Grouting technology and grouting device for anti-suckback and anti-sedimentation in deep and thick water-saturated sand layer
A grouting device and anti-suckback technology, applied in infrastructure engineering, construction, etc., can solve the problems of shortening of the effective layer of grouting holes and grouting pipes, impossibility of secondary grouting, poor grouting effect, etc. , to achieve good curing effect, controllable grouting process and convenient operation
Active Publication Date: 2017-06-09
中煤科工生态环境科技有限公司
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Problems solved by technology
In the technology of using grouting for sand consolidation, when grouting from ground boreholes to deep and thick water-saturated sand layers, conventional grouting devices and processes are used, and the grout will often flow back into the grouting pipe under high hydraulic pressure. , and bring in mud and sand to block the grouting pipe, resulting in the impossibility of secondary grouting
In addition, due to the segregation of grout, thicker grout is easy to accumulate at the bottom of the hole or the bottom of the grouting pipe, which shortens the effective layer of the grouting hole and the grouting pipe, and the grouting effect is not good
Method used
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[0030] see figure 1 , shows the anti-suckback and anti-sedimentation grouting device of the present invention in deep and thick water-saturated sand layers.
[0031] The grouting device includes a grouting outer pipe 11 and a grouting core pipe 12, one end of the grouting outer pipe 11 is closed, and the other end is open and sleeved on the grouting core pipe 12, wherein the grouting The middle part of the core pipe 12 is inserted into the grouting outer pipe 11 through a threaded sleeve 13. Optionally, the other end of the grouting core pipe 12 is sleeved with another threaded sleeve 13 to provide multiple The grouting core pipes 12 are sequentially socketed to adapt to different lengths and ranges.
[0032] Wherein, the periphery of the grouting outer pipe 11 is dug with multiple groups of grout holes 14, two or four groups of grout holes 14 may be arranged in the same radial direction, and multiple groups of grout holes in the axial direction 14 can be equally spaced or u...
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A grouting process and a grouting device for anti-suckback and anti-sedimentation in deep and thick water-saturated sand layers, the grouting device includes a grouting outer pipe and a grouting core pipe, and the grouting core pipe is inserted through a threaded sleeve The grouting outer pipe has multiple groups of grouting holes dug on the periphery of the grouting outer pipe, and a plurality of rubber sleeves covering the grouting holes are arranged on the grouting outer pipe. The process of the present invention is simple and the operation is convenient. Ground boreholes will be used to accurately grout deep, saturated, thawed sand layers, allowing for selectable grouting pressures, and the grout will not be sucked back into the grouting pipe after grouting is stopped. In addition, it can also effectively prevent grouting at the bottom of the grouting pipe and block the effective grouting layer or the grouting hole on the grouting pipe, and clean the grouting pipe after the grouting is completed, so that the grouting hole and the grouting hole can be reused. The grouting pipe realizes intermittent multiple grouting to the formation.
Description
technical field [0001] The invention relates to the technical field of water and sand inrush control in coal mine shafts, in particular to a grouting process and a grouting device for preventing suction and sedimentation in deep and thick water-saturated sand layers. Background technique [0002] When coal mine shafts (vertical shafts or inclined shafts) pass through deep and thick water-saturated sand layers, in order to improve the efficiency of shaft excavation and prevent water and sand from pouring into the shaft excavation face, freezing method is one of the more commonly used stratum treatment methods. Use the freezing method to freeze the water-saturated sand layer within a certain range of the formation that the wellbore passes through, solidify the flowable water and loose sand into a stone-like body, and then carry out the wellbore excavation operation in this kind of stone body, so that the wellbore The excavation operation face will maintain a relatively stable ...
Claims
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IPC IPC(8): E02D15/02
Inventor 李建文徐拴海曹祖宝李雄伟袁克阔王新锋王祥任邵红旗王晓东赵冬
Owner 中煤科工生态环境科技有限公司