Full text of "Code for Sound Insulation Design of Civil Buildings"

Chapter I General Provisions

Article 1.0. 1 This code is formulated to improve the use function of civil buildings and ensure a good indoor acoustic environment.

Article 65438 +0.0.2 This specification is applicable to the sound insulation and noise reduction design of main buildings in four types of buildings, such as houses, schools, hospitals and hotels, which are newly built, expanded and rebuilt in cities and towns throughout the country.

Among them, the design principle of residential buildings is also applicable to collective dormitories, but the design standard of collective dormitories should be one level lower than that of residential buildings.

The school building standard is applicable to general teaching rooms in primary and secondary schools and universities.

Hospital building standards are applicable to urban general hospitals, and specialized hospitals and other hospitals can adopt the standards of corresponding rooms in general hospitals.

Article 65438 +0.0.3 The standard grade of sound insulation and noise reduction design shall be determined according to the actual use requirements of the building, which is divided into super grade, first grade, second grade, third grade and * * *.

The meaning of standard grade is as follows:

Excellent

Level a

assistant

Three levels

Special standard

(According to special requirements)

Higher standards

General criterion

least

Article 65438 +0.0.4 The basic parameter of allowable noise level in this specification is A[ weighted] sound level. The allowable noise level of all kinds of buildings should be the standard value under the condition of window opening during the day, and the noise characteristics are steady noise. According to different noise characteristics (including peak factor, frequency characteristics, duration and fluctuation, etc. ), the noise measurement value should be revised according to the provisions of appendix 1 of this specification. The allowable noise level shall be measured when the noise source with the most serious influence emits sound, and the measurement method shall meet the requirements in Appendix II.

Note: For buildings without windows, such as air-conditioned hotel rooms, the allowable noise level refers to the noise value when the windows are closed.

Article 65438 +0.0.5 In addition to the provisions of this specification, the sound insulation and noise reduction design of civil buildings should also implement the current national standard "Evaluation Standard for Building Sound Insulation" and conform to the provisions of relevant national design standards and specifications.

Chapter II General Plane Noise Prevention Design

Article 2.0. 1 In urban planning, the division of functional areas, the distribution of traffic network, the setting of greening and isolation zones, the utilization of favorable terrain, and building shielding should meet the requirements of noise prevention design. Houses, schools, hospitals, hotels and other buildings should be far away from airports, railway lines, marshalling stations, stations, ports, docks and other buildings.

Article 2.0.2 Newly-built residential areas should arrange buildings insensitive to noise on traffic trunk lines outside residential areas as far as possible to form peripheral sound barriers. Traffic trunk lines should not pass through communities.

Note: Buildings insensitive to noise refer to buildings without noise prevention requirements, such as commercial buildings, which have noise prevention requirements, but whose external envelope has better noise prevention ability, such as hotels with air conditioning equipment.

Article 2.0.3 All kinds of ancillary facilities (such as boiler room and water pump room) with noise sources in the area where houses, schools, hospitals, hotels and other buildings are located should try their best to avoid noise interference to buildings, and noise prevention measures should be taken when necessary. No strong noise sources without effective control shall be set in the area.

Article 2.0.4 Before building design, the noise sources inside and outside the environment and the building should be investigated and determined in detail, and the noise-proof spacing, orientation selection and plane layout of the building should be considered comprehensively. When the above design still cannot meet the indoor quiet requirements, anti-noise measures should be taken in the building structure.

Article 2.0.5 When conditions permit, the noise source should be located underground, but it should not be adjacent to or under the main building. If it is unavoidable, reliable vibration isolation and sound insulation measures must be taken.

Article 2.0.6 Civil buildings with high requirements for quietness should be located on the windward side of the dominant wind direction of the main noise sources in this area in summer.

Chapter III Residential Buildings

Section 1 Allowable noise level

Article 3.65438 +0. 1 The allowable noise level of bedroom, study and living room in the house shall comply with the provisions in Table 3. 1. 1.

Table 3. 1. 1

Room name

Allowable noise level (A sound level, dB)

Level a

assistant

Three levels

Bedroom, study (or bedroom and living room)

≤40

≤45

≤50

sitting room

≤45

≤50

Section 2 Sound Insulation Standards

Article 3.2. 1 The air sound insulation standards for partition walls and floors shall comply with the provisions in Table 3.2. 1.

Air sound insulation standard

Table 3.2. 1

Position of retaining structure

Weighted sound insulation (decibel)

Level a

assistant

Three levels

Home walls and floors

≥50

≥45

≥40

Article 3.2.2 The impact sound insulation standard of the floor slab shall comply with the provisions in Table 3.2.2.

Impact Sound Insulation Standard Table 3.2.2

Floor position

Weighted standardized impact sound pressure level (dB)

Level a

assistant

Three levels

Household floor

≤65

≤75

Note: When there are difficulties, the standardized impact sound pressure level of the third floor can be allowed to be less than or equal to 85dB, but possible improvement conditions should be reserved in the floor structure.

Section 3 Sound Insulation and Noise Reduction Design

Article 3.3. 1 The location of children's playgrounds in residential buildings shall be selected to avoid noise interference to the house.

Article 3.3.2 When the residence is arranged along the urban main road, the bedroom or living room should not be located on the street side. If the design is really difficult, each household should have at least one master bedroom with its back to the noisy main road. When the above conditions are also difficult to meet, the public corridor or balcony facing the street can be used to take sound insulation and noise reduction measures. In order to reduce the noise introduced by doors and windows, the joints of doors and windows of external walls must be tight, and sealing strips should be adopted when necessary.

Article 3.3.3 In the residential plane design, the rooms adjacent to the partition wall and the rooms above and below the partition wall floor should belong to the same type.

Article 3.3.4 Kitchen, bathroom and elevator machine room should not be located on the upper floor of bedroom and living room, nor should elevators be arranged adjacent to bedroom and living room. When the kitchen or bathroom is adjacent to the bedroom, living room and study room, objects that may spread sound, such as pipes or equipment, should not be located on the walls of the bedroom, study room and study room. Vibration isolation measures should be taken for objects that may spread sound, such as pipes fixed on the walls.

Article 3.3.5 Garbage pipes should not be adjacent to bedrooms and living rooms. If there are conditions for adjacent arrangement, measures must be taken to prevent the spread of structural sound at the garbage dump.

Article 3.3.6 Sound absorption measures should be taken for closed stairwells or closed public corridors of houses with high quiet requirements.

The sound insulation capacity of doors facing stairwells or public corridors should not be less than 20dB.

Article 3.3.7 For a room with a ceiling, the space in the ceiling must be completely separated by a partition wall.

Article 3.3.8 When the boiler room and water pump room are located in or adjacent to the residence, reliable sound insulation and noise reduction measures must be taken.

Article 3.3.9 Measures should be taken to prevent sound transmission in smoke exhaust channels and water pipes between adjacent two households.

Article 3.3. 10 For buildings with good structural system integrity, such as large slabs and templates, measures should be taken to prevent the transmission of structural sound in areas where impact and vibration often occur, such as kitchen console, external doors, balcony doors and equipment pipes.

Chapter IV School Building

Section 1 Allowable noise level

Article 4. 1. 1 The allowable noise levels of various teaching rooms and teaching auxiliary rooms in school buildings shall comply with the provisions in Table 4. 1. 1.

Table 4. 1. 1

Room name

Allowable noise level (A sound level, dB)

Level a

assistant

Three levels

Rooms with special quiet requirements

≤40

Ordinary classroom

≤50

A room with no special quiet requirements

≤55

Note: ① Rooms with special quiet requirements refer to language classrooms, recording studios, reading rooms, etc. General classrooms refer to ordinary classrooms, historical geography classrooms, combined classrooms, natural classrooms, music classrooms, piano rooms, audio-visual classrooms, art classrooms, etc.

Rooms without special quiet requirements refer to gymnasiums and dance classrooms; Operational laboratories, teachers' offices and lounges, etc.

(2) When there is disturbing noise (such as singing) that is particularly easy to distract students' attention, the allowable noise level in Table 4. 1. 1 should be reduced by 5dB.

Section 2 Sound Insulation Standards

Article 4.2. 1 The air sound insulation standards of different room envelope structures shall comply with the provisions in Table 4.2. 1.

Air Sound Insulation Standard Table 4.2. 1

Position of retaining structure

Weighted sound insulation (decibel)

Level a

assistant

Three levels

Rooms with special quiet requirements

The partition wall and floor between ordinary classrooms

≥50

Ordinary classrooms and all kinds of noisy classrooms

The partition wall and floor between the activity rooms

≥45

The partition wall and floor between general classrooms.

≥40

Note: Noise-producing rooms refer to music classrooms, dance classrooms, piano rooms, gymnasiums and rooms with mechanical equipment that produce noise and vibration.

Article 4.2.2 The impact sound insulation standards of floors in different rooms shall comply with the provisions in Table 4.2.2.

Table 4.2.2 of Impact Sound Insulation Standard

Floor position

Weighted standardized impact sound pressure level (dB)

Level a

assistant

Three levels

Between rooms with special quiet requirements and general classrooms

≤65

Between the general classroom and the activity room that produces noise.

≤65

Between ordinary classrooms and classrooms

≤75

Note: ① When there are difficulties, the floor-weighted standardized impact sound pressure level between general classrooms can be allowed to be less than or equal to 85dB, but possible improvement conditions should be reserved in the floor structure.

(2) Rooms that produce noise refer to music classrooms, dance classrooms, piano rooms, gymnasiums and rooms equipped with machinery and equipment that produce noise and vibration.

Section 3 Sound Insulation and Noise Reduction Design

Article 4.3. 1 A school building located next to a traffic trunk road shall be equipped with a sports ground as a noise isolation zone along the trunk road.

A noise isolation belt with sufficient distance should be set between the school-run factory and the noise-producing teaching building. When the classroom has doors and windows facing the playground, the distance from the classroom exterior wall to the playground should not be less than 25m.

Article 4.3.2 In the absence of adequate noise reduction measures, mechanical equipment that produces strong noise and vibration shall not be set in the teaching building.

Article 4.3.3 The ceiling of the closed corridor, entrance hall and stairwell in the teaching building shall be provided with sound-absorbing materials with sound absorption coefficient not less than 0.50 (intermediate frequency 500 ~ 1000 Hz) when conditions permit, or with sound-absorbing materials with sound absorption coefficient not less than 0.30 on the ceiling of the corridor and the wall above the dado. The selection of sound-absorbing materials should meet the requirements of fire prevention.

Article 4.3.4 The reverberation time of various classrooms shall comply with the provisions in Table 4.3.4.

Reverberation schedule of each classroom 4.3.4

Room name

Room volume (m3)

500 Hz reverberation time

(usage)

Ordinary classroom

200

0.9

Mixed class classroom

500~ 1000

1.0

Music classroom

200

0.9

Piano room

& lt90

0.5~0.7

fitness room

2000

1.2

4000

1.5

8000

1.8

Dance classroom

1000

1.2

Note: The reverberation time values in the table can differ by 0.1s; The room volume can be changed by 10%.

Article 4.3.5 When noise-producing rooms (music classroom, dance classroom, piano room and gym) are located in a teaching building together with other teaching rooms, they should be arranged in different zones and sound insulation measures should be taken.

Chapter V Hospital Building

Section 1 Allowable noise level

Article 5. 1. 1 The allowable indoor noise level of wards and clinics shall comply with the provisions in Table 5. 1. 1

Table 5. 1. 1

Room name

Allowable noise level (A sound level, dB)

Level a

assistant

Three levels

Ward, medical staff lounge

≤40

≤45

≤50

clinic

≤55

≤60

operating room

≤45

≤50

Audiometric room

≤25

≤30

Section 2 Sound Insulation Standards

Article 5.2. 1 The air sound insulation standard of partition walls and floors of wards and consultation rooms shall comply with the provisions in Table 5.2. 1.

Air Sound Insulation Standard Table 5.2. 1

Position of retaining structure

Weighted sound insulation (decibel)

Level a

assistant

Three levels

Between wards

≥45

≥40

≥35

Between the ward and the noisy room.

≥50

≥45

Between the operating room and the ward

≥50

≥45

≥40

Between the operating room and the noisy room.

≥50

≥45

Enclosure structure of audiometry room

≥50

Note: The room producing noise refers to the room with noise or vibration equipment.

Article 5.2.2 The sound insulation standard of floor impact sound between ward and consulting room shall comply with the provisions in Table 5.2.2.

Table 5.2.2 of Impact Sound Insulation Standard

Weighted standardized impact sound pressure level of floor components (dB)

Level one, level two, level three

Between wards ≤65 ≤75

Between ward and operating room ≤75

Upper level of audiometry room ≤65

Note: When it is really difficult, the standardized impact sound pressure level of the floor in the ward can be allowed to be less than or equal to 85dB, but possible improvement conditions should be reserved in the floor structure.

Section 3 Sound Insulation and Noise Reduction Design

Article 5.3. 1 The general layout design of hospital buildings shall meet the following requirements:

First, the general layout of the general hospital should consider the sound insulation function of the building. The outpatient building can be arranged along the main road, but the distance from one side of the main road should consider the noise prevention requirements. Ward building should be located in the inner courtyard. The ward building is close to the main traffic road, and when the allowable indoor noise cannot meet the standard, the ward should not be located on the street side, otherwise the balcony or public corridor facing the street should be used to take sound insulation and noise reduction measures.

Second, the boiler room and water pump room of general hospital should not be located in the ward building, and should be more than 0/0m away from the ward/kloc. If it must be located in the ward building, it should be an independent area, and reliable vibration and sound insulation measures should be taken.

Article 5.3.2 The pipeline gap passing through the ward must be sealed. The observation window of the ward should be sealed.

The garbage well or sewage well in the ward building shall not be adjacent to the ward, and measures shall be taken to prevent the transmission of structural sound at the inverted entrance.

When conditions permit, sound absorption measures should be taken for the ceiling of the corridor in the ward building; The sound absorption coefficient of the ceiling can be 0.30 ~ 0.40.

Article 5.3.3 The ceiling of the registration hall, waiting hall and triage hall (room) shall be sound-absorbed; The sound absorption coefficient of the ceiling can be 0.30 ~ 0.40.

Article 5.3.4 operating room should choose low noise air conditioning equipment, noise reduction measures should be taken when necessary.

The upper part of the operating room of medical technology department should not be equipped with mechanical and electrical equipment of vibration source; If it is difficult to avoid in design, vibration isolation measures should be taken.

Article 5.3.5 The listening room shall be designed as a fully floating building, and the air conditioning system shall be equipped with a muffler.

There should be no room with vibration or strong noise equipment in the upper part of the listening room or adjacent rooms.

Article 5.3.6 The blower, induced draft fan, cooling tower and other equipment in the boiler room should adopt low-noise products; When necessary, noise reduction measures should be taken.

Chapter VI Hotel Construction

Section 1 Allowable noise level

Article 6. 1. 1 The allowable noise level of the hotel shall comply with the provisions in Table 6. 1. 1.

Table 6. 1. 1

Allowable noise level of room name (dB)

Super one, two and three categories

Guest Room ≤35 ≤40 ≤45 ≤55

Meeting room ≤40 ≤45 ≤50≤50

Multifunctional hall ≤40 ≤45 ≤50-

Office 45 ≤ 50 ≤ 55 ≤ 55

Dining room and banquet hall ≤50 ≤55 ≤60-

Section 2 Sound Insulation Standards

Article 6.2. 1: The air sound insulation standard of the guest room envelope shall comply with the provisions in Table 6.2. 1.

Table 6.2. 1

Weighted sound insulation of enclosure structure (dB)

Super one, two and three categories

Room partition wall ≥50 ≥45 ≥40

Partition walls of rooms and corridors (including doors) ≥40 ≥35 ≥30

Guest room exterior wall (including windows) ≥40 ≥35 ≥25 ≥20.

Article 6.2.2 The impact sound insulation standard of guest room floor shall comply with the provisions in Table 6.2.2.

Table 6.2.2 Impact Sound Insulation Standard for Guest Rooms

Weighted standardized impact sound pressure level of floor components (dB)

Super one, two and three categories

Floor slab between rooms ≤55 ≤65 ≤75

The floor between the guest room and each vibration room is ≤55 ≤65.

Note: When the machine room is on the upper floor of the guest room and the floor impact sound insulation can not meet the requirements, vibration isolation measures must be taken for mechanical equipment.

When there are difficulties, the three-level weighted standardized impact sound pressure level between rooms can be allowed to be less than or equal to 85dB, but possible improvement conditions should be reserved in the floor structure.

Section 3 Sound Insulation and Noise Reduction Design

Article 6.3. 1 The general layout design of the hotel building shall meet the following requirements:

First, the general layout of the hotel should be partitioned according to the noise situation, so that the facilities that produce noise or vibration (such as blowers, induced draft fans, pumps, cooling towers, etc.). ) Stay away from guest rooms and other rooms that need to be quiet.

2. When arranging rooms along main roads or parking lots, noise prevention measures should be taken, such as using closed windows (for air-conditioned hotels); You can also use the balcony or veranda for sound insulation and noise reduction.

Article 6.3.2 The sound insulation design of guest rooms and guest rooms shall meet the following requirements:

First, the air supply and exhaust pipes between rooms must be silenced, and silencing devices equivalent to the sound insulation capacity of the partition walls of adjacent rooms must be set up.

2. Stairs that generate noise in high-rise hotels, elevators, booster pumps, water tanks and other rooms in hotels should not be adjacent to rooms that need to be quiet, conference rooms and multi-function halls, and should not be located in the upper parts of these rooms. If it must be installed on the upper part, reliable vibration isolation and noise reduction measures should be taken.

Third, when configuring rooms on both sides of the corridor, the doors of the opposite room should be staggered as far as possible.

When conditions permit, the corridor should adopt sound absorption treatment measures, such as carpet or sound absorption ceiling. The average sound absorption coefficient can be 0.30 ~ 0.40, and the corridor is separated by spring doors when it is too long.

Four, adjacent rooms bathroom partition, should build by laying bricks or stones to the bottom of the upper floor, leaving no gap. Equipment pipes, sockets, etc. Measures should be taken to prevent sound transmission on the partition wall of adjacent rooms.

Five, the public toilets in the guest room building (toilets, bathrooms), should be equipped with a front room. Article 6.3.3 Medium-sized conference rooms and multi-function halls should be designed with reverberation time, and their shapes should consider sound diffusion to avoid serious acoustic defects.

For conference rooms and multi-function halls with movable partitions, the sound insulation capacity of movable partitions should not be less than 35dB.

Article 6.3.4 Restaurants, boiler rooms and cooling towers in hotel buildings should not be located in guest rooms. If it must be located in the guest room building, it should be an independent area, and sound insulation and vibration isolation measures should be taken.

Appendix 1 Correction of indoor allowable noise level and noise measurement value and conversion of corresponding evaluation curve

First, due to the different time of day and night, the indoor noise level is allowed to be revised.

The allowable noise level in this specification is set according to the requirements of daytime. If the measurement time is inconsistent with this, it shall be revised according to the attached table 1. 1.

Attached table 1. 1 is the allowable noise level correction value at different times.

time

Correction value (a sound level, dB)

During the day (06: 00 ~ 22: 00)

At night (22: 00 ~ 06: 00)

- 10

Note: The time of day and night in the table can also be determined according to the local people's government and regional habits and seasonal changes.

Secondly, due to the different noise characteristics, the noise measurement values should be corrected according to the noise measurement values with different characteristics. The correction value shall conform to the provisions of Schedule 1.2.

Attached table 1.2 is the correction value of noise measurement value due to different noise characteristics.

noise characteristic

Correction value

(A sound level, decibel)

Stable noise

Constant and steady noise

Pulse steady-state noise (such as hammering and riveting)

Steady-state noise containing audible pure tones (such as dog barking and bee buzzing)

Unstable noise

Intermittent noise

The percentage of time occupied by noise in half an hour.

100~56

56~ 18

18~6

& lt six

-5

- 10

- 15

Noise (such as traffic noise) whose sound level fluctuates with time and changes complicated.

Note: For noise whose sound level changes with time, the allowable noise level should be equivalent to [continuous A] sound level.

The measurement of equivalent [continuous A] sound level shall meet the requirements in Appendix II.

Three. Conversion between noise level and corresponding noise evaluation curve

In the sound insulation design, sometimes there are certain requirements for the frequency spectrum of noise. The measured noise level can be converted into a noise evaluation curve according to the following formula.

NR = La-5 (and 1. 1)

Where NR—— is noise evaluation curve;

La-measured noise level (dB).

The noise evaluation curve can be adopted according to the attached figure 1. 1. The sound pressure level of octave can be calculated by pressing.

Schedule 1.3 is adopted.

Appendix II Allowable Noise Level and Sound Insulation Measurement Method

A, allowable noise level measurement method

1? The measuring equipment shall be Type 2 sound level meter or sound level meter with better performance than Type 2, which conforms to the national standard "Electroacoustic Performance and Test Methods of Sound Level Meter". Other acoustic measuring instruments with equivalent performance can also be used, such as statistical analyzer, recorder and tape recorder.

2? The measured value is a sound level or equivalent [continuous A] sound level.

3? The measurement time should be in two different time periods, day or night, and the measurement should be made at less favorable time.

4? The measuring point should be located in the center of the room, the distance from each reflecting surface (such as wall) should be greater than 1.0m, and the height of the measuring point should be1.2 ~1.5m. ..

5? Measurement methods and data processing shall meet the following requirements:

(1) Except for rooms that don't need to be windowed during use (such as air-conditioned rooms), the measurement should be carried out with windows opened.

(2) For steady-state noise, read the A sound level with a sound level meter or other measuring instruments, observe 5 ~ 155s, and take the median value of the pointer.

(3) For intermittent unsteady noise, the measurement of sound level A is the same as that of steady noise. And record the interval time of noise within 0.5h, and calculate the time proportion of noise.

(4) For noise whose sound level changes with time, the equivalent [continuous A] sound level shall be measured. A sound level can be read every 3 ~ 5s within the specified time t, and the continuous reading should not be less than 200. When sorting, the read data will be arranged from large to small in the data table. The equivalent [continuous A] sound level can be calculated as 3. 1 according to the attached formula.

Where n refers to the number of readings;

Lpai-the I-th measured sound level reading, dB.

When the measured A sound level data conforms to the normal distribution, the equivalent [continuous A] sound level can be calculated according to the approximate formula attached to 3.2.

Note: For the arrangement of equivalent [continuous A] sound level measurement data, please refer to the current national standard "Urban Environmental Noise Measurement Method" GB 3222-82.

Second, the sound insulation measurement method

Sound insulation measurement should be carried out according to the current national standard "Code for Sound Insulation Measurement of Buildings". If there is any difficulty, a simple sound insulation measurement method can be adopted.

Note: The simple sound insulation measurement method can be implemented according to the Interim Provisions on Sound Insulation Measurement of Residential Buildings in Appendix B of the ministerial standard Sound Insulation of Residential Buildings.

Appendix III explanation of terms used in this specification

1. When implementing the provisions of this standard, the strict words are described as follows, so as to be treated differently in implementation.

1? Very strict, if you have to do it:

The positive word is "must";

The negative word is "forbidden".

2? Strict requirements, what should be done under normal circumstances:

The positive word is "should";

Negative words are "should not" or "should not".

3? If you have a slight choice, you should do it first if conditions permit:

The positive words are "Yi" or "Ke";

The negative word is "inappropriate".

Two, the provisions that should be implemented in accordance with other relevant standards and norms should be written as "should be in accordance with" or "should meet the requirements of ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

Additional notes:

List of editor-in-chief, participating units and main drafters

Editor-in-Chief: China Institute of Building Science.

Participating unit: Tongji University

Shanghai civil architecture design institute

Beijing architecture design institute

Tsinghua University

Tianjin University

Southeast China University

Chongqing Institute of Civil Engineering and Architecture

Taiyuan University of Technology

Harbin Institute of Civil Engineering and Architecture, South China University of Technology