes, casings, hollow-stem augers or drill rods, in one continuous operation. Fill drill holes progressively from ends of holes to excavation faces and withdraw tremies at a slow even rate as holes are filled to prevent voids in grout. Extend tremies into grout at least 5 ft at all times except when grout is initially placed in holes. Provide grout free of segregation, intrusions, contamination, structural damage or inadequate consolidation (honeycombing). Cold joints in grout are not allowed except for test nails. Remove any temporary casings as grout is placed and record grout volume for each drill hole.
Grouting. A. Grouting of ground anchors shall comply with PTI DC35.1.
Grouting. 1. Grouting of the annular space around the rock dowel by tremie grouting methods (using sufficient pressure to overcome the hydrostatic head) after the bar is in- place, using a portable grout pump.
Grouting. Prior to positioning of structural columns/girders/trusses over the concrete pedestals/ columns/brackets, all laitance and loose material shall be removed by wire brushing and chipping. The bearing concrete surfaces shall be sufficiently leveled, hacked with flat chisels to make them rough, cleaned (using compressed air) and made thoroughly wet. All pockets for anchor bolts shall also be similarly cleaned any any excess water removed. Thereafter, the structural member shall be erected, aligned and plumbed maintaining the base plates/shoe plates at the levels shown in the drawings, with necessary shims/pack plates/wedges.
Grouting. Cementitious grouting material shall be injected starting from the furthest point of the drilled hole so that the dowel is completely encased in grout. Grout shall not be used after a period equivalent to its initial setting time. Where cement grout is used, a set of six cubes of cement grout shall be taken when each series of rock dowels is in progress. Sampling, preparation, curing and testing shall be in accordance with BS EN 196. Half the cubes shall be tested at 1 day and the remainder at 28 days. The average compressive strength determined from any group of cubes shall exceed the specified characteristic strength given in Table 2 of EN 197-1:2000 or equivalent Indian Standard. Grouting operation is defined as follows: - contact or cavity grouting, at pressures up to 300 kPa, to fill voids between final concrete lining and primary sprayed concrete lining, or between the primary lining and rock - consolidation grouting or strata grouting, at pressures up to 6 MPa, of the rock surrounding the excavated space, which shall commence after completion of contact grouting, where applied - consolidation grouting or strata grouting in the heading zone, at pressures up to 6 MPa, in zones of sheared and disturbed material or of high-water inflow - final grouting of temporary drainage holes The Contractor shall prepare a detailed grouting Specification to suit best the actual conditions encountered. This grouting specification shall be submitted to the Employer’s Representative for approval unless otherwise agreed or directed by the Employer’s Representative. The Tunnel Designer’s Representative shall specify the maximum pressures to be used for grout injection at each location. The pressures specified are subject to approval by the Employer’s Representative. Records of all details of grouting works such as location, inclination, diameter of boreholes, drilling time, equipment used, results of water pressure tests, mix, quantity, pressure of grouting, development and special events during grouting operation etc. shall be kept by the Contractor, countersigned on site by the Employer’s supervising personnel and submitted to the Employer’s Representative. Where necessary due to the nature of the ground conditions or where adverse water conditions are anticipated, the requirements for the use of special grouts shall be stated in the Contract. Special grouts supplied by proprietary manufacturers may be used subject to agreement with the Employer’s Representative. Preco...
Grouting. A. Grouting of micropiles shall comply with FHWA-NHI-05-039
Grouting. X. Xxxxxxxx of ground anchors shall comply with PTI DC35.1.
Grouting. A. Mix grout in accordance with the approved manufacturer’s instructions to a consistency which will permit placement. Place grout so as to ensure complete bearing and elimination of air pockets.
Grouting. Start at the lowest, middle hole of each section to be grouted, grout holes above to remain open, and proceed upward progressively and, if possible, simultaneously on both sides of the casing or tunnel until all voids are completely filled. Provide threaded grout holes (at a minimum) as follows • Three (3) holes spaced equally across the circumference of the pipe with one (1) hole located at the top of the casing pipe. • Grout hole patterns to be repeated every five (5) feet along the pipe. Provide grout holes in addition to those specified where directed by the Engineer to insure filling of all voids. At any given location grouting pressures to not exceed one (1) psi for each foot of overburden in rock and one-half (1/2) psi for each foot of overburden in earth.
Grouting. A. Grout space between casing pipes and outside of drilled hole in accordance with AWWA A100.
