CN117536363A - Energy-saving heat-preserving building wall structure and construction method thereof - Google Patents

Energy-saving heat-preserving building wall structure and construction method thereof Download PDF

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Publication number
CN117536363A
CN117536363A CN202410032830.6A CN202410032830A CN117536363A CN 117536363 A CN117536363 A CN 117536363A CN 202410032830 A CN202410032830 A CN 202410032830A CN 117536363 A CN117536363 A CN 117536363A
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China
Prior art keywords
vibration
auxiliary piece
path
rib
concrete
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Granted
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CN202410032830.6A
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Chinese (zh)
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CN117536363B (en
Inventor
张振
聂建春
赵哲
郁小强
李�杰
靳博
邬超慧
宋瑞军
阿如汉
于志力
杨正良
李晨霞
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Economic and Technological Research Institute of State Grid Inner Mongolia Electric Power Co Ltd
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Economic and Technological Research Institute of State Grid Inner Mongolia Electric Power Co Ltd
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Priority to CN202410032830.6A priority Critical patent/CN117536363B/en
Publication of CN117536363A publication Critical patent/CN117536363A/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • 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
    • 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
    • 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
    • E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
    • E04G21/08—Internal vibrators, e.g. needle vibrators
    • 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
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/90—Passive houses; Double facade technology

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

The invention relates to the technical field of prefabricated walls, in particular to an energy-saving heat-preserving building wall structure and a construction method thereof, wherein the construction method comprises the following steps: processing a connecting groove, and fixedly connecting a first auxiliary piece in the connecting groove; placing the heat preservation layer in a corresponding mold, and arranging a reinforcement cage for reserving a vibration space; pouring concrete to a first height and simultaneously controlling the mould to vibrate for one time; judging whether secondary vibration is carried out or not and whether the position of the die is adjusted or not according to the detection parameters of the first auxiliary piece; laying the second auxiliary piece on the concrete surface; the inserted vibration rib moves on the vibration track and vibrates the vibration rib; pouring concrete to a target height, determining vibration frequency according to the elevation fluctuation quantity of the second auxiliary piece in the moving process of the vibration rib, vibrating, and forming a wall body; by utilizing the flexible and portable characteristics of the assembled wall body, vibration is carried out in stages and parameters of each stage are regulated, so that the robustness of the strength of the prefabricated wall body is effectively improved.

Description

Energy-saving heat-preserving building wall structure and construction method thereof
Technical Field
The invention relates to the technical field of prefabricated walls, in particular to an energy-saving heat-preserving building wall structure and a construction method thereof.
Background
The prefabricated heat insulating wall is one modern wall structure and is installed in the field after being prefabricated in factory. Typically, prefabricated wall panels consist of two concrete facings and an intermediate insulating material. The concrete surface layer can be cast by using a steel mould, and the heat insulation material can be a polystyrene foam board, a rock wool board and the like.
Chinese patent publication No. CN110499844a discloses a thermal insulation wall and a construction method of the thermal insulation wall, which can form the thermal insulation wall. The heat-insulating wall body comprises a reinforced concrete base layer, a first heat-insulating layer, a decorative layer, a first rigid member, a second rigid member and a fastener, wherein the reinforced concrete base layer, the first heat-insulating layer and the decorative layer are sequentially arranged from inside to outside; the reinforced concrete base layer and the first heat preservation layer are anchored together through a first rigid connecting member; the second rigid connecting member is fixedly connected with the first rigid connecting member, and the outer end surface of the second rigid member is attached to the inner side surface of the decorative plate to form a mounting surface of the decorative plate; the fastener secures the trim panel to the outer end surface of the second rigid connecting member. The heat-insulating wall and the construction method of the heat-insulating wall realize the assembled installation of the decorative layer; the decoration layer is firmly fixed, has good flatness, and has the advantages of no slurry leakage at the spliced position of the first heat-preserving layer, good flatness, good fireproof performance and the like; in addition, chinese patent publication No. CN209799066U discloses an assembled wall, it includes concrete wall and heat preservation subassembly, the outside of concrete wall has a plurality of buckle spare, a plurality of buckle groove has been seted up on the heat preservation subassembly, the buckle groove with buckle spare one-to-one, just the buckle spare connect in the buckle groove. Connect in the buckle groove through buckle spare, effectively improved the joint strength between concrete wall body and the heat preservation subassembly, simultaneously, improved the efficiency of construction, and improved the fastness and the security of assembled wall body greatly. Therefore, the technical scheme discloses a technical means or conception for carrying out multilayer prefabrication on the heat-insulating wall body, but the staged detection and control on concrete pouring in the prefabrication process of the wall body are not considered, so that the strength robustness of the prefabricated wall body is poor.
Disclosure of Invention
Therefore, the invention provides an energy-saving heat-preserving building wall structure and a construction method thereof, which are used for solving the problem that the strength robustness of a prefabricated wall is poor due to the fact that the staged detection and control of concrete pouring in the process of prefabricating the wall are not considered in the prior art.
In order to achieve the above purpose, in one aspect, the present invention provides a construction method of an energy-saving and heat-preserving building wall, including:
step S1, machining a connecting groove in the geometric center of the outer side of the heat preservation layer, and fixedly connecting a first auxiliary piece in the connecting groove;
step S2, placing the heat preservation layer in a corresponding mold, and arranging a reinforcement cage with a reserved vibration space;
s3, pouring concrete into the die to a first height and controlling the die to vibrate for one time;
step S4, judging whether secondary vibration is carried out or not and whether the position of the die is adjusted or not according to the detection parameters of the first auxiliary piece;
s5, pouring concrete to a second height, and paving a second auxiliary piece on the surface of the concrete;
step S6, inserting a vibration rib on the vibration track of the second auxiliary piece along the direction perpendicular to the heat insulation layer, vibrating the vibration rib while moving on the vibration track, calculating a fluctuation characteristic value according to the vibration duration of the secondary vibration in the step S4 and the adjustment amount of the mold position and the submergence depth of the second auxiliary piece in the step S5, and determining the moving path of the vibration rib according to the fluctuation characteristic value;
s7, screwing one end of the vibration rib into the connecting groove, bending the other end of the vibration rib to be in contact with the second auxiliary piece, pouring concrete to a target height, determining vibration frequency according to the elevation fluctuation amount of the second auxiliary piece in the moving process of the vibration rib, vibrating, and forming a wall body;
the inside of first auxiliary member is equipped with the detection pearl, the second auxiliary member is provided with vibrating rail's circular panel, detect the parameter including detect the pearl with the collision number of times of the inner wall of first auxiliary member and detect the pearl and be in the position of the bottom surface of first auxiliary member, vibrating space covers vibrating rail.
Further, the first auxiliary piece is provided with a through hole in the center and is provided with a circular truncated cone structure which is annularly hollow around the through hole, and the detection beads can freely move in the cavity of the first auxiliary piece;
after the step S4 is completed, if the detection bead is located at the side of the first auxiliary member away from the through hole, it is determined that the one end of the mold in the direction of the detection bead is increased and adjusted until the detection bead is located at the side of the first auxiliary member close to the through hole.
Further, in the step S4, if the number of collisions of the detection beads is less than a preset number, determining to perform secondary vibration and determining a vibration duration of the secondary vibration according to the number of collisions;
wherein the vibration duration is inversely related to the number of collisions.
Further, in the step S6, the fluctuation feature value is positively correlated with the vibration duration, the adjustment amount, and the immersion depth.
Further, in the step S6, the moving path includes a first path, a second path, and a third path;
the first path is from a first path starting point to a first path ending point in a clockwise arc track, the second path is from the first path starting point to the first path ending point in a clockwise arc track, and then from the first path ending point to the first path starting point in a anticlockwise arc track, and the third path is from a third path starting point to a third path ending point in a zigzag track.
Further, in the step S6, a fluctuation level is determined according to the fluctuation feature value, and the corresponding movement path is determined according to the fluctuation level.
Further, in the step S7, the elevation fluctuation amount is an elevation distance between a highest position and a lowest position of the second auxiliary member in the process of vibrating the vibrating rib, and the vibration frequency is positively correlated with the elevation fluctuation amount.
Further, the first height is determined according to the quality of the heat preservation layer, and the second height is determined according to the height of the steel reinforcement framework;
the first height and the quality of the heat preservation layer are in negative correlation, and the second height meets the condition that concrete covers the steel reinforcement framework and the second auxiliary piece is not contacted with the steel reinforcement framework after the second auxiliary piece is placed.
In another aspect, the present invention provides an energy-saving and heat-preserving building wall structure, comprising:
the concrete vibrating device comprises a first auxiliary piece, a second auxiliary piece, a heat preservation layer, a concrete layer and vibrating ribs;
the heat insulation layer is arranged on the inner side of the prefabricated wall body, and a connecting groove matched with the first auxiliary piece and the vibration rib is formed in the geometric center of the outer side face of the heat insulation layer;
the first auxiliary piece is a hollow round platform with a round through hole in the center;
the second auxiliary piece is a round plate arranged in the concrete layer, and a special-shaped hole for providing a track for the movement of the vibration rib in the wall construction process is formed in the center of the round plate;
the vibration rib is an L-shaped steel bar with one threaded end, one threaded end of the vibration rib is in threaded connection with the connecting groove, the vibration rib sequentially penetrates through the circular through hole of the first auxiliary piece and the special-shaped hole of the second auxiliary piece from inside to outside, the bending position of the vibration rib is overlapped with the circle center position of the outer side of the second auxiliary piece, and the outer side part of the bending position of the vibration rib is fixedly connected with the outer side of the second auxiliary piece;
the concrete layer is arranged on the outer side of the heat preservation layer, a steel reinforcement framework is arranged inside the concrete layer, and the steel reinforcement framework is arranged between the heat preservation layer and the second auxiliary piece along the direction from inside to outside.
Further, the larger end face of the two end faces of the first auxiliary piece faces the heat insulation layer, the special-shaped hole is provided with four protruding portions and a recessed portion, and each protruding portion and each recessed portion are used for limiting movement of the vibrating rib and forming different tracks.
Compared with the prior art, the method has the advantages that the method utilizes the flexible and portable characteristics of the assembled wall body, the concrete pouring process is divided into the steps of directly vibrating the whole mould when the total amount of concrete is small so as to reduce air bubbles in the concrete, uniformity is improved, vibrating reinforcing steel bars inserted into the concrete to vibrate when the total amount of concrete is moderate so as to secondarily remove the air bubbles and improve the uniformity, conventional vibrating is adopted when the total mass is high, the direct vibrating mould is low in difficulty when the total amount of concrete is small, vibrating kinetic energy can be effectively transmitted to each part of the concrete, compared with the traditional vibrating mould, vibrating efficiency and the concrete performance after vibrating can be improved, the first auxiliary piece is arranged to effectively monitor the transmitting effect of the vibrating kinetic energy and the placing state of the mould, and the limit of the vibrating bars is used for enabling the vibrating bars to safely move in the concrete and not touch the reinforcing steel bars, so that the quality uniformity of the whole concrete is improved while the construction quality is ensured, the characteristic of being movable of the prefabricated wall body is effectively utilized, parameters of each stage of vibrating can be optimized, the vibrating strength of the concrete is improved, and the air bubble uniformity in the prefabricated wall body is further improved.
Further, compared with the traditional vibration, the method does not need to pull out the vibration head, utilizes the vibration rib to replace the effect of the vibration head, directly fixedly connects the vibration rib with the heat insulation layer and the second auxiliary piece after the vibration is finished, avoids the influence of the process of taking out the vibration head on the concrete forming quality, and further improves the robustness of the strength of the prefabricated wall body.
Furthermore, the first auxiliary piece is arranged between the heat insulation layer and the concrete, the impact times of the detection beads in the first auxiliary piece can effectively represent the effect of vibration kinetic energy received by the concrete, the effect of discharging bubbles through vibration is further guaranteed, and the robustness of the strength of the prefabricated wall body is further improved.
Further, the moving path of the vibrating bar is determined through the calculated fluctuation characteristic value, the non-fluctuation characteristic value can reflect the requirement level of concrete for vibration, the deeper the sinking depth is, the longer the vibration time is, the larger the displacement adjustment quantity is, the more uneven concrete quality is indicated, the moving path of the vibrating bar is determined through the calculated fluctuation characteristic value, the construction efficiency and the vibration effect of different moving paths are different, the more uneven concrete has the requirement level for vibration, but the more complicated moving path can lead to lower construction efficiency, the different paths are selected for different fluctuation characteristic values, the construction efficiency is improved, and the robustness of the strength of the prefabricated wall body is further improved.
Furthermore, the wall structure of the invention utilizes the mutual clamping of the components and the serial connection of the parts by the vibration ribs, so that the parts of the wall are tightly connected, the structural strength of the prefabricated wall is improved, and the robustness of the strength of the prefabricated wall is further improved.
Furthermore, the first auxiliary piece, the second auxiliary piece and the vibration rib have the function of optimizing the concrete forming quality in the wall construction, can improve the structural strength in the wall construction, improve the construction effect and the use effect, avoid material waste, reduce the construction efficiency and further improve the strength robustness of the prefabricated wall.
Drawings
FIG. 1 is a flow chart of a method for constructing an energy-saving and heat-preserving building wall according to an embodiment of the invention;
FIG. 2 is a schematic view of a wall structure of a building according to an embodiment of the present invention;
FIG. 3 is a schematic view of a first auxiliary element according to an embodiment of the present invention;
FIG. 4 is a schematic view of a second auxiliary element according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating connection between a vibration rib and a second auxiliary member according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 and fig. 2, which are a flow chart of a construction method of an energy-saving and heat-preserving building wall according to an embodiment of the present invention and a schematic diagram of a building wall structure according to an embodiment of the present invention, the embodiment of the present invention provides an energy-saving and heat-preserving building wall structure, which includes:
a first auxiliary piece 5, a second auxiliary piece 3, a heat preservation layer 1, a concrete layer 2 and vibration ribs 4;
wherein, the heat preservation layer 1 is arranged on the inner side of the prefabricated wall body, and the geometric center of the outer side surface of the heat preservation layer is internally provided with a connecting groove matched with the first auxiliary piece 5 and the vibration rib 4;
referring to fig. 3 and 4 in conjunction with fig. 2, fig. 3 is a schematic view of a first auxiliary member according to an embodiment of the present invention, fig. 4 is a schematic view of a second auxiliary member according to an embodiment of the present invention, and the first auxiliary member 5 is a hollow circular truncated cone with a circular through hole at the center;
the second auxiliary piece 3 is a round plate arranged in the concrete layer 2, and the center of the round plate is provided with a special-shaped hole for providing a track for the movement of the vibration rib in the wall construction process;
the vibration rib 4 is an L-shaped steel bar with one threaded end, one threaded end of the vibration rib 4 is in threaded connection with the connecting groove, the vibration rib 4 sequentially penetrates through the circular through hole of the first auxiliary piece 5 and the special-shaped hole of the second auxiliary piece 3 from inside to outside, the bending position of the vibration rib 4 coincides with the circle center position of the outer side of the second auxiliary piece 3, and the outer side part of the bending position of the vibration rib 4 is fixedly connected with the outer side of the second auxiliary piece 3;
the concrete layer 2 is arranged on the outer side of the heat preservation layer 1, a steel reinforcement framework is arranged inside the concrete layer 2, and the steel reinforcement framework is arranged between the heat preservation layer 1 and the second auxiliary piece 3 along the direction from inside to outside.
The larger end face of diameter among the two end faces of the first auxiliary piece 5 faces the heat preservation 5, and the special-shaped hole is provided with four protruding portions and a recessed portion, and each protruding portion and recessed portion are used for limiting movement of the vibrating rib and forming different tracks.
The wall structure utilizes the mutual clamping of the components to realize the full fixation of all parts of the wall, and the robustness of the strength of the prefabricated wall is further improved.
The embodiment of the invention also provides a construction method for forming the wall body, which comprises the following steps:
step S1, machining a connecting groove in the geometric center of the outer side of the heat preservation layer, and fixedly connecting a first auxiliary piece in the connecting groove;
step S2, placing the heat preservation layer in a corresponding mold, and arranging a reinforcement cage with a reserved vibration space;
it can be understood that the prefabricated mold can be set as a mold of any structure or any process according to actual working conditions, the prefabricated wall body of the type with concrete layers arranged on two sides of the heat preservation layer can be a mold after casting a layer of concrete, and the prefabricated wall body with the decorative layer arranged on the outer side can be a semi-finished product mold after laying and casting the decorative layer.
S3, pouring concrete into the die to a first height and controlling the die to vibrate for one time;
in the implementation, the method for controlling the mold to vibrate can be to reserve a mounting hole on the bottom surface of the mold, fix the mold on a vibration table through the mounting hole to vibrate, or directly press and vibrate on the vibration table through a pressing rod, the vibration parameters of the vibration table are high-frequency small-displacement vibration, preferably, the vibration parameters of the vibration table meet the conditions that the frequency is greater than 500Hz and smaller than 2000Hz, the amplitude is greater than 0.05mm and smaller than 0.1mm, the vibration direction is any direction parallel to the plane of the heat preservation layer, and the vibration duration of one vibration is set to be 10min.
Step S4, judging whether secondary vibration is carried out or not and whether the position of the die is adjusted or not according to the detection parameters of the first auxiliary piece;
s5, pouring concrete to a second height, and paving a second auxiliary piece on the surface of the concrete;
in practice, the second auxiliary member should be laid flat so that the center of the circle of the second auxiliary member is aligned with the geometric center of the outer side surface of the heat-insulating layer.
Wherein the second auxiliary piece is a plate provided with a vibration track;
step S6, inserting a vibration rib on a vibration track of the second auxiliary piece along a direction perpendicular to the heat preservation layer, vibrating the vibration rib while moving on the vibration track, calculating a fluctuation characteristic value according to the vibration duration of the secondary vibration in step S4 and the adjustment amount of the mold position and the submergence depth of the second auxiliary piece in step S5, and determining the moving path of the vibration rib according to the fluctuation characteristic value;
s7, screwing one end of the vibration rib into the connecting groove, bending the other end of the vibration rib to be in contact with the second auxiliary piece, pouring concrete to a target height, determining vibration frequency according to the elevation fluctuation quantity of the second auxiliary piece in the moving process of the vibration rib, vibrating, and forming a wall body; wherein, the inside of first auxiliary member is equipped with detects the pearl, and the second auxiliary member is provided with vibrating rail's circular panel, and detection parameter includes the collision number of times of detecting the pearl and the inner wall of first auxiliary member and detects the position of pearl in the bottom surface of first auxiliary member, and vibrating space covers vibrating rail.
When the vibration rib is screwed into the connecting groove, the matching clearance between the thread at the connecting end of the vibration rib and the thread in the connecting groove is required to be larger than 5mm and smaller than 1cm in consideration of flowing concrete, so that the vibration rib can be smoothly screwed in.
The method is characterized in that the assembled wall body is utilized to flexibly and lightly divide the concrete pouring process into the process of directly vibrating the whole mould to reduce air bubbles in the concrete when the total amount of the concrete is small, the uniformity is improved, vibrating steel bars inserted into the concrete to vibrate to secondarily remove the air bubbles and improve the uniformity, conventional vibration is adopted when the total mass is high, the direct vibrating mould is low in difficulty and vibration kinetic energy can be effectively transmitted to each part of the concrete when the total amount of the concrete is small, compared with the traditional vibration, the direct vibrating mould can improve the vibration efficiency and the concrete performance after vibration, for vibration of vibration bars, the vibration bars move in the concrete and do not touch the steel bars, the quality uniformity of the whole concrete is improved while the construction quality is ensured, the characteristic of being movable by the prefabricated wall body is effectively utilized, parameters of each stage of vibration are optimized by utilizing the characteristic, the uniformity of the concrete is improved, the air bubble content in the concrete is reduced, and the strength robustness of the prefabricated wall body is effectively improved.
In practice, the time interval of the steps is less than 10min and the total time duration is less than 2h, so as to avoid that the concrete solidification cannot vibrate or further construction is influenced. The heat preservation layer is arranged to enable the prefabricated wall body to be capable of effectively preserving heat in use, and further heat supply energy is saved.
With continued reference to fig. 3, the first auxiliary member has a through hole in the center and a circular truncated cone structure surrounding the through hole and being hollow in a ring shape, and the detection beads can freely move in the cavity of the first auxiliary member.
After step S4 is completed, if the detection bead is located at the side of the first auxiliary member away from the through hole, it is determined that the mold is adjusted to be increased at one end of the detection bead direction until the detection bead is located at the side of the first auxiliary member close to the through hole. If the detection bead is positioned on one side of the first auxiliary piece close to the through hole, judging that the position of the die is normal.
The mold is free of offset or smaller in offset after vibrating when being close to the center position, and the mold is required to be adjusted to avoid influencing the molding quality of the prefabricated wall after being far away from the center position. Preferably, the detection beads are iron beads and have a diameter of 1/20 of the height of the round table, the material of the first auxiliary piece is an organic material, and the positions of the detection beads are determined by the steel bar detector.
Example 1: in a certain construction of the construction method, after one vibration is finished, the detection beads are detected to be positioned on the southward side of the center of a through hole of the first auxiliary piece through the steel bar detector, the southward side of the die is lifted at the speed of 0.1mm/s through the jack and the fixing mechanism, the detection beads are moved to the side, close to the through hole, of the first auxiliary piece after 10s, lifting is stopped, and the current state is maintained by installing a plurality of cushion blocks at the bottom of the southward side of the die so that the die is kept horizontal.
Specifically, in step S4, if the number of collisions of the detection beads is smaller than the preset number, it is determined to perform the secondary vibration and the vibration duration of the secondary vibration is determined according to the number of collisions.
Optionally, the preset times are 1000 times for a scene where the total mass of the concrete is less than 10 kg.
For scenes with the total mass of the concrete being more than or equal to 10kg and less than or equal to 30kg, the preset times are 1500 times.
For a scene where the total mass of the concrete is greater than 30kg, the preset times are 2000 times,
in practice, the total mass of concrete poured to the first level should be less than 50kg.
It can be appreciated that the preset times can be set to other values according to the actual working conditions and scenes, or can be set to a plurality of changeable determined values, and only the expected vibration effect can be achieved, which is not described herein.
The vibration duration is inversely related to the number of collisions, and the vibration duration of the secondary vibration should be greater than 2min and less than 10min.
The number of collisions is too small, which means that the energy of the vibration is not effectively transferred to the concrete layer, secondary vibration is required, and the smaller the number of collisions, the longer the vibration duration of the secondary vibration is required.
Preferably, the number of collisions of the detection beads is determined by the acquisition of the collision sound waves, and the number of collisions is the number of times that the acquired collision sound waves coincide with the collision tone and the loudness is greater than the sound waves of a preset loudness. The preset loudness is determined according to the thickness of the concrete, and the preferred value is 60dB. The collision tone is a theoretical tone that can be generated by collision of the detection bead with the inner wall of the first auxiliary member. Through installing first auxiliary member between heat preservation and concrete, detect the collision number of times of pearl in the first auxiliary member can effectively characterize the effect of the vibration kinetic energy that the concrete received, and then ensured the effect of vibration discharge bubble, further improved the robustness of prefabricated wall body intensity.
Specifically, in step S6, the fluctuation feature value is determined based on the vibration duration of the secondary vibration, the adjustment amount of the mold position, and the immersion depth of the second auxiliary member.
The fluctuation characteristic value is positively correlated with the vibration duration t, the adjustment amount and the immersion depth. In practice, the adjustment D of the mold position is the maximum distance moved in the vertical direction, and the immersion depth D of the second auxiliary member is the maximum depth of the second auxiliary member covered by concrete in the circumferential and lateral directions.
Preferably, the material of the second auxiliary member is the same as that of the reinforcement cage.
Preferably, the fluctuation feature value K is determined by the following formula:
wherein D0 is the height of the mold, t0 is the vibration duration of the primary vibration, D0 is the thickness of the second auxiliary member, and if the position of the mold is not adjusted or the secondary vibration is not performed, the corresponding D/D0 term or t/t0 term in the formula is 0. The fluctuation characteristic value can reflect the demand level of concrete for vibration, the deeper the immersion depth is, the longer the vibration time is, the larger the displacement adjustment quantity is, the more uneven the concrete quality is, the moving path of the vibration rib is determined through the calculated fluctuation characteristic value, the construction efficiency and the vibration effect of different moving paths are different, the construction efficiency is improved through targeted path analysis, and the robustness of the strength of the prefabricated wall body is further improved.
With continued reference to fig. 4 in combination with fig. 5, fig. 5 is a schematic connection diagram of the vibration rib and the second auxiliary member according to an embodiment of the present invention, where a moving path of the vibration rib includes a first path 6, a second path and a third path 7.
The first path 6 is from the first path starting point to the first path ending point in a clockwise arc track, the second path is from the first path starting point to the first path ending point in a clockwise arc track, and then from the first path ending point to the first path starting point in a anticlockwise arc track, and the third path is from the third path starting point to the third path ending point in a zigzag track. The more uneven concrete is, the higher the vibration demand level is, but the construction efficiency is low due to the complex moving path, and different paths are selected for different fluctuation characteristic values, so that the robustness of the strength of the prefabricated wall body is further improved.
The movement of the vibrating bars can be controlled manually or mechanically, in practice, 3cm of deviation from the movement path is allowed, and the starting point, the end point and the movement direction of the movement are the same as those of the corresponding path. And the included angle between the vibrating rib and the gravity direction in the moving process is smaller than 5 degrees.
In the implementation, after the vibration ribs run on the corresponding paths, the vibration ribs return to the circle center 8 of the second auxiliary piece, and are bent until the exposed parts are completely contacted with the outer side plane of the second auxiliary piece after being screwed into the vibration grooves. Compared with the traditional vibration, the method does not need to pull out the vibration head, utilizes the vibration rib to replace the effect of the vibration head, directly fixedly connects the vibration rib with the heat insulation layer and the second auxiliary piece after the vibration is finished, avoids the influence of the process of taking out the vibration head on the concrete forming quality, and further improves the robustness of the strength of the prefabricated wall body. It will be appreciated that the application of vibration power to rigid members such as vibrating bars is prior art and will not be described in detail.
Specifically, in step S6, the fluctuation level determined from the fluctuation feature value includes:
the first fluctuation level satisfies that the fluctuation feature value is smaller than a first preset fluctuation feature value.
The second fluctuation level satisfies that the fluctuation feature value is greater than or equal to the first preset fluctuation feature value and less than the second preset fluctuation feature value.
The third fluctuation level satisfies that the fluctuation feature value is greater than the second preset fluctuation feature value.
In implementation, the first preset fluctuation feature value and the second preset fluctuation feature value can be determined according to limited experiments under actual working conditions, and preferably, the first preset fluctuation feature value is 0.5, and the second preset fluctuation feature value is 1.
The first path is selected for a first fluctuation level, the second path is selected for a second fluctuation level, and the third path is selected for a third fluctuation level.
Specifically, the elevation fluctuation amount Δh is the elevation distance between the highest position and the lowest position of the second auxiliary member in the process of vibrating the vibrating bar, and the vibration frequency is positively correlated with the elevation fluctuation amount.
It will be appreciated that the highest position vibration process is the position at which the highest point of the surface points of the second auxiliary member is located, and the lowest position is the same, and in practice, the highest position and the lowest position can be detected by attaching a displacement sensor to the outer surface of the second auxiliary member.
Optionally, the vibration frequency f= (1+Δh/H0) ×f0, where H0 is the second height and f0 is the standard vibration frequency.
In practice, the standard vibration frequency is determined from the mix ratio of the concrete and the technical document.
Specifically, the first height is determined according to the quality of the heat preservation layer, and the second height is determined according to the height of the steel reinforcement cage.
The first height is inversely related to the quality of the heat preservation layer, the second height meets the requirements that the concrete covers the steel reinforcement framework, and the second auxiliary piece is not contacted with the steel reinforcement framework and is not more than the target height after the second auxiliary piece is placed.
Preferably, the second height is such that after the second auxiliary member is placed, the distance between the second auxiliary member and the reinforcement cage is equal to the thickness of the second auxiliary member.
It should be understood that the greater the total mass of the insulating layer and the concrete poured in one vibration, the greater the difficulty in vibration, and the poor vibration kinetic energy transmission capability caused by the excessive thickness of the concrete, so the first height and the mass of the insulating layer should be negatively related, the numerical value of the first height is not specifically limited, only needs to satisfy that the numerical value is in negative relation with the mass of the insulating layer and less than 1/2 of the height of the mold, and is greater than 1/10 of the height of the mold, and the total mass of the mold, the insulating layer and the concrete is less than 2/3 of the load of the corresponding vibration table, and the specific numerical value needs to be set according to the vibration frequency, the vibration amplitude and the performance of the vibration table in practical working conditions and is not repeated herein.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The construction method of the energy-saving heat-preserving building wall structure is characterized by comprising the following steps of:
step S1, machining a connecting groove in the geometric center of the outer side of the heat preservation layer, and fixedly connecting a first auxiliary piece in the connecting groove;
step S2, placing the heat preservation layer in a corresponding mold, and arranging a reinforcement cage with a reserved vibration space;
s3, pouring concrete into the die to a first height and controlling the die to vibrate for one time;
step S4, judging whether secondary vibration is carried out or not and whether the position of the die is adjusted or not according to the detection parameters of the first auxiliary piece;
s5, pouring concrete to a second height, and paving a second auxiliary piece on the surface of the concrete;
step S6, inserting a vibration rib on the vibration track of the second auxiliary piece along the direction perpendicular to the heat insulation layer, vibrating the vibration rib while moving on the vibration track, calculating a fluctuation characteristic value according to the vibration duration of the secondary vibration in the step S4 and the adjustment amount of the mold position and the submergence depth of the second auxiliary piece in the step S5, and determining the moving path of the vibration rib according to the fluctuation characteristic value;
s7, screwing one end of the vibration rib into the connecting groove, bending the other end of the vibration rib to be in contact with the second auxiliary piece, pouring concrete to a target height, determining vibration frequency according to the elevation fluctuation amount of the second auxiliary piece in the moving process of the vibration rib, vibrating, and forming a wall body;
the inside of first auxiliary member is equipped with the detection pearl, the second auxiliary member is provided with vibrating rail's circular panel, detect the parameter including detect the pearl with the collision number of times of the inner wall of first auxiliary member and detect the pearl and be in the position of the bottom surface of first auxiliary member, vibrating space covers vibrating rail.
2. The construction method of the energy-saving and heat-insulating building wall structure according to claim 1, wherein the first auxiliary member is provided with a through hole in the center and has a circular truncated cone structure which is annularly hollow around the through hole, and the detection beads can freely move in the cavity of the first auxiliary member;
after the step S4 is completed, if the detection bead is located at the side of the first auxiliary member away from the through hole, it is determined that the one end of the mold in the direction of the detection bead is increased and adjusted until the detection bead is located at the side of the first auxiliary member close to the through hole.
3. The construction method of the energy-saving and heat-preserving building wall structure according to claim 2, wherein in the step S4, if the number of collisions of the detection beads is smaller than a preset number, determining to perform secondary vibration and determining a vibration duration of the secondary vibration according to the number of collisions;
wherein the vibration duration is inversely related to the number of collisions.
4. A construction method of an energy-saving and heat-preserving building wall structure according to claim 3, wherein in the step S6, the fluctuation feature value is positively correlated with the vibration duration, the adjustment amount, and the immersion depth.
5. The method of constructing a wall structure of a building for energy saving and heat preservation according to claim 4, wherein in the step S6, the moving path includes a first path, a second path, and a third path;
the first path is from a first path starting point to a first path ending point in a clockwise arc track, the second path is from the first path starting point to the first path ending point in a clockwise arc track, and then from the first path ending point to the first path starting point in a anticlockwise arc track, and the third path is from a third path starting point to a third path ending point in a zigzag track.
6. The method according to claim 5, wherein in step S6, a fluctuation level is determined according to the fluctuation feature value, and the corresponding movement path is determined according to the fluctuation level.
7. The method according to claim 6, wherein in the step S7, the elevation fluctuation amount is an elevation distance between a highest position and a lowest position of the second auxiliary member during the vibration of the vibration bar, and the vibration frequency is positively correlated to the elevation fluctuation amount.
8. The method of constructing a wall structure of a building for energy conservation and thermal insulation according to claim 1, wherein the first height is determined according to the mass of the thermal insulation layer, and the second height is determined according to the height of the reinforcement cage;
the first height and the quality of the heat preservation layer are in negative correlation, and the second height meets the condition that concrete covers the steel reinforcement framework and the second auxiliary piece is not contacted with the steel reinforcement framework after the second auxiliary piece is placed.
9. A building wall structure formed by the construction method of any one of claims 1 to 8, comprising a first auxiliary member, a second auxiliary member, a heat insulating layer, a concrete layer, and a vibration rib;
the heat insulation layer is arranged on the inner side of the prefabricated wall body, and a connecting groove matched with the first auxiliary piece and the vibration rib is formed in the geometric center of the outer side face of the heat insulation layer;
the first auxiliary piece is a hollow round platform with a round through hole in the center;
the second auxiliary piece is a round plate arranged in the concrete layer, and a special-shaped hole for providing a track for the movement of the vibration rib in the wall construction process is formed in the center of the round plate;
the vibration rib is an L-shaped steel bar with one threaded end, one threaded end of the vibration rib is in threaded connection with the connecting groove, the vibration rib sequentially penetrates through the circular through hole of the first auxiliary piece and the special-shaped hole of the second auxiliary piece from inside to outside, the bending position of the vibration rib is overlapped with the circle center position of the outer side of the second auxiliary piece, and the outer side part of the bending position of the vibration rib is fixedly connected with the outer side of the second auxiliary piece;
the concrete layer is arranged on the outer side of the heat preservation layer, a steel reinforcement framework is arranged inside the concrete layer, and the steel reinforcement framework is arranged between the heat preservation layer and the second auxiliary piece along the direction from inside to outside.
10. The building wall structure according to claim 9, wherein the larger diameter end face of the two end faces of the first auxiliary member faces the heat insulating layer, and the shaped hole is provided with four protrusions and one recess, each of which is used for restricting movement of the vibration bar and forming different tracks.
CN202410032830.6A 2024-01-10 2024-01-10 Energy-saving heat-preserving building wall structure and construction method thereof Active CN117536363B (en)

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CN115182591A (en) * 2022-06-25 2022-10-14 伟大集团建设股份有限公司 Concrete vibrating automatic floating robot
CN115637656A (en) * 2022-11-22 2023-01-24 江苏苏科建设项目管理有限公司 Bridge construction method
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