Underground water long-term monitoring and repairing well structure for in-production enterprises

Abstract

The utility model relates to the underground water pollution prevention and control technology of in-production enterprises, in particular to an underground water long-term monitoring and repairing well structure of an in-production enterprise. The well structure comprises a cover plate, a cover body, a sealing sleeve, an anchoring part, a well pipe and the like. By means of the buried hidden design, the sleeve sealing type design and the anchoring force holding type design, the well structure has good ground trafficability, underground leakproofness and stress stability. In the aspect of underground water long-term monitoring, the underground water monitoring system is effectively suitable for daily production and operation activities of enterprises in production and rolling of people and vehicles back and forth, and also ensures the ground to be flat; in the aspect of groundwater remediation, the in-situ injection device can be suitable for large-flow and high-pressure in-situ injection remediation, the injection influence radius is remarkably increased, and the groundwater remediation range is enlarged under the background that many remediation wells are not easy to arrange in the production situation.

Description

Technical Field

[0001] The utility model relates to a groundwater pollution prevention and control technology for an operating enterprise, in particular to a long-term groundwater monitoring and repair well structure for an operating enterprise. Background Art

[0002] In actual work, due to the daily production and operation activities of the operating enterprises and the intricate pipelines and structures, there are high requirements for the location selection and structural form of groundwater monitoring wells or repair wells. Traditional well structures are usually exposed above the ground, which affects the vehicle logistics of the enterprise. In addition, their tightness is poor, which affects the scope and effect of in-situ injection repair. At present, the hidden well structure design lacks a bearing unit. The collapse of the underground quartz sand filter layer and the rolling of vehicles on the ground will cause the well cover to sink and the well pipe to be damaged, making it impossible to complete the long-term monitoring or repair of groundwater in the operating enterprise. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the poor applicability of groundwater monitoring wells and repair wells in the prior art to production-related prevention and control in producing enterprises, and the inability to complete long-term monitoring or repair of groundwater in producing enterprises, and to provide a long-term monitoring and repair well structure for groundwater in producing enterprises.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A long-term groundwater monitoring and repair well structure for a producing enterprise, characterized in that the structure comprises a hidden unit, a closed unit and a holding unit;

[0006] The concealing unit is used to hide the well structure below the ground, so as to facilitate the daily production and operation of the enterprise and the passage of people and vehicles;

[0007] The closed unit is used to control the overflow of underground soil gas and the infiltration of rainwater and sewage on the ground in the monitoring well, and is also used to prevent the slurry from bubbling out of the medicine injected at high pressure and high flow rate in the repair well; the closed unit includes a sealing sleeve, a clamp and a fastening bolt, and the longitudinal section of the sealing sleeve is in the shape of a "J". The well pipe passes through the sealing sleeve and is locked by the clamp and the fastening bolt to achieve well pipe sealing.

[0008] The force-holding unit is used to ensure the stability of the well structure under stress conditions such as upper vehicle rolling over, and is also used to ensure the stability of the well structure when a repair agent is injected at high pressure and high flow.

[0009] Preferably, the concealed unit hides the well pipe below the ground through the well cover, and pours concrete above the cover eaves to form a well platform structure flush with the cement floor, wherein the cover plate of the well cover can be opened and closed;

[0010] The manhole cover includes a cover plate, a cover body and a cover eaves, and is integrally in a "hat" shape, having good structural strength and corrosion resistance.

[0011] Preferably, the sealing unit is composed of a sealing sleeve and fastening bolts. The longitudinal section of the sealing sleeve is in a "Ji" shape. The well pipe passes through the sealing sleeve and is locked by the fastening bolts to achieve the sealing of the well pipe.

[0012] The sealing sleeve has good ductility and corrosion resistance.

[0013] Preferably, the bearing unit is composed of an anchoring mechanism located below the cover eaves of the manhole cover. The anchor is inserted into the soil layer by rotating the regulating valve to fix the well structure.

[0014] The depth of insertion of the anchoring mechanism into the soil layer is inversely proportional to the bearing capacity of the soil layer.

[0015] Preferably, the sealing sleeve and the anchor are integrated in the manhole cover to form an integrated manhole cover.

[0016] The well structure further includes a well pipe with a screen pipe, a bentonite layer for sealing, and a quartz sand layer for filtering.

[0017] The present invention also provides a construction method for a long-term groundwater monitoring and remediation well structure of an in-production enterprise. The construction method includes the following steps:

[0018] A. Open a hole at the groundwater monitoring / remediation point of the enterprise's cement floor.

[0019] B. Drill to the design depth at the hole opening position.

[0020] C. Insert the well pipe with a screen pipe.

[0021] D. Fill quartz sand and bentonite in sequence at the gap between the well pipe and the soil layer.

[0022] E. Install the manhole cover at the upper end of the well pipe, put on the sealing sleeve, and tighten the fastening bolts.

[0023] F. Insert the anchor into the soil bearing layer through the regulating valve.

[0024] G. Pour concrete at the gap between the manhole cover and the well pipe, cover the cover plate, and tighten the screws.

[0025] The present invention has the following beneficial effects:

[0026] The hidden unit hides the well structure below the ground and uses a concrete well platform structure to make it flush with the surrounding cement floor, which not only facilitates the daily production of the enterprise and the passage of people and vehicles, but also ensures the safety and easy maintenance of the wellhead. The closed unit effectively controls the overflow of underground soil gas and the infiltration of rainwater and sewage on the ground, while preventing the leakage of high-pressure and high-flow repair agents, ensuring the accuracy and safety of groundwater environmental monitoring and repair. The holding unit ensures the stability of the well structure under the conditions of upper vehicle rolling and high-pressure and high-flow injection of repair agents through the anchoring mechanism located under the eaves of the well cover, thereby extending the service life and stability of the well structure.

[0027] The utility model adopts the buried hidden design, the casing sealing design, and the anchor holding design, so that the well structure has good ground passability, underground airtightness and force stability. In terms of long-term groundwater monitoring, the utility model is effectively applicable to the daily production and operation activities of the production enterprises and the situation of people and vehicles rolling back and forth, and also ensures the flatness of the ground; in terms of groundwater remediation, the utility model can be applied to large-flow, high-pressure in-situ injection remediation, significantly improving the injection impact radius, and increasing the scope of groundwater remediation in the context of production situations where it is not easy to arrange more remediation wells. In summary, the utility model greatly enhances the applicability of the well structure to the prevention and control of production in the production enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a certain embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the integrated manhole cover structure of an embodiment of the utility model.

[0030] Figure 3 This is a top view of an integrated manhole cover according to an embodiment of the utility model.

[0031] Description of the main component symbols in the accompanying drawings:

[0032] 1. Cover plate; 2. Cover body; 3. Cover eave; 4. Sealing sleeve; 5. Clamp; 6. Fastening bolts; 7. Regulating valve; 8. Anchor; 9. Well pipe; 10. Screen pipe; 11. Bentonite; 12. Quartz sand; 13. Soil layer; 14. Cement floor; 15. Concrete; 16. Screw hole. DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0034] See attached Figure 1 To Attachment Figure 3 The utility model is further described in detail with embodiments:

[0035] The structure of the well for long-term monitoring and repairing groundwater in enterprises of the utility model has good ground passability, underground airtightness and force stability through the buried hidden design, casing sealing design and anchor holding design. The main structure includes a hidden unit, a sealed unit and a holding unit.

[0036] The hidden unit hides the well pipe below the ground through the manhole cover, and pours concrete above the cover eaves to form a well platform structure flush with the cement floor, which ensures the stability of the well structure while ensuring the passability of the ground. In addition, the cover of the manhole cover can be opened and closed to facilitate groundwater sampling and testing and injection of repair agents.

[0037] The closed unit consists of a sealing sleeve and fastening bolts. The longitudinal section of the sealing sleeve is in the shape of a Chinese character "J". The well pipe passes through the sealing sleeve and is locked by the fastening bolts to achieve well pipe sealing. The sealing sleeve has good ductility and corrosion resistance, and can be used for a long time, especially under organic pollution conditions.

[0038] The force-bearing unit is composed of an anchoring mechanism located below the eaves of the manhole cover. The anchor is inserted into the soil layer by rotating the regulating valve to fix the well structure. This can effectively prevent the well structure from sinking due to ground load, and can also avoid slurry bubbling and floating of the well structure caused by high-pressure injection of repair agents.

[0039] In a specific embodiment, the thickness of the cement floor 14 of the production enterprise is 300 mm, the well opening is 220 mm, and the depth is 6.0 m.

[0040] The well pipe 9 is a PVC-U plastic pipe with an inner diameter of 63 mm, and the screen pipe 10 ranges from 1.5 m to 5.5 m.

[0041] The sealing sleeve 4, anchor 8, regulating valve 7, cover body 2 and cover eave 3 are intensively designed and integrated in the manhole cover to ensure the integrity, stability and airtightness of the structure, and are also convenient for construction.

[0042] The sealing sleeve 4 is made of nitrile rubber with a thickness of 2 mm; the anchor 8, the cover body 2 and the cover eave 3 are all made of stainless steel; the cover plate 1 is made of stainless steel with a thickness of 10 mm and is fixed to the cover body with two screws.

[0043] The anchor 8 is inserted into the soil layer 13 to a depth of 200 mm.

[0044] The cover body has a diameter of 100mm and the cover brim width is 50mm, which is convenient for placement in the drilled hole.

[0045] The bentonite 11 is selected from nano bentonite, and the specification of the quartz sand 12 is 2-4 mm.

[0046] The utility model discloses a construction method for long-term monitoring and repairing well structure of groundwater in a production enterprise, comprising the following steps:

[0047] A. Drill holes at the groundwater monitoring / remediation points on the company's cement floor;

[0048] B. Drill to the designed depth at the opening location;

[0049] C. Insert the well pipe with screen;

[0050] D. Fill the gaps between the well pipe and the soil layer with quartz sand and bentonite in sequence;

[0051] E. Install the well cover on the upper end of the well pipe, insert the sealing sleeve, and tighten the fixing bolts;

[0052] F. Insert the anchor into the soil bearing layer through the regulating valve;

[0053] G. Pour concrete on the manhole cover and gaps, cover with the cover plate, and tighten the screws.

[0054] In this embodiment, drilling and drilling: At the beginning of construction, a hole is first drilled at the monitoring or repair point of the enterprise cement floor 14. The location and depth of the hole should meet the design requirements so as to install the well pipe 9 and the corresponding sealing and supporting structure.

[0055] In this embodiment, the well pipe 9 with the screen 10 is installed: after drilling is completed, the well pipe 9 with the screen 10 is inserted into the opening. The range of the screen 10 is usually within the effective depth range of the groundwater level fluctuation, so as to effectively monitor and repair groundwater.

[0056] In this embodiment, quartz sand 12 and bentonite 11 are filled: the gap between the well pipe 9 and the soil layer is filled with quartz sand 12 and bentonite 11 in sequence. The use of these materials helps to support the well wall, keep the water flow smooth, and provide an effective medium during the repair process.

[0057] In this embodiment, the manhole cover and the sealing sleeve 4 are installed: the manhole cover is installed on the upper end of the well pipe 9, and the sealing sleeve 4 is inserted at the same time, and the fastening bolts 6 are tightened to ensure the airtightness of the well pipe 9. The "J"-shaped cross-section design of the sealing sleeve 4, combined with the fastening bolts 6, ensures the sealing performance under different geological conditions.

[0058] In this embodiment, the regulating valve 7 is inserted and anchored: the anchor 8 is inserted into the bearing layer of the soil through the regulating valve 7. This step is to stabilize the well structure, prevent the well from sinking due to ground load, and ensure the stability of the well structure when high-pressure chemicals are injected during repair.

[0059] In this embodiment, pouring concrete 15 and fixing cover plate 1: Finally, pouring concrete 15 into the manhole cover and the gap ensures the fixation of the manhole cover and cover plate 1. The design of the cover plate 1 allows it to be easily opened and closed, which is convenient for groundwater sampling and testing and injection of repair agents.

[0060] In the specific implementation, each component such as the sealing sleeve 4, the anchor 8, the cover body 2 and the cover eaves 3 are made of corrosion-resistant materials such as stainless steel to ensure durability and stability for long-term use. In addition, the selection of bentonite 11 and the specifications of quartz sand 12 are also optimized to ensure effectiveness and operability in different geological environments.

Claims

1. A long-term monitoring and repair well structure for groundwater in a production enterprise, characterized in that: The structure includes a hidden unit, a sealing unit, and a bearing unit; The hidden unit is used to hide the well structure below the ground surface, facilitating the daily production and operation of enterprises and the passage of people, vehicles, and traffic; The sealing unit is used to control the spillage of underground soil gas from the monitoring well and the infiltration of rainwater and sewage on the ground, and is also used to prevent the backflow and overflow of the chemicals injected under high pressure and high flow rate in the remediation well; The bearing unit is used to ensure the stability of the well structure under the stress of vehicle rolling on the upper part, and is also used to ensure the stability of the well structure when injecting remediation chemicals under high pressure and high flow rate.

2. The long-term monitoring and repair well structure for groundwater in a production enterprise according to claim 1, characterized in that: The hidden unit hides the well pipe (9) below the ground surface through the well cover, and pours concrete (15) above the cover eaves (3) to form a well platform structure flush with the cement floor (14). Among them, the well cover includes a cover plate (1), a cover body (2), and cover eaves (3), and the cover plate (1) of the well cover can be opened and closed.

3. The long-term monitoring and repair well structure for groundwater in a production enterprise according to claim 1, characterized in that: The sealing unit includes a sealing sleeve (4), a clamp (5), and fastening bolts (6). The longitudinal section of the sealing sleeve (4) is in a "ji" shape. The well pipe (9) passes through the sealing sleeve (4) and is locked by the clamp (5) and the fastening bolts (6) to achieve the sealing of the well pipe (9).

4. The long-term monitoring and repair well structure for groundwater in a production enterprise according to claim 1, characterized in that: The bearing unit consists of an anchoring mechanism located below the cover eaves of the well cover. The anchor (8) is inserted into the soil layer (13) by rotating the regulating valve (7) to fix the well structure.

5. The long-term monitoring and repair well structure for groundwater in a production enterprise as claimed in claim 3, characterized in that: The well pipe (9) includes a screen pipe (10).

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