Grouting construction technology and grouting machine
2021-01-01
Grouting machine, that is, grouting pump, plays an important role in grouting construction. Grouting technology has achieved great development in recent years. Grouting has become an engineering discipline. It has become a comprehensive discipline of cross disciplines such as civil engineering, rock, chemical industry, machinery and geology
It is mainly to strengthen the formation and plug the leakage, improve the bearing capacity and stability of the formation, and improve the air tightness of the formation in the underground gas storage. It mainly includes fault fracture zone reinforcement, grouting and water plugging, etc. After more than 100 years of development, grouting has developed from the earliest single liquid grouting to multi-liquid grouting, from clay to chemical grouting, and the equipment has developed from a single grouting equipment to a complete set of special equipment such as survey, pulping, grouting, recording, inspection and analysis.
Under a certain pressure, grouting will press the curable liquid into the gap between the stratum and structure to fill and solidify, so as to improve the physical properties of the stratum and structure, and achieve the purpose of reinforcement, water stop and leakage prevention. In the process of slurry injection, the slurry generally penetrates first. When the channel is blocked, it is difficult for the slurry to penetrate, that is, the surrounding strata are compacted. When the pressure continues to rise, splitting occurs in the soil, and the slurry further diffuses along the crack. The penetration, compaction and splitting affect and complement each other, It can improve the integrity and strength of soil and reduce the permeability coefficient and water content of formation.
Infiltration grouting: fill the gap or crack, discharge the free water and gas in the hole, and do not change the soil structure. The end point grouting is spherical diffusion, and the flower tube segmented grouting is cylindrical diffusion.
Splitting grouting: overcome the initial stress of the stratum and the tensile strength of the rock mass through pressure, so that new fractures appear in the stratum, and the fractures are filled with slurry.
Compaction grouting: grout bubbles are formed around the grouting points to compact the soil.
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