Nail type cement soil stirring pile operation method

A technology of cement-soil mixing pile and operation method, which is applied in sheet pile wall, building, foundation structure engineering and other directions, can solve the problem that the strength of hard shell soil itself cannot be fully utilized, and affects the large-scale popularization and application of cement-soil mixing pile. , the difficulty of coordinating the sharing of piles and soil, etc., to avoid uneven settlement, easy to popularize, and save project cost.

Active Publication Date: 2005-06-29
南京路鼎搅拌桩特种技术有限公司
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Problems solved by technology

[0005] (1) It is difficult to coordinate the pile-soil sharing effect, and it is necessary to set a cushion layer or a geotextile reinforcement layer on the top of the pile;
[0006] (2) The pile spacing is small, and the cost is high, whic

Method used

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  • Nail type cement soil stirring pile operation method
  • Nail type cement soil stirring pile operation method
  • Nail type cement soil stirring pile operation method

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Embodiment Construction

[0028] The embodiment is a certain construction section, 8 wet-sprayed piles for on-site construction test, the pile length is 10 meters, the ash mixing ratio is 15%, the pile diameter is 500 mm, the pile diameter of the enlarged part of the upper part is 900 mm, and the variable cross-section positions are respectively located at the upper part of the pile 3 meters and 5 meters away.

[0029] (1) Leveling the site;

[0030] (2) The pile positions of the test piles are arranged in a square shape;

[0031] (3) Positioning of the mixer: the crane suspends the mixer to the designated pile position and aligns it;

[0032] (4) Stirring and sinking: Start the mixer, make the mixer cut the soil down along the guide frame, the pile is 500mm long, turn on the slurry pump to spray cement slurry to the soil, the blades rotate forward and reverse at the same time to stir the cement soil, and the mixer continues to sink until 10 meters depth;

[0033] (5) Lifting and mixing: the mixer i...

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Abstract

The operation method of the nail-shaped cement-soil mixing pile is a foundation treatment method, which is suitable for the treatment of soft soil foundation. The construction operation steps are as follows: a. Level the site, and the pile position of the nail-shaped cement-soil mixing pile shall be arranged in plum or square shape; b. Positioning of the mixer: The crane suspends the mixer to the designated pile position and aligns it; c. Mixing and sinking: Start the mixer, make the mixer cut down the soil along the guide frame, and at the same time start the slurry pump to spray cement slurry to the soil, and the mixing blade rotates Stir the cement and soil, and the mixer continues to sink until the design depth; d. Lifting and stirring: the mixer is lifted while continuing to stir the cement and soil to 50cm above the surface or the design elevation; repeat the above steps c and d to complete the construction of the lower pile body; e, Construction of the expansion head: When the mixer is lifted to the surface, first turn off the slurry pump, turn on the expansion switch of the stirring blade, so that the stirring blade is extended to the design length, and then repeat the above steps c and d to complete the upper expansion head part of the construction.

Description

technical field [0001] The invention relates to a ground treatment method, which is suitable for the treatment of soft ground and belongs to the technical field of civil engineering. Background technique [0002] The cement-soil mixing pile was first successfully developed in Sweden. In China, in 1977, the General Institute of Construction Research of the Ministry of Metallurgy and the Water Transport Planning and Design Institute of the Ministry of Communications carried out indoor experiments and mechanical development. In 1980, it succeeded for the first time in the soft soil foundation reinforcement project. Since then, it has been popularized in soft soil foundation reinforcement projects across the country, especially in soft soil foundation treatment in road engineering. [0003] Soft soil foundation treatment in road engineering is a key link to ensure the quality of the project, and it occupies a large proportion of the total project pr...

Claims

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Application Information

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IPC IPC(8): E02D5/34
Inventor 刘松玉宫能和冯锦林席培胜
Owner 南京路鼎搅拌桩特种技术有限公司
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