CN112627414A - Assembled engineering bamboo-lightweight concrete sandwich floor and construction method - Google Patents

Abstract

The invention provides an assembled engineering bamboo-lightweight concrete sandwich floor slab, which comprises a prefabricated sandwich floor slab single body, secondary beams, engineering bamboo connecting plates, thin-wall angle steel, plate nails and self-tapping screws. The prefabricated sandwich floor slab comprises a T-shaped light concrete slab, an upper surface engineering bamboo slab and a lower tensile engineering bamboo slab, wherein the upper surface engineering bamboo slab and the lower tensile engineering bamboo slab have the same width as a web plate of the T-shaped light concrete slab, the upper surface engineering bamboo slab and the lower tensile engineering bamboo slab are fixedly connected in a structural adhesive bonding mode, and the long edge direction of the upper surface engineering bamboo slab and the long edge direction of the lower tensile engineering bamboo slab are consistent with the grain direction of bamboo; the secondary beam is connected with the prefabricated sandwich floor single bodies on the two sides of the secondary beam through the engineering bamboo connecting plates and the plate nails nailed at intervals, and the secondary beam is connected with the prefabricated sandwich floor single bodies on the two sides of the secondary beam through thin-wall angle steel and self-tapping screws. The invention also provides a construction method of the floor slab.

Description

An Assemblable Engineering Bamboo-Lightweight Concrete Sandwich Floor Slab and Construction Method

technical field

The invention belongs to the technical field of building structure engineering, and particularly relates to an assembleable engineering bamboo-lightweight concrete sandwich floor structure and a construction method thereof.

Background technique

Global warming caused by the development of industrialization in the past 150 years has caused irreversible damage to ecosystems and the Earth's climate system. The construction industry is a key area of global carbon emission reduction, and its energy consumption accounts for 36% of global energy consumption, which has an important impact on the sustainable development of the world and the response to climate change. Therefore, low-carbon, green and ecological buildings have become the mainstream trend of building development.

Bamboo is a carbon negative material, which can absorb a large amount of CO ₂ during the growth process. At the same time, bamboo has a fast growth rate, a short maturity period and strong regeneration ability. As a building material, it can effectively reduce CO ₂ emissions. my country is rich in bamboo resources. There are about 39 genera and more than 500 species of bamboo, accounting for more than 30% of the world's bamboo species. The total bamboo forest area is about 6.01 million hectares, ranking first in the world. Therefore, bamboo structures have received more and more attention.

The invention patent with publication number CN 108360720A discloses a reticulated original bamboo skeleton-light aggregate concrete composite floor. The combined floor slab replaces steel bars with a meshed original bamboo skeleton, which improves the deficiencies of ordinary reinforced concrete floor slabs, but the binding process of the original bamboo skeleton is complicated and difficult to assemble.

The invention patent with the publication number of CN 108222348A discloses an original bamboo concrete composite floor slab and a pouring method thereof. The composite floor plate connects a plurality of bamboo stalks with a semicircular cross-section arranged side by side into a bamboo row, and vertically arranges and fixes a plurality of connecting steel bars above the bamboo stalks, and then pours concrete into the bamboo stalks. The composite floor fully utilizes the characteristics of the original bamboo in tension and concrete in compression, but the concrete needs to be poured on site, which may cause great environmental pollution.

The above-mentioned patents all use raw bamboo and concrete materials to form a composite floor, but raw bamboo is a natural biomass material, which has problems such as moth-eaten, mildew, and poor durability. At the same time, the use of cast-in-place concrete to make floor slabs is very likely to cause environmental pollution. Engineering bamboo is an engineering composite material that combines bamboo units and adhesives by certain physical and chemical means. It can effectively improve the properties of bamboo, and at the same time has standard specifications and excellent mechanical properties, which is convenient for the production of assembleable structural components. . Lightweight concrete slab is a mature industrialized product with stable structure, light weight and high strength, excellent sound insulation and fire resistance, mature technology, low cost and easy assembly. Combining engineered bamboo with lightweight concrete slabs may effectively solve the current problems of bamboo-concrete composite slabs.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose an assembleable engineering bamboo-lightweight concrete sandwich floor, and to provide its specific construction method. The new sandwich composite floor can give full play to the characteristics of engineering bamboo and lightweight concrete materials, and at the same time has low cost and is easy to assemble, and is a composite floor with integrated load-bearing and decoration. The technical scheme of the present invention is as follows:

An assemblable engineering bamboo-lightweight concrete sandwich floor slab comprises a single prefabricated sandwich floor slab, secondary beams, engineering bamboo connecting plates, thin-walled angle steel, plate nails and self-tapping screws. in,

The single prefabricated sandwich floor slab includes a T-shaped lightweight concrete slab, an upper cladding engineering bamboo slab and a lower tensile engineering bamboo slab with the same width as the T-shaped lightweight concrete slab web, and the three are fixedly connected by means of structural adhesive bonding. , the long-side direction of the upper cladding engineering bamboo board and the lower tensile engineering bamboo board is consistent with the bamboo grain direction;

The secondary beam and the prefabricated sandwich floor monomers on both sides are connected at the upper part by the engineering bamboo connecting plate and the board nails nailed at a certain interval. Tapping screws are used for connection; one limb of the thin-walled angle steel is coincident with the side of the secondary beam, and the other limb is coincident with the lower side of the single prefabricated sandwich floor.

Further, the material of the engineering bamboo connecting plate is consistent with the upper cladding engineering bamboo plate and the lower tensile engineering bamboo plate, the length and width of the engineering bamboo connecting plate are consistent with the length and width of the secondary beam, and the thickness of the engineering bamboo connecting plate is the same as The thickness of the upper cladding engineering bamboo board is the same. The leg length of the thin-walled angle steel is not greater than the distance from the lower side of the prefabricated sandwich floor monomer to the bottom of the secondary beam, and the length of the thin-walled angle steel is the same as the length of the secondary beam. The T-shaped lightweight concrete slab is made of autoclaved aerated concrete slab, foamed concrete slab or ceramsite concrete slab. The upper cladding engineering bamboo boards and the lower tensile engineering bamboo boards are made of laminated bamboo boards, glued bamboo boards or reconstituted bamboo boards.

The described construction method of lightweight concrete sandwich floor is characterized in that, comprises the following steps:

(1) Monolithic prefabricated sandwich floor slab: the long-side direction of the upper cladding engineering bamboo board and the lower tensile engineering bamboo board shall be consistent with the direction of the bamboo material along the grain. Apply epoxy resin structural adhesive on the flange surface and the lower surface of the web of the T-shaped lightweight concrete slab, and then align the short sides of the upper cladding engineering bamboo slab and the lower tensile engineering bamboo slab with the edge of the T-shaped lightweight concrete slab web Lay and compact, stand at room temperature until the structural adhesive reaches its strength, and form a single prefabricated sandwich floor;

(2) The prefabricated sandwich floor monomers are placed on both sides of the secondary beam in turn, and the engineering bamboo connecting plates are laid between the prefabricated sandwich floor monomers on both sides of the secondary beam, and the secondary beam and the prefabricated sandwich floor monomers on both sides pass through the upper part. The engineering bamboo connecting plate and the board nails nailed at certain intervals are connected; the length of the board nails is greater than the sum of the thickness of the flange of the T-shaped lightweight concrete slab and the thickness of the upper engineering bamboo board to ensure that the board nails can be driven into the secondary beam , so as to ensure the reliable connection between the secondary beam and the single prefabricated sandwich floor.

The beneficial effects that the present invention can achieve are:

1. The materials constituting the sandwich floor slab proposed by the present invention are all lightweight, green and environmentally friendly materials, which have good mechanical properties and can effectively reduce the weight of the structure. Combining the two materials gives full play to the advantages of the engineering bamboo, which is beautiful in appearance, good in tension, and lightweight in concrete with high compressive strength and good thermal insulation and sound insulation. At the same time, the cost and construction cost of the two materials are relatively low, which is conducive to popularization and use in village and town residences.

2. Setting the tensile engineering bamboo slab at the lower part of the lightweight concrete slab can give full play to the good tensile properties of the engineering bamboo, effectively improve the cracking problem of the lightweight concrete slab without setting steel bars, and improve the bearing capacity of the composite floor slab. The upper cladding engineering bamboo board is arranged on the upper part of the lightweight concrete board, so that the prefabricated sandwich floors can be connected by board nails. At the same time, the engineering bamboo board has good wear resistance and has the look and feel of an ecological material. After the construction is completed, it can be used directly as a floor, and no additional decorative treatment is required. The sandwich floor slab proposed by the present invention is a new type of composite floor slab with the effect of bearing and decoration integration.

3. The single sandwich floor slab proposed by the present invention can be prefabricated in the factory, and the specifications and quality can be well guaranteed. During on-site installation, it is only necessary to place the sandwich floor monomers on the secondary beams in turn, and make assembly connections by connecting engineering bamboo boards, thin-walled angle steel, plate nails and self-tapping screws. The construction and installation are simple and less difficult. The professional requirements of workers are low, and it is suitable for the construction of villages and towns.

Description of drawings

Fig. 1 is the schematic diagram of the engineering bamboo-lightweight concrete sandwich floor after installation;

FIG. 2 is a structural diagram of a prefabricated sandwich floor unit 1;

Figure 3 is the front view of the installed bamboo-lightweight concrete sandwich floor;

Figure 4 is a side view of the engineered bamboo-lightweight concrete sandwich floor slab after installation;

Fig. 5 is the top view of the engineering bamboo-lightweight concrete sandwich floor after installation;

FIG. 6 is an A-A sectional view corresponding to FIG. 5 .

FIG. 7 is a partial cross-sectional view of B corresponding to FIG. 6 .

Description of the numbers in the figure: 1- prefabricated sandwich floor single body, 11- upper cladding engineering bamboo board, 12- T-shaped lightweight concrete board, 13- lower tensile engineering bamboo board, 2- secondary beam, 3- engineering bamboo connection Plate, 4-thin-wall angle steel, 5-plate nail, 6-self-tapping screw.

Detailed ways

Below in conjunction with the accompanying drawings, the specific embodiments of the present invention will be further described:

Referring to Fig. 1, Fig. 3, Fig. 4 and Fig. 5, an assembleable engineering bamboo-lightweight concrete sandwich floor slab proposed by the present invention includes prefabricated sandwich floor slab monomers 1, secondary beams 2, engineering Bamboo connecting plate 3, thin-walled angle steel 4, plate nail 5, self-tapping screw 6. Structural adhesive is used in the factory to form a prefabricated sandwich floor unit 1, and the engineering bamboo connecting plate 3 is prefabricated in the factory according to the width of the secondary beam 2. The material of the engineering bamboo connecting plate 3 is the same as that of the upper cladding engineering bamboo board 11 and the lower tensile engineering The bamboo board 13 remains the same. The prefabricated sandwich floor unit 1 on both sides of the secondary beam 2 is connected by the engineering bamboo connecting plate 3 and the plate nail 5, and the secondary beam 2 and the prefabricated sandwich floor unit 1 on both sides of the secondary beam 2 are connected by thin-walled angle steel 4 and self-tapping screws 6 to connect.

Referring to FIG. 2 , the prefabricated sandwich floor unit 1 is composed of an upper cladding engineering bamboo board 11 , a T-shaped lightweight concrete board 12 , and a lower tensile engineering bamboo board 13 . The longitudinal direction of the upper cladding engineering bamboo board 11 and the lower tensile engineering bamboo board 13 is consistent with the direction of the bamboo material along the grain. Apply epoxy resin structural adhesive on the upper flange surface and the lower surface of the web of the T-shaped lightweight concrete slab 12, and then attach the upper cladding engineering bamboo slab 11 and the lower tensile engineering bamboo slab 13 to the short side of the T-shaped lightweight concrete slab web The edges of the slabs are aligned and compacted, and the slabs are allowed to stand at room temperature until the structural adhesive reaches its strength to form a single prefabricated sandwich floor slab 1 .

Referring to FIG. 3 , during on-site installation, the secondary beam 2 and the prefabricated sandwich floor unit 1 on both sides are connected at the upper part by the engineering bamboo connecting plate 3 and the board nails 5 nailed at certain intervals. The length and width of the engineering bamboo connecting plate 3 are consistent with the length and width of the secondary beam 2 , and the thickness of the engineering bamboo connecting plate 3 is the same as that of the upper cladding engineering bamboo plate 11 .

Referring to Figure 4, during on-site installation, the secondary beam 2 and the prefabricated sandwich floor unit 1 on both sides of the secondary beam 2 pass through the thin-walled angle steel 4 on the beam side and the self-tapping screws 6 screwed into the two limbs of the thin-walled angle steel 4 at regular intervals. to connect. One limb of the thin-walled angle steel 4 is coincident with the side of the secondary beam 2, and the other limb is coincident with the lower side of the single body 1 of the prefabricated sandwich floor. The leg length of the thin-walled angle steel 4 is not greater than the distance from the lower side of the prefabricated sandwich floor unit 1 to the bottom of the secondary beam 2 . The length of the thin-walled angle steel 4 is the same as that of the secondary beam 2 .

Referring to Figure 5, the prefabricated sandwich floor slabs 1 are placed in turn on both sides of the secondary beam 2, and the engineering bamboo connecting plate 3 is laid between the prefabricated sandwich floor slabs 1 on both sides, and the long side of the engineering bamboo connecting plate 3 is connected to the secondary beam. 2 The long sides are parallel, and then 2 rows of board nails 5 are driven in the direction of the long sides of the engineering bamboo connecting plate 3 at regular intervals.

Referring to Figure 6 and Figure 7, the prefabricated sandwich floor unit 1 laid in sequence along the long side of the secondary beam 2 is kept reliable with the secondary beam 2 through the engineering bamboo connecting plate 3 and the plate nail 5, the thin-walled angle steel 4 and the self-tapping screw 6. connect. The length of the board nails 5 is greater than the sum of the thickness of the flange of the T-shaped lightweight concrete slab 12 and the thickness of the upper cladding bamboo board 11, so as to ensure that the board nails 5 can be driven into the secondary beam 2, so as to ensure that the secondary beam 2 and the prefabricated sandwich floor slab are single. Reliable connection of body 1.

The construction method is as follows:

(1) Single prefabricated sandwich floor slab 1, according to the design drawings, cut the 15mm thick engineering bamboo board into a single piece of engineering bamboo board with a size of 600mm×1800mm as the upper cladding engineering bamboo board 1, cut the 25mm thick engineering bamboo board into A single engineering bamboo board with a size of 600mm×1800mm is used as the lower tensile engineering bamboo board 13. When cutting, ensure that the longitudinal direction of the upper cladding engineering bamboo board 11 and the lower tensile engineering bamboo board 13 is consistent with the grain direction of the engineering bamboo. Cut a 100mm thick lightweight concrete slab without reinforcement into a T-shaped slab 12 with a length of 600mm, the T-shaped upper flange size is 1800mm×25mm, and the web size is 1700mm×75mm. Apply epoxy resin structural adhesive on the upper flange surface and the lower surface of the web of the T-shaped lightweight concrete slab 12, and then attach the short sides of the upper cladding engineering bamboo slab 11 and the lower tensile engineering bamboo slab 13 to the T-shaped lightweight concrete slab The web edges are laid in alignment and compacted. Let stand at room temperature until the structural adhesive is completely solidified.

(2) Prefabricating the engineering bamboo connection board 3, cutting the 15mm thick engineering bamboo board into a single piece of engineering bamboo board with a size of 100mm×1800mm as the engineering bamboo connection board 3, and ensuring that the short side direction of the engineering bamboo connection board 3 is consistent with the bamboo material. The grain direction is the same.

(3) On-site installation method:

Step 1: Install the sandwich floor unit 1 along both sides of the secondary beam 2 in sequence.

Step 2: Lay the engineering bamboo connecting plate 3 on the connection of the sandwich floor unit 1 on the upper part of the secondary beam 2. The long side of the engineering bamboo connecting plate 3 is consistent with the length direction of the secondary beam 2. The plate nails 5 with a diameter of 3mm are inserted to fix the adjacent sandwich floor unit 1 and the secondary beam 2. The row spacing of the plate nails is 100mm and the column spacing is 50mm.

Step 3: Install the thin-walled angle steel 4 of equal limbs with a cross-sectional size of 25mm×3mm and a length of 1800mm at the position where the lower part of the sandwich floor unit 1 contacts the secondary beam 2. One leg of the thin-walled angle steel 4 is connected to the side of the secondary beam 2 Coincidence, the other limb is overlapped with the lower side of the prefabricated sandwich floor unit 1. Screw in the self-tapping screws 4 with a diameter of 3mm every 200mm on the overlapping surface of the thin-walled angle steel 4 and the secondary beam 2 and the overlapping surface of the thin-walled angle steel 4 and the sandwich floor unit 1, so that the sandwich floor unit 1 and The secondary beam 2 is connected reliably.

Step 4: After the installation is completed according to the above steps, the assembly construction of the bamboo-lightweight concrete sandwich floor is completed.

Claims (6)

1. An assemblable engineering bamboo-lightweight concrete sandwich floor, comprising a prefabricated sandwich floor monomer, secondary beams, engineering bamboo connecting plates, thin-walled angle steel, plate nails, and self-tapping screws. in, The single prefabricated sandwich floor slab includes a T-shaped lightweight concrete slab, an upper cladding engineering bamboo slab and a lower tensile engineering bamboo slab with the same width as the T-shaped lightweight concrete slab web, and the three are fixedly connected by means of structural adhesive bonding. , the long-side direction of the upper cladding engineering bamboo board and the lower tensile engineering bamboo board is consistent with the bamboo grain direction; The secondary beam and the prefabricated sandwich floor monomers on both sides are connected at the upper part by the engineering bamboo connecting plate and the board nails nailed at a certain interval. Tapping screws are used for connection; one limb of the thin-walled angle steel is coincident with the side of the secondary beam, and the other limb is coincident with the lower side of the single prefabricated sandwich floor. 2. light-weight concrete sandwich floor slab according to claim 1, is characterized in that, the material of engineering bamboo connecting plate is consistent with upper cladding engineering bamboo plate and lower tensile engineering bamboo plate, and the length and width of engineering bamboo connecting plate Consistent with the length and width of the secondary beam, the thickness of the engineered bamboo connection board is the same as the thickness of the overlying engineered bamboo board. 3. The lightweight concrete sandwich floor slab according to claim 1, wherein the length of the legs of the thin-walled angle steel is not greater than the distance from the lower side of the prefabricated sandwich floor slab monomer to the bottom of the secondary beam, and the length of the thin-walled angle steel is the same as the length of the secondary beam. The beams are the same length. 4. The lightweight concrete sandwich floor slab according to claim 1, wherein the T-shaped lightweight concrete slab is made of autoclaved aerated concrete slab, foamed concrete slab or ceramsite concrete slab. 5. The lightweight concrete sandwich floor slab according to claim 1, characterized in that, the materials of the upper cladding engineering bamboo board and the lower tensile engineering bamboo board are laminated bamboo boards, glued bamboo boards or reconstituted bamboo boards. 6. the construction method of the lightweight concrete sandwich floor slab described in any one of claim 1-3, is characterized in that, comprises the following steps: (1) Monolithic prefabricated sandwich floor slab: the long-side direction of the upper cladding engineering bamboo board and the lower tensile engineering bamboo board shall be consistent with the direction of the bamboo material along the grain. Apply epoxy resin structural adhesive on the flange surface and the lower surface of the web of the T-shaped lightweight concrete slab, and then align the short sides of the upper cladding engineering bamboo slab and the lower tensile engineering bamboo slab with the edge of the T-shaped lightweight concrete slab web Lay and compact, stand at room temperature until the structural adhesive reaches its strength, and form a single prefabricated sandwich floor; (2) The prefabricated sandwich floor monomers are placed on both sides of the secondary beam in turn, and the engineering bamboo connecting plates are laid between the prefabricated sandwich floor monomers on both sides of the secondary beam, and the secondary beam and the prefabricated sandwich floor monomers on both sides pass through the upper part. The engineering bamboo connecting plate and the board nails nailed at certain intervals are connected; the length of the board nails is greater than the sum of the thickness of the flange of the T-shaped lightweight concrete slab and the thickness of the upper engineering bamboo board to ensure that the board nails can be driven into the secondary beam , so as to ensure the reliable connection between the secondary beam and the single prefabricated sandwich floor.

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