Field measurement study on ground perforation grouting for ultradeep soil

According to the practice of grouting engineering of BaoDian mineshaft lining fracture treatment, the construction technology of bottom-up perforation grouting suitable for ultradeep (not less than 100 meters) soil ground grouting is described in detail, the most commonly-encountered engineering accident is pointed out and the accident prevention method is proposed. The grouting pressure is studied by field measurement; then“the hydraulic fracturing theory”and “the energy analysis principle for fracturing” are used to analyze gymnostomous grouting and the flux control method is applied for fracturing grouting and range. At last, diffusing way of the single bore grouting are deduced by drilling-core and some engineering phenomenon. The data and conclusion presented in this paper are valuable as a reference for design and construction of similar grouting projects.