CN112482688A - Sound absorption and vibration reduction floating floor ground structure for theater and construction method thereof - Google Patents
Sound absorption and vibration reduction floating floor ground structure for theater and construction method thereof Download PDFInfo
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- CN112482688A CN112482688A CN202011394833.2A CN202011394833A CN112482688A CN 112482688 A CN112482688 A CN 112482688A CN 202011394833 A CN202011394833 A CN 202011394833A CN 112482688 A CN112482688 A CN 112482688A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/06—Flooring or floor layers composed of a number of similar elements of metal, whether or not in combination with other material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/182—Underlayers coated with adhesive or mortar to receive the flooring
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H3/00—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons
- E04H3/10—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons for meetings, entertainments, or sports
- E04H3/22—Theatres; Concert halls; Studios for broadcasting, cinematography, television or similar purposes
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
- E04F2290/02—Specially adapted covering, lining or flooring elements not otherwise provided for for accommodating service installations or utility lines, e.g. heating conduits, electrical lines, lighting devices or service outlets
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
- E04F2290/04—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
- E04F2290/04—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire
- E04F2290/041—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire against noise
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Abstract
The invention discloses a sound absorption and vibration reduction floating floor ground structure for a theater and a construction method thereof, the structure comprises a concrete bottom plate, a floating foundation structure, an equipment concrete vibration reduction foundation and hoop concrete, and the floating foundation structure comprises: the first waterproof layer is arranged on the top of the concrete bottom plate; the floating vibration isolation cushion layer is arranged on the top of the first waterproof layer; the second waterproof layer is arranged on the top of the floating vibration isolation cushion layer; the steel plate layer is arranged on the top of the second waterproof layer; the equipment concrete vibration damping foundation is poured and formed at the top of the steel plate layer, the hoop concrete is arranged on the peripheries of the floating foundation structure and the equipment concrete vibration damping foundation, the top of the hoop concrete is flush with the top of the equipment concrete vibration damping foundation, and the outer boundary of the floating foundation structure is arranged on the outer side of the equipment foundation. The invention solves the problem of vibration and sound transmission of the equipment foundation, and enables the theater to achieve the design and use effect.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a sound absorption and vibration reduction floating floor slab ground structure for a theater and a construction method thereof.
Background
With the continuous development of social economy, the cultural and mental demands of people are higher and higher, and large public buildings such as movie theater cultural entertainment grow up like bamboo shoots in spring all over the country. When the buildings are used for entertainment and cultural activities, the short-term large flow of people is usually considered, and more large-scale mechanical equipment must be configured to meet the requirements of fire protection, smoke exhaust, ventilation and the like. These mechanical devices often generate large vibration and noise during operation, which can seriously affect the use effect of the architecture of the theatre.
Aiming at the problems, in the prior art, facing sound-absorbing materials such as a channel wood sound-absorbing board, an FC perforated sound-absorbing board, a mineral wool board and the like are adopted, non-woven fabrics are pasted in the facing sound-absorbing materials, and sound-absorbing glass wool is embedded in a cavity of a light steel keel, so that the method can meet the sound-absorbing and noise-reducing requirements of theater buildings through acoustic rechecking. However, for the noise problem of the ground, especially for the sound absorption and vibration reduction problem of large equipment rooms, a perfect solution is not available at present.
At present, to the sound absorption and vibration reduction problems of large equipment, rubber vibration isolation cushion blocks can be lined below supporting legs and on an equipment foundation during equipment installation so as to reduce vibration caused by equipment operation. The method can be used as a first defense line for reducing the adverse effect of the vibration noise of the equipment, can meet the requirements of common buildings, but can not meet the requirements of movie theatre buildings, and can also transmit larger vibration noise to audience areas, thereby affecting the performance effect.
Chinese patent CN109281432A discloses a prefabricated bottom plate of a well-shaped grid and an air bag template structure, wherein the air bag template is a hollow structure, rectangular or square convex air bags are arranged on the outer surface of the air bag template in parallel, a vertical steel plate I, a vertical steel plate II, a transverse steel plate I, a transverse steel plate II, a transverse steel plate III and a transverse steel plate IV are arranged on the inner surface of the air bag template, the air bag template is connected with the vertical steel plate and the transverse steel plate by rivets, and an air valve is arranged at the end part of the air bag template; in each row of transversely parallel convex air bags, the inner surfaces of two adjacent rows of convex air bags are respectively provided with a transverse steel plate I and a transverse steel plate II, each transverse steel plate I is respectively and vertically provided with a vertical steel plate I along two transverse side surfaces, and each transverse steel plate II is respectively and vertically provided with a vertical steel plate II along two longitudinal side surfaces; a transverse steel plate IV is arranged on the inner surface of the top of the air bag template between each row of the convex air bags which are transversely parallel; a transverse steel plate III is arranged on the inner surface of the top of the air bag template between each row of the raised air bags which are longitudinally parallel; an end steel baffle and a lateral steel baffle are respectively arranged on the periphery of the air bag template, sawteeth of the end steel baffle and the lateral steel baffle correspond to the protruding air bag and are inserted and assembled, bolt holes arranged on the end steel baffle are aligned with bolt holes arranged on the upper portion of the lateral steel baffle, and the end steel baffle and the lateral steel baffle are connected and fixed through bolt rods to form a closed template; the longitudinal stress steel bars and the transverse stress steel bars are welded into a steel bar mesh, concrete cushion blocks are placed on the protruding air bags of the air bag template and are arranged in a V shape, the steel bar mesh is placed on the cushion blocks in the closed template, and concrete is poured in the closed template to form the prefabricated bottom plate with the well-shaped grids. This take well word check precast concrete bottom plate can better satisfy the two-way atress of precast bottom plate, but inhales the sound damping effect relatively poor.
Chinese patent CN110453884A discloses a construction method of a full floating construction vibration reduction sound insulation floor, which comprises the following steps: building a surrounding edge structure to form a floating area to be built; an elastic isolation layer is arranged on the inner side surface of the surrounding edge structure; arranging an elastic layer in the region to be built; pouring a floating layer on the elastic layer; and filling a sealant between the floating building layer and the surrounding edge structure, wherein the sealant is arranged on the elastic isolation layer. The elastic layer of the vibration-damping sound-insulation floor comprises a plurality of vibration-damping cushions, a plurality of vibration-damping springs and a plurality of sound-insulation glass wool, wherein the vibration-damping cushions are evenly laid on a floor in a floating area to be built at intervals, the inner diameters of the vibration-damping springs are larger than the outer diameters of the vibration-damping cushions, the vibration-damping springs are sleeved on the vibration-damping cushions, and the sound-insulation glass wool is filled between every two adjacent vibration-damping springs. Firstly, the enclosure structure of the invention is a masonry surrounding edge structure, and is not directly connected with the ground, because the brick-concrete anti-seismic performance is very poor, if the equipment vibrates greatly or under the condition of large-scale equipment or long-time work, the equipment is easy to crack, and potential safety hazards exist. Secondly, the elastic isolation layer is glued on the surrounding edge structure (masonry) through glue, and the double faced adhesive tape is difficult to be glued with the masonry, so that the elastic isolation layer is easy to fall off when concrete is poured. In addition, the waterproof part of the invention is upwards returned to the upper opening of the concrete, the waterproof part is tightly attached to the steel plate, no allowance is left, and when the concrete is poured, the steel plate can incline when the concrete is poured because the lower part of the steel bar is made of glass wool, so that the waterproof part on the other side is broken, and the hidden trouble of the waterproof part is caused.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a sound absorption and vibration reduction floating floor slab ground structure for a theater and a construction method thereof, and aims to solve the problems in the background art.
In order to achieve the above object, the present invention provides a sound absorption and vibration reduction floating floor ground structure for a theater, which comprises a concrete bottom plate, a floating foundation structure, an equipment concrete vibration reduction foundation and hoop concrete, wherein the floating foundation structure comprises: the first waterproof layer is arranged on the top of the concrete bottom plate; the floating vibration isolation cushion layer is arranged on the top of the first waterproof layer; the second waterproof layer is arranged on the top of the floating vibration isolation cushion layer; the steel plate layer is arranged on the top of the second waterproof layer; the device concrete vibration damping foundation is cast and molded at the top of the steel plate layer, the hoop concrete is arranged at the peripheries of the floating foundation structure and the device concrete vibration damping foundation, the top of the hoop concrete is flush with the top of the device concrete vibration damping foundation, and the outer boundary of the floating foundation structure is arranged at the outer side of the device foundation; and wherein, the floating vibration isolation cushion layer comprises a plurality of rubber cushion blocks which are horizontally laid and distributed in a matrix shape and are arranged inside the sound absorption glass wool.
In a preferred embodiment, a ready-mixed mortar leveling layer is arranged at the top of the concrete bottom plate, the outer boundary of the floating foundation structure is expanded by at least 150mm, the inner wall of the hoop concrete is respectively attached to the outer walls of the floating foundation structure and the equipment concrete vibration damping foundation, the hoop concrete is a reinforced concrete structure, and a plurality of reinforcing steel bars fixedly connected with the concrete bottom plate are arranged in the hoop concrete.
In a preferred embodiment, the cross section of the sound-absorbing glass wool is square, a plurality of vertical through holes distributed in a matrix shape are formed in the sound-absorbing glass wool to accommodate the rubber cushion block, the bottom of the rubber cushion block is pasted with a double faced adhesive tape, the thickness of the sound-absorbing glass wool is consistent with the height of the rubber cushion block, the distance between every two adjacent vertical through holes which are transversely and longitudinally arranged is equal, and the distance is less than or equal to 300 mm.
In a preferred embodiment, the vertical through hole is of a cubic structure, and the rubber cushion block is of a cubic structure, and the size of the rubber cushion block is consistent with that of the vertical through hole, so that the outer wall of the rubber cushion block is tightly attached to the inner wall of the vertical through hole.
In a preferred embodiment, the first waterproof layer and the second waterproof layer are both PE films, the thicknesses of the first waterproof layer and the second waterproof layer are the same, and the cross-sectional areas of the ready-mixed mortar leveling layer, the first waterproof layer, the floating vibration isolation cushion layer, the second waterproof layer and the steel plate layer are all equal.
In a preferred embodiment, the thicknesses of the first waterproof layer and the second waterproof layer are both 1mm, the thickness of the floating vibration isolation cushion layer is 50mm, the thickness of the steel plate layer is 2mm, and the thickness of the ready-mixed mortar leveling layer is 20 mm.
In a preferred embodiment, the steel bars in the hoop concrete comprise a plurality of longitudinal steel bars, an upper reinforcing bar and a hoop, two longitudinal steel bars are arranged on each side face, the longitudinal steel bars are three-stage steel bars with the diameter of 12mm, and the upper reinforcing bar is two three-stage steel bars with the diameter of 10 mm.
The invention also provides a construction method of the sound absorption and vibration reduction floating floor slab ground structure for the theater, which comprises the following steps: measuring the flatness of the concrete bottom plate; laying a first waterproof layer above the concrete bottom plate; arranging a floating vibration isolation cushion layer on the top of the first waterproof layer, wherein sound-absorbing glass wool is laid on the top of the first waterproof layer, the center point of a rubber cushion block is released on the sound-absorbing glass wool, a plurality of vertical through holes are formed in the sound-absorbing glass wool, the rubber cushion block is placed in the vertical through holes, and the vertical through holes are distributed in a matrix shape; laying a second waterproof layer on the top of the floating vibration isolation cushion layer; paving a steel plate layer on the top of the second waterproof layer; pouring a device concrete vibration damping foundation above the steel plate layer; and constructing hoop concrete, wherein the hoop concrete is arranged at the periphery of the floating foundation structure and the equipment concrete vibration damping foundation, and the top of the hoop concrete is flush with the top of the equipment concrete vibration damping foundation.
In a preferred embodiment, the construction method further comprises the steps of: if the flatness of the concrete bottom plate does not meet the requirement, arranging a ready-mixed mortar leveling layer on the measured concrete bottom plate so as to enable the flatness deviation after leveling to be within the range of 2 mm; the method comprises the steps of erecting a formwork before pouring of the equipment foundation concrete, and dismantling the formwork after pouring of the equipment foundation concrete and before construction of the hoop concrete, wherein the formwork is erected outside a pouring area by adopting bamboo rubber plates with the thickness of 12mm, and the bamboo rubber plates on two sides are erected with flitch keels and reinforced by adopting an external-bracing internal-pulling mode.
In a preferred embodiment, the construction of the hoop concrete comprises the following steps: erecting a template at the periphery of a floating foundation structure and an equipment concrete vibration damping foundation; implanting a plurality of vertically arranged longitudinal steel bars into a concrete bottom plate at the inner side of the template, wherein each side surface is provided with two longitudinal steel bars, and the top of each longitudinal steel bar is provided with an upper reinforcing bar; and pouring concrete to form the hoop concrete structure.
Compared with the prior art, the sound absorption and vibration reduction floating floor slab ground structure for the theater and the construction method thereof have the beneficial effects that: the floating vibration isolation cushion layer solves the problem of vibration and sound transmission of the equipment foundation in a mode of combining the rubber cushion block and the sound-absorbing glass wool, so that the theater can achieve the design and use effect. The peripheral hoop concrete adopts a reinforced concrete structure, is connected with the ground in a bar planting mode, and is bound with steel bars inside, so that the overall safety and vibration resistance are obviously improved.
Drawings
Fig. 1 is an elevation sectional view of a sound absorbing and vibration damping floating floor structure for a theater according to a preferred embodiment of the present invention.
Fig. 2 is a perspective view of a floating foundation structure and a hoop concrete according to a preferred embodiment of the present invention.
Fig. 3 is a bottom view of the floating foundation structure according to the preferred embodiment of the present invention.
Fig. 4 is a schematic perspective view of concrete for hoop reinforcement according to a preferred embodiment of the present invention.
Fig. 5 is a perspective view illustrating a floating vibration isolation mat according to a preferred embodiment of the present invention.
Fig. 6 is a flow chart illustrating a construction method of a sound-absorbing and vibration-damping floating floor structure for a theater according to a preferred embodiment of the present invention.
Description of reference numerals:
1-concrete bottom plate, 2-floating foundation structure, 21-first waterproof layer, 22-floating vibration isolation cushion layer, 23-second waterproof layer, 24-steel plate layer, 221-sound absorption glass wool, 222-rubber cushion block, 3-equipment concrete vibration reduction foundation, 4-hoop concrete, 5-equipment foundation and 6-ready mixed mortar leveling layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. The embodiments of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without any inventive work, belong to the scope of protection of the present invention.
Example 1:
as shown in fig. 1 to 5, the sound-absorbing and vibration-damping floating floor ground structure for theaters according to the preferred embodiment of the present invention includes a concrete floor 1, a floating foundation structure 2, an equipment concrete vibration-damping foundation 3, and a hoop concrete 4. The floating foundation structure 2 comprises a first waterproof layer 21, a floating vibration isolation cushion layer 22, a second waterproof layer 23 and a steel plate layer 24. The first waterproof layer 21 sets up at the top of concrete floor 1, floats and builds vibration isolation bed course 22 and sets up at the top of first waterproof layer 21, and second waterproof layer 23 sets up at the top of floating vibration isolation bed course 22, and steel deck 24 sets up at the top of second waterproof layer 23. Wherein, equipment concrete damping basis 3 pours the shaping at the top of steel deck 24, and cuff concrete 4 sets up in the periphery of floating building foundation 2 and equipment concrete damping basis 3, and the top of cuff concrete 4 is leveled mutually with the top of equipment concrete damping basis 3, and floats the outer boundary setting of building foundation 2 in the outside of equipment basis 5. The floating vibration isolation pad 22 includes a sound-absorbing glass wool 221 laid horizontally and a plurality of rubber pads 222 disposed inside the sound-absorbing glass wool 221 and distributed in a matrix.
Example 2:
in a preferred embodiment, as shown in fig. 1, when the flatness of the original structure surface does not meet the requirement, the influence on the damping effect is large, and the ground leveling needs to be performed first. A ready-mixed mortar leveling layer 6 is arranged on the top of the concrete bottom plate 1, and the outward expansion range W1 of the floating foundation structure 2 for the equipment foundation 5 is at least 150 mm. And the inner wall of the hoop concrete 4 is respectively attached to the outer walls of the floating building foundation structure 2 and the equipment concrete vibration damping foundation 3. The hoop concrete 4 is of a reinforced concrete structure, and a plurality of steel bars fixedly connected with the concrete bottom plate 1 are arranged in the hoop concrete 4, so that the integral vibration resistance and safety are enhanced.
Further, the cross section of the sound absorption glass wool 221 is square, a plurality of vertical through holes distributed in a matrix shape are formed in the sound absorption glass wool 221 to accommodate the rubber cushion block 222, and a double-faced adhesive tape is pasted at the bottom of the rubber cushion block 222 to prevent the rubber cushion block 222 from shaking and shifting before concrete is not poured. The thickness of the sound-absorbing glass wool 221 is consistent with the height of the rubber cushion block 222, the distance between two adjacent vertical through holes which are respectively arranged along the transverse direction and the longitudinal direction is equal, and the distance W2 is not more than 300 mm.
Further preferably, the cube structure of vertical through-hole, and rubber cushion 222 is the cube structure, and the size of rubber cushion 222 is unanimous with the size of vertical through-hole to make the outer wall of rubber cushion 222 closely laminate with the inner wall of vertical through-hole.
Further, first waterproof layer 21 and second waterproof layer 23 are the PE membrane, and the PE membrane can block the moisture and get into, inhales the cotton influence sound effect of inhaling such as soaking that wets of sound glass. The thicknesses of the first waterproof layer 21 and the second waterproof layer 23 are the same, and the cross sections of the ready-mixed mortar leveling layer 6, the first waterproof layer 21, the floating vibration isolation cushion layer 22, the second waterproof layer 23 and the steel plate layer 24 are all square and equal.
Furthermore, the steel bars in the hoop concrete 4 comprise a plurality of longitudinal steel bars, upper reinforcing bars and hoop bars, two longitudinal steel bars are arranged on each side face, the longitudinal steel bars are three-level steel bars with the diameter of 12mm, and the upper reinforcing bars are two three-level steel bars with the diameter of 10 mm.
Example 3:
in a preferred embodiment, the thickness of the first waterproof layer 21 and the second waterproof layer 23 is 1mm, and the thickness of the steel deck 24 is 2 mm. The ready-mixed mortar leveling layer 6 is made of C30 fine-stone concrete, and the thickness of the ready-mixed mortar leveling layer is 20 mm. The thickness of the floating vibration isolation cushion layer 22 is 50mm, wherein the thickness of the sound absorption glass wool 221 is 50mm, the length of 24kg/m is determined, and the size of the rubber cushion block 222 is 50mmX50 mm. The distance between two adjacent vertical through holes respectively arranged in the transverse direction and the longitudinal direction is 300 mm. The cross sectional areas of the ready-mixed mortar leveling layer 6, the first waterproof layer 21, the floating vibration isolation cushion layer 22, the second waterproof layer 23 and the steel plate layer 24 are all 11m2。
Example 4:
as shown in fig. 6, the invention also provides a construction method of the sound-absorbing vibration-damping floating floor slab ground structure for the theater, which comprises the following steps:
step 601: and (3) measuring the flatness of the concrete bottom plate (floor and roof plate), and if the flatness of the original structure surface meets the requirement, directly performing the step 602.
Step 602: and laying a first waterproof layer above the concrete bottom plate.
Step 603: and a floating vibration isolation cushion layer is arranged on the top of the first waterproof layer. Peripheral concrete cuff is not considered in the equipment foundation, tailor according to inside core size and inhale sound glass cotton, then lay at the top of first waterproof layer and tailor good sound glass cotton of inhaling, emit rubber cushion central point position on inhaling sound glass cotton, and a plurality of vertical through-holes have been seted up, lay rubber cushion in vertical through-hole, it is the same with inhaling sound glass cotton thickness to make rubber cushion thickness, upper portion and the cotton parallel and level of sound glass of inhaling, rubber cushion's interaxial distance is 300mm, the double faced adhesive tape is pasted in the rubber cushion lower part, in order to prevent that the cushion from rocking the aversion before not pouring the concrete, and, vertical through-hole is the matrix form and distributes.
Step 604: a second waterproof layer is laid on the top of the floating vibration isolation cushion layer, and the upper waterproof layer and the lower waterproof layer can respectively prevent moisture of concrete on the ground and the upper portion from entering the sound absorption glass wool. Preferably, the first waterproof layer and the second waterproof layer are both PE films.
Step 605: and laying a steel plate layer on the top of the second waterproof layer. The steel plate is an integral welding-free steel plate, and when the steel plate is laid, the damage to the waterproof layer and the disturbance to the rubber cushion block are avoided as much as possible. If damage to the previous finished product is found, immediate repair is required.
Step 606: and pouring a concrete vibration reduction foundation of the equipment above the steel plate layer. The equipment foundation concrete is commercial concrete, and when the concrete is poured, the concrete is poured from the middle part of the steel plate, and the pouring is strictly forbidden at the edge of the inner side of the template, so that the phenomenon that one side of the steel plate is pressed down and the other side of the steel plate is tilted up to cause irreparable damage to the waterproof layer and the rubber cushion block is avoided. The vibration is not possible at the edge, and the vibration is performed in the same way.
Step 607: and constructing the hoop concrete. The hoop concrete is arranged on the periphery of the floating building foundation structure and the equipment concrete vibration damping foundation, and the top of the hoop concrete is flush with the top of the equipment concrete vibration damping foundation. The top of the hoop concrete is flush with the top of the equipment concrete vibration damping foundation, and necessary steel bars are arranged in the hoop concrete to resist the lateral thrust of the floating foundation and prevent the direction-finding instability of the floating foundation.
Example 5:
in a preferred embodiment, the construction method further comprises the steps of: if the flatness of the concrete bottom plate (floor and roof panel) does not meet the requirement, a pre-mixed mortar leveling layer is arranged on the measured concrete bottom plate, so that the flatness deviation after leveling is within the range of 2 mm. The specific method comprises the following steps: and (3) leveling the original structure ground by using bagged dry-mixed DS-M20 ground mortar, wherein the thickness of the leveling layer is determined according to the unevenness degree of the original structure ground, and the deviation of the flatness after leveling is ensured to be within the range of 2 mm. Firstly, in the range of a floating foundation, ash cakes with unified heights are arranged every 0.5m, the size of each ash cake is 50mm multiplied by the thickness of a leveling layer, and the heights of five ash cakes are controlled by a level meter to be unified. After the ash cake is completely dried to a certain strength, adding water into the DS-M20 ground mortar for stirring until certain fluidity is met and the mixture is not too dilute. And shoveling the stirred mortar into the foundation by using a shovel, and ensuring that no mortar exists at the upper part of the ash cake so as not to influence the later leveling. And after the mortar is filled to the required height, scraping the mortar to the same elevation with the mortar cake by using a 1m scraping bar, and strictly forbidding people to tread before the mortar is not dried completely and reaches certain strength. And after the mortar reaches the strength, detecting the flatness by using a level gauge, sampling according to the interval of 0.50m, and meeting the requirement when the flatness deviation is within the range of 2 mm. After detection, the flatness reaches the construction requirement of the floating foundation after the DS-M20 ground mortar is leveled, and the next construction can be carried out.
Further, the construction method also comprises the following steps: the formwork is erected before the equipment foundation concrete is poured, and the formwork is dismantled after the equipment foundation concrete is poured and before the hoop concrete is constructed. The formwork is erected outside the pouring area by adopting bamboo plywood with the thickness of 12mm, and the bamboo plywood on the two sides is erected with a batten keel and is reinforced by adopting an external-bracing internal-pulling mode.
Further, the construction of the hoop concrete comprises the following steps: erecting a template at the periphery of a floating foundation structure and an equipment concrete vibration damping foundation; implanting a plurality of vertically arranged longitudinal steel bars into a concrete bottom plate at the inner side of the template, wherein each side surface is provided with two longitudinal steel bars, and the top of each longitudinal steel bar is provided with an upper reinforcing bar; and pouring concrete to form the hoop concrete structure. Because the steel bar connected with the ground is arranged in the hoop concrete, the lateral thrust of the floating foundation can be effectively resisted, and the direction-finding instability of the floating foundation is prevented.
Further, the construction method also comprises the following steps: and after the construction is finished, performing acoustic on-site rechecking, and calculating whether the requirements of sound absorption and vibration isolation are met. The main vibration reduction component of the sound absorption vibration reduction floating floor slab ground structure for the theater is the rubber cushion block, the natural frequency of the rubber cushion block is about 16-30Hz, the damping effect is obvious, and the vibration isolation performance is good.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a floor ground structure is built to sound absorption damping floating for theater, its characterized in that: the floor ground structure is built to sound absorption damping floating for theater includes concrete bottom plate, floats and builds foundation structure, equipment concrete damping basis and cuff concrete, it includes to build foundation structure to float:
a first waterproof layer disposed on top of the concrete floor;
the floating vibration isolation cushion layer is arranged on the top of the first waterproof layer;
the second waterproof layer is arranged on the top of the floating vibration isolation cushion layer;
the steel plate layer is arranged on the top of the second waterproof layer;
the device concrete vibration-damping foundation is cast and molded at the top of the steel plate layer, the hoop concrete is arranged on the peripheries of the floating foundation structure and the device concrete vibration-damping foundation, the top of the hoop concrete is flush with the top of the device concrete vibration-damping foundation, and the outer boundary of the floating foundation structure is arranged on the outer side of the device foundation;
and the floating vibration isolation cushion layer comprises sound-absorbing glass wool laid horizontally and a plurality of rubber cushion blocks arranged in the sound-absorbing glass wool and distributed in a matrix shape.
2. The sound absorbing and vibration damping floating floor ground structure for theaters according to claim 1, wherein: the top of the concrete bottom plate is provided with a ready-mixed mortar leveling layer, the outer boundary of the floating foundation structure is at least 150mm of the outer expansion of the equipment foundation, the inner wall of the hoop concrete is respectively attached to the outer walls of the floating foundation structure and the equipment concrete vibration reduction foundation, the hoop concrete is of a reinforced concrete structure, and a plurality of reinforcing steel bars fixedly connected with the concrete bottom plate are arranged in the hoop concrete.
3. The sound absorbing and vibration damping floating floor ground structure for theaters according to claim 1, wherein: inhale the cotton cross section of sound glass and be the square, it has a plurality of vertical through-holes that are the matrix form and distribute to open in the sound glass cotton to hold rubber pad, and rubber pad's bottom is pasted and is had the double faced adhesive tape, inhale the cotton thickness of sound glass with rubber pad's highly uniform to respectively along horizontal and longitudinally arranged adjacent two interval between the vertical through-hole equals, and the interval is less than or equal to 300 mm.
4. The sound absorption and vibration reduction floating floor ground structure for theaters according to claim 3, wherein: the square structure of vertical through-hole, just the rubber cushion is the square structure, the size of rubber cushion with the size of vertical through-hole is unanimous, so that the outer wall of rubber cushion with the inner wall of vertical through-hole closely laminates.
5. The sound absorbing and vibration damping floating floor ground structure for theaters according to claim 2, wherein: the first waterproof layer and the second waterproof layer are both PE films, the thicknesses of the first waterproof layer and the second waterproof layer are the same, and the cross-sectional areas of the ready-mixed mortar leveling layer, the first waterproof layer, the floating vibration isolation cushion layer, the second waterproof layer and the steel plate layer are equal.
6. The sound absorption and vibration reduction floating floor ground structure for theaters according to claim 5, wherein: the thickness of the first waterproof layer and the second waterproof layer is 1mm, the thickness of the floating vibration isolation cushion layer is 50mm, the thickness of the steel plate layer is 2mm, and the thickness of the ready-mixed mortar leveling layer is 20 mm.
7. The sound absorbing and vibration damping floating floor ground structure for theaters according to claim 1, wherein: the steel bars in the hoop concrete comprise a plurality of longitudinal steel bars, upper reinforcing bars and hooping bars, two longitudinal steel bars are arranged on each side face, the longitudinal steel bars are three-level steel bars with the diameter of 12mm, and the upper reinforcing bars are two three-level steel bars with the diameter of 10 mm.
8. A construction method of a sound absorption and vibration reduction floating floor ground structure for a theater is characterized in that: the construction method comprises the following steps:
measuring the flatness of the concrete bottom plate;
paving a first waterproof layer above the concrete bottom plate;
arranging a floating vibration isolation cushion layer on the top of the first waterproof layer, wherein sound-absorbing glass wool is laid on the top of the first waterproof layer, the center point of a rubber cushion block is released on the sound-absorbing glass wool, a plurality of vertical through holes are formed in the sound-absorbing glass wool, the rubber cushion block is placed in the vertical through holes, and the vertical through holes are distributed in a matrix shape;
laying a second waterproof layer on the top of the floating vibration isolation cushion layer;
paving a steel plate layer on the top of the second waterproof layer;
pouring a device concrete vibration damping foundation above the steel plate layer; and
constructing hoop concrete, wherein the hoop concrete is arranged on the periphery of the floating foundation structure and the equipment concrete vibration damping foundation, and the top of the hoop concrete is flush with the top of the equipment concrete vibration damping foundation.
9. The construction method according to claim 8, wherein: the construction method further comprises the following steps: if the flatness of the concrete bottom plate does not meet the requirement, arranging a ready-mixed mortar leveling layer on the measured concrete bottom plate so as to enable the flatness deviation after leveling to be within the range of 2 mm; the method comprises the steps of erecting a formwork before pouring of the equipment foundation concrete, and dismantling the formwork after pouring of the equipment foundation concrete and before construction of the hoop concrete, wherein the formwork is erected on the outer side of a pouring area through bamboo rubber plates with the thickness of 12mm, and flitch keels are erected on the bamboo rubber plates on the two sides and reinforced in an external-bracing and internal-pulling mode.
10. The construction method according to claim 8, wherein: the construction of the hoop concrete comprises the following steps: erecting a template at the periphery of a floating foundation structure and an equipment concrete vibration damping foundation; implanting a plurality of vertically arranged longitudinal steel bars into the concrete bottom plate on the inner side of the template, wherein two longitudinal steel bars are arranged on each side surface, and upper reinforcing bars are arranged at the tops of the longitudinal steel bars; and pouring concrete to form the hoop concrete structure.
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