Soil in-situ detection rotary jet grouting remediation device and soil in-situ detection rotary jet grouting remediation system

Abstract

The invention discloses a soil in-situ detection jet grouting remediation device and system.The soil in-situ detection jet grouting remediation device comprises a fluorescence spectrum analysis detection system which comprises a drill rod, an optical processing module, a signal module, a control module and a power module, and the optical processing module, the signal module, the control module and the power module are installed in a conical drill bit of the drill rod; and a high-pressure rotary jet grouting system is mounted in the drill rod. The detection system rapidly detects the physical and chemical properties of the polluted soil and transmits the physical and chemical properties to the control system through a data line of the control module, and the control system regulates the dosage according to the data and accurately injects and adds the drugs in real time.

Description

Technical Field

[0001] The invention relates to the field of soil remediation, and in particular to a soil in-situ detection rotary jet remediation device and system. Background Art

[0002] In recent years, with the accelerated pace of urbanization in my country, soil pollution has become increasingly serious. The polluted sites of retired industrial enterprises contain a large amount of heavy metal pollutants and organic pollutants. The migration of soluble heavy metals in the soil poses a threat to soil and groundwater resources, causing serious consequences. In-situ injection-high pressure rotary jet technology has certain advantages in soil remediation.

[0003] High-pressure rotary spraying technology drills into the soil to a predetermined depth, then sprays a prepared agent from a nozzle to mix the agent with the contaminated soil, decomposing or fixing the pollutants and eliminating health risks.

[0004] At present, high-pressure rotary jet grouting is mostly carried out with existing geological survey data, and the existing geological survey data is obtained by digging out the soil for off-site testing, which is time-consuming, and its accuracy directly determines the quality of the rotary jet repair, resulting in low repair efficiency. At the same time, high-pressure rotary jet grouting is carried out under a fixed reagent ratio, and the degree of soil pollution in the vertical direction is difficult to be consistent, resulting in a waste of reagents. In this regard, further improvement is a problem that needs to be solved at present.

[0005] The Chinese patent with publication number CN111398327A discloses an in-situ detection device for soil heavy metal pollution based on X-ray fluorescence spectroscopy analysis, including an XRF device connected to a drill pipe and a ground terminal, the XRF device including a housing, an optical processing module, a signal processing module, a control system module and a power circuit module, a window is set on the side of the housing, the control system module is connected to the signal processing module and the ground terminal signal, and the power circuit module is electrically connected to the optical processing module, the signal processing module and the control system module. The device can only perform in-situ detection of soil heavy metal pollution, and cannot perform high-pressure jetting repair simultaneously. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a soil in-situ detection and rotary grouting repair device in view of the shortcomings of the existing technology. The device is used to first perform soil in-situ detection and then perform soil rotary grouting repair.

[0007] The present invention also provides a soil in-situ detection rotary jet repair system, which automatically adjusts the concentration of the agent for repair according to the result of the soil in-situ detection, thereby saving the agent and reducing environmental pollution.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: a soil in-situ detection rotary jet repair device, including a fluorescence spectrum analysis detection system, the fluorescence spectrum analysis detection system includes a drill rod, the optical processing module installed in the conical drill bit of the drill rod, a signal module, a control module and a power supply module, and a high-pressure rotary jet grouting system is installed in the drill rod;

[0009] The high-pressure rotary jet grouting system includes a liquid medicine channel installed in the inner cavity of the drill pipe, a center hole, and a drill pipe nozzle installed at the lower part of the drill pipe and connected to the liquid medicine channel and the bottom of the center hole respectively. The data transmission channel is connected to the signal module and the control module.

[0010] The fluorescence spectrum analysis detection system can quickly detect the physical and chemical properties of contaminated soil, and the dosage of the drug is adjusted according to the detection data and accurately injected into the high-pressure rotary jet grouting system.

[0011] After the drill rod drills the hole, water is poured through the center hole and sprayed out through the drill rod nozzle to expand the hole. The drug solution with adjusted concentration is introduced from the drug solution channel and sprayed out through the drill rod nozzle to perform soil remediation.

[0012] The high-pressure rotary jet grouting system completes grouting through the drill pipe nozzle located at the upper part of the drill bit and the lower part of the drill pipe; the key components of the fluorescence spectrum analysis and detection system, the optical module, the signal module, the control module, and the power module are located inside the conical drill bit; the fluorescence spectrum analysis and detection system and the high-pressure rotary jet grouting system do not interfere with each other according to the in-situ detection of drilling holes, the control system regulation, and the grouting repair process of the grouting system.

[0013] The optical processing module is installed at the drill head position of the conical drill head, which can detect soil more accurately with less disturbance than being installed at the lower part of the drill rod.

[0014] The prior art has technical problems such as difficulty in matching conventional detection data points with geological survey data repair points, long repair time and low efficiency. The present invention can solve this problem well.

[0015] In a preferred embodiment of the present invention, the optical processing module comprises a detection port installed on the conical surface of the conical drill bit, the detection port is installed with arc light-transmitting glass, and the optical module is installed inside the detection port.

[0016] The detection port installed on the cone surface of the conical drill bit detects soil passing through the detection port during the cone drilling process, and detection while drilling can be achieved through the optical processing module.

[0017] In a preferred embodiment of the present invention, the optical module includes an X-ray tube, a primary filter and a primary collimator connected in sequence, and also includes a light source receiving detector, a secondary collimator and a secondary filter connected in sequence, and the primary collimator and the secondary filter are both installed at an angle to the surface of the fixed plate.

[0018] The primary collimator and the secondary filter are both installed at an angle to the surface of the fixing plate. When high-energy X-rays are irradiated to the soil to be tested, the atoms in the soil are excited, the inner electrons transition, and emit secondary X-rays with specific energy or wavelength, which are collected and analyzed by the light source receiving detector. Compared with straight-line irradiation and re-reflection, the difficulty of collecting energy or wavelength can be reduced.

[0019] In a preferred embodiment of the present invention, center lines of the primary collimator and the secondary filter are symmetrical with respect to a vertical plane of the fixing plate.

[0020] In a preferred embodiment of the present invention, the angle between the center line of the secondary collimator and the secondary filter and the surface of the fixing plate is 30°-60°. The angle between the center line of the secondary collimator and the secondary filter and the surface of the fixing plate is 30°-60°, which has a good layout space inside the drill bit.

[0021] In a preferred embodiment of the present invention, the signal module includes a detection signal transmission line connected to the X-ray tube and a light source receiving detection signal line connected to the light source receiving detector. The detection signal transmission line and the light source receiving detection signal line are respectively connected to the signal module, and the signal module is then connected to the data transmission line, the control module and the power supply module in turn.

[0022] The present invention also discloses a soil in-situ detection rotary jet repair system, comprising the soil in-situ detection rotary jet repair device as described above, and also comprising an automatic drug dispensing and stirring system, the automatic drug dispensing and stirring system comprising a drug dispensing and stirring box and a clean water tank, the liquid outlet of the drug dispensing and stirring box is equipped with a drug liquid outlet pipe electric valve and is connected to the liquid inlet of a high-pressure drug dispensing pump, the liquid outlet of the clean water tank is equipped with a clean water outlet pipe electric valve and is connected to the liquid inlet of the high-pressure drug dispensing pump, the liquid outlet of the high-pressure drug dispensing pump is equipped with a drug dispensing hose, the drug dispensing hose is connected to the liquid inlet of a drug liquid channel, the liquid outlet pipe electric valve, the clean water outlet pipe electric valve and the high-pressure drug dispensing pump are all connected to a control system through a data transmission line.

[0023] The control system collects data transmitted by the fluorescence spectrum detection control system and the signal data of the drill pipe depth detector on the high-pressure rotary jet grouting control system for signal conversion to form image data displayed on the operation screen; the control system signal conversion data is matched and compared with the data in the parameter setting window to form a control signal output to the liquid medicine pipeline electric valve and the clean water pipeline electric valve of the automatic medicine supply control system.

[0024] In a preferred embodiment of the present invention, agitators are installed in both the dosing mixing tank and the clean water tank.

[0025] The principle of the fluorescence spectrum analysis detection technology of the present invention is as follows: the X-ray tube in the fluorescence spectrum analysis detection system generates X-rays under the control of the high-voltage power supply of the power module, and the X-rays are filtered by the primary filter and the primary collimator and irradiated on the soil sample in the detection window; the fluorescence excited by the soil sample is filtered by the secondary collimator and the secondary filter, and reaches the light source receiving detector crystal. The light source receiving detector circuit amplifies and counts the signal; finally, it is transmitted to the external control system through the signal module and the control module; the control system controls the different combinations of the filter, the collimator, and the tube pressure and tube flow according to the different soil samples outside the conical drill bit, and performs detection.

[0026] The technical principle of the automatic dispensing and mixing system of the present invention is as follows: the control system analyzes the soil detection signal received, and chemically reacts the remediation agent (such as an oxidizing agent or a stabilizing agent) with the soil pollutants (heavy metals or organic matter) by pre-setting the chemical reaction formula, and calculates the dosage of the agent according to the known pollutant concentration (the concentration of heavy metals or organic matter detected and analyzed) in the chemical reaction formula; the control system transmits the signal to the opening degree of the electric valve on the agent outlet pipe and the opening degree of the electric valve on the clean water outlet pipe, so as to realize accurate dosage of the agent.

[0027] The automatic supply control system contains more than two PE tanks, namely the reagent dosing tank and the clean water tank. The concentration of the reagent added in the PE tank is set to the standard concentration (such as the standard concentration of ferrous sulfate is 0.06 mol / L), and the reagent dosage data is controlled by the control system; tap water is added to the PE clean water tank; the electric valve of the system's dosing box pipeline receives the signal transmitted by the control system to control the valve opening degree, and the experimental supply of reagents is matched with the demand.

[0028] The technical principle of the high-pressure rotary jet grouting system of the present invention is as follows: the inner cavity of the drill pipe in the high-pressure rotary jet grouting system contains a center hole, a data transmission channel, and a liquid medicine channel. The center hole is a channel for conveying clean water to the borehole, the data transmission channel is a channel for transmitting the detection signal of the fluorescence spectrum analysis detection system to the external control system, and the liquid medicine channel mainly transmits the medicine pumped in by the high-pressure dosing pump through the dosing hose to the channel for grouting at the rated depth; the center hole channel and the liquid medicine channel share a drill pipe nozzle, and rubber check plates are provided inside the center hole and the liquid medicine channel near the drill pipe nozzle; the bottom of the drill pipe of the high-pressure rotary jet grouting system is sleeved with a conical drill bit and rotates with the drill pipe. The drill pipe depth detector in the high-pressure rotary jet grouting control system feeds back the grouting depth to the data analysis control system, and combines the fluorescence spectrum detection control system and the automatic drug supply data to provide data information for subsequent other uses.

[0029] The technical principle of the data analysis and control system of the present invention is as follows: the data analysis and control system analyzes the soil detection signal received, and calculates and matches the dosage of the agent according to the known pollutant concentration (the heavy metal or organic matter concentration detected and analyzed) in the chemical reaction formula by pre-setting the remediation agent (such as an oxidizing agent or a stabilizing agent) to determine the chemical reaction; the control system transmits the signal to the opening degree of the electric valve on the agent outlet pipe and to the opening degree of the electric valve on the clean water outlet pipe, thereby realizing accurate dosage of the agent.

[0030] In the present application, the fluorescence spectrum analysis detection system realizes rapid detection, the control system quickly responds to and regulates the agent, and the grouting system quickly and accurately repairs.

[0031] Compared with the prior art, the present invention has the following beneficial effects: ① The detection control system controls the X-ray tube through the power module to generate X-rays to irradiate the soil sample to be tested. The sample is excited to fluoresce and enter the detector crystal. The circuit on the detector crystal amplifies and counts the fluorescence signal and transmits it to the control system through the data line to achieve instantaneous detection; ② The high-pressure rotary jet grouting control system transmits data to the control system according to the depth of the drill pipe nozzle, and combines the detection data to achieve investigation of different stratum areas; ③ The automatic drug supply control system automatically matches the data according to the set signal given by the control system, and adjusts the electric valve of the drug pipeline and the electric valve of the clean water pipeline through the data line to achieve matching of the injected drug with the drug solution concentration required for the grouting position, and achieves drug addition repair in different stratum areas; The entire control system has fast processing speed and efficient repair, reduces the construction period, and saves drug costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the planar structure of the soil in-situ detection and jet grouting repair system of the present invention;

[0033] Figure 2 yes Figure 1Schematic diagram of fluorescence spectrum analysis and detection system;

[0034] Figure 3 yes Figure 2 Schematic diagram of the optical module.

[0035] In the figure:

[0036] 1-fluorescence spectrum analysis detection system, 1-1-conical drill bit, 1-11-detection port, 1-12-arc light-transmitting glass; 1-2-optical module, 1-21-X-ray tube, 1-22-primary filter; 1-23-primary collimator, 1-24-secondary collimator, 1-25-secondary filter, 1-26-light source receiving detector; 1-3-signal module, 1-31 detection signal transmission line, 1-32-light source receiving detection signal line, 1-33-data transmission line; 1-4-control module; 1-5-power module;

[0037] 2-high pressure jet grouting system; 2-1-drill pipe; 2-2-drill pipe nozzle; 2-3-center hole; 2-4-medicine channel; 2-5-data transmission channel;

[0038] 3-Automatic dosing and mixing system, 3-1-Dosing and mixing box, 3-11-Electric valve for liquid discharge pipe; 3-2-Clean water tank, 3-21-Electric valve for clean water discharge pipe; 3-3-Mixer; 3-4-High-pressure dosing pump; 3-5-Dosing hose; 3-6-Data transmission line;

[0039] 3-31-Data line B of electric valve for clean water pipeline; 3-32-Data line A of electric valve for liquid medicine pipeline;

[0040] 3-41-Dosing mixing box feeding metering pump;

[0041] 3-51-Level gauge for dosing mixing tank;

[0042] 4-Control system; 4-1-Operation screen; 4-2-Parameter setting window. DETAILED DESCRIPTION

[0043] Example 1

[0044] like Figure 1 As shown, a soil in-situ detection rotary jet repair system, the structure of which includes a fluorescence spectrum analysis detection system 1, a high-pressure rotary jet grouting system 2, an automatic dosage mixing system 3 and a control system 4.

[0045] like Figure 2 As shown, the fluorescence spectrum analysis and detection system 1 is composed of a conical drill bit 1-1, an optical module 1-2, a signal module 1-3, a control module 1-4, and a power module 1-5.

[0046] The conical drill bit 1-1 has a detection port 1-11 on one side of the conical surface, and a high-strength arc light-transmitting glass 1-12 is provided on the detection port; the inner cavity of the conical drill bit 1-1 wraps and fixes the optical module 1-2, the signal module 1-3, the control module 1-4, and the power module 1-5.

[0047] The optical processing module comprises a detection port 1-11 installed on the conical surface of the conical drill bit 1-1, the detection port 1-11 is installed with an arc light-transmitting glass 1-12, and an optical module 1-2 is installed inside the detection port 1-11.

[0048] like Figure 3 As shown, the optical module 1-2 includes an X-ray tube 1-21, a primary filter 1-22 and a primary collimator 1-23 connected in sequence, and also includes a light source receiving detector 1-26, a secondary collimator 1-24 and a secondary filter 1-25 connected in sequence, and the primary collimator 1-23 and the secondary filter 1-25 are symmetrical about the vertical plane of the fixing plate. The primary collimator 1-23 and the secondary filter 1-25 are both installed at an angle of 45° to the surface of the fixing plate.

[0049] like Figure 2 As shown, the signal module 1-3 includes a detection signal transmission line 1-31 connected to the X-ray tube 1-21, and a light source receiving detection signal line 1-32 connected to the light source receiving detector 1-26. The detection signal transmission line 1-31 and the light source receiving detection signal line 1-32 are respectively connected to the signal module 1-3, and the signal module 1-3 is then connected to the data transmission line 1-33, the control module 1-4 and the power module 1-5 in turn.

[0050] like Figure 1 As shown, the high-pressure rotary jet grouting system 2 is composed of a drill pipe nozzle 2-2, a center hole 2-3, a liquid medicine channel 2-4, and a data transmission channel 2-5. The drill pipe 2-1 is an acid- and alkali-resistant steel pipe lined with resin; the bottom of the drill pipe 2-1 is connected to the conical drill bit 1-1, and the top is provided with a drill pipe 2-1 connection port. The drill pipe nozzle 2-2 is arranged in the middle and lower part of the drill pipe 2-1, and the port is connected to the liquid medicine channel 2-4. The center hole 2-3, the liquid medicine channel 2-4, and the data transmission channel 2-5 are fixed in parallel to the inner cavity of the drill pipe 2-1.

[0051] like Figure 1As shown, the automatic dispensing and mixing system 3 is composed of a dosing mixing tank 3-1, a clean water tank 3-2, a mixer 3-3, a high-pressure dosing pump 3-4, a dosing hose 3-5, and a data transmission line 3-6. The dosing mixing tank 3-1 is a PE mixing barrel, with a liquid outlet pipe and an emptying pipe at the bottom, and a dosing port and a tap water inlet pipe at the top. The clean water tank 3-2 is provided with a tap water inlet pipe, and a clean water outlet pipe is provided at the bottom. The mixer 3-3 is arranged at the top of the dosing mixing tank 3-1, and a paddle stirrer is provided at the bottom of the dosing mixer 3-3. The high-pressure dosing pump 3-4 is an acid and alkali resistant high-pressure pump. The liquid outlet of the dosing mixing box 3-1 is equipped with a liquid liquid outlet pipe electric valve 3-11 and is connected to a liquid inlet of the high-pressure dosing pump 3-4. The liquid outlet of the clean water tank 3-2 is equipped with a clean water outlet pipe electric valve 3-21 and is connected to a liquid inlet of the high-pressure dosing pump 3-4. The liquid outlet of the high-pressure dosing pump 3-4 is equipped with a dosing hose 3-5, and the dosing hose 3-5 is connected to the liquid inlet of the liquid channel 2-4. The liquid outlet pipe electric valve 3-11, the clean water outlet pipe electric valve 3-21 and the high-pressure dosing pump 3-4 are all connected to the control system 4 through the data transmission line 3-6. The control system 4 is connected to the high-pressure dosing pump 3-4 and the data transmission channel 2-5 on the drill pipe 2-1 through the data transmission line 3-6.

[0052] Example 2

[0053] A decommissioned polluted site in an industrial park. Historical trace investigations showed that heavy metal pollution in the soil layer exceeded the standard, such as arsenic pollution (the first-class screening value for soil pollution risk in construction land is 20 mg / kg, and the control value is 120 mg / kg). The excess multiples of different soil layers were different. Remediation agents such as ferrous sulfate were selected, and relevant parameters were set according to the chemical reaction formula:

[0054] 4FeSO4+O2+10H2O→4Fe(OH)3+8H + +4SO4 2-

[0055] CaHAsO4·2H20+H + +SO4 2- →CaSO4↓+H2AsO4 - +2H2O

[0056] Fe(OH)3+H2AsO4 - →FeASO4·2H2O↓+OH -

[0057] 3Fe 2+ +2H2AsO4 - +8H2O→Fe3(AsO4)2·8H2O↓+4H +

[0058] When the arsenic exceeds the standard by less than 0.5-1 times, the concentration of ferrous sulfate remediation agent is 1.5 times; when the arsenic exceeds the standard by 1-2 times, the concentration of ferrous sulfate remediation agent is 2.5 times; when the arsenic exceeds the standard by 2-4 times, the concentration of ferrous sulfate remediation agent is 4.4 times; when the arsenic exceeds the standard by more than 4 times, the concentration of ferrous sulfate remediation agent is 1.1 times of the concentration exceeding the standard. This control system uses the drill bit at the bottom of the drill pipe and the fluorescence spectrum detection control system inside the drill bit to quickly detect the soil of different soil layers. The detected arsenic concentration is transmitted to the data analysis control system through the data signal line, and the matching agent concentration is selected for comparison. The concentration of the drug solution is controlled by the electric valve of the drug solution pipeline and the electric valve of the clean water pipeline. The drug solution is grouted to the repair soil layer through the drill pipe nozzle through the high-pressure rotary spraying dosing pump.

Claims

1. A soil in-situ detection rotary jet repair device, comprising a fluorescence spectrum analysis detection system (1), wherein the fluorescence spectrum analysis detection system (1) comprises a drill rod (2-1), an optical processing module installed in a conical drill bit (1-1) of the drill rod (2-1), a signal module (1-3), a control module (1-4) and a power supply module (1-5), characterized in that: A high-pressure rotary jet grouting system (2) is installed in the drill rod (2-1); The high-pressure rotary jet grouting system (2) comprises a liquid medicine channel (2-4) installed in the inner cavity of the drill rod (2-1), a center hole (2-3), a drill rod nozzle (2-2) installed at the lower part of the drill rod (2-1) and connected to the liquid medicine channel (2-4) and the bottom of the center hole (2-3), respectively; the data transmission channel (2-5) is connected to the signal module (1-3) and the control module (1-4).

2. The soil in-situ detection and jet spray repair device according to claim 1 is characterized in that: The optical processing module comprises a detection port (1-11) installed on the cone surface of the conical drill bit (1-1), the detection port (1-11) is installed with arc light-transmitting glass (1-12), and the optical module (1-2) is installed inside the detection port (1-11).

3. The soil in-situ detection and jet spraying repair device according to claim 2 is characterized in that: The optical module (1-2) comprises an X-ray tube (1-21), a primary filter (1-22) and a primary collimator (1-23) connected in sequence, and also comprises a light source receiving detector (1-26), a secondary collimator (1-24) and a secondary filter (1-25) connected in sequence, wherein the primary collimator (1-23) and the secondary filter (1-25) are both installed at an angle to the surface of the fixing plate.

4. The soil in-situ detection and jet spray repair device according to claim 3 is characterized in that: The center lines of the primary collimator (1-23) and the secondary filter (1-25) are symmetrical with respect to the vertical plane of the fixing plate.

5. The soil in-situ detection and jet grouting repair device according to claim 4 is characterized in that: The included angle between the center lines of the secondary collimator (1-24) and the secondary filter (1-25) and the surface of the fixing plate is 30°-60°.

6. The soil in-situ detection and jet spray repair device according to claim 3 is characterized in that: The signal module (1-3) comprises a detection signal transmission line (1-31) connected to the X-ray tube (1-21) and a light source receiving detection signal line (1-32) connected to the light source receiving detector (1-26); the detection signal transmission line (1-31) and the light source receiving detection signal line (1-32) are respectively connected to the signal module (1-3); and the signal module (1-3) is then connected in sequence to a data transmission line (1-33), a control module (1-4) and a power module (1-5).

7. A soil in-situ detection and jet grouting repair system, characterized in that: The soil in-situ detection rotary spray repair device comprises any one of claims 1 to 6, and also comprises an automatic drug dispensing and stirring system (3), wherein the automatic drug dispensing and stirring system (3) comprises a drug dosing and stirring box (3-1) and a clean water tank (3-2), wherein the liquid outlet of the drug dosing and stirring box (3-1) is equipped with a drug liquid outlet pipe electric valve (3-11) and is connected to the liquid inlet of the high-pressure drug dosing pump (3-4), and the liquid outlet of the clean water tank (3-2) is equipped with a clean water outlet pipe electric valve (3-11). The liquid pipe electric valve (3-21) is connected to the liquid inlet of the high-pressure dosing pump (3-4); the liquid outlet of the high-pressure dosing pump (3-4) is equipped with a dosing hose (3-5); the dosing hose (3-5) is connected to the liquid inlet of the liquid medicine channel (2-4); the liquid outlet pipe electric valve (3-11), the clean water outlet pipe electric valve (3-21) and the high-pressure dosing pump (3-4) are all connected to the control system (4) via a data transmission line (3-6).

8. The soil in-situ detection and jet grouting repair system according to claim 7 is characterized in that: Agitators (3-3) are installed in both the dosing and stirring tank (3-1) and the clean water tank (3-2).

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