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Method for construction of deep layer rotating spraying mixture pile with diffusion preventing plate

A construction method and a technology of mixing piles, which are applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of surrounding soil disturbance, uneven cement slurry content in pile bodies, and construction difficulties, and achieve simple and reliable construction methods. Ease of processing and the effect of improving strength

Inactive Publication Date: 2008-02-06
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art. The present invention provides a construction method of a deep rotary jet mixing pile with a diffusion prevention plate, which can effectively solve the disturbance of the surrounding soil during the deep rotary jet mixing process. Uneven content of cement slurry on the pile body and difficulties in construction on foundations with obstacles

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  • Method for construction of deep layer rotating spraying mixture pile with diffusion preventing plate

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Embodiment Construction

[0014] Embodiments are provided below in conjunction with the present invention. This embodiment adopts a construction method of a deep rotary spraying mixing pile with a diffusion prevention plate and two grouting ports:

[0015] The test site is the construction of mixing piles in a roadbed reinforcement project of an expressway. The foundation of this area is mostly weak soil layer, and the upper soil layer is mostly composed of miscellaneous fill, plain fill, and muddy fill. This part of the soil has a loose structure, high natural water content, high compressibility, low shear strength, and physical state. Most of them are soft plastic to flow plastic, so the engineering performance is extremely poor. Below 7 meters, it is dominated by brown-yellow loam, with a water content of about 42%. According to the nature of the soil engineering in this area, it is determined to use cement-soil mixing piles to reinforce the subgrade here. The design pile length is 13 meters, the d...

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Abstract

The invention relates to a deep layer rotating spaying stirring pile with diffusion preventing board construction method in building engineering technique field. It includes the following steps: flattening field; fixing stirring end; fixing stirring head at machine core pipe; hanging the stirring machine to given pile position; drill pipe is clockwise stirring sinking and spaying slurry; start up stirring machine; sinking spaying stirring until reach pile lower 10cm and change to stir; the drill pipe is counter-clockwise rotating and raising stirring end; stopping slurry spaying; raising stirring head to reach design elevation. The invention has the advantages of simple and reliable, economic and practical, and convenient construction. It can increase stirring pile strength and reduce the influence on surrounding environment.

Description

technical field [0001] The invention relates to a construction method in the technical field of construction engineering, in particular to a construction method of a deep rotary jet mixing pile with a diffusion prevention plate. Background technique [0002] At present, there are many methods for strengthening soft soil foundations. Deep mixing piles and high-pressure rotary grouting piles are two methods that are widely used in soft soil foundation reinforcement. The deep mixing pile is made by stirring and injecting the chemical curing agent (cement or lime powder or slurry) and the soft clay on site through the stirring of the rotating blade, while the high-pressure rotary grouting pile uses high-pressure water flow or mud flow to chop the soft clay on site and make it It is mixed with an injected chemical curing agent. The construction machinery of the deep mixing pile is relatively large in size and inconvenient for construction. The construction equipment of high-pre...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/46
Inventor 沈水龙唐翠萍洪振舜蔡正银
Owner SHANGHAI JIAOTONG UNIV