Layered monitoring system

Abstract

The utility model provides a layered monitoring system which is provided with a single-well multi-layer monitoring well, the single-well multi-layer monitoring well is connected with a detection device, the number of the single-well multi-layer monitoring well is one or more, and a water filtering layer and a water resisting layer are arranged in the single-well multi-layer monitoring well. The water filtering layer is arranged at the position where the single-well multi-layer monitoring well is communicated with a repair well branch, the water resisting layer is arranged at the position where the single-well multi-layer monitoring well is not communicated with the repair well branch, and the water filtering layer of each single-well multi-layer monitoring well is communicated with different repair well branches. Jet, horizontal directional drilling and a multi-branch well are combined and applied to underground water in-situ remediation by utilizing the multi-branch horizontal remediation well, a remediation agent is injected into a polluted aquifer through a vertical jetting and horizontal directional drilling pull-back jetting method, in-situ remediation is carried out, and large-area low-cost underground water in-situ remediation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of contaminated site restoration, and in particular to a hierarchical monitoring system based on multi-branch horizontal restoration wells for contaminated soil and groundwater. Background Art

[0002] In the prior art, the current site soil and groundwater remediation mostly adopts the vertical shaft injection method, but this method is generally based on a single well for injection, and the remediation range is small. This method requires drilling multiple wells in a certain area, which has the defects of dense wells and large construction workload. At the same time, the high-density single wells will cause large formation disturbances, the contaminated soil remediation effect is poor, the remediation construction process is complicated, and the efficiency of in-situ groundwater remediation is low. Utility Model Content

[0003] To solve the above problems, the utility model provides a layered monitoring system to solve the problems of small single well repair range, dense wellbore, large construction workload and large formation disturbance in the prior art, thereby realizing large-area low-cost in-situ groundwater repair.

[0004] The utility model provides a layered monitoring system, which has a single-well multi-layer monitoring well. The single-well multi-layer monitoring well is connected to a detection device. There are one or more single-well multi-layer monitoring wells. A water filtering layer and a water-isolating layer are arranged in the single-well multi-layer monitoring well. The water filtering layer is arranged at a position where the single-well multi-layer monitoring well is connected to a repair well branch, and the water-isolating layer is arranged at a position where the single-well multi-layer monitoring well is not connected to a repair well branch. The water filtering layer of each single-well multi-layer monitoring well is connected to a different repair well branch.

[0005] Furthermore, the repair well is a multi-branch horizontal well, and the repair well is connected to a repair device.

[0006] Furthermore, the detection device includes a monitoring sampler, a hose, and a sampling pump. The monitoring sampler is installed in the single-well multi-layer monitoring well. One end of the hose is connected to the sampling pump, and the other end of the hose is connected to the monitoring sampler.

[0007] Furthermore, there are multiple monitoring samplers, and the monitoring samplers are respectively arranged in different water filtration layers in the single-well multi-layer monitoring well.

[0008] Furthermore, there are multiple hoses, each of which is connected to a different monitoring sampler.

[0009] Furthermore, the sampling pump is a peristaltic pump or a micro submersible pump. When the groundwater level is less than 10 meters deep, the sampling pump is a peristaltic pump. When the groundwater level is greater than 10 meters deep, the sampling pump is a micro submersible pump.

[0010] Furthermore, the filler of the water filter layer is coarse quartz sand, and the filler of the water-blocking layer is bentonite or bentonite balls.

[0011] Furthermore, the multi-branch horizontal well of the repair well has branches with different layer depths, and the single-well multi-layer monitoring well has different vertical layered sampling depths.

[0012] Furthermore, the repair device includes a drilling rig, an injection drill, and an injection system, and the injection system sprays the repair agent through the injection drill.

[0013] Furthermore, the injection system injects the repair agent into different branches of the repair well.

[0014] The layered monitoring system of the utility model utilizes multi-branch horizontal remediation wells to combine jetting, horizontal directional drilling and multi-branch wells for in-situ remediation of groundwater. The remediation agent is injected into the contaminated aquifer by vertical jetting and horizontal directional drilling back-drag jetting, and the remediation is carried out in-situ, thus realizing large-scale low-cost in-situ remediation of groundwater. The layered monitoring of the multi-branch horizontal remediation well based on contaminated soil and groundwater in the utility model is to carry out multi-layer undisturbed monitoring of groundwater in a single well in combination with the distribution characteristics of the pollution plume and the remediation capacity range of the multi-branch horizontal remediation well, providing accurate monitoring conditions for the multi-branch horizontal well remediation project, and having the technical effects of simple operation, low cost, strong applicability and high operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 This is an overall schematic diagram of a hierarchical monitoring system provided by the utility model.

[0017] Description of reference numerals:

[0018] 1-single well multi-layer monitoring well, 2-repair well, 3-detection device, 4-repair device, 11-water filtering layer, 12-waterproof layer, 31-monitoring sampler, 32-hose, 33-sampling pump. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] Example 1, see attached Figure 1 The utility model provides a layered monitoring system, which has a single-well multi-layer monitoring well 1. The single-well multi-layer monitoring well 1 is connected to a detection device 3. There are one or more single-well multi-layer monitoring wells 1. A water filtering layer 11 and a waterproof layer 12 are arranged in the single-well multi-layer monitoring well 1. The water filtering layer 11 is arranged at a position where the single-well multi-layer monitoring well 1 is connected to a branch of a repair well 2. The waterproof layer 12 is arranged at a position where the single-well multi-layer monitoring well 1 is not connected to a branch of a repair well 2. The water filtering layer 11 of each single-well multi-layer monitoring well 1 is connected to a different branch of a repair well 2.

[0022] Among them, the repair well 2 is a multi-branch horizontal well, and the repair well 2 is connected to the repair device 4.

[0023] Among them, the detection device 3 includes a monitoring sampler 31, a hose 32, and a sampling pump 33. The monitoring sampler 31 is installed in the single-well multi-layer monitoring well 1. One end of the hose 32 is connected to the sampling pump 33, and the other end of the hose 32 is connected to the monitoring sampler 31.

[0024] There are multiple monitoring samplers 31, and the monitoring samplers 31 are respectively arranged in different water filtration layers 11 in the single-well multi-layer monitoring well 1, so as to extract groundwater from each layer for inspection and evaluation of the remediation of pollutants.

[0025] There are multiple hoses 32 , and each hose 32 is connected to a different monitoring sampler 31 .

[0026] Among them, according to the different hydrogeological conditions of each site, the selection of the pump connected to the monitoring sampler on the ground is also different. The sampling pump 33 is a peristaltic pump or a micro submersible pump. When the monitoring burial depth is less than 10 meters, the sampling pump 33 is a peristaltic pump. When the monitoring burial depth is greater than 10 meters, the sampling pump 33 is a micro submersible pump.

[0027] The filler of the water filter layer 11 is coarse quartz sand, and the filler of the water-blocking layer 12 is bentonite or bentonite balls.

[0028] The multi-branch horizontal well of the repair well 2 has branches with different layer depths, and the single-well multi-layer monitoring well 1 has different vertical layered sampling depths.

[0029] The repair device 4 includes a drilling rig, an injection drill, and an injection system. The injection system sprays the repair agent through the injection drill.

[0030] The injection system injects the repair agent into different branches of the repair well 2 respectively.

[0031] Among them, a plurality of single-well multi-layer monitoring wells 1 are distributed along the advancing direction of the drill bit of the multi-branch horizontal repair well, and the layout positions are determined according to the injection range of the drill bit of the multi-branch horizontal repair well.

[0032] Among them, multiple multi-layer hoses 32 are installed in the above-mentioned single-well multi-layer monitoring well 1 for sampling and monitoring aquifers at different depths. The stratified sampling depth of the single-well multi-layer monitoring well 1 can be determined according to the repair depth range of the multi-branch horizontal repair well.

[0033] Among them, the single-well multi-layer monitoring well 1 realizes disturbance-free sampling monitoring at various depths through different sealing materials and sampling devices.

[0034] The water filter layer 11 and the water-blocking layer 12 in the single-well multi-layer monitoring well 1 are separated by a layer of fine sand to prevent mutual interference between the aquifers and water layers at different sampling depths.

[0035] Example 2: A multi-branch horizontal repair well is repaired in three layers at a certain site, and the repair depths are 4 meters, 8 meters and 12 meters respectively. The diffusion range after the agent injection is 2 meters. Then, at a horizontal distance of 2 meters from the underground drill pipe of the multi-branch horizontal repair well, multiple single-well multi-layer monitoring wells 1 are constructed on both sides of the drill pipe along the direction of the drill pipe. The single-well multi-layer monitoring well 1 is divided into three layers for monitoring, and the monitoring depths are 3.5 meters to 5.5 meters, 6.5 meters to 9.5 meters, and 10.5 meters to 13.5 meters respectively. The monitoring depth of each layer can be adjusted, and the distance between two adjacent single-well multi-layer monitoring wells 1 is determined by the travel distance of the multi-branch horizontal repair well each time.

[0036] The following steps are involved in hierarchical monitoring using the above system:

[0037] Step 1, arrange single-well multi-layer monitoring wells 1 according to the repair range of the multi-branch horizontal repair well, and determine the monitoring points of each single-well multi-layer monitoring well 1 in the vertical direction according to the drill bit injection range of the multi-branch horizontal repair well;

[0038] Step 2: After the multi-branch horizontal repair well sprays the repair agent at a point underground, after the agent is diffused, the groundwater at the corresponding monitoring point is pumped to the surface using the single-well multi-layer monitoring well 1 for monitoring and analysis to evaluate the repair effect.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A layered monitoring system, comprising a single-well multi-layer monitoring well (1), wherein the single-well multi-layer monitoring well (1) is connected to a detection device (3), characterized in that: There are one or more single-well multi-layer monitoring wells (1), and a water filter layer (11) and a water barrier layer (12) are arranged in the single-well multi-layer monitoring well (1). The water filter layer (11) is arranged at a position where the single-well multi-layer monitoring well (1) is connected to a branch of a repair well (2), and the water barrier layer (12) is arranged at a position where the single-well multi-layer monitoring well (1) is not connected to a branch of a repair well (2). The water filter layer (11) of each single-well multi-layer monitoring well (1) is connected to a different branch of a repair well (2). The repair well (2) is a multi-branch horizontal well. The repair well (2) is connected to a repair device (4). The multi-branch horizontal well of the repair well (2) has branches with different layer depths. The single-well multi-layer monitoring well (1) has different vertical layered sampling depths. The repair device (4) comprises a drilling rig, an injection drill, and an injection system. The injection system sprays a repair agent through the injection drill.

2. A hierarchical monitoring system according to claim 1, characterized in that: The detection device (3) comprises a monitoring sampler (31), a hose (32), and a sampling pump (33); the monitoring sampler (31) is installed in the single-well multi-layer monitoring well (1); one end of the hose (32) is connected to the sampling pump (33), and the other end of the hose (32) is connected to the monitoring sampler (31).

3. A hierarchical monitoring system according to claim 2, characterized in that: There are a plurality of monitoring samplers (31), and the monitoring samplers (31) are respectively arranged in different water filtering layers (11) in the single-well multi-layer monitoring well (1).

4. A hierarchical monitoring system according to claim 3, characterized in that: There are a plurality of hoses (32), and each hose (32) is connected to a different monitoring sampler (31).

5. A hierarchical monitoring system according to claim 4, characterized in that: The sampling pump (33) is a peristaltic pump or a micro submersible pump. When the monitored groundwater depth is less than 10 meters, the sampling pump (33) is a peristaltic pump. When the monitored groundwater depth is greater than 10 meters, the sampling pump (33) is a micro submersible pump.

6. A hierarchical monitoring system according to claim 5, characterized in that: The filler of the water filter layer (11) is coarse quartz sand, and the filler of the water-blocking layer (12) is bentonite or bentonite balls.

7. A hierarchical monitoring system according to claim 6, characterized in that: The injection system injects the repair agent into the branches of different repair wells (2).

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