CN1195133C - Ordinary concrete block bunker-jump casting crack control method - Google Patents
Ordinary concrete block bunker-jump casting crack control method Download PDFInfo
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- CN1195133C CN1195133C CNB031168213A CN03116821A CN1195133C CN 1195133 C CN1195133 C CN 1195133C CN B031168213 A CNB031168213 A CN B031168213A CN 03116821 A CN03116821 A CN 03116821A CN 1195133 C CN1195133 C CN 1195133C
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Abstract
The present invention relates to an ordinary concrete casting crack control method for civil construction industry, particularly to an ordinary concrete block bunker-jump casting crack control method. A casting block is divided into a plurality of bunker-jump type first jump bunker blocks a and after jump bunker blocks b; the first jump bunker blocks a are cast; after the first jump bunker blocks a are initially condensed, the first jump bunker blocks a are cared; after the first jump bunker blocks a are cast for 5 to 15 days, the after jump bunker blocks b are cast; after the after jump bunker blocks b are initially condensed, the after jump bunker blocks b are cared; after a period of time, a mould is disassembled for continuous care; after the care, soil is filled back in time for reducing exposure time. Because the casting block is divided into the bunker-jump type first jump bunker blocks and the after jump bunker blocks and concrete proportioning ratio for casting and a slump method are strictly controlled simultaneously, the present invention solves the problems of structural crack control and seepage prevention for colossal and super-wide casting concrete on the spot. The present invention greatly saves engineering investment, provides convenient construction, and also ensures the integrity and the durability of an engineering structure.
Description
Technical field
The present invention relates to the method for controlling crack of civil construction industry, relate in particular to a kind of method of in the large-scale underground concrete structure construction of overlength, building the control crack with ordinary concrete.
Background technology
At present, in the concreting in industry and civilian construction field, the existence of building the back concrete structure crack is a suitable general phenomenon, crack itself can be divided into harmful crack and harmless crack, wherein harmful crack is meant the crack that can cause qualitative problems of construction (as: inner infiltration etc.), its existence meeting produces workmanship and quite seriously influences, therefore adopt following several method mostly in industry and the concreting in the civilian construction field, reach the purpose that reduces harmful crack.What domestic standard adopted is that the cast-in-place concrete structure regulation is provided with the shrinkage joint, the shrinkage joint maximum spacing is in 30m (under the indoor situation) scope, and in 20m (under the open-air situation) scope, between pour, reserve nonvolatil settlement joint simultaneously, and the ater-casting of width at 0.8-1.0m be set in the work progress, or apply measures such as prestressing force, control harmful crack, but these shrinkage joint, the reservation of settlement joint and ater-casting, produced some other problem again, can make work progress very loaded down with trivial details, also can reduce simultaneously the whole shock resistance of engineering, produce new crack weak part; The passive way of external " having split just stifled; block up incessantly just row " of adopting in this respect, generally around building, reserve the gutter of nonvolatil width at 0.5m, when the seepage phenomenon takes place, with chemical grouting water blocking to be lived, the gutter of just making good use of when leak stopping is invalid is concentrated and is effluxed, because these loss circulation material expense costlinesses, usually repeatedly for many years grouting treatment do not reach expected results yet, thereby make construction costs excessive, have a strong impact on the production function of use; Also has domestic and international building enterprise in order to reduce harmful crack, also adopt cellulose fibre to strengthen the method for special Admixtures such as concrete or SRA series additive, usually deal with improperly because of Admixture, anti-bigger seepage and the harmful crack of causing, simultaneously make that also construction costs is excessive, lack the market competitiveness.
Summary of the invention
The present invention has overcome in original civil construction in order to control harmful crack, makes concrete pouring construction complicated, and the excessive defective of cost again provides a kind of ordinary concrete piecemeal to jump the storehouse and built method for controlling crack simultaneously.Defectives such as method for controlling crack is built by adopting the method for jumping storehouse piece elder generation after-pouring in this ordinary concrete piecemeal jumping storehouse, and the construction that has solved original technology existence is complicated, and cost is excessive.
The present invention realizes like this, adopt the ordinary concrete piecemeal to jump the storehouse and build method for controlling crack, earthwork subregion excavation before concreting, overlay steel mesh reinforcement on the base plate that will build, behind the flat distributing bar of long all around wall water distribution, need are built the zone rationally be divided into several blockettes, again in blockette, it is divided into several jumps storehouse piece a and back jumping storehouse piece b earlier, jumping storehouse piece a earlier builds for jumping the storehouse formula with back jumping storehouse piece b, what promptly jump storehouse piece a earlier is that storehouse piece b is jumped in the back all around, and the back is jumped storehouse piece b and jumped storehouse piece a earlier; Implement to build with the concrete of optimizing match ratio to jumping storehouse piece a earlier then, after the initial set storehouse piece a that jumps earlier that has built is carried out maintenance, to jumping storehouse piece a maintenance earlier after 7-10 days, storehouse piece b is jumped in the back implement to build with the concrete of optimizing match ratio, after initial set, storehouse piece b is jumped in the back equally and carry out maintenance; The long wall that need are built is divided into jumping storehouse piece c and back jumping storehouse piece d earlier, implement to build with the concrete of optimizing match ratio to jumping storehouse piece c earlier then, after the initial set storehouse piece c that jumps earlier that has built is carried out maintenance, after to 7-10 days after jumping storehouse piece c builds earlier, storehouse piece d is jumped in the back implement to build, after initial set, storehouse piece d is jumped in the back equally and carry out maintenance with the concrete of optimizing match ratio; Form removal and continue maintenance after a period of time forms whole back backfill in time, reduces open-assembly time.
Above-mentioned a kind of ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack, and the length of pour is 20-40m.
Above-mentioned a kind of ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack, and the horizontal tectonics reinforcing bar of long all around wall configuration is minor diameter, highdensity horizontal reinforcement, and this horizontal reinforcement places the main muscle outside simultaneously.
Above-mentioned a kind of ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack, and building with every cube of cement consumption of ordinary concrete of optimizing match ratio is 290-340Kg, and the on-the-spot slump is 12 ± 2cm.
Above-mentioned a kind of ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack, and the concrete curing time after building is 15-25 days.
The present invention adopts and will jump the storehouse piece and be divided into and jump the storehouse formula and jump storehouse piece and jumping storehouse, back piece earlier, what promptly jump storehouse piece piece earlier is that the storehouse piece is jumped in the back all around, the back is to jump the storehouse piece earlier around jumping the storehouse piece, the method with the mix proportion and the slump is built in strict simultaneously control, do not staying permanent shrinkage joint, settlement joint and ater-casting, under the situation of no special material, the Crack Control and the antiseepage problem of ultra-large type cast-in-place concrete structure have been solved, make engineering construction not only simple, accelerating construction progress, and reduced the cost of engineering significantly.
Description of drawings
Fig. 1 jumps the storehouse for a kind of ordinary concrete piecemeal and builds method for controlling crack bottom slab concreting piecemeal schematic diagram, Fig. 2 builds the long wall of method for controlling crack for a kind of ordinary concrete piecemeal jumping storehouse and builds the piecemeal schematic diagram, and Fig. 3 jumps the storehouse for a kind of ordinary concrete piecemeal and builds the long wall horizontal reinforcement of method for controlling crack structural representation.
Wherein, 1 is the base plate reinforcing bar, and 2 is horizontal reinforcement.
The specific embodiment
The specific embodiment of the present invention provides in conjunction with the accompanying drawings.
Referring to Fig. 1, Fig. 2 and shown in Figure 3, a kind of ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack, earthwork subregion excavation before concreting, overlay base plate reinforcing bar 1 net on the base plate that will build, behind the flat distributing bar of long all around wall water distribution, need are built the zone rationally be divided into several blockettes, again in blockette, it is divided into several jumps storehouse piece a and back jumping storehouse piece b earlier, jumping storehouse piece a earlier builds for jumping the storehouse formula with back jumping storehouse piece b, what promptly jump storehouse piece a earlier is that storehouse piece b is jumped in the back all around, and the back is jumped storehouse piece b and jumped storehouse piece a earlier; Implement to build with the concrete of optimizing match ratio to jumping storehouse piece a earlier then, after the initial set storehouse piece a that jumps earlier that has built is carried out maintenance, to jumping storehouse piece a maintenance earlier after 7-10 days, storehouse piece b is jumped in the back implement to build with the concrete of optimizing match ratio, after initial set, storehouse piece b is jumped in the back equally and carry out maintenance; The long wall that need are built is divided into jumping storehouse piece c and back jumping storehouse piece d earlier, implement to build with the concrete of optimizing match ratio to jumping storehouse piece c earlier then, after the initial set storehouse piece c that jumps earlier that has built is carried out maintenance, after to 7-10 days after jumping storehouse piece c builds earlier, storehouse piece d is jumped in the back implement to build, after initial set, storehouse piece d is jumped in the back equally and carry out maintenance with the concrete of optimizing match ratio; Form removal and continue maintenance after a period of time forms whole back backfill in time, reduces open-assembly time.Below in conjunction with specific embodiment, the present invention is described in further detail, wherein embodiment 1-4 is the bottom slab concreting situation; Embodiment 5-8 builds situation for long wall; Embodiment 9-10 is base plate, long wall monobloc cast situation.
Embodiment 1: in spring, with normal silicate commercial concrete (cement consumption 338Kg/m
3), 40m*30m is jumped storehouse piece bottom slab concreting (thick 1.5m), the control internal-external temperature difference, plastic sheeting added the gunnysack covering curing after 5 days, built adjacent hop storehouse piece.Implementation result: do not find seepage, local adjacent construction is sewed with wet stain phenomenon;
Embodiment 2: in summer, with normal silicate commercial concrete (cement consumption 338Kg/m
3), 34m*36m is jumped storehouse piece bottom slab concreting (thick 1.5m), the control internal-external temperature difference, plastic sheeting added the gunnysack covering curing after 7 days, built adjacent hop storehouse piece.Implementation result: do not find seepage, do not have harmful crack, do not have wet stain phenomenon;
Embodiment 3: in summer, with normal silicate commercial concrete (cement consumption 338Kg/m
3), 34m*36m is jumped storehouse piece bottom slab concreting (thick 1.5m), the control internal-external temperature difference, plastic sheeting added the gunnysack covering curing after 10 days, built adjacent hop storehouse piece.Implementation result: do not find seepage, do not have harmful crack, do not have wet stain phenomenon;
Embodiment 4: in summer, with normal silicate commercial concrete (cement consumption 338Kg/m
3), 36m*30m is jumped storehouse piece bottom slab concreting (thick 1.5m), the control internal-external temperature difference, plastic sheeting added the gunnysack covering curing after 15 days, built adjacent hop storehouse piece.Implementation result: do not find seepage, do not have harmful crack, do not have wet stain phenomenon;
Embodiment 5: in summer, with normal silicate commercial concrete (cement consumption 338Kg/m
3), 28.8m*8m to be jumped Cang Kuaichangqiang build (thick 0.8m), the control internal-external temperature difference covered the maintenance of gunnysack band template outward after 5 days, built adjacent hop storehouse piece.Implementation result: do not find seepage, there is wet stain phenomenon the part;
Embodiment 6: in summer, with normal silicate commercial concrete (cement consumption 338Kg/m
3), 28.8m*8m to be jumped Cang Kuaichangqiang build (thick 0.8m), the control internal-external temperature difference covered the maintenance of gunnysack band template outward after 7 days, built adjacent hop storehouse piece.Implementation result: do not find seepage, do not have harmful crack, do not have wet stain phenomenon;
Embodiment 7: in summer, with normal silicate commercial concrete (cement consumption 338Kg/m
3), 28.8m*8m to be jumped Cang Kuaichangqiang build (thick 0.8m), the control internal-external temperature difference covered the maintenance of gunnysack band template outward after 10 days, built adjacent hop storehouse piece.Implementation result: do not find seepage, do not have harmful crack, do not have wet stain phenomenon;
Embodiment 8: in summer, with normal silicate commercial concrete (cement consumption 338Kg/m
3), 28.8m*8m to be jumped Cang Kuaichangqiang build (thick 0.8m), the control internal-external temperature difference covered the maintenance of gunnysack band template outward after 15 days, built adjacent hop storehouse piece.Implementation result: do not find seepage, do not have harmful crack, do not have wet stain phenomenon;
Embodiment 9: in spring, with normal silicate commercial concrete (cement consumption 338Kg/m
3), build dividing 17 jumping storehouse pieces to jump the storehouse, formed 374m*81m unsplit bed(-)plate (thick 1.5m) in 60 days, the control internal-external temperature difference, plastic sheeting added the gunnysack covering curing 25 days.Implementation result: do not find seepage, there is wet stain phenomenon adjacent constuction joint part, 2 places;
Embodiment 10: in spring, with normal silicate commercial concrete (cement consumption 338Kg/m
3), build dividing pieces jumping storehouse, 22 jumping storehouses, formed the whole long wall (thick 0.5m-0.8m) of 802m*8m in 30 days, the control internal-external temperature difference is with template to add the gunnysack covering curing 20 days, timely backfill earthing after the form removal.Implementation result: do not find seepage, 10 trickle external cracks (crack width is below 0.2mm, and length is at 1-4m) are arranged, the crack does not have obvious development, part self-healing, and there is wet stain phenomenon the part.
Use proof through reality, owing to the present invention has adopted overlength, super wide large-scale cast-in-place concrete structure are divided into jumping storehouse piece and jumping storehouse, back piece earlier, what promptly jump the storehouse piece earlier is that the storehouse piece is jumped in the back all around, the back is to jump the storehouse piece earlier around jumping the storehouse piece, the method with the mix proportion and the slump is built in strict simultaneously control, Crack Control and the antiseepage problem of overlength, super wide large-scale cast-in-place concrete structure have been solved, not only save construction investment, convenient construction greatly, also guaranteed the globality and the durability of engineering structures simultaneously.
Claims (5)
1, a kind of ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack, it is characterized in that the earthwork subregion excavation before concreting, overlay base plate reinforcing bar (1) net on the base plate that will build, behind the flat distributing bar of long all around wall water distribution, need are built the zone rationally be divided into several blockettes, again in blockette, it is divided into several jumps storehouse piece a and back jumping storehouse piece b earlier, jumping storehouse piece a earlier builds for jumping the storehouse formula with back jumping storehouse piece b, what promptly jump storehouse piece a earlier is that storehouse piece b is jumped in the back all around, and the back is jumped storehouse piece b and jumped storehouse piece a earlier; Implement to build with the concrete of optimizing match ratio to jumping storehouse piece a earlier then, after the initial set storehouse piece a that jumps earlier that has built is carried out maintenance, to jumping storehouse piece a maintenance earlier after 7-10 days, storehouse piece b is jumped in the back implement to build with the concrete of optimizing match ratio, after initial set, storehouse piece b is jumped in the back equally and carry out maintenance; The long wall that need are built is divided into jumping storehouse piece c and back jumping storehouse piece d earlier, implement to build with the concrete of optimizing match ratio to jumping storehouse piece c earlier then, after the initial set storehouse piece c that jumps earlier that has built is carried out maintenance, after to 7-10 days after jumping storehouse piece c builds earlier, storehouse piece d is jumped in the back implement to build, after initial set, storehouse piece d is jumped in the back equally and carry out maintenance with the concrete of optimizing match ratio; Form removal and continue maintenance after a period of time forms whole back backfill in time, reduces open-assembly time.
2, ordinary concrete piecemeal according to claim 1 is jumped the storehouse and is built method for controlling crack, and the length that it is characterized in that pour is 20-40m.
3, ordinary concrete piecemeal according to claim 1 is jumped the storehouse and is built method for controlling crack, and the horizontal tectonics reinforcing bar of long wall configuration is minor diameter, highdensity horizontal reinforcement (2) around it is characterized in that, this horizontal reinforcement (2) places the main muscle outside simultaneously.
4, ordinary concrete piecemeal according to claim 1 is jumped the storehouse and is built method for controlling crack, it is characterized in that every cube of cement consumption of ordinary concrete of building with optimizing match ratio is 290-340Kg, and the on-the-spot slump is 12 ± 2cm.
5, ordinary concrete piecemeal according to claim 1 is jumped the storehouse and is built method for controlling crack, and the concrete curing time after it is characterized in that building is 15-25 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031168213A CN1195133C (en) | 2003-05-08 | 2003-05-08 | Ordinary concrete block bunker-jump casting crack control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031168213A CN1195133C (en) | 2003-05-08 | 2003-05-08 | Ordinary concrete block bunker-jump casting crack control method |
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| CN1455054A CN1455054A (en) | 2003-11-12 |
| CN1195133C true CN1195133C (en) | 2005-03-30 |
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| CNB031168213A Expired - Fee Related CN1195133C (en) | 2003-05-08 | 2003-05-08 | Ordinary concrete block bunker-jump casting crack control method |
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| CN103485370B (en) * | 2013-09-24 | 2016-01-06 | 国网上海市电力公司 | A kind of concrete construction control method preventing wallboard harmful cracks |
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| CN103866789A (en) * | 2014-03-19 | 2014-06-18 | 重庆大学 | Control method for cracks generated during construction period of basement baseboard |
| CN104631664A (en) * | 2014-07-14 | 2015-05-20 | 中冶交通（沈阳）建设工程有限公司 | Construction method for controlling cracking of concrete wall |
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| CN106638544A (en) * | 2016-12-26 | 2017-05-10 | 中冶天工集团有限公司 | Anti-seepage and anti-cracking construction method for ultra-large reinforced concrete bio-oxidation pond in cold area |
| CN110761561A (en) * | 2019-10-18 | 2020-02-07 | 中铁八局集团第六工程有限公司 | Construction process of special concrete for compensating crack resistance |
| CN110847915A (en) * | 2019-11-07 | 2020-02-28 | 中铁建大桥工程局集团第五工程有限公司 | Construction process for jumping-cutting demolishing and subsection back-jacking of double-side-wall temporary support of shallow-buried fine sand layer |
| CN112282166A (en) * | 2020-09-25 | 2021-01-29 | 中国建筑第八工程局有限公司 | Construction method for jumping over warehouse with ultra-long concrete structure |
| CN114059654A (en) * | 2021-12-03 | 2022-02-18 | 河南沃克曼建设工程有限公司 | Rapid construction method for improved AAO biological pond chamber jumping method of sewage treatment station |
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Owner name: CHINA MCC20 GROUP CORP., LTD. Free format text: FORMER NAME: CHINA NO.20 METALLURGICAL CONSTRUCTION CO. |
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Address after: 201900 Shanghai city Baoshan District Pangu Road No. 777 Patentee after: CHINA MCC20 GROUP Corp.,Ltd. Address before: 201900 Shanghai city Baoshan District Pangu Road No. 777 Patentee before: 20TH METALLURG CONSTRUCTION Co. |
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Granted publication date: 20050330 |