Volume 03 Issue 03-2023
48
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
03
I
SSUE
03
Pages:
48-52
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.063
)
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
ABSTRACT
This article provides a broad understanding of the fact that architectural monuments remain under man-made
influences, different from natural ones, and measures to simulate these influences. Each architectural monument has
a specific building style of its time. It was observed that the outer barrier structures of the Ark fortress fell under the
influence of man-made, leading to the destruction of their structures. Accordingly, it is illuminated that the objects of
the architectural monument are not an optimal solution to the surroundings and protected areas for conducting
cultural and educational events.
KEYWORDS
Ancient urban planning, snow, rain, wind, land subsidence, landslides and earthquakes, umurbaki, equivalent,
protection area, range, speakers, border, audio Column, salutes, heavy trucks, gilded and air noise.
INTRODUCTION
Bukhara "Ark fortress" is an ancient urban planning
monument. The era of the reign of Abdullah Khan was
a vivid element of its construction. At the moment, the
structural parts of the external barrier structures of
the" Ark " fortress are under the influence of acoustic
devices (audio Column) and dynamic forces arising
from the blow of the wind. It is possible to list natural
Research Article
NEGATIVE IMPACT OF ACOUSTICS ON THE EXTERNAL BARRIER
STRUCTURES OF THE ARK FORTRESS
Submission Date:
March 21, 2023,
Accepted Date:
March 26, 2023,
Published Date:
March 31, 2023
Crossref doi:
https://doi.org/10.37547/ajast/Volume03Issue03-09
Mukhammadov Said Karimovich
Bukhara Engineering And Technology Institute, Uzbekistan
Khalilov Shokhibek Ota
bek O’g’li
Bukhara Engineering And Technology Institute, Uzbekistan
Journal
Website:
https://theusajournals.
com/index.php/ajast
Copyright:
Original
content from this work
may be used under the
terms of the creative
commons
attributes
4.0 licence.
Volume 03 Issue 03-2023
49
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
03
I
SSUE
03
Pages:
48-52
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.063
)
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
and man-made influences that negatively affect the
constructive part of the architectural monument.
Natural factors are: snow, rain, wind, earth subsidence,
Earth displacement and earthquakes.
Man-made factors: examples will be high-range
speakers (border) (audio Column), oscillations formed
from the movement of salutes and heavy cargo cars at
events in the territory of the architetura monument
protection. In addition, the gilded and air noise
generated from traffic on roads passing through the
protective part of the historical monument has a
significant negative impact on the life expectancy of
the monument. (Figure 1)
Figure 1
Of the natural factors that negatively affect the
architectural monument, M.The accumulation of rain,
snow waters of the Karimov, Afrosiob and Mirzo-Eid
streets on the side of the monument of the
roundabout road negatively affects the consistency of
the mixture, which retains the strength of external
barrier structures through the foundation of the
architectural monument. With this in mind, it is
advisable to install artificial lotocks for draining sewage
depending on the slope of the area of the arch
fortification. At the same time, the" Ark Citadel " is
located on the brink of the inner city road, this distance
is 14 meters. To limit the traffic of cars with a load of
more than 5 t, which has gilded and air noise, as well as
to install natural and advertising protection screens
from sound, to Green the area around the architectural
monument in order to absorb sound. During car traffic,
it is advisable to install signs prohibiting an alarm for
motor vehicles, in addition to specially equipped and
allowed cars. The surface of the Registan Square in
front of the arch fortification is covered with a
limestone coating. The area coating has a slope of 0.5%
relative to the building. According to this wastewater
does not stand still however, the type of soil layer
under the coating shows a negative effect on the
building base over a certain period of time that
moisture storage.
Volume 03 Issue 03-2023
50
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
03
I
SSUE
03
Pages:
48-52
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.063
)
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
Figure 2
The holding of various walks and events during the
rainy season on the Registan Square of the Ark fortress
leads to the fact that the vibrational architectural
monument formed from sound waves emanating from
acoustics equipment has a negative impact on the
strength of external barrier structures and the
appearance of micropores.
Figure 3 Figure 4
Volume 03 Issue 03-2023
51
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
03
I
SSUE
03
Pages:
48-52
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.063
)
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
Hence, the sound speed is 344 m /second when the air
temperature is +20 0С. The volume of Sound Devices
designed for various activities is 130 db, and the fact
that such a device is installed on two points has a large
resonance effect on the walls of the building.
All walls of the object are damaged by sound waves at
the expense of sound reproduction of buildings around
the historical monument. If the sounds emanating
from the sources hit and return to certain obstacles,
the sound adverb increases 2 times.
Figure 5
External barrier structures external noise absorption
𝑅
𝑡𝑟
= 𝐿
𝑆ℎ
𝑁
− 𝐿
𝑒𝑑
+ 10𝑙𝑔
𝑆
𝑅
т
+ 6db
;
𝐿
𝑆ℎ
𝑁
- external (street) noise pressure level, db;
𝐿
𝑒𝑑
- the permissible sound pressure level of the width surrounding the building, db;
S- noise-emitting surface area, m
2
𝑅
𝑡
- average sound absorption area of external barrier structures, m
2
𝑅
𝑡𝑟
= 130 − 40 + 10𝑙𝑔
9960
9960
+ 6 = 96db
Volume 03 Issue 03-2023
52
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
03
I
SSUE
03
Pages:
48-52
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.063
)
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
This in itself has a negative impact on the load-bearing
capacity of the architectural monument, as well as on
the life expectancy of external barrier structures.
Table 1, presented in Table 2.01.09-19 of construction
norms and rules, states that the sound equivalent level
of the design of areas at Point 7 of "the most marginally
permissible sound pressure, sound level, equivalent
and maximum sound levels of noise entering the
premises of residential and public buildings, the
maximum sound level is LAmax=55 db. The level of
sounds emanating from the sources laid on the site of
the architectural monument is a total of 260 db. Such
high sound vibrations cause micropores in External
barrier structures to develop and become cracked.
Accordingly, in order to ensure the viability of the Ark
fortress and to convey its original state to the future
generation, as well as to increase the tourism
potential, high sound levels should not be held on the
territory of the "Ark fortress". By doing this, we will
preserve another architectural monument, which is the
center of attention of tourists, with its bricks, which
speak of its era, and the majestic building tower.
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