DECISION ANALYSIS FOR NEW CONSTRUCTION TECHNOLOGY IMPLEMENTATION

1995 ◽  
Vol 12 (1) ◽  
pp. 67-82 ◽  
Author(s):  
LI-CHUNG CHAO ◽  
MIROSLAW J. SKIBNIEWSKI
Keyword(s):  
Decision Analysis ◽  
Technology Implementation ◽  
Construction Technology ◽  
New Construction

scholarly journals Optimal Design and Practice of the Construction Scheme for Laying the Whole Track Bed on the Subway Ballastless Track

2020 ◽  
Vol 165 ◽  
pp. 04003
Author(s):  
Chen Hui ◽  
Qi zhenfang
Keyword(s):  
Construction Industry ◽  
Modern Society ◽  
Rail Transit ◽  
Construction Technology ◽  
Ballastless Track ◽  
Construction Scheme ◽  
New Construction ◽  
Design And Practice ◽  
Stable Development ◽  
Modern Building

In the development of modern society, our country attaches more importance to the development of the construction industry, and strengthens the supervision, so that the construction industry can be developed to the mode of industrialization. That combining with the construction needs of prefabricated concrete assembly in our country and taking comprehensive analysis of various factors and application, can enhance the structural stability and safety of prefabricated concrete assembly, thus can meet the needs of the modern building industrialization development, and improve the overall quality and efficiency. In the development of subway transportation field, laying the whole track bed of Ballastless track is an important core work, which is the new construction of rail transit. This paper made perfect management system, carried out all kinds of work, improved the construction technology of the whole track bed and perfected the construction plan, with the result of prolonging the service life of the subway ballastless track and promoting the stable development of modern society in our country.

scholarly journals New Construction Technology of a Shallow Tunnel in Boulder-Cobble Mixed Grounds

2020 ◽  
Vol 2020 ◽  
pp. 1-20 ◽  
Author(s):  
Tong Liu ◽  
Yujian Zhong ◽  
Zhihua Feng ◽  
Wei Xu ◽  
Feiting Song ◽  
...  
Keyword(s):  
Surrounding Rock ◽  
Construction Technology ◽  
Construction Process ◽  
Tunnel Excavation ◽  
Supporting System ◽  
Highway Tunnel ◽  
Bulk Medium ◽  
New Construction ◽  
Secondary Lining ◽  
Design And Construction

As a typical granular bulk medium, problems are common in boulder-cobble mixed grounds, such as easy collapse and instability and difficult effective support for large-section tunnel excavation. Tunnels constructed in BCM grounds are rare still, and there is a big gap between the design and construction of tunnels. Based on the Nianggaicun highway tunnel crossing the BCM grounds, the construction technology of tunnel in BCM grounds is studied by means of literature investigation and field survey. Here are the main conclusions: the overall deformation of surrounding rock is quite small; the pressure distribution of surrounding rock is small and loose pressure is dominant, and the safety reserve of secondary lining is large. The deformation process of surrounding rock concentrates on the construction stage. During the construction process, there are many problems, such as serious overexcavation, difficulty of bolt penetration, and continuous rock fall. In this paper, a three-bench complementary cyclic excavation method is proposed, which replaces the original CD and CRD methods. Meanwhile, the supporting system is optimized. The results show that the disturbance of surrounding rock is reduced, while the safety of construction process and the reliability of structure are increased. The new excavation method and optimized supporting system are expected to fill the gap between design and construction of tunnel in BCM grounds and provide reference for construction of such tunnels in the future.

New Technology of Installing the Attached Self-Climbing Tower Steel Gantry Cranes

2014 ◽  
Vol 484-485 ◽  
pp. 245-253
Author(s):  
Ming Guang ◽  
Hong Sheng Li ◽  
Hua Guo Yang
Keyword(s):  
New Technology ◽  
Plate Thickness ◽  
Gantry Crane ◽  
Maximum Height ◽  
Construction Technology ◽  
Pipe Segment ◽  
New Construction ◽  
Girder Bridge ◽  
Gantry Cranes ◽  
Bridge Tower

The Liujiaxia Bridge is 536 m span steel truss stiffening Girder Bridge, tower with double-column steel concrete structure, which is the world's largest diameter, the largest steel plate thickness of concrete pylon. Sarasota manufactured using standard pipe segment, group fight scene segment piecewise hoisting tower segment perfusion within the micro-expansion concrete construction technology, tower maximum height of 61.5 meters. This paper describes a piecewise Sarasota steel installation, piecewise perfusion within the micro-expansion concrete tower new construction method - attached to a self-climbing tower bridge gantry crane mounted pylon construction technology of large steel components. Of the "entity attached to the pylon installation of equipment by section climb" design, composition and construction applications are described in detail.

scholarly journals Cognition, Application and Discussion on Shaped Charge Hydraulic Smooth Blasting Technology

2021 ◽  
Vol 4 (2) ◽  
pp. 5
Author(s):  
Xiuyong Ni ◽  
Suqin Han ◽  
Peng Li ◽  
Xiwu Wei
Keyword(s):  
Comprehensive Evaluation ◽  
New Technology ◽  
Construction Technology ◽  
Tunnel Excavation ◽  
Main Method ◽  
Excavation Process ◽  
New Construction ◽  
China Railway ◽  
Operation Cycle ◽  
Smooth Blasting

In the past, the main method of tunnel excavation in China was drilling and blasting, but the biggest shortcoming of the traditional drilling and blasting method is that it is easy to cause serious overexcavation and underexcavation. At the same time, the operation cycle time of this method is long, which leads to a serious waste of resources. Not only that, a large number of toxic gases and dust produced after blasting also do harm to the health of construction workers. So this is an urgent need for a new construction technology to solve this worldwide problem. In this situation, the leading experts in the field of tunnel, "The survey and design master of China" Shi Yuxin, Liu Pei, and well known expert in explosion field, yan-sheng ding, professor Chen Chengguang and Gu Yicheng, the experts group, cooperate with The Fifth Branch of China Railway 18th Bureau in northwest project management department, developed a new technology. This technology has passed the appraisal of scientific and technological achievements organized by Tianjin Science and Technology Commission, which is shaped hydraulic smooth blasting technology. The comprehensive evaluation of the technology is "international leading" level.This paper is mainly aimed at the drawbacks of drilling and blasting construction,combined with the author's cognition and discussion on the introduction of the new technology of cumulative hydraulic blasting and the practical application effect in the tunnel excavation process of the fourth company of China Railway 14th Bureau Group in the second division of the 9th bid section of Zhangjihuai Railway in Huainan Province.

Study on Schedule Control in AP1000 Nuclear Plant Project

2010 ◽  
Author(s):  
Xiaopeng Fang
Keyword(s):  
Nuclear Power ◽  
Construction Technology ◽  
Construction Project Management ◽  
Modular Construction ◽  
Schedule Control ◽  
Schedule Management ◽  
Construction Techniques ◽  
New Construction ◽  
Construction Schedule ◽  
Parallel Construction

The construction of AP1000 Nuclear Power Plant (NPP) has commenced in China. The AP1000 NPP features a passive design concept and modular construction technology. Based on the management of the construction of current AP1000 NNP, this paper describes the effects on Nuclear Island (NI) construction project management resulting from modular construction technology, as well as new construction techniques and methods. This paper puts forward new requirements for construction schedule management of the nuclear island construction at different levels. The AP1000 NI construction logic features the parallel construction of civil and structural erection as the main approach, with the integrated schedule of module fabrication, assembly and installation as support.

Achievement and Future Prospects of ICT Construction in Japan

2016 ◽  
Vol 28 (2) ◽  
pp. 123-128 ◽  
Author(s):  
Kazuyoshi Tateyama ◽  
Keyword(s):  
Population Projections ◽  
Tax Revenue ◽  
Construction Technology ◽  
Future Prospects ◽  
Budget Cuts ◽  
Promising Tool ◽  
Complex Projects ◽  
Severe Reduction ◽  
New Construction ◽  
Construction Model

[abstFig src='/00280002/02.jpg' width=""300"" text='Unmanned construction system' ]Population projections for Japan suggest that the production-age population, ages 15 to 64, will be 70% or less in 2045 than that of today. In the field of construction, such rapid reductions in the production-age population will bring about a severe reduction in the number of workers as well as budget cuts in infrastructure investment due to the decrease of tax revenue. At the same time, infrastructure, which has already been constructed, is now due for maintenance and approaching its renewal dates. Therefore, the task of stably providing infrastructure for society into the future will be more difficult than ever. In the field of construction, more complex projects will have to be carried out with limited manpower and budgets. This problem will be addressed, not by an extension of existing means, but by innovations in construction technology. ICT (Intelligent Construction Technology) is expected to be a promising tool to meet these future needs. This article discusses current conditions and future prospects for a new construction model utilizing ICT in Japan.

Exploration of Rotation Lowering with Building RC Box-Rib Arch Bridge

2013 ◽  
Vol 443 ◽  
pp. 100-104
Author(s):  
Rui Nong Zou ◽  
Jie Yang
Keyword(s):  
Wide Distribution ◽  
Small Range ◽  
Construction Technology ◽  
The Road ◽  
Deep Groove ◽  
New Construction ◽  
On The Road ◽  
Construction Operation ◽  
And Control ◽  
Vertical Casting

Arch rib construction of Zhenzhu Bridge on the road from Wuchuan to Pengshui in Guizhou uses construction technology of vertical casting in the first place, and then vertical rotation, and the total weight of which is 610t. This paper introduces technical points and process of vertical rotation construction, and has made beneficial exploration and summary of such kind of construction technology.OverviewBridge rotation construction has advantages including saving costs for hoisting and erecting frames, reducing risks of frames losing stability when casting arch rib concrete, convenient, flexible, safe, reliable and good integrated construction operation, structural line type and internal forces are easy to adjust and control, small range requirement of construction site, and low impact on surrounding environment. Bridge rotation construction would have a broad application prospect in the practice of bridge construction, especially in Chinas southwest area with wide distribution of deep groove and dangerous gully, such construction method is more advantageous. Therefore, practice and research on such construction technology are very practical and significant.Ordinary vertical rotation construction is to have low casting or arch rib assembling, and then lift upward to reach the designed location. Concrete arch rib construction of Zhenzhu Bridge on the road from Wuchuan to Pengshui in Guizhou uses the technology of negative-angle vertical rotation construction, vertical casting arch rib, and then lowering rotation with weight of 610t. Such construction technology is used in China for the first time, while current vertical rotation of the same type of RC arch rib in China has the maximum weight. Based on emphasis on introducing construction technology characteristics of this bridge, this paper also includes innovation and beneficial exploration on the new construction technology of negative-angle vertical rotation.

scholarly journals Improving the Efficiency of Combination of Construction and Installation Works During the Underground Phase Under Conditions of Compacted Construction

2021 ◽  
pp. 59-68
Author(s):  
A. V Radkevych ◽  
M. I Netesa ◽  
A. M Netesa
Keyword(s):  
Construction Projects ◽  
Construction Equipment ◽  
Maximum Height ◽  
Construction Technology ◽  
Critical Elements ◽  
Limited Space ◽  
New Construction ◽  
Technological Documentation ◽  
Phase Arrangement ◽  
Main Construction

Purpose. The urbanization development in the twenty-first century is characterized by increasing the share of multifunctional infrastructure complexes among the total volume of new and renovated construction. Projects with a developed stylobate part are characterized by significant demand, as well as placing parking lots in the space of underground floors. Such solutions make it possible to effectively use the underground space while minimizing the filling of 1–5 floors. The latter requirement is typical for the construction of historic centers, where urban restrictions regulate the maximum height of the building. The research is aimed at increasing the efficiency of works provided they are combined during the arrangement of underground phase of multifunctional complexes, which are built in the historic part of cities, in a densely built-up area and extremely limited space. Methodology. The authors reviewed the world experience in the installation of multifunctional complexes and introduced best practices in organizational and technological solutions during the development of design and technological documentation for the arrangement of underground phase of the object «New construction of a multifunctional complex with parking at 25 Volodymyra Vernadskoho Street, Dnipro.» The main construction processes of the underground phase arrangement in difficult conditions of compacted construction are considered and the critical elements during their design are determined. The technological sequence of performing related works by various contractors has been improved in order to create a time reserve and increase the reliability of the entire technological process. Findings. Organizational and technological solutions have been identified that allow combining construction and installation processes of underground phase of multifunctional complexes with a significant number of subcontractors under conditions of compacted construction, as well as under complex hydrogeological conditions or during construction in the historic buildings of the central part of cities. Originality. The authors for the first time conducted research in the field of underground phase arrangement given the location of construction equipment in the limited space of the construction site in the historic part of Dnipro and proposed a number of solutions to increase the reliability of the main construction process. Practical value. Based on the results obtained, one can correct the location of construction equipment and determine the rational sequence of construction and installation works, as well as predict the further development of construction technology. These studies can be useful during the study of disciplines «Technology of Construction Production», «Technology of special works», for the organization of scientific and practical seminars, refresher courses and more.

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