A bamboo-based foamed concrete insulated ring beam
By using bamboo fiber foamed concrete and composite bamboo reinforcement skeleton in the ring beam, combined with the design of EPS insulation board, the problems of heavy weight and poor thermal insulation of traditional ring beams are solved, achieving lightweight, high strength, and thermal insulation effects, and improving connection stability and durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- EAST CHINA UNIV OF TECH
- Filing Date
- 2025-07-14
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional reinforced concrete ring beams are heavy, have poor thermal insulation performance, and the reinforcing bars are prone to corrosion. Bamboo ring beams have insufficient structural strength and poor connection stability, making it difficult to meet the comprehensive performance requirements of ring beams in modern buildings.
Bamboo fiber foamed concrete is used as the core material, combined with longitudinal bamboo strips, transverse bamboo ribs and vertical steel bars to form a composite skeleton, and EPS insulation boards are set between the longitudinal bamboo strips. They are connected by steel nails and epoxy resin adhesive to form a high-strength, thermally insulated ring beam structure.
It achieves a lightweight, high-strength, and thermally insulated ring beam structure, reducing its self-weight, enhancing connection stability and durability, and meeting the mechanical performance and thermal insulation requirements of modern buildings.
Smart Images
Figure CN224431805U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building engineering technology, and in particular to a bamboo foamed concrete thermal insulation ring beam. Background Technology
[0002] Modern buildings have increasingly higher requirements for the performance of ring beams, which must not only ensure the safety and stability of the building structure, but also have excellent thermal insulation performance.
[0003] Traditional reinforced concrete ring beams have the following drawbacks: firstly, their heavy weight increases the building's self-weight; secondly, their poor thermal insulation performance leads to high building energy consumption; and thirdly, the reinforcing steel is prone to corrosion, affecting the ring beam's durability. Existing bamboo or foamed concrete ring beams suffer from insufficient structural strength, complex construction, and poor connection stability, making it difficult to meet the comprehensive requirements of modern buildings for ring beams in terms of both mechanical and thermal insulation performance.
[0004] Therefore, there is an urgent need to develop a bamboo-based foamed concrete insulated ring beam that is lightweight, has good thermal insulation properties, and high overall structural strength. Utility Model Content
[0005] The purpose of this utility model is to provide a bamboo-based foamed concrete insulated ring beam to solve the technical problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides a bamboo-based foamed concrete insulated ring beam, comprising foamed concrete and longitudinal bamboo slats disposed within the foamed concrete. The longitudinal bamboo slats are respectively disposed on the left and right sides of the ring beam. Several first transverse bamboo ribs and second transverse bamboo ribs are symmetrically disposed above and below the two rows of longitudinal bamboo slats, respectively. An EPS insulation board is disposed between the two rows of longitudinal bamboo slats, with the upper and lower ends of the EPS insulation board tightly attached to the bottom of the first transverse bamboo ribs and the top of the second transverse bamboo ribs, respectively.
[0007] Preferably, the EPS insulation board is provided in 2 or 3 columns, the thickness of each column of EPS insulation board is 20-40mm, and the column spacing between adjacent EPS insulation boards is 30-40mm.
[0008] Preferably, the dry density of the foamed concrete is not greater than 1500 kg / m³, the compressive strength is not less than 10 MPa, and the thermal conductivity is not greater than 0.41 W / (m·K). The foamed concrete contains uniformly distributed, non-directional bamboo fiber at a dosage of 1-2 kg / m³. 3 The bamboo fiber has a length of 10-15 mm and a diameter of 0.2-0.5 mm.
[0009] Preferably, the distance between the outermost edge of each of the two rows of longitudinal bamboo rafts and the edge of the ring beam is 20-30mm.
[0010] The distance between the outer edge of the first transverse bamboo strip and the upper edge of the ring beam, and the distance between the outer edge of the second transverse bamboo strip and the lower edge of the ring beam, are both 30-40mm. The distance between the outer edge of the first transverse bamboo strip and the left edge of the ring beam, and the distance between the outer edge of the second transverse bamboo strip and the right edge of the ring beam, are both 20-30mm.
[0011] Preferably, the longitudinal bamboo raft is composed of multiple longitudinal bamboo strips stacked vertically. Each longitudinal bamboo strip is made by dividing a bamboo tube with a diameter of 7-8cm and a wall thickness of 5-15mm into eight equal parts along its circumference. The cross-section of the longitudinal bamboo strip is fan-shaped, the central angle of the fan-shaped ring is 45°, and its tensile strength is not less than 100MPa.
[0012] Preferably, the longitudinal bamboo reinforcement includes a first longitudinal bamboo reinforcement, a second longitudinal bamboo reinforcement, a third longitudinal bamboo reinforcement and a fourth longitudinal bamboo reinforcement. The first longitudinal bamboo reinforcement and the second longitudinal bamboo reinforcement are stacked vertically above and below the third longitudinal bamboo reinforcement and the fourth longitudinal bamboo reinforcement, respectively, and are all connected by a first vertical steel bar. The spacing between adjacent first vertical steel bars is 100-200mm.
[0013] Preferably, the first longitudinal bamboo reinforcement and the second longitudinal bamboo reinforcement overlap each other at 1 / 3 of the length of each ring beam and are connected by a second vertical steel bar, steel nails and epoxy resin adhesive.
[0014] The first transverse bamboo rib and the second transverse bamboo rib are connected to the first longitudinal bamboo rib and the second longitudinal bamboo rib through the second vertical steel bar. The first vertical steel bar and the second vertical steel bar correspond one-to-one with the first transverse bamboo rib and the second transverse bamboo rib, and are arranged at intervals along the lap length direction. The spacing between adjacent second vertical steel bars is no more than 100mm.
[0015] The double rows of steel nails are staggered along the overlap length direction. Each steel nail is 30-35mm long and 5±0.2mm in diameter. The spacing between the double rows of steel nails is 10-14mm, and the spacing between adjacent steel nails in a single row is 23-27mm. The diameter of the nail head is 8±0.3mm.
[0016] Preferably, the diameter of the first vertical steel bar and the second vertical steel bar is not less than 8 mm, and the tensile strength is not less than 235 MPa;
[0017] The interfaces of the first and second transverse bamboo strips are both rectangular, with a thickness of 10-15mm, a width of 20-30mm, and a tensile strength of not less than 100MPa.
[0018] Preferably, the distance between the center of the first vertical steel bar at both ends of the lap section and the two ends of the lap section is not less than 50mm;
[0019] The distance between the center of the steel nail and the edge of the first vertical reinforcing bar is not less than 10 mm, and the distance between the center of the steel nail and the end of the lap section is not less than 15 mm.
[0020] Therefore, the bamboo-based foamed concrete insulated ring beam provided by this utility model has the following beneficial effects: This application uses bamboo fiber foamed concrete and replaces most of the steel bars with bamboo reinforcement, which reduces the self-weight of the ring beam while meeting the structural strength requirements. The longitudinal bamboo strips, transverse bamboo reinforcements and vertical steel bars form a supporting skeleton, ensuring the overall rigidity of the ring beam.
[0021] By setting two or three rows of EPS insulation boards in the middle of two rows of longitudinal bamboo rafts, with the top and bottom of the EPS insulation boards tightly attached to the first and second transverse bamboo ribs respectively, the thermal insulation performance of the ring beam is enhanced.
[0022] The longitudinal bamboo strips of the overlapping section are reinforced with a second vertical steel bar with a denser spacing and double rows of steel nails arranged alternately along the overlapping length to improve the connection strength. Epoxy resin is vacuum-injected into the EPDM sleeve to ensure seamless bonding between the vertical steel bar and the bamboo strip and to prevent loosening. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of a bamboo-based foamed concrete thermal insulation ring beam according to an embodiment of this utility model;
[0024] Figure 2 This is a schematic diagram of the internal structure of a bamboo-based foamed concrete thermal insulation ring beam according to an embodiment of this utility model;
[0025] Figure 3 This is a cross-sectional view of a bamboo-based foamed concrete insulated ring beam according to an embodiment of this utility model;
[0026] Figure 4 This is a schematic diagram of the longitudinal bamboo raft structure of the overlapping section in an embodiment of this utility model;
[0027] Figure Labels
[0028] 1. Foamed concrete; 2. Longitudinal bamboo raft; 21. First longitudinal bamboo reinforcement; 22. Second longitudinal bamboo reinforcement; 23. Third longitudinal bamboo reinforcement; 24. Fourth longitudinal bamboo reinforcement; 3. First transverse bamboo reinforcement; 4. Second transverse bamboo reinforcement; 5. EPS insulation board; 6. First vertical reinforcement; 7. Second vertical reinforcement; 8. Steel nails; 9. Ring beam. Detailed Implementation
[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.
[0030] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0031] Example
[0032] like Figure 1-4 As shown, this utility model discloses a bamboo-based foamed concrete insulated ring beam, comprising foamed concrete 1 and longitudinal bamboo slats 2 disposed inside the foamed concrete 1. The longitudinal bamboo slats 2 are respectively disposed on the left and right sides of the ring beam 9, and the distance between the outermost edge of each row of longitudinal bamboo slats 2 and the edge of the ring beam 9 is 20-30mm. Several first transverse bamboo ribs 3 and second transverse bamboo ribs 4 are symmetrically arranged above and below the two rows of longitudinal bamboo slats 2, respectively. Two rows of EPS insulation boards 5 are disposed between the two rows of longitudinal bamboo slats 2. The upper and lower ends of the EPS insulation boards 5 are respectively attached to the bottom of the first transverse bamboo ribs 3 and the top of the second transverse bamboo ribs 4. The thickness of each row of EPS insulation boards 5 is 20-40mm, and the spacing between adjacent rows of EPS insulation boards 5 is 30-40mm.
[0033] The dry density of foamed concrete 1 is not greater than 1500 kg / m3, the compressive strength is not less than 10 MPa, and the thermal conductivity is not greater than 0.41 W / (m·K). Foamed concrete 1 contains uniformly distributed, non-directional bamboo fiber at a dosage of 1-2 kg / m3. 3 The bamboo fiber has a length of 10-15mm and a diameter of 0.2-0.5mm. The surface of the bamboo fiber is chemically treated, giving it good compatibility with the foamed concrete matrix.
[0034] The distance between the outer edge of the first transverse bamboo rib 3 and the upper edge of the ring beam 9, and the distance between the outer edge of the second transverse bamboo rib 4 and the lower edge of the ring beam 9 are both 30-40mm. The distance between the outer edge of the first transverse bamboo rib 3 and the left edge of the ring beam 9, and the distance between the outer edge of the second transverse bamboo rib 4 and the right edge of the ring beam 9 are both 20-30mm.
[0035] The longitudinal bamboo raft 2 is composed of multiple longitudinal bamboo strips stacked vertically. Each longitudinal bamboo strip is made by dividing a bamboo tube with a diameter of 7-8cm and a wall thickness of 5-15mm into eight equal parts along its circumference. The cross-section of all longitudinal bamboo strips is fan-shaped, with a central angle of 45° and a tensile strength of not less than 100MPa.
[0036] The longitudinal bamboo reinforcement includes a first longitudinal bamboo reinforcement 21, a second longitudinal bamboo reinforcement 22, a third longitudinal bamboo reinforcement 23 and a fourth longitudinal bamboo reinforcement 24. The first longitudinal bamboo reinforcement 21 and the second longitudinal bamboo reinforcement 22 are stacked vertically above and below the third longitudinal bamboo reinforcement 23 and the fourth longitudinal bamboo reinforcement 24, respectively, and are all connected by a first vertical steel bar 6. The spacing between adjacent first vertical steel bars 6 is 100-200mm.
[0037] The first longitudinal bamboo reinforcement 21 and the second longitudinal bamboo reinforcement 22 overlap each other at 1 / 3 of each ring beam 9 and are connected by the second vertical reinforcement 7, steel nails 8 and epoxy resin adhesive. The first transverse bamboo reinforcement 3 and the second transverse bamboo reinforcement 4 are connected to the first longitudinal bamboo reinforcement 21 and the second longitudinal bamboo reinforcement 22 by the second vertical reinforcement 7. The first vertical reinforcement 6 and the second vertical reinforcement 7 correspond one-to-one with the first transverse bamboo reinforcement 3 and the second transverse bamboo reinforcement 4 and are arranged at intervals along the overlap length direction. The spacing between adjacent second vertical reinforcement 7 is no more than 100mm.
[0038] The double rows of steel nails 8 are staggered along the overlap length direction. Each steel nail 8 is 30-35mm long and 5±0.2mm in diameter. The spacing between the double rows of steel nails 8 is 10-14mm, and the spacing between adjacent steel nails 8 in a single row is 23-27mm. The diameter of the nail head of the steel nail 8 is 8±0.3mm.
[0039] The diameter of the first vertical steel bar 6 and the second vertical steel bar 7 is not less than 8mm, and the tensile strength is not less than 235MPa. The interface of the first transverse bamboo bar 3 and the second transverse bamboo bar 4 is rectangular, with a thickness of 10-15mm, a width of 20-30mm, and a tensile strength of not less than 100MPa.
[0040] The distance between the center of the first vertical reinforcing bar 6 at both ends of the lap section and the two ends of the lap section shall not be less than 50 mm, the distance between the center of the steel nail 8 and the edge of the first vertical reinforcing bar 6 shall not be less than 10 mm, and the distance between the center of the steel nail 8 and the end of the lap section shall not be less than 15 mm.
[0041] Therefore, this utility model adopts a bamboo foamed concrete insulated ring beam with the above-mentioned structure: a composite bamboo reinforcement skeleton is formed by longitudinal bamboo strips, transverse bamboo reinforcements and vertical steel bars, which reduces the self-weight of the ring beam while meeting the structural strength requirements. Multiple rows of EPS insulation boards are set between the two rows of longitudinal bamboo strips and combined with bamboo fiber foamed concrete to improve the thermal insulation performance of the ring beam. The composite connection of the longitudinal bamboo reinforcements in the overlapping section enhances the reliability and durability of the overlapping joint and solves the problem of insufficient stability of traditional bamboo connection.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.
Claims
1. A bamboo-based foamed concrete insulated ring beam, characterized in that: The structure includes foamed concrete and longitudinal bamboo rafts disposed inside the foamed concrete. The longitudinal bamboo rafts are respectively disposed on the left and right sides of the ring beam. Several first transverse bamboo ribs and second transverse bamboo ribs are symmetrically disposed above and below the two rows of longitudinal bamboo rafts. An EPS insulation board is disposed between the two rows of longitudinal bamboo rafts. The upper and lower ends of the EPS insulation board are respectively attached to the bottom of the first transverse bamboo ribs and the top of the second transverse bamboo ribs.
2. The bamboo-based foamed concrete insulated ring beam according to claim 1, characterized in that: The EPS insulation board is arranged in 2 or 3 columns, the thickness of each column of EPS insulation board is 20-40mm, and the column spacing between adjacent EPS insulation boards is 30-40mm.
3. The bamboo-based foamed concrete insulated ring beam according to claim 1, characterized in that: The foamed concrete has a dry density of no more than 1500 kg / m³, a compressive strength of no less than 10 MPa, and a thermal conductivity of no more than 0.41 W / (m·K). The foamed concrete contains uniformly distributed, non-directional bamboo fiber at a dosage of 1-2 kg / m³. 3 The bamboo fiber has a length of 10-15 mm and a diameter of 0.2-0.5 mm.
4. The bamboo-based foamed concrete insulated ring beam according to claim 1, characterized in that: The distance between the outermost edge of each of the two rows of longitudinal bamboo rafts and the edge of the ring beam is 20-30mm. The distance between the outer edge of the first transverse bamboo strip and the upper edge of the ring beam, and the distance between the outer edge of the second transverse bamboo strip and the lower edge of the ring beam, are both 30-40mm. The distance between the outer edge of the first transverse bamboo strip and the left edge of the ring beam, and the distance between the outer edge of the second transverse bamboo strip and the right edge of the ring beam, are both 20-30mm.
5. A bamboo-based foamed concrete thermal insulation ring beam according to claim 4, characterized in that: The longitudinal bamboo raft is composed of multiple longitudinal bamboo strips stacked vertically. Each longitudinal bamboo strip is made by dividing a bamboo tube with a diameter of 7-8cm and a wall thickness of 5-15mm into eight equal parts along its circumference. The cross-section of the longitudinal bamboo strip is fan-shaped, the central angle of the fan-shaped ring is 45°, and its tensile strength is not less than 100MPa.
6. A bamboo-based foamed concrete thermal insulation ring beam according to claim 5, characterized in that: The longitudinal bamboo reinforcement includes a first longitudinal bamboo reinforcement, a second longitudinal bamboo reinforcement, a third longitudinal bamboo reinforcement, and a fourth longitudinal bamboo reinforcement. The first longitudinal bamboo reinforcement and the second longitudinal bamboo reinforcement are stacked vertically above and below the third longitudinal bamboo reinforcement and the fourth longitudinal bamboo reinforcement, respectively, and are all connected by a first vertical steel bar. The spacing between adjacent first vertical steel bars is 100-200mm.
7. A bamboo-based foamed concrete thermal insulation ring beam according to claim 6, characterized in that: The first longitudinal bamboo reinforcement and the second longitudinal bamboo reinforcement overlap each other at 1 / 3 of each ring beam section and are connected by a second vertical steel bar, steel nails and epoxy resin adhesive. The first transverse bamboo rib and the second transverse bamboo rib are connected to the first longitudinal bamboo rib and the second longitudinal bamboo rib through the second vertical steel bar. The first vertical steel bar and the second vertical steel bar correspond one-to-one with the first transverse bamboo rib and the second transverse bamboo rib, and are arranged at intervals along the lap length direction. The spacing between adjacent second vertical steel bars is no more than 100mm. The double rows of steel nails are staggered along the overlap length direction. Each steel nail is 30-35mm long and 5±0.2mm in diameter. The spacing between the double rows of steel nails is 10-14mm, and the spacing between adjacent steel nails in a single row is 23-27mm. The diameter of the nail head is 8±0.3mm.
8. A bamboo-based foamed concrete thermal insulation ring beam according to claim 7, characterized in that: The diameter of the first vertical steel bar and the second vertical steel bar is not less than 8mm, and the tensile strength is not less than 235MPa; The interfaces of the first and second transverse bamboo strips are both rectangular, with a thickness of 10-15mm, a width of 20-30mm, and a tensile strength of not less than 100MPa.
9. A bamboo-based foamed concrete thermal insulation ring beam according to claim 8, characterized in that: The distance between the center of the first vertical reinforcement bar set at both ends of the lap section and the two ends of the lap section shall not be less than 50mm; The distance between the center of the steel nail and the edge of the first vertical reinforcing bar is not less than 10 mm, and the distance between the center of the steel nail and the end of the lap section is not less than 15 mm.