Double-tube dry-shotcrete cement soil pile-forming method

A pile-forming and soil-forming technology, which is applied in the direction of sheet pile walls, buildings, foundation structure engineering, etc., can solve the problems of difficult foundation treatment, uneven ash spraying, small treatment depth, etc., achieve large pile diameter and improve pile quality , The effect of increasing the pile depth

Active Publication Date: 2015-05-27
CHINA RAILWAY SCI & IND GRP RAIL TRANSPORTATION EQUIP LIMITED
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In the past engineering practice, the following problems often existed in the construction of soft soil foundation treated by powder spraying piles: poor uniformity, partial ash breaking, uneven ash spraying, and insufficient strength; it is suitable for soft and air-permeable foundation treatment, and dense and poor air-permeability. The foundation is difficult to handle; the processing depth is small, usually less than 18 meters; the pile diameter is small, usually less than 600 mm

Method used

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  • Double-tube dry-shotcrete cement soil pile-forming method
  • Double-tube dry-shotcrete cement soil pile-forming method
  • Double-tube dry-shotcrete cement soil pile-forming method

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so that the protection scope of the present invention can be defined more clearly.

[0025] In the construction process of the pile forming method of the present invention, the key component used in conjunction with the drilling rig construction is a double-tube dry jet mixing drilling tool (see figure 1 As shown), it is composed of a faucet 10, a drill pipe 20 and a drill bit 30, wherein the faucet 10 has a high-pressure gas input port 11, a low-pressure gas, and a low-pressure cement powder input port 12; the drill pipe 20 includes a gas pipe 21 and a core pipe 22; the drill bit 30 has a high-pressure gas outlet 31, a low-pressure gas, a low-pressure cement powder outlet 32 ​​and a stirring blade 33.

[0026] Among them, the high-pressure gas is inp...

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Abstract

The invention discloses a double-tube dry-shotcrete cement soil pile-forming method which comprises a first step of conducting ventilation premixing sinking, a second step of conveying and lifting dry powder curing agent, and a third step of conducting repeated mixing and forming a pile. A high-pressure draft is jetted into the soil through air tubes, and the high-pressure draft has the functions of soil cutting and cement soil stirring. Therefore, construction of a power-spraying pile with a large diameter and a large depth can be achieved, and the efficiency of construction and the quality of the formed piles can be improved.

Description

technical field [0001] The invention relates to a pile-forming method for composite foundation reinforcement, in particular to a double-pipe dry-spraying cement-soil pile-forming method in which high-pressure gas cutting and stirring low-pressure gas transports dry powder solidification materials. Background technique [0002] Powder-sprayed piles are also called reinforced soil piles. They use powdery cement (or lime) and other materials as curing agents. During the drilling process, special-made powder-spraying pile machines are used to spray the curing agent into the deep layer of the soft soil foundation. The in-situ soil and the curing agent are evenly mixed and a series of physical and chemical reactions occur, so that the soft soil is hardened into a composite foundation of powder-sprayed piles with overall interaction and joint action to bear the upper load. Due to the advantages of effectively reducing the total settlement, being able to withstand a large loading ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/46
Inventor 章军平胡学军朱雪峰卢宗光殷曼娇李声伟张辉吴平汤旭东郭兴
Owner CHINA RAILWAY SCI & IND GRP RAIL TRANSPORTATION EQUIP LIMITED
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