Machinery and equipment base and bottom grouting grouting problems should be paid attention to

Machinery and equipment foundation grouting materials plate bottom grouting secondary grouting material ( 1) Machinery and equipment base and bottom grouting grout should choose when the temperature is relatively low, with 5 ~ 30 ℃ advisable. ( 2) Machinery and equipment base plate and bottom grouting grouting material appropriate choice when the air temperature is relatively dry. During the rainy season, or a few days after the rain, should suspend grouting construction, because the pavement base of machinery and equipment and the bottom of the plate grouting materials often have a lot of water, although perfusion part of water can be expelled from time to tome, but it is impossible to completely discharge water, which influence the grouting effect. ( 3) When some hole grouting is not free, when slurry is difficult to insert, can use first to hole injection pump a small amount of water or jet air, to form small cavity and road. the parts throughout, so that the initial distribution of the grout. ( 4) Should control grouting pressure, when not to consider plate lifting, grouting pressure not to exceed 2 mpa is advisable. When observed grouting pressure gauge on the pump pressure and transcend control value, should stop pumping, avoid grouting material formed the case number plate body disturbance; At the same time, high pressure forming grouting clogging pull up cuts. ( 5) Serous when observed from a hole into another hole or slurry smoke and no longer stretches along the seam and shall be deemed to be note full; When grouting grout out from adjacent holes, and valves should be closed on the adjacent hole grouting embolism ( Or with a cork plug orifice) And static pressure for a period of time to avoid the pressure loss, to ensure the space filling compact. ( 6) Must be before the final set in mortar after grouting, timely elimination of joints and cracks in the residue, avoid pushing rupture induced plates, and before the open traffic, using the appropriate caulking information from irrigation seam, should be timely to remove residues in the pavement of mortar at the same time, avoid a road pollution. ( 7) Of grouting hole, can use the label is not lower than the original strength of concrete with fine stones to fill road planning, drilling grouting should be again from the beginning. ( 8) Machine base and the bottom of the plate grouting material, wrong bedplate grouting can neither make subsidence uplifting to level or in situ, also can't solve because cracks happened to drop in concrete pavement plate using the quality and performance problems. Therefore, machinery and equipment base plate and bottom grouting material grouting, the local repair and finish coat three levers and will become a kind of more effective cementing material construction maintenance skills. ( 9) Grouting concrete during construction of the original record, record sheet should be able to reflect the number of azimuth and cloth hole grouting hole every board, each grouting hole grouting pressure and grouting amount, slurry situation description, and so on. Construction records should include the grouting at the same time plate grouting material inspection standard of pavement situation and situation of disease and the grouting material ratio and primary skill index data. ( 10) To ensure that the old cement concrete road surface machinery and equipment base plate and bottom grouting material grouting construction quality, organization construction personnel should be relatively stable construction professional team.