Crack Survey and Cause Analysis of a Complex in Huatugou of Qaidam Basin

2013 ◽  
Vol 351-352 ◽  
pp. 1102-1107
Author(s):  
Qing Zhang ◽  
Wan Li Pu
Keyword(s):  
Saline Soil ◽  
Qaidam Basin ◽  
Present Situation ◽  
Climatic Conditions ◽  
Geological Condition ◽  
Cause Analysis ◽  
Soil Area

Huatugou in Qaidam Basin is a saline soil area with special geological condition, and there has special climatic conditions. The buildings appear serious cracks and inclined in this area. This article uses the investigation and inspection which we collect to analyze the present situation for the buildings. Explain why this situation happened and put forward some treatments.

scholarly journals Streptohalobacillus salinus gen. nov., sp. nov., a moderately halophilic, Gram-positive, facultative anaerobe isolated from subsurface saline soil

2011 ◽  
Vol 61 (5) ◽  
pp. 1127-1132 ◽  
Author(s):  
Xiaowei Wang ◽  
Yanfen Xue ◽  
Yanhe Ma
Keyword(s):  
Saline Soil ◽  
Qaidam Basin ◽  
Halophilic Bacterium ◽  
Diaminopimelic Acid ◽  
Rrna Gene ◽  
16S Rrna Gene Sequences ◽  
Moderately Halophilic ◽  
Moderately Halophilic Bacterium ◽  
The Family ◽  
Diamino Acid

A Gram-stain-positive, rod-shaped, non-sporulating, motile and moderately halophilic bacterium, designated strain H96B60T, was isolated from a saline soil sample of the Qaidam basin, China. The strain was facultatively anaerobic. Major end products formed from glucose fermentation were acetate, ethanol and lactic acid. The cell-wall peptidoglycan contained meso-diaminopimelic acid as the diagnostic diamino acid. The isoprenoid quinone component was menaquinone-6 (MK-6). The predominant cellular fatty acids were C16 : 0, anteiso-C13 : 0 and anteiso-C15 : 0. The genomic DNA G+C content of strain H96B60T was 36.2 mol%. Phylogenetic analysis based on comparative 16S rRNA gene sequences indicated that strain H96B60T represented a novel phyletic lineage within the family Bacillaceae and was related most closely to Halolactibacillus species (96.1–96.4 % similarity). Based on the phenotypic, chemotaxonomic and phylogenetic data presented, strain H96B60T is considered to represent a novel species of a new genus, for which the name Streptohalobacillus salinus gen. nov., sp. nov. is proposed. The type strain of Streptohalobacillus salinus is H96B60T ( = DSM 22440T  = CGMCC 1.7733T).

scholarly journals Geochemical Significance of Clay Minerals and Elements in Paleogene Sandstones in the Center of the Northern Margin of the Qaidam Basin, China

Minerals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 505 ◽  
Author(s):  
Guoqiang Sun ◽  
Meng Wang ◽  
Jiajia Guo ◽  
Yetong Wang ◽  
Yongheng Yang
Keyword(s):  
Clay Minerals ◽  
Chemical Weathering ◽  
Qaidam Basin ◽  
Sedimentary Environment ◽  
Climatic Conditions ◽  
Northern Margin ◽  
Magmatic Arc ◽  
Average Value ◽  
Geochemical Significance ◽  
Continental Magmatic Arc

The average thickness of Paleogene sandstones reaches about 3000–4000 m at the northern margin of the Qaidam Basin. However, the provenance and sedimentary environment of these sandstones are uncertain; thus, more comprehensive research is needed. Integrated research is conducted on the provenance and weathering process based on petrographic characteristics, clay minerals, and geochemical compositions of sandstones in the center of the northern Qaidam Basin. The results of lithofacies analysis show that the Paleogene sandstones were mainly derived from an active continental magmatic arc, subduction accretion, or a fold-thrust belt. The average illite content in the Paleogene clay minerals is more than 50%, followed by chlorite and smectite, which reflect climatic and environmental characteristics that were arid to semi-arid, whereas the characteristics of carbon–oxygen isotopes reveal a mainly freshwater sedimentary environment. The corrected chemical index of alteration (CIAcorr) is between 56.3 and 75.7, with an average value of 66.5. These results indicate that the provenance of the Paleogene sandstones in the center of the northern Qaidam Basin mainly formed under cold and dry climatic conditions and experienced limited chemical weathering with a small amount that underwent intermediate chemical weathering under warm and humid conditions.

scholarly journals Methods of Freeze Protection for Fruit Trees by Means of Renewable Energy Sources

2021 ◽  
Vol 288 ◽  
pp. 01001
Author(s):  
R. A. Kasymbekov ◽  
N. Y. Temirbaeva ◽  
S. O. Nazarov ◽  
Y. Zh. Osmonov ◽  
Nurzhan Murat
Keyword(s):  
Heat Transfer ◽  
Specific Heat ◽  
Root System ◽  
Renewable Energy Sources ◽  
Soil Surface ◽  
Fruit Trees ◽  
Climatic Conditions ◽  
The Earth ◽  
Soil Area ◽  
Phenological Phases

As the Earth climate changes, the current horticulture gives rise to an acute issue - protecting fruit trees from spring frosts and their root system from freezing in severe winters with little snow. The authors substantiated the methods of how to protect fruit trees from frost and their root system from freezing, as well as a method of how to control their phenological phases based on the study of the heatmass- exchange intensification in a certain soil area occupied by the root system of a tree with various engineering aids to be designed. The aforesaid method is based on the operation of a heat and cold separator, which makes it possible to intensify heat transfer and expand the area of specific heat loads removed using a coolant - potassium salt brine (aqueous 30% KCL solution). The test results have shown that the coolant heated by the heat of the soil to a temperature of 12°С, gradually moving up at a depth of 0.9 m, heats the soil to 7°С at a depth of 0.5 m and up to 1°С on the surface of the earth at an ambient temperature of up to - 10°С. The heat of the lower soil layers comes up to the surface; in the soil area occupied by the root system, the temperature is redistributed, stabilized in a state that excludes freezing of the root system of the fruit tree. A rational value of the effective head has been determined to be equal to 2200 Н/m2 at the depth of the heated soil surface up to 1 m, with a specific heat flow of about 4•105 W/m2. In addition, a rational flow rate of the coolant is set equal to (1.5 ... 2.5) Gmin to produce more optimal heat transfer and additional body force of the heat and cold separator. The method of controlling the phenological phases of fruit trees by heating or cooling a certain soil area occupied by the root system is possible using an installation that generates power from the renewable resources (solar energy, wind or biogas plant), depending on climatic conditions and terrain.

Subgrade Design and Construction Technology for Saline Soil Area

2015 ◽  
Vol 744-746 ◽  
pp. 641-646
Author(s):  
Bi Hong Song ◽  
Cong Han ◽  
Jian Hua Chen ◽  
Xue Li Shan ◽  
Chun Yan Wang
Keyword(s):  
Saline Soil ◽  
Hazard Analysis ◽  
Favorable Effect ◽  
Construction Technology ◽  
Sand Layer ◽  
Aeolian Sand ◽  
Engineering Construction ◽  
Antiseptic Treatment ◽  
Soil Area ◽  
Design And Construction

The design scheme and engineering construction technology are proposed for an accommodation highway subgrade on the basis of forming reasons and hazard analysis of saline soil in Xinjiang region. In the design, major measures adopted include basement replacement, setting aeolian sand layer and composite geotextile layer, strengthening the subgrade waterproofing and drainage, antiseptic treatment of structures, etc. This paper introduces the subgrade design and construction technology, of which the implementation and application on the test section have achieved a favorable effect and can be taken as the basis for design and construction of similar saline soil subgrade.

Assessment of Social Impacts of a Reservoir on a Saline Soil Area in Northeast Thailand

2012 ◽  
Vol 622-623 ◽  
pp. 1659-1663 ◽  
Author(s):  
Uba Sirikaew ◽  
Uma Seeboonruang
Keyword(s):  
Saline Soil ◽  
Production Method ◽  
Social Impacts ◽  
Social Changes ◽  
Way Of Life ◽  
Flood Prevention ◽  
Salt Production ◽  
Salt Mines ◽  
The Social ◽  
Soil Area

Although useful in flood prevention and as the source of water for irrigation and consumption, reservoirs could nevertheless not merely create negative social impacts for those living near them but also wreak havoc on the environment following their construction. These environmental and social impacts should be addressed especially in the Northeastern part of Thailand where their history revolving in salt mines and traditional salt production. The attitude questionnaires were used in this study to assess the impacts of a reservoir operation in a saline soil area on the social changes in 8 aspects. It was found, based on more than 160 replied questionnaires, that even if most respondents saw that the reservoir improved their standard of living in several aspects, a number of the respondents expressed concerns that their traditional way of life and ancient salt production method were disappearing. These people did express their concerns for their own safety, their worries about their community future, and hopes for better future of their own and that of their children.

Experimental Research on Engineering Properties of Natural Coarse Saline Soil as the Subgrade Filler

2015 ◽  
Vol 744-746 ◽  
pp. 485-489 ◽  
Author(s):  
Qiu Mei Zhang ◽  
Jin Tao Tang ◽  
Hong Bin Deng
Keyword(s):  
Saline Soil ◽  
Engineering Properties ◽  
Coarse Particles ◽  
Land Area ◽  
Road Engineering ◽  
Construction Engineering ◽  
Freeze Thaw ◽  
High Level ◽  
Saline Land ◽  
Soil Area

Bases on the project of typical natural coarse saline soil area ,Startis from the saline soil salt expansion characteristics of seven cycles of freeze-thaw cycling test and saline soil subgrade model test ,concluses not only the oil can make roadbed fillers for highway and first-class highway directily , but provides experiences for saline land area of natural coarse particles of high highway designs and construction engineering. Meanwhile, this paper also provides reference experiences for the design and construction of high level road engineering at natural coarse saline soil regions.

scholarly journals Spatiotemporal Patterns and Cause Analysis of PM2.5 Concentrations in Beijing, China

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Guangjin Tian ◽  
Xiaojuan Liu ◽  
Lingqiang Kong
Keyword(s):  
Human Life ◽  
Warning Signal ◽  
Climatic Conditions ◽  
Annual Average ◽  
Cause Analysis ◽  
Air Index ◽  
Different Seasons ◽  
Temporal And Spatial ◽  
Atmospheric Concentrations ◽  
Beijing China

According to the monthly comprehensive air index ranking in China in 2016, Beijing ranked in the bottom tenth three times, indicating that the air pollution situation is very serious compared to other cities in China. In this study, we chose 23 urban environmental assessment points, which covered all districts and counties in Beijing. We used ArcGIS software to analyze atmospheric concentrations of particulate matter with a diameter < 2.5 μm (PM2.5) for each month of 2016 in each district/county of Beijing. Our results showed that PM2.5 concentrations in winter and spring were generally higher than those in summer and autumn. The higher monthly average PM2.5 concentrations were primarily in the southwest and southeast areas. The higher annual average values were distributed in Fangshan, Daxing, and Tongzhou, which were closely related to the high terrain in the northwest and the low-lying terrain in the southeast, the “Beijing Bay” terrain, and local climatic conditions. The temporal and spatial distributions of PM2.5 constitute a warning signal for human life and production during different seasons and regions.

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