CN112267699A - Winter heat-preservation construction method for structural support - Google Patents
Winter heat-preservation construction method for structural support Download PDFInfo
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- CN112267699A CN112267699A CN202011252152.2A CN202011252152A CN112267699A CN 112267699 A CN112267699 A CN 112267699A CN 202011252152 A CN202011252152 A CN 202011252152A CN 112267699 A CN112267699 A CN 112267699A
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- heat preservation
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- grouting
- support rod
- temperature
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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
- E04G21/28—Safety or protective measures preventing damage to building parts or finishing work during construction against unfavourable weather influence
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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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
- E04H5/04—Transformer houses; Substations or switchgear houses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a winter heat preservation construction method for a structural support, and mainly relates to the field of construction heat preservation. Include the outside parcel waterproof heating area at first section cradling piece, and utilize fixing device to fix, just so can heat the operation to whole and inside grout material of first section cradling piece, and utilize outside heat preservation to keep warm, guarantee the temperature of the inside grout material of first section cradling piece, outside in first section cradling piece bottom sets up the heat preservation canopy, including containing the rim of a cup, utilize heating device to heat the heat preservation canopy, utilize the heat preservation to keep warm equally, guarantee the temperature of the intraoral grout material of cup, make it solidify the back smoothly and possess sufficient intensity. The invention has the beneficial effects that: it can carry out effectual heat preservation to the grout material in the work progress, guarantees that it solidifies smoothly, improves the structural strength and the life who constructs the support.
Description
Technical Field
The invention relates to the field of support heat preservation, in particular to a winter heat preservation construction method for a structural support.
Background
In the construction process of a transformer substation or a converter station, the outdoor temperature in winter is low, and a special construction stage in winter is adopted when the daily average temperature reaches minus five degrees for five consecutive days, which is a need of heat preservation in the construction process of a construction support of the transformer substation or the converter station to ensure normal solidification of grouting liquid and ensure the structural strength and the service life of the construction support.
Disclosure of Invention
The invention aims to provide a winter heat preservation construction method for a structural support, which can effectively preserve heat of grouting materials in the construction process, ensure the grouting materials to be solidified smoothly, improve the structural strength of the structural support and prolong the service life of the structural support.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a winter heat preservation construction method for a structural support comprises the following steps: 1) the first section of support rod of the structural support is of a hollow tubular structure, a cup opening is formed in the top of the framework foundation and extends downwards from the top of the framework foundation, after the framework foundation is grouted and manufactured, a waterproof heating belt is wrapped outside the first section of support rod, the waterproof heating belt is fixed through a fixing device, and then a heat insulation layer is wrapped outside the waterproof heating belt;
2) hoisting the first section of support rod by using a hoisting device, inserting the bottom of the first section of support rod into a cup opening of a framework foundation, correcting the position of the first section of support rod in the cup opening, and then inserting a wedge block between the first section of support rod and the side wall of the cup opening for preliminary fixing;
3) performing secondary grouting operation from the top into the first section of the support rod to fill grout into the first section of the support rod, performing secondary grouting into the cup opening to fill grout between the inner wall of the cup opening and the outer wall of the first section of the support rod, and starting a waterproof heating belt to perform heat preservation operation on the grout inside the first section of the support rod in the grouting process;
4) in the solidification process of grouting liquid in the cup opening, arranging a heat preservation shed at the bottom of the first section of support rod, enabling the cup opening to be included in the range of the heat preservation shed, arranging a heating device in the heat preservation shed, wrapping the heat preservation layer on the outer wall of the heat preservation shed, and performing heat preservation operation on the grouting liquid in the cup opening;
5) the temperature in the heat preservation shed is regularly measured in the heat preservation process, and the heating power of the heating device is improved when the temperature is too low, so that the grouting liquid is guaranteed to be smoothly solidified.
Further, the grouting liquid uses fine aggregate concrete or cement mortar, the water temperature of water is kept between 60 and 80 ℃ during the mixing preparation of the grouting liquid, and an antifreezing agent is added during the preparation process.
Furthermore, grouting operation needs to be continuously carried out, interruption cannot be caused, grouting needs to be completed at one time, the temperature in the heat preservation process after grouting cannot be lower than 5 ℃, and the heat preservation and maintenance time after grouting is not less than one week.
Further, waterproof heating area and heating device are the heating methods of electrical heating, waterproof heating area is the companion tropical, heating device is the electric heater.
Further, fixing device is the plastic cloth, the material of heat preservation is cotton or felt cloth.
Further, every construct the support and all include many first section cradling pieces, the bottom of every first section cradling piece all sets up the thermal-insulation shed, and the electric heater in a plurality of thermal-insulation sheds all is connected with same power supply box.
Furthermore, in the temperature measurement process, the temperature measurement holes are arranged at representative structural parts and parts which are large in temperature change and easy to cool, the hole depth is 10-15 cm, and during temperature measurement, the temperature measurement instrument is isolated from the outside air temperature and is kept in the temperature measurement holes for not less than 3 min.
Compared with the prior art, the invention has the beneficial effects that:
in the secondary grouting process of construction, the first section of support rod is hoisted by utilizing the hoisting device, so that the bottom of the first section of support rod is inserted into the cup mouth of the framework foundation, secondary grouting is performed from the top into the first section of support rod after the position of the first section of support rod is corrected, and secondary grouting is performed into the cup mouth at the same time, so that the fixing effect of the framework foundation and the first section of support rod is ensured, and the sufficient bearing capacity and the sufficient stability are ensured; before the hollow first section support rod of the support is grouted, a waterproof heating belt is wrapped outside the first section support rod and is fixed by a fixing device, so that the whole and the inside grouting material of the first section support rod can be heated after secondary grouting, and the heat preservation is carried out by an external heat preservation layer, so that the temperature of the grouting material inside the first section support rod is ensured, the grouting material is enabled to have enough structural strength after being solidified smoothly, the safety risk is reduced, and the structure is simple, easy to operate and suitable for large-scale construction operation; set up the thermal-insulation shed in the outside of first section cradling piece bottom, including containing the rim of a cup, utilize heating device to heat the thermal-insulation shed, utilize the heat preservation to keep warm equally, guarantee the temperature of the intraoral grout material of cup, make it possess sufficient intensity after solidifying smoothly, can also adjust the intensity of heating according to inside and outside difference in temperature, better heat preservation effect has been guaranteed, make and construct grouting position after the support construction is accomplished and possess sufficient support strength, hidden safety risk has been reduced, the quality of construction has been guaranteed.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
The invention relates to a winter heat preservation construction method for a structural support, which comprises the following steps: 1) the first section of support rod of the structural support is of a hollow tubular structure, a cup mouth is formed in the top of the structural support, the cup mouth extends downwards from the top of the structural support, after grouting of the structural support is completed, a waterproof heating belt wraps the first section of support rod, the waterproof heating belt is of a soft belt-shaped structure with a heating function, the side face of the first section of support rod is wrapped by winding, the waterproof heating belt also has certain waterproof capacity so as to prevent grouting liquid from affecting the heating capacity of the waterproof heating belt, the waterproof heating belt is fixed on the side face of the first section of support rod by using a fixing device, heating operation is stable, the heating effect is ensured, then a heat insulation layer wraps the waterproof heating belt, heat generated by heating of the waterproof heating belt is kept in the first section of support rod, and the heat insulation effect after heating is improved;
2) the first section of support rod is hoisted by utilizing a hoisting device, the hoisting device can specifically select a truck crane with stronger weighing capacity such as 500t as a main crane to ensure the hoisting capacity of the truck crane, the first section of support rod is hoisted to ensure that the bottom of the truck crane is inserted into a cup opening of a framework foundation for installation, each framework support comprises a plurality of support legs, the bottom of each support leg consists of a plurality of first section of support rods, the cup opening is arranged at the top of the framework foundation, the position of the first section of support rod in the cup opening is corrected, then a wedge block is inserted between the first section of support rod and the side wall of the cup opening for preliminary fixation, so that the first section of support rod at the bottom of the framework support can be ensured to be positioned at a proper position in the cup opening, and the integral stability of;
3) carrying out secondary grouting operation from the top into the first section of support rod, wherein the first section of support rod of the support is a hollow tubular structure, the bearing capacity and the strength of the first section of support rod are improved by grouting into the hollow tubular structure, a framework foundation is installed and fixed in a foundation pit below the ground through grouting, after the construction of the framework foundation is finished, carrying out secondary grouting operation from the top into the first section of support rod, so that grout is filled in the first section of support rod, and meanwhile, carrying out secondary grouting into a cup mouth, so that grout is filled between the inner wall of the cup mouth and the outer wall of the first section of support rod, and starting a waterproof heating belt to carry out heat preservation operation on the grout in the first section of support rod in the grouting process; the grouting liquid is easy to freeze in a low-temperature environment below zero due to the moisture, so that the smooth solidification of the grouting liquid is influenced, the strength of the grouting liquid after solidification is reduced, the grouting liquid is easy to crack, and the construction quality is influenced;
4) in the solidification process of grouting liquid in a cup opening, a heat preservation shed is arranged at the bottom of a first section of support rod and can be made of a metal plate, or a support is formed by utilizing the metal rod to form the support, the metal plate is wrapped on the support, the cup opening is included in the range of the heat preservation shed, the heat preservation shed can be arranged according to the size of a framework foundation, the size of the framework foundation can meet the requirement generally being 2mX2mX2m, a heating device is arranged in the heat preservation shed and can be used in an electric heating mode or a fuel heating mode, a heat preservation layer is also wrapped on the outer wall of the heat preservation shed, heat preservation operation is carried out on the grouting liquid in the cup opening, the temperature in the whole heat preservation shed is kept at zero, smooth solidification of the grouting liquid is ensured, all grouting liquid in the cup opening can be included through the arrangement, and the heating and heat preservation effects are good;
5) temperature in the heat preservation in-process periodic measurement heat-preservation shed, improve heating device's heating power when the temperature is low excessively, guarantee that the grout liquid solidifies smoothly, utilize waterproof heating area and heating device to adjust the power of heating to play the heating effect under the different temperature differences, be applicable to the construction of multiple environment and use.
Preferably, the grouting liquid uses fine stone concrete or cement mortar, the label of the grouting liquid is higher than that of basic concrete by one grade, C45 is adopted to compensate and shrink the fine stone concrete, the water temperature of added water is kept between 60-80 ℃ when the grouting liquid is prepared by mixing, an antifreezing agent is added in the preparation process, the construction cement in the winter period of the concrete adopts ordinary portland cement, the cement must be put into a tank and is prevented from being affected with damp, thick and thin aggregates adopted by the mixed concrete are clean and do not contain ice, snow frozen blocks, organic matters and other easily-frozen and cracked mineral substances, active aggregates or materials mixed with the active aggregates or the substances in the aggregates are not adopted in the antifreezing agent concrete mixed with potassium and sodium ions, the antifreezing agent selects concrete early-strength antifreezing agents with stable performance and good quality by professional manufacturers, each experimental index meets the requirements of national relevant standards, and the experimental reports from test laboratories and the product certificates produced by the manufacturers are qualified, the anti-freezing effect is ensured.
Preferably, the grouting operation is carried out continuously, can not be interrupted, and needs to be finished by one-time grouting, so that the integral firmness degree of grouting is ensured, the temperature in the heat preservation process after grouting can not be lower than 5 ℃, the heat preservation and maintenance time after grouting is not less than one week, the brittleness of concrete can be greatly improved when the time is too short or the temperature is close to zero, and then cracking is easily caused after stress, and the integral structural strength is influenced.
Preferably, waterproof heating area and heating device are the heating methods of electrical heating, and the mode of electrical heating acquires relatively easily, and its heating power control is got up comparatively conveniently, waterproof heating area is the companion tropical, and its inside is the heating wire, and the outside is wrapped up by the rubber skin, guarantees sufficient waterproof ability, and is not fragile, can guarantee the heating effect, and low price, can used repeatedly, heating device is the electric heater, and the occupation of land scope of powerful electric heater is little, easily acquires, is equipped with 2.2 kW's high-power electric heater in every thermal-insulation shed, and its heating effect just can be fine satisfied demand and do not occupy more space.
Preferably, fixing device is the plastic cloth, and the low price of plastic cloth acquires easily, and itself still possesses certain waterproof ability, and the waterproof heating area of protection that can be further in electric heating's mode avoids leading to the fact the short circuit after intaking to influence the heating effect, the material of heat preservation is cotton or felt cloth, such material keeps warm effectually, and can carry out fine laminating with the outward appearance of the device that will keep warm, reduces space between the two, further reduces the heat loss.
Preferably, every construct the support and all include many first section cradling pieces, the bottom of every first section cradling piece all sets up the thermal-insulation shed, and the electric heater in a plurality of thermal-insulation sheds all is connected with same power supply box, can utilize same power to heat many first section cradling pieces under every structure support simultaneously like this, makes the construction progress of its each position keep unanimous, and then makes the intensity after the grout material solidifies keep the uniformity, makes the structural strength who constructs the support bottom distribute more evenly, guarantees the firm and stable of structure.
Preferably, in the temperature measurement process, the temperature measurement hole is arranged at a representative structural part and a part which is large in temperature change and easy to cool, the hole depth is 10-15 cm, during temperature measurement, a temperature measurement instrument is isolated from the outside air temperature and is kept in the temperature measurement hole for at least 3min, so that the temperature measurement accuracy is further improved, and due to the fact that the inside and outside temperature difference is large, heating operation for a long time is needed once every difference is formed, therefore, more accurate control of the temperature of the grouting material is facilitated to better control the strength of the solidified grouting material, and the construction progress is guaranteed.
The working principle is as follows: in the secondary grouting process of construction, the first section of support rod is hoisted by utilizing the hoisting device, so that the bottom of the first section of support rod is inserted into the cup mouth of the framework foundation, secondary grouting is performed from the top into the first section of support rod after the position of the first section of support rod is corrected, and secondary grouting is performed into the cup mouth at the same time, so that the fixing effect of the framework foundation and the first section of support rod is ensured, and the sufficient bearing capacity and the sufficient stability are ensured; before the hollow first section support rod of the support is grouted, a waterproof heating belt is wrapped outside the first section support rod and is fixed by a fixing device, so that the whole and the inside grouting material of the first section support rod can be heated after secondary grouting, and the heat preservation is carried out by an external heat preservation layer, so that the temperature of the grouting material inside the first section support rod is ensured, the grouting material is enabled to have enough structural strength after being solidified smoothly, the safety risk is reduced, and the structure is simple, easy to operate and suitable for large-scale construction operation; set up the thermal-insulation shed in the outside of first section cradling piece bottom, including containing the rim of a cup, utilize heating device to heat the thermal-insulation shed, utilize the heat preservation to keep warm equally, guarantee the temperature of the intraoral grout material of cup, make it possess sufficient intensity after solidifying smoothly, can also adjust the intensity of heating according to inside and outside difference in temperature, better heat preservation effect has been guaranteed, make and construct grouting position after the support construction is accomplished and possess sufficient support strength, hidden safety risk has been reduced, the quality of construction has been guaranteed.
Claims (7)
1. A winter heat preservation construction method for a structural support is characterized by comprising the following steps: 1) the first section of support rod of the structural support is of a hollow tubular structure, a cup opening is formed in the top of the framework foundation and extends downwards from the top of the framework foundation, after the framework foundation is grouted and manufactured, a waterproof heating belt is wrapped outside the first section of support rod, the waterproof heating belt is fixed through a fixing device, and then a heat insulation layer is wrapped outside the waterproof heating belt;
2) hoisting the first section of support rod by using a hoisting device, inserting the bottom of the first section of support rod into a cup opening of a framework foundation, correcting the position of the first section of support rod in the cup opening, and then inserting a wedge block between the first section of support rod and the side wall of the cup opening for preliminary fixing;
3) performing secondary grouting operation from the top into the first section of the support rod to fill grout into the first section of the support rod, performing secondary grouting into the cup opening to fill grout between the inner wall of the cup opening and the outer wall of the first section of the support rod, and starting a waterproof heating belt to perform heat preservation operation on the grout inside the first section of the support rod in the grouting process;
4) in the solidification process of grouting liquid in the cup opening, arranging a heat preservation shed at the bottom of the first section of support rod, enabling the cup opening to be included in the range of the heat preservation shed, arranging a heating device in the heat preservation shed, wrapping the heat preservation layer on the outer wall of the heat preservation shed, and performing heat preservation operation on the grouting liquid in the cup opening;
5) the temperature in the heat preservation shed is regularly measured in the heat preservation process, and the heating power of the heating device is improved when the temperature is too low, so that the grouting liquid is guaranteed to be smoothly solidified.
2. The winter heat preservation construction method for the structural support according to claim 1, characterized in that: the grouting liquid is fine aggregate concrete or cement mortar, the water temperature of water is kept between 60 and 80 ℃ during the mixing preparation of the grouting liquid, and an antifreezing agent is added during the preparation process.
3. The winter heat preservation construction method for the structural support according to claim 1, characterized in that: the grouting operation needs to be continuously carried out, can not be interrupted, and needs to be finished by one-time grouting, the temperature in the heat preservation process after grouting can not be lower than 5 ℃, and the heat preservation and maintenance time after grouting is not less than one week.
4. The winter heat preservation construction method for the structural support according to claim 1, characterized in that: the waterproof heating belt and the heating device are both electrically heated, the waterproof heating belt is a heat tracing belt, and the heating device is an electric heater.
5. The winter heat preservation construction method for the structural support according to claim 4, characterized in that: the fixing device is plastic cloth, and the material of heat preservation is cotton or felt cloth.
6. The winter heat preservation construction method for the structural support according to claim 4, characterized in that: every construct the support and all include many first section cradling pieces, the bottom of every first section cradling piece all sets up the thermal-insulation shed, and the electric heater in a plurality of thermal-insulation sheds all is connected with same power supply box.
7. The winter heat preservation construction method for the structural support according to claim 1, characterized in that: in the temperature measurement process, the temperature measurement holes are arranged on representative structural parts and parts which are large in temperature change and easy to cool, the hole depth is 10-15 cm, and during temperature measurement, a temperature measurement instrument is isolated from the outside air temperature and is kept in the temperature measurement holes for not less than 3 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011252152.2A CN112267699B (en) | 2020-11-11 | 2020-11-11 | Winter heat-preservation construction method for structural support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011252152.2A CN112267699B (en) | 2020-11-11 | 2020-11-11 | Winter heat-preservation construction method for structural support |
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| CN112267699A true CN112267699A (en) | 2021-01-26 |
| CN112267699B CN112267699B (en) | 2022-05-27 |
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Citations (3)
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| CN202391147U (en) * | 2011-11-24 | 2012-08-22 | 天津二十冶建设有限公司 | Greenhouse for concrete construction in winter |
| CN206971258U (en) * | 2017-07-14 | 2018-02-06 | 安徽华电工程咨询设计有限公司 | A kind of high rim of a cup concrete foundation |
| CN207159822U (en) * | 2017-07-07 | 2018-03-30 | 辽宁铁道职业技术学院 | A kind of bridge pier mass concrete temperature regulating device |
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2020
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| CN202391147U (en) * | 2011-11-24 | 2012-08-22 | 天津二十冶建设有限公司 | Greenhouse for concrete construction in winter |
| CN207159822U (en) * | 2017-07-07 | 2018-03-30 | 辽宁铁道职业技术学院 | A kind of bridge pier mass concrete temperature regulating device |
| CN206971258U (en) * | 2017-07-14 | 2018-02-06 | 安徽华电工程咨询设计有限公司 | A kind of high rim of a cup concrete foundation |
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