CN112457051A - Mass concrete construction process for preventing mass concrete from cracking - Google Patents
Mass concrete construction process for preventing mass concrete from cracking Download PDFInfo
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- CN112457051A CN112457051A CN202011357960.5A CN202011357960A CN112457051A CN 112457051 A CN112457051 A CN 112457051A CN 202011357960 A CN202011357960 A CN 202011357960A CN 112457051 A CN112457051 A CN 112457051A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0075—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of a decrease in temperature
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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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- 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
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a large-volume concrete construction process for preventing large-volume concrete from cracking, which comprises the following steps: drawing an installation structure schematic diagram of a water circulation control system; prefabricating a water circulation support, wherein the water circulation support comprises a plurality of water circulation units arranged at intervals, and a grid-shaped water flow channel is arranged in each water circulation unit; the upper left corner and the upper right corner of each grid-shaped water flow channel are respectively provided with a water inlet and a water outlet which are communicated with the upper left corner and the upper right corner; after laying and binding bottom layer steel bar meshes in place, welding the bottoms of the water circulation units and the bottom layer steel bar meshes together; binding the reinforcing mesh sheets on each reinforcing mesh sheet supporting layer by layer from bottom to top; connecting the water inlet of each water circulation unit with a water pump through a water inlet pipe, and connecting the water inlet with an external reservoir through the water pump, and meanwhile, connecting the water outlet of each water circulation unit with the reservoir through a water outlet pipe to form a plurality of water circulation water paths; and (5) pouring concrete.
Description
Technical Field
The invention relates to the field of building construction, in particular to a large-volume concrete construction process for preventing large-volume concrete from cracking.
Background
The mass concrete with the minimum physical dimension not less than 1m of the mass concrete cross concrete structure entity is widely applied to the infrastructure construction of hydraulic and hydroelectric engineering, nuclear power engineering, port engineering, traffic and the like. In the construction process, the mass concrete is not easy to dissipate heat, the internal temperature can reach 60-65 ℃ at most, and the internal temperature has long duration, so that the internal cracking phenomenon often occurs. Once such a situation occurs, it is difficult to restore the integrity of the structure by means of repair or the like, and therefore, it is an urgent technical problem to solve the problem of mass concrete cracking.
In order to solve the above problems, the following methods are mainly adopted in the prior art: 1. the concrete formula is improved, the phase-change material and the starch-based hydration heat regulating material are added into the concrete formula, the phase-change material absorbs heat generated by concrete hydration, and the hydration heat regulating material is combined to reduce the hydration heat release rate of cement. 2. A cold water circulating water pipe is arranged in the concrete, and the cold water is circulated to take away heat in the concrete, so that the interior of the concrete is cooled.
The two cooling modes can reduce the cracking phenomenon of mass concrete to a certain extent, but other materials are added into the concrete to influence the strength of the concrete to a certain extent, and the concrete cannot be adjusted in real time according to the internal real-time temperature of the concrete. Although the cold water circulating water pipe can regulate and control water flowing in the water pipe in real time according to the real-time temperature in the concrete, the existing cold water circulating water pipe is only installed and laid on the surface and the ground of the concrete, the temperature of the middle part of the concrete cannot be regulated and controlled, and meanwhile, the existing cold water circulating water pipe system only has one water inlet and one water outlet and cannot regulate and control the local temperature of the concrete in real time.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide one kind can regulate and control bulky concrete local temperature, and can also realize the bulky concrete construction technology who prevents the fracture of bulky concrete that supports to reinforcing bar net piece.
In order to solve the technical problems, the invention adopts the following technical scheme:
a large-volume concrete construction process for preventing large-volume concrete from cracking is characterized by comprising the following steps: s1, calculating the load of the unit area of the multiple layers of steel bar meshes in the mass concrete structure according to the area of the site to be constructed and the thickness of concrete, and drawing an installation structure schematic diagram of the water circulation control system according to the load and the laying range of the steel bar meshes; s2, prefabricating a water circulation support in a factory according to the installation structure schematic diagram of the water circulation control system in S1, wherein the water circulation support comprises a plurality of water circulation units arranged at intervals, each water circulation unit is internally provided with a latticed water flow channel, the latticed water flow channels are internal channels formed by connecting a plurality of transverse pipes and vertical pipes, and the transverse pipes positioned at the same horizontal position form a reinforcing mesh supporting layer; the upper end of each grid-shaped water flow channel is provided with a water inlet and a water outlet which are communicated with the water flow channel inside the grid-shaped water flow channel; s3, lofting the plane size of the mass concrete on a flat ground by using a measuring instrument and marking the installation position of each water circulation unit in the plane; s4, laying bottom layer steel bar meshes, binding the bottom layer steel bar meshes in place, and welding the bottoms of the water circulation units and the bottom layer steel bar meshes together according to the installation positions of the water circulation units marked on the ground after acceptance check is qualified; s5, at least one temperature sensor is fixedly arranged on each reinforcing steel mesh supporting layer of each water circulation unit; s6, binding the reinforcing mesh sheets on each reinforcing mesh sheet supporting layer by layer from bottom to top; s7; connecting the water inlet of each water circulation unit with a water pump through a water inlet pipe, and connecting the water inlet with an external reservoir through the water pump, and meanwhile, connecting the water outlet of each water circulation unit with the reservoir through a water outlet pipe to form a plurality of water circulation water paths; s8, dividing bins and pouring concrete in layers; and S9, after the concrete pouring of each layer is finished, according to the temperature monitored by each temperature sensor, continuously cooling the interior of the concrete by using a water pump, and simultaneously, preserving heat, moisturizing and curing the mass concrete. Like this, the hydrologic cycle support has the hydrologic cycle unit of a plurality of intervals settings to constitute, and each hydrologic cycle unit is intake alone, is discharged water, forms a continuous circulation's hydrologic cycle pipeline behind with water pump UNICOM, and then can cool down bulky concrete part through each hydrologic cycle unit, realizes local temperature control. The latticed water flow channel formed in each water circulation unit can enable the water flow path to be latticed, so that concrete at each position can be cooled, and the temperature is controlled uniformly. During the assembly, each hydrologic cycle unit is connected through violently managing and standpipe, convenient assembling, standard. The temperature sensor that sets up can detect the temperature of each position of concrete to after giving the constructor with temperature data feedback, according to bulky concrete temperature demand, open the water pump, regulate and control concrete internal temperature, it is comparatively convenient to regulate and control. In addition, the horizontal pipe that is located same height among the hydrologic cycle unit in this application can form the support to reinforcing bar net piece, can increase reinforcing bar net piece's steadiness for reinforcing bar net piece is also difficult for the deformation after trampling.
Furthermore, the horizontal pipes and the vertical pipes of the water circulation units are connected through water pipe joints, and the water pipe joints are two-way joints or three-way joints or four-way joints according to the number of the horizontal pipes and the vertical pipes to be communicated. Like this, violently manage and the standpipe passes through water pipe head and connects, and connection structure is firm, the phenomenon of leaking can not appear.
Furthermore, two ends of the transverse pipe and two ends of the vertical pipe are respectively provided with an annular mounting disc, the transverse pipe and the water pipe joint and the vertical pipe and the water pipe joint are fixedly connected through a pipe hoop, and the pipe hoop comprises an upper pipe hoop and a lower pipe hoop which are semicircular; one end of the upper pipe hoop and one end of the lower pipe hoop are rotatably connected through a rotating shaft, the other end of the upper pipe hoop and the other end of the lower pipe hoop are fixedly connected through a connecting piece, and a circular clamping groove concentric with the pipe hoop is formed inside the upper pipe hoop and the lower pipe hoop after the upper pipe hoop and the lower pipe hoop are connected; the circular clamping groove is arranged in the annular mounting disc of the transverse pipe or the vertical pipe and the arc-shaped mounting disc of the corresponding end of the water pipe joint and the transverse pipe or the vertical pipe, and the circular clamping groove is clamped and fixed through the upper pipe hoop and the lower pipe hoop. Therefore, the connecting parts of the transverse pipe and the water pipe connector and the connecting parts of the vertical pipe and the water pipe connector are arranged in the circular clamping grooves in the pipe hoop and are clamped and fixed together through the circular clamping grooves of the pipe hoop. Two holder one end of ferrule rotate to be connected, and the other end passes through the connecting piece to be connected, and forms a confined circular draw-in groove in the middle part after being in the same place, and then can be with pipe fitting and water pipe head's link card in circular draw-in groove, make to be connected the fastening between pipe fitting and the water pipe head, can not have the phenomenon of leaking.
Furthermore, before the steel mesh sheets in the middle are bound, the water circulation units are connected together through horizontal connecting rods. Like this, horizontal connecting rod can form a whole after connecting each hydrologic cycle unit for the hydrologic cycle support is more steady.
Furthermore, the horizontal connecting rods are connected to the intersecting positions of the vertical pipes and the transverse pipes and form horizontal support for the steel bar net piece together with the transverse pipes. Like this, horizontal connecting rod set up the position and violently manage and be in same height, and then form the support to reinforcing bar net piece together with violently managing, make reinforcing bar net piece installation back structure more firm, form a whole with hydrologic cycle support together.
Furthermore, each square formed by each horizontal pipe and each vertical pipe in each water circulation unit is connected with at least one diagonal rod. Thus, the provided diagonal rods can further increase the strength of the water circulation unit, so that the water circulation unit is not deformed or falls off when concrete is poured.
Furthermore, a temperature control switch is arranged at the water inlet connected with each water circulation unit. Therefore, when the concrete temperature control device is used, the temperature control switch is turned on according to the set temperature value after the concrete temperature is higher than the set temperature value, the water circulation cooling is realized, and the temperature control switch is turned off after the concrete temperature is reduced to the set temperature value, so that the whole water circulation line is turned off. This kind of mode can realize automatic control, reduces workman's operation.
Furthermore, the difference between the internal temperature and the external surface temperature of the mass concrete is not more than 25 ℃, the difference between the external surface temperature and the environmental temperature of the mass concrete is controlled within 20 ℃, and the internal temperature of the mass concrete is controlled within 25 ℃. Therefore, after the internal and surface temperatures of the mass concrete are effectively controlled, the cracking phenomenon of the concrete can be effectively controlled.
Drawings
FIG. 1 is a schematic structural diagram of a water circulation bracket on which a reinforcing mesh is laid in the embodiment;
FIG. 2 is a schematic view of an installation structure of a water circulation bracket in the embodiment;
FIG. 3 is a schematic view showing an installation structure of a water circulation unit in the embodiment;
FIG. 4 is a schematic perspective view of the pipe clamp of the embodiment;
FIG. 5 is a schematic diagram showing a disassembled structure of the pipe clamp in the example.
In the figure: the water circulation device comprises a water circulation unit 1, a transverse pipe 11, a vertical pipe 12, a water pipe joint 13, a water inlet 14, a water outlet 15, an inclined rod 16, a steel bar net piece 2, a water inlet pipe 3, a water pump 4, a water storage tank 5, a water outlet pipe 6, a horizontal connecting rod 7, a pipe hoop 8, an arc-shaped bent plate 81, a clamping plate 82, an arc-shaped groove 83, a clamping space 84, a connecting protrusion 85, a rotating shaft 86, a connecting piece 87 and a circular clamping groove 88.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example (b):
as shown in fig. 1 to fig. 3, the mass concrete construction process for preventing the mass concrete from cracking provided by the embodiment includes the following steps: s1, calculating the load of each reinforcing mesh in the mass concrete structure in unit area according to the area of the site to be constructed and the thickness of concrete, and drawing an installation structure schematic diagram of the water circulation control system according to the load and the laying range of the reinforcing meshes; s2, prefabricating a water circulation support in a factory according to the installation structure schematic diagram of the water circulation control system in S1, wherein the water circulation support comprises a plurality of water circulation units 1 arranged at intervals, each water circulation unit 1 is internally provided with a latticed water flow channel, the latticed water flow channels are internal channels formed by connecting a plurality of transverse pipes 11 and vertical pipes 12, and the transverse pipes 11 positioned at the same horizontal position form a reinforcing mesh supporting layer; the upper left corner and the upper right corner of each grid-shaped water flow channel are respectively provided with a water inlet 14 and a water outlet 15 which are communicated with the water flow channels inside the grid-shaped water flow channels; s3, lofting the plane size of the mass concrete on a flat ground by using a measuring instrument and marking the installation position of each water circulation unit in the plane; s4, laying and binding bottom layer steel bar net pieces 2 in place, and after acceptance and acceptance, welding the bottoms of the water circulation units 1 and the bottom layer steel bar net pieces 2 together according to the installation positions of the water circulation units 1 marked on the ground; s5, at least one temperature sensor is fixedly arranged on each reinforcing steel mesh supporting layer of each water circulation unit 1; s6, binding the reinforcing mesh sheets 2 on each reinforcing mesh sheet supporting layer by layer from bottom to top; s7; connecting the water inlet 14 of each water circulation unit 1 with a water pump 4 through a water inlet pipe 3, and connecting the water inlet 14 with an external reservoir 5 through the water pump 4, and simultaneously connecting the water outlet 15 of each water circulation unit 1 with the reservoir 5 through a water outlet pipe 6 to form a plurality of water circulation water paths; s8, dividing bins and pouring concrete in layers; and S9, after the concrete pouring of each layer is finished, according to the temperature monitored by each temperature sensor, continuously cooling the interior of the concrete by using a water pump, and simultaneously, preserving heat, moisturizing and curing the mass concrete.
In order to further improve the concrete temperature of each layer of the transverse pipe 11 of each water circulation unit 1, the concrete temperature is accurately controlled, and during the concrete implementation, a temperature control valve can be arranged at the position, close to the outer end, of each layer of the transverse pipe 11, and the water flow path is controlled by opening and closing the temperature control valve.
Specifically, the horizontal pipes 11 and the vertical pipes 12 of each water circulation unit 1 in this embodiment are connected by water pipe joints 13, and the water pipe joints 13 are two-way joints, three-way joints or four-way joints according to the number of the horizontal pipes and the vertical pipes to be communicated.
As shown in fig. 3-5, an annular mounting plate is provided at each end of the horizontal pipe 11 and each end of the vertical pipe 12, the horizontal pipe 11 and the water pipe connector 13 and the vertical pipe 12 and the water pipe connector 13 are connected and fixed by a pipe clamp 8, and the pipe clamp 8 comprises two semicircular upper pipe clamps and lower pipe clamps; one end of the upper pipe hoop and one end of the lower pipe hoop are rotatably connected through a rotating shaft 86, the other end of the upper pipe hoop and the other end of the lower pipe hoop are fixedly connected through a connecting piece 87, and a circular clamping groove 88 concentric with the pipe hoop is formed inside the upper pipe hoop and the lower pipe hoop after the upper pipe hoop and the lower pipe hoop are connected; the annular mounting disc of the horizontal pipe 11 or the vertical pipe 12 and the arc-shaped mounting disc at the end of the water pipe joint 13 corresponding to the horizontal pipe 11 or the vertical pipe 12 are arranged in the circular clamping groove 88, and the circular clamping groove 88 formed by encircling the upper pipe hoop and the lower pipe hoop is clamped and fixed. Specifically, the upper pipe hoop and the lower pipe hoop are both composed of an arc-shaped bent plate 81 and clamping plates 82 arranged on two sides of the arc-shaped bent plate 81, and the inner sides of the two clamping plates 82 extend out of the inner side of the arc-shaped bent plate 81 to form an arc-shaped groove 83 together with the arc-shaped bent plate 81; one side of the arc-shaped bent plate 81 is arranged in the two clamping plates 82, a clamping space 84 is formed together with the end parts of the two clamping plates 82, and the other side of the arc-shaped bent plate extends out of the two clamping plates 82 to form a connecting bulge 85; the connecting bulge 85 of the upper pipe clamp is clamped in the clamping space 84 of the lower pipe clamp, and the rotating connection is realized by the rotating shaft 86 penetrating through the end parts of the two clamping plates 82 of the lower pipe clamp and the connecting bulge 85 of the upper pipe clamp; the coupling protrusion 85 of the lower pipe clamp is placed in the clamping space 84 of the upper pipe clamp, and is fixed together by the coupling member 87 after passing through the ends of the clamping plates 82 of the upper pipe clamp and the coupling protrusion 85 of the lower pipe clamp. The clamping space 84 in this embodiment is inserted into the connecting protrusion 85, and then forms a circular slot 88 together with the two arc-shaped slots 83. The coupling projection 85 has a projection arc length corresponding to the arc length of the clamping space 84. In addition, the two clamping plates 82 form a circular ring after the upper pipe hoop and the lower pipe hoop are encircled, and the inner hollow diameter of the circular ring is matched with the outer diameter of a horizontal pipe or a vertical pipe or a water pipe joint.
In order to improve the stability of the water circulation support, the water circulation units 1 can be connected together by a horizontal connecting rod 7 before the middle reinforcing mesh 2 is bound. The horizontal connecting rods 7 are connected at the intersecting positions of the vertical pipes 12 and the transverse pipes 11, and form horizontal support for the steel bar meshes together with the transverse pipes 11. At least one diagonal bar 16 is connected to each of the squares formed by the respective horizontal and vertical pipes 11 and 12 in each of the water circulation units 1.
The difference between the internal temperature and the external surface temperature of the mass concrete is not more than 25 ℃, the difference between the external surface temperature and the environmental temperature of the mass concrete is controlled within 20 ℃, and the internal temperature of the mass concrete is controlled within 25 ℃. A temperature control switch is arranged at the water inlet 14 connected with each water circulation unit 1.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the present invention has been described in detail by referring to the preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (8)
1. A large-volume concrete construction process for preventing large-volume concrete from cracking is characterized by comprising the following steps: s1, calculating the load of each reinforcing mesh in the mass concrete structure in unit area according to the area of the site to be constructed and the thickness of concrete, and drawing an installation structure schematic diagram of the water circulation control system according to the load and the laying range of the reinforcing meshes; s2, prefabricating a water circulation support in a factory according to the installation structure schematic diagram of the water circulation control system in S1, wherein the water circulation support comprises a plurality of water circulation units (1) arranged at intervals, a latticed water flow channel is arranged in each water circulation unit (1), the latticed water flow channels are formed by connecting a plurality of transverse pipes (11) and vertical pipes (12), and the transverse pipes (11) located at the same horizontal position form a reinforcing mesh supporting layer; the upper end of each grid-shaped water flow channel is respectively provided with a water inlet (14) and a water outlet (15) which are communicated with the water flow channel inside the grid-shaped water flow channel; s3, lofting the plane size of the mass concrete on a flat ground by using a measuring instrument and marking the installation position of each water circulation unit in the plane; s4, laying bottom layer steel bar meshes (2), binding and positioning, and welding the bottoms of the water circulation units (1) and the bottom layer steel bar meshes (2) together according to the installation positions of the water circulation units (1) marked on the ground after acceptance and acceptance; s5, at least one temperature sensor is fixedly arranged on each reinforcing mesh supporting layer of each water circulation unit (1); s6, binding the reinforcing mesh sheets (2) on each reinforcing mesh sheet supporting layer by layer from bottom to top; s7; connecting a water inlet (14) of each water circulation unit (1) with a water pump (4) through a water inlet pipe (3), and connecting the water inlet with an external reservoir (5) through the water pump (4), and simultaneously connecting a water outlet (15) of each water circulation unit (1) with the reservoir (5) through a water outlet pipe (6) to form a plurality of water circulation water paths; s8, dividing bins and pouring concrete in layers; and S9, after the concrete pouring of each layer is finished, according to the temperature monitored by each temperature sensor, continuously cooling the interior of the concrete by using a water pump, and simultaneously, preserving heat, moisturizing and curing the mass concrete.
2. The mass concrete construction process for preventing the mass concrete from cracking according to claim 1, wherein the horizontal pipes (11) and the vertical pipes (12) of each water circulation unit (1) are connected through water pipe joints (13), and the water pipe joints (13) are two-way joints or three-way joints or four-way joints according to the number of the horizontal pipes and the vertical pipes to be communicated.
3. The mass concrete construction process for preventing the mass concrete from cracking according to claim 2, wherein an annular mounting plate is arranged at each end of the horizontal pipe (11) and each end of the vertical pipe (12), the horizontal pipe (11) and the water pipe connector (13) and the vertical pipe (12) and the water pipe connector (13) are fixedly connected through a pipe hoop (8), and the pipe hoop (8) comprises two semicircular upper pipe hoops and semicircular lower pipe hoops; one end of the upper pipe hoop and one end of the lower pipe hoop are rotatably connected through a rotating shaft (85), the other end of the upper pipe hoop and the other end of the lower pipe hoop are fixedly connected through a connecting piece (87), and a circular clamping groove (88) concentric with the pipe hoop is formed inside the upper pipe hoop and the lower pipe hoop after the upper pipe hoop and the lower pipe hoop are connected; the annular mounting disc of the transverse pipe (11) or the vertical pipe (12) and the arc-shaped mounting disc at the corresponding end of the water pipe joint (13) and the transverse pipe (11) or the vertical pipe (12) are arranged in the circular clamping groove (88) and are clamped and fixed through the upper pipe hoop and the lower pipe hoop.
4. The mass concrete construction process for preventing the mass concrete from cracking according to the claim 1, 2 or 3, characterized in that, before the reinforcing mesh (2) in the middle is bound, the water circulation units (1) are connected together by the horizontal connecting rod (7).
5. The mass concrete construction process for preventing the mass concrete from cracking according to claim 4, wherein the horizontal connecting rods (7) are connected at the intersection positions of the vertical pipes (12) and the transverse pipes (11) and form horizontal supports for the steel bar meshes together with the transverse pipes (11).
6. The mass concrete construction process for preventing the mass concrete from cracking according to claim 1 or 2, wherein at least one diagonal bar (16) is connected to each square formed by each horizontal pipe (11) and vertical pipe (12) in each water circulation unit (1).
7. The mass concrete construction process for preventing the mass concrete from cracking according to claim 1 or 2, wherein a temperature control switch is arranged at the water inlet (14) connected with each water circulation unit (1).
8. The mass concrete construction process for preventing the mass concrete from cracking according to claim 1 or 2, wherein the difference between the internal temperature and the external temperature of the mass concrete is not more than 25 ℃, the difference between the external temperature and the ambient temperature of the mass concrete is controlled within 20 ℃, and the internal temperature of the mass concrete is controlled within 25 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356253A (en) * | 2021-05-29 | 2021-09-07 | 中铁建工集团有限公司 | Construction method of basic raft plate of super high-rise building |
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| CN112457051B (en) | 2023-07-25 |
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