Kurmanbek uulu Nurlan
Cand. Sci. (Eng.), associate
professor of
the “Highways, bridges and tunnels” Department of Kyrgyz State University of
Construction, Transport and Architecture named after N. Isanov. Bishkek,
Republic of Kyrgyzstan
Diagnostics and improving the safety of the railway bridge on the Uchkurgan-Tashkomur railway line on PC 17 + 494
Issue:
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The article describes and discusses in detail the
process of inspection and testing of the railway bridge on the Uchkurgan –
Tashkomur stage km 17+494, carried out by specialists of the Kyrgyz State
University of Construction, Transport and Architecture (KSUCTA) on the basis of
the contract with the Mostootryad SE NK Kyrgyz railway for the purpose of
assessing the technical state of pavement design, evaluation of its conformity
to requirements of standard documentation and preparation of technical findings
with conclusions and suggestions for further exploitation of the bridge and
increasing its operational safety.
Reducing the dynamic impact of a landslide on buildings and transport structures in the village of Toktogul, Uzgen district of the Kyrgyz Republic
Issue: #1-2024
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In the Kyrgyz
Republic, there is a significant increase in landslide activity against the
backdrop of ongoing climate change, especially in the southern mountainous
regions of the country. The volume of soil during a landslide in this region
can reach tens and hundreds of thousands of cubic meters, and in some cases
more. The rate of landslide displacement ranges from several meters per year to
several meters per second. The purpose of this study is to unload the landslide
area to protect the population, roads and other structures of the village of
Toktogul, Uzgen district of the Kyrgyz Republic. This landslide area was
studied on the basis of field research on the ground and the results of desk
work. The sliding of soil masses in the area can cause destruction and debris
of residential and administrative buildings, roads and power lines, as well as
injury and death. Considering
the equilibrium of the system of forces acting on the subsidence soil mass of
the slope section and analyzing them, measures for unloading the landslide body
in this section are proposed. The proposed longitudinal profiles of drainage
channels to reduce the moisture content of subsidence soil and transverse
profiles of developed soil to reduce the weight of subsidence soil are presented.
Based on the results of processing research data and analysis, it is
recommended to reduce the weight of unstable (subsidence) soil by stepwise
development along the slope of the site and transporting it up to 5 km for
subsequent brick production. It is also recommended to protect subsidence soil
from waterlogging by installing drainage channels. Based on the results of the
research, a real project was developed to protect the site from landslides near
the village of Toktogul. The proposed measures make it possible to reduce the
risk of a landslide in the area under consideration using methods and technical
means that are inexpensive and accessible to government agencies and local
administrations.
THE REAL TEST OF THE BRIDGE IN THE EXPLOSION TO CREATE A NATURAL DAM
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In this article deals with the study fluctuations in the beam of the bridge over Naryn river in the explosion at Kambar-Ata 2 for creating natural dams. Full-scale experiment was conducted to determine the dynamic parameters of the vibrations of the beam bridge, located near the explosion. The experiment was conducted using a portable engineering seismometric station Kyrgyz State University of Construction, Transport and Architecture. The study experimentally defined dynamic parameters of reinforced concrete beam bridge, the obtained records of displacement, acceleration of ground motion, the support and the span of the bridge. The results are processed and records fluctuations are the results of the study. The results dynamic parameters can be used in the calculation of bridges on the seismic effects.
THE REAL TEST ON THE BRIDGE ON THE MOVING LOADS
Issue:
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In this article deals with the test of the bridge on the moving load. Testing was conducted to determine the carrying capacity of the bridge for transportation on the impeller bridge for Kambar-Ata-2, with a total weight with trailer and towing vehicle 129 m. To solve this purpose visual inspection of the bridge were carried out, the bridge static test and the dynamic test the bridge. We obtain limit points for superstructures are more than moments of calculation, testing and carried excessive loads. According to the results of tests on the bridge transported excess load, the impeller for the Kambar-Ata-2 total weight of 129 tons.