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Construction method for soil-cement mixing piles

A technology of cement-soil mixing piles and construction methods, which is applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of cement piles such as inconvenient construction, difficult to form columns, and easy to disperse, and achieve convenient soil mixing columns, stability The effect of enhancing and reducing the amount of settlement

Inactive Publication Date: 2015-12-02
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in some permafrost layers, mud swamps are formed during construction. When pouring cement-soil piles, it is easy to disperse into the soil and it is difficult to form columns, which causes great inconvenience to the construction of cement piles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] Construction method in the present embodiment comprises the following steps:

[0029] (1) Leveling the site;

[0030] (2) Positioning and setting out, the length of the pile required for testing;

[0031] (3) Add soil stabilizer to the soil on site, and add water to make soil slurry;

[0032] (4) Put the mixing pile machine into the designated pile position and start it to stir and sink. When it reaches the designated position, turn on the mortar pump to spray out the soil slurry prepared in step (3) and stir it up. After completion , carry out the stirring and spraying soil slurry at the next pile position;

[0033] (5) After the injected soil slurry forms a column, prepare cement slurry;

[0034] (6) Put the mixing pile driver into the soil mixing column, stir and sink the soil mixing column, and turn on the mortar pump after reaching the designated position, inject cement and soil slurry, and stir and lift;

[0035] (7) The mixing pile driver goes up and down rep...

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Abstract

The invention discloses a construction method for soil-cement mixing piles. The method comprises the following steps: (1) leveling a site; (2) carrying out positioning and lofting, and testing the length of a needed pile; (3) preparing soil slurry; (4) pouring soil mixing columns; (5) after the poured soil slurry forms the columns, preparing soil-cement slurry; (6) putting a pile mixing machine at the soil mixing column to mix and sink the soil mixing column; after the soil mixing column reaches a designated spot, starting an ash slurry pump, pouring the soil-cement slurry, and carrying out mixing and raising; (7) repeatedly raising and dropping the pile mixing machine to mix and spray the soil-cement slurry for two times, and carrying out the construction of the soil-cement mixing pile at the next soil mixing column. According to the method, a soil pile is poured firstly, and a soil-cement pile is poured into the soil pile, so that the construction of the mixing piles in the soft soil layer or a quicksand soil layer is realized. Particularly, aiming at muddy water marsh generated in the frozen soil construction, the bearing capacity and the slope stability of a foundation can be quickly improved well, and the settling volume is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method of a cement-soil mixing pile. Background technique [0002] Cement-soil mixing piles have been widely used in geotechnical engineering in construction, water conservancy, transportation and other industries, and have achieved ideal results in foundation treatment, water interception curtains and foundation pit support projects. This construction technology is a commonly used method for soft soil foundation reinforcement, and it has a significant effect on improving the bearing capacity of soft soil foundation and slope stability, and reducing settlement. [0003] Commonly used foundation treatment methods include deep hole deep dynamic compaction method, replacement cushion method, dynamic compaction method, sand and gravel pile method, vibratory impact method, cement-soil mixing method, high-pressure jet grouting method, pre-loading method, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/46
Inventor 苏春生
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG
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