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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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 boreho

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

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

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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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