CN115584860A - Large-volume concrete pouring device and method - Google Patents
Large-volume concrete pouring device and method Download PDFInfo
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- CN115584860A CN115584860A CN202211238402.6A CN202211238402A CN115584860A CN 115584860 A CN115584860 A CN 115584860A CN 202211238402 A CN202211238402 A CN 202211238402A CN 115584860 A CN115584860 A CN 115584860A
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- 238000000034 method Methods 0.000 title claims description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000003973 irrigation Methods 0.000 claims description 22
- 230000002262 irrigation Effects 0.000 claims description 22
- 230000010412 perfusion Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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Abstract
The invention discloses a large-volume concrete pouring device, which comprises: a concrete preparation system; the material storage device comprises an inner cylinder and an outer cylinder which are coaxially arranged, wherein the inner cylinder can be rotatably arranged relative to the outer cylinder, and a positioning opening part is arranged on the inner cylinder, so that the inner cylinder is opposite to a material inlet when rotating to a first position and opposite to a material outlet when rotating to a second position; a concrete layering system; the concrete layering device is arranged below the side of the concrete preparation system and comprises a concrete layering device and a concrete propelling part, wherein the concrete layering device comprises a liner and a shell which are coaxially and relatively slidably arranged, and the concrete propelling part is connected with the liner to drive the liner to slide outwards; and the concrete pouring system is a concrete pouring tank body arranged at the tail end of the concrete layering system. The invention can realize the multi-section pouring of the mass concrete, and can control the temperature and the temperature stress of the mass concrete structure by setting a certain program.
Description
Technical Field
The invention relates to the field of building construction. More particularly, the present invention relates to a mass concrete pouring apparatus and method.
Background
The mass concrete structure belongs to a composite material with complex chemical properties, is very easily influenced by the external environment in the pouring process, and generates a large amount of temperature stress inside the structure, so that the control difficulty of the mass concrete pouring structure quality is high. Secondly, the large-volume concrete structure has larger size, larger pouring amount than common concrete and higher content of internal steel bars, thereby causing larger difficulty in pouring concrete. The difficulty of pouring the mass concrete structure is high, so that the pouring quality is difficult to control, the phenomena of construction cold joint, temperature crack, dry shrinkage joint and bleeding easily occur, and the integrity of the structure is damaged. Particularly, in the layered pouring stage, the cold joint phenomenon is more easily generated, and the failure of concrete pouring is more easily caused when the upper layer concrete pouring work is carried out on the lower layer concrete for reaching the initial setting time. Therefore, the existing large-volume concrete pouring method needs to reduce the subsection quantity as much as possible, so that the mold-entering temperature, the temperature rise and the temperature stress are difficult to control.
Disclosure of Invention
It is an object of the present invention to address at least the above problems and to provide at least the advantages described hereinafter.
It is still another object of the present invention to provide a mass concrete pouring device, which can realize multi-stage pouring of mass concrete and control the temperature and temperature stress of mass concrete structure by setting a certain program.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a mass concrete pouring device including:
a concrete preparation system; the material storage device comprises an inner cylinder and an outer cylinder which are coaxially arranged, wherein a material inlet and a material outlet are respectively formed in the top and the bottom of the outer cylinder, the inner cylinder can be rotatably arranged relative to the outer cylinder, and a positioning opening part is formed in the inner cylinder, so that the inner cylinder is opposite to the material inlet when rotating to a first position and is opposite to the material outlet when rotating to a second position;
a concrete layering system; the concrete preparation system is arranged below the side of the concrete preparation system and comprises a concrete delayer and a concrete propelling part, wherein the concrete delayer comprises an inner container and a shell which are coaxially and relatively slidably arranged, a transmission opening part communicated with a discharge hole of a material storage device through a pipe body is arranged on the shell, and the inner container is a closed shell with openings at the top and the bottom; the concrete propelling part is connected with the inner container to drive the inner container to slide towards the outside of the shell; and
and the concrete pouring system is a concrete pouring tank body arranged at the tail end of the concrete layering system.
Preferably, the support frame assembly further comprises a base, and a first support frame, a second support frame and a third support frame which are arranged on the base and support the stocker, the concrete layering device and the concrete propelling part.
Preferably, the concrete propelling part comprises a motor and an electric hydraulic push rod, and the motor provides a power source for the telescopic motion of the electric hydraulic push rod.
Preferably, a stirrer is further provided in the inner cylinder of the hopper.
Preferably, the bottom of the pouring tank body is further provided with a pouring device, and the pouring device comprises a pouring pipe, a connecting flange and a fixed fan blade.
Preferably, a liquid level meter is further arranged in an inner container of the concrete layering device to control the single storage amount in the concrete layering device to be consistent.
The invention further claims a pouring method of the large-volume concrete pouring device, which comprises the following steps:
step one, unevenly dividing the pre-poured mass concrete into P sections in the height direction, so that the heights of the poured sections N1, N2, N3 … … Nm … … Np from bottom to top meet the following conditions:
p〉m;
n1 is more than or equal to 0.8m and less than or equal to 1.2m;
the heights of N1, N2 and N3 … … Nm … … Np are sequentially increased by 0.3-0.5 m,
if Np is less than or equal to 2.0m, sequentially increasing to the previous segment of Np, and taking the balance of Np
If Nm is larger than or equal to 2.0m, the height from the Nm section to the previous section Np is 2.0m, and the balance is taken for Np.
Step two, calculating the pushing times and the average storage amount of the concrete delayer according to the volume of the N1 pouring section, starting the concrete preparation system and the concrete delayer until the concrete in the concrete delayer reaches the average storage amount, pushing the concrete in the concrete delayer into the concrete pouring system by the concrete pushing part, starting the concrete pouring system, and setting the pouring speed according to the storage time and the pushing time of the concrete delayer; stopping the filling for 40-60 min after the filling of the N1 filling section is finished;
thirdly, calculating the pushing times and the average storage amount of the concrete delayer of the section of pouring section according to the sum of the volume of the next section of pouring section and the previous stopping and sinking volume, starting the concrete preparation system and the concrete layering system until the concrete in the concrete delayer reaches the average storage amount, pushing the concrete in the concrete delayer into the concrete pouring system by the concrete pushing part, starting the concrete pouring system, and setting the pouring speed according to the storage time and the pushing time of the concrete delayer; until the perfusion of the perfusion section is finished;
and step four, stopping the irrigation for T time, and repeating the step three until the time of all the irrigation sections is finished.
Preferably, the irrigation stopping time T is 40-60 min after the completion of the initial 10 irrigation sections; stopping the irrigation for 20-40 min after the 11 th-20 th irrigation section is finished; the irrigation stopping time T is 15min after the 21 st and later irrigation sections are finished.
The invention at least comprises the following beneficial effects:
the invention provides a multi-section large-volume concrete pouring method for the first time, and provides a device suitable for multi-section large-volume concrete pouring, which can realize multi-section pouring of large-volume concrete and can control the temperature and the temperature stress of a large-volume concrete structure by setting a certain program;
secondly, the mass concrete pouring device provided by the invention is provided with an independent concrete preparation system, a concrete layering system and a concrete pouring system, the mold-entering temperature is controlled to be in front, and the temperature rise control after mold entering is controlled by the combined control of the pouring speed of the concrete layering system and the pouring system, so that the structural temperature and the temperature stress of multi-section pouring are ensured, and the problem of temperature cracks is avoided;
thirdly, the large-volume concrete pouring device provided by the invention simplifies the mastering of pouring time, lowers the technical requirements on constructors, and lowers the probability that the upper-layer concrete is poured before the initial setting time of the lower-layer concrete, thereby forming a construction cold joint which cannot be repaired; meanwhile, the method can also avoid inaccurate control of the filling interval time, which causes insufficient adhesion degree of the concrete structure and serious bleeding phenomenon;
fourthly, the mass concrete pouring method provided by the invention shortens the curing time of the mass concrete to a certain extent.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a large-volume concrete pouring device according to an embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1, the present invention provides a mass concrete pouring device, comprising:
the concrete preparation system comprises a material storage device, wherein the material storage device comprises an inner cylinder 2 and an outer cylinder 1 which are coaxially arranged, a feeding port and a discharging port are respectively arranged at the top and the bottom of the outer cylinder 1, the inner cylinder 2 is rotatably arranged relative to the outer cylinder 1, and a positioning port part is arranged on the inner cylinder 2, so that the inner cylinder 2 is opposite to the feeding port when rotated to a first position and is opposite to the discharging port when rotated to a second position;
the concrete layering system is arranged below the concrete preparation system and comprises a concrete layering device and a concrete propelling component, wherein the concrete layering device comprises an inner container 4 and an outer shell 3 which are coaxially and relatively slidably arranged, a transmission opening communicated with a discharge hole of a storage device through a pipe body 13 is arranged on the outer shell 3, and the inner container 4 is a closed shell with an opening at the top and the bottom; the concrete propelling component is connected with the inner container 4 to drive the inner container 4 to slide towards the outside of the shell 3; and
and the concrete pouring system is a concrete pouring tank body 5 arranged at the tail end of the concrete layering system.
In the technical scheme, the large-volume concrete pouring device comprises a concrete preparation system, a concrete layering system and a concrete pouring system which are independently arranged and are mutually connected; the temperature control of the mold is performed in front, and the temperature rise control after the mold is performed is controlled by the combined control of the pouring speed of the concrete layering system and the pouring system, so that the structure temperature and the temperature stress of multi-section pouring are ensured, and the problem of temperature cracks is avoided. Meanwhile, the control of the pouring time is simplified, the technical requirements on constructors are reduced, and the probability that the pouring work of the upper layer concrete is carried out when the lower layer concrete does not reach the initial setting time is reduced, so that the unrepairable construction cold joint is formed; meanwhile, the condition that the filling interval time is not accurately controlled, so that the adhesion degree of a concrete structure is not enough and serious bleeding phenomenon occurs can be avoided.
In the technical scheme, the inner container 4 and the shell 3 of the concrete layering device are preferably structured in such a way that a sliding block is arranged on the outer wall of the inner container 4, an annular sliding rail and an axial sliding rail are arranged on the inner wall of the shell 3, so that the inner container 4 can rotate circumferentially relative to the shell 3 and can move telescopically relative to the shell 3, the annular sliding rail is close to the end part of the shell 3, and the power source telescopic end part for driving the inner container 4 to move telescopically is connected with the rotary shaft body through a bearing, so that circumferential rotation and telescopic movement can be realized.
In one technical scheme, the device further comprises a bracket assembly which comprises a base 7, a first support frame body 9, a second support frame body 10 and a third support frame body 8, wherein the first support frame body 9, the second support frame body 10 and the third support frame body 8 are arranged on the base and used for supporting the stocker, the concrete layering device and the concrete propelling component.
In one technical scheme, the concrete propelling part comprises a motor and an electric hydraulic push rod, and the motor provides a power source for the telescopic motion of the electric hydraulic push rod.
In one technical scheme, a stirrer is further arranged in an inner cylinder of the stocker, and a stirring shaft of the stirrer is arranged along the axial direction of the inner cylinder.
In one of the technical scheme, the bottom of the perfusion tank body 5 is further provided with a perfusion device 6, and the perfusion device comprises a perfusion pipe, a connecting flange and a fixed fan blade.
In one technical scheme, a liquid level meter is further arranged in an inner container of the concrete layering device to control the single storage amount in the concrete layering device to be consistent, and the liquid level meter is arranged along the vertical radial direction.
The invention further claims a pouring method of the large-volume concrete pouring device, which comprises the following steps:
step one, unevenly dividing the pre-poured mass concrete into P sections in the height direction, so that the heights of the pouring sections N1, N2 and N3 … … Nm … … Np from bottom to top meet the following conditions:
p〉m;
n1 is more than or equal to 0.8m and less than or equal to 1.2m;
the heights of N1, N2 and N3 … … Nm … … Np are sequentially increased by 0.3-0.5 m,
if Np is less than or equal to 2.0m, sequentially increasing to the previous segment of Np, and taking the balance of Np
If Nm is greater than or equal to 2.0m, the height from Nm section to Np section is 2.0m, and the balance is Np.
Secondly, calculating the pushing times and the average storage amount of the concrete delayer according to the volume of the N1 pouring section, starting the concrete preparation system and the concrete delayer until the concrete in the concrete delayer reaches the average storage amount, pushing the concrete in the concrete delayer into the concrete pouring system by the concrete pushing part, starting the concrete pouring system, and setting the pouring speed according to the storage time and the pushing time of the concrete delayer; stopping the filling for 40-60 min after the filling of the N1 filling section is finished;
thirdly, calculating the pushing times and the average storage amount of the concrete delayer of the section of pouring section according to the sum of the volume of the next section of pouring section and the previous stopping and sinking volume, starting the concrete preparation system and the concrete layering system until the concrete in the concrete delayer reaches the average storage amount, pushing the concrete in the concrete delayer into the concrete pouring system by the concrete pushing part, starting the concrete pouring system, and setting the pouring speed according to the storage time and the pushing time of the concrete delayer; until the perfusion of the perfusion section is finished;
and step four, stopping the irrigation for T time, and repeating the step three until the time of all the irrigation sections is finished.
In one technical scheme, the irrigation stopping time T is 40-60 min after the completion of the initial 10 irrigation sections; stopping the irrigation for 20-40 min after the 11 th-20 th irrigation section is finished; the irrigation stopping time T is 15min after the 21 st and later irrigation sections are finished.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present bulk concrete pouring apparatus will be apparent to those skilled in the art.
As described above, according to the present invention, at least the following advantageous effects are included:
the invention provides a multi-section large-volume concrete pouring method for the first time, and provides a device suitable for multi-section large-volume concrete pouring, which can realize multi-section pouring of large-volume concrete and can control the temperature and the temperature stress of a large-volume concrete structure by setting a certain program;
secondly, the mass concrete pouring device provided by the invention is provided with an independent concrete preparation system, a concrete layering system and a concrete pouring system, the mold-entering temperature is controlled to be in front, and the temperature rise control after mold entering is controlled by the combined control of the pouring speed of the concrete layering system and the pouring system, so that the structural temperature and the temperature stress of multi-section pouring are ensured, and the problem of temperature cracks is avoided;
thirdly, the large-volume concrete pouring device provided by the invention simplifies the mastering of pouring time, lowers the technical requirements on constructors, and lowers the probability that the upper-layer concrete is poured before the initial setting time of the lower-layer concrete, thereby forming a construction cold joint which cannot be repaired; meanwhile, the method can also avoid inaccurate control of the filling interval time, which causes insufficient adhesion degree of the concrete structure and serious bleeding phenomenon;
fourthly, the mass concrete pouring method provided by the invention shortens the curing time of the mass concrete to a certain extent.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. Bulky concrete perfusion device, its characterized in that includes:
the concrete preparation system comprises a material storage device, wherein the material storage device comprises an inner cylinder and an outer cylinder which are coaxially arranged, the top and the bottom of the outer cylinder are respectively provided with a feed inlet and a discharge outlet, the inner cylinder can be rotatably arranged relative to the outer cylinder, and a positioning opening part is arranged on the inner cylinder, so that the inner cylinder is opposite to the feed inlet when rotating to a first position and is opposite to the discharge outlet when rotating to a second position;
the concrete layering system is arranged below the concrete preparation system and comprises a concrete layering device and a concrete propelling component, wherein the concrete layering device comprises an inner container and an outer shell which are coaxially and relatively slidably arranged, a transmission opening communicated with a discharge hole of the material storage device through a pipe body is arranged on the outer shell, and the inner container is a closed shell with openings at the top and the bottom; the concrete propelling part is connected with the inner container to drive the inner container to slide towards the outside of the shell; and
and the concrete pouring system is a concrete pouring tank body arranged at the tail end of the concrete layering system.
2. A bulk concrete pouring device according to claim 1, further comprising a stand assembly comprising a base, a first support frame, a second support frame, and a third support frame disposed on the base for supporting the hopper, the concrete layering device, and the concrete propelling member.
3. The mass concrete pouring device according to claim 2, wherein the concrete propelling part comprises a motor and an electro-hydraulic push rod, and the motor provides a power source for the telescopic movement of the electro-hydraulic push rod.
4. A bulk concrete pouring device according to claim 3 wherein an agitator is also provided within the inner barrel of the hopper.
5. A mass concrete pouring device according to claim 4, wherein the bottom of the pouring tank is further provided with a pouring device, and the pouring device comprises a pouring pipe, a connecting flange and a fixing fan blade.
6. The mass concrete pouring device according to claim 5, wherein a liquid level gauge is further arranged in the inner container of the concrete layering device to control the single storage amount in the concrete layering device to be consistent.
7. A method of placement by a large-volume concrete placement device according to any one of claims 1 to 6, comprising:
step one, unevenly dividing the pre-poured mass concrete into P sections in the height direction, so that the heights of the pouring sections N1, N2 and N3 … … Nm … … Np from bottom to top meet the following conditions:
p〉m;
n1 is more than or equal to 0.8m and less than or equal to 1.2m;
the heights of N1, N2 and N3 … … Nm … … Np are sequentially increased by 0.3-0.5 m,
if Np is less than or equal to 2.0m, sequentially increasing to the previous segment of Np, and taking the balance of Np
If Nm is larger than or equal to 2.0m, the height from the Nm section to the previous section Np is 2.0m, and the balance is taken for Np.
Secondly, calculating the pushing times and the average storage amount of the concrete delayer according to the volume of the N1 pouring section, starting the concrete preparation system and the concrete delayer until the concrete in the concrete delayer reaches the average storage amount, pushing the concrete in the concrete delayer into the concrete pouring system by the concrete pushing part, starting the concrete pouring system, and setting the pouring speed according to the storage time and the pushing time of the concrete delayer; stopping the filling for 40-60 min after the filling of the N1 filling section is finished;
thirdly, calculating the pushing times and the average storage amount of the concrete delayer of the section of pouring section according to the sum of the volume of the next section of pouring section and the previous stopping and sinking volume, starting the concrete preparation system and the concrete layering system until the concrete in the concrete delayer reaches the average storage amount, pushing the concrete in the concrete delayer into the concrete pouring system by the concrete pushing part, starting the concrete pouring system, and setting the pouring speed according to the storage time and the pushing time of the concrete delayer; until the perfusion of the perfusion section is finished;
and step four, stopping the irrigation for T time, and repeating the step three until the time of all the irrigation sections is finished.
8. A perfusion method according to claim 7, wherein the time T for stopping perfusion after completion of the first 10 perfusion segments is 40-60 min; stopping the irrigation for 20-40 min after the 11 th-20 th irrigation section is finished; the irrigation stopping time T is 15min after the 21 st and later irrigation sections are finished.
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