CN111379418A - Overlong concrete structure without seams and construction method thereof - Google Patents
Overlong concrete structure without seams and construction method thereof Download PDFInfo
- Publication number
- CN111379418A CN111379418A CN202010219141.8A CN202010219141A CN111379418A CN 111379418 A CN111379418 A CN 111379418A CN 202010219141 A CN202010219141 A CN 202010219141A CN 111379418 A CN111379418 A CN 111379418A
- Authority
- CN
- China
- Prior art keywords
- concrete
- rubber
- reinforcing belt
- steel
- reinforcing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
-
- 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
- E04B1/16—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
-
- 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
- E04B1/6801—Fillings therefor
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention discloses a super-long concrete structure without seams and a construction method thereof, wherein the super-long concrete structure without seams and the construction method thereof comprise concrete pre-pouring sections which are poured and formed on two sides, and reinforcing belts which are poured and formed between the concrete pre-pouring sections on the two sides; the steel reinforcement cages are arranged in the concrete pre-pouring section, a plurality of horizontal temperature steel reinforcements are arranged at the upper parts of the two steel reinforcement cages through steel wire frames, two ends of each horizontal temperature steel reinforcement are poured in the concrete pre-pouring section, and the rest parts of the horizontal temperature steel reinforcements are poured in the reinforcing belts; adding a high-efficiency expanding agent accounting for 12-13% of the mass of the used concrete into the reinforcing belt; the upper end surface of the reinforcing belt is provided with a deformation groove along the extension direction of the reinforcing belt, and the inside of the deformation groove is filled with a filling agent. The invention has the effect of making the probability of the high expansion concrete open lower when the pre-compressive stress generated by the high expansion concrete is larger than the shrinkage tensile stress generated by the concrete in the hardening process.
Description
Technical Field
The invention relates to the technical field of concrete structures, in particular to an overlong concrete structure without seams and a construction method thereof.
Background
Currently, in normal use of a concrete structure, a concrete material has a shrinkage creep property, so that a plurality of micro cracks are generated in the concrete structure. For very long concrete structures, such cracks due to shrinkage creep are more pronounced and difficult to control.
The methods used at present are the following:
firstly, a construction expansion post-cast strip is arranged, and the construction post-cast strip technology realizes a seepage prevention control technology for reducing shrinkage cracks (uncontrolled settlement property) generated by the temperature (humidity) difference stress action of concrete in the construction period. Because the two factors of the constraint and the length of the structural member are very sensitive to the temperature (humidity) difference effect, the post-cast strip can effectively reduce the constraint of the structural member in the concrete pouring construction, particularly the influence of the length on the effect, and the purpose of eliminating most of shrinkage cracks can be achieved as long as the stress value of the structural concrete superposed by the temperature (humidity) difference effect and the shrinkage stress in the construction period is smaller than the tensile strength of the concrete before and after the post-cast strip is poured, so that the arrangement of the expansion joints is reduced or cancelled.
Second, the reinforcing tape replaces the post-cast tape technique. The seamless design construction of the existing concrete structure mainly refers to a new technology for continuously casting an ultra-long concrete structure by taking compensation shrinkage concrete doped with an expanding agent as a structural material and replacing a post-cast strip with a reinforcing strip from the viewpoint of improving material performance and construction technical measures, wherein a post-cast reinforcing strip is usually arranged when the length of the structure is about 60 meters, the bandwidth is 2 meters, concrete doped with a large amount of the expanding agent is adopted in the post-cast reinforcing strip, the concrete strength grade is higher than that of the concrete outside the strip by more than 5MPa, and the reinforcement amount of a reinforcing steel bar in the post-cast reinforcing strip is properly increased.
At present, chinese utility model patent that publication number is CN202031183U discloses a floor intermittent type formula strengthening band structure sets up high expansion ratio concrete strengthening band between the low expansion ratio concrete of both sides, its characterized in that: a fast and easy closing net and a deformation groove are arranged on a joint of the low-expansion-rate concrete and the high-expansion-rate concrete reinforcing band on one side, a rubber water stop strip is embedded in the deformation groove, and reinforcing ribs are arranged in the low-expansion-rate concrete and the high-expansion-rate concrete reinforcing band.
The above prior art solutions have the following drawbacks: when the concrete is used, the low-expansion-rate concrete is poured on two sides, and then the high-expansion-rate concrete is poured between the low-expansion-rate concretes on the two sides. Because the expansion coefficient of the high-expansion-rate concrete is related to the temperature during construction and the pouring area and time, if the compressive pre-stress generated by the high-expansion-rate concrete is greater than the compressive shrinkage tensile stress generated by the concrete in the hardening process, the surface of the high-expansion-rate concrete cracks.
Disclosure of Invention
The invention aims to provide an ultralong concrete structure without seams and a construction method thereof, wherein the construction method comprises the following steps:
the invention aims at: the overlong concrete structure without seams is provided, and when the compressive pre-stress generated by the high-expansion concrete is larger than the compressive tensile stress generated by the concrete in the hardening process, the probability of the high-expansion concrete is lower.
The second purpose of the invention is that: a construction method of an overlong concrete structure without seams is provided, which can evacuate the pre-stress generated by the action of high-expansion concrete in the construction process and reduce the condition that cracks are generated due to the deformation of the subsequent high-expansion concrete.
The invention aims to be realized by the following technical scheme: a concrete structure without seam in overlength and its construction method, including pouring the concrete precast section that is shaped in advance on both sides, pour the reinforcement band shaped in advance between concrete cast sections of both sides; the steel reinforcement cages are arranged in the concrete pre-pouring section, a plurality of horizontal temperature steel reinforcements are arranged at the upper parts of the two steel reinforcement cages through steel wire frames, two ends of each horizontal temperature steel reinforcement are poured in the concrete pre-pouring section, and the rest parts of the horizontal temperature steel reinforcements are poured in the reinforcing belts; a high-efficiency expanding agent accounting for 12-13% of the mass of the used concrete is added into the reinforcing belt; the upper end surface of the reinforcing belt is provided with a deformation groove along the extension direction of the reinforcing belt, and a filling agent is filled in the deformation groove.
By adopting the technical scheme, the concrete pre-pouring sections on the two sides are poured firstly, then the reinforcing belt is poured, a high-efficiency expanding agent is added into the reinforcing belt when the reinforcing belt is poured, and the shrinkage tensile stress is generated when the reinforcing belt is hardened. When the pre-stress generated by the reinforcing belt is greater than the shrinkage tensile stress, the redundant pre-stress of the reinforcing belt is gathered in the deformation groove and is discharged outwards from the deformation groove, at the moment, if a crack occurs, the crack only occurs on the inner wall of the deformation groove, and after the subsequent reinforcing belt is formed, the shrinkage tensile stress temperature of the reinforcing belt at the moment is at last filled with the filling agent in the deformation groove. When the compressive pre-stress generated by the high-expansion concrete is larger than the compressive tensile stress generated by the concrete in the hardening process, the probability of cracking of the high-expansion concrete is lower.
The present invention in a preferred example may be further configured to: the upper part of the reinforcing belt is provided with a plurality of forming parts at intervals along the extending direction of the reinforcing belt, and the forming parts comprise placing frames which are placed on the upper part of the reinforcing belt and used for forming the deformed grooves.
By adopting the technical scheme, when the reinforcing belt is not solidified, the forming piece is placed on the upper part of the reinforcing belt, and the redundant concrete for forming the reinforcing belt is taken out; the arrangement of the forming part facilitates the upper part forming deformation groove of the reinforcing belt.
The present invention in a preferred example may be further configured to: the side wall of placing the frame is spaced apart and is equipped with first through-hole, places frame internally mounted and has the frame of placing relatively and can carry out pivoted rotor, and the second through-hole has been seted up at the lateral wall interval of rotor, the second through-hole with place the lateral wall alignment of frame.
By adopting the technical scheme, the use is divided into two steps, the rotating body and the placing frame are synchronously placed on the upper end surface of the deformation belt in the first step, and the second through cylinder on the rotating body is abutted against the side wall of the placing frame; and the second part rotates the rotating body after the deformation groove is formed, the second through hole is communicated with the first through hole, and the pre-stress released in the reinforcing belt can escape from the first through hole and the second through hole.
The present invention in a preferred example may be further configured to: an air bag body is arranged in the rotating body.
Through adopting above-mentioned technical scheme, because the inconvenient deformation condition who drives to strengthening of constructor implements the control, so place the gasbag body in the inside of rotor, if the strengthening band takes place the inflation because the prestressing stress of temperature reason and self, the gasbag body just can take place to swell this moment, because the gasbag body takes place to warp, makes things convenient for the staff to observe.
The present invention in a preferred example may be further configured to: the upper end face of the reinforcing belt is provided with a transparent box body which is covered on the upper part of the air bag body, a plastic particle layer is arranged in the transparent box body, and the upper end face of the plastic particle layer is higher than the upper end face of the air bag body.
By adopting the technical scheme, when the deformation amount of the deformation belt is small, the efficiency of the staff for observing through naked eyes is low, and the transparent box body and the plastic particle layer are arranged; when gaseous emergence inflation, the gasbag body takes place to warp this moment, with the upwards jack-up of plastic particle layer, the staff observes the highly variable quantity that can know the gasbag body of plastic particle layer. In order to observe the inflation of the airbag body completely, the upper end surface of the plastic particle layer needs to be higher than the upper end surface of the airbag body.
The present invention in a preferred example may be further configured to: and when the concrete precast sections on the two sides are formed, the rubber inflatable bodies are used for separation.
Through adopting above-mentioned technical scheme, because two concrete pour in advance between the section need leave the gap of pouring the strengthening band, need adopt the rubber inflation body to separate, adopt the rubber inflation body to separate moreover, carry out the gassing back with the rubber inflation body, make things convenient for the rubber inflation body to separate with the wire net, can be quick withdraw the rubber inflation body.
The present invention in a preferred example may be further configured to: the rubber inflatable body comprises a first rubber body extending horizontally, a plurality of separating bodies are mounted on the upper end face of the first rubber body, and the horizontal temperature steel bar is located between the two separating bodies.
Through adopting above-mentioned technical scheme, because two concrete are poured in advance and are provided with the horizontal temperature reinforcing bar between the section, because the rubber inflation body needs support the horizontal temperature reinforcing bar, so set up the division body on the upper portion of rubber inflation body, the setting of division body moreover for the fashioned up end of concrete is poured section in advance and is higher than the horizontal temperature reinforcing bar, need not add the template in addition.
The present invention in a preferred example may be further configured to: two the extension plate is all installed in the upper portion intercommunication of separating the body, and two adjacent extension plate butts are connected.
Through adopting above-mentioned technical scheme, because the up end of concrete precast section need leave some gaps apart from the horizontal temperature reinforcing bar, so install the extension plate in the upper portion intercommunication of division body, the up end of concrete precast section this moment can with the extension plate parallel and level.
The present invention in a preferred example may be further configured to: two the relative one side of rubber inflation body all communicates and is provided with a plurality of horizontal pipes of aerifing, it is violently managed the lateral wall butt of free tip and the adjacent first rubber body to aerify.
Through adopting above-mentioned technical scheme, during the use, place the rubber inflation body earlier, then install the horizontal temperature reinforcing bar, during staff's installation horizontal temperature reinforcing bar, need stand between two rubber inflation bodies, place the unstability between two rubber inflation bodies this moment, so be provided with and aerify violently the pipe, aerify violently the pipe and be used for supporting between two rubber inflation bodies, make the rubber inflation body and adjacent wire net be connected closely.
The second aim of the invention is realized by the following technical scheme: a construction method of an ultralong concrete structure without seams comprises the following steps of S1, manufacturing a reinforcement cage: the reinforcement cage for forming the interior of the concrete precast section is formed by combining two vertically-arranged and horizontally-extending reinforcement net plates and supporting reinforcements, wherein the reinforcement net plates are formed by binding a plurality of transverse and longitudinal reinforcements through steel wires; the steel bar net plate at the bottom is placed firstly, then the supporting steel bars are tied up at the upper part of the steel bar net plate through steel wires, and then the steel bar net plate at the top is tied up at the upper part of the supporting steel bars.
S2, installing a steel wire mesh: and the steel wire meshes are respectively arranged on one sides of the two opposite steel reinforcement cages, and the height of each steel reinforcement mesh is higher than that of each steel reinforcement cage.
S3, installing a rubber inflating body: two rubber inflatable bodies are placed between the two steel wire meshes, then the rubber inflatable bodies are inflated, one side, back to back, of each rubber inflatable body is respectively abutted against the adjacent steel wire meshes, and the inflatable transverse pipe is located between the two first rubber bodies.
S4, installing horizontal temperature steel bars: the horizontal temperature reinforcing steel bar vertically penetrates through the two extension plates downwards to be placed between the two partition bodies, the horizontal temperature reinforcing steel bar is erected on the upper portions of the two reinforcing steel bar cages, then the horizontal temperature reinforcing steel bar is tied on the upper portions of the reinforcing steel bar cages through the steel wires, the horizontal temperature reinforcing steel bar is located on the upper portion of the first rubber body and located between the two partition bodies, and the extension plates are located on the upper portions of the horizontal temperature reinforcing steel bar.
S5, pouring concrete and pouring a section in advance: 8 to 10 percent of high-efficiency expanding agent which is equivalent to replace cement is added into the concrete used for casting the concrete precast section.
S6, recycling rubber inflation bodies: and releasing the gas in the rubber inflatable body, and taking out the rubber inflatable body from the two steel wire meshes.
S7, processing the opposite side walls of the concrete precast section: and punching the opposite sides of the two concrete precast sections by a punching machine to form uneven chiseling surfaces.
S8, pouring a reinforcing belt: pouring concrete with the addition of high-efficiency expanding agent with the addition amount of 12% -13% (equivalent replacement cement) between the two steel wire meshes, and gradually pouring the concrete of the reinforcing belt layer by layer from the center of the reinforcing belt to the outer side of the reinforcing belt.
S9, forming a deformation groove: the rotating body is installed inside the placing frame, then the second through hole in the upper portion of the rotating body is rotated to the inner side wall of the placing frame, the placing frame is placed on the upper portion of the reinforcing belt, and the redundant concrete is taken out.
S10, rotating the rotating body: so that the second through hole is communicated with the first through hole, and the outer side wall of the air bag body is abutted against the elastic gauze.
S11, observing the air sac body: and observing the expansion condition of the air bag body, and further judging the contraction condition of the reinforcing belt.
S12, taking down the formed part and pouring a filling agent: the placing frame is taken out from the deformation groove, and then the filler is filled in the deformation groove.
By adopting the technical scheme, the construction method comprises the specific steps of manufacturing a steel reinforcement cage, installing a steel wire mesh, installing a rubber inflatable body, installing horizontal temperature steel bars, pouring a concrete pre-pouring section, recycling the rubber inflatable body, treating the side wall opposite to the concrete pre-pouring section, pouring a reinforcing belt, forming a deformation groove, rotating the rotating body, observing an air bag body, taking down a formed part and pouring a filler. When the pre-stress is larger than the shrinkage tensile stress generated by concrete hardening, the non-local discharged pre-stress is discharged from the inside of the deformation groove, cracks can possibly occur on the inner side wall of the deformation groove, but the probability of the surface of the reinforcement belt splitting is reduced, so that the surface of the reinforcement belt is smooth; meanwhile, the reinforcing belt is likely to expand due to the construction temperature and the pre-stress generated by the reinforcing belt in the construction process, and the expansion condition of the air bag body can be observed by observing the transparent box body and the plastic particle layer, so that the expansion condition of the reinforcing belt can be known.
1. The deformation groove is arranged, so that the compressive pre-stress generated by the high-expansion concrete is greater than the compressive and tensile shrinkage stress generated by the concrete in the hardening process, and the probability of cracking of the high-expansion concrete is lower.
2. According to the invention, by arranging the air bag body, workers can conveniently judge the expansion condition of the concrete in the reinforcing band by observing the expansion change of the air bag body, so that the expansion of the reinforcing band is more visual and convenient to observe.
3. According to the invention, the rubber inflation body is arranged to separate the concrete pre-pouring sections on the two sides, and the rubber inflation body can be deflated and then taken out quickly, so that the construction efficiency is higher.
Drawings
FIG. 1 is a schematic view of the overall structure of the embodiment;
FIG. 2 is a schematic structural diagram of the embodiment for showing the reinforcement belt without casting, which is mainly used for showing the position of the rubber inflatable body and the relative position and connection relationship with the horizontal temperature steel bar;
FIG. 3 is a schematic diagram of an exploded structure of the embodiment, mainly used for representing the internal structure of the formed part;
fig. 4 is a schematic cross-sectional view illustrating the connection relationship inside the molded article according to the embodiment.
Reference numerals: 1. a concrete precast section; 11. a reinforcement cage; 111. a steel bar net plate; 112. supporting the reinforcing steel bars; 12. horizontal temperature steel bars; 13. steel wire mesh; 2. a reinforcing band; 21. a deformation groove; 22. a filler; 3. a forming member; 31. placing the frame; 32. a first through hole; 321. an elastic gauze; 33. a rotating body; 34. a second through hole; 341. placing holes; 35. a vertical rod; 351. an arc-shaped sheet; 36. a balloon body; 361. a rubber air bag; 362. deforming the air bag; 37. an air charging nozzle; 4. a rubber inflatable body; 41. a first rubber body; 42. a separator; 43. an inflatable transverse tube; 44. an extension plate; 5. a transparent box body; 51. an opening; 52. plastic particles; 53. a cover body.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the overlong concrete structure without seams, disclosed by the invention, comprises concrete pre-casting sections 1 positioned at two sides, wherein the two concrete pre-casting sections 1 are arranged at intervals, and a reinforcing belt 2 is arranged between the two concrete pre-casting sections 1.
Referring to fig. 1, the inside of concrete precast segment 1 all is provided with steel reinforcement cage 11, and steel reinforcement cage 11 includes two horizontal extension's that are tied up by the reinforcing bar otter board 111, is provided with a plurality of support bars 112 between steel reinforcement otter board 111, and support bar 112 passes through the thin steel wire and installs on steel reinforcement otter board 111.
Referring to fig. 1, steel wire meshes 13 are installed on opposite sides of two steel reinforcement cages 11, the steel wire meshes 13 are installed at the ends of two steel reinforcement mesh plates 111 arranged in the vertical direction, and the height of each steel wire mesh 13 is greater than that of the uppermost steel reinforcement mesh plate 111.
Referring to fig. 1, a horizontally extending horizontal temperature steel bar 12 is disposed between two steel mesh plates 111 having a higher horizontal position, the extending length of the horizontal temperature steel bar 12 is greater than the gap between two concrete precast sections 1, and the horizontal temperature steel bar 12 is installed on the steel mesh plates 111 through a thin steel wire.
Referring to fig. 2, in the early stage of casting the two reinforcement cages 11, the rubber inflatable body 4 is needed to position the forming position of the concrete precast section 1. The rubber inflatable body 4 comprises a horizontally extending first rubber body 41. The upper end face of the first rubber body 41 is provided with a plurality of partition bodies 42 in a communicating mode, two adjacent partition bodies 42 are arranged at intervals, and the horizontal temperature steel bar 12 is located between the two partition bodies 42.
Referring to fig. 2, since a protective layer of 2-3cm is required to be reserved on the surface of the concrete precast segment 1 away from the reinforcement cage 11, an extension plate 44 is communicated with the upper portion of the partition body 42, and a gap is left between the two extension plates 44, so that the upper end surface formed by the concrete precast segment 1 is located on one side of the extension plate 44.
Referring to fig. 2, in use, the rubber inflatable body 4 is inflated and then placed between the two reinforcement cages 11, and then the horizontal temperature reinforcement 12 is installed by a worker. Because the workman need stand and carry out the construction between two rubber inflation bodies 4, so use for the staff in order to make things convenient for, make and set up for the interval between two rubber inflation bodies 4. The opposite side of the rubber inflatable body 4 is fixedly connected with a horizontally extending inflatable transverse pipe 43, the free end part of the inflatable transverse pipe 43 is abutted against the side wall of the adjacent rubber inflatable body 4, and the inflatable transverse pipes 43 arranged on the rubber inflatable body 4 are alternately arranged at intervals.
Referring to fig. 1-2, the concrete precast segment 1 is formed by casting concrete doped with 8% -10% (equivalent replacement cement) of a high-performance expansive agent. After the construction of the concrete precast section 1 is finished, the rubber inflatable body 4 is deflated and then taken out, a cavity for pouring the reinforcing belt 2 is formed between the two steel wire meshes 13, and then the concrete added with the high-efficiency expanding agent with the mixing amount of 12-13% (equivalent replacement cement) is poured between the two steel wire meshes 13.
Referring to fig. 3 to 4, since the high performance expanding agent is mixed in the reinforcing band 2, the surface of the concrete to which the high performance expanding agent is added may be pressed to protrude upward, and the precast concrete sections 1 at both sides may be adversely affected, so that the molding member 3 for molding the deformed groove 21 is provided at the upper portion of the reinforcing band 2 after the casting of the reinforcing band 2 is completed.
Referring to fig. 3, the forming member 3 includes a placing frame 31, the top of the placing frame 31 is open, the vertical section of the placing frame 31 is U-shaped, a plurality of first through holes 32 are formed on the side walls of the placing frame 31 at intervals, and elastic gauze 321 is fixedly connected between the inner side walls of the first through holes 32.
Referring to fig. 3-4, place the rotor 33 and placed the inside wall of frame 31, place the interior bottom surface fixedly connected with montant 35 of frame 31, a plurality of arc pieces 351 of top fixedly connected with of montant 35, two adjacent arc pieces 351 interval settings, arc piece 351's free end portion downward sloping setting. The bottom of the rotating body 33 is provided with a placing hole 341. During the use, will place hole 341 top-down and pass from arc piece 351 is inside, then cup joint in the montant 35 outside, and rotor 33 alright rotates and can not carry out vertical migration relative montant 35 this moment. A plurality of second through holes 34 are formed in the outer wall of the rolling element 33, and the second through holes 34 communicate with the first through holes 32.
Referring to fig. 4, in order to facilitate the observation of the expansion of the interior of the reinforcing band 2 by the worker, the airbag body 36 is disposed in the interior of the rotating body 33, the airbag body 36 is divided into two parts, one part is a rubber airbag 361 which is disposed in the interior of the rotating body 33 and cannot be expanded or reduced elastically, the other part is a deformable airbag 362 which is mounted in communication with the upper part of the rubber airbag 361 and can be deformed elastically, and the upper part of the deformable airbag 362 is provided with an inflation nozzle 37.
Referring to fig. 3 to 4, in order to further facilitate the observation of the deformation amount of the deformation bladder 362 by the worker, a transparent case 5 is provided on the upper portion of the reinforcing band 2, an opening 51 for placing the deformation bladder 362 is opened at the bottom of the transparent case 5, the transparent case 5 is filled with plastic particles 52, and a cover 53 is attached to the upper end surface of the transparent case 5. When the deformation air bag 362 deforms, the upper end face of the plastic particles 52 moves upwards, and the observation is more visual.
Referring to fig. 1 and 3, the reinforcing band 2 generates a self-stress of 0.2 to 0.6MPa due to the high-performance expanding agent added in the reinforcing band 2. The connection between the reinforcing band 2 and the concrete precast segment 1 is more stable, but if the generated self-stress is too high, the concrete precast segment 1 is deformed and cracked, so that the placing frame 31 is arranged on the upper part of the reinforcing band 2, when the reinforcing band 2 is in the solidification initial stage after the casting is finished, the second through hole 34 on the upper part of the rotating body 33 is not communicated with the first through hole 32, and the concrete in the reinforcing band 2 applies the self-stress to the concrete precast segments 1 on both sides. After the reinforcement belt 2 is solidified, if the self-stress exceeds the expectation, the rotator 33 is rotated, and the elastic gauze 321 is arranged in the first through hole 32, so that the self-stress in the reinforcement belt 2 can be evacuated from the inside of the deformation groove 21, and the condition that the concrete precast sections 1 on the two sides are unstable and break is reduced.
Referring to fig. 1, after the reinforcing band 2 is structurally formed and meets the requirements, the inside of the deformation groove 21 is filled with the filler 22.
The invention discloses a construction method of an ultralong concrete structure without seams, which comprises the following steps:
and S1, manufacturing the reinforcement cage 11. And (5) supporting a template. The two reinforcement cages 11 are used for forming the concrete pre-pouring sections 1 on the two sides. The reinforcement cage 11 comprises a reinforcement mesh plate 111 which extends horizontally and is formed by binding reinforcements, two reinforcement mesh plates 111 in the concrete precast section 1 are vertically arranged, a plurality of support reinforcements 112 are arranged between the two reinforcement meshes in the vertical direction, and the support reinforcements 112 are arranged on the reinforcement mesh plate 111 through thin steel wires; and an outer template is arranged outside the reinforcement cages 11, wraps the two reinforcement cages 11 and is made of wood plates.
And S2, installing the steel wire mesh 13. The steel wire meshes 13 are vertically arranged at the end parts of the two vertically arranged steel bar net plates 111, and the two adjacent steel wire meshes 13 are parallel.
And S3, installing the rubber inflatable body 4. The rubber inflation body 4 sets up two, places the rubber inflation body 4 between two wire net 13, then inflates inside the rubber inflation body 4, because aerify violently the pipe 43 intercommunication and install on the lateral wall of the rubber inflation body 4, when aerifing inside the rubber inflation body 4, aerify this moment and violently manage 43 inside and aerify, this moment aerify violently the pipe 43 keep away from the tip of the junction with the rubber inflation body 4 and the lateral wall butt of the rubber inflation body 4.
And S4, installing the horizontal temperature steel bars 12. The horizontal temperature steel bars 12 are vertically placed between the two partition bodies 42 from the two extension plates 44, the horizontal temperature steel bars 12 are horizontally erected between the two steel bar mesh plates 111 in the same horizontal plane, the horizontal temperature steel bars 12 are arranged at intervals along the extending direction of the steel bar mesh plates 111 and are installed on the steel bar mesh plates 111 through thin steel wires, and the height of the horizontal temperature steel bars 12 is higher than that of the steel bar mesh plates 111 with higher horizontal positions. The horizontal temperature rebar 12 is now positioned between the two spacers 42 and the extension plate 44 is positioned on top of the horizontal temperature rebar 12.
And S5, casting the concrete and casting the section 1 in advance. 8-10% of high-efficiency expanding agent which is equivalent to replace cement is added into the concrete. When pouring, the concrete mixed with 12% -13% of the high-efficiency expanding agent is poured between the outer template and the rubber inflatable body 4, and when pouring, pouring is carried out from one end of the outer template far away from the reinforcing belt 2 to one side close to the rubber inflatable body 4.
S6, recycling the rubber inflatable body 4. After the concrete inside the concrete precast section 1 is preliminarily molded, the gas inside the rubber inflatable body 4 is discharged, and the rubber inflatable body 4 is moved out from the inside of the two steel wire meshes 13.
And S7, roughly processing the opposite sides of the two concrete precast sections 1. And punching uneven chisel surfaces on two opposite sides of the concrete precast section 1 by a punching machine.
And S8, pouring the reinforcing belt 2. Then pouring concrete with the addition of high-efficiency expanding agent with the addition amount of 12% -13% (equivalent replacement cement) between the two steel wire meshes 13, and gradually pouring the concrete of the reinforcing belt 2 layer by layer from the center of the reinforcing belt 2 to the outer side of the reinforcing belt 2.
And S9, forming the deformation groove 21, taking out a part of the concrete in the reinforcing belt 2 from the upper end surface through a tool, then placing the formed part 3 in the reinforcing belt 2, and covering the upper part of the formed part 3 with a wood board to enable the upper end surface of the formed part 3 to be flush with the upper end surface of the reinforcing belt 2.
S10, the rotor 33 is rotated. The rotating body 33 is rotated so that the second through hole 34 and the first through hole 32 in the upper portion of the rotating body 33 communicate with each other, and the airbag body 36 is placed inside the rotating body 33.
And S11, observing the airbag 36. Observing the expansion of the airbag body 36 to judge the contraction of the reinforcing band 2;
and S12, removing the formed part 3. The placement frame 31 is taken out from the inside of the deformation tank 21, and then the filler 22 is filled in the deformation tank 21.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A super-long concrete structure without seams comprises concrete precast sections (1) cast at two sides and a reinforcing belt (2) cast between the concrete precast sections (1) at the two sides; the steel reinforcement cages (11) are arranged in the concrete pre-pouring section (1), a plurality of horizontal temperature steel reinforcements (12) are arranged at the upper parts of the two steel reinforcement cages (11) through steel wire frames, two ends of each horizontal temperature steel reinforcement (12) are poured in the concrete pre-pouring section (1), and the rest parts of the horizontal temperature steel reinforcements (12) are poured in the reinforcing belts (2); the method is characterized in that: a high-efficiency expanding agent accounting for 12-13% of the mass of the used concrete is added into the reinforcing belt (2); the upper end surface of the reinforcing belt (2) is provided with a deformation groove (21) along the extension direction, and a filling agent (22) is filled in the deformation groove (21).
2. The overlength concrete structure without seams of claim 1, wherein: the upper part of the reinforcing belt (2) is provided with a plurality of formed parts (3) at intervals along the extending direction of the reinforcing belt, and the formed parts (3) comprise placing frames (31) placed on the upper part of the reinforcing belt (2) and used for forming the deformed grooves (21).
3. The overlength concrete structure without seams of claim 2, wherein: the side wall interval of placing frame (31) has seted up first through-hole (32), places frame (31) internally mounted and has relatively placed frame (31) and can carry out pivoted rotor (33), and second through-hole (34) have been seted up at the side wall interval of rotor (33), and second through-hole (34) align with the side wall of placing frame (31).
4. A super long seamless concrete structure according to claim 3, characterized in that: an air bag body (36) is arranged inside the rotating body (33).
5. A super long seamless concrete structure according to claim 3, characterized in that: the upper end surface of the reinforcing belt (2) is provided with a transparent box body (5) which is covered on the upper part of the air bag body (36), a plastic particle (52) layer is arranged in the transparent box body (5), and the upper end surface of the plastic particle (52) layer is higher than the upper end surface of the air bag body (36).
6. The overlength concrete structure without seams of claim 1, wherein: the concrete precast sections (1) on the two sides are separated by a rubber inflatable body (4) when being formed.
7. The overlength concrete structure without seams of claim 6, wherein: the rubber inflatable body (4) comprises a first rubber body (41) extending horizontally, a plurality of partition bodies (42) are mounted on the upper end face of the first rubber body (41), and the horizontal temperature steel bar (12) is located between the two partition bodies (42).
8. The overlength concrete structure without seams of claim 7, wherein: extension plates (44) are communicated and installed on the upper portions of the two separating bodies (42), and the two adjacent extension plates (44) are connected in an abutting mode.
9. The overlength concrete structure without seams of claim 6, wherein: and one side of each of the two rubber inflatable bodies (4) opposite to each other is provided with a plurality of inflatable transverse tubes (43) in a communicated manner, and the free end parts of the inflatable transverse tubes (43) are abutted against the side walls of the adjacent first rubber bodies (41).
10. A construction method of an overlength concrete structure without seams is characterized in that: the method comprises the following steps:
s1, manufacturing a reinforcement cage (11): the reinforcement cage (11) for forming inside the concrete precast section (1) is formed by combining two vertically-arranged and horizontally-extending reinforcement net plates (111) and supporting reinforcements (112), wherein the reinforcement net plates (111) are formed by binding a plurality of transverse and longitudinal reinforcements through steel wires; the method comprises the steps of firstly placing the steel bar net plate (111) at the bottom, then binding the supporting steel bars (112) on the upper part of the steel bar net plate (111) through steel wires, and then binding the steel bar net plate (111) at the top on the upper part of the supporting steel bars (112). Standing an outer template outside the two reinforcement cages (11);
s2, installing a steel wire mesh (13): respectively installing a steel wire mesh (13) at one side opposite to the two reinforcement cages (11), wherein the height of the steel wire mesh is higher than that of the reinforcement cages (11);
s3, installing a rubber inflating body (4): two rubber inflatable bodies (4) are placed between two steel wire meshes (13), then the rubber inflatable bodies (4) are inflated, one sides of the rubber inflatable bodies (4) opposite to each other are respectively abutted against the adjacent steel wire meshes (13), and an inflating transverse pipe (43) is positioned between two first rubber bodies (41);
s4, installing horizontal temperature steel bars (12): vertically downwards penetrating a horizontal temperature steel bar (12) through two extension plates (44) and placing the horizontal temperature steel bar between two separation bodies (42), erecting the horizontal temperature steel bar (12) at the upper parts of two steel bar cages (11), then binding the horizontal temperature steel bar (12) at the upper parts of the steel bar cages (11) through steel wires, wherein the horizontal temperature steel bar (12) is positioned at the upper part of a first rubber body (41) and between the two separation bodies (42), and the extension plates (44) are positioned at the upper parts of the horizontal temperature steel bar (12);
s5, pouring concrete and pouring a section (1) in advance: 8 to 10 percent of high-efficiency expanding agent which is equivalent to replace cement is added into the concrete used for casting the concrete precast section (1);
s6, recycling rubber inflation body (4): discharging the gas in the rubber inflatable body (4), and taking out the rubber inflatable body (4) from the two steel wire meshes (13);
s7, treating the opposite side walls of the concrete precast section (1): punching an uneven chiseling surface on one side, opposite to the two concrete precast sections (1), of the punching machine;
s8, pouring the reinforcing belt (2): pouring concrete with the addition of high-efficiency expanding agent with the addition amount of 12% -13% (equivalent replacement cement) between the two steel wire meshes (13), and gradually pouring the concrete of the reinforcing belt (2) layer by layer from the center of the reinforcing belt (2) to the outer side of the reinforcing belt (2);
s9, forming a deformed groove (21): installing a rotating body (33) in the placing frame (31), then rotating a second through hole (34) at the upper part of the rotating body (33) to the inner side wall of the placing frame (31), placing the placing frame (31) at the upper part of the reinforcing belt (2), and taking out the redundant concrete;
s10, rotating the rotating body (33): the second through hole (34) and the first through hole (32) are communicated, and the outer side wall of the air bag body (36) is abutted against the elastic gauze (321);
s11, observation of the balloon body (36): observing the expansion condition of the air bag body (36) and further judging the contraction condition of the reinforcing belt (2);
s12, taking down the formed piece (3): the placement frame (31) is taken out from the inside of the deformation groove (21), and then the filler (22) is filled in the deformation groove (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219141.8A CN111379418B (en) | 2020-03-25 | 2020-03-25 | Overlong concrete structure without seams and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219141.8A CN111379418B (en) | 2020-03-25 | 2020-03-25 | Overlong concrete structure without seams and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111379418A true CN111379418A (en) | 2020-07-07 |
| CN111379418B CN111379418B (en) | 2022-03-15 |
Family
ID=71221819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010219141.8A Active CN111379418B (en) | 2020-03-25 | 2020-03-25 | Overlong concrete structure without seams and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111379418B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187092A (en) * | 2021-04-14 | 2021-07-30 | 浙江信宇建设集团有限公司 | Crack-proof long and narrow concrete structure and construction method thereof |
| CN114164975A (en) * | 2021-12-29 | 2022-03-11 | 北京大古建筑技术发展有限公司 | Concrete bearing base layer and construction process thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE690135A (en) * | 1966-02-24 | 1967-05-02 | ||
| CN201977758U (en) * | 2011-01-02 | 2011-09-21 | 舒明芳 | Air-pressure spreading jaw biting device |
| CN103161308A (en) * | 2011-12-09 | 2013-06-19 | 沈阳妙盛置业有限公司 | Forming die member for cast-in-site concrete hole-forming |
| CN203334442U (en) * | 2013-06-18 | 2013-12-11 | 浙江海天建设集团有限公司 | Expansion reinforcing band system for concrete continuous pouring |
| CN104453046A (en) * | 2014-11-14 | 2015-03-25 | 阳文皇 | Combined core mold provided with compression-resisting tension bars and used for cast-in-place concrete |
| CN106193340A (en) * | 2016-08-26 | 2016-12-07 | 杭州江润科技有限公司 | Cast-in-place prestressing without bondn ultralong floor combination type reinforcing strip anti-cracking structure and construction method |
| CN110195475A (en) * | 2019-06-15 | 2019-09-03 | 中国化学工程第十一建设有限公司 | A kind of concrete structure large pool contracting seam Antiseep method |
-
2020
- 2020-03-25 CN CN202010219141.8A patent/CN111379418B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE690135A (en) * | 1966-02-24 | 1967-05-02 | ||
| CN201977758U (en) * | 2011-01-02 | 2011-09-21 | 舒明芳 | Air-pressure spreading jaw biting device |
| CN103161308A (en) * | 2011-12-09 | 2013-06-19 | 沈阳妙盛置业有限公司 | Forming die member for cast-in-site concrete hole-forming |
| CN203334442U (en) * | 2013-06-18 | 2013-12-11 | 浙江海天建设集团有限公司 | Expansion reinforcing band system for concrete continuous pouring |
| CN104453046A (en) * | 2014-11-14 | 2015-03-25 | 阳文皇 | Combined core mold provided with compression-resisting tension bars and used for cast-in-place concrete |
| CN106193340A (en) * | 2016-08-26 | 2016-12-07 | 杭州江润科技有限公司 | Cast-in-place prestressing without bondn ultralong floor combination type reinforcing strip anti-cracking structure and construction method |
| CN110195475A (en) * | 2019-06-15 | 2019-09-03 | 中国化学工程第十一建设有限公司 | A kind of concrete structure large pool contracting seam Antiseep method |
Non-Patent Citations (1)
| Title |
|---|
| 朱馥林: "《地下防水工程施工与验收手册》", 31 March 2006 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187092A (en) * | 2021-04-14 | 2021-07-30 | 浙江信宇建设集团有限公司 | Crack-proof long and narrow concrete structure and construction method thereof |
| CN114164975A (en) * | 2021-12-29 | 2022-03-11 | 北京大古建筑技术发展有限公司 | Concrete bearing base layer and construction process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111379418B (en) | 2022-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3619432A (en) | Method and apparatus for construction of concrete shells | |
| CN111379418B (en) | Overlong concrete structure without seams and construction method thereof | |
| CN104278643B (en) | A kind of Continuous Rigid Box girder construction process being applied to science of bridge building | |
| CN106182359A (en) | The concrete list storehouse horizontal mould of pipe gallery, system and piping lane molding methods | |
| CN103290967A (en) | Multi-ribbed hollow composite floor slab and manufacturing method thereof | |
| CN109519197A (en) | A kind of sliding formwork just dual-purpose trolley of lining excavation supporting and its application | |
| CN104452591A (en) | Cast-in-place box beam construction technology applied to bridge constructions | |
| CN210282675U (en) | Concrete prefabricated member forming die | |
| CN104328738A (en) | Continuous steel structure construction method for bridge building | |
| CN105064500B (en) | Balcony beam slab inner side filling wall body and main body structure integral casting construction method | |
| CN109339089A (en) | A kind of rim of a cup isolated footing cup core forming method | |
| CN109025293B (en) | Thick plate side mold post-cast strip supporting method | |
| CN101200877A (en) | Non-support construction process for triangle frame | |
| CN114776013A (en) | Wall column beam node concrete pouring construction method with different strength grades | |
| CN114277672B (en) | Large-span prestressed concrete bent cap structure and construction method thereof | |
| CN110259172B (en) | Construction method for transforming original precast slab into cast-in-place slab | |
| CN109371901B (en) | Pile bearing type retaining wall of cofferdam in dry period and construction method | |
| CN112681289B (en) | Arch plate of pile plate wall and manufacturing method thereof | |
| US2102254A (en) | Method and apparatus for building sea walls | |
| CN206707123U (en) | Precast concrete column and concrete combination column | |
| CN211447882U (en) | Elevator shaft with bottom plate prefabricated reinforcement cage | |
| CN216109132U (en) | Precast wallboard of building engineering | |
| CN115853199A (en) | Prefabricated hollow column with concrete bracket and production method thereof | |
| CN220599167U (en) | Plugging template structure for two sides of post-pouring belt of pre-pouring floor top plate of ultra-long building | |
| CN216765856U (en) | Full-sleeve full-rotation water-stop secant pile for high confined water stratum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |