Large-diameter quickly-accomplished homogeneous cement-soil pile high pressure jet grouting micropore spouting nozzle group stirrer

Abstract

The invention discloses a large-diameter quickly-accomplished homogeneous cement-soil pile high pressure jet grouting micropore spouting nozzle group stirrer which comprises a grouting main pipe. The middle and the lower portion of the grouting main pipe are provided with an upper-layer transverse flat bayonet and a lower-layer transverse flat bayonet respectively, and the horizontal projections of the upper-layer transverse flat bayonet and the lower-layer transverse flat bayonet are in a cross shape. Inclined branch pipes are arranged between the upper portion of the grouting main pipe and the upper-layer transverse flat bayonet and between the upper portion of the grouting main pipe and the lower-layer transverse flat bayonet respectively. The inclined branch pipes and transverse branch pipes arranged on the back face of the upper-layer transverse flat bayonet and the back face of the lower-layer transverse flat bayonet are connected. The grouting main pipe, the inclined branch pipes and the transverse branch pipes are interconnected. The large-diameter quickly-accomplished homogeneous cement-soil pile high pressure jet grouting micropore spouting nozzle group stirrer has the technical effects that by the adoption of the stirrer for construction, a drill rod moves back and forth one time instead of moving back and forth three times in design requirements to manufacture a cement-soil pile, quality supervision and management work difficulty of on-site management staff is lowered, the construction progress is greatly accelerated, the working efficiency is improved, the pile forming quality is ensured, the operation is rapid and convenient, and the ideal target for large-diameter quickly-accomplished homogeneous cement-soil heavy curtain piles is achieved.

Description

Technical field [0001] The invention relates to a deep-layer uniform mixing equipment for cement-soil piles, in particular to a large-diameter quick-form homogeneous cement-soil pile high-pressure rotary jet microporous spray nozzle group mixer. The cement-soil pile produced by the invention has low cost, and can be widely used in soft soil foundation treatment, embankment of hydraulic structures, anti-seepage of reservoir dam, anti-seepage of coal mine port, underground public pipe gallery of municipal engineering, underground power Fields such as pipe gallery, underground heating pipe gallery, underground communication pipe gallery, underground water supply and drainage pipe gallery, ultra-deep foundation pit support and water-stop curtain. Background technique [0002] According to the "Technical Specification for Building Pile Foundations", piles with a diameter greater than 800mm are called large-diameter piles. [0003] At present, two-axis or single-axis construction machin...

AI Technical Summary

Problems solved by technology

However, in engineering practice, due to the influence of factors such as the positioning error of the two-axis cement-soil mixer, the stratum, and construction vibration, there will often be a split between the two columnar bodies below -5m underground. With the increase in the length of the underground pile , the gap between the two columns below -10m underground will be larger. Whether it is a single-axis or a double-axis cement-soil mixer construction machine for cement-soil mixing pile construction, in sand layers, especially in high-sensitivity rich water thickness In the sand layer, slits can be seen everywhere, resulting in the reduction of the anti-seepage function of the water-stop curtain, resulting in the failure of the water-stop water curtain of the foundation pit, water gushing and sand foundry and other accidents, endangering the safety of the deep foundation pit, and in severe cases, the collapse of the deep foundation pit , not only interrupt the construction of deep foundation pit engineering, but also affect the safety of buildings around the deep foundation pit

Whether it is uniaxial or biaxial existing mechanical construction, its diameter is less than 700mm. Under the premise of ensuring the proportion of cement slurry mixed, if the cement slurry and soil are to be fully and evenly mixed, according to the construction process, multiple times are used. It can be realized by repeating up and down stirring, and it is impossible to go back and forth without repeated stirring multiple times, that is, without increasing the number of repeated up and down stirring, it can also ensure the rapid production of high-quality and efficient cement-soil curtain piles, and the production of cement-soil curtain piles with a diameter greater than 800mm Such construction machinery has not yet been

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