CN108755778B - Sodium bentonite waterproof blanket and construction method thereof - Google Patents
Sodium bentonite waterproof blanket and construction method thereof Download PDFInfo
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- CN108755778B CN108755778B CN201810513243.3A CN201810513243A CN108755778B CN 108755778 B CN108755778 B CN 108755778B CN 201810513243 A CN201810513243 A CN 201810513243A CN 108755778 B CN108755778 B CN 108755778B
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- sodium bentonite
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- waterproof blanket
- bentonite waterproof
- frame
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- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 229940080314 sodium bentonite Drugs 0.000 title claims abstract description 84
- 229910000280 sodium bentonite Inorganic materials 0.000 title claims abstract description 84
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 239000004744 fabric Substances 0.000 claims abstract description 103
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000002689 soil Substances 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 19
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 239000013505 freshwater Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000004078 waterproofing Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000002759 woven fabric Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 239000012466 permeate Substances 0.000 abstract description 4
- 238000002791 soaking Methods 0.000 abstract description 3
- 229940092782 bentonite Drugs 0.000 description 16
- 229910000278 bentonite Inorganic materials 0.000 description 16
- 239000000440 bentonite Substances 0.000 description 16
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 15
- 238000004080 punching Methods 0.000 description 5
- 239000004746 geotextile Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/004—Sealing liners
-
- 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
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/006—Sealing of existing landfills, e.g. using mining techniques
-
- 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
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0085—Geotextiles
- E02D2300/009—Geotextiles with multi-layer structure
- E02D2300/0092—Geotextiles with multi-layer structure including a liquid tight layer
- E02D2300/0093—Geotextiles with multi-layer structure including a liquid tight layer including bentonite
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Revetment (AREA)
Abstract
The invention discloses a sodium bentonite waterproof blanket and a construction method thereof, wherein a polygonal columnar diversion trench is arranged between fabric surface cloth and fabric base cloth, a cavity is enclosed by the frame of the diversion trench, the upper edge of the frame is provided with a plurality of through water permeable holes, the lower edge of the frame is spaced from the fabric base cloth, and quick-setting dry powder mortar is filled in the frame; the space enclosed by the fabric shell fabric, the fabric base fabric and the diversion trench is filled with sodium bentonite powder. When the sodium bentonite waterproof blanket is used, accumulated water on the surface of a permeable concrete pavement or a soil slope and the like can permeate into the fabric surface cloth of the sodium bentonite waterproof blanket, and the communicated permeable holes are formed between the fabric surface cloth and the cavity in the diversion trench, so that the permeated water can enter the cavity to flow away, and the problem that the concrete pavement or the soil slope is damaged by soaking due to the accumulated water left between the sodium bentonite waterproof blanket and the concrete pavement or the soil slope is solved.
Description
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a sodium bentonite waterproof blanket and a construction method thereof.
Background
The bentonite waterproof blanket is a special seepage-proof geosynthetic material for artificial lake waterscape, garbage landfill, underground garage, roof garden, pool, oil depot, chemical storage yard and the like. The high-expansibility sodium bentonite is filled between special composite geotextile and non-woven fabric, and the bentonite anti-seepage pad prepared by a needle punching method can form a plurality of small fiber spaces, so that bentonite particles can not flow, and a uniform high-density colloidal waterproof layer is formed in the pad when meeting water, so that the water leakage can be effectively prevented.
At present, the bentonite waterproof blanket can be divided into the following steps according to the production process: a needle punching sodium bentonite waterproof blanket, a needle punching film covering sodium bentonite waterproof blanket and an adhesive method sodium bentonite waterproof blanket. The needle punching film covering method sodium bentonite waterproof blanket is characterized in that a layer of high-density polyethylene geomembrane is compounded on the outer surface of the non-woven geotextile of the needle punching sodium bentonite waterproof blanket. The sodium bentonite waterproof blanket is produced by adhering bentonite grains to high density polyethylene board with adhesive and compressing.
The existing bentonite waterproof blanket has two sides waterproof, namely, once the bentonite waterproof blanket is wetted, the water on the upper side and the lower side of the bentonite waterproof blanket can not penetrate basically. However, in some places such as permeable concrete roads, soil slopes, etc., it is not only necessary that the water on the surface does not penetrate into the soil layer to avoid sedimentation, but also that the water on the surface of the bentonite waterproof blanket flows away to avoid soaking the permeable concrete roads, soil slopes, etc., which may result in damage to the permeable concrete roads, soil slopes, etc. Thus, existing waterproof blankets are only capable of waterproofing and do not direct deposited water.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a sodium bentonite waterproof blanket and a preparation method thereof, aiming at solving the problem that the existing bentonite waterproof blanket cannot guide the deposited water.
A sodium bentonite waterproof blanket comprises a fabric shell fabric and a fabric base fabric;
a polygonal columnar diversion trench is arranged between the fabric surface cloth and the fabric base cloth, and the diversion trench comprises a frame and a cavity enclosed by the frame;
the upper edge of the frame is tightly attached to the fabric shell fabric, and a plurality of through water permeable holes are formed in the upper edge of the frame;
the lower edge of the frame is spaced from the fabric base fabric;
one layer of the outer side of the frame is made of a polyethylene film, one layer of the inner side of the frame is made of woven fabric, and quick-setting dry powder mortar is filled in the frame;
and filling sodium bentonite powder in the space defined by the fabric shell fabric, the fabric base fabric and the diversion trench.
Further, the indexes of the sodium bentonite powder are as follows: the particle size is more than 99 percent of 80 meshes, the expansion index is more than or equal to 30mL/2g, the durability is more than or equal to 20mL/2g, the filtration loss is less than or equal to 18mL, the Brookfield viscosity is more than 400cp, and the density is 0.6-0.8 g/mL.
Further, the gram weight of the sodium bentonite waterproof blanket is 3800-4500g/m2。
Furthermore, the compressive strength of the quick-setting dry powder mortar can reach more than 15MPa within 2-3 hours after water is added.
A construction method of a sodium bentonite waterproof blanket comprises any one of the sodium bentonite waterproof blanket in the scheme, and comprises the following construction steps:
treating the base layer of the waterproof construction pavement, removing raised impurities, leveling and tamping; meanwhile, the fabric base fabric is downward, and the waterproof blanket is paved by using hoisting equipment according to the sequence of the front vertical surface, the slope surface and the rear bottom surface;
after laying, inserting a water gun into the cavity for water injection, wherein the water injection height is not more than the height of the cavity;
after water is injected for 2-3 hours, fresh water spraying is carried out on the surface of the laid waterproof blanket;
and spraying the fresh water for 0.5-1 hour, and covering a permeable concrete pavement layer or a soil slope layer.
Furthermore, the sodium bentonite waterproof blanket laid in the step is subjected to repairing and strengthening treatment on a penetration part and a waterproof blanket damaged part;
the steps of the repair reinforcement treatment are as follows: cutting the sodium bentonite waterproof blanket at the penetrating part according to the shape of the penetrating part, and sealing and waterproofing the periphery of the material penetrating through the sodium bentonite waterproof blanket by adopting a sealing filling material; and cutting a small sodium bentonite waterproof blanket with the side length of 500mm added to the maximum diameter of the damaged part at the damaged part of the sodium bentonite waterproof blanket, and sealing and waterproofing the edge of the small sodium bentonite waterproof blanket by adopting the sealing and filling material.
According to the scheme, the invention provides the sodium bentonite waterproof blanket and the construction method thereof, wherein the sodium bentonite waterproof blanket comprises fabric shell fabric and fabric base fabric; a polygonal columnar diversion trench is arranged between the fabric surface cloth and the fabric base cloth, and the diversion trench comprises a frame and a cavity enclosed by the frame; a plurality of through water permeable holes are formed in the upper edge of the frame, a space is reserved between the lower edge of the frame and the fabric base fabric, and quick setting dry powder mortar is filled in the frame; the space enclosed by the fabric shell fabric, the fabric base fabric and the diversion trench is filled with sodium bentonite powder.
The construction method of the sodium bentonite waterproof blanket comprises the following construction steps: laying the waterproof blanket with the fabric base cloth facing downwards; after laying, inserting a water gun into the cavity for water injection; after water is injected for 2-3 hours, fresh water spraying is carried out on the surface of the laid waterproof blanket; and spraying the fresh water for 0.5-1 hour, and covering a permeable concrete pavement layer or a soil slope layer.
When the sodium bentonite waterproof blanket is used, accumulated water on the surface of a permeable concrete pavement or a soil slope and the like can permeate into the fabric surface cloth of the sodium bentonite waterproof blanket, and the communicated permeable holes are formed between the fabric surface cloth and the cavity in the diversion trench, so that the permeated water can enter the cavity to flow away, and the problem that the concrete pavement or the soil slope is damaged by soaking due to the accumulated water left between the sodium bentonite waterproof blanket and the concrete pavement or the soil slope is solved.
Drawings
FIG. 1 is a schematic structural view of a waterproof bentonite blanket according to the present invention;
fig. 2 is a schematic view of the structure of the diversion trench in the bentonite waterproof blanket of the present invention.
Wherein, 101-fabric surface cloth, 102-fabric bottom cloth, 103-bentonite layer, 104-diversion trench, 1041-frame, 1042-cavity and 1043-water permeable hole.
Detailed Description
The technical solutions in the embodiments shown in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments shown in the embodiments of the present invention.
Referring to fig. 1 and 2, a sodium bentonite waterproof blanket includes a fabric shell fabric 101 and a fabric base fabric 102; a polygonal columnar flow guide groove 104 is arranged between the fabric shell fabric 101 and the fabric base fabric 102, and the flow guide groove 104 comprises a frame 1041 and a cavity 1042 enclosed by the frame 1041; the upper edge of the frame 1041 is tightly attached to the fabric shell fabric 101, and a plurality of through water permeable holes 1043 are formed in the upper edge of the frame 1041; the lower edge of the frame 1041 is spaced from the fabric base fabric 102; one layer of the outer side of the frame 1041 is made of a polyethylene film, one layer of the inner side of the frame 1041 is made of woven fabric, and quick-setting dry powder mortar is filled in the frame 1041; sodium-based bentonite powder is filled in the space enclosed by the fabric shell fabric 101, the fabric base fabric 102 and the diversion trench 104.
When the permeable water-proof sodium bentonite blanket is used, surface accumulated water of the permeable concrete pavement or the soil slope and the like can permeate into the fabric surface cloth of the sodium bentonite blanket, and the permeable holes are arranged between the fabric surface cloth and the cavity in the diversion trench, so that permeated water can enter the cavity to flow away, and the problem that the concrete pavement or the soil slope is soaked to be damaged due to the accumulated water between the sodium bentonite blanket and the concrete pavement or the soil slope is solved.
According to an optimized scheme, the indexes of the sodium bentonite powder are as follows: the particle size is more than 99 percent of 80 meshes, the expansion index is more than or equal to 30mL/2g, the durability is more than or equal to 20mL/2g, the filtration loss is less than or equal to 18mL, the Brookfield viscosity is more than 400cp, the density is 0.6-0.8 g/mL, and the gram weight of the sodium bentonite waterproof blanket is 3800-2。
The powdery sodium bentonite has high response speed when meeting water, can achieve excellent anti-seepage performance under lower gram weight, and is beneficial to construction due to low gram weight. Meanwhile, in projects with less strict anti-seepage requirement and limited budget, granular sodium bentonite can be selected, the granular sodium bentonite has relatively low price and good stripping performance, but the gram weight of the granular sodium bentonite is more than or equal to 4500g/m2The powder sodium bentonite has good anti-seepage performance, the construction is inconvenient due to high gram weight, the response speed when meeting water is slow, and the anti-seepage performance after complete hydration is far lower than that of the powder sodium bentonite.
The fabric surface cloth 101 and the fabric base cloth 102 on both sides of the sodium bentonite waterproof blanket are non-woven fabrics and/or woven fabrics, and can be well combined with the surrounding soil body. The sodium bentonite waterproof blanket structure is characterized in that a layer of sodium bentonite is uniformly fixed between two layers of geotextiles, the bentonite expands when meeting water, the expansion coefficient can reach 24ml/2g, the preferable volume of the sodium bentonite waterproof blanket structure is 30ml/2g, and the bentonite expands in a limited space formed by the two layers of geotextiles to form a compact impermeable layer, so that a good impermeable effect is achieved. In addition, the sodium bentonite forms a high-density diaphragm under the hydraulic pressure state, when the thickness is about 3mm, the water permeability of the sodium bentonite is equivalent to 100 times of that of 30 cm-thick clay, and the sodium bentonite has strong self-water retention performance.
According to another optimization scheme of the invention, after water is added into the quick-setting dry powder mortar, the compressive strength can reach more than 15MPa within 2-3 hours. The invention mixes the market early strength mortar and the graded broken stone which meets the requirement, and can obtain the quick-setting early strength concrete which can be set in a short time and reach a certain strength, and the compression strength can reach more than 15MPa in 2-3 hours. The strength of the sodium bentonite waterproof blanket can be improved, the guide groove is formed after the mortar is condensed, accumulated water can be guided, and the phenomenon that accumulated water is left between the sodium bentonite waterproof blanket and a concrete pavement or a soil slope is avoided.
The invention also provides a construction method of the sodium bentonite waterproof blanket, which comprises the following steps: treating the base layer of the waterproof construction pavement, removing raised impurities, leveling and tamping; meanwhile, the fabric base cloth 102 is downward, and the waterproof blankets are laid by using hoisting equipment according to the sequence of the front vertical surface, the slope surface and the rear bottom surface; after laying, inserting a water gun into the cavity 1042 for water injection, wherein the water injection height is not more than the height of the cavity 1042; after water is injected for 2-3 hours, fresh water spraying is carried out on the surface of the laid waterproof blanket; and spraying the fresh water for 0.5-1 hour, and covering a permeable concrete pavement layer or a soil slope layer.
After the paving is finished, water is injected into the cavity 1042 of the sodium bentonite waterproof blanket, the water permeates into the dry powder mortar from the layer of the fabric on the inner side of the frame 1041 after the water is injected, and the water cannot enter the sodium bentonite because the layer of the fabric on the outer side of the frame 1041 is made of the polyethylene film. After the mortar is injected with water, the compressive strength of the mortar can reach more than 15MPa within 2-3 hours, and then the diversion trench 104 with higher strength is formed, so that the bearing capacity of the sodium bentonite waterproof blanket can be increased on one hand, and the purpose of diversion of accumulated water can be achieved on the other hand.
According to another optimized scheme of the invention, the sodium bentonite waterproof blanket laid in the step is subjected to repairing and strengthening treatment on a penetration part and a waterproof blanket damaged part;
the steps of the repair reinforcement treatment are as follows: cutting the sodium bentonite waterproof blanket at the penetrating part according to the shape of the penetrating part, and sealing and waterproofing the periphery of the material penetrating through the sodium bentonite waterproof blanket by adopting a sealing filling material; and cutting a small sodium bentonite waterproof blanket with the side length of 500mm added to the maximum diameter of the damaged part at the damaged part of the sodium bentonite waterproof blanket, and sealing and waterproofing the edge of the small sodium bentonite waterproof blanket by adopting the sealing and filling material.
In conclusion, the sodium bentonite waterproof blanket and the construction method thereof ensure that the sodium bentonite waterproof blanket has the function of guiding accumulated water when in use. The water permeable concrete road or the soil slope has water permeating holes between the fabric and the cavity in the flow guiding slot, so that the permeated water may flow away from the cavity and the water permeating holes may be maintained between the sodium bentonite waterproof blanket and the concrete road or the soil slope to damage the concrete road or the soil slope.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (6)
1. A sodium bentonite waterproof blanket comprises a fabric shell fabric (101) and a fabric base fabric (102), and is characterized in that:
a polygonal columnar flow guide groove (104) is arranged between the fabric shell fabric (101) and the fabric base fabric (102), and the flow guide groove (104) comprises a frame (1041) and a cavity (1042) enclosed by the frame (1041);
the upper edge of the frame (1041) is tightly attached to the fabric shell fabric (101), and a plurality of through water permeable holes (1043) are formed in the upper edge of the frame (1041);
the lower edge of the frame (1041) is spaced from the fabric base cloth (102);
one layer of the outer side of the frame (1041) is made of a polyethylene film, one layer of the inner side of the frame (1041) is made of woven fabric, and quick-setting dry powder mortar is filled in the frame (1041);
and sodium bentonite powder is filled in the space enclosed by the fabric shell fabric (101), the fabric base fabric (102) and the diversion trench (104).
2. The sodium bentonite waterproof blanket according to claim 1,
the indexes of the sodium bentonite powder are as follows: the particle size is more than 99 percent of 80 meshes, the expansion index is more than or equal to 30mL/2g, the durability is more than or equal to 20mL/2g, the filtration loss is less than or equal to 18mL, the Brookfield viscosity is more than 400cp, and the density is 0.6-0.8 g/mL.
3. The sodium bentonite waterproof blanket as claimed in claim 1 or 2, wherein the gram weight of the sodium bentonite waterproof blanket is 3800-4500g/m2。
4. The sodium bentonite waterproof blanket according to claim 1 or 2, wherein the compressive strength of the quick setting dry powder mortar after being added with water can reach more than 15MPa within 2-3 hours.
5. A construction method of a sodium bentonite waterproof blanket, which is characterized by comprising the sodium bentonite waterproof blanket of any one of claims 1 to 4, and the construction steps are as follows:
treating the base layer of the waterproof construction pavement, removing raised impurities, leveling and tamping; meanwhile, the fabric base cloth (102) is downward, and the waterproof blanket is paved by using hoisting equipment according to the sequence of the front vertical surface, the slope surface and the rear bottom surface;
after laying, inserting a water gun into the cavity (1042) for water injection, wherein the water injection height does not exceed the height of the cavity (1042);
after water is injected for 2-3 hours, fresh water spraying is carried out on the surface of the laid waterproof blanket;
and spraying the fresh water for 0.5-1 hour, and covering a permeable concrete pavement layer or a soil slope layer.
6. The method of constructing a sodium bentonite waterproof blanket according to claim 5,
repairing and strengthening the penetration part and the damaged part of the sodium bentonite waterproof blanket paved in the step;
the steps of the repair reinforcement treatment are as follows: cutting the sodium bentonite waterproof blanket at the penetrating part according to the shape of the penetrating part, and sealing and waterproofing the periphery of the material penetrating through the sodium bentonite waterproof blanket by adopting a sealing filling material; and cutting a small sodium bentonite waterproof blanket with the side length of 500mm added to the maximum diameter of the damaged part at the damaged part of the sodium bentonite waterproof blanket, and sealing and waterproofing the edge of the small sodium bentonite waterproof blanket by adopting the sealing and filling material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810513243.3A CN108755778B (en) | 2018-05-25 | 2018-05-25 | Sodium bentonite waterproof blanket and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810513243.3A CN108755778B (en) | 2018-05-25 | 2018-05-25 | Sodium bentonite waterproof blanket and construction method thereof |
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| CN108755778A CN108755778A (en) | 2018-11-06 |
| CN108755778B true CN108755778B (en) | 2020-04-07 |
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| CN113235553A (en) * | 2021-05-27 | 2021-08-10 | 南京万德斯环保科技股份有限公司 | Sodium bentonite waterproof blanket-cement clay slurry composite vertical separation wall system and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE248955T1 (en) * | 1998-02-13 | 2003-09-15 | Amcol International Corp | CLAY TOP LAYER |
| CN101942843B (en) * | 2010-09-01 | 2012-05-02 | 中国非金属矿工业公司 | Construction method of seawater-proof natural sodium geo-synthetic clay liner (GCL) |
| CN202017265U (en) * | 2011-03-17 | 2011-10-26 | 上海仁众实业有限公司 | Bentonite waterproof blanket with geogrid |
| CN103171182B (en) * | 2013-02-25 | 2015-01-14 | 北京中非博克科技有限公司 | Light powder geosynthetic clay liner |
| CN205604306U (en) * | 2016-03-31 | 2016-09-28 | 天津中联格林科技发展有限公司 | Perpendicular cut -pff wall of GCL |
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