scholarly journals METHOD OF TRANSMITTING THE COORDINATES OF THE TOTAL STATION TO THE POINTS OF THE INTERNAL CENTRAL NETWORK OF AN ENGINEERING CONSTRUCTION

2021 ◽  
Vol 26 (5) ◽  
pp. 52-62
Author(s):  
Georgij A. Ustavich ◽  
◽  
Nikolay S. Kosarev ◽  
Dmitriy A. Barannikov ◽  
Ivan A. Mezentsev ◽  
...  
Keyword(s):  
Thermal Power ◽  
Temperature Drop ◽  
Winter Season ◽  
Construction Sites ◽  
Total Station ◽  
Engineering Construction ◽  
Engineering Structure ◽  
Optical Media ◽  
Air Turbulence ◽  
Measurement Results

When creating an external planning and high-altitude justification on construction sites, and then internal center networks for the purpose of transmitting coordinates in a number of cases, geodetic measurements are performed through an optical medium, which in some areas has a different refractive index. This is the case when performing such measurements in the winter season, when the trans-mission is made through the technological gate of the temporary end of an engineering structure, for example, a nuclear or thermal power plant. The disadvantage of this method is the influence of significant air turbulence at the border of a sharp temperature drop in winter. To eliminate this influence, it is proposed to transmit coordinates inside the engineering structure through window openings. In this case, the total station can be located inside the engineering structure or outside it. When implementing the proposed method, the influence of a sharp temperature drop on the measurement results is almost completely excluded. Studies have established that when the coordinates are transmitted through the glass to the points of internal justification, a parallel transfer of the sighting beam occurs. To exclude it, the sighting must be performed at the horizontal position of the total station telescope. The article presents the results of studies of the accuracy of measuring distances and angles when the sighting (laser) beam of the total station passes through two optical media (air-glass-air) at different air temperature differences.

scholarly journals Engineering properties of fine grained soils of Kathmandu Valley, Nepal

1996 ◽  
Vol 14 ◽  
Author(s):  
T. P. Katel ◽  
B. N. Upreti ◽  
G. S. Pokharel
Keyword(s):  
Geotechnical Properties ◽  
Engineering Properties ◽  
Soil Conditions ◽  
Kathmandu Valley ◽  
Construction Sites ◽  
Engineering Construction ◽  
Fine Grained ◽  
The Past ◽  
Shearing Resistance ◽  
Watershed Boundary

This paper primarily deals with the distribution, and engineering and geotechnical properties of fine grained soils in the Kathmandu Valley. Not much studies have been done on these soils in the past except at some engineering construction sites such as bridges and heavy buildings. Very little data are available on the engineering and geotechnical properties of soils of the valley (IOE, 1983a, 1983b, 1986a, 1986b, 1986c; Koirala et al., 1993; Sadaula, 1993; Shakya, 1987; Soil Test, 1990a, 1990b). The authors conducted detailed laboratory studies on the soils of the Thapathali and Ratnapark areas in the central part of the Kathmandu Valley and the results are presented and discussed. An attempt is also made to broadly evaluate the soil conditions of the valley based on the available data from previous studies conducted by various agencies. The soils of the Kathmandu Valley are mainly produced by weathering of rocks within its watershed boundary. They are in most part lacustrine and fluvial in origin and composed of clayey, silty, sandy and gravely sediments. The maximum thickness of the sediment is found in the central part (550 m at Bhrikutimandap) and southern part (>457m at Harishidhi) of the valley. The engineering properties, basically the index properties such as grain size, natural moisture content specific gravity, Atterberg limits; and the mechanical properties such as penetration resistance, cohesion, unconfined compressive strength, compressibility as well as angle of shearing resistance of fine grained soils were determined and found to vary considerably both in horizontal and vertical directions. The bearing capacity and settlement values of the soils were also determined. It is commonly found that most of the buildings in the Kathmandu Valley are founded on isolated or strip types of foundations and the foundation depth is between 1 and 1.5 m. The study of soil properties of the Kathmandu Valley indicates that the heavy loaded structures should be founded on either raft, mat or pile types of foundation.

scholarly journals Views on Differential Management in Safety Supervision of Construction Engineering

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Song Yinghua
Keyword(s):  
Large Scale ◽  
Rapid Development ◽  
Science And Technology ◽  
Deep Foundation ◽  
Safety Risk ◽  
Construction Engineering ◽  
Engineering Construction ◽  
Engineering Structure ◽  
High Level ◽  
Socialist Market

Given the advances in science and technology, rapid development of socialist market economy and continuous advance of urbanization, it is necessary to enlarge the scale of engineering construction. As the form of engineering structure becomes more complex, large-scale and high-level projects with deep foundation have appeared in engineering construction. For construction engineering, one of its technologies includes solving the difficulties in construction. It is required to deal with the safety risk of construction in time to guarantee safety construction, timely solve the management difficulties and contradictory problems of the project and ensure both the safety of engineering construction and the rationalization of the institution setting of the safety supervision on the project. 

Intelligent Engineering Construction Management

2021 ◽  
pp. 140-161
Author(s):  
Min Hu ◽  
Huiming Wu ◽  
QianRu Chan ◽  
JiaQi Wu ◽  
Gang Chen ◽  
...  
Keyword(s):  
Information Management ◽  
Safety Management ◽  
Information Management System ◽  
Equipment Management ◽  
Construction Sites ◽  
Engineering Construction ◽  
Management Quality ◽  
Management Capacity ◽  
Intelligent Information ◽  
The City

Architecture is an important part of the city, and construction is an indispensable procedure of urban development. From the perspective of “smart construction sites,” this chapter describes the basic system architecture of intelligent information management system for engineering construction and introduces how to use information technology such as internet of things and artificial intelligence to improve the management capacity of engineering construction from the perspective of personnel management, quality management, safety management, equipment management, and environmental management. This chapter also analyzes the advantages and problems of intelligent construction sites in project management and gives specific measures and suggestions to realize smart construction sites.

scholarly journals Simultaneous observations of a Mesospheric Inversion Layer and turbulence during the ECOMA-2010 rocket campaign

2013 ◽  
Vol 31 (5) ◽  
pp. 775-785 ◽  
Author(s):  
A. Szewczyk ◽  
B. Strelnikov ◽  
M. Rapp ◽  
I. Strelnikova ◽  
G. Baumgarten ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Inversion Layer ◽  
Turbulent Energy ◽  
Northern Norway ◽  
Rocket Launch ◽  
Air Turbulence ◽  
Measurement Results ◽  
Ground Based Lidar ◽  
Lidar Observations

Abstract. From 19 November to 19 December 2010 the fourth and final ECOMA rocket campaign was conducted at Andøya Rocket Range (69° N, 16° E) in northern Norway. We present and discuss measurement results obtained during the last rocket launch labelled ECOMA09 when simultaneous and true common volume in situ measurements of temperature and turbulence supported by ground-based lidar observations reveal two Mesospheric Inversion Layers (MIL) at heights between 71 and 73 km and between 86 and 89 km. Strong turbulence was measured in the region of the upper inversion layer, with the turbulent energy dissipation rates maximising at 2 W kg−1. This upper MIL was observed by the ALOMAR Weber Na lidar over the period of several hours. The spatial extension of this MIL as observed by the MLS instrument onboard AURA satellite was found to be more than two thousand kilometres. Our analysis suggests that both observed MILs could possibly have been produced by neutral air turbulence.

scholarly journals Black carbon air pollution

Dela ◽  
2019 ◽  
pp. 5-43
Author(s):  
Kristina Glojek ◽  
Asta Gregorič ◽  
Matej Ogrin
Keyword(s):  
Air Pollution ◽  
Black Carbon ◽  
Rural Areas ◽  
Fine Particulate Matter ◽  
Winter Season ◽  
Meteorological Conditions ◽  
Karst Depression ◽  
Fine Particulate ◽  
Measurement Results ◽  
Temperature Inversions

The paper presents a study of air pollution caused by black carbon (BC) and fine particulate matter (PM) carried out in the rural area of the municipality of Loški Potok in the winter season of 2017/2018. Measurements of pollutants were performed at two different locations, one at Retje, a village at the bottom of a karst depression, and the other on the top of the Tabor hill in settlement Hrib. The measurement results exposed the main sources of black carbon air pollution in this area: domestic heating with biomass (almost 80% of all black carbon emissions) and unfavorable meteorological conditions for dilution of pollutants during temperature inversions. Three times higher concentrations were measured at Retje during temperature inversions than in the days of mixed atmosphere. In the winter of 2017/18, the average concentrations in the Retje hollow were even higher than those of Ljubljana, which calls attention to the problem of polluted air in rural areas too.

scholarly journals Research and Analysis of Damping Control Technology in Civil Engineering Construction Process

2014 ◽  
Vol 8 (1) ◽  
pp. 406-406
Author(s):  
Yonggang Bao ◽  
Qingwei Meng ◽  
Ki Bae Seo
Keyword(s):  
Active Control ◽  
Passive Control ◽  
Civil Engineering ◽  
Control Method ◽  
Rapid Development ◽  
Rational Approach ◽  
Engineering Structures ◽  
Engineering Construction ◽  
Engineering Structure ◽  
Civil Engineering Structure

With the rapid development of society and the economy, people's life and property safety importance is also more and more high. Especially the occurrence of the Wenchuan earthquake, people on whether the application of civil engineering construction damping scientific and rational approach was questioned. How to ensure the quality of civil engineering construction, to avoid in the event of earthquakes and other natural disasters, the emergence floor crash event, is an issue for all engineering designers and builders focus on. Because of the relationship with all life safety, so how to use rational scientific method damping to the construction of civil engineering structures is very important and necessary. This study from the passive control, active control, semi-active control and hybrid control methods start with four damping research and analysis, combining their research status. The Benchmark problem of structure control has carried on the simple introduction. Focusing on civil engineering structure vibration control method of systematic review, so as to the future of civil engineering structure suspension construction provides the certain reference function

scholarly journals A Study on Winter Season Measurement Results to cope with Dynamic Pricing for the VRF System

2015 ◽  
Vol 17 (3) ◽  
pp. 109-115
Author(s):  
Hwan-yong Kim ◽  
Min-seok Kim ◽  
Je-hyeon Lee ◽  
Young-hak Song
Keyword(s):  
Dynamic Pricing ◽  
Winter Season ◽  
Measurement Results

scholarly journals Characterization of Wet and Dry Deposition in the Downwind of Industrial Sources in a Dry Tropical Area

2001 ◽  
Vol 1 ◽  
pp. 266-274 ◽  
Author(s):  
Raj K. Singh ◽  
Raj M. Agrawal
Keyword(s):  
Power Plant ◽  
Dry Deposition ◽  
Thermal Power Plant ◽  
Wet Deposition ◽  
Thermal Power ◽  
Winter Season ◽  
Uttar Pradesh ◽  
Monthly Basis ◽  
Polluted Sites

An atmospheric deposition study was conducted in the downwind of Shaktinagar Thermal Power Plant (STPP), Renusagar Thermal Power Plant (RTPP), and Anpara Thermal Power Plant (ATPP), at Singrauli region, Uttar Pradesh (UP), India to characterize dry and wet deposition in relation to different pollution loading. During the study period, dry and wet depositions and levels of gaseous pollutants (SO2 and NO2) were estimated across the sites. Dry deposition was collected on a monthly basis and wet deposition on an event basis. Depositions were analyzed for pH, nitrate (NO3�), ammonium (NH4+), and sulphate (SO42�) contents. Dry deposition rate both collected as clearfall and throughfall varied between 0.15 to 2.28 and 0.33 to 3.48 g m�2 day�1, respectively, at control and maximally polluted sites. The pH of dry deposition varied from 5.81 to 6.89 during winter and 6.09 to 7.02 during summer across the sites. During the rainy season, the mean pH of clear wet deposition varied from 6.56 to 7.04 and throughfall varied from 6.81 to 7.22. The concentrations of NO2 and SO2 pollutants were highest during the winter season. Mean SO2 concentrations varied from 18 to 75 �g m�3 at control and differently polluted sites during the winter season. The variation in NO2 concentrations did not show a pattern similar to that of SO2. The highest NO2 concentration during the winter season was 50 �g m�3, observed near RTPP. NO2 concentration did not show much variation among different sites, suggesting that the sources of NO2 emission are evenly distributed along the sites. The concentrations of NH4+, NO3�, and SO42� ions in dry deposition were found to be higher in summer as compared to the winter season. In dry deposition (clearfall) the concentrations of NH4+, NO3�, and SO42� varied from 0.13 to 1.0, 0.81 to 1.95, and 0.82 to 3.27 mg l�1, respectively, during winter. In wet deposition (clearfall), the above varied from 0.14 to 0.74, 0.81 to 1.82, and 0.67 to 2.70 mg l�1, respectively. The study clearly showed that both dry and wet depositions varied between the sites and season, suggesting significant impact of industrial activities in modifying the atmospheric input. The nonacidic deposition suggests that there is no threat of acidification of the receiving ecosystem at present.

Experimental Study on Solidified Sludge with High Water Content

2011 ◽  
Vol 71-78 ◽  
pp. 4265-4268
Author(s):  
Zhe Wang ◽  
Ju Hao Hu ◽  
Li Li Yan
Keyword(s):  
Water Content ◽  
High Sensitivity ◽  
Good Deal ◽  
High Water ◽  
Engineering Properties ◽  
High Water Content ◽  
Construction Sites ◽  
Engineering Construction ◽  
Main Research ◽  
Strength Character

A good deal of high water content sludge which is produced in engineering construction, with high water content, low strength, high compressibility, low permeability, high sensitivity and other undesirable engineering properties, and often contaminated. How to deal with and make rational use of high water content sludge becomes the hot topic discussed by engineering and academia. The material used in this study is sludge with high water content from the Metro construction sites in Hangzhou. In this paper, our main research is the influences of the different contents of cement, lime, gypsum, fly-ash on the curing strength character of silt. The product structure was analyzed by XRD.

Reality Capture in Construction Engineering Applications Using Close-Range Photogrammetry

2013 ◽  
Vol 353-356 ◽  
pp. 2795-2798
Author(s):  
Fei Dai ◽  
Wei Bing Peng
Keyword(s):  
Laser Scanning ◽  
Construction Sites ◽  
Engineering Applications ◽  
Total Station ◽  
Construction Engineering ◽  
Building Products ◽  
Research Results ◽  
Close Range Photogrammetry ◽  
Close Range

In comparison with existing sensor technologies such as laser scanning and total station, the surveying technique of photogrammetry holds the advantages of being safe, inexpensive, efficient, and ease-to-use. This paper presents the research efforts of applying close-range photogrammetry to model 3D construction graphics, measure geometric dimensions of building products, and visualize changes and progress of dynamic construction sites. The research results demonstrate the potential of the investigated technique in solving construction jobsite problems.

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