CN108149834A - NCCLT sound insulating floor slabs - Google Patents

Abstract

The present invention provides a kind of NCCLT sound insulation floor, including NCCLT sound insulation floor with flat port, NCCLT sound insulation floor with single-end step opening, NCCLT sound insulation floor with double end step opening; NCCLT sound insulation floor with flat port is composed of a plurality of layers, each Each ply is composed of multiple pieces of standard wood, and all adjacent plies are perpendicular to each other along the grain; the top and bottom layers are continuous longitudinal plies, composed of continuously arranged longitudinal planks, and the gap between the two plies A number of longitudinal plank layers with internal cavity and transverse plank layers with internal cavity are set; the single-end step opening NCCLT sound insulation floor is provided with veneer connecting step openings at one end of the continuous longitudinal plank layers on the top and bottom floors respectively. The beneficial effects of the present invention are: factory prefabrication is fully realized, the durability is significantly improved, the ecological environment is not damaged, the finished product rate is greatly improved, the integration of sound insulation and heat insulation is realized, the internal holes are maximized, the rigidity and strength of the board are greatly improved, and the amount of materials is reduced. Superior force performance, and has unparalleled deformation recovery ability.

Description

NCCLT Acoustic Floor Slabs

technical field

The invention belongs to the technical field of buildings, in particular to an NCCLT soundproof floor.

Background technique

According to statistics, the construction industry consumes about 50% of the earth's energy, 42% of water resources, 50% of materials and 48% of arable land. Cause ecological imbalance, resulting in 24% of global air pollution, 50% of greenhouse effect, 40% of water pollution and 50% of chlorofluorocarbons. With the continuous development of modern wood structure technology and wood treatment technology, a series of problems such as fire prevention, moisture resistance, corrosion resistance, ant resistance, and sound insulation have been completely solved, so that wood can face any architectural challenges, and in terms of design life and service life, Wood frame houses are much longer than concrete frame houses. The continuous development of wood structure and its industrialization has enabled my country's construction industry to truly realize the whole process of green, recyclable and sustainable. Therefore, ancient and modern wooden structures are beginning to gradually return to the center stage of the construction industry. The main reason is that wooden structures have great advantages in sustainable development: ① Green: Every cubic meter of wood grown in a forest can absorb about 850 carbon dioxide Kilogram. The production of 1 cubic meter of steel emits about 12 tons of carbon dioxide, and 1 cubic meter of concrete emits about 3 tons of carbon dioxide. ②Health: The indoor air of wooden structures contains a large amount of phytoncide and negative ions called air vitamins, which are beneficial to people's physical and mental health. ③ Energy saving: The thermal insulation and energy saving performance of wooden structure houses is better than any other structural forms. The thermal insulation value of wood is 16 times higher than concrete, 400 times higher than steel, and 1600 times higher than aluminum. ④Environmental protection: Wood is a natural growth material, and the production of steel and cement causes air and water pollution. ⑤Seismic performance: wood structure has superior flexibility, good ductility and energy dissipation capacity. Even when strong earthquakes knock entire buildings off their foundations, their structures often remain intact. Wooden structures have high toughness, strong resistance to instantaneous impact loads and periodic fatigue damage, and have the best seismic resistance among all structures, which has been fully proved in many large earthquakes. ⑥Durability: Wood is a stable, long-lived and durable material. Many ancient wooden buildings in our country have experienced wind, frost, snow and rain for thousands of years, and they are still standing. A large number of wooden structure houses in foreign countries have been used for hundreds of years and still play a good use function. ⑦Fire resistance: The fire-resistant wood structure has a carbonization effect, and its low conductivity can effectively prevent the flame from spreading inward, thus ensuring that the entire wood structure will not be damaged for a long time. ⑧Flexible design and high utilization rate: Compared with steel structure, concrete structure and masonry structure, wood structure has the most diverse connection forms, the most flexible space layout and the highest utilization rate. ⑨Construction: The construction period of the wooden structure is the shortest, and it is not affected by the climate, and can be constructed at any time.

Wooden structure buildings not only have huge sustainable development advantages, but also have huge industrialization advantages: ① High assembly rate: it is difficult for concrete structures to exceed 80%, while wood structures can reach 100%. ② High rate of standardization and generalization: wood structure has a single material, and the degree of standardization and generalization is higher than that of concrete structure. ③ High level of automation in the workshop: The wood structure has strong machinability, and the automation rate of the workshop component production is much higher than that of the concrete structure. ④Low processing cost: wooden structural components do not need moulds, pouring and maintenance, and processing saves time, labor and money. ⑤ High processing precision: The process of processing wood structures is controlled by machine tools with high processing precision. ⑥ Low transportation cost: The wooden structure is not only light in weight, but also more regular in shape, without a large number of exposed steel bars. ⑦ Fast assembly speed: Assembling concrete structures still requires a lot of wet work, compared with that, the construction period of wooden structures can be shortened several times. ⑧Low requirements for workers: Concrete structure assembly requires a large number of high-quality professional teams, a large number of precise operations, grouting and cast-in-place. In particular, a large number of steel bars are connected, and the operation is difficult. And the installation operation of the wooden structure is significantly simplified. ⑨Assembly of major parts: Since the wooden structure is lighter and more regular, it can be assembled with major parts, and the degree of industrialization is higher.

Cross-laminated timber (CLT) is a new type of wood building material. It uses kiln-dried specification finger-jointed timber to be sorted and cut into wooden squares. The area and thickness can be customized according to requirements; its characteristic is that the standard wood with horizontal and vertical grains is glued together, and its strength can replace concrete materials. The relevant tests show that the wooden buildings made of this material have good seismic performance.

CLT has a strong load-bearing capacity in nature, and it can be used as an important load-bearing material in both vertical and horizontal combined applications. Theoretically, CLT can be used as a structural material for timber buildings up to 10 stories high, and as a substitute for cement or steel.

CLT is a heavy-duty wood structure. Large-area cross-laminated wood panels can be cut directly and used as exterior walls, floor slabs, and roof panels of buildings. They are suitable for buildings above the ground; because this technology has the advantages of efficient and high-speed construction, And it has low requirements on the weather, which can greatly improve the construction progress. CLT has inherently excellent fire resistance, which is similar to the characteristics of heavy wood structures: once a fire occurs, the surface layer of CLT wood materials will slowly carbonize at a certain rate and at the same time maintain the original internal structural strength for a long time. Therefore, this carbonization effect can further ensure the structural strength of the board. In areas with frequent earthquakes, the key consideration in the safety design process is the seismic capacity of the structural system. As a building material, CLT, together with other connectors and fasteners used in construction, ensures that the overall structure has strong earthquake resistance. The material is natural, green and environmentally friendly, and can greatly reduce greenhouse gas emissions throughout the life cycle; it has low requirements for construction conditions, fast construction and installation, and saves construction time, thereby reducing costs; compared with traditional building materials, the material is light and the requirements for the foundation are not high. It is beneficial to speed up the construction progress and reduce the cost; the wood structure building with cross-laminated wood has excellent fireproof and earthquake resistance performance.

However, CLT also has its own shortcomings: ①The stability period of the structural adhesive used is often only 50 years, and the stability period of some structural adhesives is less than 20 years, while the life span of wood structure buildings is often hundreds or even thousands of years. The stability of the glue seriously affects the durability of the structure. ② Extensive use of structural adhesives is not only harmful to health, but also causes certain damage to the environment. ③ When wood is glued, its surface needs to be as flat as a mirror, and the yield of wood is significantly reduced. ④Materials such as thermal insulation and sound insulation cannot be integrated, which increases on-site procedures, prolongs the construction period, and increases costs.

Contents of the invention

In order to improve the durability of CLT, nail connections are used instead of glue connections, chemical products are no longer used, the service life of CL is extended, and environmental pollution is avoided. Greatly improve the yield of the board, and adopt a large number of internal cavity design methods, not only integrate the technology of heat preservation and sound insulation, but also significantly improve the stiffness and mechanical performance of the same board, and have good recovery and deformation capabilities.

In order to achieve the above object, the technical scheme adopted in the present invention is:

NCCLT sound insulation floor, including flat port NCCLT sound insulation floor, single-end stepped NCCLT sound insulation floor, double-end stepped NCCLT sound insulation floor; the flat port NCCLT sound insulation floor is composed of multiple layers, each layer It is composed of multiple pieces of standard wood, and the woods along the grain of all adjacent layers are perpendicular to each other; the top layer and the bottom layer are continuous longitudinal layers, which are composed of longitudinal planks arranged continuously, and a number of internal belts are set between these two layers. cavity longitudinal plies and internal cavity transverse plies;

Two cavity longitudinal end plates (3) with cavity longitudinal wood layers inside are respectively located at both ends, a number of cavity longitudinal inner plates (4) are evenly distributed between the cavity longitudinal end plates (3), and all cavity longitudinal ends The plate (3) and the cavity longitudinal inner plate (4) are all parallel to each other; the distance between all the plates of the cavity longitudinal end plate (3) and the cavity longitudinal inner plate (4) is the width of 2-5 plates, and Filling transverse end plates (11) are respectively arranged at both ends, and are all aligned in rows, and several rows of filling transverse inner plates (10) are arranged between two rows of filling transverse end plates (11); the cavity longitudinal end plates The plate width of (3) is 1-2 times of the plate width of the longitudinal inner plate (4) of the cavity; the spacing of each row of the filling transverse end plate (11) and the filling transverse inner plate (10) is the spacing of 5-10 plates , forming a longitudinal cavity (14);

The two cavity transverse end plates (8) with the cavity transverse wood layer inside are located at both ends respectively, and several cavity transverse inner plates (9) are evenly distributed between the cavity transverse end plates (8), and all the cavity transverse end plates The plate (8) and the cavity transverse inner plate (9) are all parallel to each other; the spacing of all the plates of the cavity transverse end plate (8) and the cavity transverse inner plate (9) is the width of 3-8 plates, and in Filling longitudinal end plates (6) are respectively arranged at both ends, and are aligned in rows, and several rows of filling longitudinal inner plates (5) are arranged between two rows of filling longitudinal end plates (6); the filling longitudinal end plates ( 6) The plate width is 1-1.5 times of the plate width of the filling longitudinal inner plate (5); the spacing of each row of the filling longitudinal end plate (6) and the filling longitudinal inner plate (5) is the spacing of 5-10 plates, forming Transverse cavity (15);

Light and thin sound insulation cloth (12) is arranged between the two continuous longitudinal board layers of the top layer and the bottom layer and the adjacent internal transverse wood board layer with cavity, and light and thin sound insulation cloth (12) is selected between other layers; The cavity longitudinal inner panel (4), the filling longitudinal inner panel (5), the cavity transverse inner panel (9), the filling transverse inner panel (10), the longitudinal cavity (14), and the transverse cavity (15) are all up and down respectively Alignment; each layer of wood is connected by nails (13); at the center of the rectangle where the cavity longitudinal end plate (3) and the cavity transverse end plate (8) overlap, a hoisting and support hole (17) is provided;

The difference between the single-ended stepped NCCLT sound-insulated floor and the flat-ended NCCLT sound-insulated floor is that one end of the continuous longitudinal slab on the top floor and the bottom layer is respectively provided with a single-plate connecting stepped opening (16), and the single-plate connecting stepped opening (16) The thickness is the plate thickness, and the width is half of the typical longitudinal plank (1); when the width needs to be adjusted, the outermost typical longitudinal plank (1) is replaced by the longitudinal matching plate (2) at the connection port;

The difference between the NCCLT sound insulation floor with double-ended step opening and the NCCLT sound insulation floor with flat port is that the two ends of the continuous longitudinal slabs on the top and bottom floors are respectively provided with a single-board connection step opening (16), and the single-board connection step opening (16 ) is the thickness of the board, and the width is half of the typical longitudinal plank (1); when the width needs to be adjusted, the outermost typical longitudinal plank (1) is replaced by the joint longitudinal matching plate (2).

Further, the nailing position of the nails (13) is in the nailing unit (13-1) of each layer of horizontal and vertical timbers overlapping each other; according to the size of the overlapping area, 4, 8 or 9 nails can be selected for each unit. root nail (13);

4 nails: the nails (13) are all nailed on the outer ring nailing square (13-2) or the inner ring nailing square (13-3), the distance between the outer ring nailing square (13-2) and the horizontal and vertical wood The distance between the orthogonal overlapping nailing units (13-1) meets 1-3 times the minimum spacing specified in the code, and the distance between the outer ring nailing square (13-2) and the inner ring nailing square (13-3) meets the distance 1-2 times the minimum spacing stipulated in the specification; the distribution of nails in odd layers is as follows: two of the nails (13) are on the opposite corners of the nailing square (13-2) on the outer ring, and the other two nails (13) are on the inner ring. The nail square (13-3) intersects the outer ring nail square (13-2) on the opposite corner; the distribution of even-numbered layer nails is: the position corresponding to the odd-number layer nails (13) and the outer ring nail square (13-2 ) and the nailing square (13-3) in the inner ring are interchanged;

Shooting 8 nails: where 4 nails (13) are at the same position as only 4 nails (13) are nailed, the positions of the other 4 nails (13) are: the distribution of nails in odd layers is: two nails (13) are in The midpoint of the two opposite sides of the outer ring nailing square (13-2), the other two nails (13) cross the inner ring nailing square (13-3) and the outer ring nailing square (13-2) The midpoint of the two opposite sides; the distribution of even-numbered layer nails is as follows: the outer ring nailing square (13-2) and the inner ring nailing square (13-3) at the positions corresponding to the odd-numbered layer nails (13) are mutually Change position;

9 nails shot: 8 nails (13) are at the same position as only 8 nails (13) are nailed; the opposite side of the inner ring nailing square (13-3) or the outer ring nailing square (13-2) Midpoint connection lines form 4 quadrants, when the odd-numbered layers nail (13) is at the corner of the first quadrant, the even-numbered layers are the corners of the third quadrant; when the odd-numbered layers nail (13) is at the second quadrant corner, the even-numbered The layer is the corner of the fourth quadrant.

Compared with prior art, the beneficial effect of the present invention is:

The factory prefabrication is fully realized, the durability is significantly improved, the ecological environment is not damaged, the finished product rate is greatly improved, the integration of sound insulation and heat insulation is realized, the internal holes are maximized, the rigidity and strength of the board are greatly improved, the amount of materials is reduced, the superior mechanical performance, and Has unrivaled recovery from deformation. NCCLT has low cost of building houses, simple processing and convenient construction, which greatly improves installation efficiency and reduces construction costs.

Description of drawings

Figure 1 is a top view of the flat port NCCLT sound insulation floor.

Figure 2 is a top view and a longitudinal end side view of a flat port NCCLT sound insulation floor.

Fig. 3 is a top view and a transverse end side view of a flat port NCCLT sound insulation floor.

Fig. 4 is a schematic diagram of the longitudinal wood layer with cavity inside the NCCLT sound insulation floor slab with flat port.

Fig. 5 is a schematic diagram of the horizontal wood layer with cavity inside the NCCLT sound insulation floor with flat ports.

Fig. 6 is a longitudinal end side view of the top view of the NCCLT sound insulation floor with a single-ended step opening.

Fig. 7 is a longitudinal end side view of the top view of the NCCLT sound insulation floor with double-ended stepped openings.

Figure 8a is a layout diagram of square 4 nails intersected by odd-numbered horizontal and vertical planks.

Fig. 8b is a layout diagram of square 4 nails intersected by even-numbered horizontal and vertical planks.

Figure 9a is a layout diagram of square 8 nails intersected by odd-numbered horizontal and vertical planks.

Figure 9b is a layout diagram of square 8 nails intersected by even-numbered horizontal and vertical planks.

Figure 10a is a layout diagram of square 9 nails intersected by odd-numbered horizontal and vertical planks.

Figure 10b is a layout diagram of square 9 nails intersected by even-numbered horizontal and vertical planks.

In the figure: 1 is a typical longitudinal plank; 2 is the longitudinal matching plate of the connection; 3 is the longitudinal end plate of the cavity; 4 is the longitudinal inner plate of the cavity; 5 is the filling longitudinal inner plate; 6 is the filling longitudinal end plate; 8 is empty 9 is the transverse inner plate of the cavity; 10 is the transverse inner plate for filling; 11 is the transverse end plate for filling; 12 is light and thin sound insulation cloth; 13 is the nail; 14 is the longitudinal cavity; 15 is the transverse cavity; 16 is the step opening for veneer connection; 17 is the hoisting and support hole; 13-1 is the orthogonal overlapping nailing unit of horizontal and vertical wood; 13-2 is the nailing square of the outer ring; 13-3 is the nailing square of the inner ring.

Detailed ways

In order to further illustrate the present invention, the NCCLT sound insulation floor provided by the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, but they should not be understood as limiting the protection scope of the present invention.

Example

As shown in Figures 1 to 10, a NCCLT sound insulation floor mainly includes a flat port NCCLT sound insulation floor, a single-ended stepped NCCLT sound insulation floor, and a double-ended stepped NCCLT sound insulation floor; the flat port NCCLT sound insulation floor consists of multiple Consisting of three plies, each ply is composed of multiple pieces of standard wood, and the woods along the grain of all adjacent plies are perpendicular to each other; the top and bottom layers are continuous longitudinal plies, which are composed of continuously arranged longitudinal planks. A plurality of internal cavity longitudinal plank layers and internal cavity transverse plank layers are arranged between the two wooden layers;

Two cavity longitudinal end plates (3) with cavity longitudinal wood layers inside are respectively located at both ends, a number of cavity longitudinal inner plates (4) are evenly distributed between the cavity longitudinal end plates (3), and all cavity longitudinal ends The plates (3) and the longitudinal inner plates (4) of the cavity are all parallel to each other; the distance between all the plates of the longitudinal end plates (3) of the cavity and the longitudinal inner plates (4) of the cavity is the width of 2-5 plates, and Filling transverse end plates (11) are respectively arranged at both ends, and are all aligned in rows, and between two rows of filling transverse end plates (11), several rows of filling transverse inner plates (10) are arranged; the longitudinal ends of the cavity The plate width of the plate (3) is 1-2 times of the plate width of the longitudinal inner plate (4) of the cavity; spacing, forming a longitudinal cavity (14);

The two cavity transverse end plates (8) with the cavity transverse wood layer inside are located at both ends respectively, and several cavity transverse inner plates (9) are evenly distributed between the cavity transverse end plates (8), and all the cavity transverse end plates The plates (8) and the cavity transverse inner plates (9) are all parallel to each other; the distance between all the plates of the cavity transverse end plates (8) and the cavity transverse inner plates (9) is the width of 3-8 plates, and Filling longitudinal end plates (6) are respectively arranged at both ends, and are all aligned in rows, and between two rows of filling longitudinal end plates (6), several rows of filling longitudinal inner plates (5) are arranged; the filling longitudinal end plates The plate width of (6) is 1-1.5 times of the plate width of filling longitudinal inner plate (5); the spacing of each row of filling longitudinal end plate (6) and filling longitudinal inner plate (5) is the spacing of 5-10 plates, forming a transverse cavity (15);

Light and thin sound insulation cloth (12) is arranged between the two continuous longitudinal board layers of the top layer and the bottom layer and the adjacent internal transverse wood board layer with cavity, and light and thin sound insulation cloth (12) is selected between other layers; The cavity longitudinal inner panel (4), the filling longitudinal inner panel (5), the cavity transverse inner panel (9), the filling transverse inner panel (10), the longitudinal cavity (14), and the transverse cavity (15) are all up and down respectively Alignment; each layer of wood is connected by nails (13); at the center of the rectangle where the cavity longitudinal end plate (3) and the cavity transverse end plate (8) overlap, a hoisting and support hole (17) is provided;

The difference between the single-ended stepped NCCLT sound-insulated floor and the flat-ended NCCLT sound-insulated floor is that one end of the continuous longitudinal slab on the top floor and the bottom layer is respectively provided with a single-plate connecting stepped opening (16), and the single-plate connecting stepped opening (16) The thickness is the plate thickness, and the width is half of the typical longitudinal plank (1); when the width needs to be adjusted, the outermost typical longitudinal plank (1) is replaced by the longitudinal matching plate (2) at the connection port;

The difference between the NCCLT sound insulation floor with double-ended step opening and the NCCLT sound insulation floor with flat port is that the two ends of the continuous longitudinal slabs on the top and bottom floors are respectively provided with a single-board connection step opening (16), and the single-board connection step opening (16 ) is the thickness of the board, and the width is half of the typical longitudinal plank (1); when the width needs to be adjusted, the outermost typical longitudinal plank (1) is replaced by the joint longitudinal matching plate (2).

The nailing position of the nails (13) is in the nailing unit (13-1) of each layer of horizontal and vertical timbers overlapping each other; according to the size of the overlapping area, each unit can be selected to nail 4, 8 or 9 nails ( 13);

4 nails: the nails (13) are all nailed on the outer ring nailing square (13-2) or the inner ring nailing square (13-3), the distance between the outer ring nailing square (13-2) and the vertical wooden square The distance between overlapping nailing units (13-1) meets 1-3 times the minimum spacing specified in the code, and the distance between the outer ring nailing square (13-2) and the inner ring nailing square (13-3) is the distance that meets the code 1-2 times the specified minimum spacing; the distribution of odd-numbered layer nails is: two of the nails (13) are on the opposite corners of the nailing square (13-2) on the outer ring, and the other two nails (13) are nailing on the inner ring The square (13-3) intersects with the outer ring nailing square (13-2) on the opposite corner; the distribution of even-numbered layer nails is: the outer ring nailing square (13-2) at the position corresponding to the odd-numbered layer nails (13) The position is exchanged with the nailing square (13-3) in the inner ring;

Shooting 8 nails: where 4 nails (13) are at the same position as only 4 nails (13) are nailed, the positions of the other 4 nails (13) are: the distribution of nails in odd layers is: two nails (13) are in The midpoint of the two opposite sides of the outer ring nailing square (13-2), the other two nails (13) cross the inner ring nailing square (13-3) and the outer ring nailing square (13-2) The midpoint of the two opposite sides; the distribution of even-numbered layer nails is as follows: the outer ring nailing square (13-2) and the inner ring nailing square (13-3) at the positions corresponding to the odd-numbered layer nails (13) are mutually Change position;

9 nails shot: 8 nails (13) are at the same position as only 8 nails (13) are nailed; the opposite side of the inner ring nailing square (13-3) or the outer ring nailing square (13-2) Midpoint connection lines form 4 quadrants, when the odd-numbered layers nail (13) is at the corner of the first quadrant, the even-numbered layers are the corners of the third quadrant; when the odd-numbered layers nail (13) is at the second quadrant corner, the even-numbered The layer is the corner of the fourth quadrant.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (2)

1. NCCLT sound insulation floor, including flat port NCCLT sound insulation floor, single-end stepped NCCLT sound insulation floor, double-ended stepped NCCLT sound insulation floor; it is characterized in that: The flat port NCCLT sound insulation floor is composed of a plurality of slabs, and each slab is composed of multiple pieces of specification wood, and the woods along the grain of all adjacent slabs are perpendicular to each other; the top and bottom layers are continuous longitudinal slabs, It is composed of longitudinal planks arranged continuously, and a number of longitudinal plank layers with internal cavities and transverse plank layers with internal cavities are arranged between these two layers of wood; Two cavity longitudinal end plates (3) with cavity longitudinal wood layers inside are respectively located at both ends, a number of cavity longitudinal inner plates (4) are evenly distributed between the cavity longitudinal end plates (3), and all cavity longitudinal ends The plate (3) and the cavity longitudinal inner plate (4) are all parallel to each other; the distance between all the plates of the cavity longitudinal end plate (3) and the cavity longitudinal inner plate (4) is the width of 2-5 plates, and Filling transverse end plates (11) are respectively arranged at both ends, and are all aligned in rows, and several rows of filling transverse inner plates (10) are arranged between two rows of filling transverse end plates (11); the cavity longitudinal end plates The plate width of (3) is 1-2 times of the plate width of the longitudinal inner plate (4) of the cavity; the spacing of each row of the filling transverse end plate (11) and the filling transverse inner plate (10) is the spacing of 5-10 plates , forming a longitudinal cavity (14); The two cavity transverse end plates (8) with the cavity transverse wood layer inside are located at both ends respectively, and several cavity transverse inner plates (9) are evenly distributed between the cavity transverse end plates (8), and all the cavity transverse end plates The plate (8) and the cavity transverse inner plate (9) are all parallel to each other; the spacing of all the plates of the cavity transverse end plate (8) and the cavity transverse inner plate (9) is the width of 3-8 plates, and in Filling longitudinal end plates (6) are respectively arranged at both ends, and are aligned in rows, and several rows of filling longitudinal inner plates (5) are arranged between two rows of filling longitudinal end plates (6); the filling longitudinal end plates ( 6) The plate width is 1-1.5 times of the plate width of the filling longitudinal inner plate (5); the spacing of each row of the filling longitudinal end plate (6) and the filling longitudinal inner plate (5) is the spacing of 5-10 plates, forming Transverse cavity (15); Light and thin sound insulation cloth (12) is arranged between the two continuous longitudinal board layers of the top layer and the bottom layer and the adjacent internal transverse wood board layer with cavity, and light and thin sound insulation cloth (12) is selected between other layers; The cavity longitudinal inner panel (4), the filling longitudinal inner panel (5), the cavity transverse inner panel (9), the filling transverse inner panel (10), the longitudinal cavity (14), and the transverse cavity (15) are all up and down respectively Alignment; each layer of wood is connected by nails (13); at the center of the rectangle where the cavity longitudinal end plate (3) and the cavity transverse end plate (8) overlap, a hoisting and support hole (17) is provided; The difference between the single-ended stepped NCCLT sound-insulated floor and the flat-ended NCCLT sound-insulated floor is that one end of the continuous longitudinal slab on the top floor and the bottom layer is respectively provided with a single-plate connecting stepped opening (16), and the single-plate connecting stepped opening (16) The thickness is the plate thickness, and the width is half of the typical longitudinal plank (1); when the width needs to be adjusted, the outermost typical longitudinal plank (1) is replaced by the longitudinal matching plate (2) at the connection port; The difference between the NCCLT sound insulation floor with double-ended step opening and the NCCLT sound insulation floor with flat port is that the two ends of the continuous longitudinal slabs on the top and bottom floors are respectively provided with a single-board connection step opening (16), and the single-board connection step opening (16 ) is the thickness of the board, and the width is half of the typical longitudinal plank (1); when the width needs to be adjusted, the outermost typical longitudinal plank (1) is replaced by the joint longitudinal matching plate (2). 2. NCCLT soundproof floor slab according to claim 1, is characterized in that: the nail shooting position of described nail (13) is in the nailing unit (13-1) of each layer horizontal and vertical wood orthogonal overlap; According to overlapping area size 4, 8 or 9 nails per unit can be selected (13); 4 nails: the nails (13) are all nailed on the outer ring nailing square (13-2) or the inner ring nailing square (13-3), the distance between the outer ring nailing square (13-2) and the horizontal and vertical wood The distance between the orthogonal overlapping nailing units (13-1) meets 1-3 times the minimum spacing specified in the code, and the distance between the outer ring nailing square (13-2) and the inner ring nailing square (13-3) meets the distance 1-2 times the minimum spacing stipulated in the specification; the distribution of nails in odd layers is as follows: two of the nails (13) are on the opposite corners of the nailing square (13-2) on the outer ring, and the other two nails (13) are on the inner ring. The nail square (13-3) intersects the outer ring nail square (13-2) on the opposite corner; the distribution of even-numbered layer nails is: the position corresponding to the odd-number layer nails (13) and the outer ring nail square (13-2 ) and the nailing square (13-3) in the inner ring are interchanged; Shooting 8 nails: where 4 nails (13) are at the same position as only 4 nails (13) are nailed, the positions of the other 4 nails (13) are: the distribution of nails in odd layers is: two nails (13) are in The midpoint of the two opposite sides of the outer ring nailing square (13-2), the other two nails (13) cross the inner ring nailing square (13-3) and the outer ring nailing square (13-2) The midpoint of the two opposite sides; the distribution of even-numbered layer nails is as follows: the outer ring nailing square (13-2) and the inner ring nailing square (13-3) at the positions corresponding to the odd-numbered layer nails (13) are mutually Change position; 9 nails shot: 8 nails (13) are at the same position as only 8 nails (13) are nailed; the opposite side of the inner ring nailing square (13-3) or the outer ring nailing square (13-2) Midpoint connection lines form 4 quadrants, when the odd-numbered layers nail (13) is at the corner of the first quadrant, the even-numbered layers are the corners of the third quadrant; when the odd-numbered layers nail (13) is at the second quadrant corner, the even-numbered The layer is the corner of the fourth quadrant.