Determination of Cast-In Situ Section Lengths of Reinforced Concrete Arch Bridge in Arch Centering Method

2011 ◽  
Vol 243-249 ◽  
pp. 1935-1940 ◽  
Author(s):  
Shui Xing Zhou ◽  
Min Zhang ◽  
Bin Liu ◽  
Jun Xu
Keyword(s):  
Reinforced Concrete ◽  
Construction Method ◽  
New Method ◽  
Arch Bridge ◽  
Numerical Result ◽  
Influence Line ◽  
Deformation Law

It is a common construction method to pour arch concrete in arch centering. The deformation law of arch centering was analyzed in process of pouring arch concrete, a new method to determine concrete cast-in-situ section lengths and corresponding formulas which based on deformation scale of arch centering were presented. According to influence line of arch centering deflection, a program used to calculate cast lengths and arch centering deformations was developed. This program could automatically calculate each segment of arch concrete based on the assigned deformation conditions. A numerical result shows that when the arch centering deformation scale was taken as the target, deformation proportion caused by each segment of concrete should be controlled on 0.5-0.6.

A New Subway Station Construction Method: Top-Down Boring with Cast-In-Situ Arch

2014 ◽  
Vol 501-504 ◽  
pp. 1706-1710
Author(s):  
Mei Qun Huang ◽  
De Yun Ding ◽  
Xiu Ren Yang ◽  
Chen Wang
Keyword(s):  
Construction Method ◽  
New Method ◽  
Subway Station ◽  
Engineering Practice ◽  
Top Down ◽  
Underground Engineering ◽  
Urban Mass Transit ◽  
New Construction ◽  
Design Calculations

With the speedy development of urban mass transit in China, more and more building environment problems are coming forth in many cities. How to choose available construction method to fast, safely and economically build subway engineering is worthy to be urgently studied. A new-type subway station construction method called top-down boring with cast-in-situ arch is presented through a large number of design calculations, research and analysis, on the basis of conscientiously analyzing traditional tunneling methods and engineering practice. Some advantages of this new method are briefly introduced, compared with the shallow mining methods for underground engineering construction, as well as its application in subway engineering. According to further study, this new construction method will be widely used in underground engineering projects. At the same time, the relative theory of this new method will be validated and promoted.

Determination of Material Acoustic Features Using Small Samples

2014 ◽  
Vol 606 ◽  
pp. 111-114
Author(s):  
Jan Holub ◽  
Bastien Desbos ◽  
Vítězslav Vacek ◽  
Jiří Kolísko
Keyword(s):  
Signal Processing ◽  
New Method ◽  
Small Samples ◽  
Acoustic Absorption ◽  
Practical Consideration ◽  
Acoustic Features

A new method to determine acoustic absorption in-situ is described in this paper. For practical consideration, this measurement can be performed on small samples (square of 60x60cm). This paper describes all the steps needed to obtain results: device setup, recording, signal processing.

In situ determination of toughness indices of fibre reinforced concrete

2006 ◽  
Vol 39 (3) ◽  
pp. 283-290 ◽  
Author(s):  
P. Antonaci ◽  
P. Bocca ◽  
A. Grazzini
Keyword(s):  
Reinforced Concrete ◽  
Fibre Reinforced Concrete
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