Reducing swing-injected agitating pile

Abstract

The invention relates to a reducing swing-injected agitating pile. Stirred cement paste is pressed into a cement paste tube through a slurry pump. The cement paste enters a faucet through a cement paste pipe connector, then enters a grouting steel tube and is sprayed out through a high-pressure slurry sprayer, and a soil body is cut at high pressure. While the soil body is cut through high-pressure cement paste, reducing stirring blades arranged on an outer drill pipe and an inner drill pipe can synchronously achieve stirring of the soil body. While the soil body is cut through a high-pressure grouting mode and the stirring blades of the inner and outer drill pipes rotate to stir the soil body, under the action of a lifting system, the whole high-pressure grouting and stirring system carries out grouting, stirring and sinking at the same time or stirring and uplifting at the same time according to design requirements. By means of a series of motions, the cement cylindrical agitating pile with a certain diameter can be obtained. On the basis that the advantages that a construction machine is simple and speed is high in a deep layer stirring method are inherited, the comprehensive advantages that a high-pressure swing-injection method is large in guniting pressure, wide in applicable stratum range and large in three-axis agitating pile power are combined, and the agitating pile has the characteristic of being wide in application range.

Description

technical field [0001] The invention relates to a variable-diameter rotary spraying mixing pile, which can be used for treating weak foundations by cement reinforcement. Background technique [0002] The cement reinforcement method has been popularized and used for many years in my country to deal with weak foundations, and it can make the most of the in-situ foundation soil. Through a large number of engineering practices, it has been proved that the cement reinforcement method is a widely used, economical and effective foundation treatment method. At present, the main construction methods that use the principle of cement reinforcement method to treat the foundation in our country are: deep mixing method, high-pressure rotary spraying method, and three-axis mixing method. [0003] The deep mixing method uses cement, lime and other materials as the curing agent, and uses a low-pressure slurry pump (generally less than 2Mpa) to pump the solidified slurry to the depth of the ...

AI Technical Summary

Problems solved by technology

In order to make the mixing more uniform, the slurry and the soil are fully turned and mixed by the spiral blade on the mixing shaft. During this process, the cement slurry and some displaced soil clods fall into the pile hole, resulting in uneven mixing at the bottom of the pile. poor pile strength

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