CN104499508A - Landfill special slope geomembrane fixing structure and method - Google Patents
Landfill special slope geomembrane fixing structure and method Download PDFInfo
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- CN104499508A CN104499508A CN201410621694.0A CN201410621694A CN104499508A CN 104499508 A CN104499508 A CN 104499508A CN 201410621694 A CN201410621694 A CN 201410621694A CN 104499508 A CN104499508 A CN 104499508A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/04—Watertight packings for use under hydraulic pressure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2450/00—Gaskets
- E02D2450/10—Membranes
- E02D2450/105—Membranes impermeable
- E02D2450/106—Membranes impermeable for liquids
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Abstract
The invention discloses a landfill special slope geomembrane fixing structure and method. The structure comprises a slope, an underground water guide and draining layer, an under-membrane protecting layer and a base geomembrane, wherein the underground water guide and draining layer and the under-membrane protecting layer are laid on the slope, the base geomembrane is laid on the underground water guide and draining layer and the under-membrane protecting layer, the base geomembrane, the underground water guide and draining layer and the under-membrane protecting layer are integrated with the slope through clasp nails, the upper cover of each clasp nail is provided with a low-foaming closed-cell foam board, a double-polished-face geomembrane covers on the low-foaming closed-cell foam board, and the periphery of the double-polished-face geomembrane is welded with the base geomembrane. By the landfill special slope geomembrane fixing structure and method which is mature in technology, convenient in construction and high in safety, the problem that leakage occurs easily when bolts are used to fix the geomembrane on a steep rock slope and on a slope with partial recesses.
Description
Technical field
The present invention relates to environment-friendly engineering technical field, especially relate to a kind of landfill yard special side slope geomembrane fixed structure and fixing means thereof.
Background technology
Innoxious landfill processes household garbage, mine tailing etc. at present in the world to there is one of the solid of pollution, the main path of liquid debris to environment, for preventing pollution thing is to the pollution of surrounding enviroment, comparatively general way be to bottom landfill district, side slope and end face adopt geomembrane pollutant and surrounding enviroment to be isolated.Geomembrane in bottom of the reservior, conventional side slope, the laying of closing and anchoring way specification all clear and definite, but how geomembrane to be fixed with precipitous rock slope and side slope has local dent, how geomembrane is not done clearly with the special fixing ways such as side slope laminating that cave in, and the usual way in industry geomembrane and side slope is fixed with stainless steel bolt or with PE material bolt in conjunction with antiseepage pad.Because this way bolt is worn film fix, carry out Anti-seeping technology with nut compressing pad to the hole that screw rod wears film, effect is not very desirable, easily wears geomembrane place at screw rod and seepage occurs.
Close highly higher for landfill district, the side slope that the overall gradient of massif is greater than 45 °, often intermediate anchor ditch cannot be set, plastic film mulch construction is maximum difficult point, if once-paving puts in place and any anchor measure is not established in centre, geomembrane does not possess such tensile yield strength, therefore in plastic film mulch process, need highly arrange middle reinforcement every 8 ~ 10m and bring alternative anchoring groove.But adopt the usual way in existing industry to be used as middle reinforcing band, be difficult to ensure anti-seepage effect, ambient influnence is large.
Landfill slope unavoidably there will be the situation of local larger area depression, recess geomembrane and side slope wall cannot be fitted and form hollowing, and under rubbish load action, this place's geomembrane is easily pulled off or punctures, and causes seepage, repair difficulty very big, cost is often very high afterwards.
Chinese patent literature (the day for announcing: on April 30th, 2014, notification number: CN103758157A) disclose a kind of laying method of refuse landfill HDPE geomembrane, realized by following step: (1) cuts out and overlap joint, HDPE geomembrane is cut out, overlaps around reservoir area and reservoir area; (2) sweat soldering, overlap joint upper slice and bottom sheet between blast compressed air, formed compressed air channel, weld seam is formed at described compressed air channel the right and left, two panels HDPE geomembrane is carried out hot melt, docks rapidly after arriving temperature, and weld in described commissure; (3) check and repair, the HDPE geomembrane after completing sweat soldering checks, checks the damage part of the HDPE geomembrane laid, and damages part and is greater than more than 10% of every sheet HDPE geomembrane width, then this section sheared, again lay.
What technique scheme solved is that geomembrane is easily torn at weld seam sheet in process of deployment, causes the problem of seepage and the wasting of resources.
Chinese patent literature (the day for announcing: on January 5th, 2011, notification number: CN101936012A) disclose one way of life refuse landfill antiseepage film structure, particularly a kind of antiseepage film anchoring of precipitous, hard rock side slope individual layer leakage preventing structure side slope middle, it comprises bedrock side slope, sodium bentonite waterproof bed course GCL, antiseepage high density polyethylene film, the packed boulder bed of geotextiles, and it also comprises anchoring HDPE film; The antiseepage HDPE film be positioned at above sodium bentonite waterproof bed course GCL is fixedly connected with anchoring HDPE film leading portion is airtight by thermofussion welding, and the bent sheet after anchoring HDPE film bends downwards and sodium bentonite waterproof bed course GCL are fixedly connected on bedrock side slope through expansion bolt; The packed boulder bed of geotextiles is positioned at above antiseepage HDPE film.
Technique scheme solve be present stage rock slope, particularly solid rock side slope rock matter area the problem of refuse landfill to antiseepage film anchoring difficulty is set.
Summary of the invention
First goal of the invention of the present invention is to solve in precipitous high rock slope and having the side slope place bolt of local dent to fix the problem that seepage easily occurs geomembrane, provides the landfill yard special side slope geomembrane fixed structure that a kind of technology maturation, easy construction, safety are high.
Second goal of the invention of the present invention has the special side slopes such as local dent not have good fixing means to solve existing geomembrane and precipitous high rock slope and side slope, a kind of easy construction is provided, handling safety, the landfill yard special side slope geomembrane fixing means of technology maturation.
The present invention realizes the technical scheme that its first goal of the invention adopt: a kind of landfill yard special side slope geomembrane fixed structure, comprise side slope, underground water lead layer and film lower protective layer and basic geomembrane, described underground water lead layer and film lower protective layer are laid in side slope, described basic geomembrane is laid on above underground lead layer and film lower protective layer, described basic geomembrane and underground lead layer and film lower protective layer are followed closely by dog and side slope and are set to one, described dog is covered with low ratio foamed closed-cell foam plate, two Smooth-surface geomembrane is coated with above described low ratio foamed closed-cell foam plate, the periphery of described two Smooth-surface geomembrane and dog follow closely pressure basic geomembrane be welded to connect.This landfill yard special side slope geomembrane fixed structure, larger to the gradient, the structure that highly higher landfill slope and pit are fixed, by the special dog of one, basic geomembrane and underground water lead layer and film lower protective layer and side slope are fixed together firmly, because basic geomembrane and underground water lead layer and film lower protective layer can puncture by dog after fixing, in order to antiseep, one block of low ratio foamed closed-cell foam plate is covered above every dog, then the two Smooth-surface geomembrane of one deck is covered again in low ratio foamed closed-cell foam plate outside, two Smooth-surface geomembrane adopts the geomembrane repaired, the basic geomembrane of two Smooth-surface geomembrane with low ratio foamed closed-cell foam plate periphery is connected by the method for welding, the effective leakproof to dog perforation can be realized.This fixed structure, two Smooth-surface geomembrane and basic geomembrane are welded as a whole, effectively avoid basic geomembrane, in dog perforation place, seepage occurs, and low ratio foamed closed-cell foam plate can either the two Smooth-surface geomembrane of available protecting can not by the reverse bursting of dog cross bar under junk-heap body load action; It is stressed that this fixed structure makes basic geomembrane stress unit inherent dog nail pin hole place form two point, basic geomembrane can compress by dog simultaneously, its frictional force effectively can share again the gravity load of basic geomembrane, thus reduces the distortion that basic geomembrane is perforated hole place bore edges; Isolated by two Smooth-surface geomembrane between dog and percolate, dog is not easily corroded; This fixed structure easy construction, safety are high.
As preferably, described dog and pressing place of basic geomembrane are provided with the low ratio foamed closed-cell foam plate being with groove, and the described size of low ratio foamed closed-cell foam plate and the width fits of dog are arranged.Below dog, pad establishes one piece to be with reeded low ratio foamed closed-cell foam plate; after Ba Shi hammers into side slope; dog cross bar is absorbed in inside grooves; both add the thrust between dog and basic geomembrane, effectively protect again two Smooth-surface geomembrane under the load action of junk-heap body by the reverse bursting of dog cross bar.
As preferably, described dog is the round steel material members of U-shaped structure, and comprise the nail pin and cross bar that are wholely set, the width of described cross bar is more than or equal to 100mm, and the length of described nail pin is more than or equal to 200mm.Dog is special is said structure, compared with conventional bolt, after traditional bolt basis geomembrane is fixed, screw rod and nut can protrude from basic geotechnological face, and adopt PE material press strip or pad to pierce through as bolt the repairing measures that basic geomembrane forms hole, due to press strip or pad, to repair area very little, basic geomembrane when bolt hole place bears Action of Gravity Field for a long time, is pierced hole edge and there will be moderate finite deformation, and press strip and pad are easy to lose efficacy.And use the dog of this structure; because dog has two to follow closely pin; the nail tip of two nail pin hammers into side slope inside completely; cross bar on dog is pressed on basic geomembrane or low ratio foamed closed-cell foam plate; basic geomembrane is made to form two point at dog nail pin hole place in a stress unit stressed; simultaneously the cross bar of dog or low ratio foamed close cystosepiment and basement membrane can be compressed; its frictional force effectively can share basic geomembrane gravity load again, thus reduces the distortion that basic geomembrane is perforated hole place bore edges.
As preferably, the end of described nail pin is provided with nail tip, and described nail pin is provided with pawl on the inside circumference face of nail tip.Nail pin arranges nail tip, and nail pin arranges pawl, and what effectively can increase dog takes off tight power, effectively improves the Connected degree of dog and side slope.
As preferably, described low ratio foamed closed-cell foam plate minimum dimension is 150mm × 150mm, and thickness is more than or equal to 10mm, and the two Smooth-surface geomembrane minimum dimensions covered on low ratio foamed closed-cell foam plate are 250mm × 250mm, and thickness is equal with basic geomembrane thickness.Low ratio foamed closed-cell foam board size size is advisable effectively to cover dog, and the size one of two Smooth-surface geomembrane meets coverage requirement, and two is meet welding requirements, ensures the security against leakage in Long-Time Service process, avoids causing environment pollution.
As preferably, two Smooth-surface geomembrane weld with basic geomembrane after cross-section structure be trapezoidal cavity configuration.Such structure has good antiseep effect, and also have certain deformability, add service life, security performance is high.
The present invention realizes the technical scheme that its second goal of the invention adopt: the fixing means of a kind of landfill yard special side slope geomembrane fixed structure, and the fixing means of this landfill yard special side slope geomembrane fixed structure comprises the following steps:
Step 1: side slope or the smooth process of pit;
Step 2: lay underground water lead layer and film lower protective layer in side slope or pit;
Step 3: lay basic geomembrane on underground water lead layer and film lower protective layer;
Step 4: basic geomembrane and underground water lead layer and film lower protective layer are followed closely in the lump in side slope or pit with dog; Or a band reeded low ratio foamed closed-cell foam sleeve-board size and dog width fits arranged is set on dog, with dog, basic geomembrane and underground water lead layer and film lower protective layer are followed closely in the lump in side slope or pit;
Step 5: cover low ratio foamed closed-cell foam plate on dog;
Step 6: cover the low ratio foamed closed-cell foam plate on dog and dog by two Smooth-surface geomembrane, and the periphery of two Smooth-surface geomembrane and basic geomembrane are welded to connect, complete fixing.
The fixing means of this landfill yard special side slope geomembrane fixed structure, is particularly suitable for the overall gradient in hillside and is greater than 45 °, the higher side slope that cannot arrange anchoring groove and landfill district closes.The method is first carried out Slope leveling process and underground water lead layer and film lower protective layer and is laid, then basic geomembrane is laid, by dog, basic geomembrane and underground water lead layer and film lower protective layer and side slope are fixed as one, two Smooth-surface geomembrane is damaged under rubbish load action to prevent the cross bar of dog, below dog or above or simultaneously below and above the topping of geomembrane and two Smooth-surface geomembrane based on one block of expanded closed-cell cystosepiment is set, finally two Smooth-surface geomembrane is welded on basic geomembrane, so basic geomembrane gravity load is with by this fixed structure and is born, force-bearing situation meets the requirement of geomembrane tensile yield strength.This fixing means, easy to operate, safety is good, long service life, and consumptive material is few.
As preferably, described dog is the round steel material members of U-shaped structure, comprise the nail pin and cross bar that are wholely set, the width of described cross bar is more than or equal to 100mm, the length of described nail pin is more than or equal to 200mm, the end of described nail pin is provided with nail tip, and described nail pin is provided with pawl on the inside circumference face of nail tip.
As preferably, described low ratio foamed closed-cell foam plate minimum dimension is 150mm × 150mm, and thickness is more than or equal to 10mm, and the two Smooth-surface geomembrane minimum dimensions covered on low ratio foamed closed-cell foam plate are 250mm × 250mm, and thickness is equal with basic geomembrane thickness.
As preferably, this landfill yard special side slope geomembrane fixed structure interlock evenly be arranged on reinforcing band in the middle of side slope region in or in pit.Such structure effectively can carry the deadweight of basic geomembrane.
The invention has the beneficial effects as follows: 1. compared with conventional bolt immobilizing foundation geomembrane, after traditional basic geomembrane is fixed, screw rod and nut can protrude from basic geotechnological face, the method that cannot cover with geomembrane is repaired, general employing PE material press strip or pad pierce through as bolt the repairing measures that basic geomembrane forms hole, very little owing to repairing area, basic geomembrane when bolt hole place bears Action of Gravity Field for a long time, be pierced hole edge and there will be moderate finite deformation, press strip and pad are easy to lose efficacy.And technical solution of the present invention is repaired the hole that dog nail pin pierces through by the two Smooth-surface geomembrane of the fritter be welded on basic geomembrane, repair area much larger than press strip or pad, antiseepage safety is high.
2. in prior art, the bolt hole place formation single-point of geomembrane in a stress unit is stressed.And geomembrane dog nail pin hole place formation two point in a stress unit in technical solution of the present invention basis is stressed; basic geomembrane can compress by the cross bar of dog simultaneously; its frictional force effectively can share basic geomembrane gravity load again, thus reduces the distortion of basic geomembrane piercing hole place bore edges.
3. easily there is corrosion in bolt long period of soaking of the prior art in percolate.And isolate by the two Smooth-surface geomembrane of fritter between technical solution of the present invention dog and percolate, good endurance.
4. prior art adopts PE material press strip or pad to wear the hole repair measure at basic geomembrane place as bolt, and this way is difficult to carry out antiseepage detection.Technical solution of the present invention the two Smooth-surface geomembrane of fritter and basic geomembrane is welded together by the method for patch installing, and operating technology is ripe, good leak-proof effect, and has ripe leak detection method.
5. adopt fixed structure of the present invention and the safety of fixing means immobilizing foundation geomembrane high.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of landfill yard of the present invention special side slope geomembrane fixed structure;
Fig. 2 is a kind of structural representation of dog in the present invention;
Fig. 3 is the front view of landfill yard of the present invention special side slope geomembrane fixed structure;
Fig. 4 is a kind of distributed effect figure of landfill yard of the present invention special side slope geomembrane fixed structure;
Fig. 5 is the another kind of structural representation of landfill yard of the present invention special side slope geomembrane fixed structure;
Fig. 6 is the another kind of structural representation of dog in the present invention;
In figure: 1, side slope, 2, underground water lead layer and film lower protective layer, 3, basic geomembrane, 4, dog, 5, low ratio foamed closed-cell foam plate, 6, two Smooth-surface geomembrane, 7, nail pin, 8, cross bar, 9, nail tip, 10, pawl, 11, pit, 12, groove.
Detailed description of the invention
Also by reference to the accompanying drawings technical scheme of the present invention is described in further detail below by specific embodiment.
Embodiment 1:
At Fig. 1, in embodiment shown in Fig. 3, a kind of landfill yard special side slope geomembrane fixed structure, comprise side slope 1, underground water lead layer and film lower protective layer 2 and basic geomembrane 3, underground water lead layer and film lower protective layer 2 are laid in side slope 1, basis geomembrane 3 is laid on above underground lead layer and film lower protective layer 2, basis geomembrane 3 and underground lead layer and film lower protective layer 2 follow closelys by dog 4 and side slope 1 and are set to integrally, dog 4 is coated with low ratio foamed closed-cell foam plate 5, two Smooth-surface geomembrane 6 is coated with above low ratio foamed closed-cell foam plate 5, the periphery of two Smooth-surface geomembrane 6 and dog follow closely pressure basic geomembrane 3 be welded to connect.
Dog 4 is the round steel material members of U-shaped structure, and comprise the nail pin 7 and cross bar 8 that are wholely set, the width of cross bar 8 equals 100mm, and the length of nail pin 7 equals 200mm, and the end of nail pin 7 is provided with nail tip 9(and sees Fig. 2).
Low ratio foamed closed-cell foam plate 5 is of a size of 150mm × 150mm, and thickness equals 10mm, and the two Smooth-surface geomembrane 6 covered on low ratio foamed closed-cell foam plate 5 are of a size of 250mm × 250mm, and thickness is equal with basic geomembrane 3 thickness.Two Smooth-surface geomembrane 6 weld with basic geomembrane 3 after cross-section structure be trapezoidal cavity configuration.
The fixing means of this landfill yard special side slope geomembrane fixed structure comprises the following steps:
Step 1: the smooth process of side slope 1;
Step 2: lay underground water lead layer and film lower protective layer 2 at side slope 1 place;
Step 3: lay basic geomembrane 3 on underground water lead layer and film lower protective layer 2;
Step 4: basic geomembrane 3 and underground water lead layer and film lower protective layer 2 are followed closely in the lump in side slope 1 or pit 11 with dog 4; Dog 4 is the round steel material members of U-shaped structure, and comprise the nail pin 7 and cross bar 8 that are wholely set, the width of cross bar 8 equals 100mm, and the length of nail pin 7 equals 200mm, and the end of nail pin 7 is provided with nail tip 9.
Step 5: cover low ratio foamed closed-cell foam plate 5 on dog 4; Low ratio foamed closed-cell foam plate 5 is of a size of 150mm × 150mm, and thickness equals 10mm.
Step 6: cover the low ratio foamed closed-cell foam plate 5 on dog 4 and dog by two Smooth-surface geomembrane 6, and the periphery of two Smooth-surface geomembrane 6 and basic geomembrane 3 are welded to connect, complete fixing.The two Smooth-surface geomembrane 6 covered on low ratio foamed closed-cell foam plate 5 are of a size of 250mm × 250mm, and thickness is equal with basic geomembrane 3 thickness.
This landfill yard special side slope geomembrane fixed structure interlocks and is evenly arranged in the middle reinforcing band region of side slope or (see figure 4) in pit.
Embodiment 2:
In the embodiment shown in fig. 5, a kind of landfill yard special side slope geomembrane fixed structure, comprise pit 11, underground water lead layer and film lower protective layer 2 and basic geomembrane 3, underground water lead layer and film lower protective layer 2 are laid in side slope 1, basis geomembrane 3 is laid on above underground lead layer and film lower protective layer 2, basis geomembrane 3 and underground lead layer and film lower protective layer 2 follow closelys by dog 4 and pit 11 and are set to integrally, the low ratio foamed closed-cell foam sleeve-board of the band fluted 12 one size and dog 4 width fits arranged is set on dog 4, with dog 4, basic geomembrane 3 and underground water lead layer and film lower protective layer 2 are followed closely in the lump on pit 11, dog 4 is covered with one block of low ratio foamed closed-cell foam plate 5, above low ratio foamed closed-cell foam plate 5, is coated with two Smooth-surface geomembrane 6, the periphery of two Smooth-surface geomembrane 6 and dog follow closely pressure basic geomembrane 3 be welded to connect.
Dog 4 is the round steel material members of U-shaped structure, comprise the nail pin 7 and cross bar 8 that are wholely set, the width of cross bar 8 equals 120mm, and the length of nail pin 7 equals 250mm, the end of nail pin 7 is provided with nail tip 9, and nail pin 7 is provided with pawl 10(and sees Fig. 6 on the inside circumference face of nail tip 9).
Low ratio foamed closed-cell foam plate 5 is of a size of 200mm × 200mm, and thickness equals 12mm, and the two Smooth-surface geomembrane 6 covered on low ratio foamed closed-cell foam plate 5 are of a size of 300mm × 300mm, and thickness is equal with basic geomembrane 3 thickness.Two Smooth-surface geomembrane 6 weld with basic geomembrane 3 after cross-section structure be trapezoidal cavity configuration.
The fixing means of this landfill yard special side slope geomembrane fixed structure comprises the following steps:
Step 1: smooth process is carried out to pit 11;
Step 2: lay underground water lead layer and film lower protective layer 2 at pit 11 place;
Step 3: lay basic geomembrane 3 on underground water lead layer and film lower protective layer 2;
Step 4: the low ratio foamed closed-cell foam sleeve-board of the band fluted 12 size and dog 4 width fits arranged is set on dog 4, follows closely with dog 4 on pit 11 by basic geomembrane 3 and underground water lead layer and film lower protective layer 2 in the lump; Dog 4 is the round steel material members of U-shaped structure, comprise the nail pin 7 and cross bar 8 that are wholely set, the width of cross bar 8 equals 120mm, and the length of nail pin 7 equals 250mm, the end of nail pin 7 is provided with nail tip 9, and nail pin 7 is provided with pawl 10 on the inside circumference face of nail tip 9.
Step 5: cover low ratio foamed closed-cell foam plate 5 on dog 4; Low ratio foamed closed-cell foam plate 5 is of a size of 200mm × 200mm, and thickness equals 12mm.
Step 6: cover the low ratio foamed closed-cell foam plate 5 on dog 4 and dog by two Smooth-surface geomembrane 6, and the periphery of two Smooth-surface geomembrane 6 and basic geomembrane 3 are welded to connect, complete fixing.The two Smooth-surface geomembrane 6 covered on low ratio foamed closed-cell foam plate 5 are of a size of 300mm × 300mm, and thickness is equal with basic geomembrane 3 thickness.
Landfill yard described in above-mentioned example special side slope geomembrane fixed structure and fixing means thereof, be specially adapted in precipitous rock slope and have the side slope place of local dent to fix geomembrane, technique scheme utilizes dog can put down button and fixes, do not expose by the feature on button surface, two for fritter Smooth-surface geomembrane is covered on dog, two Smooth-surface geomembrane and basic geomembrane weld together, when this fixed structure applies pressure, the low ratio foamed closed-cell foam plate of dog cross bar and band groove can ensure that basic geomembrane and two Smooth-surface geomembrane are not destroyed effectively.Dog nail pin length is generally not less than for 200mm, and can also arrange pawl inside dog, what increase dog clenches power.Above-mentioned fixed structure and fixing means thereof are widely used.
The comparatively steep and highly higher landfill slope that closes for the gradient, the overall gradient is greater than 45 °, and landfill district closes higher highly again, it is very big that this type of landfill slope will highly arrange an anchoring groove difficulty every 8-10m as conventional landfill slope, and single-stage slope height is often far more than 10m.If once-paving puts in place and any anchor measure is not established in centre, geomembrane does not possess such tensile yield strength, therefore in plastic film mulch process, need highly arrange middle reinforcement every 8 ~ 10m and bring alternative anchoring groove.
Adopt the specific practice of technical scheme as follows:
First carry out the smooth process of side slope 1 and the laying of film lower protective layer, then the laying operation of basic geomembrane is carried out, every 8 ~ 10m, one reinforcing band is highly set, reinforcing band place by dog 4 to basic geomembrane and under underground water lead layer and film lower protective layer 2 follow closely in the lump in the side slope at reinforcing band place, dog 4 level interval 1m, adopt 3 rows, array pitch 0.5m, often row is staggeredly arranged, two Smooth-surface geomembrane 6 on it are damaged under rubbish load action for preventing the cross bar of dog, dog is used 10mm thick low ratio foamed closed-cell foam plate 5 as topping, be that the two Smooth-surface geomembrane 6 of 250mm × 250mm is welded on basic geomembrane 3 by minimum dimension again, simultaneously, in order to increase the thrust of dog to basic geomembrane, the low ratio foamed closed-cell foam plate of the band groove that a piece is matched with dog width also can be set below dog, while seal face between dog and basic geomembrane is increased, also the cross bar of dog is made to sink in low ratio foamed closed-cell foam plate, facilitate the setting of superstructure.After adopting this fixed structure, the reinforcing band that each reinforcing band following part basis geomembrane gravity load is reinforced by this fixed structure is born, force-bearing situation meets the requirement of basic geomembrane tensile yield strength, the geomembrane of high exasperate should be selected as much as possible on basic geomembrane is selected, to increase the frictional force of basic geomembrane and side slope, thus reduce the tensile stress of basic geomembrane.
When single this fixed structure of use, basic geomembrane can be fixed on landfill slope local has larger area recess.Landfill slope often there will be the situation of local larger area depression, recess basis geomembrane and side slope wall cannot be fitted and form hollowing, under rubbish load action, this basis, place geomembrane is easily pulled off or punctures, adopt fixed structure and the fixing means thereof of the application, basic geomembrane and side slope wall can be fitted, specific practice is: be first fixed in anchoring groove by underground water lead layer and film lower protective layer and basic geomembrane, with machinery by the basic geomembrane of side slope recess and side slope wall pressure tight, with dog, basic geomembrane is fixed on the side slope wall of depression, the quantity needing to use dog is determined according to the size of recess, then dog covers 10mm thick low ratio foamed closed-cell foam plate, and square for 250mm × 250mm pair Smooth-surface geomembrane is welded on basic geomembrane.The repairing of pit can be completed quickly and safely, and solid and reliable, long service life.
Claims (10)
1. a landfill yard special side slope geomembrane fixed structure, comprise side slope (1), underground water lead layer and film lower protective layer (2) and basic geomembrane (3), described underground water lead layer and film lower protective layer (2) are laid in side slope (1), described basic geomembrane (3) is laid on underground lead layer and film lower protective layer (2) top, it is characterized in that: described basic geomembrane (3) and underground lead layer and film lower protective layer (2) follow closelys by dog (4) and side slope (1) and be set to integrally, described dog (4) is covered with low ratio foamed closed-cell foam plate (5), described low ratio foamed closed-cell foam plate (5) top is coated with two Smooth-surface geomembrane (6), the periphery of described two Smooth-surface geomembrane (6) and dog (4) follow closely the basic geomembrane (3) of pressing and be welded to connect.
2. a kind of landfill yard according to claim 1 special side slope geomembrane fixed structure, it is characterized in that: described dog (4) and basic geomembrane (3) pressing place are provided with the low ratio foamed closed-cell foam plate (5) being with groove (12), and the size of described low ratio foamed closed-cell foam plate (5) and the width fits of dog (4) are arranged.
3. a kind of landfill yard according to claim 1 special side slope geomembrane fixed structure, it is characterized in that: the round steel material members that described dog (4) is U-shaped structure, comprise the nail pin (7) and cross bar (8) that are wholely set, the width of described cross bar (8) is more than or equal to 100mm, and the length of described nail pin (7) is more than or equal to 200mm.
4. a kind of landfill yard according to claim 3 special side slope geomembrane fixed structure, it is characterized in that: the end of described nail pin (7) is provided with nail tip (9), described nail pin (7) is provided with pawl (10) on the inside circumference face of nail tip (9).
5. a kind of landfill yard according to claim 1 special side slope geomembrane fixed structure, it is characterized in that: described low ratio foamed closed-cell foam plate (5) minimum dimension is 150mm × 150mm, thickness is more than or equal to 10mm, two Smooth-surface geomembrane (6) minimum dimension covered on low ratio foamed closed-cell foam plate (5) is 250mm × 250mm, and thickness is equal with basic geomembrane (3) thickness.
6. a kind of landfill yard special side slope geomembrane fixed structure according to claim 1 or 2 or 3 or 3 or 4 or 5, is characterized in that: two Smooth-surface geomembrane (6) weld with basic geomembrane (3) after cross-section structure be trapezoidal cavity configuration.
7. a fixing means for landfill yard special side slope geomembrane fixed structure, is characterized in that: the fixing means of this landfill yard special side slope geomembrane fixed structure comprises the following steps:
Step 1: side slope (1) or pit (11) smooth process;
Step 2: lay underground water lead layer and film lower protective layer (2) in side slope (1) or pit (11) place;
Step 3: at underground water lead layer and film lower protective layer (2) the basic geomembrane of upper laying (3);
Step 4: basic geomembrane (3) and underground water lead layer and film lower protective layer (2) are followed closely in the lump in side slope (1) or pit (11) with dog (4); Or the low ratio foamed closed-cell foam plate (5) of the band fluted (12) size and dog (4) width fits arranged overlaps and is set on dog (4), with dog (4), basic geomembrane (3) and underground water lead layer and film lower protective layer (2) are followed closely in the lump in side slope (1) or pit (11);
Step 5: at dog (4) upper covering low ratio foamed closed-cell foam plate (5);
Step 6: cover the low ratio foamed closed-cell foam plate (5) on dog (4) and dog by two Smooth-surface geomembrane (6), and the periphery of two Smooth-surface geomembrane (6) and basic geomembrane (3) are welded to connect, complete fixing.
8. the fixing means of a kind of landfill yard according to claim 7 special side slope geomembrane fixed structure, it is characterized in that: the round steel material members that described dog (4) is U-shaped structure, comprise the nail pin (7) and cross bar (8) that are wholely set, the width of described cross bar (8) is more than or equal to 100mm, the length of described nail pin (7) is more than or equal to 200mm, the end of described nail pin (7) is provided with nail tip (9), and described nail pin (7) is provided with pawl (10) on the inside circumference face of nail tip (9).
9. the fixing means of a kind of landfill yard according to claim 7 special side slope geomembrane fixed structure, it is characterized in that: described low ratio foamed closed-cell foam plate (5) minimum dimension is 150mm × 150mm, thickness is more than or equal to 10mm, two Smooth-surface geomembrane (6) minimum dimension covered on low ratio foamed closed-cell foam plate (5) is 250mm × 250mm, and thickness is equal with basic geomembrane (3) thickness.
10. the fixing means of a kind of landfill yard special side slope geomembrane fixed structure according to claim 7 or 8 or 9, is characterized in that: in the staggered region being evenly arranged on reinforcing band in the middle of side slope (1) of this landfill yard special side slope geomembrane fixed structure or in pit (11).
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| CN105835355A (en) * | 2016-05-28 | 2016-08-10 | 浙江双林机电科技有限公司 | Concrete protection lining production equipment |
| CN108086365A (en) * | 2017-12-19 | 2018-05-29 | 浙江科技学院 | Self-repairing refuse landfill impervious layer and self-repairing impervious method thereof |
| CN111069466A (en) * | 2019-12-26 | 2020-04-28 | 南京腾亚精工科技股份有限公司 | Continuous forming die for manufacturing triangular cramp nail and continuous forming triangular cramp nail |
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| CN111069466A (en) * | 2019-12-26 | 2020-04-28 | 南京腾亚精工科技股份有限公司 | Continuous forming die for manufacturing triangular cramp nail and continuous forming triangular cramp nail |
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| CN104499508B (en) | 2016-07-13 |
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