CN105625295A - Foundation pit groundwater recharging system - Google Patents
Foundation pit groundwater recharging system Download PDFInfo
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- CN105625295A CN105625295A CN201610132537.2A CN201610132537A CN105625295A CN 105625295 A CN105625295 A CN 105625295A CN 201610132537 A CN201610132537 A CN 201610132537A CN 105625295 A CN105625295 A CN 105625295A
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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
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- 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 foundation pit groundwater recharging system. The foundation pit groundwater recharging system comprises a back wash unit, a water pumping well, a one-level water storage tank, an aeration unit, a one-level filter, a two-level filter, a two-level water storage tank and a recharge well. The water pumping well, the one-level water storage tank, the aeration unit, the one-level filter, the two-level filter, the two-level water storage tank and the recharge well are sequentially connected. The back wash unit is connected with the one-level filter and the two-level filter. The foundation pit groundwater recharging system further comprises a control treatment unit and a water level monitoring unit which is connected with the water pumping well, the two-level water storage tank and the recharge well. The control treatment unit comprises a water pumping control subunit connected with the water pumping well, a water treatment control subunit connected with a recharge water quality treatment system and a recharge and flow control subunit connected with the recharge well. According to the foundation pit groundwater recharging system, the effect that land subsidence surrounding a foundation pit due to rainfall is avoided can be ensured, and meanwhile, optimization of recharge water quality is further really achieved. After recharge of recharge water is finished, drop of the water level of regional groundwater, water quality reduction and pollution do not occur, blocking of the recharge well is also avoided, and the recharge effect is good.
Description
Technical field
The invention belongs to the base pit engineering technical field in municipal administration, building engineering field rock engineering, it relates to dewatering recharging technique field, it is specifically related to a kind of base hole water recharge system.
Background technology
The environmental problem relevant with base pit engineering mainly comprises: hole week land subsidence, hole week underground water decline, hole Zhou Tuti is displaced sideways in hole, the sedimentation of contiguous buildings or structures, inclination and crack, hole week comprehensive pipeline sedimentation and displacement etc. Excavation of foundation pit and dewatering are the major causes causing hole week environmental problem, around the horizontal displacement of the excavation of foundation pit degree of depth, foundation pit supporting construction and the Ji Keng that causes because of dewatering, ground water table reduces is the major influence factors causing the distortion of hole week, and distance base to cheat that 2 times of outer ground water table of excavation depth rangees reduce be the essential factor causing land subsidence. The hole Zhou Shuiwei that dewatering causes reduces and causes the water pressure transfer of soil mesoporosity, dissipates, and has not only broken the original mechanical balance of the soil body, and effective stress increases; And within the scope of cone of depression, hydraulic gradient increases, act on the seepage force on the soil body with volume power form and increase. The result of the two acting in conjunction is, sedimentation and deformation occurs hole Zhou Tuti. Therefore, in foundation pit construction process, effectively control hole week WATER LEVEL CHANGES is the key of the hole week land subsidence distortion that control causes because of precipitation.
For eliminating or reduce dewatering to the impact of surrounding environment, usually adopt the method that water-stop curtain is set, but the cost of water-stop curtain is higher, and difficulty of construction is relatively big, easily permeates. In view of the above-mentioned deficiency of water-stop curtain, groundwater recharge method is promoted gradually.
Implementing groundwater recharge is control the most direct means because of the hole Zhou Tuti groundwater level change caused by dewatering. But, artificial recharge underground water needs the water quality keeping a close eye on recharge water, in order to avoid making underground water be polluted because recharging. The water quality of recharge water must be better than the water quality of former underground water, reaches the standard of tap water; The water quality of region underground water can not be caused after recharging to become bad and pollute. Meanwhile, can't containing special ion or the gas that can make well pipe corrosion in recharge water. In addition, in use for some time, also the reason of the easy fine particle medium because of suspended substance, bubble, chemical precipitation, microorganism growth and waterbearing stratum itself, causes blocking of recharge well to existing groundwater recharge system, and effect is recharged in impact.
Summary of the invention
It is an object of the invention to overcome the deficiency of above-mentioned prior art existence, it is provided that a kind of base hole water recharge system. This base hole water recharge system makes base hole periphery groundwater level not continue decline during dewatering, it is possible to keep constant water level, it is ensured that base hole periphery can not cause land subsidence because of precipitation; The more important thing is the water quality really achieving and optimizing recharge water, recharge water can not cause the water quality of region underground water become bad and pollute after recharging, and not containing special ion or the gas that can make well pipe corrosion in recharge water, can not cause blocking of recharge well, recharge effect good.
It is an object of the invention to realizing by the following technical programs:
The present invention relates to a kind of base hole water recharge system, comprise pumped well connected successively, recharge Water quality processing system and recharge well, the described Water quality processing system that recharges comprises back flushing unit and the one-level water tank being connected successively, aeration unit, grade one filter, secondary filter, two grades of water tanks, and described back flushing unit is connected with grade one filter, secondary filter respectively; Described base hole water recharge system also comprise control treatment unit and respectively with pumped well, two grades of water tanks and recharge the water level monitoring unit that well is connected, described control treatment unit comprise drawing water of being connected with pumped well control subelement, with recharge water processing control subelement that Water quality processing system is connected and with monitoring holes, recharging and flow control subelement of recharging well and be connected.
Preferably, being provided with the first submersible pump in described pumped well, the first submersible pump pipeline water outlet, through Y-tube, is connected with one-level water tank, two grades of water tanks, external discharge passages respectively; Being provided with magnetic valve near Y-tube place on described first submersible pump pipeline, control subelement is connected this magnetic valve with drawing water.
Preferably, described aeration unit comprise aeration tank and for give aeration tank oxygen supply air compressor machine, the water-in at aeration tank top is connected by pipeline with the water outlet of one-level water tank, and the water outlet bottom aeration tank is connected with the water-in of grade one filter; The top of aeration tank is also provided with backwash water port, venting port, and bottom is also provided with backwash water-in, and described backwash water-in is connected with back flushing unit.
Preferably, described back flushing unit comprises backwashing pump, on the total pipeline that described backwashing pump is arranged on the backwash water-in of backwash water outlet with secondary filter of two grades of water tanks, the backwash water-in of grade one filter is connected; Described water processing control subelement is connected with backwashing pump, controls it and secondary filter, grade one filter are carried out back flushing.
Preferably, recharge described in and flow control subelement adopt sun power automatic start-stop recharge and flow control case control recharge water level in well; Described water level monitoring unit adopts the monitoring of sun power water level detecting case to recharge groundwater level, and the water level monitored by periphery controls the amount of recharging of recharge system automatically.
Preferably, the water-bed plate of filter, quartz sand thickness and quartz sand filter media layer it is provided with in described grade one filter from bottom to top; The thickness of described quartz sand thickness is 2��8mm, and the thickness of described quartz sand filter media layer is 1.4��1.8m.
Preferably, described quartz sand filter media layer adopts level to join quartz sand filter media and lays, and the particle diameter that described level joins quartz sand filter media is respectively 0.5��1.2mm, 1��2mm.
Preferably, the water-bed plate of described filter adopts porous plate, and this porous plate is provided with some DN25 water filtering caps of spacing 60mm, quincuncial arrangement.
Preferably, the cotton composite screen of filter screen, SS filtrate filtering layer and PP it is provided with in described secondary filter from bottom to top; The thickness of described SS filtrate filtering layer is 1.2��1.5m, and this thickness accounts for the 40��50% of secondary filter internal height.
Preferably, in described secondary filter between SS filtrate filtering layer and the cotton composite screen of PP, the compound manganese sand filtration bed of material, quartz sand filtering layer more than SS filtrate filtering layer it is equipped with successively; The thickness of the described compound manganese sand filtration bed of material is 0.3��0.5m, and the thickness of described quartz sand filtering layer is 0.2��0.4m.
Compared with prior art, the present invention has following useful effect:
1, base hole periphery groundwater level is made not continue decline during dewatering, it is possible to keep constant water level, it is ensured that base hole periphery can not cause land subsidence because of precipitation;
2, really achieving the water quality optimizing recharge water, recharge water can not cause the water quality of region underground water become bad and pollute after recharging;
3, almost not containing special ion or the gas that can make well pipe corrosion in recharge water;
4, level is joined the cascade filtration effect that single filter effect and particular filter media arrange and is all significantly improved, the fine particle in suspended substance in recharge water, bubble, chemical precipitation, microorganism growth and waterbearing stratum obtains maximum removal, significantly reduce blocking of recharge well phenomenon, greatly improve and recharge effect.
Accompanying drawing explanation
By reading with reference to the detailed description that non-limiting example is done by the following drawings, the other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the know-why route schematic diagram of base hole water recharge system;
Fig. 2 is the process flow sheet of base hole water recharge system;
Fig. 3 is the structural representation of base hole water recharge system;
Fig. 4 is the know-why 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 outward appearance structural representation of secondary filter;
Fig. 8 is the diagrammatic cross-section of secondary filter;
Wherein, 1, pumped well, 2, one-level water tank, 3, air compressor machine, 4, aeration tank, 5, grade one filter, 6, secondary filter, 7, two grades of water tanks, 8, recharge well, 9, backwashing pump, 10, first-class gauge, 11, second gauge, 12, first submersible pump, 13, 2nd submersible pump, 14, sun power automatic start-stop draws water case, and 15, water processing control case, 16, sun power automatic start-stop recharges and flow control case, and 17, sun power water level detecting case, 21, one-level water tank water-in, 22, one-level water tank water outlet, 23, one-level water tank spillway, 24, one-level water tank sewage draining exit, 41, aeration tank water-in, 42, aeration tank water outlet, 43, aeration tank backwash water-in, 44, aeration tank backwash water port, 45, aeration tank venting port, 46, aeration board, 51, grade one filter water-in, 52, grade one filter water outlet, 53, grade one filter backwash water-in, 54, grade one filter backwash water port, 55, grade one filter venting port, 56, the water-bed plate of filter, 57, quartz sand thickness, 58, flow-stopping plate, 61, secondary filter water-in, 62, secondary filter water outlet, 63, secondary filter backwash water-in, 64, secondary filter backwash water port, 65, secondary filter venting port, 66, secondary filter opening for feed, 67, secondary filter discharge port, 611, filter screen, 612, SS filter material layer, 613, the compound manganese sand filtration bed of material, 614, quartz sand filtering layer, 615, the cotton composite screen of PP, 71, two grades of water tank water-ins, 72, two grades of water tank water outlets, 73, spillway, 74, sewage draining exit, 75, two grades of water tank backwash water outlets.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail. The technician contributing to this area is understood the present invention by following examples further, but does not limit the present invention in any form. It should be appreciated that to those skilled in the art, without departing from the inventive concept of the premise, it is also possible to make certain adjustments and improvements. These all belong to protection scope of the present invention.
Pumped well water level as shown in Figure 1, is monitored by the know-why route of the base hole water recharge system of the present invention, as judged to recharge, then controls to establish submersible pump groundwater abstraction in pumped well, namely carries out Ji Keng and take out precipitation; The underground water extracted is carried out water examination, qualified words can directly carry out water purification and recharge, defective words enter settling tank and carry out sediment deposition, through aeration tank aerating oxidation, remove after impurity, iron manganese through the groundwater treatment system filtration treatment containing one-level, secondary filter, it is delivered to water purification storage tank, again carry out water examination, enter water purification after qualified to recharge, defective, again carry out settling tank, carry out successively precipitating, aeration, filtration treatment; Sun power automatic start-stop groundwater treatment and recharge Controlling System the Inlet and outlet water pressure drop of one-level, secondary filter is carried out Monitoring and Controlling, when pressure drop is too low start counter-flushing process, by water purification storage tank through the water outlet reverse pumping that water examination is qualified deliver to two grades, grade one filter carry out back flushing; The flow that above-mentioned water purification recharges specifically is recharged well water position monitor and forecast Systematical control, and controls to hocket to recharge and Hui Yang by it, does not make to recharge interruption.
Specifically, the base hole water recharge system of the present invention comprises following 11 systems:
1) manually differentiate: underground water is totally spent can not need process when reaching standard, directly enter 3 and recharge flow control. Water level in the interior observation well in sun power water table measure Systematical control hole is utilized to be in security interval.
2) precipitating: groundwater abstraction is stored in water tank (settling tank), the ferromanganese ion in underground water generates the throw out such as Indian red, Manganse Dioxide after exposing oxidation in atmosphere.
3) flow control: under meter is set between water tank (settling tank) and strainer, the water yield of control treatment; The water yield that under meter controls to recharge is set after water purification storage tank. The underground water shunting do not recharged.
4) aeration: by the oxygenation effect of aeration filling+air compressor machine, promotes the oxonium ion generation chemical reaction in ferromanganese ion and air, generates the throw out such as Indian red, Manganse Dioxide.
5) generally filter: by quartz sand filter media strainer etc., greater particle size impurity in preliminary filtering underground.
6) iron manganese filters: by SS filtering material filter etc., removes the iron and manganese oxides etc. in underground water.
7) Chu Shui: store the clean underground water after filtering by two grades of water tanks, remain and necessarily store up the water yield, in order to recharging.
8) back flushing: when strainer import and export pressure fall do not reach recharge require time, open back flushing.
9) recharge: the underground water that Ji Keng extracts can directly recharge after water examination is qualified, otherwise should be processed by Water quality processing system, and can recharge after water examination is qualified, utilizes sun power water table measure Systematical control to recharge water level in well.
10) Hui Yang: arrange supercharging blowback and raise and recharge underground water in well, recharge, Hui Yang hockets.
11) monitor: recharge groundwater level by the automatic monitoring means monitoring of sun power ground water table, and the water level monitored by periphery controls the amount of recharging of recharge system automatically.
The specific embodiment of base hole water recharge system is as follows:
Embodiment 1
The present embodiment relates to a kind of base hole water recharge system, its structural representation is as shown in Figure 3, comprise pumped well 1, one-level water tank 2, aeration unit, grade one filter 5, secondary filter 6, two grades of water tanks 7 of being connected successively and recharge well 8, also comprise back flushing unit, control treatment unit and water level monitoring unit; Described back flushing unit is connected with grade one filter 5, secondary filter 6 respectively; Described water level monitoring unit respectively with pumped well 1, two grades of water tanks 7 and recharge well 8 and be connected; Described control treatment unit comprise be connected with pumped well 1 the control subelement that draws water, with recharge water processing control subelement that Water quality processing system is connected and recharge and flow control subelement with what recharge that well 8 is connected. As a preferred embodiment of the present embodiment, water processing control subelement is also included on the pipeline of the water-in of the water outlet bottom the aeration tank 4 being connected aeration unit and grade one filter 5 the first-class gauge 10 arranged, and then realize the control of the water yield to process, the water outlet being included in secondary filter 6 with recharge on pipeline that well 8 is connected the second gauge 11 arranged, and then the water yield that realization control is recharged, and the underground water controlling not recharge is shunted.
In the present embodiment, described water level monitoring unit adopts sun power water level automatic monitoring to survey unit (sun power water level detecting case 17); Water level in the interior observation well in this sun power ground water table automatic monitoring measuring tank 17 control hole is utilized to be in security interval (Fig. 4).
It is provided with the first submersible pump 12 in described pumped well, pumps water through Y-tube, be connected with one-level water tank 2, two grades of water tanks 7, externally discharge passage respectively; Pump water under the control of control subelement (adopt in the present embodiment sun power automatic start-stop draw water controlling box 14) of drawing water, directly externally discharge not needing situation about recharging; Directly recharge after qualified by water examination; When water examination is defective, after one-level water tank 2 precipitation process, water outlet after aeration unit, grade one filter 5, secondary filter 6 filtration treatment, enters two grades of water tanks 7 successively, reaches and recharges after recharging water level requirement.
Described one-level water tank 2 top is provided with water-in 21, and sidewall is provided with water outlet 22, and another sidewall is provided with spillway 23 corresponding to presetting water water level place of overflowing, and bottom is provided with sewage draining exit 24.
Described aeration unit comprise aeration tank 4 (Fig. 5) and for give aeration tank 4 oxygen supply air compressor machine 3, the water-in 41 at aeration tank 4 top is connected by pipeline with the water outlet 22 of one-level water tank 2, water outlet 42 bottom aeration tank 4 is connected with the water-in 51 of grade one filter 5, the top of aeration tank 4 is also provided with backwash water port 44, venting port 45 (also can establish automatic purging valve), bottom be also provided with backwash water-in 43 (being connected with the backwashing pump of back flushing unit), it relates to pipeline employing galvanized steel pipe, screwed connection. The air that air compressor machine 3 provides to the aeration board 46 in aeration tank 4, realizes the oxygen supply aeration of underground water in tank through Cemented filling by the solarization air cap on aeration board 46.
Described grade one filter 5 (Fig. 6) top is provided with water-in 51, venting port 55 and backwash water port 54, bottom is provided with water outlet 52 and backwash water-in 53, grade one filter 5 sidewall corresponding with the top of inner filtrate filled band is provided with opening for feed, and the sidewall corresponding with the bottom of inner filtrate filled band is provided with discharge port; The water outlet 52 of grade one filter 5 is connected with the water-in 61 of secondary filter 6.
Described grade one filter 5 (quartz sand filtration device) lower inside is provided with the water-bed plate 56 (can be porous plate or filter screen) of filter, quartz sand thickness 57 (highly=2��8mm) laid by the water-bed plate 56 of filter, laying quartz sand filter media layer (highly=1.4��1.8m) on quartz sand thickness 57, grade one filter 5 inner upper is provided with flow-stopping plate 58.
Described secondary filter 6 (Fig. 7) top is provided with water-in 61, venting port 65 and backwash water port 64, bottom is provided with water outlet 62 and backwash water-in 63, secondary filter 6 sidewall corresponding with the top of inner filtrate filled band is provided with opening for feed 66, and the sidewall corresponding with the bottom of inner filtrate filled band is provided with discharge port 67; The water outlet 62 of secondary filter 6 is connected with the water-in 71 of two grades of water tanks 7.
Described secondary filter 6 (SS filtering material filter) lower inside is provided with filter screen, filter screen is laid SS filtrate filtering layer, the cotton composite screen of PP of 1.2��1.5m successively, and the gauge control of SS filtrate filtering layer is at the 40��50% of secondary filter height; Secondary filter 6 inner upper is provided with flow-stopping plate.
Described two grades of water tanks 7 (clear water tanks) top is provided with water-in 71, and bottom is provided with sewage draining exit 74, and bottom is provided with water outlet 72 and backwash water outlet 75, and sidewall is provided with spillway 73 corresponding to presetting water water level place of overflowing. Store the clean underground water after filtering by two grades of water tanks 7, remain and necessarily store up the water yield, in order to recharging.
The backwashing pump 9 of described back flushing unit is arranged on the backwash water outlet 75 being connected two grades of water tanks 7 with on the pipeline of the backwash water-in 71 of secondary filter 6, water processing control subelement (water processing control case 15) in control treatment unit is connected with backwashing pump 9, controls it and secondary filter 6, grade one filter 5 are carried out back flushing.
The described well 8 that recharges is for some, and its inside is provided with the 2nd submersible pump 13. Arrange supercharging blowback to raise and recharge underground water in well 8, recharge, Hui Yang hocket (such as Fig. 2). By recharging and flow control subelement control the recharging and block Hui Yang of underground water. Described recharge and flow control subelement adopt sun power automatic start-stop recharge and flow control case 16, utilize its control to recharge water level in well. Groundwater level is recharged, and the water level monitored by periphery controls the amount of recharging of recharge system automatically by sun power ground water table automatic monitoring measuring tank 17 (Fig. 4) monitoring.
The process flow sheet of the base hole water recharge system of the present embodiment is as shown in Figure 2, as shown in Figure 2, technical process mainly comprises: interior underground water �� one-level water tank (settling tank) �� aeration filling �� one-level (quartz sand) strainer �� bis-grade (SS filtrate) strainer �� bis-grade water tank (clear water tanks) in extraction hole �� recharge as required. Specifically mainly comprise: draw water and precipitate operation, aeration operation, filter progress, recharge and return raise operation;
Drawing water and precipitate operation: by submersible pump groundwater abstraction, through Y-tube, one end can directly be discharged, and is applicable to the situation not needing to recharge; Can directly recharge after the other end is qualified by water examination; Otherwise lead to one-level water tank (settling tank), after precipitation, carry out filtration treatment. In precipitation process, the ferromanganese ion in the underground water in one-level water tank generates the throw out such as Indian red, Manganse Dioxide after exposing oxidation in atmosphere.
Aeration operation: the air injecting 0.75��3.00MPa pressure by air compressor machine in being filled with to aeration, carries out follow-up filtration treatment after making ferrous iron manganese in water fully oxidized. In Air Exposure, by the oxygenation effect of aeration filling+air compressor machine, promote the oxonium ion generation chemical reaction in ferromanganese ion and air, generate the throw out such as Indian red, Manganse Dioxide.
Filter progress:
First underground water after aeration enter grade one filter (quartz sand filtration device by galvanized steel pipe, greater particle size impurity in preliminary filtering underground), open quartz sand filtration device inlet valve and flowing water Valve, water discharging valve and back flush valves are closed simultaneously, water after filtration enters secondary filter (SS filtering material filter by flowing water Valve, by SS filtering material filter, remove the iron and manganese oxides etc. in underground water), similar, open SS filtering material filter inlet valve and flowing water Valve, water discharging valve and back flush valves are closed simultaneously. It is for subsequent use that underground water after two strainers filter enters two grades of water tanks (clear water tanks).
Diminish when water processing control subelement detects that the inlet and outlet pressure of secondary filter falls, can not meet and recharge when requiring, open counter-flushing process, namely one-level, the inlet valve of secondary filter and flowing water Valve is closed, water discharging valve and back flush valves are opened simultaneously, utilize in two grades of water tanks (clear water tanks) and carry out back flushing through the underground water that water examination is qualified, until inlet and outlet pressure falls recovers normal.
Recharge and return and raise operation: through the underground water that water examination is qualified; sun power is utilized to be recharged by monitoring groundwater level automatic start-stop and flow control case control the recharging and block Hui Yang of underground water; multiple stage water pump is set simultaneously, hockets and recharge and Hui Yang, do not make to recharge interruption.
Facts have proved, the water quality of the recharge water after the base hole water recharge system process of the present embodiment is very significantly improved, and recharge water can not cause the water quality of region underground water become bad and pollute after recharging. Meanwhile, the base hole water recharge system of the present embodiment is adopted so that base hole periphery groundwater level does not continue decline during dewatering, it is possible to keep constant water level, it is ensured that base hole periphery can not cause land subsidence because of precipitation.
It needs to be noted: the selection of the present embodiment middle filtrator filled media is under the prerequisite fully having investigated existing strainer filled media, the scheme that combined filtering effect and filtration cost are determined after considering, particular content is as follows:
More medium filter (one-level, secondary filter) is processed for groundwater recharge, current filter canister body commonly use glass reinforced plastic, stainless steel and carbon steel add lining preservative coat be made, at the pipeline and valve etc. of the various necessity of strainer peripheral hardware, according to recharging with the requirement of water, the filtrate used mainly contains quartz sand filter media, manganese sand filtering material, and multiple strainer can only load a kind of filtrate by each strainer, the mode of series connection is adopted to connect, also layering can load several filtrate, adopt parallel way to connect.
The use of strainer is pressed some cycles and is run, and each cycle is divided into filtration, backwash and is just washing three steps; The object of backwash removes the dirt of accumulation in filtering layer, to recover the retaining power of filtering layer. Strainer runs flow velocity about 8��10m/h, when it run to current fallen by the pressure of filtering layer do not reach permissible value time, stop filtering, start backwash. The upper edge that water in strainer is now discharged into filtering layer, then sends into the air of certain pressure, blows after washing several minutes, when continuing press-in air, oppositely sending water in strainer, its intensity should make filtering layer expand about 40%��50%, thus reaches the object of reverse blowdown. Finally, just qualified to effluent quality to water inlet, then start to resume operation filtration.
Based on above-mentioned principle, first, SS filtrate is investigated by the present embodiment; SS filtrate has good deferrization and demanganization and purifying water effect (filter quality is better than manganese sand filtering material), and its dominant mechanism is the comprehensive action of flocculating settling and adsorption filtration. Owing to the main component of SS filtrate is silicon, iron, aluminium, the molysite that Qi Zhongtie, aluminium are formed after dissolving in water and aluminium salt are good flocculation agents, and the various pollutents in iron, manganese and water are had flocculating settling effect; SS filtrate is cell texture, surface irregularity, and porosity is up to more than 50%, and specific surface area is relatively big, and the various pollutents in iron, manganese and water are had good physics cut-off filter and chemisorption by surface energy height.
SS filtrate and manganese sand filtering material Performance comparision are as shown in table 1 below:
Table 1SS filtrate and manganese sand Performance comparision
The relevant technical parameter of application SS filtrate when following table 2 lists design deferrization and demanganization strainer:
Table 2
The present embodiment has investigated the quantity of SS filtrate needed for different diameter strainer further, such as following table 3:
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 --> |
| 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 |
Considering in conjunction with above-mentioned investigation result, filter effect and filtration cost, the present embodiment is finally determined: grade one filter adopts quartz sand filtration device, and secondary filter adopts SS filtering material filter. On this basis, being investigated by the best filling mode of the filtration medium in each filtering layer further, emphasis investigates SS filtrate, and result shows that SS filtrate uses and must meet the following conditions:
1) the former water of deferrization and demanganization must aeration. Adopt SS filtrate removing of iron and manganese, it is necessary to oxygenic aeration is oxidized, make major part ferromanganese ion become the throw out being insoluble in water, could remove through SS media filtration; Thus aeration unit it is provided with in systems in which.
2) enough thickness of filter bed are ensured. Test shows: the thickness of filter bed (not containing bed course) in strainer should reach 1.2��1.5m, when particularly water quality is poor, will select the upper limit as far as possible. Thickness of filter bed is inadequate, easily penetrates filtering layer when load is excessive.
3) there are enough back flushing spaces. Test confirms: SS filtrate unit weight is relatively light, will leave the backwash expansion space of 40��50%, otherwise easily blocks upper cloth water filter, and filtrate does not wash clean yet.
4) will to SS filtrate cleaning down. SS filtrate is vesicular particle, and dust is more. When using for the first time, must thoroughly clean and just can come into operation. Rinse with former water when washing material, it is possible to backwash and just washing repeatedly, until the clean draining of cleaning down become clear till. Just based on this, the system of the present invention arranges back flushing unit, adopt water processing control subelement accurately to control it and secondary filter, grade one filter are carried out back flushing; Safeguard to maximum degree the filter effect of SS filtering material filter.
5) three days will to filtrate backwash 1 time. SS filtrate necessary backwash in every 3 days 1 time, to ensure life-time service. As backwash will be hardened not in time, affect purifying water effect and work-ing life. This backwash operation is accurately controlled by water processing control subelement equally.
Embodiment 2
The present embodiment relates to a kind of base hole water recharge system, and its system composition and process operations are with embodiment 1. Institute's difference is, the selection of filter packing in one-level, secondary filter is different from embodiment 1 by the present embodiment. The present embodiment is cheated groundwater quality situation, filter effect in conjunction with base on the basis of embodiment 1 and filters cost, has determined the selection scheme of following several filter packing:
Scheme one:
Grade one filter: quartz sand filter media layer (thickness=1.8m) adopts level to join quartz sand filter media (d=0.5��1.2mm, d=1��2mm, volume ratio is 1:1.5) and lays.
Secondary filter: with embodiment 1.
Scheme two:
Grade one filter: with embodiment 1.
Secondary filter: as shown in Figure 8, filter screen 611 is laid the SS filtrate filtering layer 612 of 1.2m, the compound manganese sand filtering material (MnO of 0.5m from the bottom to top successively2>=35%) the quartz sand filtering layer 614 of filtering layer 613,0.4m and the cotton composite screen 615 of PP.
Scheme three:
Grade one filter: quartz sand filter media layer (thickness=1.6m) adopts level to join quartz sand filter media (d=0.5��1.2mm, d=1��2mm, volume ratio is 1:1) and lays.
Secondary filter: lay the SS filtrate filtering layer 612 of 1.2m, the compound manganese sand filtering material (MnO of 0.5m on filter screen from the bottom to top successively2>=35%) the quartz sand filtering layer 614 of filtering layer 613,0.4m and the cotton composite screen of PP.
Further, by the filter effect of reference examples (being only with the difference of embodiment 1: only adopt grade one filter (compound manganese sand filtering material strainer)), embodiment 1 and the present embodiment is investigated, it has been found that filter effect is from low to high: reference examples, embodiment 1, scheme one, scheme two, scheme three. Specifically, the filter effect of embodiment 1 religion reference examples improves 20%, the filter effect of scheme one relatively embodiment 1 improve 8%, the filter effect of scheme two relatively embodiment 1 improve 12%, the filter effect of scheme three relatively embodiment 1 improve 25%. It thus is seen that specific composite filter media combination (SS filtrate filtering layer, compound manganese sand filtering material (MnO2>=35%) filtering layer, quartz sand filter media layer) filter effect can be significantly improved; In conjunction with the single filter of quartz sand filter media layer there is level joining quartz sand filter media and laying, its filter effect achieves and improves extremely significantly, and almost not containing special ion or the gas that can make well pipe corrosion in recharge water, its cost is still kept on top simultaneously, be thus applicable to industry and apply.
In order to farthest improve backwash effect, as a kind of optimal technical scheme of the scheme three of the present embodiment, the water-bed plate of the filter in grade one filter adopts porous plate, and porous plate is provided with the DN25 water filtering cap of spacing 60mm, quincuncial arrangement. Filter screen below secondary filter can be provided with DN25 water filtering cap, spacing 60mm, quincuncial arrangement equally.
Above specific embodiments of the invention are described. It is understood that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect the flesh and blood of the present invention.
Claims (10)
1. a base hole water recharge system, comprise pumped well connected successively, recharge Water quality processing system and recharge well, it is characterized in that, the described Water quality processing system that recharges comprises back flushing unit and the one-level water tank being connected successively, aeration unit, grade one filter, secondary filter, two grades of water tanks, and described back flushing unit is connected with grade one filter, secondary filter respectively; Described base hole water recharge system also comprise control treatment unit and respectively with pumped well, two grades of water tanks and recharge the water level monitoring unit that well is connected, described control treatment unit comprise drawing water of being connected with pumped well control subelement, with recharge water processing control subelement that Water quality processing system is connected and recharge and flow control subelement with what recharge that well is connected.
2. base according to claim 1 hole water recharge system, it is characterised in that, it is provided with the first submersible pump in described pumped well, the first submersible pump pipeline water outlet, through Y-tube, is connected with one-level water tank, two grades of water tanks, external discharge passages respectively; Being provided with magnetic valve near Y-tube place on described first submersible pump pipeline, control subelement is connected this magnetic valve with drawing water.
3. base according to claim 1 hole water recharge system, it is characterized in that, described aeration unit comprise aeration tank and for give aeration tank oxygen supply air compressor machine, the water-in at aeration tank top is connected by pipeline with the water outlet of one-level water tank, and the water outlet bottom aeration tank is connected with the water-in of grade one filter; The top of aeration tank is also provided with backwash water port, venting port, and bottom is also provided with backwash water-in, and described backwash water-in is connected with back flushing unit.
4. base according to claim 1 hole water recharge system, it is characterized in that, described back flushing unit comprises backwashing pump, on the total pipeline that described backwashing pump is arranged on the backwash water-in of backwash water outlet with secondary filter of two grades of water tanks, the backwash water-in of grade one filter is connected; Described water processing control subelement is connected with backwashing pump, controls it and secondary filter, grade one filter are carried out back flushing.
5. base according to claim 1 hole water recharge system, it is characterised in that, described in recharge and flow control subelement adopt sun power automatic start-stop recharge and flow control case control recharge water level in well; Described water level monitoring unit adopts the monitoring of sun power water level detecting case to recharge groundwater level, and the water level monitored by periphery controls the amount of recharging of recharge system automatically.
6. base according to claim 1 hole water recharge system, it is characterised in that, it is provided with the water-bed plate of filter, quartz sand thickness and quartz sand filter media layer in described grade one filter from bottom to top; The thickness of described quartz sand thickness is 2��8mm, and the thickness of described quartz sand filter media layer is 0.2��1.8m.
7. base according to claim 6 hole water recharge system, it is characterised in that, described quartz sand filter media layer adopts level to join quartz sand filter media and lays, and the particle diameter that described level joins quartz sand filter media is respectively 0.5��1.2mm, 1��2mm.
8. base hole water recharge system according to claim 6 or 7, it is characterised in that, the water-bed plate employing porous plate of described filter, this porous plate is provided with some DN25 water filtering caps of spacing 60mm, quincuncial arrangement.
9. base according to claim 1 hole water recharge system, it is characterised in that, it is provided with the cotton composite screen of filter screen, SS filtrate filtering layer and PP in described secondary filter from bottom to top; The thickness of described SS filtrate filtering layer is 1.2��1.5m, and this thickness accounts for the 40��50% of secondary filter internal height.
10. base according to claim 9 hole water recharge system, it is characterised in that, in described secondary filter between SS filtrate filtering layer and the cotton composite screen of PP, more than SS filtrate filtering layer it is equipped with the compound manganese sand filtration bed of material, quartz sand filtering layer successively; The thickness of the described compound manganese sand filtration bed of material is 0.2��0.5m, and the thickness of described quartz sand filtering layer is 0.2��0.5m.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106245621A (en) * | 2016-07-27 | 2016-12-21 | 济南轨道交通集团有限公司 | A kind of electric osmose inverted well construction method |
| JP2017186770A (en) * | 2016-04-04 | 2017-10-12 | 清水建設株式会社 | Groundwater processing 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 |
| CN108252294A (en) * | 2018-02-01 | 2018-07-06 | 中纬建设工程有限公司 | Foundation pit water recharge system |
| JP2018197472A (en) * | 2017-05-24 | 2018-12-13 | 清水建設株式会社 | Recharge method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104594327A (en) * | 2015-01-13 | 2015-05-06 | 济南轨道交通集团有限公司 | Water settling, spring protection and recharging integrated device 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 |
| CN105133570A (en) * | 2015-09-17 | 2015-12-09 | 济南轨道交通集团有限公司 | Single-well single-control pumping and injection integrated system and control method thereof |
| 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 |
-
2016
- 2016-03-09 CN CN201610132537.2A patent/CN105625295B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104594327A (en) * | 2015-01-13 | 2015-05-06 | 济南轨道交通集团有限公司 | Water settling, spring protection and recharging integrated device for foundation pit engineering |
| CN105133570A (en) * | 2015-09-17 | 2015-12-09 | 济南轨道交通集团有限公司 | Single-well single-control pumping and injection integrated system and control method thereof |
| 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 |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017186770A (en) * | 2016-04-04 | 2017-10-12 | 清水建設株式会社 | Groundwater processing method |
| CN106245621A (en) * | 2016-07-27 | 2016-12-21 | 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 |
| CN108252294A (en) * | 2018-02-01 | 2018-07-06 | 中纬建设工程有限公司 | Foundation pit water recharge system |
| CN108252294B (en) * | 2018-02-01 | 2019-12-13 | 中纬建设工程有限公司 | Foundation pit groundwater recharge system |
| CN109736770A (en) * | 2018-12-26 | 2019-05-10 | 核工业北京化工冶金研究院 | A kind of ground-dipping uranium extraction can back-flushing filtering system and method |
| 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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