Key Construction Techniques of 4000m2 Hyperbolic Cooling Tower

2013 ◽  
Vol 438-439 ◽  
pp. 548-552
Author(s):  
Hui Wang
Keyword(s):  
Cooling Tower ◽  
Mass Concrete ◽  
Construction Process ◽  
Power Station ◽  
Construction Techniques ◽  
Geometric Size ◽  
Specific Technology ◽  
Hyperbolic Cooling Tower ◽  
Main Construction

Combined with a 2×350MW gas power station project, the main construction process and specific technology of each subentry project for a large hyperbolic cooling tower were described in details. The customized steel templates were used and positioned by accurate calculation. The mass concrete was poured by alternative bay construction which replaced deformation joint and after-pouring belt. The measures such as controlling temperature, avoiding leakage and monitoring geometric size were taken actively. These methods greatly improve the quality of the structure and are strong guarantee for achieving high-quality project.

Calculation of Temperature Rise of Mass Concrete and Modification of Formula

2012 ◽  
Vol 594-597 ◽  
pp. 742-748
Author(s):  
Yu Ming Hu ◽  
Chuan Liang
Keyword(s):  
Temperature Rise ◽  
Tall Buildings ◽  
Mass Concrete ◽  
Construction Technology ◽  
Construction Process ◽  
Actual Measurement ◽  
Measurement Results ◽  
And Function ◽  
Peak Value

With the continuous improvement of China’s construction technology, the application of mass concrete structures is increasingly popular in various structures in order to meet the requirements of structure and function, such as tall buildings, dams, railways and highways. There are all kinds of cracks in construction process because of the big cross section. There are many reasons to form cracks, but temperature is the most common cause. It is vital to the construction quality of mass concrete that the hydration heat, especially the peak value of temperature rise, is calculated in advance and precautions are implement in construction process accordingly. In this article, the calculation formula modified is derived through analyzing the common calculation formulas of mass concrete, the actual measurement results and the influencing factors of temperature rise.

Analysis on the Mass Concrete Test and Application in Stadium Project

2013 ◽  
Vol 416-417 ◽  
pp. 1738-1740
Author(s):  
Chun Hong Xu ◽  
Zhan Fu Jing
Keyword(s):  
Mass Concrete ◽  
Construction Technology ◽  
Construction Process ◽  
Concrete Technology ◽  
Technical Application ◽  
Engineering Construction ◽  
Key Points ◽  
Series Of Experiments

Mass concrete technology has been widely used in the construction field. In engineering construction, the quality and construction technology of mass concrete are directly related to the quality of the projects. Thus, before the construction of mass concrete, a series of experiments should be made, and also the key points of the construction technology should be strictly followed in the construction process. In this paper, by taking the application of mass concrete in stadium project as an example, the test before the construction of mass concrete and the technical application in the construction are analyzed.

Construction Techniques and Measures of GFRP Bars Pile in the Excavation

2014 ◽  
Vol 501-504 ◽  
pp. 2209-2212
Author(s):  
Xiu Hua Li ◽  
Wei Min Cong ◽  
Chen Xi Yue ◽  
Chun Qing Hu
Keyword(s):  
Construction Projects ◽  
Foundation Engineering ◽  
Construction Process ◽  
Gfrp Bars ◽  
Appearance Quality ◽  
Construction Techniques ◽  
Supporting Structures

GFRP bars pile as supporting structures for application in foundation engineering, the construction process of molding and banding quality directly affects the safety of the structure, ease of construction and appearance quality. Through practice on multiple projects, worked out a more mature construction process, better control of the quality of construction projects GFRP bars, standardized operating procedures.

scholarly journals Research on Innovative Practice of Civil Engineering Construction Technology

2021 ◽  
Vol 248 ◽  
pp. 03030
Author(s):  
Li Hai-chao
Keyword(s):  
Construction Industry ◽  
Cost Reduction ◽  
Civil Engineering ◽  
Economic Benefits ◽  
Construction Technology ◽  
Construction Process ◽  
Engineering Construction ◽  
Construction Techniques ◽  
Depth Analysis

Nowadays, my country’s economy is developing faster and faster, people’s living conditions are gradually improving, and people’s requirements for the quality of life are also improving. Housing is a place where people often come and go. The quality of housing is related to people’s daily life safety and also affects economic development. Therefore, the construction industry should pay attention to the improvement of the quality of housing and provide people with high-quality housing construction. For civil engineering, on the basis of ensuring the quality, the construction unit needs to fully consider the economic benefits, so that the construction unit can achieve quality and cost reduction. In order to ensure that the quality of civil engineering meets the standards proposed by the country, the construction unit needs to plan the details of the building in detail during the construction process and adopt standardized construction techniques. Therefore, this article will conduct an in-depth analysis on the innovation of civil engineering construction technology, so as to facilitate the reference of relevant construction units.

Development and Application of Quality Control System for Highway Subgrade Construction

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Tong Wang
Keyword(s):  
Quality Control ◽  
Real Time ◽  
Detection Method ◽  
System Development ◽  
Effective Control ◽  
Construction Process ◽  
Development Mode ◽  
The Road ◽  
Whole Process

The compaction quality of the subgrade is directly related to the service life of the road. Effective control of the subgrade construction process is the key to ensuring the compaction quality of the subgrade. Therefore, real-time, comprehensive, rapid and accurate prediction of construction compaction quality through informatization detection method is an important guarantee for speeding up construction progress and ensuring subgrade compaction quality. Based on the function of the system, this paper puts forward the principle of system development and the development mode used in system development, and displays the development system in real-time to achieve the whole process control of subgrade construction quality.

Improvements in Data Acquisition for Propulsion Shaft Alignment

2015 ◽  
Author(s):  
W. David Joiner ◽  
Charles J. Cook
Keyword(s):  
Data Acquisition ◽  
Strain Gage ◽  
Strain Gages ◽  
Construction Process ◽  
Crucial Step ◽  
Ship Construction ◽  
Shaft Line ◽  
Load Cells ◽  
Shaft Alignment

Propulsion shaft alignment is a necessary and crucial step in the ship construction process, with manning and schedule constraints requiring accurate results as efficiently as possible. There are two methods for measuring the bearing loading along the shaft line: strain gages and load cells. The legacy method for using strain gages required a lot of man power and the legacy method for using load cells was dependent on the quality of machinist made available. Strain gages are the transducers of choice for measurement; however the data acquisition, especially for ships with long shafting systems, can require many strain gage positions and personnel to conduct tests. Load cells are used to validate the accuracy of the strain gage method and to calculate the shaft runout at each bearing location.

Specimen Molding Method of Chip Seal in Laboratory

2011 ◽  
Vol 374-377 ◽  
pp. 1904-1907
Author(s):  
Yu Hua Li ◽  
Hai Xiang Li ◽  
Yu Xing Liu ◽  
Jing Yun Chen
Keyword(s):  
Asphalt Concrete ◽  
Visual Inspection ◽  
Performance Test ◽  
Construction Process ◽  
Molding Method ◽  
Chip Seal ◽  
Sand Patch ◽  
Emulsified Asphalt ◽  
Cushion Layer

Chip seal is most frequently used as preventive maintenance (PM) treatments on asphalt pavement. However, it’s difficult to make the performance test of chip seal in laboratory. In this paper, the specimen molding method of chip seal is established in laboratory. Firstly, considering the structure and technique condition of the original pavement, a cushion layer of asphalt concrete (AC) is used as under layer of the specimen. Secondly, the construction process of chip seal is simulated in laboratory, which includes spraying emulsified asphalt and/or glass fiber, spreading aggregate, initial rolling and conservation, post-stage rolling and conservation in interval for some time. Lastly, visual inspection and sand patch test are used to evaluate the quality of the specimen. Research results show that the method of specimen molding and test in laboratory could relatively accurately simulate, evaluate and forecast the performance of the chip seal.

scholarly journals Experimental study of cooling tower performance using ceramic tile packing

2013 ◽  
Vol 7 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Ramkumar Ramkrishnan ◽  
Ragupathy Arumugam
Keyword(s):  
Experimental Study ◽  
Cooling Tower ◽  
Packing Material ◽  
Transfer Coefficients ◽  
Ceramic Tiles ◽  
Burnt Clay ◽  
Different Types ◽  
Roofing Material ◽  
Forced Draft

Deterioration of the packing material is a major problem in cooling towers. In this experimental study ceramic tiles were used as a packing material. The packing material is a long life burnt clay, which is normally used as a roofing material. It prevents a common problem of the cooling tower resulting from corrosion and water quality of the tower. In this study, we investigate the use of three different types of ceramic packings and evaluate their heat and mass transfer coefficients. A simple comparison of packing behaviour is performed with all three types of packing materials. The experimental study was conducted in a forced draft cooling tower. The variations in many variables, which affect the tower efficiency, are described.

scholarly journals THE RISKS AND LIABILITY OF PARTICIPANTS OF A CONSTRUCTION PROCESS FOR DEFECTS OF BUILDING PRODUCTS

2004 ◽  
Vol 10 (3) ◽  
pp. 109-115 ◽  
Author(s):  
Sigitas Mitkus
Keyword(s):  
Construction Projects ◽  
Building Materials ◽  
Legal Regulation ◽  
The Other ◽  
Construction Process ◽  
Building Products ◽  
Construction Contracts ◽  
And Behavior ◽  
Mutual Agreement

Sharing of the risk and liability is one of the most important functions of construction contracts. Proper sharing of the risks and liability between the parties of construction contract has a rather big influence on efficiency, quality, and probability of arising disputes between the parties of construction contract in construction projects. A lot of risk exists during the fulfillment of construction projects. One of those risks is the risk of defects of building products. The question of the liability of the parties of construction contract for inappropriate quality of the construction production caused by a bad quality of building products mainly depends on sharing of the risk of defects of building materials in the construction contract. Some aspects of the mentioned risk and liability of the parties of the construction contract might be set by mutual agreement in the construction contract. The other aspects are regulated by imperative norms of the law and the parties of construction contract have not a right to change those imperative conditions of sharing of risks and liability. The article deals with sharing of risk and liability for supplying building products of an improper quality for construction, taking in to account conditions of construction contract, legal regulation and behavior of parties of a construction contract. A tree of forming the alternatives of liability is presented in the article. Liability for supply of defected building products arises not only for parties of a construction contract. The producer (supplier) of building products is responsible for this as well. Variations of liability of the producer (supplier) depending on construction contract conditions are analyzed. A matrix of liability of the producer (supplier) of building products is presented in the article.

scholarly journals Rock characterization for the foundation of two water reservoirs using geophysical and borehole data

2016 ◽  
Vol 47 (3) ◽  
pp. 1345
Author(s):  
A. Vafidis ◽  
A. Andronikidis ◽  
H. Hamdan ◽  
G. Kritikakis ◽  
N. Economou ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Seismic Refraction ◽  
Water Reservoirs ◽  
Power Station ◽  
Borehole Data ◽  
Electrical Tomography ◽  
Hybrid Power ◽  
Rock Characterization ◽  
Deep Fracture

In this work, we present the results of a geophysical survey at Malia, Crete, Greece. This survey combines VES, electrical tomography and seismic refraction at two sites where equal number of water reservoirs is planned to be constructed for the needs of a hybrid power station using wind-hydro pumping renewable energy. The geophysical sections are interpreted using geological and borehole data. This survey determines the thickness of the overburden, defines the quality of the carbonate bedrock, detects faults   and weathered zones in carbonates. One major very low resistivity anomaly was detected at the northern investigated area, which corresponds to completely fractured or weathered limestone, while a 25m deep fracture zone, was detected at the southern investigated area.

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