Section bar inserting and high-pressure rotary jetting method for forming pile with expanded plates in sink area

A technology of high-pressure rotary spraying and molding methods, which is applied in sheet pile walls, buildings, and foundation structure engineering, etc., can solve problems such as unfavorable economic development in mining areas, inconvenience in production and life, and cumbersome examination and approval work, and achieve economic benefits in mining areas and wide practicability , The effect of simple construction

Inactive Publication Date: 2006-10-11
CHINA UNIV OF MINING & TECH
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Problems solved by technology

This method occupies a lot of cultivated land, requires a large investment, and the examination and approval work is cumbersome, and it causes great inconvenience to the production and life of nearby rural residents, which is not conducive to the economic development of the mining area.

Method used

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  • Section bar inserting and high-pressure rotary jetting method for forming pile with expanded plates in sink area
  • Section bar inserting and high-pressure rotary jetting method for forming pile with expanded plates in sink area

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Embodiment Construction

[0009] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0010] The molding method of the present invention for inserting ribs and high-pressure rotary jet grouting expansion piles in the subsidence area firstly drills multiple drill pipes 1 to a predetermined depth, and puts the pile body 4 formed by rotary jet grouting in the subsidence area on the pile body 4 formed by rotary jet grouting According to the soil quality, pressurize or change the injection time to increase the amount of cement slurry ejected by the drill pipe nozzle 2 per unit time to form a trapezoidal expansion plate 5, and a trapezoidal expansion plate 5 can be set according to the requirements of the required expansion pile bearing capacity. or more ( figure 1 shown), and finally insert H-shaped steel 3 or tensile material into the pile body 4, thereby increasing its vertical bearing capacity and horizontal bearing capacity, and can also be a...

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Abstract

The invention discloses a method for molding the high-pressure rotational spray expansion post in sink area. Wherein, forming a trapezium expansion disc on the post formed by rotational spraying slurry injection according to the segment pressure or the injection time; inserting section steel as anti-drawing material into the post. The invention can increase the upright bearing ability and improve the horizontal bearing ability; especially at the interface of soil, it can eliminate the effect of horizontal displacement, with lower cost, short time, easy construction, lower soil occupied and saved land resource. The invention can be used to strengthen the foundation in large distortion condition, to reduce cost and improve economic benefit, with wider application.

Description

1. Technical field [0001] The invention relates to a method for forming a high-pressure rotary grouting expansion pile with reinforcement inserted in a subsidence area, and is especially suitable for reinforcing existing bridges or buildings in the subsidence area, and is also suitable for foundation reinforcement under conventional soft soil area conditions. 2. Background technology [0002] Coal is the foundation of industrial power. About 75% of the country's industrial fuels and 65% of chemical raw materials rely on coal; coal has become one of China's important export commodities. Due to the massive mining of coal resources, it has a certain impact on the environment, especially the damage to land resources, ground buildings and public facilities, and groundwater systems. Whether it is the mining technology to reduce surface subsidence, including room-and-pillar mining, partial mining, filling method mining, layered gap mining, etc., or ordinary mining methods, it will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/36E02D5/48
Inventor 于广云葛新辉
Owner CHINA UNIV OF MINING & TECH
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