CN103924652B - A kind of window type catch pit and construction method thereof - Google Patents
A kind of window type catch pit and construction method thereof Download PDFInfo
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- CN103924652B CN103924652B CN201410152657.XA CN201410152657A CN103924652B CN 103924652 B CN103924652 B CN 103924652B CN 201410152657 A CN201410152657 A CN 201410152657A CN 103924652 B CN103924652 B CN 103924652B
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Abstract
The invention discloses a kind of window type catch pit and construction method thereof, comprise pit shaft and well seat, pit shaft is provided with the borehole wall, and the borehole wall is provided with draining window, and the inwall of draining window is truncated cone-shaped, draining window is provided with reduced pipe, the outer wall of reduced pipe and the inwall of draining window suitable, the inner chamber of reduced pipe is provided with cage, and the inwall of cage and reduced pipe is suitable, be filled with filter in cage, the outside of reduced pipe is provided with the 1st flange; 1st flange is connected with the 2nd flange, and the 2nd flange is connected with collection and oozes device; Or the 1st flange be fixed with blind flange dish.Construction method comprises excavation well seat basis; Well seat makes; Pit shaft makes; In reduced pipe, put cage, filter, the coarse sand bag of geotextiles parcel and the gravel bag of geotextiles parcel, the 1st flange connects the 2nd flange or blind flange dish.The present invention both can be used to shutoff window, also can be transformed into collection seepage well, used flexibly, reached dual-use material, reduce investment outlay.
Description
Technical field
The present invention relates to a kind of catch pit, particularly relate to the window type catch pit that tailings storage backwater tapered or that catchment area is less Tailings Dam drains off floodwaters.
Background technology
Catch pit is one of important structure of mill tailings facility, drop to sleet water in Tailings Dam catchment area and tailing clearing rinsing mostly by it, discharge outside storehouse through the structure such as drainage culvert or tunnel subsequently, with guarantee tailing dam unlikely by flood unrestrained push up and make tailing clearing rinsing return to ore dressing plant reuse.When the drainage structures discharge capacity needed for Tailings Dam is less, general employing window type catch pit.Window type catch pit system one-stage completion, in borehole wall different level, place leaves draining window, and this well tools has the advantages such as structural integrity is good, and hole diameter is little, and working service is easy, but bleeder quantity is little.
Window type catch pit well bore is made by steel concrete, and comprise pit shaft and well seat, pit shaft is positioned at the top of well seat, pit shaft is provided with the borehole wall, the borehole wall is provided with draining window, and the inwall of draining window is truncated cone-shaped, and namely outside diameter is large, inside diameter is little, existing draining window shutoff uses concrete stopper, concrete stopper heavy 52kg (outer diameter φ 300mm, the inner diameter phi 350mm of each shutoff, long 250mm), see Fig. 1, Fig. 2 and Fig. 3.At draining window, the concrete plug period of the day from 11 p.m. to 1 a.m being installed, need by concrete stopper from moving to ship, then being installed on the draining window of catch pit from ship on the bank, carrying effort, and not easily stifled tight, easily leak ore pulp.When concrete stopper construction deviation is larger, may not install, and sealing is poor.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of window type catch pit, and this window type catch pit both can be used to drain off floodwaters, and adopts flange shutoff window, shutoff good sealing effect; Also catch pit can be transformed into collection seepage well, collection oozes effective.
Technical scheme to be solved by this invention is: a kind of window type catch pit, comprise pit shaft and well seat, pit shaft is positioned at the top of well seat, pit shaft is provided with the borehole wall, the borehole wall is provided with draining window, the inwall of draining window is truncated cone-shaped, and draining window is provided with reduced pipe, the outer wall of reduced pipe and the inwall of draining window suitable; The inner chamber of reduced pipe is provided with cage, and the inwall of cage and reduced pipe is suitable, is filled with filter in cage, and the outside of reduced pipe is provided with the 1st flange; The outside of described cage is provided with outer anti-limit, and outer anti-limit contacts with the lateral surface of the 1st flange; Described filter comprises filter, the gravel bag of geotextiles parcel and the coarse sand bag of geotextiles parcel, coarse sand bag is positioned at the outside of gravel bag, filter is positioned at the inner side of gravel bag, coarse sand particle diameter in coarse sand bag is 1 ~ 20mm, grain size of gravel in gravel bag is 20 ~ 60mm, and filter is provided with treatment hole.
As improvement, above-mentioned 1st flange has been bolted the 2nd flange, and the 2nd flange is provided with filter bores, and the 2nd flange is connected with collection and oozes device.
Above-mentioned collection oozes device as plastic blind-ditch, or flexible porous tube, or geotechnological straw mats.
As improvement, the exposed surface of above-mentioned reduced pipe, the 1st flange and the 2nd flange is coated with geotextiles.
As improvement, above-mentioned 3rd flange is positioned at the inner side of reduced pipe.
Above-mentioned 1st flange has been bolted blind flange dish.
The construction method of the 1st kind of window type catch pit:
(1) well seat basis is excavated: well seat buried depth is not less than 2/3 of well seat height, and bearing capacity of foundation soil is not less than 200kPa;
(2) well seat makes: formwork supporting plate, puts reinforcing bar, pouring concrete, maintenance;
(3) pit shaft makes: formwork supporting plate, puts reinforcing bar, and reserved draining window, at the surfaces externally and internally brush anti-corrosion material of reduced pipe, then lays reduced pipe at draining window, pouring concrete, also maintenance together with reduced pipe is cast in pit shaft;
(4) in reduced pipe, put cage, filter plate is let slip in the inboard of cage, and the aperture of filter does not spill with gravel is advisable, in reduced pipe, be then packed into the gravel bag of geotextiles parcel and the coarse sand bag of geotextiles parcel successively; 1st flange has been bolted the 2nd flange.Then be coated with geotextiles at the exposed surface of described reduced pipe, the 1st flange and the 2nd flange, tighten with binding strip, the 2nd flange is connected with collection and oozes device.
The construction method of the 2nd kind of window type catch pit, the steps include:
(1) well seat basis is excavated: well seat buried depth is not less than 2/3 of well seat height, and bearing capacity of foundation soil is not less than 200kPa;
(2) well seat makes: formwork supporting plate, puts reinforcing bar, pouring concrete, maintenance;
(3) pit shaft makes: formwork supporting plate, puts reinforcing bar, and reserved draining window, at the surfaces externally and internally brush anti-corrosion material of reduced pipe, then lays reduced pipe at draining window, pouring concrete, also maintenance together with reduced pipe is cast in pit shaft;
(4) in reduced pipe, cage is put, filter plate is let slip in the inboard of cage, the aperture of filter does not spill with gravel is advisable, then in reduced pipe, be packed into the gravel bag of geotextiles parcel and the coarse sand bag of geotextiles parcel successively, 1st flange has been bolted blind flange dish, before installation, outside brush anti-corrosion material in blind flange dish.
Technique effect of the present invention is: the draining window of a kind of window type catch pit of the present invention is provided with reduced pipe, and the inner chamber of reduced pipe is provided with cage, is filled with filter in cage, and the outside of reduced pipe is provided with the 1st flange.When the 1st flange is subject to outside lateral pressure effect, reduced pipe outer wall and draining window contact internal walls are more tight, and reduced pipe is combined more firm with draining window.Cage content Nano Filtration device, for filtering native draining, can filter out the sand in water, prevents " running mixed ", oozing, reducing the phreatic line in tailing dam when also can be used for row after window shutoff.The outside of cage is provided with outer anti-limit, and outer anti-limit contacts with the lateral surface of the 1st flange, is convenient to cage to be fixed in reduced pipe.Filter comprises filter, the coarse sand bag of geotextiles parcel and the gravel bag of geotextiles parcel, and good filtration effect, cost is low.Be coated with geotextiles at the exposed surface of reduced pipe, the 1st flange and the 2nd flange, increase filter effect further.The inner side of reduced pipe is provided with the 3rd flange, is used for fixing reduced pipe further.Flange connects, and mounting or dismounting are convenient.1st flange both can connect blind flange dish, was used for shutoff draining window; 1st flange also can connect the 2nd flange, and the 2nd flange is connected with collection and oozes device, is used by catch pit, accelerate tailings discharging consolidation in storehouse as collection seepage well.Therefore, the present invention uses flexibly, reaches dual-use material, reduces investment outlay.Because reduced pipe and flange are the finished product of produce in factory, the sealing of shutoff will be much better than concrete stopper, installs and is also easier to.The roughness coefficient (n=0.011) of steel pipe is less than the roughness coefficient (n=0.014 ~ 0.017) of concrete face, for the discharge capacity of single window, the discharge capacity with the draining window of the present invention of diameter is greater than existing concrete draining window.Concrete stopper shutoff changes into and adopts blind flange and bolt by the present invention, and weight is about 0.2 ~ 0.5 times of the concrete stopper weight of same diameter window, and component weight is light, more convenient operation.
Accompanying drawing explanation
1, Fig. 1 is window type catch pit structural representation.
2, Fig. 2 is existing window type catch pit draining window partial sectional view.
3, Fig. 3 is existing window type catch pit concrete stopper sectional view.
4, Fig. 4 is window type catch pit embodiment 1 structural representation of the present invention.
5, Fig. 5 is window type catch pit embodiment 1 reduced pipe of the present invention and the 1st flange connection diagram.
6, Fig. 6 is window type catch pit cage front view of the present invention.
7, Fig. 7 is window type catch pit cage right view of the present invention.
8, Fig. 8 is window type catch pit filter front view of the present invention.
9, Fig. 9 is window type catch pit filter right view of the present invention.
10, Figure 10 is the coarse sand bag of window type catch pit geotextiles of the present invention parcel and the gravel package location view of geotextiles parcel.
11, Figure 11 is window type catch pit the 2nd flange front view of the present invention.
12, Figure 12 is window type catch pit the 2nd flange right view of the present invention.
13, Figure 13 is window type catch pit embodiment 2 structural representation of the present invention.
In figure: 1, the borehole wall, 2, reduced pipe, 3, cage, the 4, the 3rd flange, 5, gravel bag, 6, coarse sand bag, 7, filter, the 8, the 1st flange, 9, the 2nd flange, 10, bolt, 11, geotextiles, 12, collection oozes device, 13, binding strip, 14, concrete stopper, 15, treatment hole, 16, filter bores, 17, bolt hole, 18, draining window, 19, lateral surface, 20, outer anti-limit, 21, blind flange dish.
Detailed description of the invention
Embodiment 1
Embodiment 1 is as shown in Fig. 4 to Figure 12, embodiment 1 window type catch pit uses as collection seepage well, comprise pit shaft and well seat, pit shaft is positioned at the top of well seat, pit shaft is provided with the borehole wall 1, and the borehole wall 1 is provided with draining window 18, and the inwall of draining window 18 is truncated cone-shaped, this truncated cone-shaped inner wall diameter is little, and outside diameter is large.Draining window 18 is provided with reduced pipe 2, the outer wall of reduced pipe 2 and the inwall of draining window 18 suitable; The inner chamber of reduced pipe 2 is provided with cage 3, and the present embodiment cage 3 adopts iron cage, and cage 3 is suitable with the inwall of reduced pipe 2, and be filled with filter in cage 3, the outside (right-hand member of the present embodiment) of reduced pipe 2 is provided with the 1st flange 8.The outside (right-hand member of the present embodiment cage 3) of cage 3 is provided with outer anti-limit 20, and outer anti-limit 20 contacts with the lateral surface 19 of the 1st flange 8.Described filter comprises filter 7, the coarse sand bag 6 of geotextiles parcel and the gravel bag 5 of geotextiles parcel, grain size of gravel in gravel bag 5 is 20 ~ 60mm, coarse sand bag 6 is positioned at the outside (the present embodiment coarse sand bag 6 is positioned at the right-hand member of gravel bag 5) of gravel bag 5, coarse sand particle diameter in coarse sand bag is 1 ~ 20mm, the inner side (left end of the present embodiment gravel bag 5) of gravel bag 5 is filter 7, filter 7 is provided with treatment hole 15, and the present embodiment filter 7 adopts punched steel plate.Described 1st flange 8 is connected with the 2nd flange the 9,2nd flange 9 by bolt 10 and is provided with filter bores 16, and the 2nd flange 9 is connected with collection and oozes device 12.Described collection oozes device as plastic blind-ditch, or flexible porous tube, or geotechnological straw mats.The exposed surface of described reduced pipe 2, the 1st flange 8 and the 2nd flange 9 is coated with geotextiles 11 by binding strip 13.The inner side (left end of the present embodiment reduced pipe 2) of described reduced pipe 2 is provided with the 3rd flange 4.It is used as collection seepage well by catch pit that collection oozes device, accelerates tailings discharging consolidation in storehouse.Geotextiles, also known as geotextile, it is by the water permeability geosynthetics of synthetic fibers by acupuncture or braiding.Plastic blind-ditch is by plastic core external parcel filter cloth group formula, plastics core body take thermoplastic synthetic resin as primary raw material, through modification, under hot melt state, thin plastic strip is squeezed out by nozzle, again by plastic wire welding on node that shaped device will be extruded, form 3 D stereo net structure.Flexible porous tube is the tubing that one has down saturating (row) water effect of filter, and row, infiltration effect by force, utilize " capillary " phenomenon and " siphon " principle, integrate water suction, permeable, draining, have withstand voltage, permeable and reverse filter effect.Geotechnique's straw mats are a kind of with the geosynthetics of sleave melting lapping, it is withstand voltage height, and perforate density is large, have comprehensively to catchment, horizontal drainage function.Composition structure is a three-dimensional geotechnological web-roll core, and two sides is all furnished with acupuncture perforation nonweaven geotextile.Three-dimensional geotechnological web-roll core promptly can discharge underground water, and self also have a hole maintenance system, can block capillary water under high loads, meanwhile, it can also play isolation reinforcement effect.
Window type catch pit of the present invention and existing window type catch pit make similar, and well seat, pit shaft adopt reinforced concrete cast-in-situ structure.Reduced pipe, flange adopt customization or buy finished product, and cage makes according to size, is advisable can just put into reduced pipe.Construction and the use step of the embodiment of the present invention 1 catch pit are as follows:
(1) well seat basis is excavated: be excavated to projected depth, well seat buried depth is generally not less than 2/3 of well seat height, and bearing capacity of foundation soil is generally not less than 200kPa.
(2) well seat makes: formwork supporting plate, puts reinforcing bar, pouring concrete, maintenance.
(3) pit shaft makes: formwork supporting plate, puts reinforcing bar, pouring concrete, maintenance.Wherein respectively lay a reduced pipe at original the window's position place, and together with being cast in pit shaft.For preventing the corrosion of reduced pipe, must within it wall and Brush for outer wall anti-corrosion material.
(4) first in reduced pipe, put cage, filter plate is let slip in the inboard of cage, and the aperture of filter does not spill with gravel is advisable, in reduced pipe, be then packed into the gravel bag of geotextiles parcel and the coarse sand bag of geotextiles parcel successively.1st flange has been bolted the 2nd flange.Then be coated with geotextiles at the exposed surface of described reduced pipe, the 1st flange and the 2nd flange, tighten with cloth or iron wire.2nd flange is connected with collection and oozes device, as plastic blind-ditch, flexible porous tube, geotechnological straw mats etc.
Embodiment 2
As shown in figure 13, the 1st flange 8 of embodiment 2 one kinds of window type catch pits is bolted blind flange dish 21 to embodiment 2.Blind flange dish 21 is flat flange, does not have limbers, and blind flange dish is used for shutoff draining window.Other structure of embodiment 2 is with embodiment 1.
Construction and the use step of the embodiment of the present invention 2 window type catch pit are as follows:
(1) well seat basis is excavated: be excavated to projected depth, well seat buried depth is generally not less than 2/3 of well seat height, and bearing capacity of foundation soil is generally not less than 200kPa.
(2) well seat makes: formwork supporting plate, puts reinforcing bar, pouring concrete, maintenance.
(3) pit shaft makes: formwork supporting plate, puts reinforcing bar, pouring concrete, maintenance, wherein lays a reduced pipe at original draining the window's position place, and together with being cast in pit shaft, for preventing the corrosion of reduced pipe, and must within it wall and Brush for outer wall anti-corrosion material.
(4) in reduced pipe, cage is put, filter plate is let slip in the inboard of cage, the aperture of filter does not spill with gravel is advisable, then in reduced pipe, be packed into the gravel bag of geotextiles parcel and the coarse sand bag of geotextiles parcel successively, 1st flange has been bolted blind flange dish, before installation, outside brush anti-corrosion material in blind flange dish.
The embodiment of the present invention the 1st flange 8 and the 3rd flange 4 are welded on outside and the inner side of reduced pipe respectively, 1st flange 8 is pans of annular, 1st flange disk ring limit is provided with bolt hole 17, is fixed together with the 2nd flange 9 or the corresponding bolt hole of blind flange dish 21 by bolt 10.Do not have filter bores above 1st flange, but be provided with aquaporin, blind flange dish 21 did not establish aquaporin, and blind flange dish 21 is used for shutoff the 1st flange.If by the shutoff of draining window, then blind flange dish 21 will be installed on the 1st flange; If make draining window ooze for row, then insert filtering material in reduced pipe, and use the 2nd flange 9 with filter bores.
Claims (8)
1. a window type catch pit, comprise pit shaft and well seat, pit shaft is positioned at the top of well seat, pit shaft is provided with the borehole wall (1), the borehole wall (1) is provided with draining window (18), the inwall of draining window (18) is truncated cone-shaped, it is characterized in that: draining window (18) is provided with reduced pipe (2), the outer wall of reduced pipe (2) and the inwall of draining window (18) suitable; The inner chamber of reduced pipe (2) is provided with cage (3), cage (3) is suitable with the inwall of reduced pipe (2), cage is filled with filter in (3), and the outside of reduced pipe (2) is provided with the 1st flange (8); The outside of cage (3) is provided with outer anti-limit (20), and outer anti-limit (20) contacts with the lateral surface (19) of the 1st flange (8); Described filter comprises filter (7), the gravel bag (5) of geotextiles parcel and the coarse sand bag (6) of geotextiles parcel, coarse sand bag (6) is positioned at the outside of gravel bag (5), the inner side of gravel bag (5) is filter (7), coarse sand particle diameter in coarse sand bag is 1 ~ 20mm, grain size of gravel in gravel bag (5) is 20 ~ 60mm, and filter (7) is provided with treatment hole (15).
2. a kind of window type catch pit according to claim 1, it is characterized in that: described 1st flange (8) is connected with the 2nd flange (9) by bolt (10), 2nd flange (9) is provided with filter bores (16), and the 2nd flange (9) is connected with collection and oozes device (12).
3. a kind of window type catch pit according to claim 2, is characterized in that: described collection oozes device as plastic blind-ditch, or flexible porous tube, or geotechnological straw mats.
4. a kind of window type catch pit according to claim 3, is characterized in that: the exposed surface of described reduced pipe (2), the 1st flange (8) and the 2nd flange (9) is coated with geotextiles (11).
5. a kind of window type catch pit according to claim 4, is characterized in that: the inner side of described reduced pipe (2) is provided with the 3rd flange (4).
6. a kind of window type catch pit according to claim 1, is characterized in that: the 1st flange (8) has been bolted blind flange dish (21).
7. the construction method of a kind of window type catch pit according to claim 4:
(1) well seat basis is excavated: well seat buried depth is not less than 2/3 of well seat height, and bearing capacity of foundation soil is not less than 200kPa;
(2) well seat makes: formwork supporting plate, puts reinforcing bar, pouring concrete, maintenance;
(3) pit shaft makes: formwork supporting plate, puts reinforcing bar, and reserved draining window, at the surfaces externally and internally brush anti-corrosion material of reduced pipe, then lays reduced pipe at draining window, pouring concrete, also maintenance together with reduced pipe is cast in pit shaft;
(4) in reduced pipe, put cage, filter plate is let slip in the inboard of cage, and the aperture of filter does not spill with gravel is advisable, in reduced pipe, be then packed into the gravel bag of geotextiles parcel and the coarse sand bag of geotextiles parcel successively; 1st flange has been bolted the 2nd flange, and be then coated with geotextiles at the exposed surface of described reduced pipe, the 1st flange and the 2nd flange, tighten with binding strip, the 2nd flange is connected with collection and oozes device.
8. the construction method of a kind of window type catch pit according to claim 6, the steps include:
(1) well seat basis is excavated: well seat buried depth is not less than 2/3 of well seat height, and bearing capacity of foundation soil is not less than 200kPa;
(2) well seat makes: formwork supporting plate, puts reinforcing bar, pouring concrete, maintenance;
(3) pit shaft makes: formwork supporting plate, puts reinforcing bar, and reserved draining window, at the surfaces externally and internally brush anti-corrosion material of reduced pipe, then lays reduced pipe at draining window, pouring concrete, also maintenance together with reduced pipe is cast in pit shaft;
(4) in reduced pipe, cage is put, filter plate is let slip in the inboard of cage, the aperture of filter does not spill with gravel is advisable, then in reduced pipe, be packed into the gravel bag of geotextiles parcel and the coarse sand bag of geotextiles parcel successively, 1st flange has been bolted blind flange dish, before installation, outside brush anti-corrosion material in blind flange dish.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410152657.XA CN103924652B (en) | 2014-04-06 | 2014-04-06 | A kind of window type catch pit and construction method thereof |
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| CN201410152657.XA CN103924652B (en) | 2014-04-06 | 2014-04-06 | A kind of window type catch pit and construction method thereof |
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| CN103924652B true CN103924652B (en) | 2016-03-30 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350638B (en) * | 2015-11-11 | 2017-04-26 | 中建交通建设集团有限公司 | Water-draining residue soil collecting pit and application thereof |
| CN109235616B (en) * | 2018-11-16 | 2021-02-19 | 洛阳栾川钼业集团股份有限公司 | Installation method of tailing dam drainage well arch bar |
| CN109487891A (en) * | 2018-11-29 | 2019-03-19 | 中钢集团马鞍山矿山研究院有限公司 | A kind of continous way gully suitable for the sedimentation water discharge of Tailings Dam fine tailings |
| CN109610628B (en) * | 2018-12-11 | 2020-12-08 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Drainage hole plugging structure of drainage well |
| CN112064746B (en) * | 2020-09-03 | 2022-10-04 | 安徽省国元建工集团有限公司 | Underwater blind drain plugging device and plugging method |
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| 关于尾矿库回水塔取水方式分析;纪斌;《中国钼业》;20020630;第26卷(第3期);第22-24页 * |
| 悬挂环式挡板排水井;董俊恺等;《铀矿冶》;19810228(第4期);第68-72页 * |
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| CN103924652A (en) | 2014-07-16 |
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