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

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...

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

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