CN108532606A - The temperature control method of mass concrete - Google Patents
The temperature control method of mass concrete Download PDFInfo
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- CN108532606A CN108532606A CN201810367873.4A CN201810367873A CN108532606A CN 108532606 A CN108532606 A CN 108532606A CN 201810367873 A CN201810367873 A CN 201810367873A CN 108532606 A CN108532606 A CN 108532606A
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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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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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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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses the temperature control methods of mass concrete comprising following steps：1, horizontal slice the first cooling water of arranged for interval pipe network, the second cooling water pipe network and the third cooling water pipe network successively from top to bottom in cushion cap, wherein the first cooling water pipe network and third cooling water pipe network are longitudinally arranged, the second cooling water pipe network lateral arrangement；2, temperature measuring point is arranged；3, temperature control is carried out to concrete.The arrangement and temperature control method of cooling water system of the present invention are designed according to the profiling temperatures inside mass concrete, can effectively reduce temperature difference between inside and outside concrete, reduce temperature stress, and concrete itself is avoided to crack；And connected by elastomer connector between heretofore described cooling water pipe, not only make connection more secured, rigid cooling water pipe can also be prevented to be destroyed due to expanding with heat and contract with cold and influence heat transfer effect.
Description
Technical field
The present invention relates to concrete construction fields.It is more particularly related to the temperature control method of mass concrete.
Background technology
In mass concrete, the temperature stress in mass concrete is to cause the most common original of concrete itself cracking
One of because, especially in the mass concrete construction phase, concrete hydrating forms amount of heat, if effectively cannot uniformly dissipate
Heat will form larger temperature stress, cause concrete cracking and cause quality accident.Therefore mass concrete temperature controls
Quality directly affects the construction quality of mass concrete, is the emphasis of mass concrete construction quality control, especially right
In the mass concrete of bearing load, Concrete temperature controlling is even more top priority.
Current industry generally uses the pre- embedded cooling water pipe inside mass concrete, leads and dissipates by concrete hydrating
The heat of generation.But the cooling water pipe arrangement used at present is to be evenly arranged, and is not accounted in practical concrete block
The profiling temperatures in portion reduce temperature difference between inside and outside concrete although controllable concrete internal temperature declines, due to heat dissipation
The difference of effect, concrete centre temperature is high, and boundary temperature is relatively low, is arranged, cannot effectively be dropped using equidistant water pipe
Low concrete internal difference in temperature, this internal difference in temperature will generate unfavorable temperature stress, have larger destructive power to concrete.It is mixed
Solidifying soil easy tos produce larger temperature stress under hydro-thermal temperature field action.
Invention content
The object of the present invention is to provide rational cooling water pipe arrangement system and to the regulation and control side of mass concrete temperature
Method carries out Effective Regulation to be risen to temperature after casting of concrete in mass, avoids mass concrete due to internal temperature stress is big
Cracking.
In order to realize these purposes and other advantages according to the present invention, the temperature control method of mass concrete is provided,
It includes the following steps：
Step 1: arrangement cooling water system：The layered arrangement cooling water system in cushion cap, the cooling water system include from
Arranged for interval cools down top to bottm in the first cooling water pipe network, the second cooling water pipe network and the third in cushion cap different level successively
Grid；
The first cooling water pipe network includes the first cooling water pipe, is longitudinally arranged in the cushion cap, both ends are set respectively
First water inlet and the first water outlet, and first cooling water pipe is class coiled pipe；
The second cooling water pipe network include the second cooling water pipe and third cooling water pipe, the two share the second water inlet and
Second water outlet, the second cooling water pipe and third cooling water pipe include sequentially connected inlet segment, interlude and water exit end,
In the second cooling water pipe inlet segment and interlude be class coiled pipe, water exit end is straight tube, and the inlet segment of third cooling water pipe is
Straight tube, interlude and water exit end are class coiled pipe, and the interlude of the second cooling water pipe and the interlude of third cooling water pipe interlock
Arrangement, the inlet segment of third cooling water pipe are set to the outside of the second cooling water pipe layout area, the water exit end of the second cooling water pipe
Set on the outside of the layout area of third cooling water pipe；
The third cooling water pipe network includes the 4th cooling water pipe, is longitudinally arranged in the cushion cap, both ends are set respectively
Third water inlet and third water outlet, and the 4th cooling water pipe is class coiled pipe；
Step 2: arrangement temperature measuring point：It is respectively provided with temperature sensor in the second water inlet and the second water outlet；And it is holding
Surface, centre and bottom surface temperature measuring point are set in platform, temperature sensor is respectively set in each temperature measuring point, are respectively used to detection surface coagulation
The temperature of soil, inner concrete and bottom surface concrete；
Step 3: carrying out temperature control to concrete, include the following steps：
S1：First water inlet and third water inlet are connected to the second water outlet, cooling water is from the second water inlet
It is passed through cooling water system, and flows out cooling water system from the first water outlet and third water outlet respectively；
S2：The inflow temperature for controlling the second cooling water pipe network, makes the water temperature of the second water inlet and the temperature of inner concrete
Difference is 23~25 DEG C；
S3：When the second water inlet and the second water outlet temperature difference reach 5 DEG C, by the first water inlet and third water inlet with
Second water outlet disconnects, and the first water outlet and third water outlet are connected to the second water inlet, and cooling water is from second
Water outlet is passed through cooling water system, and flows out cooling water system from the first water inlet and third water inlet respectively；
S4：When the temperature difference of the temperature of inner concrete and surface concrete is 17~20 DEG C, stop water flowing.
Preferably, the cooling water pipe of the cooling water system is all made of Φ 32 × 2.5mm seamless steel pipes.
Preferably, the first cooling water pipe network to cushion cap top surface distance is 0.5~1.0m, and third cooling water pipe network is extremely
Cushion cap bottom surface distance is 0.5~1.0m, and the vertical range between cooling water pipe network in adjacent level is 1.0~1.5m, together
Level interval between the adjacent water pipe of one cooling water pipe is 0.5~1.0m, outermost layer water pipe apart from the nearest edge of concrete 0.3~
0.7m, all inlet and outlet vertically draw top of concrete 0.5m or more.
Preferably, the detection cycle of each temperature sensor is 15min/ times.
Preferably, it is equipped with flow control valve in the inlet segment and water exit end of the second cooling water pipe and third cooling water pipe
And flow detector, make the cooling water flow in the second cooling water pipe and third cooling water pipe be by adjusting flow control valve
20~35L/min.
Preferably, there are gaps for the junction of two sections of cooling water pipes, and are connected by elastomer connector, the elastomer connector
Including casing and rubber tube, the both ends of rubber tube are sheathed on the outer wall of two sections of cooling water pipes respectively, and casing is sheathed on outside rubber tube,
The both ends of casing are equipped with a pair of of connection ring, the inner wall of the connection ring and the outer wall with a pair of of cooling water pipe respectively on its inner wall
It is threadedly coupled, is abutted respectively circumferentially arranged with a pair of of retainer ring, the both ends of rubber tube between the inner wall of casing and the outer wall of rubber tube
Between a pair of of retainer ring and the inner wall of cooling water pipe.
Preferably, the retainer ring is multi-section circular arc, and multi-section circular arc can be merged into an annulus, the outside of every section of retainer ring
Face is all provided with fluted, and one end of fastening bolt is embedded in the groove, and described sleeve pipe is equipped with through-hole, and the inwall processing of through-hole
There are the screw thread mating with fastening bolt, the other end of fastening bolt to be located at outside casing across the through-hole.
Preferably, it is equipped with sealing ring between the both ends of the rubber tube and the outer wall of cooling water pipe.
The present invention includes at least following advantageous effect：
1, heretofore described cooling water system design is reasonable, and the concrete centre temperature for just having poured completion is high, side
Boundary's temperature is relatively low, and in order to reduce temperature stress, cooling water system of the invention is divided into multilayer cooling water pipe network, cooling water from positioned at
Second cooling water pipe Netcom of middle layer enters, and respectively from positioned at top layer the first cooling water pipe network and positioned at the third of bottom it is cold
But grid flows out, and the cooling water pipe network heat exchange of middle layer is fast compared with top layer cooling water pipe network and bottom cooling water pipe network, can reduce
The temperature difference of inner concrete and surface concrete and bottom surface concrete；It, can be by the heat of inner concrete and when temperature is relatively low
It is transmitted to surface concrete and bottom surface concrete, insulation effect is played to surface concrete and ground concrete；
2, in heretofore described cooling water system, the second cooling water pipe network for being located at middle layer includes that second and third are cold
But water pipe, the two middle section interlaced arrangement can take away more heats that is, intensive by paracentral position distribution, and
Sparse in the position by proximal border, according to the high characteristic distributions of mass concrete center temperature, this arrangement exists
Be conducive to the temperature stress of reduction center concrete and boundary concrete；
3, heretofore described cooling water system, using the arrangement of the cooling water pipe network of multilayer, and adjacent two layers
Cooling water pipe network be respectively lateral arrangement and to be longitudinally arranged, keep inside concrete heat exchange uniform；
4, it is connected using elastomer connector between two sections of cooling water pipes in the present invention, not only makes connection more secured, and by
There is good telescopicing performance in the rubber tube in elastomer connector, can prevent rigid cooling water pipe from being broken due to expanding with heat and contract with cold
It is bad, to influence the cooling effect of cooling water system.
Part is illustrated to embody by further advantage, target and the feature of the present invention by following, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the layout drawing of the first cooling water pipe network of the present invention；
Fig. 2 is the layout drawing of the second cooling water pipe network of the present invention；
Fig. 3 is the layout drawing of third cooling water pipe network of the present invention；
Fig. 4 is the structure chart of elastomer connector of the present invention；
Fig. 5 is the layout drawing of cooling water system described in comparative example 1.
Reference sign：
1- the first cooling water pipe networks；The first cooling water pipes of 11-；The first water inlets of 12-；The first water outlets of 13-；2- second is cold
But grid；The second cooling water pipes of 21-；22- third cooling water pipes；The second water inlets of 23-；The second water outlets of 24-；3- thirds are cold
But grid；The 4th cooling water pipes of 31-；32- third water inlets；33- third water outlets；4- cooling water pipes；41- casings；42- rubbers
Sebific duct；43- retainer rings；44- fastening bolts；45- sealing rings；46- connection rings；51- water inlets；52- water outlets.
Specific implementation mode
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art with reference to specification text
Word can be implemented according to this.
It should be noted that experimental method described in following embodiments is unless otherwise specified conventional method, institute
Reagent and material are stated, unless otherwise specified, is commercially obtained；In the description of the present invention, term " transverse direction ", " vertical
To ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", the instructions such as "outside" side
Position or position relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present invention and simplification of the description,
It is not instruction or implies that signified device or element must have a particular orientation, with specific azimuth configuration and operation, because
This is not considered as limiting the invention.
As shown in Figs 1-4, the present invention provides the temperature control method of mass concrete comprising following steps：
Step 1: arrangement cooling water system：Cooling water system, the cooling water system packet are arranged in horizontal slice in cushion cap
Include from top to bottom successively arranged for interval in the first cooling water pipe network 1, the second cooling water pipe network 2 and third in cushion cap different level
Cooling water pipe network 3；
The first cooling water pipe network 1 includes the first cooling water pipe 11, is longitudinally arranged in the cushion cap, both ends are distinguished
If the first water inlet 12 and the first water outlet 13, and first cooling water pipe 11 is class coiled pipe；
The second cooling water pipe network 2 include the second cooling water pipe 21 and third cooling water pipe 22, the two share second into
The mouth of a river 23 and the second water outlet 24, the second cooling water pipe 21 and third cooling water pipe 22 include sequentially connected inlet segment, in
Between section and water exit end, wherein the inlet segment and interlude of the second cooling water pipe 21 be class coiled pipe, water exit end is straight tube, and third is cold
But the inlet segment of water pipe 22 is straight tube, and interlude and water exit end are class coiled pipe, the interlude and third of the second cooling water pipe 21
The inlet segment of the interlude interlaced arrangement of cooling water pipe 22, third cooling water pipe 22 is set to 21 layout area of the second cooling water pipe
Outside, the water exit end of the second cooling water pipe 21 are set to the outside of the layout area of third cooling water pipe 22；
The third cooling water pipe network 3 includes the 4th cooling water pipe 31, is longitudinally arranged in the cushion cap, both ends are distinguished
If third water inlet 32 and third water outlet 33, and the 4th cooling water pipe 31 is class coiled pipe；
Step 2: arrangement temperature measuring point：It is respectively provided with temperature sensor at the second water inlet 23 and the second water outlet 24；And
Surface, centre and bottom surface temperature measuring point are set in cushion cap, temperature sensor is respectively set in each temperature measuring point, are respectively used to detection surface
The temperature of concrete, inner concrete and bottom surface concrete；
Step 3: carrying out temperature control to concrete, include the following steps：
S1：First water inlet 12 and third water inlet 32 are connected to the second water outlet 24, cooling water is from second
Water inlet 23 is passed through cooling water system, and flows out cooling water system from the first water outlet 13 and third water outlet 33 respectively；
S2：The inflow temperature for controlling the second cooling water pipe network 2 makes water temperature at the second water inlet 23 and inner concrete
The temperature difference is 23~25 DEG C；
S3：When the second water inlet 23 and 24 temperature difference of the second water outlet reach 5 DEG C, the first water inlet 12 and third are intake
Mouth 32 is disconnected with the second water outlet 24, and the first water outlet 13 and third water outlet 33 are connected with the second water inlet 23
Logical, cooling water is passed through cooling water system from the second water outlet 24, and is flowed respectively from the first water inlet 12 and third water inlet 32
Go out cooling water system；
S4：When the temperature difference of the temperature of inner concrete and surface concrete is 17~20 DEG C, stop water flowing.
In the above-mentioned technical solutions：
Step 1: horizontal slice arranges that cooling water system, the cooling water system include from top to bottom successively in cushion cap
Arranged for interval in the first cooling water pipe network 1, the second cooling water pipe network 2 and third cooling water pipe network 3 in cushion cap different level, wherein
First cooling water pipe network 1 is located at concrete centre, third cooling water pipe close to concrete surface, the second cooling water pipe network 2
Net 3 is close to concrete bottom, since the Temperature Distribution of mass concrete is higher and not fugitive closer to center temperature
Heat will be positioned at the second cooling water pipe network 2 of middle layer in order to reduce the temperature stress between center concrete and surrounding concrete
Be arranged to it is intensive compared with the first cooling water pipe network 1 and third cooling water pipe network 3, the second cooling water pipe network 2 include second cooling
Water pipe 21 and third cooling water pipe 22, the two shares the second water inlet 23 and the second water outlet 24, and the middle section of the two is handed over
Mistake arrangement, can play center concrete better cooling effect；And the first cooling water pipe network 1 and third cooling water pipe network
3 are longitudinally arranged, 2 lateral arrangement of the second cooling water pipe network, using by the cooling water pipe floor projection in different level as right-angled intersection
Structure can make inside concrete heat exchange evenly, avoid the occurrence of white space；In preferred technical solution, first
The installation position of water inlet 12 and third water inlet 32 is located at straight line with the second water outlet 24 in the vertical direction, and first
Water outlet 13 and third water outlet 33 are located at straight line with the second water inlet 23 in the vertical direction, in order to subsequently control
During temperature, it may be convenient to adjust inflow and outflow mode；
Step 2: arrangement temperature measuring point：It is respectively provided with temperature sensor at the second water inlet 23 and the second water outlet 24, respectively
The water temperature at water temperature and the second water outlet 24 for detecting the second water inlet 23；And set in cushion cap surface, centre and
Bottom surface temperature measuring point, and temperature sensor is respectively set in each temperature measuring point, be respectively used to detection surface concrete, inner concrete and
The temperature of lower concrete；
Step 3: carrying out temperature control to concrete：After the completion of concreting, since the temperature of inner concrete is higher than surface
Cooling water is passed through cooling water system by concrete and lower concrete from the second cooling water pipe network 2, and respectively from the first cooling water
Pipe network 1 and third cooling water pipe network 3 flow out, and according to the temperature difference of the second water inlet 23 and the second water outlet 24, periodically by the
The inlet and outlet of two cooling water pipe networks 2 are exchanged, and are changed simultaneously the water (flow) direction in entire cooling water system, are prevented
Inside concrete generates the larger temperature difference.
In another technical solution, the cooling water pipe of the cooling water system is all made of Φ 32 × 2.5mm seamless steel pipes.
In another technical solution, the first cooling water pipe network 1 to cushion cap top surface distance is 0.5~1.0m, third
Cooling water pipe network 3 to cushion cap bottom surface distance is 0.5~1.0m, and the vertical range between cooling water pipe network in adjacent level is
1.0~1.5m, the level interval between the adjacent water pipe of same cooling water pipe is 0.5~1.0m, and outermost layer water pipe is apart from concrete
Nearest 0.3~0.7m of edge, all inlet and outlet vertically draw top of concrete 0.5m or more.
In another technical solution, the detection cycle of each temperature sensor is 15min/ times.
It is equal in the inlet segment and water exit end of the second cooling water pipe 21 and third cooling water pipe 22 in another technical solution
Equipped with flow control valve and flow detector, make the second cooling water pipe 21 and third cooling water pipe by adjusting flow control valve
Cooling water flow is 20~35L/min in 22.
In another technical solution, there are gaps for the junction of two sections of cooling water pipes 4, and are connected by elastomer connector,
The elastomer connector includes casing 41 and rubber tube 42, and the both ends of rubber tube 42 are sheathed on the outer wall of two sections of cooling water pipes 4 respectively,
Casing 41 is sheathed on outside rubber tube 42, and the both ends of casing 42 are equipped with a pair of of connection ring 46 on its inner wall, the connection ring 46
Inner wall with connect respectively with the outer wall thread of a pair of of cooling water pipe 4, along week between the inner wall and the outer wall of rubber tube 42 of casing 41
It is connected to respectively between a pair of of retainer ring 43 and the inner wall of cooling water pipe 4 to the both ends equipped with a pair of of retainer ring 43, rubber tube 42.
In the above-mentioned technical solutions, since rubber tube 42 is due to having elasticity, deformation caused by expanding with heat and contract with cold can be played
Compensating action, the gap between rubber tube 42 and casing 42 are that expanding with heat and contract with cold for rubber tube 42 provides space, and casing 42 is used for
Increasing the rigidity and fastness of structure, retainer ring 43 will respectively compress at the both ends of rubber tube 42 to the outer wall of two sections of cooling water pipes 4,
Prevent leak；In preferred technical solution, the end of rubber tube 42 is also connected ring 46 and compresses and be fixed on cooling water respectively
The outer wall of pipe 4, so that structure is more stable.
In another technical solution, the retainer ring 43 is multi-section circular arc, and multi-section circular arc can be merged into an annulus, often
The lateral surface of section retainer ring 43 is all provided with fluted, and one end of fastening bolt 44 is embedded in the groove, and described sleeve pipe 41 is equipped with logical
Hole, and the inwall processing of through-hole has the screw thread mating with fastening bolt 44, the other end of fastening bolt 44 to pass through the through-hole position
In outside casing 41；In this technical solution, retainer ring 43 can be compressed by rubber tube 42 by fastening bolt 44, prevent cooling water from rubber
Outflow in sebific duct 42.
In another technical solution, sealing is equipped between the both ends and the outer wall of cooling water pipe 4 of the rubber tube 42
Circle 45, prevents cooling water from leaking.
Embodiment 1：
In the work progress of A engineerings, temperature control is carried out to mass concrete using following methods：
Step 1: the arrangement according to the present invention, arranges cooling water system, wherein the first cooling water pipe network 1 to
Cushion cap top surface distance is 0.5m, and third cooling water pipe network 3 to cushion cap bottom surface distance is 0.5m, the cooling water pipe network in adjacent level
Between vertical range be 1.5m, the level interval between the adjacent water pipe of same cooling water pipe be 1.0m, outermost layer water pipe away from
Edge 0.5m nearest from concrete, all inlet and outlet vertically draw top of concrete 0.5m or more；Cooling water
Pipe is all made of Φ 32 × 2.5mm seamless steel pipes, the elastomer connector connection through the invention between cooling water pipe 4；It is cold second
But the inlet segment and water exit end of water pipe 21 and third cooling water pipe 22 are equipped with flow control valve and flow detector, pass through tune
Throttling control valve makes cooling water flow in the second cooling water pipe 21 and third cooling water pipe 22 be 30L/min；
Step 2: the arrangement, arrangement temperature measuring point wherein set surface, centre and bottom according to the present invention in cushion cap
Face temperature measuring point, temperature measuring point be respectively away from concrete surface 50mm, concrete center and away from concrete bottom 50mm at, in each thermometric
Temperature sensor is respectively set in point, is respectively used to the temperature of detection surface concrete, inner concrete and lower concrete；Detection
Period is 15min/ times；
Step 3: after the completion of concreting, the method, temperature control is carried out to concrete according to the present invention；
28~35 DEG C of environment temperature, 29.8 DEG C of concrete molding temperature, after pouring completion about 48 hours, inner concrete reaches
To 65.3 DEG C of maximum temperature, the temperature of surface concrete is 47.5 DEG C, 56.2 DEG C of the temperature of lower concrete, inner concrete with
The maximum temperature difference of surface concrete is 24.8 DEG C；
Cooling water system inflow temperature is 34~41 DEG C, and temperature control is after 96 hours, and the temperature of inner concrete is 57.4 DEG C, table
The temperature of surface concrete is 39.3 DEG C, 48.5 DEG C of the temperature of lower concrete, and the temperature difference of inner concrete and surface concrete is
18.1 DEG C, the temperature difference with lower concrete is 8.9 DEG C.
Comparative example 1：
In the work progress of B engineerings, temperature control is carried out to mass concrete using following methods：
Step 1: arrangement cooling water system：As shown in figure 5, horizontal in cushion cap divide three layers of arranged for interval cooling water successively
Pipe network, cooling water pipe is class coiled pipe, and is sequentially communicated from top to bottom, and the both ends of cooling water pipe set water inlet 51 and water outlet respectively
Mouth 52, wherein water inlet 51 are set to bottom, and water outlet 52 is set to top layer；
Wherein top cooling water pipe network to cushion cap top surface distance be 0.5m, bottom cooling water pipe network to cushion cap bottom surface away from
From for 0.5m, the vertical range between cooling water pipe network in adjacent level is 1.5m, the adjacent water pipe of same cooling water pipe
Between level interval be 1.0m, outermost layer water pipe vertically draws apart from the nearest edge 0.5m of concrete, inlet and outlet
Top of concrete 0.5m or more；Cooling water pipe is all made of Φ 32 × 2.5mm seamless steel pipes；Inlet and outlet are equipped with flow
Regulating valve and flow detector make cooling water flow be 30L/min by adjusting flow control valve；
Step 2: arrangement temperature measuring point：Temperature sensor is respectively provided at inlet and outlet；And table is set in cushion cap
Face, centre and bottom surface temperature measuring point, wherein set surface, centre and bottom surface temperature measuring point in cushion cap, temperature measuring point is respectively away from concrete table
Face 50mm, concrete center and away from concrete bottom 50mm at, temperature sensor is respectively set in each temperature measuring point, is respectively used to examine
Survey the temperature of surface concrete, inner concrete and lower concrete；
Step 3: carrying out temperature control to concrete, include the following steps：
(1) cooling water is passed through cooling water system from water inlet, flows out cooling water system from water outlet；
(2) water temperature of control water inlet and the temperature difference of inner concrete are 23~25 DEG C；
(3) when water inlet and the water outlet temperature difference reach 5 DEG C, inlet and outlet are exchanged；
(4) when the temperature difference of the temperature of inner concrete and surface concrete is 17~20 DEG C, stop water flowing.
28~35 DEG C of environment temperature, 29.7 DEG C of concrete molding temperature, after pouring completion about 48 hours, inner concrete reaches
To 68.7 DEG C of maximum temperature, the temperature of surface concrete is 49.2 DEG C, 52.6 DEG C of the temperature of lower concrete, inner concrete with
The maximum temperature difference of surface concrete is 27.5 DEG C；
Cooling water system inflow temperature is 34~41 DEG C, and temperature control is after 96 hours, and the temperature of inner concrete is 61.2 DEG C, table
The temperature of surface concrete is 42.6 DEG C, 45.8 DEG C of the temperature of lower concrete, and the temperature difference of inner concrete and surface concrete is
18.6 DEG C, the temperature difference with lower concrete is 15.4 DEG C.
By embodiment 1 and comparative example 1 it is found that in the case where execution conditions are essentially identical, utilization is heretofore described
The temperature control method of mass concrete carries out temperature control to concrete, and the temperature of inner concrete declines comparatively fast, and mixed with surface
The temperature difference for coagulating soil is obviously reduced, thus the temperature control method of heretofore described mass concrete can be reduced effectively inside and outside concrete
The temperature difference reduces temperature stress, ensures construction quality, improves construction efficiency.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (8)
1. the temperature control method of mass concrete, which is characterized in that include the following steps：
Step 1: arrangement cooling water system：The layered arrangement cooling water system in cushion cap, the cooling water system include on to
Under successively arranged for interval in the first cooling water pipe network, the second cooling water pipe network and third cooling water pipe in cushion cap different level
Net；
The first cooling water pipe network includes the first cooling water pipe, is longitudinally arranged in the cushion cap, both ends set first respectively
Water inlet and the first water outlet, and first cooling water pipe is class coiled pipe；
The second cooling water pipe network includes the second cooling water pipe and third cooling water pipe, and the two shares the second water inlet and second
Water outlet, the second cooling water pipe and third cooling water pipe include sequentially connected inlet segment, interlude and water exit end, wherein the
The inlet segment and interlude of two cooling water pipes are class coiled pipe, and water exit end is straight tube, and the inlet segment of third cooling water pipe is straight tube,
Interlude and water exit end are class coiled pipe, the interlude of the second cooling water pipe and the interlude interlaced arrangement of third cooling water pipe,
The inlet segment of third cooling water pipe is set to the outside of the second cooling water pipe layout area, and the water exit end of the second cooling water pipe is set to the
The outside of the layout area of three cooling water pipes；
The third cooling water pipe network includes the 4th cooling water pipe, is longitudinally arranged in the cushion cap, both ends set third respectively
Water inlet and third water outlet, and the 4th cooling water pipe is class coiled pipe；
Step 2: arrangement temperature measuring point：It is respectively provided with temperature sensor in the second water inlet and the second water outlet；And in cushion cap
If surface, centre and bottom surface temperature measuring point, temperature sensor is respectively set in each temperature measuring point, be respectively used to detection surface concrete,
The temperature of inner concrete and bottom surface concrete；
Step 3: carrying out temperature control to concrete, include the following steps：
S1：First water inlet and third water inlet are connected to the second water outlet, cooling water is passed through from the second water inlet
Cooling water system, and respectively cooling water system is flowed out from the first water outlet and third water outlet；
S2：The inflow temperature of the second cooling water pipe network is controlled, the temperature difference of the water temperature and inner concrete that make the second water inlet is
23~25 DEG C；
S3：When the second water inlet and the second water outlet temperature difference reach 5 DEG C, by the first water inlet and third water inlet with second
Water outlet disconnects, and the first water outlet and third water outlet are connected to the second water inlet, and cooling water is discharged from second
Mouth is passed through cooling water system, and flows out cooling water system from the first water inlet and third water inlet respectively；
S4：When the temperature difference of the temperature of inner concrete and surface concrete is 17~20 DEG C, stop water flowing.
2. the temperature control method of mass concrete as described in claim 1, which is characterized in that the cooling of the cooling water system
Water pipe is all made of Φ 32 × 2.5mm seamless steel pipes.
3. the temperature control method of mass concrete as described in claim 1, which is characterized in that the first cooling water pipe network is extremely
Cushion cap top surface distance is 0.5~1.0m, and third cooling water pipe network to cushion cap bottom surface distance is 0.5~1.0m, in adjacent level
Vertical range between cooling water pipe network is 1.0~1.5m, and the level interval between the adjacent water pipe of same cooling water pipe is 0.5
~1.0m, outermost layer water pipe are vertically drawn mixed apart from the nearest 0.3~0.7m of edge of concrete, all inlet and outlet
Solidifying soil top surface 0.5m or more.
4. the temperature control method of mass concrete as described in claim 1, which is characterized in that each temperature sensor
Detection cycle is 15min/ times.
5. the temperature control method of mass concrete as described in claim 1, which is characterized in that in the second cooling water pipe and third
The inlet segment and water exit end of cooling water pipe are equipped with flow control valve and flow detector, make the by adjusting flow control valve
Cooling water flow is 20~35L/min in two cooling water pipes and third cooling water pipe.
6. the temperature control method of mass concrete as claimed in claim 2, which is characterized in that the junction of two sections of cooling water pipes
There are gaps, and are connected by elastomer connector, and the elastomer connector includes casing and rubber tube, and the both ends of rubber tube are arranged respectively
In the outer wall of two sections of cooling water pipes, casing is sheathed on outside rubber tube, and the both ends of casing are equipped with a pair of of connection ring, institute on its inner wall
It states the inner wall of connection ring and is connect respectively with the outer wall thread of a pair of of cooling water pipe, between the inner wall of casing and the outer wall of rubber tube
Circumferentially arranged with a pair of of retainer ring, the both ends of rubber tube are connected to respectively between a pair of of retainer ring and the inner wall of cooling water pipe.
7. the temperature control method of mass concrete as claimed in claim 6, which is characterized in that the retainer ring is multi-section circular arc,
And multi-section circular arc can be merged into an annulus, the lateral surface of every section of retainer ring is all provided with fluted, and one end of fastening bolt is embedded in institute
State groove, described sleeve pipe is equipped with through-hole, and the inwall processing of through-hole has a screw thread mating with fastening bolt, fastening bolt it is another
One end is located at across the through-hole outside casing.
8. the temperature control method of mass concrete as claimed in claim 6, which is characterized in that the both ends of the rubber tube with it is cold
But it is equipped with sealing ring between the outer wall of water pipe.
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| CN109653205A (en) * | 2018-12-24 | 2019-04-19 | 江西恒信工程检测集团有限公司 | A kind of mass concrete maintenance process and its automation maintenance of equipment |
| CN109797719A (en) * | 2019-01-21 | 2019-05-24 | 北京通成达水务建设有限公司 | A kind of concrete pier casting process temperature control system and method |
| CN109837904A (en) * | 2019-03-05 | 2019-06-04 | 长江勘测规划设计研究有限责任公司 | Cooling water pipe one drags the inside concrete cooling system more arranged and its cooling means |
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| CN110259165A (en) * | 2019-06-12 | 2019-09-20 | 同济大学 | A kind of mass concrete self-loopa temperature control maintaining system and maintenance process |
| CN110847618A (en) * | 2019-10-23 | 2020-02-28 | 同济大学 | Large-volume concrete space three-dimensional mixed cooling system |
| CN110924418A (en) * | 2019-12-06 | 2020-03-27 | 湖北省路桥集团有限公司 | Large-volume cast-in-place special-shaped concrete bearing platform and construction method |
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| CN115419071A (en) * | 2022-09-06 | 2022-12-02 | 中建八局第一建设有限公司 | Large-volume concrete cooling system and construction method |
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| CN111221361A (en) * | 2018-11-27 | 2020-06-02 | 河北高达预应力科技有限公司 | Temperature control method for mass concrete construction |
| CN111221361B (en) * | 2018-11-27 | 2021-08-31 | 河北高达智能装备股份有限公司 | Temperature control method for mass concrete construction |
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| CN109653205B (en) * | 2018-12-24 | 2021-11-16 | 江西恒信工程检测集团有限公司 | Mass concrete curing method and automatic curing equipment thereof |
| CN109797719A (en) * | 2019-01-21 | 2019-05-24 | 北京通成达水务建设有限公司 | A kind of concrete pier casting process temperature control system and method |
| CN109837904A (en) * | 2019-03-05 | 2019-06-04 | 长江勘测规划设计研究有限责任公司 | Cooling water pipe one drags the inside concrete cooling system more arranged and its cooling means |
| CN110053147A (en) * | 2019-04-26 | 2019-07-26 | 浙江铁道建设工程有限公司 | A kind of comprehensive temperature control device of the steel form for reducing concrete structure crack-cooling water pipe |
| CN110259165A (en) * | 2019-06-12 | 2019-09-20 | 同济大学 | A kind of mass concrete self-loopa temperature control maintaining system and maintenance process |
| CN110847618A (en) * | 2019-10-23 | 2020-02-28 | 同济大学 | Large-volume concrete space three-dimensional mixed cooling system |
| CN110924418A (en) * | 2019-12-06 | 2020-03-27 | 湖北省路桥集团有限公司 | Large-volume cast-in-place special-shaped concrete bearing platform and construction method |
| CN112230690A (en) * | 2020-09-27 | 2021-01-15 | 中铁七局集团有限公司 | Mass concrete construction quality control method for pier-beam consolidation part of high-pier large-span bridge |
| CN113961025B (en) * | 2021-10-26 | 2022-06-24 | 海峡(福建)交通工程设计有限公司 | Temperature control system applied to large-volume concrete of lower bearing platform of swivel cable-stayed bridge |
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| CN115419071A (en) * | 2022-09-06 | 2022-12-02 | 中建八局第一建设有限公司 | Large-volume concrete cooling system and construction method |
| CN115419071B (en) * | 2022-09-06 | 2023-06-20 | 中建八局第一建设有限公司 | Large-volume concrete cooling system and construction method |
| CN115874831A (en) * | 2022-12-06 | 2023-03-31 | 中建八局第四建设有限公司 | Automatic temperature control method for mass concrete |
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