Vertical cement mixing pile forming device and forming construction method

Abstract

The invention discloses a vertical cement mixing pile forming device and a forming construction method. The forming device comprises a vertical driving rod, a driving device, a vertical outer sleeve sleeving the outer side of the vertical driving rod and a mixing device installed on the lower portion of the vertical driving rod. The outer sleeve is connected with a cement paste pumping device. The mixing device comprises two horizontal driving rods and two groups of mixing impellers which are symmetrically arranged and perform vertical mixing synchronously. The forming construction method comprises a first step of construction preparation, a second step of cement mixing pile construction: a step 201 of drill-down mixing and spouting; a step 202 of lifting mixing and spouting; and a step 203 of pile body forming. The vertical cement mixing pile forming device is reasonable in design, simple and convenient to construct and good in using effect; in the cement mixing pile forming process, the vertical cement mixing pile forming device is favorable for drill-down mixing feeding of a vertical cement mixing pile device, the section of a pile body of a formed cement mixing pile is rectangular, the construction is simple and convenient, and the single cement mixing pile formed by construction has higher bearing capacity.

Description

technical field [0001] The invention belongs to the technical field of pile foundation construction, and in particular relates to a vertical cement mixing pile forming equipment and a forming construction method. Background technique [0002] In order to prevent accidents such as building instability caused by subsidence and cracking of the foundation after the construction is completed, if the foundation is not strong enough, the soft foundation needs to be treated before construction to make the settlement strong enough to improve the consolidation of the soft foundation And stability to design requirements, this process is called soft ground treatment, also known as soft ground treatment. As a common soft ground treatment measure, cement mixing pile is particularly important. Cement mixing pile is an effective form of soft foundation treatment. It uses cement as the main agent of the curing agent, and uses the mixing pile machine to spray cement into the soil and fully m...

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Problems solved by technology

In actual construction, the traditional cement mixing pile molding equipment mainly has the following disadvantages: First, the pile body section of the formed cement mixing pile is cylindrical. The bearing capacity of the pile is small; second, because the mixing blades of the traditional cement mixing pile forming equipment rotate horizontally, it is easy to produce uneven mixing of soil and cement slurry during mixing, which affects the quality of the pile; third, because the traditional cement mixing pile The mixing blades of the forming equipment rotate horizontally. During the mixing process, it is easy to produce different cement content on the cement mixing pile at different depths, which will cause uneven cement density layering on the pile body after the cement mixing pile is piled.

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