CN109736358A - A kind of construction method of antiseepage conditioning tank - Google Patents
A kind of construction method of antiseepage conditioning tank Download PDFInfo
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- CN109736358A CN109736358A CN201811639896.2A CN201811639896A CN109736358A CN 109736358 A CN109736358 A CN 109736358A CN 201811639896 A CN201811639896 A CN 201811639896A CN 109736358 A CN109736358 A CN 109736358A
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Abstract
The present invention relates to a kind of construction methods of antiseepage conditioning tank, comprising the following steps: S1: conditioning tank earth excavation, and rolls；S2: sandy gravel stratum is laid with；S3: short silk geotextile laying；S4: backfill silty clay；S5: long filament geotextile laying；S6: it is laid with HDPE film；S7: long filament geotextile laying；S8: silty clay is laid with；S9: concrete segment is laid with.The invention is " big based on sand-pebble layer infiltration coefficient; stratum such as is easy to settle at the reasons; proposes the multi-level bottom of pond seepage prevention system that is effectively combined with cohesive soil of earth working material; while substrate increases transition zone, top increase protective layer forms 9 layers of leakage preventing structure that Plate and Soil-cloth-film-cloth-soil-cloth-fines-former base combines, and improves transferring water resource utilization efficiency.
Description
Technical field
The present invention relates to the technical fields of conditioning tank antiseepage, more particularly, to a kind of construction method of antiseepage conditioning tank.
Background technique
Conditioning tank refers to the structures to adjust water-in and water-out flow.
Currently, Round Castle lake conditioning tank is the important component of Beijing's south water to north conveyance system, carry for it is western,
Each Water Works in northern city and the dividing water for urban rivers and lakes of the task.Conditioning tank water surface area is 33 hectares, and volume of regulating and storing is
1270000 m3.Its main task be to the 9th water factory, the 8th water factory, the tenth water factory, water factory, field village, Shoudu Iron and Steel Co water factory, the sub- water factory in city,
Five Li Tuo water factories and the mansion Liu Niang water factory and urban rivers and lakes etc. convey south water to north water, happen suddenly in project of South-to-North water diversion
When property water pollution accident, meet water of regulating and storing required in time of each water user by south water to north water source switching to local water source
Amount reduces water supply risk, improves water supply fraction.
Due to the geology of conditioning tank coverage area to rush proluvial layer of sand, based on gravel layer, the permeability of water is bigger, ground
Layer is easy to settle.So take reasonable seepage control measure to reduce leakage under this geological conditions, meanwhile, it prevents contaminated
Underground water enters in pond, protects conditioning tank water quality, is the problem faced when conditioning tank construction.
Summary of the invention
The object of the present invention is to provide a kind of construction methods of antiseepage conditioning tank, have the water prevented in conditioning tank well
The advantages of leakage.
The purpose of the present invention is what is be achieved by the following technical programs:
A kind of construction method of antiseepage conditioning tank, comprising the following steps: S1: conditioning tank earth excavation, and roll；S2: sandy gravel stratum
It is laid with；S3: short silk geotextile laying；S4: backfill silty clay；S5: long filament geotextile laying；S6: it is laid with HDPE film；S7: long
Silk geotextile laying；S8: silty clay is laid with；S9: concrete segment is laid with.
By using above-mentioned technical proposal, former base layer, sandy gravel stratum, short silk geotextile layer, farinose argillic horizon, length are set gradually
Silk geotextile layer, HDPE film layer, 9 layers of long filament geotextile layer, farinose argillic horizon and concrete segment layer leakage preventing structure, by geotechnological material
Material and cohesive soil are effectively combined, and with HDPE film layer for main impervious barrier, remaining is carried out as seepage in underground of the transition zone to pollution
Filtering, while in HDPE film layer two sides setting long filament geotextile layer carrying out that HDPE film layer is protected not to be destroyed, guarantee leakage preventing structure
Anti-seepage effect.The invention have can prevent in conditioning tank water permeate downwards infiltered with contaminated underground water it is excellent in pond
Point protects conditioning tank water quality.
The present invention is further arranged to: the silty clay in the step S4 and step S8 is to screen in conditioning tank excavated material
Clay afterwards.
By using above-mentioned technical proposal, backfill is using the silty clay in excavated material, save the cost, while by silty
Clay is filtered, and prevents the sundries such as the tree root in silty clay, building waste, house refuse from making geomembrane damage.
The present invention is further arranged to: the partial size of sandy gravel stratum described in step S2 is less than 2cm.
By using above-mentioned technical proposal, the partial size of gravel is too greatly when rolling leakage preventing structure, it is easy to will be native
Work cloth is destroyed, and leakage preventing structure is caused to lose anti-seepage effect.
The present invention is further arranged to: the adjacent HDPE film lap of splice is not less than 10 cm in the step S6.
By using above-mentioned technical proposal, makes to overlap between adjacent HDPE film more sufficiently, prevent lap-joint incomplete, make
It is permeated up at the underground water of pollution by the lap-joint of HDPE film, to cause the water in conditioning tank contaminated.
The present invention is further arranged to: HDPE film uses " wave close to the position of conditioning tank slope protection barricade in the step S6
Shape wave " shape is laid with.
By using above-mentioned technical proposal, to HDPE film, there are enough deformation spaces, and pool side concrete revetment is avoided to keep off
Wall and backfill sedimentation difference cause HDPE film drawing crack, to cause conditioning tank antiseepage action deprivation.
The present invention is further arranged to: earthing compaction technology test on HDPE film is carried out before the step S8.
By using above-mentioned technical proposal, by carrying out rolling examination to the silty clay for being covered with different-thickness on HDPE film
It tests, has found suitable silty clay backfill thickness, while guaranteeing that HDPE film is not destroyed when rolling silty clay again.
The present invention is further arranged to: silty clay is not less than 96% with a thickness of 30cm, compactness in the step S4.
It is levelling to the progress of short silk geotextile layer upper layer by using above-mentioned technical proposal, guarantee the smooth of work surface, simultaneously
Clay layer and short silk geotextile layer are combined closely, the tension and anti-pressure ability of leakage preventing structure is improved, prevents permeation-resisting structure layer from sending out
Raw sedimentation.
The present invention is further arranged to: the lap width of short silk geotextile layer is not less than 10cm in the step S3.
By using above-mentioned technical proposal, makes to overlap between short silk geotextile layer more sufficiently, prevents lap-joint incomplete,
The underground water polluted is permeated up by short silk geotextile layer.
The present invention is further arranged to: farinose argillic horizon is not less than 96% with a thickness of 80cm, compactness in the step S8.
By using above-mentioned technical proposal, silty clay has protective effect to HDPE film, avoid HDPE film because it is longer when
Between illumination ageing or the problem of torn by wind.Silty clay has levelling base and increases the effect of leakage preventing structure stability simultaneously
Fruit.
The present invention is further arranged to: filling fine sand between adjacent concrete blocks in the step S10.
By using above-mentioned technical proposal, the gap between ecological interlocked block is filled by fine sand, makes concrete layer
Anti-seepage effect is more preferable, while concrete layer compactness is more preferable, and bearing capacity is stronger.
In conclusion advantageous effects of the invention are as follows:
The invention is that " big based on sand-pebble layer infiltration coefficient, stratum is easy to the reasons such as sedimentation, proposes earth working material and cohesive soil
The multi-level bottom of pond seepage prevention system effectively combined, while substrate increases transition zone, top increases protective layer and forms Plate and Soil-cloth-
9 layers of leakage preventing structure that film-cloth-soil-cloth-fines-former base combines, improve transferring water resource utilization efficiency, at the same prevent by
Polluted underground water penetrates into conditioning tank, and water in conditioning tank is protected not to be contaminated.
Detailed description of the invention
Fig. 1 is structure sheaf schematic diagram of the invention；
Fig. 2 is process flow diagram of the invention.
In figure, 1, former base layer；2, sandy gravel；3, short silk geotextiles；4, silty clay；5, long filament geotextiles；6, HDPE film；
7, concrete layer.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Referring to Figures 1 and 2, by taking the construction of Round Castle lake conditioning tank as an example, for a kind of applying for antiseepage conditioning tank disclosed by the invention
Work method, comprising the following steps:
S1: earth excavation is carried out to pool area is adjusted first with digging machine, until being excavated to the above 2cm of design altitude, using 18t
Vibrating roller rolls 4 times (2 is quiet, 2 move), sufficiently to sprinkle water before rolling.Bottom of pond former base layer 1 rolls rear relative density and is not less than 0.75,
Meet design compaction requirement.Conditioning tank excavated material carries out sieving and collects together heap simultaneously, with the needs for constructing later.
S2: after the completion of former base layer 1 rolls, backfilling screened sandy gravel 2, and the maximum particle diameter of sandy gravel 2 is not more than 2cm,
Thickness 20cm, virtual resurfacing thickness 25cm. are simultaneously rolled 4 times (2 is quiet, 2 move) with 18t vibrating roller, and sandy gravel 2 is compacted preceding watering, sandy gravel 2
Relative density after the completion of layer rolls is not less than 0.75.
S3: after the completion of sandy gravel 2 backfills, being laid with the short silk geotextiles 3 of one layer of 300g/ ㎡, before short silk geotextiles 3 are laid with,
It must assure that sandy gravel stratum surfacing, relative density meets design requirement.Short silk geotextiles 3 are paved to (suitably there are more than deformation
Amount), overlap joint, alignment after sutured.Geotextiles at least overlap 15cm, and minimum range of the suture needle away from earth working material wing is
10cm；
Geotextiles suture uses portable sack closer, and seam at least uses 1 row two-wire suture needle, when suture needle gage control in 6mm or so,
Joint face is elastic appropriate, naturally smooth, and geotextiles suture strength should be not less than the 70% of base material.
S4: short silk geotextiles 3 are laid with after completion, the silty clay 4 in excavated material of the backfill by screening, silty clay
4 compacted thickness 30cm, compactness are more than or equal to 96%.Continue side in short silk geotextiles 3 when backfilling silty clay 4 and reserves width not
Continued access side less than 1m, the attended operation of overlapping the slot when in order to lay.Paving earthwork formula is to attack and occupy method paving soil, and bull-dozer shakeouts；
Roller is 18t vibrating roller, is rolled 5 times.The sundries such as tree root, building waste, the house refuse in silty clay 4 are backfilled all to sieve
Choosing is clean, to prevent sundries from making geomembrane damage.
S5: the long filament geotextiles 5 of one layer of 300g/ ㎡ are laid with, the paving mode of long filament geotextiles 5 is the same as step S3.
S6: long filament geotextiles 5 are laid with after completion, carry out being laid with HDPE film 6, North and South direction is laid with when being laid with HDPE film 6
HDPE film 6, lap width degree is not less than 10 cm between film and film, and seam is parallel with minute mark line as far as possible.6 periphery of HDPE film needs anchor
Gu in slope protection barricade concrete, and tensile stress being generated when appropriate fold being stayed to avoid depression in film and is damaged.When being laid with geomembrane, film
The node formed between block should be T font, must not be used as cross.HDPE film 6 is environmental protection smooth surface density polyethylene film with high, single
Rolling up length is 100m and two kinds of 60m, breadth 8m film thickness 1.00mm.When laying, to flatten, be adjacent between film and basal plane, not have
Phenomena such as gas enclosure, folder mud, folder water.When welding the seam of film and film, wipe soldered lap-joint with clean gauze, accomplish it is anhydrous,
It is dustless, without dirt；HDPE film 6 should overlap in right amount in parallel to just.After the completion of welding, the double weld seams of heat seal are detected using aeration,
Single weld seam and T shape node are detected using vacuum pressure leak detecting；HDPE film 6 should be covered in time after being laid with simultaneously, appropriate
Kind protection, prevents ultraviolet radiation damage and block stone or construction machinery damaged geomembrane, the exposed time must not exceed 48 hours.
S7:HDPE film 6 is laid with after completion, and the long filament geotextiles 5 of one layer of 300g/ ㎡, long filament soil are laid on HDPE film 6
The paving mode of work cloth 5 is the same as step S5.
S8: silty clay 4 backfills, and in backfill, HDPE film 6 is in the range of pool side slope protection barricade 10m, laying depth
50cm, one layer is filled, and SD16TL bull-dozer rolls 5 times, and compactness is not less than 85%；Silty clay on HDPE film 6 in the middle part of conditioning tank
4 filling-up thickness 80cm, points two layers fill, and first floor 50cm, SD16TL bull-dozer rolls 5 times, second layer thickness 30cm, and SD16TL is pushed away
Native machine rolls 4 times, after the completion of rolling, and compactness is not less than 85%.The silty clay 4 of backfill is the powder after screening in excavated material
Matter clay 4.
S9: after the completion of upper layer silty clay 4 is laid with, using ecological interlocked block revetment, specification is 500 × 400 × 100mm
YS ecology interlocked block.After the completion of ecological interlocked block is laid with, ecological revetment brick surface is cleaned, fine sand joint filling is closely knit, and surface is flat
It is whole, uniform, no-sundries.
The invention is that " big based on sand-pebble layer infiltration coefficient, stratum is easy to the reasons such as sedimentation, proposes earth working material and glues
Property the multi-level bottom of pond seepage prevention system that effectively combines of soil, while substrate increases transition zone, top increases protective layer and forms plate-
9 layers of leakage preventing structure that soil-cloth-film-cloth-soil-cloth-fines-former base combines, improve transferring water resource utilization efficiency.
Cause 6 drawing crack of HDPE film to prevent pool side concrete revetment barricade and backfill from settling difference, using embedded wave
Shape wave anchor structure is attached.After the completion of bottom of pond underlayer rolls, manually from excavation 400mm × 200mm at concrete 1m
Ditch, the mound product dug out equally are 400mm × 200mm, edge does fillet processing close to concrete side.HDPE film 6 and geotextiles
Do the laying of " waveform " shape；It is punched on concrete every 250mm, aperture 10mm, bolt is installed, temporarily not nutting；Brush one
Layer neoprene, is bonded 100mm × 6mm rubber mat plate；HDPE film 6 penetrates bolt 60mm × 5mm band steel and expansion after punching
Bolt is firmly fixed；It is reserved with rubber fastening band at Retaining wall seam, using EVA hot-melt adhesive rubber fastening band and HDPE film
6 bondings, bolt presses are used in waterstop two sides.
Before step S8, field compaction test of banketing on 6 film of HDPE film is carried out, is determined in the case where not damaging HDPE film 6,
Determine that Casing ways on film, the number of plies and thickness, rolling apparatus etc. roll parameter.According to different thickness of earth covering, six areas are divided into,
Every area is 6m*4.8m.One, two, three area's thickness of earth covering of test are 50cm, wherein one, two differentiations, two layers of backfill, first layer 30cm,
Second layer 20cm；Four, five, six area's thickness of earth covering of test are 80cm, respectively two layers of backfill, wherein five, six area's thickness degree are
40cm, four area first layer 50cm, second layer 30cm.
Using dump truck transport the first floor on earthwork formula, using the method for attacking and occupying, backacter digging get rid of pave, bull-dozer it is smooth
The mode of rolling carries out the backfill of silty clay 4 construction on film.It rolls parameter setting: decking and rolling is carried out using SD16TL bull-dozer,
Number of rolling is controlled by 4 times, 5 times, 6 times.
Optimal construction technology is obtained according to experimental result, 4 construction technology of 80cm silty clay on HDPE film 6: first layer
Void paving 55cm attacks and occupies method paving soil using dump truck, and SDT16TL bull-dozer, which is paved, to roll 5 times；Second layer void spreads 34cm, self-unloading
Native on automobile, SDT16TL bull-dozer rolls 4 times.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of construction method of antiseepage conditioning tank, it is characterised in that: the following steps are included:
S1: conditioning tank earth excavation, and roll；
S2: sandy gravel (2) is laid with；
S3: short silk geotextiles (3) are laid with；
S4: backfill silty clay (4)；
S5: long filament geotextiles (5) are laid with；
S6: it is laid with HDPE film (6)；
S7: long filament geotextiles (5) are laid with；
S8: silty clay (4) is laid with；
S9: concrete segment (7) is laid with.
2. a kind of construction method of antiseepage conditioning tank according to claim 1, it is characterised in that: the step S4 and step
Silty clay (4) in S8 is the clay after screening in conditioning tank excavated material.
3. a kind of construction method of antiseepage conditioning tank according to claim 1, it is characterised in that: gravel described in step S2
Expect that the partial size of (2) is less than 2cm.
4. a kind of construction method of antiseepage conditioning tank according to claim 1, it is characterised in that: adjacent in the step S6
HDPE film (6) lap of splice is not less than 10 cm.
5. a kind of construction method of antiseepage conditioning tank according to claim 1, it is characterised in that: HDPE in the step S6
Film (6) is laid with close to the position of conditioning tank slope protection barricade using " waveform " shape.
6. a kind of construction method of antiseepage conditioning tank according to claim 1, it is characterised in that: the advance of the step S8
Earthing compaction technology is tested on row HDPE film (6).
7. a kind of construction method of antiseepage conditioning tank according to claim 1, it is characterised in that: silty in the step S4
Clay (4) is not less than 96% with a thickness of 30cm, compactness.
8. a kind of construction method of antiseepage conditioning tank according to claim 1, it is characterised in that: short silk in the step S3
The lap width of geotextiles (3) is not less than 10cm.
9. a kind of construction method of antiseepage conditioning tank according to claim 1, it is characterised in that: silty in the step S8
Clay (4) layer is not less than 96% with a thickness of 80cm, compactness.
10. a kind of construction method of antiseepage conditioning tank according to claim 1, it is characterised in that: phase in the step S10
Fine sand is filled between adjacent concrete segment (7).
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| CN201811639896.2A CN109736358A (en) | 2018-12-29 | 2018-12-29 | A kind of construction method of antiseepage conditioning tank |
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| CN201811639896.2A CN109736358A (en) | 2018-12-29 | 2018-12-29 | A kind of construction method of antiseepage conditioning tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114318993A (en) * | 2021-12-24 | 2022-04-12 | 东北林业大学 | Cold region highway cutting slope interlayer water disease treatment method |
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