In-situ high-pressure rotary jet grouting injection repairing device for organic contaminated sites

Abstract

The invention discloses an in-situ high-pressure rotary jet grouting injection repairing device for organic contaminated sites. The in-situ high-pressure rotary jet grouting injection repairing devicefor organic contaminated sites comprises the ground and a rotary jet grouting drilling machine, a device fixing bottom plate is arranged on the outer surface of the lower end of the rotary jet grouting drilling machine; a volatile organic gas rapid detector and a control box are fixedly installed on the outer surface of the upper end of the device fixing bottom plate; the control box is located on one side of the volatile organic gas rapid detector, a high-pressure jet triple drill rod inner pipe is arranged between the control box and the volatile organic gas rapid detector, and a dispensingstation is arranged on one side of the control box. Through the arrangement of the volatile organic gas rapid detector (PID), the concentration of organic pollutants in soil can be monitored in realtime, the in-situ remediation efficiency is improved, the dosage is accurately controlled, the situation that the remediation effect cannot be achieved due to insufficient chemicals or secondary pollution is caused due to excessive chemicals is prevented, and certain use prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to an in-situ high-pressure rotary jet injection repair device for organic polluted sites. Background technique [0002] The existing high-pressure jet grouting pile technology is a foundation treatment construction technology. It is mainly used in projects such as water-stop curtains and slope protection piles in the geotechnical field. After drilling to a predetermined depth with a drilling rig, the nozzle installed at the end of the drill pipe, While rotating and spraying high-pressure fluid to cut the soil, the cement slurry is mixed with the chopped soil, and a solid cement-soil consolidation is formed after chemical reaction, which is used to improve the bearing capacity of the foundation or achieve the function of water stop. There are currently four commonly used techniques in the construction of high-pressure rotary grouting piles: double-pipe method, tripl...

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Problems solved by technology

[0004] The in-situ high-pressure rotary spraying repair method is a concealed engineering construction. At present, the amount of chemicals added during the construction process is generally collected before repairing and sent to the laboratory to detect the concentration of pollutants. After calculating the theoretical amount of chemicals added, it is enlarged by a certain amount According to the multiple, there is no ideal real-time detection method to judge whether the repair effect is up to standard after the agent is added. Generally, after the in-situ high-pressure rotary spraying repair is completed, the soil is drilled for testing.

Ordinary grouting recorders can only display and record grouting volume and grouting pressure. The "multi-functional high-pressure rotary grouting pile construction monitoring device" with application number 201811313012.4 only provides automatic monitoring of construction process parameters and does not involve pollutants in the soil concentration monitoring

[0005] Therefore, it is necessary to provide an in-situ high-pressure rotary jet injection repair device for organic polluted sites, which can monitor the concentration of organic pollutants in the soil in real time, improve the efficiency of in-situ repair, precisely control the amount of dosing, and prevent the repair effect from being insufficient. or secondary pollution caused by overdose

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