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Construction method of all-casing rotary jet grouting pile

A construction method and technology of spraying piles, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve problems such as waste, and achieve the effects of easy installation and operation, reduced penetration, and reliable pile formation.

Inactive Publication Date: 2016-12-14
FUJIAN YONGQIANG SOIL
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Problems solved by technology

According to the type of grouting pipe, high-pressure jet grouting can be divided into three methods: single pipe, double pipe and triple pipe; single pipe simply sprays cement slurry; double pipe wraps a layer of high-pressure air outside the cement slurry jet and sprays at the same time The soil structure is destroyed, and replacement and filling are completed at the same time; while the triple pipe uses high-pressure water wrapped in high-pressure air to destroy the soil structure, and then replaces and fills it with cement grout; however, when piling grouting, the concrete grout permeates around , causing waste

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  • Construction method of all-casing rotary jet grouting pile

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Embodiment Construction

[0016] The construction method of a full casing rotary grouting pile of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] As shown in the figure, a construction method of a full casing rotary grouting pile is characterized in that the construction steps are as follows:

[0018] Step 1: Taking the center of the hole as the center of the circle, insert the prefabricated steel casing with a diameter slightly larger than the designed pile body into the ground until it is 500mm below the design elevation;

[0019] The second step: drilling rig positioning. Move the rotary grouting pile machine to the designated pile position (casing center), align the drill bit to the center of the hole position, and level the drilling machine at the same time, place it stably and horizontally, and the verticality deviation of the drill pipe is not more than 1% to 1.5%. After being in place, first conduct a low-pr...

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Abstract

The invention relates to a construction method of an all-casing rotary jet grouting pile. The construction method of the all-casing rotary jet grouting pile is characterized in that rotary jet grouting pile operation is performed by the steps of determining the center of hole position, positioning a drilling machine, preparing cement paste, starting a rotary jet grouting drill and the like; mounting and operation are simple and easy; waste caused by the fact that cement grout permeates towards the soil layer all around during grouting can be reduced; and a casing pipe is added, so that the pile body has higher integrality and pile formation is reliable.

Description

technical field [0001] The invention relates to the field of civil engineering, and relates to a construction method of a special cement-soil pile, in particular to a construction method of a full casing rotary grouting pile. Background technique [0002] The high-pressure rotary grouting pile construction technology was first proposed in Japan in the 1970s. It was developed on the basis of static pressure grouting and the introduction of hydraulic coal mining technology. At the same time, cement slurry or composite slurry is poured into it to form a condensate, so as to achieve the purpose of strengthening the foundation and preventing seepage and water. [0003] At present, the high-pressure jet grouting method has been widely used in the treatment of foundations in my country, and corresponding construction design specifications have been formulated; More and more applications; in some big cities, with the rise of subway construction and high-rise buildings, many deep fou...

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Application Information

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IPC IPC(8): E02D5/46
CPCE02D5/46
Inventor 郑添寿邱维衍张强孔秋平许万强江景云钟志明陈万琴李丽琴
Owner FUJIAN YONGQIANG SOIL
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