CN106638544A - Anti-seepage and anti-cracking construction method for ultra-large reinforced concrete bio-oxidation pond in cold area - Google Patents
Anti-seepage and anti-cracking construction method for ultra-large reinforced concrete bio-oxidation pond in cold area Download PDFInfo
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- CN106638544A CN106638544A CN201611215686.1A CN201611215686A CN106638544A CN 106638544 A CN106638544 A CN 106638544A CN 201611215686 A CN201611215686 A CN 201611215686A CN 106638544 A CN106638544 A CN 106638544A
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- construction
- pond
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- wall
- oxidation pond
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
-
- 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
-
- 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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
-
- 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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6806—Waterstops
Abstract
The invention discloses an anti-seepage and anti-cracking construction method for an ultra-large reinforced concrete bio-oxidation pond in a cold area. The method includes the steps that 1) a foundation is treated through a replacement method suitable for a shallow layer soft soil layer and a nonuniform soil layer; 2) after foundation replacement is completed, a bottom plate is partitioned into regions, the length and width of each region do not exceed 40 m, and the bottom plate of the bio-oxidation pond is poured through a partition jump warehouse method; 3) a pond wall formwork is constructed; 4) construction of follow-up process is carried out, and finally overall construction of the bio-oxidation pond is completed. The whole foundation replacement method is adopted, the foundation settlement is changed to be flexible micro settlement, and meanwhile the degree of foundation deformation in the Alpine region is reduced; construction joints are arranged through the jump warehouse method, construction is carried out in stages, harmful cracks of concrete are effectively controlled, and the anti-cracking safety of an engineering is ensured; a water stop strip of a common wall bolt is enlarged, block pieces are arranged at the two ends of the bolt according to the width of the pond wall, the size errors of a reinforcement protective layer and the pond wall are ensured, and leakage is avoided.
Description
Technical field
The present invention relates to technical field of building construction, more particularly to a kind of cold district ultra-large type armored concrete biology
The construction method of oxidation pond seepage control and crack resistance.
Background technology
With the fast development of Environmental Protection in China industry and environmental improvement engineering, the construction power of macro-organism oxidation pond is increased
Degree, while also increasing the technical barriers such as impervious bad, thermal cracking many in large pool work progress.Agent on crack resistance of concrete
Oozing property is bad and shrinkage cracking is the principal element for affecting waterproof concrete structure performance and structure service life, it is different from
So under condition element, especially extremely frigid zones, anticracking, antiseepage difficulty are bigger by contrast.The patcher caused due to seepage
Make that difficulty is big, costly, success rate is low.
Under the conditions of current construction technology, larger cast-in-situ reinforced concrete pond does not set large-sized reinforced mixed with movement joint
Solidifying soil base plate, if temperature is higher during concreting, plus upper plate is thicker, and inside concrete heat of hydration temperature rise is larger, makes to mix
Solidifying soil internal temperature is higher.Work as concrete cooling, when internal moisture evaporation concrete produces larger contraction, be subject to ground under base plate
The constraint of base, edge is subject to the strong constraint of big rigidity, when preventing base plate from freely stretching, will occur very in base plate interior
Big shrinkage tensile stress, causes base plate to occur deeper, even crosscutting concern, makes structures percolating water, destroys structure
Globality, affects normally using for structures.
In Concrete Engineering Cracks Producing reason, due to deformation (humiture, deformation and expansion, differential settlement) reason
The crack of generation accounts for 80%, and the crack that external force reason is produced accounts for 20%.
Often there are Vertical Cracks in roomy thin-walled pond.Different in size, the width difference in crack, it is mutually discontinuous.General pool wall
Intermediate cracking is closeer, wider, in 0.5mm or so, after mostly occurring in construction period or enabling soon.Open type no-top plate pond,
Crack often occurs in pool wall top, in shape with wide top and narrow bottom.There is the larger collar tie beam of top board or rigidity, crack occurs in pool wall mostly
Portion, in the narrow prismatic shape in middle width two ends.Sometimes wall is shown as outer wide, narrow through crack and outer surface crack, cause in wall
Pool wall serious leakage water, harmfulness is very big.
The content of the invention
The purpose of the present invention is for technological deficiency present in prior art, there is provided a kind of cold district super large steel bar
The construction method of concrete bio-oxidation pond seepage control and crack resistance.
For this purpose, the present invention is employed the following technical solutions：
A kind of seepage control and crack resistance construction method of cold district ultra-large type armored concrete bio-oxidation pond, including following step
Suddenly,
1) with the groundsill treatment suitable for shallow poor subsoil layer and uneven soil layer；
2) after the completion of ground is changed and filled out, by base plate subregion, the length and width in each area is less than 40 meters, is jumped using subregion
Storehouse method carries out pouring for bio-oxidation pond base plate；
3) pond wall moulding board construction：After completing bio-oxidation pond bottom slab concreting, pond wall moulding board construction is carried out, in pool wall circumference side
To one construction joint is formed with, construction joint is apart from bio-oxidation pond base plate 600mm；Steel is set in pool wall body of wall at construction joint
Plate waterstop, when bottom plate is removed, first split bolt reservation of the steel plate water-stopping under band does not fracture, in pool wall
Most beneath a piece of template is supported during formwork；Adjacent pond wall moulding board leads nail and fixes temporarily using waste and old lath, upper and lower wooden model docking
Place spells folder and strengthens using short flitch, and steel pipe longitudinal direction back cord is placed from top to down, depending on placing density according to rigidity requirement, installs horizontal
To back cord, and fixed by split bolt and chevron card, finally, fasten split bolt, complete pond wall moulding board construction；
4) construction of subsequent handling is carried out, the integral construction of bio-oxidation pond is finally completed.
Wherein described subregion is jumped storehouse method and is comprised the following steps：
(1) rubber fastening band for being sized, shaping is manufactured according to the size in each area of base plate, rubber water-proof is utilized between each area
Band connection waterproof, adjacent waterstop heat connects in succession, makes the seam of waterstop smooth firmly, without breach, degumming phenomenon；
(2) by after the completion of the concreting in a region, it is ensured that waterstop not damaged, treat that the region completes to pour 7 days
After, carry out pouring for next adjacent area.
In above-mentioned steps (1), raw stock is placed between two joints of rubber fastening band, by electrothermal sulfurizing by adjacent rubber
Glue waterstop is connected；In step (2), the region to having separated carries out spacer block construction, placement layer by layer, global formation.
In one embodiment of the invention, the base areas of the bio-oxidation pond are 180530mmX 75500mm, will
The base plate is divided into 5X2 region, and adjacent two is interregional every pouring, and interval time is 7 days.When pouring, first can pour simultaneously
1st, 3,5,7,9 regions, interval pours the 2nd, 4,6,8,10 regions after 7 days, then simultaneously.First can also simultaneously pour the 1st,
5 regions, then the 2nd, 4 regions are poured, then simultaneously the 3rd, 7,9 regions are poured, it is last to pour the 6th, 8,10 areas simultaneously
Domain.
During construction, longitudinal and transverse back cord uses steel pipe, and increases the sealing piece width of wall-crossing opposite-drawing bolt, in pool wall both sides
Split bolt bar on fixed dam is installed.
Compared with prior art, the invention has the advantages that：
1st, by the construction method of the present invention, the technical requirements of pond no seepage and no leakage can be preferably reached, reduces and repair
The waste of the working-day claims and manpower and materials that bring, it is cost-effective.
2nd, the present invention using jump storehouse method arrange construction joint, constructed stage by stage, can effective control concrete harmful cracks,
Guarantee engineering anti-cracking safety.
3rd, the present invention integrally changes back-up sand method using ground, settlement of foundation form is changed into into flexible micro- sedimentation, while also dropping
The low degree of extremely frigid zones foundation deformations.
4th, in the present invention, in length and breadth back cord adopts steel pipe supporting module, can increase rigidity, and solution pool wall is too thin, reinforcing bar
Closeer, difficulty of vibrating and the easily problem of generation template deformation, are effectively reduced interior formwork, increase water-proof concrete
From close property.
5th, it is of the invention by common through-wall bolt to avoid seepage because formwork reinforcement needs many through-wall bolts
Sealing piece increase, bolt two ends press pool wall width setting catch, it is ensured that the scale error of cover to reinforcement and pool wall, so as to
Avoid seepage.
Description of the drawings
Fig. 1 is in the method for the present invention, to jump storehouse pouring construction structural representation；
Fig. 2 is bottom of pond, the template construction structural representation of pool wall in the method for the present invention；
Fig. 3 is the structural representation of the modified split bolt adopted in the method for the present invention.
In figure：
The 21. horizontal split bolts of steel pipe back cord 23. of longitudinal steel pipe back cord 22.
The split bolt bar of 31. fixed dam, 32. enlarged sealing piece 33.
Specific embodiment
Below in conjunction with the accompanying drawings the construction method of the present invention is described in detail with specific embodiment.
The seepage control and crack resistance construction method of the cold district ultra-large type armored concrete bio-oxidation pond of the present invention includes following
Step：
1) with the groundsill treatment suitable for shallow poor subsoil layer and uneven soil layer：
By taking the basement process process of a subregion as an example, earth excavation to the bearing stratum for meeting design requirement, by substrate
Carry out changing after cleaning filling out, Con trolling index is filled out by calculating the limit value for changing the thickness and width filled out and being used as to change, by scene
Test determines the optimum moisture content and maximum dry density of changing back-up sand for using, it is ensured that grinding compacting, reaches compacting factor.
2) after the completion of basement process, pouring for pond baseboard concrete is carried out using storehouse method is jumped, first (divides base plate subregion
Section), the length and width in each area is less than 40 meters, is mixed by spacer block construction, placement layer by layer and global formation after segmentation
Solidifying native pours.
By taking the embodiment of Fig. 1 as an example, base plate that can be by area for 180530mm X 75500mm is divided into 5X2 area, often
The length and width in individual area is less than 40 meters.In figure, every pouring, interval time is 7 days in adjacent two interval.Can be according to progress
Arrange, it is determined that order is specifically poured, for example：Can pour simultaneously the 1st in figure, 3,5,7,9th area, interval is after 7 days, then pours simultaneously
Build the 2nd in figure, 4,6,8,10th area；First the 1st, 5th area can also be poured simultaneously, then pour the 2nd, 4th area, then pour the 3rd simultaneously, 7,
9th area, it is last pour the 6th simultaneously, 8,10th area.Can with meet spacer block construction under conditions of, suitably sequentially pour by other.
Rubber fastening band is set between adjacent twoth area, to prevent Seepage.Rubber fastening band is according to each area
Size is sized, patterning process, and the rubber fastening band in each area is connect in succession using shaper heat.By the concreting in an area
After the completion of, check waterstop, it is ensured that its not damaged, after Dai Gai areas complete to pour 7 days, carry out pouring for next adjacent region.
3) after the completion of bottom slab concreting, pool wall reinforcing bar colligation is carried out, pond wall moulding board installation is carried out after the completion of colligation.
It is biological in order to improve the surface quality of wooden model and using degree by taking the model sheetinstallat in an area as an example referring to Fig. 2
The construction of oxidation pond pond wall moulding board using 48*3.5mm steel pipes as back cord, to ensure concrete in real outer light, effectively reduce coagulation
Native blibbing, increases water-proof concrete from close property.The present invention is optimized to traditional handicraft, i.e.,：Pouring biological oxidation
During bottom of pond plate, one construction joint is formed with pool wall circumferencial direction, construction joint indwelling position is at base plate 600mm, in construction
Steel plate water stopper is set in the pool wall body of wall at seam.When bottom plate is removed, first split bolt of steel plate water-stopping under band is protected
Stay and do not fracture, be used for supporting lowermost a piece of template in pool wall formwork, up and down adjacent forms are led using waste and old lath
Nail is interim fixed, and upper and lower wooden model joint is spelled folder and strengthened using short flitch, and longitudinal back cord 21 is placed from top to down, places density root
Determine according to rigidity requirement calculating, horizontal back cord 22 is installed and is fixed by split bolt and chevron card, finally fasten split bolt
23, complete pond wall moulding board construction.After the completion of pond wall moulding board construction, the construction of subsequent handling is carried out, be finally completed bio-oxidation pond
Integral construction.
Referring to Fig. 3, due to oxidation pond waterproof requirement it is higher, and for thin-wall construction, so the present invention increases split bolt
The width of 23 sealing piece 32.Because through-wall bolt may cause leakage hidden trouble, sealing piece width is increased, can be better ensured that
Its stagnant water effect.In addition, install fixed dam 31 additional in the split bolt bar 33 of pool wall both sides, to control protective layer thickness and cut
Face size, prevents to produce infiltration phenomenon at split bolt.
Claims (9)
1. a kind of seepage control and crack resistance construction method of cold district ultra-large type armored concrete bio-oxidation pond, comprises the following steps,
1) with the groundsill treatment suitable for shallow poor subsoil layer and uneven soil layer；
2) after the completion of ground is changed and filled out, by base plate subregion, the length and width in each area is less than 40 meters, using subregion storehouse method is jumped
Carry out pouring for bio-oxidation pond base plate；
3) pond wall moulding board construction：After completing bio-oxidation pond bottom slab concreting, pond wall moulding board construction is carried out, in pool wall circumferencial direction shape
Into there is one construction joint, steel plate water stopper is set in the pool wall body of wall at construction joint, when bottom plate is removed, the steel plate
First split bolt retains and does not fracture under waterstop, for supporting most beneath a piece of template in pool wall formwork；Adjacent pond
Wall form leads nail and fixes temporarily using waste and old lath, and upper and lower wooden model joint spells folder reinforcement using short flitch, places from top to down
Steel pipe longitudinal direction back cord, depending on placing density according to rigidity requirement, installs horizontal back cord, and is fixed by split bolt and chevron
It is fixed, finally, split bolt is fastened, complete pond wall moulding board construction；
4) construction of subsequent handling is carried out, the integral construction of bio-oxidation pond is finally completed.
2. seepage control and crack resistance construction method according to claim 1, it is characterised in that the subregion jumps storehouse method includes following step
Suddenly：
(1) rubber fastening band for being sized, shaping is manufactured according to the size in each area of base plate, is connected using rubber fastening band between each area
Water is taken over control, adjacent waterstop heat connects in succession, make the seam of waterstop smooth firmly, without breach, degumming phenomenon；
(2) by after the completion of the concreting in a region, it is ensured that waterstop not damaged, after the region completes to pour 7 days,
Carry out pouring for next adjacent area.
3. seepage control and crack resistance construction method according to claim 2, it is characterised in that：In step (1), raw stock is placed in into rubber
Between two joints of glue waterstop, adjacent rubber fastening band is connected by electrothermal sulfurizing.
4. seepage control and crack resistance construction method according to claim 2, it is characterised in that：In step (2), to the region for having separated
Carry out spacer block construction, placement layer by layer, global formation.
5. seepage control and crack resistance construction method according to claim 4, it is characterised in that：The base areas of the bio-oxidation pond
For 180530mmX 75500mm, the base plate is divided into into 5X2 region, adjacent two is interregional every pouring, and interval time is 7 days.
6. seepage control and crack resistance construction method according to claim 5, it is characterised in that：First pour the 1st, 3,5,7,9 simultaneously
Region, interval pours the 2nd, 4,6,8,10 regions after 7 days, then simultaneously.
7. seepage control and crack resistance construction method according to claim 5, it is characterised in that：First simultaneously the 1st, 5 regions are poured, then
The 2nd, 4 regions are poured, then the 3rd, 7,9 regions is poured simultaneously, it is last to pour the 6th, 8,10 regions simultaneously.
8. the seepage control and crack resistance construction method according to any one of claim 1-7, it is characterised in that：During construction, the longitudinal and transverse back of the body
It is stupefied to use steel pipe, and the sealing piece width of wall-crossing opposite-drawing bolt is increased, it is provided with the split bolt bar of pool wall both sides solid
Determine baffle plate.
9. seepage control and crack resistance construction method according to claim 8, it is characterised in that：The construction joint is apart from bio-oxidation pond
Base plate 600mm.
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|---|---|---|---|
| CN201611215686.1A CN106638544A (en) | 2016-12-26 | 2016-12-26 | Anti-seepage and anti-cracking construction method for ultra-large reinforced concrete bio-oxidation pond in cold area |
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| CN201611215686.1A CN106638544A (en) | 2016-12-26 | 2016-12-26 | Anti-seepage and anti-cracking construction method for ultra-large reinforced concrete bio-oxidation pond in cold area |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109740278A (en) * | 2019-01-14 | 2019-05-10 | 青岛理工大学 | A kind of Bracking-resistant method in the construction of top Overlong Concrete Structure |
| CN111911227A (en) * | 2020-07-16 | 2020-11-10 | 四川省交通勘察设计研究院有限公司 | Exploration design method for seasonal frozen soil highway tunnel |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109740278A (en) * | 2019-01-14 | 2019-05-10 | 青岛理工大学 | A kind of Bracking-resistant method in the construction of top Overlong Concrete Structure |
| CN109740278B (en) * | 2019-01-14 | 2022-11-11 | 青岛理工大学 | Anti-cracking method for construction of upper ultra-long concrete structure |
| CN111911227A (en) * | 2020-07-16 | 2020-11-10 | 四川省交通勘察设计研究院有限公司 | Exploration design method for seasonal frozen soil highway tunnel |
| 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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