CN105625295B - Foundation ditch water recharge system - Google Patents
Foundation ditch water recharge system Download PDFInfo
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- CN105625295B CN105625295B CN201610132537.2A CN201610132537A CN105625295B CN 105625295 B CN105625295 B CN 105625295B CN 201610132537 A CN201610132537 A CN 201610132537A CN 105625295 B CN105625295 B CN 105625295B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
Abstract
The invention discloses a kind of foundation ditch water recharge system, including backwash unit and the pumped well, one-level storage tank, aeration unit, grade one filter, secondary filter, two grades of storage tanks and the inverted well that are sequentially connected, the backwash unit is connected with grade one filter, secondary filter respectively；The system also includes control process unit and the water level monitoring unit being connected respectively with pumped well, two grades of storage tanks and inverted well, and control process unit includes the control subelement that draws water being connected with pumped well, the water processing control subelement and the recharge being connected with inverted well and flow control subelement that are connected with recharge Water quality processing system.The foundation ditch water recharge system of the present invention is able to ensure that foundation ditch periphery will not cause surface subsidence because of precipitation; the water quality of optimization recharge water is also truly realized simultaneously; after recharge Water Spreading the water level decreasing of local ground watering, water quality will not be caused to degenerate and pollute; blocking of recharge well is not resulted in, recharge effect is good yet.
Description
Technical field
The invention belongs to the base pit engineering technical field in municipal administration, building engineering field rock engineering, it is related to base pit dewatering
A kind of recharging technique field, and in particular to foundation ditch water recharge system.
Background technology
The environmental problem relevant with base pit engineering mainly includes：The all surface subsidence in hole, the decline of all underground water in hole, cheats week soil
Body is displaced sideways into hole, sedimentation, inclination and the crack of neighbouring buildings or structures, sedimentation and displacement of all comprehensive pipelines in hole etc..
Excavation of foundation pit and base pit dewatering are the main cause for triggering all environmental problems in hole, excavation of foundation pit depth, the water of foundation pit supporting construction
Flat displacement and because caused by base pit dewatering around foundation ditch level of ground water reduction be trigger hole week deformation major influence factors, and
Level of ground water reduction is the leading factor for triggering surface subsidence outside 2 times of cutting depth scopes of foundation ditch.Caused by base pit dewatering
Hole Zhou Shuiwei reductions cause native Pore Pressure transfer, dissipated, and have not only broken the original mechanical balance of the soil body, effective stress
Increase；And in the range of cone of depression, hydraulic gradient increase is increased with the penetration that body force form is acted on the soil body
Greatly.The two is coefficient as a result, sedimentation and deformation occurs for hole Zhou Tuti.Therefore, during foundation pit construction, effectively control hole is all
WATER LEVEL CHANGES, is the key that all surface subsidence deformations are cheated in control caused by precipitation.
To eliminate or reducing influence of the base pit dewatering to surrounding environment, generally using the method for setting water-stop curtain, still
The cost of water-stop curtain is higher, and difficulty of construction is larger, easily permeates.In view of the above-mentioned deficiency of water-stop curtain, underground water
Recharge method is gradually promoted.
It is the most direct of hole Zhou Tuti groundwater level change of the control caused by base pit dewatering to implement groundwater recharge
Means.But, artificial recharge underground water needs to keep a close eye on the water quality of recharge water, in order to avoid make underground water because of recharge by dirt
Dye.The water quality of recharge water must be better than the water quality of former underground water, reach the standard of drinking water；Region underground will not be caused after recharge
The water quality of water degenerates and polluted.Meanwhile, can't contain in recharge water can make the special ion or gas of well pipe corrosion.In addition,
Existing groundwater recharge system in use for some time, is also easy to because of suspension, bubble, chemical precipitation, microorganism growth
And the reason for the fine grained medium in water-bearing layer itself, blocking of recharge well is caused, influence recharge effect.
The content of the invention
It is an object of the invention to overcome the shortcomings of above-mentioned prior art presence, there is provided a kind of foundation ditch groundwater recharge system
System.The foundation ditch water recharge system causes foundation ditch periphery groundwater level not continuous decrease, Neng Goubao during base pit dewatering
Hold constant water level, it is ensured that foundation ditch periphery will not cause surface subsidence because of precipitation；More importantly it is truly realized optimization recharge
After the water quality of water, recharge Water Spreading the water quality of local ground watering will not be caused to degenerate and pollute, and without well can be made in recharge water
The special ion or gas of pipe corrosion, do not result in blocking of recharge well, recharge effect is good.
The purpose of the present invention is realizing by the following technical programs：
The present invention relates to a kind of foundation ditch water recharge system, including be sequentially connected pumped well, recharge water quality processing system
System and inverted well, the recharge Water quality processing system include backwash unit and be sequentially connected one-level storage tank, aeration unit,
Grade one filter, secondary filter, two grades of storage tanks, the backwash unit respectively with grade one filter, secondary filter phase
Even；The foundation ditch water recharge system also include control process unit and respectively with pumped well, two grades of storage tanks and recharge
The connected water level monitoring unit of well, the control process unit includes draw water control subelement and the recharge being connected with pumped well
The connected water processing control subelement of Water quality processing system and the recharge being connected with monitoring holes, inverted well and flow control
Unit.
It is preferred that, the first immersible pump is provided with the pumped well, the first immersible pump pipeline water outlet is through three-way pipe, respectively with one
Level storage tank, two grades of storage tanks, external discharge-channels are connected；Electromagnetism is provided with the first immersible pump pipeline at three-way pipe
Valve, the magnetic valve is connected with the control subelement that draws water.
It is preferred that, the aeration unit includes aeration tank and for the air compressor machine to aeration tank oxygen supply, at the top of aeration tank
Water inlet is connected with the delivery port of one-level storage tank by pipeline, is aerated the delivery port of pot bottom and the water inlet of grade one filter
It is connected；Backwash discharge outlet, exhaust outlet are additionally provided with the top of aeration tank, bottom is additionally provided with backwash water inlet, the backwash water inlet
It is connected with backwash unit.
It is preferred that, the backwash unit includes backwashing pump, and the backwashing pump is arranged on the backwash of two grades of storage tanks
On the total pipeline that delivery port is connected with the backwash water inlet of secondary filter, the backwash water inlet of grade one filter；The water
Processing control subelement is connected with backwashing pump, controls it to backwash secondary filter, grade one filter.
It is preferred that, the recharge and flow control subelement are controlled using the recharge of solar energy automatic start-stop and flow control cabinet
Water level in inverted well；The water level monitoring unit monitors recharge groundwater level using solar energy water level detection case, and by periphery
The water level of monitoring automatically controls the recharge amount of recharge system.
It is preferred that, from bottom to top provided with drainage bottom plate, quartz sand thickness and quartz sand filter media layer in the grade one filter；
The thickness of the quartz sand thickness is 2~8mm, and the thickness of the quartz sand filter media layer is 1.4~1.8m.
It is preferred that, the quartz sand filter media layer is laid using level with quartz sand filter media, and the level matches somebody with somebody quartz sand filter media
Particle diameter be respectively 0.5~1.2mm, 1~2mm.
It is preferred that, the drainage bottom plate uses porous plate, the porous plate provided with spacing 60mm, quincuncial arrangement it is some
DN25 water filtering caps.
It is preferred that, filter screen, SS filtrates filtering layer and PP cotton composite screens are provided with the secondary filter from bottom to top；It is described
The thickness of SS filtrate filtering layers is 1.2~1.5m, and the thickness accounts for the 40~50% of secondary filter internal height.
It is preferred that, in the secondary filter between SS filtrates filtering layer and PP cotton composite screens, it is more than SS filtrate filtering layers according to
It is secondary to be equipped with the compound manganese sand filtration bed of material, quartzy sand filter blanket；The thickness of the compound manganese sand filtration bed of material is 0.3~0.5m, the stone
The thickness of sand filtering layer is 0.2~0.4m.
Compared with prior art, the present invention has the advantages that：
1st, cause foundation ditch periphery groundwater level not continuous decrease during base pit dewatering, constant water level can be kept, really
Surface subsidence will not be caused because of precipitation by protecting foundation ditch periphery；
2nd, after being truly realized the water quality of optimization recharge water, recharge Water Spreading the water quality of local ground watering will not be caused to degenerate
And pollution；
3rd, the special ion or gas of well pipe corrosion can be made by being practically free of in recharge water；
4th, level is significantly improved with the secondary filtration effect that by-pass filtration effect and particular filter media are set, and returns
The fine grained of suspension, bubble, chemical precipitation, microorganism growth and water-bearing layer in pouring water has obtained farthest going
Remove, significantly reduce blocking of recharge well phenomenon, greatly improve recharge effect.
Brief description of the drawings
By reading the detailed description made with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the technical principle route schematic diagram of foundation ditch water recharge system；
Fig. 2 is the process chart of foundation ditch water recharge system；
Fig. 3 is the structural representation of foundation ditch water recharge system；
Fig. 4 is the technical principle route schematic diagram of water level monitoring unit；
Fig. 5 is the structural representation of aeration tank；
Fig. 6 is the cross-sectional view of grade one filter；
Fig. 7 is the surface structure schematic diagram of secondary filter；
Fig. 8 is the diagrammatic cross-section of secondary filter；
Wherein, 1, pumped well, 2, one-level storage tank, 3, air compressor machine, 4, aeration tank, 5, grade one filter, 6, secondary filtration
Device, 7, two grades of storage tanks, 8, inverted well, 9, backwashing pump, 10, first flowmeter, 11, second flowmeter, the 12, first diving
Pump, the 13, second immersible pump, 14, solar energy automatic start-stop pumping box, 15, water processing control case, 16, solar energy automatic start-stop returns
Fill and flow control cabinet, 17, solar energy water level detection case, 21, one-level storage tank water inlet, 22, one-level storage tank delivery port,
23rd, one-level storage tank gap, 24, one-level storage tank sewage draining exit, 41, aeration tank water inlet, 42, aeration tank delivery port, 43,
Aeration tank backwash water inlet, 44, aeration tank backwash discharge outlet, 45, aeration tank exhaust outlet, 46, aeration board, 51, grade one filter
Water inlet, 52, grade one filter delivery port, 53, grade one filter backwash water inlet, 54, grade one filter backwash discharge outlet,
55th, grade one filter exhaust outlet, 56, drainage bottom plate, 57, quartz sand thickness, 58, flow-stopping plate, 61, secondary filter water inlet,
62nd, secondary filter delivery port, 63, secondary filter backwash water inlet, 64, secondary filter backwash discharge outlet, 65, two grades of mistakes
Filter exhaust outlet, 66, secondary filter charging aperture, 67, secondary filter discharging opening, 611, filter screen, 612, SS filter material layers,
613rd, it is combined the manganese sand filtration bed of material, 614, quartzy sand filter blanket, 615, PP cotton composite screens, 71, two grades of storage tank water inlets, 72, two
Level storage tank delivery port, 73, gap, 74, sewage draining exit, 75, two grades of storage tank backwash delivery ports.
Embodiment
With reference to embodiment, the present invention is described in detail.Following examples will be helpful to those skilled in the art
The present invention is further understood, but the invention is not limited in any way.It should be pointed out that to one of ordinary skill in the art
For, without departing from the inventive concept of the premise, it can also make certain adjustments and improvements.These belong to the guarantor of the present invention
Protect scope.
The technical principle route of the foundation ditch water recharge system of the present invention to the Well Water Level that draws water as shown in figure 1, supervise
Survey, as judged that recharge need to be carried out, then control to set immersible pump groundwater abstraction in pumped well, that is, carry out foundation ditch and take out precipitation；To extracting
Underground water carry out water examination, it is qualified if can directly carry out water purification recharge, it is unqualified if enter sedimentation basin and carry out silt
Precipitate, through aeration tank aerating oxidation, through removing the removal of impurity, iron containing one-level, the groundwater treatment system filtration treatment of secondary filter
After manganese, water purification storage tank is delivered to, water examination is carried out again, it is qualified rear into water purification recharge, it is unqualified then to be sunk again
Shallow lake pond, is precipitated, is aerated, filtration treatment successively；Solar energy automatic start-stop groundwater treatment and recharge control system to one-level,
The Inlet and outlet water pressure drop of secondary filter is monitored control, starts counter-flushing process when pressure drop is too low, water purification storage tank is passed through
The qualified water outlet reverse pumping of water examination delivers to two grades, grade one filter backwashed；The flow of above-mentioned water purification recharge it is specific by
Inverted well water level monitoring and control system control, and alternately recharge and Hui Yang are controlled by it, interrupt recharge.
Specifically, foundation ditch water recharge system of the invention includes following 11 systems：
1) artificial cognition：The clean degree of underground water, which reaches, can be not required to processing during standard, be directly entered the control of 3 recharge flows.Profit
Security interval is in water level in inspection well in solar energy water table measure system control hole.
2) precipitate：The ferromanganese ion that groundwater abstraction is stored in storage tank (sedimentation basin), underground water exposes in atmosphere
After oxidation, the sediment such as generation ferric oxide, manganese dioxide.
3) flow is controlled：In storage tank (sedimentation basin), flowmeter, the water of control process are set between filter；Net
Flowmeter is set to control the water of recharge after water storage tank.The underground water shunting of not recharge.
4) it is aerated：Acted on by the oxygenation for being aerated filling+air compressor machine, promote the oxonium ion in ferromanganese ion and air
Reaction is learned, the sediments such as ferric oxide, manganese dioxide are generated.
5) general filtering：By quartz sand filter media filter etc., greater particle size impurity in preliminary filtering underground.
6) ferrimanganic is filtered：By SS filtering material filters etc., iron and manganese oxides in underground water etc. are removed.
7) water storage：By the clean underground water after two grades of storage tank storage filterings, certain moisture storage capacity is remained, in case returning
Fill.
8) backwash：When filter import and export pressure drop does not reach recharge requirement, backwash is opened.
9) recharge：Foundation ditch extract underground water through water examination it is qualified after can directly recharge, otherwise should pass through water treatment
System processing, and through water examination it is qualified after can recharge, utilize solar energy water table measure system control inverted well in water
Position.
10) Hui Yang：Supercharging blowback is set to raise underground water in inverted well, recharge, Hui Yang are alternately.
11) monitor：Recharge groundwater level is monitored by the automatic monitoring unit of solar energy level of ground water, and monitored by periphery
Water level automatically control the recharge amount of recharge system.
The specific embodiment of foundation ditch water recharge system is as follows：
Embodiment 1
The present embodiment is related to a kind of foundation ditch water recharge system, and its structural representation is as shown in figure 3, including being sequentially connected
Pumped well 1, one-level storage tank 2, aeration unit, grade one filter 5, secondary filter 6, two grades of storage tanks 7 and inverted well 8,
Also include backwash unit, control process unit and water level monitoring unit；It is described backwash unit respectively with grade one filter 5,
Secondary filter 6 is connected；The water level monitoring unit is connected with pumped well 1, two grades of storage tanks 7 and inverted well 8 respectively；Institute
Drawing water of stating that control process unit includes being connected with pumped well 1 controls subelement, at the water that is connected with recharge Water quality processing system
Reason control subelement and the recharge being connected with inverted well 8 and flow control subelement.It is preferred real as one of the present embodiment
Scheme is applied, water processing control subelement is additionally included in the delivery port and grade one filter of the bottom of aeration tank 4 of connection aeration unit
The first flowmeter 10 set on the pipeline of 5 water inlet, and then the control to the water of processing is realized, it is included in secondary filtration
The second flowmeter 11 set on the pipeline that the delivery port of device 6 is connected with inverted well 8, and then the water of realization control recharge,
And control the underground water shunting of not recharge.
In the present embodiment, the water level monitoring unit uses solar energy water level automatic monitoring unit (solar energy water level detecting
Case 17)；Security interval (Fig. 4) is in using water level in inspection well in the solar energy water level detection case 17 control hole.
The first immersible pump 12 is provided with the pumped well, water is pumped out through three-way pipe, respectively with one-level storage tank 2, two grades of storages
Water tank 7, external discharge-channel are connected；Water is pumped out (to take out using solar energy automatic start-stop in the present embodiment in the control subelement that draws water
Water management case 14) control under, do not need recharge situation directly externally discharge；Directly returned after qualified by water examination
Fill；In the case of water examination is underproof, towards after the precipitation process of one-level storage tank 2, water outlet is successively through aeration unit, one-level
After filter 5, the filtration treatment of secondary filter 6, into two grades of storage tanks 7, recharge is carried out after reaching recharge water level requirement.
The top of one-level storage tank 2 is provided with water inlet 21, and side wall is provided with to correspond on delivery port 22, opposite side wall and preset
Gap 23 is provided with spilling water water level, bottom is provided with sewage draining exit 24.
The aeration unit includes aeration tank 4 (Fig. 5) and for the air compressor machine 3 to the oxygen supply of aeration tank 4, the top of aeration tank 4
Water inlet 41 be connected with the delivery port 22 of one-level storage tank 2 by pipeline, the delivery port 42 of the bottom of aeration tank 4 and one-level mistake
The water inlet 51 of filter 5 is connected, and the top of aeration tank 4, which is additionally provided with backwash discharge outlet 44, exhaust outlet 45, (can also set automatic deflation
Valve), bottom is additionally provided with backwash water inlet 43 (being connected with the backwashing pump for backwashing unit), and the pipeline being related to uses galvanized steel
Pipe, screwed connection.The air that air compressor machine 3 is provided is through the aeration board 46 in pipeline to aeration tank 4, by aeration board 46
Solarization air cap realize underground water in tank oxygen supply aeration.
Water inlet 51, exhaust outlet 55 and backwash discharge outlet 54 are provided with the top of the grade one filter 5 (Fig. 6), bottom is provided with
Delivery port 52 and backwash water inlet 53, the side wall corresponding with the top of internal filtrate filling region of grade one filter 5 are provided with
Charging aperture, the side wall corresponding with the bottom of internal filtrate filling region is provided with discharging opening；The delivery port of grade one filter 5
52 are connected with the water inlet 61 of secondary filter 6.
Grade one filter 5 (quartz filter) lower inside (can be porous plate or filter provided with drainage bottom plate 56
Net), laying quartz sand filter media layer on laying quartz sand thickness 57 (height=2~8mm), quartz sand thickness 57 on drainage bottom plate 56
(height=1.4~1.8m), the inner upper of grade one filter 5 is provided with flow-stopping plate 58.
Water inlet 61, exhaust outlet 65 and backwash discharge outlet 64 are provided with the top of the secondary filter 6 (Fig. 7), bottom is provided with
Delivery port 62 and backwash water inlet 63, the side wall corresponding with the top of internal filtrate filling region of secondary filter 6 are provided with
Charging aperture 66, the side wall corresponding with the bottom of internal filtrate filling region is provided with discharging opening 67；The water outlet of secondary filter 6
Mouth 62 is connected with the water inlet 71 of two grades of storage tanks 7.
Secondary filter 6 (SS filtering material filters) lower inside is provided with filter screen, filter screen and lays 1.2~1.5m successively
SS filtrates filtering layer, PP cotton composite screens, and SS filtrate filtering layers thickness control the 40~50% of secondary filter height；
The inner upper of secondary filter 6 is provided with flow-stopping plate.
Water inlet 71 is provided with the top of two grades of storage tanks 7 (clear water tanks), bottom is provided with sewage draining exit 74, and bottom is provided with water outlet
Correspond on mouth 72 and backwash delivery port 75, side wall at default spilling water water level and be provided with gap 73.Stored by two grades of storage tanks 7
Clean underground water after filtering, remains certain moisture storage capacity, in case recharge.
The backwashing pump 9 of the backwash unit is arranged on the backwash delivery port 75 and two grades of mistakes of two grades of storage tanks 7 of connection
On the pipeline of the backwash water inlet 71 of filter 6, the water processing control subelement (water processing control case 15) in control process unit
It is connected with backwashing pump 9, controls it to backwash secondary filter 6, grade one filter 5.
The inverted well 8 is several, is internally provided with the second immersible pump 13.Supercharging blowback is set to raise ground in inverted well 8
Lower water, recharge, Hui Yang alternately (such as Fig. 2).The recharge and blocking of subelement control underground water are controlled by recharge and flow
Hui Yang.The recharge and flow control subelement use the recharge of solar energy automatic start-stop and flow control cabinet 16, utilize its control
Water level in inverted well.Recharge groundwater level, and the water monitored by periphery are monitored by solar energy water level detection case 17 (Fig. 4)
Position automatically controls the recharge amount of recharge system.
The process chart of the foundation ditch water recharge system of the present embodiment is as shown in Fig. 2 as shown in Figure 2, technological process
Mainly include：Extract mine water → one-level storage tank (sedimentation basin) → aeration filling → one-level (quartz sand) filter → bis- grade
(SS filtrates) filter → bis- grade storage tank (clear water tanks) → recharge on demand.Specifically mainly include：Draw water and precipitate process, aeration
Process, filter progress, recharge and return raise process；
Draw water and precipitate process：By immersible pump groundwater abstraction, by three-way pipe, one end can directly be discharged, it is adaptable to
The situation of recharge is not needed；The other end by water examination it is qualified after can directly recharge；Otherwise one-level storage tank (precipitation is led to
Pond), filtration treatment is carried out after precipitation.In precipitation process, the ferromanganese ion in underground water in one-level storage tank is exposed to
After being aoxidized in air, the sediment such as generation ferric oxide, manganese dioxide.
It is aerated process：The air of 0.75~3.00MPa pressure is injected in being filled by air compressor machine to aeration, makes ferrous iron in water
Subsequent filter processing is carried out after manganese is fully oxidized.In Air Exposure, acted on by the oxygenation for being aerated filling+air compressor machine, promote ferrimanganic
Oxonium ion in ion and air chemically reacts, the sediment such as generation ferric oxide, manganese dioxide.
Filter progress：
Underground water after aeration initially enters grade one filter (quartz filter, preliminary filtering ground by coating steel pipe
Greater particle size impurity in lower water), quartz filter inlet valve and flowing water Valve are opened, while by water discharging valve and backwash
Valve is closed, water after filtering by flowing water Valve enter secondary filter (SS filtering material filters, by SS filtering material filters,
Iron and manganese oxides in removing underground water etc.), it is similar, SS filtering material filters inlet valve and flowing water Valve are opened, simultaneously will
Water discharging valve and back flush valves are closed.It is standby that underground water after two filter filterings enters two grades of storage tanks (clear water tanks)
With.
When the inlet and outlet pressure drop that water processing control subelement detects secondary filter diminishes, it is impossible to meet recharge requirement
When, open counter-flushing process, that is, close one-level, the inlet valve and flowing water Valve of secondary filter, while by water discharging valve and
Back flush valves are opened, using being backwashed in two grades of storage tanks (clear water tanks) through the qualified underground water of water examination, up to
Inlet and outlet pressure drop recovers normal.
Recharge and return raise process：Through the qualified underground water of water examination, using solar energy by monitoring groundwater level certainly
Dynamic start and stop recharge and the recharge of flow control cabinet control underground water and blocking Hui Yang, while setting many water pumps, are alternately returned
Fill and Hui Yang, interrupt recharge.
It was verified that the water quality of the recharge water after the foundation ditch water recharge system processing of the present embodiment obtains very big change
It is kind, after recharge Water Spreading the water quality of local ground watering will not be caused to degenerate and pollute.Meanwhile, using the foundation ditch underground of the present embodiment
Water Spreading system so that foundation ditch periphery groundwater level not continuous decrease during base pit dewatering, can keep constant water level, really
Surface subsidence will not be caused because of precipitation by protecting foundation ditch periphery.
Of particular note is that：The selection of filter filled media is fully to investigate existing filtering in the present embodiment
On the premise of device filled media, the scheme that determines after combined filtering effect and filtering cost are accounted for, particular content is as follows：
For groundwater recharge processing more medium filter (one-level, secondary filter), current filter tank body often uses glass
Glass steel, stainless steel and carbon steel lining anticorrosive coat are made, in filter peripheral hardware various necessary pipelines and valve etc., according to returning
The requirement of filling water, the filtrate used mainly has quartz sand filter media, manganese sand filtering material, and multiple filters can pass through each filtering
Device only loads a kind of filtrate, is connected by the way of series connection, can also be layered several filtrates of filling, be connected using parallel way.
The use of filter is run by some cycles, and each cycle is divided into filtering, backwash and just washes three steps；Backwash
Purpose is to remove the dirt accumulated in filtering layer, to recover the retaining power of filtering layer.Filter runs flow velocity about 8~10m/h, when
When it runs to current and does not reach permissible value by the pressure drop of filtering layer, stop filtering, start backwash.Now by filter
Water is discharged into the upper limb of filtering layer, is then fed into the air of certain pressure, after purging a few minutes, is continuing the situation of press-in air
Under, water reversely is sent into filter, its intensity should make filtering layer expand about 40%~50%, so as to reach the purpose of reverse blowdown.
Finally, positive water inlet is qualified to effluent quality, then starts filtering of resuming operation.
Based on above-mentioned principle, first, the present embodiment is investigated to SS filtrates；SS filtrates have good deferrization and demanganization with
Purifying water effect (filter quality is better than manganese sand filtering material), its dominant mechanism is the comprehensive function of flocculating setting and adsorption filtration.Due to
The main component of SS filtrates is silicon, iron, aluminium, and the molysite and aluminium salt that wherein iron, aluminium are formed after being dissolved in water are good flocculations
Various pollutants in iron, manganese and water are had flocculating setting effect by agent；SS filtrates are in vesicular texture, rough surface, hole
Rate is up to more than 50%, and specific surface area is larger, and surface can be high, has good physics to the various pollutants in iron, manganese and water
Cut-off filter and chemisorption.
SS filtrates and manganese sand filtering material performance comparision are as shown in table 1 below：
The SS filtrates of table 1 and manganese sand performance comparision
Table 2 below lists the relevant technical parameter using SS filtrates when designing deferrization and demanganization filter：
Table 2
The quantity of SS filtrates, such as table 3 below needed for the present embodiment has further investigated different-diameter filter：
Table 3
| Sequence number | |||||
| Tank diameter (mm) | Filtering layer volume (m3) | Filtrate weight (Kg) | Filtrate quantity (bag) | Thickness of filter bed (m) | |
| 1 | 400 | 0.14 | 125 | 5 | 1.1 |
| 2 | 600 | 0.31 | 250 | 10 | 1.1 |
| 3 | 800 | 0.6 | 500 | 20 | 1.2 |
| 4 | 1000 | 0.94 | 750 | 30 | 1.2 |
| 5 | 1200 | 1.41 | 1125 | 45 | 1.25 |
| 6 | 1400 | 1.92 | 1550 | 62 | 1.25 |
| 7 | 1600 | 2.5 | 2000 | 80 | 1.25 |
| 8 | 1800 | 3.18 | 2550 | 102 | 1.25 |
| 9 | 2000 | 4.06 | 3250 | 130 | 1.3 |
| 10 | 2200 | 4.94 | 3950 | 158 | 1.3 |
| 11 | 2400 | 5.9 | 4700 | 188 | 1.3 |
| 12 | 2600 | 6.9 | 5550 | 222 | 1.3 |
| 13 | 2800 | 8.0 | 6400 | 256 | 1.3 |
| 14 | 3000 | 9.2 | 7350 | 294 | 1.3 |
| 15 | 3200 | 10.5 | 8400 | 336 | 1.3 |
Accounted for reference to above-mentioned investigation result, filter effect and filtering cost, the present embodiment is finally determined：One-level mistake
Filter uses quartz filter, and secondary filter uses SS filtering material filters.On this basis, further in each filter layer
The optimal filling mode of filter medium investigated, high spot reviews SS filtrates, as a result show SS filtrates using must be fulfilled for
Lower condition：
1) deferrization and demanganization raw water must be aerated.Using SS filtrate removing of iron and manganese, it is necessary to which oxygenic aeration is aoxidized, and makes most of ferrimanganic
Ion becomes to be insoluble in the sediment of water, could be removed through SS media filtrations；Aeration unit is thus provided with systems.
2) enough thickness of filter bed are ensured.Experiment shows：Thickness of filter bed (being free of bed course) in filter should reach
1.2~1.5m, when particularly water quality is poor, the upper limit will be selected as far as possible.Thickness of filter bed not enough, penetrates readily through filter when load is excessive
Layer.
3) there are enough backwash spaces.Experiment is confirmed：SS filtrate unit weights are lighter, and the backwash that leave 40~50% is swollen
Swollen space, otherwise easily blocks upper water distribution filter, and filtrate is not washed clean yet.
4) will be to SS filtrate cleaning downs.SS filtrates are cellular particle, and dust is more.For the first time in use, must be thorough
Clean and can just come into operation in bottom.Rinsed, backwash and can be just washed repeatedly with raw water when washing material, until cleaning down is totally arranged
Untill water becomes clear.This is based on, backwash unit is set in system of the invention, accurately controlled using water processing control subelement
It is made to backwash secondary filter, grade one filter；Farthest safeguard the filter effect of SS filtering material filters.
5) three days will be 1 time to filtrate backwash.Every 3 days of SS filtrates must backwash 1 time, to ensure to be used for a long time.As not in time
Backwash will be hardened, influence purifying water effect and service life.The backwash process is same to be carried out accurately by water processing control subelement
Control.
Embodiment 2
The present embodiment is related to a kind of foundation ditch water recharge system, its system composition and process operations be the same as Example 1.Institute is not
It is with part, the present embodiment is selected differently from embodiment 1 to filter packing in one-level, secondary filter.The present embodiment is
Foundation ditch groundwater quality situation, filter effect and filtering cost are combined on the basis of embodiment 1, has determined following several
The selection scheme of filter packing：
Scheme one：
Grade one filter：Quartz sand filter media layer (thickness=1.8m) matches somebody with somebody quartz sand filter media (d=0.5~1.2mm, d using level
=1~2mm, volume ratio is 1:1.5) laid.
Secondary filter：Be the same as Example 1.
Scheme two：
Grade one filter：Be the same as Example 1.
Secondary filter：As shown in figure 8, on filter screen 611 from the bottom to top successively laying 1.2m SS filtrates filtering layer 612,
0.5m compound manganese sand filtering material (MnO2>=35%) filtering layer 613,0.4m quartzy sand filter blanket 614 and PP cottons composite screen 615.
Scheme three：
Grade one filter：Quartz sand filter media layer (thickness=1.6m) matches somebody with somebody quartz sand filter media (d=0.5~1.2mm, d using level
=1~2mm, volume ratio is 1:1) laid.
Secondary filter：The compound manganese sand filtration of laying 1.2m SS filtrates filtering layer 612,0.5m successively from the bottom to top on filter screen
Expect (MnO2>=35%) filtering layer 613,0.4m quartzy sand filter blanket 614 and PP cotton composite screens.
Further, by the way that to reference examples, (be the same as Example 1 the difference is that only：Only with grade one filter (compound manganese
Sand filtering material filter)), the filter effect of embodiment 1 and the present embodiment investigated, it is found that filter effect is from low to high：
Reference examples, embodiment 1, scheme one, scheme two, scheme three.Specifically, the filter effect religion reference examples of embodiment 1 are improved
20%, the filter effect of scheme one improves 8% compared with embodiment 1, and the filter effect of scheme two improves 12% compared with embodiment 1,
The filter effect of scheme three improves 25% compared with embodiment 1.As can be seen here, (SS filtrates are filtered for specific composite filter media combination
Layer, compound manganese sand filtering material (MnO2>=35%) filtering layer, quartz sand filter media layer) be remarkably improved filter effect；Match somebody with somebody with reference to level
The by-pass filtration of the quartz sand filter media layer of quartz sand filter media laying, its filter effect achieves highly significant raising, and recharge
The special ion or gas of well pipe corrosion can be made by being practically free of in water, while still kept on top in its cost, thus suitable for work
Industry popularization and application.
In order to farthest improve backwash effect, as a kind of optimal technical scheme of the scheme three of the present embodiment,
Drainage bottom plate in grade one filter uses porous plate, and porous plate is provided with spacing 60mm, the DN25 water filtering caps of quincuncial arrangement.
DN25 water filtering caps, spacing 60mm, quincuncial arrangement can be equally provided with filter screen below secondary filter.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (5)
1. a kind of foundation ditch water recharge system, including pumped well, recharge Water quality processing system and the inverted well being sequentially connected, its
It is characterised by, the recharge Water quality processing system includes backwash unit and the one-level storage tank being sequentially connected, aeration unit, one
Level filter, secondary filter, two grades of storage tanks, the backwash unit are connected with grade one filter, secondary filter respectively；
The foundation ditch water recharge system also include control process unit and respectively with pumped well, two grades of storage tanks and inverted well phase
Water level monitoring unit even, the control process unit includes draw water control subelement and the recharge water quality being connected with pumped well
The connected water processing control subelement of processing system and the recharge being connected with inverted well and flow control subelement；
The aeration unit includes aeration tank and for the air compressor machine to aeration tank oxygen supply, water inlet and one-level at the top of aeration tank
The delivery port of storage tank is connected by pipeline, and the delivery port of aeration pot bottom is connected with the water inlet of grade one filter；Aeration tank
Top be additionally provided with backwash discharge outlet, exhaust outlet, bottom is additionally provided with backwash water inlet, the backwash water inlet and backwash unit
It is connected；
From bottom to top provided with drainage bottom plate, quartz sand thickness and quartz sand filter media layer in the grade one filter；The quartz sand
The thickness of bed course is 2~8mm, and the thickness of the quartz sand filter media layer is 1.4~1.8m；The quartz sand filter media layer is matched somebody with somebody using level
Quartz sand filter media is laid, and particle diameter of the level with quartz sand filter media is respectively 0.5~1.2mm, 1~2mm；
Filter screen, SS filtrates filtering layer and PP cotton composite screens are provided with the secondary filter from bottom to top；The SS filtrates filtering layer
Thickness be 1.2~1.5m, and the thickness accounts for the 40~50% of secondary filter internal height；SS is filtered in the secondary filter
Expect between filtering layer and PP cotton composite screens, the compound manganese sand filtration bed of material, quartzy sand filter blanket more than SS filtrate filtering layers are equipped with successively；Institute
The thickness for stating the compound manganese sand filtration bed of material is 0.3~0.5m, and the thickness of the quartzy sand filter blanket is 0.2~0.4m.
2. foundation ditch water recharge system according to claim 1, it is characterised in that dived in the pumped well provided with first
Water pump, the first immersible pump pipeline water outlet is connected with one-level storage tank, two grades of storage tanks, external discharge-channels respectively through three-way pipe；
Magnetic valve is provided with the first immersible pump pipeline at three-way pipe, the magnetic valve is connected with the control subelement that draws water.
3. foundation ditch water recharge system according to claim 1, it is characterised in that the backwash unit includes recoil
Wash pump, the backwashing pump is arranged on the backwash delivery port of two grades of storage tanks and backwash water inlet, the one-level mistake of secondary filter
On the total pipeline that the backwash water inlet of filter is connected；The water processing control subelement is connected with backwashing pump, controls its right
Secondary filter, grade one filter are backwashed.
4. foundation ditch water recharge system according to claim 1, it is characterised in that the recharge and flow control are single
Member is using water level in the recharge of solar energy automatic start-stop and flow control cabinet control inverted well；The water level monitoring unit uses the sun
Can water level detecting case monitoring recharge groundwater level.
5. foundation ditch water recharge system according to claim 1, it is characterised in that the drainage bottom plate is using porous
Plate, the porous plate is provided with spacing 60mm, some DN25 water filtering caps of quincuncial arrangement.
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| CN201610132537.2A CN105625295B (en) | 2016-03-09 | 2016-03-09 | Foundation ditch water recharge system |
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| JP6698409B2 (en) * | 2016-04-04 | 2020-05-27 | 清水建設株式会社 | Groundwater treatment method |
| CN106245621B (en) * | 2016-07-27 | 2018-03-23 | 济南轨道交通集团有限公司 | A kind of electric osmose inverted well construction method |
| JP2018197472A (en) * | 2017-05-24 | 2018-12-13 | 清水建設株式会社 | Recharge method |
| CN107313436A (en) * | 2017-07-03 | 2017-11-03 | 中铁十四局集团有限公司 | Foundation ditch recharge water treatment facilities |
| CN108252294B (en) * | 2018-02-01 | 2019-12-13 | 中纬建设工程有限公司 | Foundation pit groundwater recharge system |
| CN109736770B (en) * | 2018-12-26 | 2021-07-20 | 核工业北京化工冶金研究院 | Backwashing filtering system and method for in-situ leaching uranium mining |
| CN111392988A (en) * | 2020-04-27 | 2020-07-10 | 北京市市政四建设工程有限责任公司 | Underground water treatment system and underground water treatment method |
| CN111423069A (en) * | 2020-04-27 | 2020-07-17 | 北京市市政四建设工程有限责任公司 | Groundwater pumping treatment recharge system and groundwater treatment method |
| CN112320929A (en) * | 2020-09-21 | 2021-02-05 | 江苏长三角环境科学技术研究院有限公司 | Method for treating foundation pit water by using MBR module according to water quality |
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| JP2005002659A (en) * | 2003-06-11 | 2005-01-06 | East Japan Railway Co | Groundwater circulation system in excavation of ground, and construction method for measure against groundwater in excavation of ground |
| CN102635122A (en) * | 2012-04-10 | 2012-08-15 | 上海广联建设发展有限公司 | Dewatering-recharging integrated device and process for foundation pit engineering |
| CN104724875A (en) * | 2013-12-24 | 2015-06-24 | 沈阳市天泉水处理设备有限责任公司 | Pressure type magnetization SS filtering material filtration iron removal and manganese removal device |
| CN104594327B (en) * | 2015-01-13 | 2016-06-15 | 济南轨道交通集团有限公司 | A kind of Ground Water Pumping during Excavation Bao Quan recharges integrated apparatus |
| CN105133570B (en) * | 2015-09-17 | 2017-03-29 | 济南轨道交通集团有限公司 | A kind of individual well single control takes out filling integral system and its control method |
| CN205444161U (en) * | 2016-03-09 | 2016-08-10 | 上海长凯岩土工程有限公司 | Foundation ditch groundwater recharge device |
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