CN115305861A - In-situ remediation system and method for subsurface flow zone - Google Patents

Abstract

The invention provides an in-situ repair system and a method for a subsurface flow zone, which comprises the following steps: a hydrodynamic reconstruction device; the hydrodynamic force reconstruction device comprises a plurality of artificial weirs which are detachably connected; a microorganism injection channel is arranged on the artificial weir; sha Po setting device; the Sha Po shaping device comprises a shaping top plate and a shaping bottom plate, the shaping top plate comprises a plurality of long plates and a plurality of short plates, the long plates and the short plates are alternately arranged and can be rotatably connected, and the shaping bottom plate is detachably connected with the shaping top plate; microorganism adsorption equipment. The invention utilizes the forms of the artificial weir and the riverbed Sha Po to manufacture the water head difference to form the double natural pumping phenomenon, reconstructs the riverway water power to promote the undercurrent exchange process in the undercurrent zone, and utilizes the microorganism fixing technology to ensure the biological diversity in the undercurrent zone, thereby further improving the 'health' condition of the riverway undercurrent zone and being very suitable for the repair work of the undercurrent zone of the medium and small rivers.

Description

In-situ remediation system and method for subsurface flow zone

Technical Field

The invention relates to the technical field of undercurrent zone repair, in particular to an in-situ repair system and method for an undercurrent zone.

Background

The subsurface flow zone is an important area for carrying out substance and energy exchange between surface water and underground water, and plays an important role in purifying the water quality of rivers and maintaining the river ecology. However, in recent years, with the increase of river pollution, the water purification capacity and the internal biological diversity of the river undercurrent zone are continuously reduced, the requirements of water quality purification and ecological regulation and control are difficult to meet only by means of the self-regulation capacity of the river, the water quality and the ecology of the river are seriously damaged, and the improvement of the 'health' condition of the river undercurrent zone plays a crucial role in recovering the ecology of the river. In addition, the previous research on the repair of the submerged flow zone has poor controllability and excessively complex operation steps, is only suitable for operation in a laboratory, has long experiment period and is not suitable for the repair of the submerged flow zone of a long river reach.

Therefore, the method for repairing the underflow belt, which is convenient to operate and suitable for engineering practice, is urgently sought.

Disclosure of Invention

In order to overcome the defects of the technology, the invention provides an in-situ remediation system and method for a subsurface flow zone, which adopts engineering measures to fix microorganisms in the subsurface flow zone to maintain the biological diversity of the subsurface flow zone, thereby forming a hydrodynamic-ecological combined in-situ remediation system for the subsurface flow zone. In addition, the invention also has certain water quality purification capacity.

The technical scheme adopted by the invention for overcoming the technical problems is as follows: an in-situ remediation system and method for a subsurface flow zone comprises the following steps:

a hydrodynamic reconstruction device; the hydrodynamic reconstruction device comprises a plurality of artificial weirs which are detachably connected; a microorganism injection channel is arranged on the artificial weir;

sha Po setting device; the Sha Po shaping device comprises a shaping top plate and a shaping bottom plate, wherein the shaping top plate comprises a plurality of long plates and a plurality of short plates, the long plates and the short plates are alternately arranged and can be rotatably connected, and the shaping bottom plate is detachably connected with the shaping top plate;

microorganism adsorption equipment.

Preferably, the device also comprises an auxiliary water flow exchange device.

Preferably, the artificial weir comprises a framework, and a rubber layer is arranged on the framework; the artificial weir is provided with a counterweight chamber, the counterweight chamber is provided with a counterweight inlet, and the counterweight inlet is provided with a waterproof cover.

Preferably, the bottom of the artificial weir is provided with a lower water passing channel.

Preferably, both sides of the artificial weir are provided with water stopping structures.

Preferably, the water stopping structure comprises a water stopping tank.

Preferably, the lower end of the shaping top plate is provided with a plurality of clamping grooves, and the shaping bottom plate can be sequentially inserted into the clamping grooves.

Preferably, the microorganism adsorption device comprises a biological activated carbon thin plate, and a plurality of openings are formed in the biological activated carbon thin plate.

Preferably, the auxiliary water flow exchange device is a flow impeller.

The invention also discloses a repairing method based on the undercurrent zone in-situ repairing system, which is characterized by comprising the following steps:

s1, determining the width of a target river so as to determine the single size and the required number of an artificial weir, a Sha Po shaping device and a microorganism adsorption device;

s2, leveling the positions of the artificial weirs to a certain degree, placing each artificial weir at a preset position, and connecting each artificial weir;

s3, analyzing the components of the sand in each proportion in the underflow zone of the target river and manually proportioning similar sand to increase the adhesion between the sand and the target river bed;

s4, inversely placing the shaping top plate of the Sha Po shaping device, adjusting the angle between the long plate and the short plate to enable the shaping top plate to be in an artificial sand slope shape, filling proportioned sand into a space formed by the long plate and the short plate, and installing the shaping bottom plate;

s5, properly flattening the target river bed in the area Sha Po, placing the configured sand slope shaping device at a specified position, detaching the shaping bottom plate, applying vertical acting force to the long plate and the short plate to bond the artificial sand slope and the target river bed, and drawing out the long plate and the short plate;

s6, attaching the microorganism adsorption device to the artificial sand slope and the surface of a target river bed, and injecting the needed microorganisms into the microorganism injection channel.

Compared with the prior art, the invention has the beneficial effects that:

1. the method adopts a mode of artificially reconstructing the hydrodynamic force to improve the undercurrent exchange condition of the undercurrent zone, utilizes the principle of increasing the pumping intensity to obviously improve the exchange rate of surface water and underground water, and combines hydrodynamic force reconstruction and microorganisms to repair the undercurrent zone in a two-way manner so as to recover the hydrodynamic force and the ecological function of the undercurrent zone.

2. All parts of the invention are detachable and assembled devices. Compare the integral type device, the geometric dimension that the assembled design is convenient for prepare the target river according to different river conditions, and the actual operation of being convenient for is lower and be convenient for to construction equipment's requirement during the construction, also be convenient for replace if certain position breaks down, reduces various unexpected circumstances in the work progress. In addition, the assembly structure design is also beneficial to long-distance transportation.

3. The Sha Po shaping device is a combined supporting structure which is high in strength and light in material, the left side and the right side of a triangle are in a geometric shape with a long left side and a short right side, and the top point and the side foot are connected in a hinged mode, so that various sand slope shapes can be conveniently controlled, and the applicability is high. In addition, the artificial sand slope is formed by artificially proportioning sand according to the specific subsurface flow zone components of the target river, and has weak repulsion and interference with the in-situ subsurface flow zone and better cohesiveness.

4. The microbial adsorption device is a pollution-free porous biological activated carbon thin plate, the design of the porous structure ensures that the device has no barrier effect on the exchange process of river undercurrent, the biological activated carbon has a certain fixing effect on microbes and can achieve good microbial fixing effect without treating the thin plate by an additional surfactant, and the thin plate can adsorb various nutrient substances required by microbial biochemical reaction and is more favorable for accelerating the undercurrent restoration rate.

5. The invention can carry out step repair work. The water flow exchange rate in the repair interval of the underflow area can be accelerated by matching with the impeller, and the method has the advantage of repairing the river underflow area in a long distance.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a hydrodynamic reconstruction device in accordance with an embodiment of the present invention.

Fig. 3 is a side view of fig. 2.

Fig. 4 is a schematic structural diagram of a Sha Po sizing device in an embodiment of the present invention.

FIG. 5 is a schematic structural view of a microorganism adsorption apparatus according to an embodiment of the present invention.

In the figure, 100, a hydrodynamic reconstruction device; 101. an artificial weir; 102. a counterweight chamber; 103. a counterweight entrance; 104. a waterproof cover; 105. fixing and splicing screw holes; 106. a microbial injection channel; 107. a lower water passage; 108. a water stopping structure; 200. sha Po setting device; 201. a long plate; 202. a short plate; 203. a card slot; 300. a microbial adsorption device; 301. a bioactive carbon sheet; 302. opening a hole; 400. a flow impeller.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Examples

A subsurface flow zone in situ remediation system, as shown in fig. 1, comprising: the device comprises a hydrodynamic force reconstruction device 100, a sand slope shaping device 200 and a microorganism adsorption device 300. The hydrodynamic reconstruction device 100 utilizes the artificial weir to improve the target river head condition and enhance the pumping capacity of the river, and is a main hydrodynamic reconstruction measure; sha Po the setting device 200 prepares Sha Poxing riverbed according to target river conditions, belongs to a secondary hydrodynamic reconstruction measure, and further enhances pumping effect by combining with a primary hydrodynamic reconstruction measure; the microorganism adsorption device 300 can fix microorganisms without obstructing the exchange process of river undercurrent by adsorbing the microorganisms.

As shown in fig. 2 and 3, the hydrodynamic force reconstruction device 100 includes a plurality of artificial weirs 101, and further, the artificial weirs 101 may include a frame made of high-strength synthetic fiber fabric, the frame is a triangular stable structure, the frame is provided with a rubber layer, the rubber layer is made of waterproof natural rubber material, the thickness of the rubber layer is appropriate, the rubber layer is tightly attached to the frame, in order to ensure the bearing function of the artificial weirs 101, the artificial weirs 101 are provided with a counterweight chamber 102, the counterweight chamber 102 is provided with a counterweight inlet 103, and the counterweight inlet 103 is provided with a waterproof cover 104, so that the river water is difficult to penetrate into the artificial weirs 101 after the artificial weirs are closed. To further ensure that the hydrodynamic force reconstruction device 100 is strong enough to support the counterweight, two fixing and splicing screw holes 105 are formed on both sides of the artificial weir 101 for splicing a plurality of artificial weirs 101. The artificial weir 101 is provided with a microorganism injection channel 106, the microorganism injection channel 106 can be arranged longitudinally and transversely, and the microorganism injection channels 106 of the adjacent artificial weirs 101 can be communicated, so as to facilitate microorganism injection.

Further, the bottom of the artificial weir 101 can be provided with a lower water passage 107 to ensure the water flow of the river channel is smooth in the dry period.

Further, water stopping structures 108 may be disposed on both sides of the artificial weir 101 to improve the water resistance of the assembled artificial weir 101, and the water stopping structures 108 may include water stopping grooves with suitable width.

As shown in fig. 4, sha Po setting device 200 is high in overall strength but lighter in material, including design roof and design bottom plate, the design roof comprises triangle stable structure by a plurality of long boards 201 and a plurality of short boards 202, and long boards 201 and short boards 202 arrange in turn and both rotatable coupling, can adopt weak gear hinge interlock, can maintain the triangle structure and be convenient for angle modulation again, the design bottom plate can be dismantled with the design roof and be connected, the both sides lower extreme of design roof can set up a plurality of draw-in grooves 203 respectively, the design bottom plate can insert in a plurality of draw-in grooves 203 in proper order, has the effect that prevents inside gravel loss and sand slope deformation when placing Sha Po setting device 200.

As shown in fig. 5, the microbial adsorption device 300 may include a biological activated carbon thin plate 301, the biological activated carbon thin plate 301 is made of biological activated carbon, which is green, pollution-free and cheap, and meets the requirement of mass use, the biological activated carbon thin plate 301 is distributed with a plurality of openings 302, and the openings 302 may be hexagonal holes, so as to fix microbes without hindering the process of undercurrent exchange.

Further, the repair system may further include an auxiliary water flow exchange device, which may be a flow impeller 400.

The repair method based on the in-situ repair system of the subsurface flow zone comprises the following steps:

s1, determining the width of a target river so as to determine the single size and the required number of the artificial weir 101, the Sha Po sizing device 200 and the microorganism adsorption device 300; placing the artificial weirs 101 at the bank of the target river, opening the waterproof covers 104 of the artificial weirs 101, placing soil, stones and the like into the waterproof covers to balance the weight chamber 1, and sealing the weight inlets 103 again;

s2, leveling the weir placing position to a certain degree, placing each artificial weir 101 at a preset position, connecting each artificial weir 101 through a fixed splicing screw hole 105, communicating microorganism injection channels 106 of each artificial weir 101, and inserting a water stop belt at a water stop groove between the weir and the weir;

s3, sampling the target river underflow zone, analyzing the components of the sand in each proportion of the target river underflow zone, and manually proportioning similar sand to increase the adhesion between the sand and the target river bed;

s4, inversely placing the shaping top plate of the Sha Po shaping device 200, adjusting the angle between the long plate 201 and the short plate 202 to enable the shaping top plate to be in an artificial sand slope shape, filling proportioned sand into a space formed by the long plate 201 and the short plate 202, inserting the shaping bottom plate into the clamping groove 203, and positively placing the sand slope shaping device 200;

s5, properly flattening the target riverbed in the artificial Sha Po area, placing the configured sand slope shaping device 200 at a specified position, detaching the shaping bottom plate, applying vertical acting force to the long plate 201 and the short plate 202 to bond the artificial sand slope with the target riverbed, slowly drawing out the long plate 201 and the short plate 202, forming the artificial sand slope riverbed shape, and repeating the operation until the target area is fully paved;

s6, cutting the biological activated carbon thin plate 301 into a shape suitable for the artificial sand slope and the target river bed, sticking the biological activated carbon thin plate on the artificial sand slope and the target river bed surface one by one, and anchoring the biological activated carbon thin plate to prevent the biological activated carbon thin plate from drifting; injecting a specific microorganism solution into the microorganism injection channel 106 according to the target river condition, so that the microorganism solution is diffused and adsorbed onto the biological activated carbon sheet 301;

and S7, a repair system can be arranged in a certain downstream area according to the water level condition to form a step adjustment repair system, the flow velocity condition of water flow in each interval is measured, the water flow in the specific area can be accelerated by using the flow pusher 400, and the smooth flow of the water flow in the river channel is ensured.

The invention tightly combines hydrodynamic reconstruction and microorganism remediation, achieves the effect of fixing microorganisms by utilizing the adsorption effect of the biological activated carbon on the microorganisms, does not need an additional surfactant treatment device, and decomposes pollutants in the river water body through the biochemical reaction of the microorganisms, thereby purifying the water body and reducing the problem of blockage of the undercurrent zone. In addition, under the combined action of the hydrodynamic force reconstruction device 100, the sand slope shaping device 200 and the microorganism adsorption device 300, the hydrodynamic force condition in the original river channel is changed, the water head difference required by the pumping action is artificially increased, and the undercurrent exchange rate in the undercurrent band is remarkably accelerated.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An in situ undercurrent zone repair system, comprising:

a hydrodynamic reconstruction device; the hydrodynamic force reconstruction device comprises a plurality of artificial weirs which are detachably connected; a microorganism injection channel is arranged on the artificial weir;

sha Po setting device; the Sha Po shaping device comprises a shaping top plate and a shaping bottom plate, the shaping top plate comprises a plurality of long plates and a plurality of short plates, the long plates and the short plates are alternately arranged and can be rotatably connected, and the shaping bottom plate is detachably connected with the shaping top plate;

microorganism adsorption equipment.

2. The undercurrent zone in-situ remediation system of claim 1, further comprising auxiliary water flow exchange means.

3. The in situ remediation system of claim 1, wherein the man-made weir comprises a skeleton, a rubber layer being provided on the skeleton; the artificial weir is provided with a counterweight chamber, the counterweight chamber is provided with a counterweight inlet, and the counterweight inlet is provided with a waterproof cover.

4. The in-situ remediation system for a subsurface flow zone of claim 1 or claim 3, wherein the bottom of said artificial weir is provided with a lower water passage.

5. The in-situ remediation system for a subsurface flow zone as claimed in claim 1 or claim 3 wherein the artificial weir is provided with water stopping structures on both sides.

6. The undercurrent belt in situ remediation system of claim 5, wherein the water stopping structure comprises a water stopping trough.

7. The in-situ subsurface flow zone repair system according to claim 1, wherein the lower end of the shaped top plate is provided with a plurality of slots, and the shaped bottom plate can be inserted into the slots in sequence.

8. The in situ remediation system of claim 1 wherein said microbial adsorbing means comprises a sheet of biologically active carbon having a plurality of openings formed therein.

9. The undercurrent zone in-situ remediation system of claim 2, wherein the auxiliary water flow exchange device is a flow impeller.

10. A method of remediation based on the in situ remediation system for a subsurface flow zone of any one of claims 1 to 9, comprising the steps of:

s1, determining the width of a target river so as to determine the single size and the required number of an artificial weir, a Sha Po shaping device and a microorganism adsorption device;

s2, leveling the positions of the artificial weirs to a certain degree, placing each artificial weir at a preset position, and connecting each artificial weir;

s3, analyzing the components of the sand in each proportion in the underflow zone of the target river and manually proportioning similar sand to increase the adhesion between the sand and the target river bed;

s4, inversely placing the shaping top plate of the Sha Po shaping device, adjusting the angle between the long plate and the short plate to enable the shaping top plate to be in an artificial sand slope shape, filling proportioned sand into a space formed by the long plate and the short plate, and installing the shaping bottom plate;

s5, properly flattening the target river bed in the area Sha Po, placing the configured sand slope shaping device at a specified position, detaching the shaping bottom plate, applying vertical acting force to the long plate and the short plate to bond the artificial sand slope and the target river bed, and drawing out the long plate and the short plate;

s6, attaching the microorganism adsorption device to the artificial sand slope and the surface of a target river bed, and injecting the needed microorganisms into the microorganism injection channel.

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