CN113202317B - Construction and maintenance method for subtropical large-volume concrete - Google Patents

Construction and maintenance method for subtropical large-volume concrete Download PDF

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Publication number
CN113202317B
CN113202317B CN202110478591.3A CN202110478591A CN113202317B CN 113202317 B CN113202317 B CN 113202317B CN 202110478591 A CN202110478591 A CN 202110478591A CN 113202317 B CN113202317 B CN 113202317B
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China
Prior art keywords
water
concrete
heat
subtropical
temperature
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CN113202317A (en
Inventor
曹军
庞保平
邱海永
李季
张生宝
张辉
樊磊
王成泰
王辉
朵玉贤
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Sinohydro Engineering Bureau 4 Co Ltd
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Sinohydro Engineering Bureau 4 Co Ltd
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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
    • E04G21/24Safety or protective measures preventing damage to building parts or finishing work during construction
    • E04G21/246Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0075Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of a decrease in temperature
    • 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
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0004Synthetics
    • E02D2300/0018Cement used as binder
    • E02D2300/002Concrete

Abstract

The invention provides a construction and maintenance method for subtropical large-volume concrete, which comprises the following steps: paving a cooling water pipe on the upper surface of the concrete in an S shape; building a vault framework above the concrete area, and horizontally arranging a water distribution pipe communicated with a cooling water pipe at the top of the framework; laying double-side heat-insulating bubble films on the upper part of the vault framework; the water outlet is communicated into a water storage container, a water pump is arranged in the water storage container, and a water outlet pipe of the water pump is connected with a cooling water pipe to form a circulating pipeline; and cooling the water in the water storage container by the refrigeration equipment at the preset lowest power. The invention constructs a three-dimensional heat preservation and cooling system, and utilizes the vault framework and the heat-insulation bubble films on the two sides to form a closed heat-insulation space; the refrigeration power of the refrigeration equipment is adjusted by detecting the temperature inside the heat insulation space, so that the temperature inside the heat insulation space is ensured to be constant.

Description

Construction and maintenance method for subtropical large-volume concrete
Technical Field
The invention relates to the technical field of concrete construction, in particular to a construction and maintenance method for subtropical large-volume concrete.
Background
After the concrete is poured, the concrete needs to be maintained for 15 days at a proper temperature to fully exert the hydration. Because the concrete is subjected to hydration, heat is continuously released, if the heat cannot be timely dissipated, the continuous hydration is hindered or delayed, the effect is not good, various indexes of the formed concrete are reduced, and the design requirement cannot be met.
Under the condition, the concrete curing method is particularly obvious under the hot tropical and subtropical climate conditions, so that when large-volume concrete pouring construction is carried out in the tropical and subtropical climate, the problem of concrete curing under the continuous high-temperature condition must be solved, and the concrete curing and cooling link is very critical.
Disclosure of Invention
In view of the above technical problems, embodiments of the present invention provide a construction and maintenance method for subtropical zone large-volume concrete, which solves the problem of keeping the concrete in a low-temperature state during construction and maintenance of the subtropical zone and subtropical zone large-volume concrete.
A construction and maintenance method for subtropical large-volume concrete comprises the following steps:
after the concrete pouring is finished, paving a cooling water pipe on the upper surface of the concrete in an S shape;
building a vault framework above the concrete area, and horizontally arranging a water distribution pipe communicated with a cooling water pipe at the top of the framework;
laying double-side heat-insulation bubble films on the upper part of the vault framework, enabling four sides of the double-side heat-insulation bubble films to vertically fall to the ground around the concrete area so as to form a closed heat-insulation space above the concrete area, and leading out a plurality of water pipes from the water distribution pipes to be communicated into gaps of the double-side heat-insulation bubble films;
the four sides of the heat-insulating bubble films on the two sides are sealed and are provided with a plurality of water outlets, the water outlets are communicated into a water storage container, a water pump is arranged in the water storage container, and a water outlet pipe of the water pump is connected with a cooling water pipe to form a circulating pipeline;
cooling the water in the water storage container by refrigeration equipment at a preset lowest power;
by detecting the temperature in the heat insulation space, when the temperature is higher than a first preset value, the refrigerating power of the refrigerating equipment is increased;
after a preset time, when the temperature of the refrigerating equipment is still greater than the first preset value, the refrigerating power of the refrigerating equipment is increased again; when the temperature of the refrigeration equipment is lower than a first preset value, maintaining the current refrigeration power of the refrigeration equipment;
by detecting the temperature inside the heat insulation space, when the temperature is lower than a second preset value, the refrigerating power of the refrigerating equipment is reduced, and the second preset value is smaller than the first preset value;
after a preset time, when the temperature of the refrigeration equipment is still lower than a second preset value, the refrigeration power of the refrigeration equipment is reduced again, and if the current refrigeration power of the refrigeration equipment is equal to the lowest power, the operation of the lowest power is maintained.
The double-side heat-insulation bubble film comprises canvas waterproof layers on two sides and a bubble layer in the middle, wherein bubbles in the bubble layer are uniformly distributed between the two canvas waterproof layers, the two sides of the bubbles are connected with the canvas waterproof layers to form a closed structure, and gaps are formed between the bubbles to allow water to flow through.
The first preset value is 15 ℃; the second preset value is 9 ℃.
The preset time is 3-5 minutes.
The lowest refrigerating power of the refrigerating equipment is 10-20kw, and the increasing or decreasing amplitude of each time is 1-2 kw.
The water storage container is a closed structure container, and a heat insulation layer is arranged outside the water storage container.
The whole vault frame is rectangular, the middle bulge forms a vault shape, two sides are plane inclined, and the inclination angle is not more than 5 degrees.
The water distribution pipe is positioned below the vault and is horizontally arranged.
The cooling water pipe is a flexible thin-wall rubber pipe.
The invention constructs a three-dimensional heat preservation and cooling system, and utilizes the vault framework and the heat-insulation bubble films on the two sides to form a closed heat-insulation space; through detecting the inside temperature in thermal-insulated space, adjust refrigeration plant's refrigeration power to ensure the inside constancy of temperature in thermal-insulated space, when inside temperature rises because ambient temperature is high or because hydration, through increaseing refrigeration plant's refrigeration power, in time take away the heat, thereby maintain the low temperature state in the thermal-insulated space, promote the completion of hydration, can be applied to in tropical, subtropical environment, effectively solved the high temperature problem that high temperature environment + hydration's combined action brought.
The construction and maintenance method for the subtropical zone large-volume concrete, provided by the invention, provides an energy-saving and efficient solution for the construction of the subtropical zone and the tropical zone concrete, improves the concrete maintenance effect, promotes the hydration of the concrete, and improves the strength of the concrete;
the invention is environment-friendly and energy-saving, reduces energy consumption and has no pollution; the environmental heat is reduced to permeate into the system, and water and electricity are saved.
Drawings
The invention may be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings, in which:
other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.
FIG. 1 is a schematic structural diagram of a construction and maintenance method for subtropical bulk concrete provided by an embodiment of the invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the invention. In the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.
Example embodiments will now be described with reference to the accompanying drawings, which may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
As shown in FIG. 1, the invention provides a construction and maintenance method for subtropical large-volume concrete, which comprises the following steps:
after the concrete pouring is finished, paving a cooling water pipe on the upper surface of the concrete in an S shape;
building a vault framework above the concrete area, and horizontally arranging a water distribution pipe communicated with a cooling water pipe at the top of the framework;
laying double-side heat-insulation bubble films on the upper part of the vault framework, enabling four sides of the double-side heat-insulation bubble films to vertically fall to the ground around the concrete area so as to form a closed heat-insulation space above the concrete area, and leading out a plurality of water pipes from the water distribution pipes to be communicated into gaps of the double-side heat-insulation bubble films;
the four sides of the heat-insulating bubble films on the two sides are sealed and are provided with a plurality of water outlets, the water outlets are communicated into a water storage container, a water pump is arranged in the water storage container, and a water outlet pipe of the water pump is connected with a cooling water pipe to form a circulating pipeline;
cooling the water in the water storage container by refrigeration equipment at a preset lowest power;
by detecting the temperature in the heat insulation space, when the temperature is higher than a first preset value, the refrigerating power of the refrigerating equipment is increased;
after a preset time, when the temperature of the refrigerating equipment is still greater than the first preset value, the refrigerating power of the refrigerating equipment is increased again; when the temperature of the refrigeration equipment is lower than a first preset value, maintaining the current refrigeration power of the refrigeration equipment;
by detecting the temperature inside the heat insulation space, when the temperature is lower than a second preset value, the refrigerating power of the refrigerating equipment is reduced, and the second preset value is smaller than the first preset value;
after a preset time, when the temperature of the refrigeration equipment is still lower than a second preset value, the refrigeration power of the refrigeration equipment is reduced again, and if the current refrigeration power of the refrigeration equipment is equal to the lowest power, the operation of the lowest power is maintained.
The double-side heat-insulation bubble film comprises canvas waterproof layers on two sides and a bubble layer in the middle, wherein bubbles in the bubble layer are uniformly distributed between the two canvas waterproof layers, the two sides of the bubbles are connected with the canvas waterproof layers to form a closed structure, and gaps are formed between the bubbles to allow water to flow through.
The first preset value is 15 ℃; the second preset value is 9 ℃.
The preset time is 3-5 minutes.
The lowest refrigerating power of the refrigerating equipment is 10-20kw, and the increasing or decreasing amplitude of each time is 1-2 kw.
The water storage container is a closed structure container, and a heat insulation layer is arranged outside the water storage container.
The whole vault frame is rectangular, the middle bulge forms a vault shape, two sides are plane inclined, and the inclination angle is not more than 5 degrees.
The water distribution pipe is positioned below the vault and is horizontally arranged.
The cooling water pipe is a flexible thin-wall rubber pipe.
The invention constructs a three-dimensional heat preservation and cooling system, and utilizes the vault framework and the heat-insulation bubble films on the two sides to form a closed heat-insulation space; through detecting the inside temperature in thermal-insulated space, adjust refrigeration plant's refrigeration power to ensure the inside constancy of temperature in thermal-insulated space, when inside temperature rises because ambient temperature is high or because hydration, through increaseing refrigeration plant's refrigeration power, in time take away the heat, thereby maintain the low temperature state in the thermal-insulated space, promote the completion of hydration, can be applied to in tropical, subtropical environment, effectively solved the high temperature problem that high temperature environment + hydration's combined action brought.
The construction and maintenance method for the subtropical zone large-volume concrete, provided by the invention, provides an energy-saving and efficient solution for the construction of the subtropical zone and the tropical zone concrete, improves the concrete maintenance effect, promotes the hydration of the concrete, and improves the strength of the concrete;
the invention is environment-friendly and energy-saving, reduces energy consumption and has no pollution; the environmental heat is reduced to permeate into the system, and water and electricity are saved.
It will be appreciated by persons skilled in the art that the above embodiments are illustrative and not restrictive. Different features which are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the specification and the claims. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to denote a name and not to denote any particular order.

Claims (8)

1. A construction and maintenance method for subtropical large-volume concrete is characterized by comprising the following steps:
after the concrete pouring is finished, paving a cooling water pipe on the upper surface of the concrete in an S shape;
building a vault framework above the concrete area, and horizontally arranging a water distribution pipe communicated with a cooling water pipe at the top of the framework;
laying double-side heat-insulation bubble films on the upper part of the vault framework, enabling four sides of the double-side heat-insulation bubble films to vertically fall to the ground around the concrete area so as to form a closed heat-insulation space above the concrete area, and leading out a plurality of water pipes from the water distribution pipes to be communicated into gaps of the double-side heat-insulation bubble films;
the four sides of the heat-insulating bubble films on the two sides are sealed and are provided with a plurality of water outlets, the water outlets are communicated into a water storage container, a water pump is arranged in the water storage container, and a water outlet pipe of the water pump is connected with a cooling water pipe to form a circulating pipeline;
cooling the water in the water storage container by refrigeration equipment at a preset lowest power;
by detecting the temperature in the heat insulation space, when the temperature is higher than a first preset value, the refrigerating power of the refrigerating equipment is increased;
after a preset time, when the temperature of the refrigerating equipment is still greater than the first preset value, the refrigerating power of the refrigerating equipment is increased again; when the temperature of the refrigeration equipment is lower than a first preset value, maintaining the current refrigeration power of the refrigeration equipment;
by detecting the temperature inside the heat insulation space, when the temperature is lower than a second preset value, the refrigerating power of the refrigerating equipment is reduced, and the second preset value is smaller than the first preset value;
after a preset time, when the temperature of the refrigeration equipment is still lower than a second preset value, reducing the refrigeration power of the refrigeration equipment again, and if the current refrigeration power of the refrigeration equipment is equal to the lowest power, maintaining the lowest power to operate;
the double-side heat-insulation bubble film comprises canvas waterproof layers on two sides and a bubble layer in the middle, wherein bubbles in the bubble layer are uniformly distributed between the two canvas waterproof layers, the two sides of the bubbles are connected with the canvas waterproof layers to form a closed structure, and gaps are formed between the bubbles to allow water to flow through.
2. The construction and maintenance method for subtropical bulk concrete according to claim 1,
the first preset value is 15 ℃; the second preset value is 9 ℃.
3. The construction and maintenance method for subtropical bulk concrete according to claim 1,
the preset time is 3-5 minutes.
4. The construction and maintenance method for subtropical large-volume concrete according to claim 1, wherein the minimum refrigerating power of the refrigerating equipment is 10-20kw, and the range of each increase or decrease is 1-2 kw.
5. The construction and maintenance method for subtropical large-volume concrete according to claim 1 or 2,
the water storage container is a closed structure container, and a heat insulation layer is arranged outside the water storage container.
6. The construction and maintenance method for subtropical large-volume concrete according to claim 1 or 2,
the whole vault frame is rectangular, the middle bulge forms a vault shape, two sides are plane inclined, and the inclination angle is not more than 5 degrees.
7. The construction and maintenance method for subtropical large-volume concrete according to claim 1 or 2,
the water distribution pipe is positioned below the vault and is horizontally arranged.
8. The construction and maintenance method for subtropical large-volume concrete according to claim 1 or 2,
the cooling water pipe is a flexible thin-wall rubber pipe.
CN202110478591.3A 2021-04-30 2021-04-30 Construction and maintenance method for subtropical large-volume concrete Active CN113202317B (en)

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