Rotary excavating drilling system and soil and underground water in-situ repair process adopting same

A groundwater and drill bit technology, applied in the field of stratum restoration, can solve the problems of uneven mixing of chemicals with soil and groundwater, small diffusion radius of chemicals, unsatisfactory restoration effect, etc., so as to shorten the restoration construction period, enhance the jet cutting ability, and improve the restoration efficiency. Effect

Pending Publication Date: 2020-02-07
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing soil and groundwater in-situ remediation technology mainly has the following deficiencies: First, for a large area of ​​contaminated sites, the existing remediation process requires a large number of boreholes to be drilled in the contaminated site due to the small size of a single borehole repair, resulting in Heavy drilling workload, long construction period and high cost
Second, when repairing weakly permeable formations, the diffusion radius of the repairing agent is small, and the mixing of the agent with the soil and groundwater is uneven, resulting in an unsatisfactory repairing effect

Method used

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  • Rotary excavating drilling system and soil and underground water in-situ repair process adopting same
  • Rotary excavating drilling system and soil and underground water in-situ repair process adopting same
  • Rotary excavating drilling system and soil and underground water in-situ repair process adopting same

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Embodiment Construction

[0041] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0042] Such as figure 1As shown, a rotary drilling system includes an inner pipe 5, an outer pipe 8, a jet nipple 12 and a drill bit 13. The inner pipe 5 is rotatably supported in the outer pipe 8, and the inner pipe 5 and the outer pipe 8 are respectively driven by corresponding power. head drive; one end of the outer pipe 8 drilled is socketed with a spray nipple 12, and the end of the jet nipple 12 away from the outer pipe 8 is connected to the drill bit 13; the jet nipple 12 includes a plurality of spray ports evenly opened in the radial direction, Inner tube 5 and outer tube 8 correspond to the injection ports and have coaxial water holes, the inner diameter of the water holes offered on the inner tube 5 is smal...

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Abstract

The invention discloses a rotary excavating drilling system and a soil and underground water in-situ repair process adopting the same. According to the rotary excavating drilling system, a rotary excavating and guide drilling integrated drilling machine is adopted to complete different angles of drilling and withdrawal rotary jet grouting operation. Through the repair process, adopted equipment issimple, and fewer accessory devices are adopted. The same rotary excavating drilling machine can implement the vertical jet injection process and the multi-branch well withdrawal jet grouting process, and the two processes can be selected according to the distribution difference of polluted spaces. The vertical jet injection process is selected to implement in-situ injection repair on scattered spot polluted sites. The multi-branch well withdrawal jet grouting process is selected to implement in-situ injection repair on large-area surface polluted sites. The spot-surface combined space stereoscopic repair effect can be achieved. Compared with the vertical injection process, the multi-branch well repair process has the advantages that single-pass long-distance and large-area repair can berealized, the repair efficiency can be improved, the repair period can be shortened, and the repair cost can be reduced.

Description

technical field [0001] The invention relates to the field of stratum restoration, in particular to a rotary drilling system and a process for in-situ restoration of soil and groundwater using the same. Background technique [0002] The phenomenon of soil and groundwater pollution in my country is prominent, and it has shown a trend of developing from point pollution to band and surface pollution. The in-situ repair method does not require pumping and ground treatment, does not require excavation, can reduce pollutant exposure, has less impact on construction, low cost, complete repair, and handles many types of pollutants. The application ratio in developed countries in Europe and the United States continues to increase. , According to different restoration mechanisms, it can be divided into physical restoration (aeration technology, electric restoration technology, etc.), chemical restoration, in-situ biological restoration and osmotic reaction wall technology. [0003] Du...

Claims

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Application Information

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IPC IPC(8): E21B7/18E21B15/00E21B21/00B09C1/00
CPCB09C1/00B09C1/002B09C2101/00E21B7/18E21B15/00E21B21/00
Inventor 王志乔孔令镕王瑜凌雪周琴刘宝林
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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