Concrete structure slip form construction system under high-temperature and sunny side large-temperature difference environmentTechnical Field
The invention relates to a concrete structure sliding formwork construction system, in particular to a concrete structure sliding formwork construction system under high-temperature and sunny and rainy-side large-temperature-difference environments, and belongs to the technical field of building construction methods.
Background
In the construction process of concrete structures, slip-form construction is the most commonly used method.
The slip form construction has the advantages of high mechanization degree, high construction speed, small site occupation, safe operation guarantee, strong integrity of the built engineering structure, good earthquake resistance, environmental friendliness, obvious economic and social comprehensive benefits and the like, so that the slip form construction of the concrete structure body is rapidly developed and widely applied.
The slip form construction system of the concrete structure generally comprises a lifting system, a mould system, an operation platform system, an auxiliary facility system and the like.
Correspondingly, the slip form construction of the concrete structure generally comprises the procedures of binding reinforcing steel bars in the concrete structure, fixing and positioning a slip form construction enclosure and a lifting frame, manufacturing and positioning inner and outer formworks of the concrete structure, installing and positioning an inner and outer operation platform in slip form construction, installing and positioning a lifting and control device of the inner and outer formworks of the concrete structure, concreting the concrete structure, lifting the inner and outer formworks of the concrete structure and the like.
The slip form construction of the concrete structure has unique advantages, but because the concrete structure adopting the slip form construction is often large in volume, the concrete itself can generate heat and expand in the curing and reinforcing process, and the concrete structure can be influenced by environment, for example, when the slip form construction of the concrete structure is carried out in hot seasons or hot regions, particularly in desert regions with high Wen Shaoyu and strong illumination, the common slip form construction method can be severely tested, in those regions, the summer air temperature is up to more than 50 ℃, the day-night temperature difference and the sunny surface temperature difference can be up to tens of degrees, and the slip form construction is carried out at the environment temperature, so that quality accidents such as concrete cracking and the like are extremely easy to be caused by high temperature and temperature difference.
In addition, when the slip form construction of the concrete structure body is carried out in a desert area with strong illumination, the strength of concrete on the positive surface can be increased too fast due to the huge temperature difference between the positive surface and the negative surface irradiated by the sun, and the strength of the concrete on the negative surface can be increased slowly, so that the concrete strength collapses or cracks in the concrete lifting process due to the asynchronous increase, and the slip form construction can not be carried out in severe cases.
In the prior art, some special and valuable methods exist for slip-form construction in environments with high temperature and large temperature difference, such as:
The invention discloses a slip form temperature control method of a concrete silo under a high temperature environment (application number: CN 201010279909.7), which comprises the steps of a, designing a concrete mixing proportion, setting concrete slump, b, selecting concrete raw materials, c, reducing the temperature in mixing and transportation of the concrete, d, controlling the concrete supply rhythm, setting concrete which is definitely in place according to the requirement of one-time slip of the concrete, and the like;
the invention discloses a slip form construction method in an environment with high temperature and large temperature difference, which is disclosed in the patent (application number: CN 201210539585.5), and comprises the steps of preparing concrete in sections according to air temperature, adjusting the dosage of an additive and the quantity of ice cubes in sections;
the invention discloses a construction method of a slip form under a high-temperature environment, which is disclosed in the patent application (application number: CN 201210119464.5), and comprises the steps of selecting a proper additive, segmenting the temperature of each day in time according to the characteristic of large day-night temperature difference, setting a concrete mixing ratio in segments, adding ice cubes when the concrete is stirred, stirring the concrete tank truck, reducing the temperature of the concrete entering the mold, adopting an intermittent lifting process when the slip form is used, covering a cotton felt on the surface of the poured concrete, and adopting an annular spraying maintenance measure;
The invention discloses a cooling method for a silo slip form template under a high-temperature environment (application number: CN 201810441300.1), which comprises the steps of a, setting a slip form platform ice water system, b, setting a template heat preservation layer, wherein when the template cooling system works, ice water is sprayed on the template by an inner hanging bracket and an outer hanging bracket of the slip form to cool the template, white water-absorbing cotton cloth wrapped by a steel template absorbs water, so that the whole steel template is cooled, concrete in the template is cooled, the concrete temperature in the template is effectively prevented from increasing too fast under the high-temperature condition, the concrete surface temperature is effectively reduced, the concrete quality of silo slip form construction under extreme high-temperature weather is ensured, the influence of extreme high-temperature weather is reduced, and the continuity of silo slip form pouring is ensured;
the invention discloses a cylinder wall slide lifting template cooling device and a cylinder wall slide lifting template cooling and moisturizing system (application number CN201810502152. X), wherein the cooling device comprises a water storage device, an ice water storage device and a spraying device, water in the water storage device is conveyed to the ice water storage device, then the water in the ice water storage tank is sprayed to a slide lifting template through the spraying device to play a role in cooling the slide lifting template, the cooling and moisturizing system comprises a slide lifting template system, a heat insulation and moisturizing system and a cylinder wall slide lifting template cooling device, the temperature difference between the template surface and the interior of concrete is well reduced through ice water spraying cooling, so that the temperature of the interior of the concrete is kept consistent with the surface temperature, the internal and external solidification time of the concrete is kept consistent, and the key effects of accurately grasping the lifting time of the template and controlling cracking caused by the non-uniform internal and external solidification time of the concrete are achieved.
However, although the above prior art provides some special methods for slip-form construction in environments with high temperature and large temperature difference, and achieves better effects, no clear solution or direct method suggestion is provided for how to overcome the problem of concrete collapse or cracking in the process of lifting concrete caused by the fact that the strength of the yin and yang sides of the concrete structure is increased asynchronously due to severe temperature difference of the yin and yang sides of the concrete structure caused by strong sunlight.
Disclosure of Invention
In order to solve the defects in the prior art, the embodiment of the invention provides a concrete structure sliding formwork construction system under the environments of high temperature and large temperature difference of sunny and rainy sides, which aims at:
when the slip form construction of the concrete structure body is carried out under the high-temperature and sunny side large-temperature-difference environment, the quality accidents caused by the cracking of the concrete caused by the high temperature are avoided, meanwhile, the problem that the collapse or cracking is caused by the asynchronous increase of the concrete strength of the sunny side and the sunny side of the concrete structure body caused by strong sunlight is avoided, the normal slip form construction under the high-temperature and sunny side large-temperature-difference environment is realized, and the construction period and the quality of the concrete structure body are ensured.
In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:
The utility model provides a concrete structure body slipform construction system under high temperature and big difference in temperature environment of sunny and sunny side, includes lift system, mould system, operation platform system and auxiliary facilities system, wherein:
The formwork in the mould system is arranged on two sides of the built-in steel bars of the concrete structure body, the lifting system comprises a lifting open frame, the lifting open frame is arranged on the formwork for sliding lifting of the formwork, the operation platform system is arranged on the lifting open frame for controlling operation of the concrete structure body slip form construction system and maintenance and post-treatment of the concrete structure body, and the concrete structure body slip form construction system is characterized in that:
the operation platform system comprises an upper layer platform, a middle layer platform and a lower layer platform, wherein the operation platform is provided with a support sun-shading cooling heat-insulating system;
the upper layer platform is arranged at the top of the lifting letter opening frame, the table top of the upper layer platform is higher than the top of the template, the middle layer platform is arranged below the upper layer platform, and the lower layer platform is suspended below the middle layer platform;
The enclosure sunshade cooling heat insulation system comprises an upper fence, a lower fence, a dense mesh net, an ice water tank, a spray pipe and heat insulation geotextile;
The upper fence comprises an upper vertical rod and an upper cross rod, the upper vertical rod is erected on the outer sides of the upper layer platform and the middle layer platform, and the upper cross rod is connected between the upper vertical rods;
The lower fence comprises lower vertical rods and lower cross rods, the lower vertical rods are erected on two sides of the lower layer platform, which are parallel to the concrete structure body, and the lower cross rods are connected between the lower vertical rods;
The dense mesh net is arranged on the upper fence and the lower fence, the ice water box is arranged on the upper platform, the spray pipe is arranged on the lifting open-word frame, one end of the spray pipe is communicated with the ice water box, and the spray end of the spray pipe is arranged at the top of the template;
The heat-insulating geotechnical cloth covers the outer side of the template, a temperature sensing device is arranged on the heat-insulating geotechnical cloth, when the temperature sensed by the temperature sensing device exceeds the specified temperature, a valve of the ice water tank is opened to release ice water and the ice water is poured onto the heat-insulating geotechnical cloth through the spray pipe until the temperature on the heat-insulating geotechnical cloth reaches the specified requirement.
Further, the heat-insulating geotextile is cut according to the size of the rib separation area on the back of the template, and then the cut four layers of heat-insulating geotextile are overlapped and placed in the rib separation area on the back of the template and fixed by wood strips.
Furthermore, the outer surface of the ice water tank is wrapped by mineral wool for heat insulation, and the mineral wool is fixedly shielded by the wood template for external use.
Further, the prescribed temperature is 25 ℃.
Compared with the prior art, the embodiment of the invention has the beneficial effects and remarkable progress that:
1) The concrete structure sliding formwork construction system comprises a lifting system, a mould system, an operation platform system and an auxiliary facility system, wherein the operation platform of the operation platform system comprises an upper-layer platform, a middle-layer platform and a lower-layer platform, a protection sunshade cooling heat insulation system is arranged on the operation platform, the protection sunshade cooling heat insulation system comprises an upper rail, a lower rail, a dense mesh net, an ice water tank, a spray pipe and heat insulation geotextile, the dense mesh net is arranged on the upper rail and the lower rail, the ice water tank is arranged on the upper-layer platform, the spray pipe is arranged on a lifting word frame, one end of the spray pipe is communicated with the ice water tank, a spray end of the spray pipe is arranged on the top of a mould plate, the heat insulation geotextile covers the outer side of the mould plate, and a temperature sensing device is arranged on the heat insulation geotextile;
2) According to the concrete structure slip form construction system under the high-temperature and sunny side large-temperature-difference environment, the operation platforms in the operation platform system are arranged to be the upper-layer platform, the middle-layer platform and the lower-layer platform, so that the operation platforms are subjected to functional partitioning, people flow and logistics are orderly inserted, the orderly construction is ensured, meanwhile, the dense mesh net is arranged on the fences of the platforms, so that the direct sunlight of the sun to the templates and newly poured concrete is effectively shielded, the problem of collapse or cracking caused by the asynchronous increase of the concrete strength of the sunny side and the sunny side of the concrete structure is avoided, the normal slip form construction under the high-temperature and sunny side large-temperature-difference climate environment is realized, and the difficulty in slip form construction is effectively solved;
3) The concrete structure sliding formwork construction system under the high-temperature and sunny side large-temperature difference environment overcomes the defect that the sliding formwork construction is difficult due to the high-temperature and sunny side large-temperature difference environment, is novel and unique in thought, convenient and simple in measure use, low in cost, excellent in effect, strong in practicability, good in operability and expansibility, provides a borrowable example and an operable hint for sliding formwork construction under the high-temperature and strong-illumination environment, and provides another method with opening property for sliding formwork construction, so that the concrete structure sliding formwork construction system has popularization and application values.
Drawings
In order to more clearly illustrate the technical solution of the present invention, a brief description will be given below of the drawings that are required to be used for the embodiments of the present invention.
It is obvious that the drawings in the following description are only drawings of some embodiments of the present invention, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art, but these other drawings also fall within the drawings required for the embodiments of the present invention.
FIG. 1 is a working schematic diagram of a slip form construction system of a concrete structure in a high-temperature and sunny-negative surface large-temperature-difference environment provided by an embodiment of the invention;
fig. 2 is a schematic diagram of a local structure of a slip form construction system of a concrete structure in a high-temperature and sunny-negative surface large-temperature-difference environment according to an embodiment of the invention.
In the figure:
110-concrete structure foundation, 120-concrete structure;
200-a slip form construction system of a concrete structure body;
210-templates, 220-lifting the letter opening frame;
231-upper platform, 232-middle platform, 233-lower platform;
241-upper rail, 2411-upper upright rod, 2412-upper cross rod, 242-lower rail, 2421-lower upright rod, 2422-lower cross rod, 243-dense mesh net, 244-ice water tank, 245-spray pipe, 246-heat insulation geotextile.
Detailed Description
In order to make the objects, technical solutions, advantageous effects and significant improvements of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings provided in the embodiments of the present invention, and it is apparent that all of the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments of the present invention are within the scope of protection of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings of the embodiments of the present invention are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise," "include," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
It is to be understood that in the description of embodiments of the invention, the use of directional orientation or positional terms are merely exemplary of the orientations or positional relationships illustrated in the drawings based on embodiments of the invention, and are not meant to facilitate the description of embodiments of the invention or to simplify the description, but rather to indicate or imply that the apparatus or elements described must have a particular orientation, particular orientation configuration, or operation, and are not to be construed as limiting.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected or movably connected, or integrally formed, directly connected, indirectly connected or intangible signal connected through an intermediary, or even optically connected, in communication with each other, or in an interaction relationship between two elements, unless otherwise explicitly specified.
The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should also be noted that the following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
The following describes the technical scheme of the present invention in detail by using specific examples.
Examples
As shown in a working schematic diagram of a concrete structure sliding mode construction system under a high-temperature and sunny side large-temperature difference environment provided by the embodiment of the invention in fig. 1, and a partial structure schematic diagram of a concrete structure sliding mode construction system under a high-temperature and sunny side large-temperature difference environment provided by the embodiment of the invention in fig. 2, the partial structure schematic diagram is shown as follows:
The concrete structure sliding formwork construction system 200 under the conditions of high temperature and large temperature difference of sunny and sunny sides comprises a lifting system, a mould system, an operation platform system and an auxiliary facility system, wherein:
The templates 210 in the mould system are arranged on two sides of the built-in reinforcing steel bars of the concrete structure body 120, the lifting system comprises a lifting open frame 220, the lifting open frame 220 is arranged on the templates 210 for sliding lifting of the templates 210, and the operation platform system is arranged on the lifting open frame 220 for controlling the operation of the concrete structure body sliding mould construction system 200 and the maintenance and post-treatment of the concrete structure body 120;
the operation platform system comprises an upper layer platform 231, a middle layer platform 232 and a lower layer platform 233, and a support sun-shading, cooling and heat-insulating system is arranged on the operation platform;
The upper layer platform 231 is arranged at the top of the lifting letter box 220, the table top of the upper layer platform 231 is higher than the top of the template 210, the middle layer platform 232 is arranged below the upper layer platform 231, and the lower layer platform 233 is suspended below the middle layer platform 231;
the enclosure sunshade cooling heat insulation system comprises an upper fence 241, a lower fence 242, a dense mesh net 243, an ice water tank 244, a spray pipe 245 and heat insulation geotextile 246;
the upper rail 241 includes an upper upright pole 2411 and an upper cross bar 2412, the upper upright pole 2411 is erected outside the upper platform 231 and the middle platform 232, and the upper cross bar 2412 is connected between the upper upright poles 2411;
The lower rail 242 includes lower uprights 2421 and lower rails 2422, the lower uprights 2421 are erected on two sides of the lower platform 233 parallel to the concrete structure 120, and the lower rails 2422 are connected between the lower uprights 2421;
the dense mesh net 243 is arranged on the upper rail 241 and the lower rail 242, the ice water box 244 is arranged on the upper platform 231, the spray pipe 245 is arranged on the lifting open frame 220, one end of the spray pipe 245 is communicated with the ice water box 244, and the spray end of the spray pipe 245 is arranged on the top of the template 210;
The heat-insulating geotextile 246 covers the outside of the template 210, and a temperature sensing device (not shown) is arranged on the heat-insulating geotextile 246, when the temperature sensed by the temperature sensing device (not shown) exceeds a specified temperature, a valve of the ice water tank 244 is opened to discharge ice water and the ice water is poured on the heat-insulating geotextile 246 through the spray pipe 245 until the temperature on the heat-insulating geotextile 246 reaches the specified requirement.
Further, in this embodiment, the heat-insulating geotextile 246 is cut according to the size of the rib separation area on the back side of the template 210, and then four layers of the cut heat-insulating geotextile 246 are overlapped and placed in the rib separation area on the back side of the template 210 and fixed by using battens.
Further, in this embodiment, the outer surface of the ice water tank 244 is covered with mineral wool for heat insulation, and is covered with a molded board for external use of mineral wool.
Further, in this example, the predetermined temperature was 25 ℃.
From the above description, it can be seen that:
The concrete structure slip form construction system comprises a lifting system, a mould system, an operation platform system and an auxiliary facility system, wherein the operation platform of the operation platform system comprises an upper layer platform, a middle layer platform and a lower layer platform, a support sun-shading cooling heat insulation system is arranged on the operation platform, the support sun-shading cooling heat insulation system comprises an upper rail, a lower rail, a dense mesh net, an ice water tank, a spray pipe and heat insulation geotextile, the dense mesh net is arranged on the upper rail and the lower rail, the ice water tank is arranged on the upper layer platform, the spray pipe is arranged on a lifting word frame, one end of the spray pipe is communicated with the ice water tank, a spray end of the spray pipe is arranged on the top of a mould plate, the heat insulation geotextile covers the outer side of the mould plate, and a temperature sensing device is arranged on the heat insulation geotextile, when the temperature sensed by the temperature sensing device exceeds a specified temperature, the valve of the ice water tank is opened and poured onto the heat insulation geotextile until the temperature on the heat insulation geotextile meets the specified requirements, so that the slip form is carried out under the high temperature and the negative temperature difference environment, the slip form is prevented from causing severe quality crack of the concrete structure under the high temperature and the high temperature environment or the high temperature environment, the concrete structure is prevented from causing severe construction quality crack or the concrete structure to be caused by the high temperature accident and the severe quality of the slip form or the severe construction conditions;
Secondly, in the concrete structure slip form construction system under the high-temperature and sunny side large-temperature-difference environment, the operation platforms in the operation platform system are arranged to be an upper-layer platform, a middle-layer platform and a lower-layer platform, so that the functions of each-layer platform are partitioned, people flow and logistics are orderly alternated, and the orderly construction is ensured, meanwhile, the dense mesh net is arranged on the fences of each-layer platform, so that the direct sunlight of the sun on the templates and newly poured concrete is effectively shielded, the problem of collapse or cracking caused by the asynchronous increase of the concrete strength of the sunny side and the sunny side of the concrete structure is avoided, and the problem of the normal slip form construction under the high-temperature and sunny side large-temperature-difference severe climate environment is effectively solved;
And the concrete structure sliding formwork construction system under the high-temperature and sunny side large-temperature-difference environment overcomes the defect that the high-temperature and sunny side large-temperature-difference environment causes difficulty in sliding formwork construction, is novel and unique in thought, convenient and simple in measure and use, low in cost, excellent in effect, strong in practicability, good in operability and expansibility, provides a borrowable example and an operable hint for sliding formwork construction under the high-temperature and strong-illumination environment, and provides another method with opening property for sliding formwork construction, so that the concrete structure sliding formwork construction system has popularization and application values.
In the description of the above specification:
The terms "this embodiment," an embodiment of the invention, "" as shown, "further," "as an alternative to the invention," and the like, mean that a particular feature, structure, material, or characteristic described in the embodiment or example is included in at least one embodiment or example of the invention;
in this specification, a schematic representation of the above terms is not necessarily directed to the same embodiment or example, and the particular features, structures, materials, or characteristics described, etc. may be combined or combined in any suitable manner in any one or more embodiments or examples;
furthermore, various embodiments or examples, as well as features of various embodiments or examples, described in this specification may be combined or combined by one of ordinary skill in the art without undue experimentation.
Finally, it should be noted that:
The above embodiments are only for illustrating the technical solution of the present invention, not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified, or equivalent substitutions for some or all of the features, without departing from the scope of the embodiments of the present invention, and the technical field will not be limited to the essential modifications, the modifications and the substitutions.