CN105019652B - Construction method for HDPE (high-density polyethylene) liner bottom of large-sized concentration tank - Google Patents
Construction method for HDPE (high-density polyethylene) liner bottom of large-sized concentration tank Download PDFInfo
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- CN105019652B CN105019652B CN201410172214.7A CN201410172214A CN105019652B CN 105019652 B CN105019652 B CN 105019652B CN 201410172214 A CN201410172214 A CN 201410172214A CN 105019652 B CN105019652 B CN 105019652B
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Abstract
The invention relates to a concentration tank, and discloses a construction method for the HDPE (high-density polyethylene) liner bottom of a large-sized concentration tank. The construction method comprises the steps of checking the thickness, strength and the like of an HDPE liner according to the stress analysis and calculation of the concentration tank; transporting an HDPE liner material manufactured in a factor to the site; after the construction of the bottom structure of the concentration tank is completed, backfilling earthwork, flattening and tamping the base surface, removing sundries with sharp edges and corners, and repairing the slope surface; spreading sand on the earthwork surface slope, and spreading gravels without sharp edges and corners within a platform; paving the bottom layer and the two top layers of HDPE liners according to the shape of the tank bottom; forming a drainage layer in the middle, and arranging seepage blocking lines between the two layers of HDPE liners; fixing two sides of the paved liners with the side wall of a top plate of a central bottom flow pump station and the tank wall base by using stainless steel chemical bolts respectively; and compacting and fixing the bolts and the liners with rubber plates, steel plates and gaskets, and sealing the surface with a waterproof sealant. The construction method solves the problem of seepage of the bottom structure of the concentration tank, and greatly shortens the construction period, so as to reduce the cost.
Description
Technical field
The present invention relates to concentration basin, more particularly to concentration basin liner construction method.
Background technology
Concentration basin is the main units in metallurgical mine project, and the diameter of large-scale concentration basin is general all more than 50 meters,
Reinforced concrete structure form, the construction method poured using burst is generally adopted to need a large amount of site operation personnel to carry out steel
Muscle colligation, formwork and concreting and maintenance work.
But, for the concentration basin of nearly hundred meters of diameter, there are some problems in existing reinforced concrete structure.To the west of Australia
As a example by 2, area of SINO IRON iron mine project ore dressings 90m diameter Tailing thickenings pond, original design employing reinforced concrete structure form,
Only bottom of pond armored concrete total amount just reaches 3100m3, the m of the bottom of pond gross area about 1.3 ten thousand2.The diameter 90m in single Tailing thickening pond,
Pool wall Zhou Changwei 282.74m, well beyond armored concrete arrange the requirement of the maximum spacing 35m at expansion joint, how to control
Thermal cracking is the key point for ensureing the not permeable leak of bottom of pond.Expansion joint should be set according to code requirement, it is clear that construction band can be given
Carry out very big difficulty, concentration basin base plate is typically combined into by polylith fanning strip, and seam is crisscross, often pond infiltration water is thin
Weak position.If not setting seam, structure design exceeds specification, needs to take special measure at aspects such as calculating, constructions, controls coagulation
The maximum crack width of soil.
Crack Producing reason be usually the direct stress of external load, the crack that structure secondary stress causes and such as temperature,
The crack that the deformation change such as contraction, expansion and differential settlement causes.This concentration basin is used to deposit highdensity mine tailing serosity, whole
The internal force that body is conducted oneself with dignity and ore pulp pressure is produced is very big.And because engineering location annual rainfall is few and long term high temperature, highest
Temperature is up to 49 DEG C.Concentration basin volume and surface area are all very big, such as adopt reinforced concrete structure, due to cement consumption it is more,
The heat of hydration that under such circumstances cement is produced can produce larger temperature change and contraction, so as to cause coagulation local products
Raw crack.It is also difficult even if taking subregion interval to pour in concrete construction, covering the safeguard procedures such as felt-cloth watering maintenance
To solve the problems, such as the generation in crack.While will also result in, the construction period is longer, special measure is costly, so as to cause construction to be made
Valency is higher.
The content of the invention
It is contemplated that overcoming the defect of prior art, there is provided a kind of large-scale concentration basin HDPE liners bottom of pond construction method.
The present invention avoids concentration basin bottom of pond structure seepage problem, construction period is greatly shortened, so as to reduces cost.
In order to solve above-mentioned technical problem, a kind of large-scale concentration basin HDPE liners bottom of pond construction method (HDPE described herein
For the english abbreviation of high density polyethylene (HDPE)), it includes
Step one, according to the aspects such as concentration basin force analysis and calculating, thickness, intensity to HDPE liners checked with
Just design requirement is met；
Step 2, factory makes HDPE gasket materials, transports to scene；
Step 3, scene is completed after the concentration basin polycrystalline substance construction and installation such as concentration basin underflow pumping plant, according to design drawing
On slope requirement complete backfilling of earthwork construction operation, also stone of sharp corners etc. is removed miscellaneous in smooth lay a good foundation surface
Thing is simultaneously fixed domatic, and substrate negative and positive angle should repair round and smooth；The grain composition of backfilling material needs to meet corresponding technical requirements, pressure
Solidity is not less than 95%；Cubic metre of earth surface grades lay 15mm thickness fine sands, flat roof area lay 20mm thickness particle diameters less than 7mm without point
The rubble of sharp corner angle；
Step 4, after the pool wall construction on the outside of backfill slight slope is finished, according to bottom of pond shape HDPE liners is laid, and has two
Layer；Bottom and upper strata are all HDPE liners, and upper thickness is two times of underlayer thickness, and centre is drainage blanket, two-layer HDPE liner
Between four road leaky block lines are set, leakage barrier line is EPDM sealing strip；The seam crossing of HDPE liners uses thermofussion welding
Connect；
Step 5, the liner both sides for laying use rustless steel with center underflow pumping plant top board side wall and pool wall basis respectively
Chemical bolt is fixed, and is fixed using the compacting of rubber slab, steel plate and liner between bolt and liner, and surface is close using waterproof gasket cement
Envelope.
Described large-scale concentration basin HDPE liners bottom of pond construction method, in the middle of the step 4, it is necessary to allow weld seam to carry out mistake
Position is installed to avoid the occurrence of cross soldered, is laid using T-shaped installation.
Described large-scale concentration basin HDPE liners bottom of pond construction method, in the middle of the step 4, has laid in HDPE liners
Bi Hou, before non-slip casting or water filling, in liner corner the sand pocket of a 10-20kg is placed every 2-3m, prevents liner quilt
Wind sweeps.
Compared with conventional rebar concrete concentration basin bottom of pond technology, HDPE liners bottom of pond construction method of the present invention is excellent
Point is as follows：
The consumption of armored concrete is significantly reduced, operating expenses is greatly reduced.To the west of two 90m diameters of Australia Sino projects
As a example by concentrator, intrinsic armored concrete bottom of pond armored concrete total amount 3100m3, construction period is about 2 ~ 3 months, applies
Work cost is about 700 ~ 8,000,000 Australian Dollars；And whole construction operations are completed by only needing 10 days using HDPE liners, construction cost
It is reduced to 990,000 Australian Dollars.
The insoluble crack seepy question of Large reinforced concrete pond bottom structure effectively prevent using HDPE liners.
Because HDPE gasket constructions speed of application is fast, personnel and device requirement are few, the impact to neighboring area construction is little；Together
When due to the duration shorten, or the construction of other specialties creates conditions.
Armored concrete is substituted using HDPE liners, the need of steel bar meter and on-site concrete centralizedly supply are not only avoid
Ask, and reduce the difficulty of site operation organization and administration, while reducing the throwing for facing concrete supply, scene facility etc. greatly
Enter expense.
Using HDPE liners, the impact to surrounding enviroment can be significantly reduced, reduce environmental pollution, meet energy-saving ring
The development trend of guarantor.
Specific embodiment
A kind of large-scale concentration basin HDPE liners bottom of pond construction method, it includes
Step one, according to the aspects such as concentration basin force analysis and calculating, thickness, intensity to HDPE liners checked with
Just design requirement is met；
Step 2, factory makes HDPE gasket materials, transports to scene；
Step 3, scene is completed after the concentration basin polycrystalline substance construction and installation such as concentration basin underflow pumping plant, according to design drawing
On slope requirement complete backfilling of earthwork construction operation, also stone of sharp corners etc. is removed miscellaneous in smooth lay a good foundation surface
Thing is simultaneously fixed domatic, and substrate negative and positive angle should repair round and smooth；The grain composition of backfilling material needs to meet corresponding technical requirements, pressure
Solidity is not less than 95%；Cubic metre of earth surface grades lay 15mm thickness fine sands, flat roof area lay 20mm thickness particle diameters less than 7mm without point
The rubble of sharp corner angle；
Step 4, after the pool wall construction on the outside of backfill slight slope is finished, according to bottom of pond shape HDPE liners is laid, and has two
Layer；Bottom and upper strata are all HDPE liners, and upper thickness is two times of underlayer thickness, and centre is drainage blanket, two-layer HDPE liner
Between four road leaky block lines are set, leakage barrier line is EPDM sealing strip；The seam crossing of HDPE liners uses thermofussion welding
Connect；Weld seam must be allowed to carry out arranged in dislocation to avoid the occurrence of cross soldered, laid using T-shaped installation.In the laying of HDPE liners
After finishing, before non-slip casting or water filling, the sand pocket of a 10-20kg is placed every 2-3m in liner corner, prevent liner
Swept by wind.
Step 5, the liner both sides for laying use rustless steel with center underflow pumping plant top board side wall and pool wall basis respectively
Chemical bolt is fixed, and is fixed using the compacting of rubber slab, steel plate and liner between bolt and liner, and surface is close using waterproof gasket cement
Envelope.
In the present invention HDPE liners installation difficult point mainly HDPE liner lowers and pump chamber concrete walls connection with
And the connection of top and steel construction pool wall.
Liner lower end and the connecting node of concentration basin center underflow pump chamber top board side wall concrete：It is mixed in underflow pump ceiling plate
The drilling of 150mm spacing is pressed on the same level position of solidifying soil lateral wall, the rustless steel chemical bolt of M10*100 is implanted into.At these
One is installed on bolt and encloses the thick rubber slab of 50mm width * 6mm, penetrate 2 layers of liner on bolt, then with 50mm width * 6mm thick banding pattern
Steel plate is firmly pressed abd fixed on rubber slab and liner on the side wall of concrete, is finally carried out along lateral wall with waterproof gasket cement whole
Circle sealing.
The connecting node of base plate at liner upper end and steel construction pool wall：Steel construction pool wall is pressed when making on the base plate of inner side
150mm spacing prewelding M16 bolts.Spacing according to M16 bolts is prevented in the elongated rubber blanket and two-layer HDPE of three layers of 50mm*2mm
Drill on water liner, and be spaced through bolt placement, top is covered simultaneously using the 6000mm*50mm*6mm band shape steel plates of prebored hole
It is fixed using nut.Check that adjacent two seam crossings with shape steel plate there can not be warpage, prevent from being seeped water at deformation.
Claims (5)
1. a kind of large-scale concentration basin HDPE liners bottom of pond construction method, it is characterised in that it includes
Step one, according to concentration basin force analysis and calculating, the thickness, intensity to HDPE liners is checked to meet design
Require；
Step 2, factory makes HDPE gasket materials, transports to scene；
Step 3, scene is completed after concentration basin polycrystalline substance construction and installation, and according to the slope requirement on design drawing the earthwork is completed
Backfill construction operation, smooth lay a good foundation surface removes the also stone and debris of sharp corners and fixes domatic, substrate negative and positive
Angle should repair round and smooth；Earthwork surface grades lay fine sand, and flat roof area lays the rubble of sharp corners；
Step 4, after the pool wall construction on the outside of backfill slight slope is finished, according to bottom of pond shape HDPE liners is laid, and has two layers；
Bottom and upper strata are all HDPE liners, and upper thickness is two times of underlayer thickness, and centre is drainage blanket, between two-layer HDPE liner
Four road leaky block lines are set, and leakage barrier line is EPDM sealing strip；The seam crossing of HDPE liners uses sweat soldering；
Step 5, the HDPE liners both sides for laying use rustless steel with center underflow pumping plant top board side wall and pool wall basis respectively
Chemical bolt is fixed, and is fixed using the compacting of rubber slab, steel plate and HDPE liners between rustless steel chemical bolt and HDPE liners, table
Face is sealed using waterproof gasket cement.
2. large-scale concentration basin HDPE liners bottom of pond construction method according to claim 1, it is characterised in that the step 3
In, earthwork surface grades lay 15mm thickness fine sands, and flat roof area lays 20mm thickness particle diameters less than 7mm without the broken of sharp corners
Stone.
3. large-scale concentration basin HDPE liners bottom of pond construction method according to claim 1, it is characterised in that the step 3
Central, the grain composition for backfilling working material needs to meet corresponding technical requirements, and compactness is not less than 95%.
4. large-scale concentration basin HDPE liners bottom of pond construction method according to claim 1, it is characterised in that the step 4
It is central, it is necessary to allow weld seam to carry out arranged in dislocation to avoid the occurrence of cross soldered, laid using T-shaped installation.
5. large-scale concentration basin HDPE liners bottom of pond construction method according to claim 1, it is characterised in that the step 4
It is central, after the laying of HDPE liners is finished, before non-slip casting or water filling, one is placed every 2-3m in HDPE liners corner
The sand pocket of 10-20kg, prevents HDPE liners from being swept by wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410172214.7A CN105019652B (en) | 2014-04-28 | 2014-04-28 | Construction method for HDPE (high-density polyethylene) liner bottom of large-sized concentration tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410172214.7A CN105019652B (en) | 2014-04-28 | 2014-04-28 | Construction method for HDPE (high-density polyethylene) liner bottom of large-sized concentration tank |
Publications (2)
| Publication Number | Publication Date |
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| CN105019652A CN105019652A (en) | 2015-11-04 |
| CN105019652B true CN105019652B (en) | 2017-04-19 |
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| CN201410172214.7A Active CN105019652B (en) | 2014-04-28 | 2014-04-28 | Construction method for HDPE (high-density polyethylene) liner bottom of large-sized concentration tank |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5843554A (en) * | 1994-02-18 | 1998-12-01 | Katman, Inc. | Multi-layer covering articles |
| CN100425787C (en) * | 2007-06-29 | 2008-10-15 | 四川大学 | Cement mortar free simple agricultural pond |
| CN101225715A (en) * | 2008-01-18 | 2008-07-23 | 杭州市市政工程集团有限公司 | HDPE film flexible structure bottom board pool and construction method thereof |
| CN203428981U (en) * | 2013-05-22 | 2014-02-12 | 广东开源环境科技有限公司 | Anti-seepage structure on bottom of constructed wetland pool |
| CN203327637U (en) * | 2013-06-14 | 2013-12-11 | 扬州大学 | Vegetable paddy-upland rotation cultivation facility |
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