CN111980408A - Large-volume concrete cooling water circulation and construction method - Google Patents

Large-volume concrete cooling water circulation and construction method Download PDF

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Publication number
CN111980408A
CN111980408A CN202010843662.0A CN202010843662A CN111980408A CN 111980408 A CN111980408 A CN 111980408A CN 202010843662 A CN202010843662 A CN 202010843662A CN 111980408 A CN111980408 A CN 111980408A
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China
Prior art keywords
water
concrete
cooling tower
conveying pipeline
storage tank
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CN202010843662.0A
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CN111980408B (en
Inventor
朱曹旺
陈�胜
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China MCC17 Group Co Ltd
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China MCC17 Group Co Ltd
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Priority to CN202010843662.0A priority Critical patent/CN111980408B/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02Conveying or working-up concrete or similar masses able to be heaped or cast
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B1/00Methods or layout of installations for water supply
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means

Abstract

The invention discloses a cooling water circulation and construction method for mass concrete, which belongs to the field of mass concrete construction in constructional engineering and comprises a water circulation module and a water storage module, wherein the water circulation module comprises a conveying pipeline, the conveying pipeline is laid in a pouring pit, a water-stop wall is arranged along the upper surface of the pouring pit, and the water-stop wall is suitable for water storage and concrete maintenance; the water storage module comprises a branch flow pipe and a control piece, wherein an introduction port of the branch flow pipe is positioned between the water storage tank and the cooling tower, the branch flow pipe is suitable for leading water into the water-proof wall, the control piece is positioned at a port of the branch flow pipe, which is close to one end of the water storage tank, and the control piece is suitable for controlling the flow direction of the water of the branch flow pipe; the conveying pipeline is provided with a bulge part on the surface of the pouring pit, and the bulge part is suitable for conveying water of the water-stop wall into the conveying pipeline in the concrete along the water flow direction; the invention solves the problem that the crack is generated due to sudden temperature change caused by the large temperature difference generated by water storage curing of the concrete surface and water circulation in the concrete of the existing drainage pool.

Description

Large-volume concrete cooling water circulation and construction method
Technical Field
The invention belongs to the field of mass concrete construction in constructional engineering, and particularly relates to cooling water circulation and a construction method for mass concrete.
Background
The concrete pouring is an indelible link in the building engineering, and the quality of the concrete pouring is directly related to the overall quality of the building engineering. At this stage, the problem of large-volume concrete cracks is most common, which affects not only the appearance quality of the structure, but also the stability and integrity of the structure.
The inside pre-buried circulating pipe of traditional concrete is intake by the entry, and the export drainage, the retaining of brick drainage pond forms, because the maintenance is longer and the inside temperature of concrete is higher, can't accomplish the temperature control of circulating water for a long time and make effective cooling and measure to the inside temperature variation of concrete.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and solve the problem that cracks are generated due to sudden temperature changes caused by large temperature difference and rapid reduction because the surface of concrete is maintained by water storage in the existing brick drainage pool and water circulation is realized in the concrete.
In order to solve the technical problems, the inventor obtains the technical scheme of the invention through practice and summary, and the invention discloses a large-volume concrete cooling water circulation which comprises a pouring pit and a power supply after concrete is poured, and also comprises a water circulation module and a water storage module, wherein the water circulation module comprises a conveying pipeline, a water storage tank and a cooling tower, the conveying pipeline is paved in the pouring pit, the upper surface of the pouring pit is provided with a water-stop wall, and the water-stop wall is suitable for storing and curing concrete;
the water storage tank is provided with an output end and an input end, the output end conveys water into the cooling tower, the cooling tower cools the water at the output end of the water storage tank and outputs the cooled water into the conveying pipeline of the pouring pit, and the input end of the water storage tank conveys the water which passes through the concrete in the pouring pit back to the water storage tank;
the water storage module comprises a branch flow pipe and a control piece, wherein a branch flow pipe introduction opening is positioned between the water storage tank and the cooling tower, the branch flow pipe is suitable for leading water into the water-proof wall, the control piece is positioned at a port of the branch flow pipe, which is close to one end of the water storage tank, and the control piece is suitable for controlling the flow direction of the water of the branch flow pipe;
the top of pipeline is equipped with the bellying, the top of bellying is located and pours on the hole concrete, the pipeline of bellying is equipped with the fracture, the bellying is suitable for in the pipeline of water edge rivers direction transport entering concrete with the water of cut-off wall.
Preferably, water pumps are installed inside the water storage tank and the cooling tower, the conveying pipeline is connected with the water pumps, the water pumps are electrically connected with the power supply, embedded temperature sensors are installed on the surface of the conveying pipeline inside the pouring pit, and the embedded temperature sensors are suitable for measuring the surface temperature of the conveying pipeline;
a hose sleeve is arranged at the fracture of the protruding part, the hose sleeve is suitable for conveying cooling water along the water flow direction of a conveying pipeline, a first support frame is arranged at the lower end of the protruding part, the first support frame is located on the surface of concrete, and the first support frame is suitable for supporting and installing the hose sleeve;
and water temperature sensors are arranged at the water inlet and the water outlet of the cooling tower and are suitable for measuring the temperature of the water inlet and the water outlet of the cooling tower.
Preferably, first support frame includes lower carriage, arc upper carriage and spring, the lower carriage is hollow structure, the bottom and the concrete surface of lower carriage are connected, arc upper carriage and lower carriage sliding connection, the arc upper carriage is "Y" shape, arc upper carriage upper surface is the cambered surface, cambered surface and hose cover fixed connection, the spring is located the inboard of lower carriage, the one end and the arc upper carriage fixed connection of spring, the other end and the bottom of lower carriage of spring are connected.
Preferably, the arc upper frame is provided with a connecting hole, and the arc upper frame is provided with a connecting belt which penetrates through the connecting hole and is bound with the hose sleeve to be connected with two ends of the conveying pipeline.
Preferably, the water storage module further comprises a flow meter and a water outlet, wherein the flow meter is mounted on the branch pipe and is positioned behind the control piece along the water flow direction;
and a water level sensor is arranged on the water outlet and is suitable for measuring the height of the water level in the water-stop wall.
Preferably, the height of the water level sensor is higher than that of the water outlet.
Preferably, a second support frame is installed on the water-proof wall and is suitable for supporting the height of the shunt branch pipe installed on the water-proof wall.
Preferably, the conveying pipeline is distributed in the concrete in a serpentine shape, and the inflection point and the middle part of the conveying pipeline are both provided with embedded temperature sensors.
Preferably, the control part comprises a two-position three-way electromagnetic valve and a one-way valve, the two-position three-way electromagnetic valve is connected with the conveying pipeline and is connected with the water storage tank, the cooling tower and the branch flow pipe, the two-position three-way electromagnetic valve is communicated with the water storage tank and the cooling tower in a state that flowing water does not flow through the branch flow pipe, the two-position three-way electromagnetic valve is communicated with the water storage tank and the branch flow pipe in a state that flowing water does;
the one-way valve limits the one-way water from the two-position three-way electromagnetic valve to pass to the flowmeter.
Preferably, the construction method comprises the following steps:
the method comprises the following steps: embedding of embedded and embedded temperature sensor for completing conveying pipeline
A1, paving a conveying pipeline in the precast foundation pit after the installation of the bottom plate steel bars is finished according to calculation, wherein the conveying pipeline is distributed in a snake shape, and when the supporting force at the high position is insufficient, a support is erected to support the conveying pipeline;
a2: installing and fixing embedded temperature sensors with different depths according to the inflection point and the middle position calculated in the precast foundation pit;
a3: a fracture is formed in a convex part above a conveying pipeline in a precast foundation pit and is connected by a hose sleeve;
a4: one part of the conveying pipeline is respectively connected with a water outlet pipeline and a water storage tank in the un-poured foundation pit, and one part of the conveying pipeline is respectively connected with the water storage tank, the control piece, the cooling tower and the cooling tower to a pre-poured water inlet pipeline;
a5: the water inlet and the water outlet of the cooling tower are provided with water temperature sensors which are connected with the cooling tower and used for measuring the inlet and outlet speed and temperature of circulating water of the cooling tower;
a6, connecting the control part with the branch pipe, measuring the flow of the branch pipe through the one-way valve and the flowmeter, and installing the water level sensor;
a7: carrying out a ball passing experiment and an air tightness test, checking the integral fixation of the conveying pipeline, and mounting embedded steel bars;
step two: when concrete pouring construction is carried out
B1, pouring concrete into the pouring pit, wherein the pouring height of the concrete reaches the design height, and the height of the concrete is limited to 10 cm-20 cm below the convex part;
b2: injecting water into the water storage tank, opening water pumps in the cooling tower and the water storage tank and starting water circulation work, wherein the water temperatures of an inlet and an outlet of the cooling tower are monitored by a water temperature sensor, and the water temperatures and the circulation rate of the inlet and the outlet are controlled by the setting of the cooling tower;
step three: concrete pouring is completed, and circulating water cooling and maintenance are carried out
C1, laying bricks on the surface of the concrete to construct a water-stop wall after the concrete in the casting pit is static for 2 to 4 days;
c2, mounting a second support frame on the water-stop wall, and mounting the branch pipes on the second support frame;
c3, after the construction of the water-stop wall, breaking the fracture at the designed fracture of the bulge, adopting a hose sleeve connection part, installing a first support frame below the hose sleeve, bonding the arc-shaped upper frame with the hose sleeve, and connecting the lower frame with a concrete surface bolt;
c4, opening the two-position three-way electromagnetic valve to make the branch pipe pass through the flowing water, the flowmeter works and records the flow, the water outlet drains water until reaching the installation height of the water level sensor, the feedback signal controls the two-position three-way electromagnetic valve to turn to close the flow direction of the branch pipe, and the water in the water storage tank flows to the cooling tower in one way;
c3, monitoring the internal temperature of the concrete through an embedded temperature sensor, comparing the average value of all values with the temperature of a water outlet of a cooling tower, wherein the temperature difference between the inside and the outside is more than 5 ℃, and manually setting the water temperature and the water speed of an inlet and an outlet of the cooling tower to control the internal cooling rate of the concrete;
c4, stopping the water storage tank of the cooling tower when the water temperature at the water inlet is basically stable and the temperature difference between the inside and the outside does not exceed 5 ℃;
and C5, removing residual water in the conveying pipeline, and plugging and grouting the conveying pipeline.
The invention does not specifically describe a specific signal circulation flow and electrical connection, signals of the water level sensor and the embedded temperature sensor are collected by the controller and sent out instructions, a design display end displays specific data and inputs all design parameters before pouring, signal processing modes such as automatically adjusting the temperature of the cooling tower by unequal parameters and the like are realized, even a mobile phone APP is designed to realize WiFi control, and the method is the prior art, so the specific description is not repeated here.
Compared with the prior art, the invention can obtain the following technical effects:
the invention effectively monitors the internal temperature of the concrete during the construction and maintenance of the concrete by pre-burying the building temperature controller and the water temperature sensors at the water inlet and the water outlet of the cooling tower, and can adjust the temperature and the speed of circulating water through the cooling tower; set for the branch road drainage to the inside of water-stop wall of reposition of redundant personnel branch pipe and control, and install level sensor in the delivery port department of reposition of redundant personnel branch road, effective automatic retaining and control water level, set up hose cover connection fracture department and then get rid of the connection of hose cover, the cooling water of cooling tower delivery port is improved to the water of adoption water-stop wall, the inside and outside difference in temperature of having guaranteed the concrete is in setting for the within range, adjust the temperature of cooling tower, concrete temperature crack problem appears because of temperature variation effectively to prevent during the bulky concrete construction, it is difficult to have solved the job site water intaking simultaneously, the difficult problem of drainage is with low costs and ecological environmental protection.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a first installation schematic of the present invention;
FIG. 2 is a first support frame structure of the present invention;
FIG. 3 is a second installation schematic of the present invention;
fig. 4 is a partial enlarged view a of fig. 1 of the present invention.
In the figure: 1. pouring a pit; 2. a water-stop wall; 3. a water storage tank; 4. a cooling tower; 5. a branch pipe; 6. a one-way valve; 7. a boss portion; 8. an embedded temperature sensor; 9. a hose cover; 10. a first support frame; 11. a water temperature sensor; 12. putting down a rack; 13. arc-shaped upper frame; 14. a spring; 15. a flow meter; 16. a water level sensor; 17. a second support frame; 18. two-position three-way solenoid valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1 to 4: a large-volume concrete cooling water circulation comprises a pouring pit 1 and a power supply after concrete pouring, and further comprises a water circulation module and a water storage module, wherein the water circulation module comprises a conveying pipeline, a water storage tank 3 and a cooling tower 4, the conveying pipeline is laid in the pouring pit 1, a water-stop wall 2 is arranged on the upper surface of the pouring pit 1, and the water-stop wall 2 is suitable for storing water and curing concrete;
the water storage tank 3 is provided with an output end and an input end, the output end conveys water into the cooling tower 4, the cooling tower 4 cools the water at the output end of the water storage tank 3 and outputs the cooled water into the conveying pipeline of the casting pit 1, and the input end of the water storage tank 3 conveys the water which passes through the concrete in the casting pit 1 back to the water storage tank 3;
the water storage module comprises a branch flow pipe 5 and a control piece, an introduction port of the branch flow pipe 5 is positioned between the water storage tank 3 and the cooling tower 4, the branch flow pipe 5 is suitable for leading water into the water-stop wall 2, the control piece is positioned at a port of the branch flow pipe 5 close to one end of the water storage tank 3, and the control piece is suitable for controlling the flow direction of the water of the branch flow pipe 5;
the top of pipeline is equipped with bellying 7, and the top of bellying 7 is located pouring 1 concrete on, and the pipeline of bellying 7 is equipped with the fracture, and bellying 7 is suitable for in the pipeline of water edge water flow direction transport entering concrete with diaphragm wall 2.
Water pumps are arranged inside the water storage tank 3 and the cooling tower 4, the conveying pipeline is connected with the water pumps, the water pumps are electrically connected with the power supply, an embedded temperature sensor 8 is arranged on the surface of the conveying pipeline inside the pouring pit 1, and the embedded temperature sensor 8 is suitable for measuring the surface temperature of the conveying pipeline;
a hose sleeve 9 is installed at the fracture of the protruding portion 7, the hose sleeve 9 is suitable for conveying cooling water along the water flow direction of the conveying pipeline, a first support frame 10 is installed at the lower end of the protruding portion 7, the first support frame 10 is located on the surface of concrete, and the first support frame 10 is suitable for supporting and installing the hose sleeve 9;
the water temperature sensors 11 are arranged at the water inlet and the water outlet of the cooling tower 4, and the water temperature sensors 11 are suitable for measuring the temperature of the water inlet and the water outlet of the cooling tower 4.
First support frame 10 includes lower carriage 12, arc upper carriage 13 and spring 14, and lower carriage 12 is hollow structure, and the bottom and the concrete surface of lower carriage 12 are connected, arc upper carriage 13 and lower carriage 12 sliding connection, and arc upper carriage 13 is "Y" shape, and arc upper carriage 13 upper surface is the cambered surface, cambered surface and hose cover 9 fixed connection, and spring 14 is located the inboard of lower carriage 12, the one end and the arc upper carriage 13 fixed connection of spring 14, and the other end and the bottom of lower carriage 12 of spring 14 are connected.
The arc upper frame 13 is provided with a connecting hole, the arc upper frame 13 is provided with a connecting belt, and the connecting belt penetrates through the connecting hole and binds the hose sleeve 9 to connect the two ends of the conveying pipeline.
The water storage module further comprises a flow meter 15 and a water outlet, and the flow meter 15 is installed on the branch pipe 5 and is positioned behind the control piece along the water flow direction;
a water level sensor 16 is mounted on the water outlet, and the water level sensor 16 is suitable for measuring the height of the water level in the water-stop wall 2.
The level sensor 16 is higher than the level of the water outlet.
A second support frame 17 is mounted on the diaphragm wall 2, and the second support frame 17 is suitable for supporting the height of the shunt branch pipe 5 mounted on the diaphragm wall 2.
The conveying pipeline is distributed in the concrete in a snake shape, and the inflection point and the middle part of the conveying pipeline are both provided with embedded temperature sensors 8.
The control piece comprises a two-position three-way electromagnetic valve 18 and a one-way valve 6, the two-position three-way electromagnetic valve 18 is connected with the conveying pipeline and is connected with the water storage tank 3, the cooling tower 4 and the branch flow pipe 5, the first state of the two-position three-way electromagnetic valve 18 is communicated with the water storage tank 3 and the cooling tower 4, the flowing water cannot flow through the branch flow pipe 5, the second state of the two-position three-way electromagnetic valve 18 is communicated with the water storage tank 3 and the branch flow;
the one-way valve 6 limits the one-way passage of water out of the two-position three-way solenoid valve 18 to the flow meter 15.
The specific construction method comprises the following steps:
the method comprises the following steps: the pre-embedding of the transmission pipeline and the pre-embedding of the embedded temperature sensor 8 are finished
A1, paving a conveying pipeline in the precast foundation pit after the installation of the bottom plate steel bars is finished according to calculation, wherein the conveying pipeline is distributed in a snake shape, and when the supporting force at the high position is insufficient, a support is erected to support the conveying pipeline;
a2: installing and fixing embedded temperature sensors 8 with different depths according to the inflection point and the middle position calculated in the precast foundation pit;
a3: a fracture is formed in a convex part above a conveying pipeline in a precast foundation pit and is connected by a hose sleeve 9;
a4: one part of the conveying pipeline is respectively connected with a water outlet pipeline and a water storage tank 3 in the un-poured foundation pit, and one part of the conveying pipeline is respectively connected with the water storage tank 3, a control piece, the control piece, a cooling tower 4 and the cooling tower 4 to a pre-poured water inlet pipeline;
a5: the water inlet and the water outlet of the cooling tower 4 are provided with water temperature sensors 11, and the water temperature sensors 11 are connected with the cooling tower 4 and used for measuring the speed and the temperature of circulating water in and out of the cooling tower 4;
a6, connecting a control piece with the branch pipe 5, measuring the flow of the branch pipe 5 through a one-way valve 6 and a flowmeter 15, and installing a water level sensor 16;
a7: carrying out a ball passing experiment and an air tightness test, checking the integral fixation of the conveying pipeline, and mounting embedded steel bars;
step two: when concrete pouring construction is carried out
B1, pouring concrete into the pouring pit 1, wherein the pouring height of the concrete reaches the design height, and the height of the concrete is limited to 10 cm-20 cm below the convex part;
b2: injecting water into the water storage tank 3, starting a water pump in the cooling tower 4 and the water storage tank and starting water circulation work, monitoring the water temperature of an inlet and an outlet of the cooling tower 4 by a water temperature sensor 11, and setting and controlling the water temperature and the circulation rate of the inlet and the outlet by the cooling tower 4;
step three: concrete pouring is completed, and circulating water cooling and maintenance are carried out
C1, laying bricks on the surface of the concrete to build the water-stop wall 2 after the concrete in the casting pit 1 is static for 2 to 4 days;
c2, mounting a second support frame 17 on the water-stop wall 2, and mounting the branch pipe 5 on the second support frame 17;
c3, after the construction of the water-stop wall 2, breaking the designed fracture of the bulge, adopting a hose sleeve 9 connection part, installing a first support frame 10 below the hose sleeve 9, bonding an arc-shaped upper frame 13 with the hose sleeve 9, and connecting a lower frame 12 with a concrete surface bolt;
c4, opening the two-position three-way electromagnetic valve 18 to make the branch pipe 5 pass through the flowing water, the flowmeter 15 works and records the flow, the water outlet drains until reaching the installation height of the water level sensor 16, the feedback signal controls the two-position three-way electromagnetic valve 18 to turn to close the flow direction of the branch pipe 5, and the water in the water storage tank 3 flows to the cooling tower 4 in one way;
c3, monitoring the internal temperature of the concrete through the embedded temperature sensor 8, comparing the average value of all values with the temperature of the water outlet of the cooling tower 4, wherein the temperature difference between the inside and the outside is more than 5 ℃, manually setting the water temperature and the speed of the inlet and the outlet of the cooling tower 4, and controlling the internal cooling rate of the concrete;
c4, stopping the water storage tank 3 of the cooling tower 4 when the water temperature at the water inlet is basically stable and the temperature difference between the inside and the outside does not exceed 5 ℃;
and C5, removing residual water in the conveying pipeline, and plugging and grouting the conveying pipeline.
Setting a first cycle state: the first state of the two-position three-way electromagnetic valve 18 is communicated with the output ends of the branch pipe 5 and the water storage tank 3, the second state of the two-position three-way electromagnetic valve 18 is communicated with the water storage tank 3 and the cooling tower 4, the height of the water level sensor 16 is installed by designing the water storage height and flow of the water separation wall 2, when the water level sensor 16 senses the horizontal plane, a feedback signal is sent to the controller, the controller sends a signal to the two-position three-way electromagnetic valve 18, and the two-position three-way electromagnetic valve 18 realizes the adjustment.
The electrical connection between the water storage tank 3 and the cooling tower 4 is conventional and will not be described in detail.
Setting a second cycle state: the second circulation is water circulation, water flow is input into the cooling tower 4 by the output end of the water storage tank 3, the cooling tower 4 is cooled, cooling water is input into a conveying pipeline of the pouring pit, and the cooling water flows back to the water storage tank 3 through the interior of concrete.
Setting a third cycle state: inputting the water of storage water tank 3 to cooling tower 4, the cooling water of cooling tower 4 is input to the inside retaining of division wall, and the inside temperature of cooling water intensification temperature laminating concrete makes the temperature continuation of concrete reduce gradually, is in unchangeable state until the inside temperature of concrete, and the concrete is exothermic to be accomplished, accomplishes the cooling to the concrete and handles.
The integral circulation part is set to reduce the manual operation intensity, the first support frame 10 is set to be adhered with the hose sleeve 9, the connecting belt at two ends of the hose sleeve 9 is removed by utilizing the flexibility of the spring 14, the hose sleeve can be kept on the arc-shaped upper frame 13, cooling water enters the water flow of the separation wall after the hose sleeve 9 is removed, and in the concrete curing process, after the water seepage of the separation wall occurs, the generation of cracks is also shown according to the increase of the flow meter 15.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. The utility model provides a bulky concrete cooling water circulation, includes pouring hole (1) and the power behind the concreting, its characterized in that: the concrete pouring system is characterized by further comprising a water circulation module and a water storage module, wherein the water circulation module comprises a conveying pipeline, a water storage tank (3) and a cooling tower (4), the conveying pipeline is laid in the pouring pit (1), a water-stop wall (2) is arranged on the upper surface of the pouring pit (1), and the water-stop wall (2) is suitable for storing water and curing concrete;
the water storage tank (3) is provided with an output end and an input end, the output end conveys water into the cooling tower (4), the cooling tower (4) cools the water at the output end of the water storage tank (3) and outputs the cooled water into the conveying pipeline of the pouring pit (1), and the input end of the water storage tank (3) conveys the water which passes through the concrete in the pouring pit (1) back to the water storage tank (3);
the water storage module comprises a branch flow pipe (5) and a control element, wherein an introduction opening of the branch flow pipe (5) is positioned between the water storage tank (3) and the cooling tower (4), the branch flow pipe (5) is suitable for leading water into the water-stop wall (2), the control element is positioned at a port of the branch flow pipe (5) close to one end of the water storage tank (3), and the control element is suitable for controlling the flow direction of the water of the branch flow pipe (5);
pipeline's top is equipped with bellying (7), the top of bellying (7) is located pours hole (1) concrete on, the pipeline of bellying (7) is equipped with the fracture, bellying (7) are suitable for in the pipeline of water along the rivers direction transport entering concrete with diaphragm wall (2).
2. The cooling water circulation for mass concrete according to claim 1, wherein: water pumps are arranged inside the water storage tank (3) and the cooling tower (4), the conveying pipeline is connected with the water pumps, the water pumps are electrically connected with a power supply, an embedded temperature sensor (8) is arranged on the surface of the conveying pipeline inside the pouring pit (1), and the embedded temperature sensor (8) is suitable for measuring the surface temperature of the conveying pipeline;
a hose sleeve (9) is installed at the fracture of the protruding portion (7), the hose sleeve (9) is suitable for conveying cooling water along the water flow direction of the conveying pipeline, a first support frame (10) is installed at the lower end of the protruding portion (7), the first support frame (10) is located on the surface of concrete, and the first support frame (10) is suitable for supporting and installing the hose sleeve (9);
and water temperature sensors (11) are arranged at the water inlet and the water outlet of the cooling tower (4), and the water temperature sensors (11) are suitable for measuring the temperature of the water inlet and the water outlet of the cooling tower (4).
3. A mass concrete cooling water circuit according to claim 2, wherein: first support frame (10) are including undercarriage (12), arc upper ledge (13) and spring (14), undercarriage (12) are hollow structure, the bottom and the concrete surface of undercarriage (12) are connected, arc upper ledge (13) and undercarriage (12) sliding connection, arc upper ledge (13) are "Y" shape, arc upper ledge (13) upper surface is the cambered surface, cambered surface and hose cover (9) fixed connection, spring (14) are located the inboard of undercarriage (12), the one end and the arc upper ledge (13) fixed connection of spring (14), the other end and the bottom of undercarriage (12) of spring (14) are connected.
4. A mass concrete cooling water circuit according to claim 3, wherein: the connecting hole has been seted up on arc upper bracket (13), install the connecting band on arc upper bracket (13), the connecting band passes the connecting hole and binds hose cover (9) and connect pipeline's both ends.
5. The cooling water circulation for mass concrete according to claim 1, wherein: the water storage module further comprises a flow meter (15) and a water outlet, and the flow meter (15) is installed on the branch pipe (5) and is positioned behind the control piece along the water flow direction;
and a water level sensor (16) is installed on the water outlet, and the water level sensor (16) is suitable for measuring the height of the water level in the water-stop wall (2).
6. The cooling water circulation for mass concrete according to claim 5, wherein: the height of the water level sensor (16) is higher than that of the water outlet.
7. The cooling water circulation for mass concrete according to claim 1, wherein: install second support frame (17) on diaphragm wall (2), second support frame (17) are suitable for supporting the height that reposition of redundant personnel branch pipe (5) were installed on diaphragm wall (2).
8. The cooling water circulation for mass concrete according to claim 1, wherein: the conveying pipeline is distributed in the concrete in a snake shape, and embedded temperature sensors (8) are arranged at the inflection point and the middle part of the conveying pipeline.
9. The cooling water circulation for mass concrete according to claim 1, wherein: the control piece comprises a two-position three-way electromagnetic valve (18) and a one-way valve (6), the two-position three-way electromagnetic valve (18) is connected with the conveying pipeline and is connected with the water storage tank (3), the cooling tower (4) and the branch flow pipe (5), the water storage tank (3) and the cooling tower (4) are communicated in a first state of the two-position three-way electromagnetic valve (18), flowing water cannot flow through the branch flow pipe (5), the water storage tank (3) and the branch flow pipe (5) are communicated in a second state of the two-position three-way electromagnetic valve (18), and the cooling;
the one-way valve (6) limits the one-way passage of water from the two-position three-way electromagnetic valve (18) to the flowmeter (15).
10. A construction method of a large-volume concrete cooling water circulation device is characterized by comprising the following steps:
the method comprises the following steps: the pre-embedding of the transmission pipeline and the pre-embedding of the embedded temperature sensor (8) are finished
A1, paving a conveying pipeline in the precast foundation pit after the installation of the bottom plate steel bars is finished according to calculation, wherein the conveying pipeline is distributed in a snake shape, and when the supporting force at the high position is insufficient, a support is erected to support the conveying pipeline;
a2: installing and fixing embedded temperature sensors (8) with different depths according to the inflection point and the middle position calculated in the precast foundation pit;
a3: a fracture is formed in a convex part above a conveying pipeline in a precast foundation pit and is connected by a hose sleeve (9);
a4: one part of the conveying pipeline is respectively connected with a water outlet pipeline and a water storage tank (3) in the un-poured foundation pit, and one part of the conveying pipeline is respectively connected with the water storage tank (3), a control piece, the control piece, a cooling tower (4) and the cooling tower (4) to a pre-poured water inlet pipeline;
a5: the water inlet and the water outlet of the cooling tower (4) are provided with water temperature sensors (11), and the water temperature sensors (11) are connected with the cooling tower (4) and used for measuring the speed and the temperature of circulating water in and out of the cooling tower (4);
a6, connecting a control piece with the branch pipe (5), measuring the flow of the branch pipe (5) through a one-way valve (6) and a flow meter (15), and installing a water level sensor (16);
a7: carrying out a ball passing experiment and an air tightness test, checking the integral fixation of the conveying pipeline, and mounting embedded steel bars;
step two: when concrete pouring construction is carried out
B1, pouring concrete into the pouring pit (1), wherein the pouring height of the concrete reaches the design height, and the height of the concrete is limited to 10 cm-20 cm below the convex part;
b2: injecting water into the water storage tank (3), opening a water pump in the cooling tower (4) and the water storage tank and starting water circulation work, monitoring the water temperature of an inlet and an outlet of the cooling tower (4) by a water temperature sensor (11), and setting and controlling the water temperature and the circulation rate of the inlet and the outlet by the cooling tower (4);
step three: concrete pouring is completed, and circulating water cooling and maintenance are carried out
C1, laying bricks on the surface of the concrete to build the water-stop wall (2) after the concrete in the casting pit (1) is static for 2 to 4 days;
c2, mounting a second support frame (17) on the water-stop wall (2), and mounting the branch pipes (5) on the second support frame (17);
c3, after the construction of the water-stop wall (2), breaking the designed fracture of the bulge, installing a first support frame (10) below the hose sleeve (9) by adopting the connection part of the hose sleeve (9), bonding the arc-shaped upper frame (13) with the hose sleeve (9), and connecting the lower frame (12) with the concrete surface through bolts;
c4, opening the two-position three-way electromagnetic valve (18) to enable the branch flow pipe (5) to flow water, enabling the flow meter (15) to work and record the flow, draining water from the water outlet until the water level sensor (16) is installed, and feeding back a signal to control the two-position three-way electromagnetic valve (18) to turn to close the flow direction of the branch flow pipe (5) to enable the water in the water storage tank (3) to flow to the cooling tower (4) in a one-way mode;
c3, monitoring the internal temperature of the concrete through the embedded temperature sensor (8), comparing the average value of all values with the temperature of a water outlet of the cooling tower (4), wherein the temperature difference between the inside and the outside is more than 5 ℃, manually setting the water temperature and the water speed of an inlet and an outlet of the cooling tower (4), and controlling the internal cooling rate of the concrete;
c4, stopping the work of the water storage tank (3) of the cooling tower (4) when the water temperature at the water inlet is basically stable and the temperature difference between the inside and the outside does not exceed 5 ℃;
and C5, removing residual water in the conveying pipeline, and plugging and grouting the conveying pipeline.
CN202010843662.0A 2020-08-20 2020-08-20 Large-volume concrete cooling water circulation and construction method Active CN111980408B (en)

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CN112696037A (en) * 2020-12-23 2021-04-23 重庆建工第三建设有限责任公司 Large-volume concrete comprehensive maintenance system
CN113149709A (en) * 2021-03-25 2021-07-23 武昌理工学院 Temperature control method for controlling temperature difference of medium-heat lining concrete through water cooling
CN113211597A (en) * 2021-04-16 2021-08-06 交通运输部公路科学研究所 Infrared self-adaption device and method for cement concrete pavement facility

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