CN106894446B - Super-long Basement jointless structure construction method - Google Patents
Super-long Basement jointless structure construction method Download PDFInfo
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- CN106894446B CN106894446B CN201710132658.1A CN201710132658A CN106894446B CN 106894446 B CN106894446 B CN 106894446B CN 201710132658 A CN201710132658 A CN 201710132658A CN 106894446 B CN106894446 B CN 106894446B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/0007—Base structures; Cellars
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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Abstract
Super-long Basement jointless structure construction method, belong to technical field of building construction, it is characterized in that by Super-long Basement blockette, continuously interlocking construct stage by stage, successively carry out blockette shoveling, blockette is completed foundation pit surface and is poured, blockette completes bottom slab concreting and exterior wall pours, and post-cast strip is reinforced in setting expansion between block and block；In this way by basement blockette, stage by stage intert construction, can effectively improve construction efficiency；Expansion joint is set between basement bottom surface layer, then post-cast strip is set between basement bottom board and bottom plate, not only adapt to the expansion because of caused by temperature change and is shunk, but also can be carried out jointless construction, effectively improves construction quality；Using joined methylcellulose in nonshrink concrete, hydration reaction speed can be slowed down, slowing down heat and generating speed；Aluminum nitride powder and silica flour are added in concrete, heat release can be accelerated；Collaboration reduces temperature rise, reduces and shrinks.
Description
Technical field
The present invention relates to technical field of building construction, especially a kind of Super-long Basement jointless structure construction method.
Background technique
Current China skyscraper is built on a large scale, and especially in transport development field, across river cross a river tunnel is built
So that the problem of underwater super long underground structure, causes more and more concerns.The engineering problem wherein reflected is mainly
The jointless construction problem of super long underground structure.It is general to use in order to keep the globality of structure and the impermeability of basement structure
Post-cast strip method, the provisional deformation joint as indwelling in cast-in-place integral reinforced concrete structure；It completes to main structure and heavy
Drop it is basicly stable after, then with slightly expanded concrete post-cast strip is closed, structure is made to form continuous entirety.
But in Over-length Basement Structure practice of construction, due to different durations, waterproofing grade, big section, large volume, with
And the influence of construction technology, building are easy to occur as soon as the harmfulness coagulation soil cracking generated by temperature, contraction in the construction stage
Seam, has seriously affected construction quality.
Summary of the invention
The technical problem to be solved by the present invention is to use the cast-in-place integral reinforced concrete of subregion for prior art problem
Structure, and jointless construction is carried out to Super-long Basement using the method for expansion reinforcement post-cast strip between each subregion, to guarantee
Construction quality.
In order to solve the above technical problems, the technical scheme adopted by the invention is that a kind of Super-long Basement jointless structure is constructed
Method, it is characterised in that by Super-long Basement blockette, continuously interlock construct stage by stage, successively carry out blockette shoveling, subregion
Block is completed foundation pit surface and is poured, and blockette completes bottom slab concreting and exterior wall pours, after setting expansion is reinforced between block and block
Pour band；Specifically include following construction procedure.
(1) excavate the first block: Super-long Basement being subjected to blockette shoveling and carries out slope retaining, complete the first block
Foundation pit excavates.
(2) arrange pile: setting-out being carried out according to the pile size that construction drawing gives, pile of arranging.
(3) bottom surface layer pours: the assembling reinforcement mesh sheet on the foundation pit earth's surface soil body, casting concrete mortar is then levelling,
As basement bottom surface layer.
(4) sidewall surfaces layer pours: on the soil body then assembling reinforcement mesh sheet, casting concrete mortar are looked on the inside of the foundation pit
It is flat, as sidewall of basement superficial layer, and in advance using sidewall surfaces layer as face die plate on the outside of exterior wall.
(5) excavate the second block: the first block bottom surface layer and sidewall surfaces layer pour after finishing and stablizing, then excavate second
Block carries out the 1st, 2,3, the construction of 4 steps.
Continue to carry out following construction procedure to the first block.
(6) drain setting and construction of waterproof layer: draining setting construction is carried out on pile according to design requirement, in bottom surface
Layer and sidewall surfaces layer carry out construction of waterproof layer.
(7) lay baseplate reinforcing bar net: arranging transverse steel, longitudinal reinforcement, the vertical steel of basement bottom board in bottom surface layer
Muscle and stirrup bind baseplate reinforcing bar net.
(8) lay exterior wall steel mesh: arranging the transverse steel of outer wall of basement, longitudinal reinforcement, vertical on sidewall surfaces layer
Reinforcing bar and stirrup bind exterior wall steel mesh.
(9) set up template: using sidewall surfaces layer as exterior wall outboard template, template is separately set in inner side of outer wall, with cloth on pile
The lacing wire fixed form set constitutes outer wall template structure.
(10) casting concrete: to baseplate reinforcing bar net and exterior wall steel mesh casting concrete, build up respectively basement bottom board and
Outer wall of basement.
(11) pile is reinforced: adding one layer of pile body reinforcing layer in pile outer surface.
(12) wet curing: wet curing is carried out according to design requirement.
(13) form removable: after concrete reaches design strength requirement, form removal completes the construction of the first block.
(14) construct the second block: the construction of 6-13 step is carried out to the second block；Third block is excavated, and carries out 1-4
Step construction；So it is sequentially completed subsequent block construction.
(15) each block engaging portion construction: the foundation pit earth's surface soil body upper berth between every two block sets rubber fastening band,
Expansion joint is set between basement bottom surface layer, setting and real plastic foamboard are pricked in the expansion joint above rubber fastening band；
It is laid with rubber fastening band on the soil body on the inside of foundation pit between two blocks, is arranged between sidewall of basement superficial layer flexible
Seam, setting and sturdy plastic foamboard in the expansion joint on the outside of rubber fastening band.
(16) expansion is set and reinforces post-cast strip: expansion being set between the bottom plate and bottom plate of each block, between exterior wall and exterior wall and is added
Strong post-cast strip, to the construction of each block after, then expanded between the bottom plate and bottom plate of each block, between exterior wall and exterior wall
Reinforce post empiricism, be laid with steel mesh, pour expansive concrete, completes basement jointless construction.
Above-mentioned steps (10) employed in concrete be nonshrink concrete, the nonshrink concrete is according to parts by weight by sulphur
3500-4100 parts of aluminate cement, sand 2500-2900 parts middle, 1540-1960 parts of flyash, 75-125 parts of methylcellulose,
5-9 parts of aluminum nitride powder, 40-60 parts of silica flour mixings, then be equipped with 250-300 parts of swelling agent and be prepared；The wherein swelling agent
Components by weight are as follows: 19-21 parts of anhydrite, 6-7 parts of magnesia, 7-8 parts of calcium oxide, 2-3 parts of tartaric acid, 4-5 parts of sodium metasilicate,
7-8 parts of sodium tripolyphosphate, 6-7 parts of sodium gluconate, 1-2 parts of sodium citrate；It is when preparing mortar, the parts by weight are nonshrink mixed
Sulphate aluminium cement, middle sand, flyash, methylcellulose, aluminum nitride powder, are 1. uniformly mixed by the three steps stirring of solidifying soil point first,
2. adding 2500-2900 parts of water to stir and evenly mix repeatedly, swelling agent is 3. then added and is uniformly mixed, obtains nonshrink concrete
Mortar.
Above-mentioned steps (16) employed in expansive concrete be changed to using nonshrink concrete.
The floor length of each block of basement is 30-40m, and it is 1.5m that post-cast strip width is reinforced in the expansion.
For the basement bottom board with a thickness of 400mm, reinforcing bar is 16@150 of double-layer double-direction [HRB400] φ, and outer wall of basement is thick
Degree is 250mm, and reinforcing bar is 14@150 of double-layer double-direction [HRB400] φ, and the ratio of reinforcement is not less than 0.3%.
Beneficial effects of the present invention by basement blockette, stage by stage intert construction, can both guarantee that continuity was seamless and apply
Work, and can save the construction time, it can effectively improve construction efficiency；Expansion joint is set between basement bottom surface layer, then
Post-cast strip is set between basement bottom board and bottom plate, not only adapt to because of caused by temperature change expansion and is shunk, but also can be into
Row jointless construction, effectively improves construction quality；Using joined methylcellulose in nonshrink concrete, hydration reaction can be slowed down
Speed slows down heat and generates speed；Aluminum nitride powder and silica flour are added in concrete, heat release can be accelerated；Collaboration drop
Low-temperature-rise is reduced and is shunk.
Detailed description of the invention
Fig. 1 is bottom surface and the metope structure schematic diagram of Super-long Basement.
Fig. 2 is that AA line expands reinforcement post-cast strip section structural schematic diagram in Fig. 1.
1. foundation pit, 2. bottom plates, 3. exterior walls, 4. expansion reinforce post-cast strips, 5. piles, 6. bottom surface layers, 7. sidewall surfaces layers,
8. waterproof layer, 9. rubber fastening bands, 10. expansion joints, 11. plastic foamboards.
Specific embodiment
Below with reference to embodiment, the invention will be further described, and following embodiment is intended to illustrate invention rather than to this
Further limiting for invention, should not be limited the scope of the invention with this.
As shown, Super-long Basement jointless structure construction method mainly connects by Super-long Basement blockette, stage by stage
It is continuous staggeredly to construct, blockette shoveling is successively carried out, blockette is completed 1 surface of foundation pit and poured, and blockette is completed bottom plate 2 and poured and outside
Wall 3 pours, and post-cast strip 4 is reinforced in setting expansion between block and block；Specifically include following construction procedure.
(1) excavate the first block: Super-long Basement being subjected to blockette shoveling and carries out slope retaining, complete the first block
Foundation pit 1 excavates.
(2) arrange pile: setting-out being carried out according to the pile size that construction drawing gives, pile 5 of arranging.
(3) bottom surface layer pours: the assembling reinforcement mesh sheet on the 1 earth's surface soil body of foundation pit, casting concrete mortar is then levelling,
As basement bottom surface layer 6.
(4) sidewall surfaces layer pours: then the assembling reinforcement mesh sheet on the 1 inside soil body of foundation pit, casting concrete mortar are looked for
It is flat, as sidewall of basement superficial layer 7, and in advance by sidewall surfaces layer 7 as face die plate on the outside of exterior wall.
(5) excavate the second block: the first block bottom surface layer 6 and sidewall surfaces layer 7 pour after finishing and stablizing, then excavate the
Two blocks carry out the 1st, 2,3, the construction of 4 steps.
Continue to carry out following construction procedure to the first block.
(6) drain setting and construction of waterproof layer: draining setting construction is carried out on pile 5 according to design requirement, in bottom surface
Layer 6 and sidewall surfaces layer 7 carry out waterproof layer 8 and construct.
(7) lay baseplate reinforcing bar net: arranging the transverse steel of basement bottom board, longitudinal reinforcement, vertical in bottom surface layer 6
Reinforcing bar and stirrup bind baseplate reinforcing bar net.
(8) lay exterior wall steel mesh: arranging the transverse steel of outer wall of basement on sidewall surfaces layer 7, longitudinal reinforcement, hang down
To reinforcing bar and stirrup, exterior wall steel mesh is bound.
(9) set up template: using sidewall surfaces layer 7 as exterior wall outboard template, template is separately set in inner side of outer wall, on pile
The lacing wire fixed form of arrangement constitutes outer wall template structure.
(10) casting concrete: to baseplate reinforcing bar net and exterior wall steel mesh casting concrete, 2 He of basement bottom board is built up respectively
Outer wall of basement 3.
(11) pile is reinforced: adding one layer of pile body reinforcing layer in 5 outer surface of pile.
(12) wet curing: wet curing is carried out according to design requirement.
(13) form removable: after concrete reaches design strength requirement, form removal completes the construction of the first block.
(14) construct the second block: the construction of 6-13 step is carried out to the second block；Third block is excavated, and carries out 1-4
Step construction；So it is sequentially completed subsequent block construction.
(15) each block engaging portion construction: the foundation pit earth's surface soil body upper berth between every two block sets rubber fastening band 9,
Expansion joint 10, setting and sturdy foam plastic in the expansion joint 10 above rubber fastening band 9 are set between basement bottom surface layer 6
Flitch 11；Rubber fastening band 9 is laid on the inside of foundation pit between two blocks on the soil body, between sidewall of basement superficial layer 7
Expansion joint 10 is set, setting and sturdy plastic foamboard in the expansion joint 10 in 9 outside of rubber fastening band.
(16) post-cast strip is reinforced in setting expansion: being arranged between the bottom plate 2 and bottom plate 2 of each block, between exterior wall 3 and exterior wall 3 swollen
Swollen reinforcement post-cast strip 4, to the construction of each block after, then between the bottom plate 2 and bottom plate 2 of each block, exterior wall 3 and exterior wall 3 it
Between carry out expansion and reinforce post empiricism, be laid with steel mesh, pour expansive concrete, complete basement jointless construction.
In order to reduce or even avoid bottom plate and exterior wall to shrink after pouring, the present invention also by above-mentioned steps (10) in adopted
Concrete is changed to using nonshrink concrete, and the nonshrink concrete is according to parts by weight by sulphate aluminium cement 3500-
4100 parts, sand 2500-2900 parts middle, 1540-1960 parts of flyash, 75-125 parts of methylcellulose, 5-9 parts of aluminum nitride powder, stone
40-60 parts of English powder mixings, then be equipped with 250-300 parts of swelling agent and be prepared；The wherein components by weight of the swelling agent are as follows: hard
19-21 parts of gypsum, 6-7 parts of magnesia, 7-8 parts of calcium oxide, 2-3 parts of tartaric acid, 4-5 parts of sodium metasilicate, 7-8 parts of sodium tripolyphosphate,
6-7 parts of sodium gluconate, 1-2 parts of sodium citrate；When preparing mortar, three steps of the parts by weight nonshrink concrete point are stirred,
1. being first uniformly mixed sulphate aluminium cement, middle sand, flyash, methylcellulose, aluminum nitride powder, 2500- is 2. added
2900 parts of water stir and evenly mix repeatedly, and swelling agent is 3. then added and is uniformly mixed, obtains nonshrink concrete mortar；It is this nonshrink
It joined methylcellulose in concrete, hydration reaction speed can be slowed down, slow down heat and generate speed；It is added in concrete
Aluminum nitride powder and silica flour, methylcellulose, aluminum nitride powder and silica flour can cooperate with reduction temperature rise, reduce and even avoid receiving
Contracting.
Above-mentioned steps (16) employed in expansive concrete can also be changed to use nonshrink concrete.
The floor length of each block of basement is 30-40m, and it is 1.5m that post-cast strip width is reinforced in the expansion.
The basement bottom board 2 with a thickness of 400mm, reinforcing bar is 16@150 of double-layer double-direction [HRB400] φ, outside basement
For wall 3 with a thickness of 250mm, reinforcing bar is 14@150 of double-layer double-direction [HRB400] φ, and the ratio of reinforcement is not less than 0.3%.
Claims (5)
1. Super-long Basement jointless structure construction method, it is characterised in that by Super-long Basement blockette, stage by stage it is continuous staggeredly
Construction successively carries out blockette shoveling, and blockette is completed foundation pit surface and poured, and blockette completes bottom slab concreting and exterior wall pours,
Post-cast strip is reinforced in setting expansion between block and block；Specifically include following construction procedure:
(1) excavate the first block: Super-long Basement being subjected to blockette shoveling and carries out slope retaining, complete the first block foundation pit
It excavates；
(2) arrange pile: setting-out being carried out according to the pile size that construction drawing gives, pile of arranging；
(3) bottom surface layer pours: the assembling reinforcement mesh sheet on the foundation pit earth's surface soil body, casting concrete mortar is then levelling, as
Basement bottom surface layer；
(4) sidewall surfaces layer pours: the assembling reinforcement mesh sheet on the soil body on the inside of the foundation pit, casting concrete mortar is then levelling, makees
For sidewall of basement superficial layer, and in advance using sidewall surfaces layer as face die plate on the outside of exterior wall；
(5) excavate the second block: the first block bottom surface layer and sidewall surfaces layer pour after finishing and stablizing, then excavate the secondth area
Block carries out the 1st, 2,3, the construction of 4 steps；
Continue to carry out following construction procedure to the first block:
(6) draining setting and construction of waterproof layer: carrying out draining setting construction according to design requirement on pile, in bottom surface layer and
Sidewall surfaces layer carries out construction of waterproof layer；
(7) lay baseplate reinforcing bar net: arranged in bottom surface layer the transverse steel of basement bottom board, longitudinal reinforcement, vertical reinforcing bar and
Stirrup binds baseplate reinforcing bar net；
(8) lay exterior wall steel mesh: arranging transverse steel, longitudinal reinforcement, the vertical reinforcing bar of outer wall of basement on sidewall surfaces layer
And stirrup, bind exterior wall steel mesh；
(9) set up template: using sidewall surfaces layer as exterior wall outboard template, template is separately set in inner side of outer wall, with what is arranged on pile
Lacing wire fixed form constitutes outer wall template structure；
(10) casting concrete: to baseplate reinforcing bar net and exterior wall steel mesh casting concrete, basement bottom board and underground are built up respectively
Room exterior wall；
(11) pile is reinforced: adding one layer of pile body reinforcing layer in pile outer surface；
(12) wet curing: wet curing is carried out according to design requirement；
(13) form removable: after concrete reaches design strength requirement, form removal completes the construction of the first block；
(14) construct the second block: the construction of 6-13 step is carried out to the second block；Third block is excavated, and carries out 1-4 step
Construction；So it is sequentially completed subsequent block construction；
(15) each block engaging portion construction: the foundation pit earth's surface soil body upper berth between every two block sets rubber fastening band, in underground
Expansion joint is set between the bottom surface layer of room, plastic foamboard is set in the expansion joint above rubber fastening band；In two blocks
Between foundation pit on the inside of be laid with rubber fastening band on the soil body, expansion joint is set between sidewall of basement superficial layer, is stopped in rubber
Plastic foamboard is set in the expansion joint on the outside of water band；
(16) post-cast strip is reinforced in setting expansion: between the bottom plate and bottom plate of each block, after setting expansion is reinforced between exterior wall and exterior wall
Pour band, to the construction of each block after, then between the bottom plate and bottom plate of each block, between exterior wall and exterior wall carry out expansion reinforcement
Post empiricism is laid with steel mesh, pours expansive concrete, completes basement jointless construction.
2. Super-long Basement jointless structure construction method according to claim 1, it is characterised in that step (10) employed in
Concrete be nonshrink concrete, the nonshrink concrete is according to parts by weight by 3500-4100 parts of sulphate aluminium cement, middle sand
2500-2900 parts, 1540-1960 parts of flyash, 75-125 parts of methylcellulose, 5-9 parts of aluminum nitride powder, 40-60 parts of silica flour
It mixes, then is equipped with 250-300 parts of swelling agent and is prepared；The wherein components by weight of the swelling agent are as follows: anhydrite 19-21
Part, 6-7 parts of magnesia, 7-8 parts of calcium oxide, 2-3 parts of tartaric acid, 4-5 parts of sodium metasilicate, 7-8 parts of sodium tripolyphosphate, sodium gluconate
6-7 parts, 1-2 parts of sodium citrate；When preparing mortar, by the parts by weight nonshrink concrete point three steps stirring, 1. first by sulphur
Aluminate cement, middle sand, flyash, methylcellulose, aluminum nitride powder and silica flour are uniformly mixed, and 2. add 2500-2900
Part water stirs and evenly mixs repeatedly, and swelling agent is 3. then added and is uniformly mixed, obtains nonshrink concrete mortar.
3. Super-long Basement jointless structure construction method according to claim 2, it is characterised in that step (16) employed in
Expansive concrete be changed to using nonshrink concrete.
4. Super-long Basement jointless structure construction method according to claim 3, it is characterised in that each block of basement
Floor length is 30-40m, and it is 1.5m that post-cast strip width is reinforced in the expansion.
5. Super-long Basement jointless structure construction method according to claim 4, it is characterised in that the basement bottom board
With a thickness of 400mm, reinforcing bar is 16@150 of double-layer double-direction [HRB400] φ, and for outer wall of basement with a thickness of 250mm, reinforcing bar is double-deck double
To 14@150 of [HRB400] φ, the ratio of reinforcement is not less than 0.3%.
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| CN107190849B (en) * | 2017-06-28 | 2019-07-19 | 中国华西企业股份有限公司 | The shear wall of floor prestressed stretch-draw effect of constraint value can be eliminated |
| CN111828041B (en) * | 2020-06-23 | 2022-06-24 | 中电建南方建设投资有限公司 | Underground long longitudinal structure concrete temperature stress anchoring system for subway |
| CN111809659A (en) * | 2020-06-23 | 2020-10-23 | 深圳市居安建筑科技有限公司 | Underground long longitudinal structure concrete shrinkage stress restraint system of subway |
| CN113216379B (en) * | 2021-05-25 | 2023-01-31 | 宜宾学院 | Basalt fiber concrete profiled steel structure |
| CN113719187B (en) * | 2021-08-21 | 2022-11-29 | 武汉点土石金环保科技有限公司 | Open-air archaeology grave excavation simulation display construction process and simulation grave |
| CN115434365B (en) * | 2022-09-22 | 2024-02-06 | 中国安能集团第二工程局有限公司 | Construction method of seamless structure of ultra-long basement |
| CN117605183B (en) * | 2024-01-23 | 2024-04-16 | 北京市建筑工程研究院有限责任公司 | Ultra-long concrete wall body with self-adaptive release of temperature stress |
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|---|---|---|---|---|
| DD258255A1 (en) * | 1987-03-06 | 1988-07-13 | Weimar Wasserbau | SEALING AND DECKWERK CONSTRUCTION IN NATURAL AND WATER CONSTRUCTION |
| CN103321257A (en) * | 2013-06-18 | 2013-09-25 | 浙江海天建设集团有限公司 | Anti-cracking seepage-proof construction method for ultra-long mass concrete structure basement |
| CN103485370A (en) * | 2013-09-24 | 2014-01-01 | 国网上海市电力公司 | Concrete construction control method for preventing harmful cracks of wallboard |
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2017
- 2017-03-07 CN CN201710132658.1A patent/CN106894446B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD258255A1 (en) * | 1987-03-06 | 1988-07-13 | Weimar Wasserbau | SEALING AND DECKWERK CONSTRUCTION IN NATURAL AND WATER CONSTRUCTION |
| CN103321257A (en) * | 2013-06-18 | 2013-09-25 | 浙江海天建设集团有限公司 | Anti-cracking seepage-proof construction method for ultra-long mass concrete structure basement |
| CN103485370A (en) * | 2013-09-24 | 2014-01-01 | 国网上海市电力公司 | Concrete construction control method for preventing harmful cracks of wallboard |
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