| 摘要 |
A method of preparing and administering grout (G) for injection into multiple or large diameter boreholes in rock or soil, whereby a batch of grout having a predetermined composition is prepared by controlled addition of predetermined quantities of ingredients, such as water, cement and additives, from a respective supply (2-5) to two or more mixers (6A-6N) for mixing therein, a prepared grout quantity is detected by positive weighing of the grout prepared in a mixer and prepared grout is then fed to an agitator (7) from which grout is pumped on demand to injection equipment (8) for injection into boreholes. The method includes a continuous detection of the output quantity of grout from the agitator and thereby of the grout supplied to the injection equipment by negative weighing, i.e. weighing of remaining grout in the agitator to thereby enable calculation of a mass flow rate, e.g. the amount of grout withdrawn from the agitator in a given time and thereby of the required total mixer capacity for a specific batch. An apparatus for performing the method is also provided. |
