CN1455054A - Ordinary concrete block bunker-jump casting crack control method - Google Patents

Ordinary concrete block bunker-jump casting crack control method Download PDF

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Publication number
CN1455054A
CN1455054A CN 03116821 CN03116821A CN1455054A CN 1455054 A CN1455054 A CN 1455054A CN 03116821 CN03116821 CN 03116821 CN 03116821 A CN03116821 A CN 03116821A CN 1455054 A CN1455054 A CN 1455054A
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China
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storehouse
jumped
piece
built
earlier
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CN 03116821
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Chinese (zh)
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CN1195133C (en
Inventor
李勇
王英俊
李炳伟
秦夏强
白艳霞
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中国第二十冶金建设公司
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Priority to CNB031168213A priority Critical patent/CN1195133C/en
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Abstract

The present invention relates to a crack control method for pouring large-area and super-width concrete by adopting block bin-skipping pouring process, which is characterized by that it adopts the following steps: dividing the pouring blocks into several bin-skipping type forward bin-skipping blocks and several rearward bin-skipping blocks, firstly pouring forward bin-skipping blocks, initial setting and curing, after 5-15 days pouring rearward bin-skipping blocks, initial setting and curing; after a period of time, removing mould and continuously curing and promptly back-filling earth to reduce exposed time. Said invention is convenient for construction, can resolve the crack control and impervious problem, and can ensure intengrality and durability of engineering structure.

Description

The ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack
Technical field
The present invention relates to civil construction industry ordinary concrete and build the method for using Crack Control.
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 is lived, block up and incessantly utilize this gutter draining, 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 5-15 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 5-15 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.
Method for controlling crack is built in above-mentioned a kind of ordinary concrete piecemeal jumping storehouse, and it is characterized in that jumping earlier storehouse piece a was the best with the blanking time that back jumping storehouse piece b builds with 7-10 days.
Above-mentioned a kind of ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack, and the length that it is characterized in that pour is 20-40m.
Above-mentioned a kind of ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack, after it is characterized in that striking time was controlled at 7 days.
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 wall configuration is minor diameter, highdensity horizontal reinforcement around it is characterized in that, 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, 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.
Above-mentioned a kind of ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack, after the initial set jumping storehouse piece of having built is carried out the measure that covered with plastic film and increase and decrease straw bag (or gunnysack) are adopted in maintenance, concrete internal-external temperature difference is controlled in 25 ℃ by this measure.
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 it is characterized in that building is 15-25 days.
Above-mentioned a kind of ordinary concrete piecemeal is jumped the storehouse and is built method for controlling crack, it is characterized in that highly higher long wall is built, and behind two parts, jumps the storehouse from the bottom piecemeal and builds about can being divided into, and then the top piecemeal is jumped the storehouse build.
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 5-15 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 5-15 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 to face mutually and jumped the storehouse piece.Implementation result: do not find seepage, the part is faced construction mutually and 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 to face mutually and jumped the 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 to face mutually and jumped the 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 to face mutually and jumped the 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 to face mutually and jumped the 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 to face mutually and jumped the 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 to face mutually and jumped the 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 to face mutually and jumped the 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, 2 places face the constuction joint part mutually wet stain phenomenon;
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 (9)

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 5-15 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 5-15 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, a kind of ordinary concrete piecemeal according to claim 1 is jumped the storehouse and is built method for controlling crack, it is characterized in that jumping earlier storehouse piece a and jumps storehouse piece b with the back and jump storehouse piece c and back earlier that to jump the blanking time that storehouse piece d builds be the best with 7-10 days.
3, a kind of ordinary concrete piecemeal according to claim 1 and 2 is jumped the storehouse and is built method for controlling crack, and the length that it is characterized in that pour is 20-40m.
4, a kind of ordinary concrete piecemeal according to claim 1 and 2 is jumped the storehouse and is built method for controlling crack, after it is characterized in that striking time was controlled at 7 days.
5, a kind of ordinary concrete piecemeal according to claim 1 and 2 is jumped the storehouse and is built method for controlling crack, 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.
6, a kind of ordinary concrete piecemeal according to claim 1 and 2 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.
7, a kind of ordinary concrete piecemeal according to claim 1 and 2 is jumped the storehouse and is built method for controlling crack, it is characterized in that after the initial set jumping storehouse piece of having built being carried out the measure that covered with plastic film and increase and decrease straw bag (or gunnysack) are adopted in maintenance, concrete internal-external temperature difference is controlled in 25 ℃ by this measure.
8, a kind of ordinary concrete piecemeal according to claim 1 and 2 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.
9, a kind of ordinary concrete piecemeal according to claim 1 and 2 is jumped the storehouse and is built method for controlling crack, it is characterized in that highly higher long wall is built, behind two parts, jump the storehouse from the bottom piecemeal and build about can being divided into, and then the top piecemeal is jumped the storehouse build.
CNB031168213A 2003-05-08 2003-05-08 Ordinary concrete block bunker-jump casting crack control method CN1195133C (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102155086A (en) * 2011-04-25 2011-08-17 巨石集团有限公司 Method for pouring house grade level
CN102758440A (en) * 2011-04-28 2012-10-31 成都中铁隆工程集团有限公司 Open-cut tunnel construction method
CN103225406A (en) * 2013-05-13 2013-07-31 中建五局第三建设有限公司 Seamless construction method of multi-layer super large-area reinforced concrete ground
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
CN103615007A (en) * 2013-12-12 2014-03-05 中国建筑第八工程局有限公司 Construction method for pouring basement exterior wall and bottom plate simultaneously
CN103866789A (en) * 2014-03-19 2014-06-18 重庆大学 Control method for cracks generated during construction period of basement baseboard
CN104481149A (en) * 2014-11-03 2015-04-01 中国建筑股份有限公司 Super-large plane concrete structure seamless construction method using low-temperature cabin supplement method
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
CN104963357A (en) * 2015-07-08 2015-10-07 中国十七冶集团有限公司 Large-area RC basement structure sequence construction method
CN105350651A (en) * 2014-08-18 2016-02-24 上海宝冶集团有限公司 Long-span steel truss-concrete composition roofing integral lifting method
CN106638998A (en) * 2016-10-17 2017-05-10 中国建筑第八工程局有限公司 Concrete vertical alternative bay construction method
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

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102155086A (en) * 2011-04-25 2011-08-17 巨石集团有限公司 Method for pouring house grade level
CN102758440A (en) * 2011-04-28 2012-10-31 成都中铁隆工程集团有限公司 Open-cut tunnel construction method
CN103225406A (en) * 2013-05-13 2013-07-31 中建五局第三建设有限公司 Seamless construction method of multi-layer super large-area reinforced concrete ground
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
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
CN103615007A (en) * 2013-12-12 2014-03-05 中国建筑第八工程局有限公司 Construction method for pouring basement exterior wall and bottom plate simultaneously
CN103615007B (en) * 2013-12-12 2015-09-09 中国建筑第八工程局有限公司 A kind of construction method of simultaneously building outer wall of basement and base plate
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
CN105350651A (en) * 2014-08-18 2016-02-24 上海宝冶集团有限公司 Long-span steel truss-concrete composition roofing integral lifting method
CN104481149A (en) * 2014-11-03 2015-04-01 中国建筑股份有限公司 Super-large plane concrete structure seamless construction method using low-temperature cabin supplement method
CN104481149B (en) * 2014-11-03 2017-06-06 中国建筑股份有限公司 Using the super plane concrete structure seamless construction method of low temperature variation call method
CN104963357A (en) * 2015-07-08 2015-10-07 中国十七冶集团有限公司 Large-area RC basement structure sequence construction method
CN106638998A (en) * 2016-10-17 2017-05-10 中国建筑第八工程局有限公司 Concrete vertical alternative bay construction method
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

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