CN109594683B - Construction method and structure of ultra-long concrete wall - Google Patents
Construction method and structure of ultra-long concrete wall Download PDFInfo
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- CN109594683B CN109594683B CN201910047237.8A CN201910047237A CN109594683B CN 109594683 B CN109594683 B CN 109594683B CN 201910047237 A CN201910047237 A CN 201910047237A CN 109594683 B CN109594683 B CN 109594683B
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000012423 maintenance Methods 0.000 claims abstract description 4
- 239000011148 porous material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 5
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910001387 inorganic aluminate Inorganic materials 0.000 description 1
- 229910052920 inorganic sulfate Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
-
- 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
Abstract
The utility model provides a construction method and structure of overlength concrete wall, aim at overcoming the overlength concrete wall construction among the prior art, adopt the post-cast strip mode can't realize the structure from the waterproof effect, adopt the expansion reinforcing band construction, the difficult temperature difference crack that produces in the difficult control construction, the poor shortcoming of wall body whole infiltration prevention provides an overlength concrete wall's construction method, include the following steps: A. binding templates and reinforcing steel bar frames of the ultra-long concrete wall; B. uniformly distributing and inserting a group of PVC pipes in the steel bar frame, wherein the lengths of the PVC pipes are higher than the height of the wall body; C. selecting pouring positions of expansion reinforcing bands in the templates, and installing dense-hole steel wire meshes in the expansion reinforcing bands and outside the expansion reinforcing bands; D. pouring concrete; E. and after the maintenance of the ultra-long concrete wall body is completed, chiseling the part of the PVC pipe higher than the wall body, and grouting into the PVC pipe. Also provides a structure of the ultra-long concrete wall. The wall body is not easy to crack, has good anti-seepage performance and is suitable for being used when an ultra-long concrete wall body is poured.
Description
Technical Field
The invention relates to the field of building construction, in particular to construction of an ultra-long concrete wall.
Background
Along with the continuous upsizing of building structures, the problem of crack control of the ultra-long concrete wall body becomes a technical problem which has to be solved. In recent decades, expert scholars at home and abroad have conducted a great deal of theoretical discussion and practical work in this regard. The related technical means has gradually developed from the initial setting of permanent expansion joints to form a series of construction processes of setting post-cast strips, induction strips, expansion reinforcing strips and the like, but the construction joints are reserved after the construction of the post-cast strips is finished, the self-waterproof effect of the structural body cannot be realized, the protection cleaning of the post-cast strips and the rust removal difficulty of the reinforcing steel bars are high, the post-cast strips can be constructed after the shrinkage of concrete structures at two sides is stable, and the construction period is long. By adopting the expansion reinforcing band for construction, although no construction joint is generated, the self-waterproof effect is achieved, and shrinkage cracks generated in construction can be effectively controlled, but temperature difference cracks generated in construction are difficult to control.
Disclosure of Invention
The invention overcomes the defects that the self-waterproof effect of the structure cannot be realized by adopting a post-pouring strip mode and the construction of an expansion reinforcing strip is difficult to control temperature difference cracks generated in construction and the integral seepage-proofing effect of the wall is influenced although the self-waterproof effect is realized when the super-long concrete wall is constructed in the prior art, and provides a construction method of the super-long concrete wall and a structure of the super-long concrete wall.
The technical scheme adopted by the invention for realizing the first invention is as follows: a construction method of an ultra-long concrete wall body comprises the following steps:
A. binding a reinforcement frame of the ultra-long concrete wall according to design specifications;
B. b, uniformly distributing and inserting a group of PVC pipes in the steel bar frame in the step A, wherein the axial direction of the PVC pipes is the same as the height direction of the wall, the lengths of the PVC pipes are higher than the height of the wall, and binding and fixing the PVC pipes and the steel bar frame through steel wires;
C. b, selecting pouring positions of expansion reinforcing belts in the reinforced bar frame in the step A, installing dense-hole steel wire meshes on two sides of the expansion reinforcing belts, and supporting wall templates after the completion;
D. c, pouring concrete, namely pouring ordinary concrete firstly from one end of the wall body in sequence, and changing the ordinary concrete back to the expanded concrete when the expanded reinforcing belt in the step C is encountered, so that the pouring is continuous;
E. and C, after the maintenance of the ultra-long concrete wall body is completed, chiseling the part, higher than the wall body, of the PVC pipe in the step B, and grouting into the PVC pipe to seal and compact the holes of the PVC pipe.
Further, in the step B, a PVC pipe with the pipe diameter of 20mm is inserted into each position with the interval of 3m, when the width of the wall body is smaller than 500mm, a row of PVC pipes are arranged in the middle position, when the width of the wall body is 500mm-1000mm, two rows of PVC pipes are evenly arranged, and each time the width of the wall body is increased by 500mm, a row of PVC pipes is additionally arranged.
In the step B, PVC pipes are inserted into the corner parts of the wall body within the range of 500mm at the two ends.
Further, in the step B, the PVC pipe is 30mm higher than the wall body.
Further, in the step C, the dense-pore steel wire mesh is a steel wire mesh with the pore diameter of 5mm×5 mm.
The technical scheme adopted by the invention for realizing the second invention is as follows: the utility model provides an overlength concrete wall's structure, includes by ordinary concrete placement's ordinary wall body and by the expansion reinforcing strip wall body of expansion concrete placement, is equipped with the dense hole wire net that is used for the partition between ordinary wall body and the expansion reinforcing strip wall body, ordinary wall body and expansion reinforcing strip wall body in be equipped with the PVC pipe of a set of intraductal intussuseption concrete, the axis direction of PVC pipe is the same with the direction of height of wall body, the length of PVC pipe corresponds with the height of wall body.
Further, the pipe diameter of the PVC pipe is 20mm, a group of PVC pipes are evenly distributed at intervals of 3m, when the width of the wall body is smaller than 500mm, a row of PVC pipes are arranged at the middle position, when the width of the wall body is 500mm-1000mm, two rows of PVC pipes are evenly distributed, and each time the width of the wall body is increased by 500mm, a row of PVC pipes is additionally arranged.
Further, PVC pipes are arranged at the two ends of the corner of the wall within 500 mm.
Further, the dense-pore steel wire mesh is a steel wire mesh with the pore diameter of 5mm multiplied by 5 mm.
The beneficial effects of the invention are as follows: according to the invention, the expansion reinforcing belt is arranged in the ultra-long concrete wall body, the small-caliber PVC pipe is buried at the same time, a certain amount of prestress is generated in the concrete of the expansion reinforcing belt, and the tensile stress caused by concrete shrinkage, creep deformation and the like can be counteracted or partially counteracted, so that the crack resistance of the concrete is improved. The PVC pipe releases pre-compression stress absorbed in the earlier stage, so as to offset the temperature difference stress, and the inside of the structure body reaches a state of stress balance, so that the crack control principles of 'anti' and 'releasing' are fully and effectively applied. The method has the advantages of simple construction organization, short construction period, low cost and the like, effectively prevents the generation of cracks of the ultra-long concrete wall body, and ensures that the wall body has higher anti-seepage performance when being integrally cast and molded.
The invention is further described below with reference to the drawings and detailed description.
Drawings
Fig. 1 is a schematic structural diagram of the wall body according to the present invention.
Fig. 2 is a view in the direction a of fig. 1.
Fig. 3 is a schematic structural diagram of the wall body of the present invention after casting.
In the drawing, 1 is a common wall body, 2 is an expansion reinforcing belt wall body, 3 is a dense-pore steel wire mesh, and 4 is a PVC pipe.
Detailed Description
The construction method of the ultra-long concrete wall body comprises the following steps:
A. binding a reinforcement frame of the ultra-long concrete wall according to design specifications;
B. a, uniformly distributing and inserting a group of PVC pipes in the reinforcing steel bar frame in the step A, preferably, inserting a PVC pipe with the pipe diameter of 20mm at each position with a spacing of 3m, arranging a row of PVC pipes at the middle position when the width of the wall body is smaller than 500mm, uniformly distributing two rows of PVC pipes when the width of the wall body is 500mm-1000mm, adding a row of PVC pipes when the width of the wall body is increased by 500mm, inserting the PVC pipes in the corner position of the wall body within the range of 500mm at the two ends, wherein the axial direction of the PVC pipes is the same as the height direction of the wall body, the length of the PVC pipes is higher than the height of the wall body, and the preferred PVC pipes in the embodiment are higher than 30mm of the wall body and are bound and fixed with the reinforcing steel bar frame through steel wires;
C. b, selecting pouring positions of expansion reinforcing belts in the reinforcing bar frame in the step A, installing dense-hole steel wire nets on two sides of the expansion reinforcing belts, wherein the dense-hole steel wire nets are steel wire nets with the aperture of 5mm multiplied by 5mm, and are reinforced by arranging a vertical steel bar with phi 16mm according to 200mm-300mm, wherein concrete protective layers with the diameter not smaller than 25mm are reserved on the upper and lower sides of the steel wire nets, and the steel wire nets, adjacent horizontal steel bars and the vertical reinforcing steel bars are firmly fixed through binding or welding, and then the wall body template is erected after the steel wire nets are completed;
D. c, pouring concrete, namely pouring ordinary concrete firstly from one end of the wall body in sequence, and changing the ordinary concrete back to the expanded concrete when the expanded reinforcing belt in the step C is encountered, so that the pouring is continuous;
E. and C, chiseling out the part of the PVC pipe higher than the wall body in the step B after the maintenance of the ultra-long concrete wall body is completed, so that the PVC pipe is leveled with the wall body, and grouting is carried out in the PVC pipe to seal and compact the holes of the PVC pipe.
As shown in the drawings, the structure of the ultra-long concrete wall of the present embodiment includes a normal wall 1 cast from normal concrete and an expanded reinforcing strip wall 2 cast from expanded concrete. A dense-pore steel wire mesh 3 for separation is arranged between the common wall body 1 and the expansion reinforcing belt wall body 2. The dense wire mesh 3 preferred in this example is a wire mesh with a pore size of 5mm x 5 mm. The common wall body 1 and the expansion reinforcing belt wall body 2 are internally provided with a group of PVC pipes 4 filled with concrete. The preferred pipe diameter of PVC pipe of this embodiment is 20mm, and a set of PVC pipe interval 3m evenly distributes and sets up, when wall body width is less than 500mm, sets up one row of PVC pipe in the intermediate position, and when wall body width was 500mm-1000mm, evenly distributes two rows of PVC pipes, and every wall body width increases 500mm, adds one row of PVC pipe. For key positions such as wall corners, PVC pipes 4 are arranged within the range of 500mm at the two ends of the corner position of the wall, which is preferred in the embodiment. The axis direction of the PVC pipe 4 is the same as the height direction of the wall body, and the length of the PVC pipe 4 corresponds to the height of the wall body.
By arranging the expansion reinforcing belt and embedding the small-caliber PVC pipe in the ultra-long concrete wall, the crack control principle of 'anti' and 'releasing' is fully and effectively applied.
The expansion reinforcing belt is set as 'anti', and a novel concrete expansion additive is doped in the expansion reinforcing belt, and the main components of the additive are inorganic aluminate and sulfate, after hydration, expansion crystals, namely hydrated calcium sulfoaluminate, can be generated, and the product can fill capillary holes and slits in concrete, so that the compactness of the concrete is improved, the impermeability is improved, a certain amount of prestress is generated in the concrete, and the tensile stress caused by concrete shrinkage, creep and the like can be counteracted or partially counteracted, so that the crack resistance of the concrete is improved. In the early stage of concrete pouring, after the cement hydration heat is raised and expanded, tensile stress is generated in the cooling process, and when the cement reaches the expansion reinforcing belt part, the expansion reinforcing belt part stores larger free stress to compensate the expansion reinforcing belt part, so that the stress is reduced, and the concrete is ensured not to crack.
The embedded PVC pipe with small caliber is put, the consumption of the expansion reinforcing belt concrete is difficult to accurately calculate in practical engineering application, the prestress generated by the expansion reinforcing belt concrete in the later expansion is difficult to estimate, if the prestress is larger than the tensile stress generated by the shrinkage of common concrete, cracks are easily generated in the concrete structure, and the embedded PVC pipe can just effectively absorb the excessive prestress. In the later use of the ultra-long concrete structure, when the temperature difference stress is generated due to seasonal temperature drop, the PVC pipe can release the pre-compression stress absorbed in the earlier stage, so that the temperature difference stress is counteracted, and the inside of the structure body is in a stress balance state.
The invention provides a construction process for seamless construction and integral casting molding, which effectively prevents the crack of the ultra-long concrete wall body and improves the leakage resistance of the wall body.
Claims (5)
1. The construction method of the ultra-long concrete wall is characterized by comprising the following steps of:
A. binding a reinforcement frame of the ultra-long concrete wall according to design specifications;
B. b, uniformly distributing and inserting a group of PVC pipes in the steel bar frame in the step A, wherein the axial direction of the PVC pipes is the same as the height direction of the wall, the lengths of the PVC pipes are higher than the height of the wall, and binding and fixing the PVC pipes and the steel bar frame through steel wires;
C. b, selecting pouring positions of expansion reinforcing belts in the reinforced bar frame in the step A, installing dense-hole steel wire meshes on two sides of the expansion reinforcing belts, and supporting wall templates after the completion;
D. c, pouring concrete, namely pouring ordinary concrete firstly from one end of the wall body in sequence, and changing the ordinary concrete back to the expanded concrete when the expanded reinforcing belt in the step C is encountered, so that the pouring is continuous;
E. and C, after the maintenance of the ultra-long concrete wall body is completed, chiseling the part, higher than the wall body, of the PVC pipe in the step B, and grouting into the PVC pipe to seal and compact the holes of the PVC pipe.
2. The construction method of an ultra-long concrete wall according to claim 1, wherein in the step B, a PVC pipe with a pipe diameter of 20mm is inserted at each position with a spacing of 3m, when the width of the wall is less than 500mm, a row of PVC pipes is arranged at the middle position, when the width of the wall is 500mm-1000mm, two rows of PVC pipes are evenly arranged, and each time the width of the wall is increased by 500mm, a row of PVC pipes is additionally arranged.
3. The construction method of an ultra-long concrete wall according to claim 1, wherein in the step B, PVC pipes are inserted into the corner portions of the wall within 500mm of the ends.
4. The method for constructing an ultra-long concrete wall according to claim 1, wherein in the step B, the PVC pipe is 30mm higher than the wall.
5. The construction method of an ultra-long concrete wall according to claim 1, wherein in the step C, the dense-pore steel wire mesh is a steel wire mesh with a pore diameter of 5mm x 5 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910047237.8A CN109594683B (en) | 2019-01-18 | 2019-01-18 | Construction method and structure of ultra-long concrete wall |
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| CN201910047237.8A CN109594683B (en) | 2019-01-18 | 2019-01-18 | Construction method and structure of ultra-long concrete wall |
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| Publication Number | Publication Date |
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| CN109594683A CN109594683A (en) | 2019-04-09 |
| CN109594683B true CN109594683B (en) | 2024-04-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110670593B (en) * | 2019-10-16 | 2021-06-11 | 四川国恒建筑设计有限公司 | Method for solving stress of super-long structure |
| 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 |
| 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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| AU2003900295A0 (en) * | 2003-01-23 | 2003-02-06 | Onesteel Reinforcing Pty Ltd | A structural formwork member |
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