Lattice Slope Foundation-Cantilever Structure Complex Road for the Roadway Widening in Steep-Sloped Mountainous Areas

2011 ◽  
Vol 255-260 ◽  
pp. 3272-3276
Author(s):  
Liang Fan ◽  
Zhi Xiang Zhou
Keyword(s):  
Lower Cost ◽  
Engineering Application ◽  
Road Construction ◽  
Geological Condition ◽  
Construction Technology ◽  
Side Slope ◽  
Cantilever Structure ◽  
Environmental Effectiveness ◽  
Simple Slope ◽  
Road Widening

In view of good geological condition non-cliff side slope road widening or new road construction, after contrasting and analyzing the characteristics of widening pattern of roads that have been built, lattice slope foundation cantilever structure complex road is proposed. Using slope foundation column which is casted depending on hillside, its top connect with deck of bridge supporting on the cantilever beam ,thus forms the flank roadway structure. This complex road can avoid deep-digging and high filling, lower construction cost.The construction method is simple, slope is also stable. Moreover, in the course of road widening, vehicle traffic will basically not be affected. In this paper, the method of construction technology, working principles, engineering application and economic, technical efficiency and environmental effectiveness have been analyzed, it shows that in road widening under appropriate condition, this method is safe and reliable, can significantly simplify the process, lower cost, and also maximize the protection of natural ecological environment.

Strategies for Promoting the Use of Concrete Pavements in Tanzania: Technical and Institutional Considerations

2008 ◽  
Vol 31 (1) ◽  
pp. 53-62
Author(s):  
D.A. Mfinanga ◽  
H. Bwire
Keyword(s):  
Road Construction ◽  
Cost Effective ◽  
Petroleum Products ◽  
Concrete Pavements ◽  
Construction Technology ◽  
The Road ◽  
Competing Demands ◽  
Resource Requirements ◽  
On The Road ◽  
Economic Developments

High-type roads in Tanzania have been predominantly of asphaltic concrete construction. This ever enlarging and ageing asphaltic road network represents increasing resource requirements on the road agency in the form of maintenance. Limited resources coupled with the ever sky-rocketing costs of petroleum products and the competing demands of social economic developments, presupposes the need to look for alternative road construction technology that is more cost-effective and resource optimising. Experience gained from developed and some developing countries where concrete pavements have been widely used suggests the potential of this type of pavement in many developingcountries. This paper discusses the technical aspects of design and construction- and maintenance-related aspects of concrete pavements. The discussion extends further to highlight issues pertaining to the performance of concrete pavements and strategies for promoting the use of concrete pavements in Tanzania. Conclusions and recommendationsare made with suggestions on how to start implementing the proposed strategies.

High Pressure Rotary Jet Grouting Pile with Undrained Caisson Combined Construction Technology on Nearby Yangtze River Levee Protection

2013 ◽  
Vol 718-720 ◽  
pp. 1938-1944
Author(s):  
You Sheng Zhao ◽  
Bin Zhou
Keyword(s):  
High Pressure ◽  
Yangtze River ◽  
Engineering Application ◽  
Reference Value ◽  
Construction Technology ◽  
The Yangtze River ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Jet Grouting

t is easy to cause the Yangtze River embankment soil of slip even collapse to have a deep foundation pit construction adjacent to the Yangtze River outsideembankment,there are a lot of risk. In this paper, a new combining technique of construction for large caisson is presented. Based on the construction environment, theconstructiontechnology,the smaller earthwork excavation of deep high pressure rotary jet grouting pile with undrained caisson combined construction technology combined with monitoring data for the open caisson excavation control is adopted. It has achieved relatively good results and summarized the advantages of deep high pressure rotary jet grouting pile with undrained caisson combined construction technology in engineering application owing the reference value for engineering applications.

The Exploration and Application of Underwater Shaped Charge Blasting Circuit in Reef Engineering

2012 ◽  
Vol 256-259 ◽  
pp. 1975-1979
Author(s):  
Shou Feng Chen ◽  
Dian Shu Liu ◽  
Qing Cheng Zhang ◽  
De Hu Gan
Keyword(s):  
Engineering Application ◽  
Shaped Charge ◽  
Construction Technology ◽  
Network Connection ◽  
Detonation Tube

According to the reef blasting environment characteristics and shape charge blasting construction technology requirement, we design a set of electric detonator - detonating cord - unconductance detonation tube detonator network. Introducing the engineering application of three kinds of network connection mode, the craft is simple, the operation is convenient, safe and reliable. It has reference and application value in the similar engineering.

Design and Application of the Butt Auxiliary Device for the Erection of Steel Tower Using Helicopter

2013 ◽  
Vol 387 ◽  
pp. 319-322
Author(s):  
Yong Jun Xia ◽  
Qian Miao ◽  
Ke Xin Huang
Keyword(s):  
Transmission Line ◽  
Simple Structure ◽  
Engineering Application ◽  
Vertical Direction ◽  
Horizontal Direction ◽  
Construction Technology ◽  
Overhead Transmission Line ◽  
Auxiliary Device ◽  
Design And Application

The erection construction technology of steel tower of overhead transmission line using helicopter has higher requirements to the butt auxiliary device. According to the GE1 steel tower of the QingZang AC/DC interconnection project Geermu converter station earthling line, the butt auxiliary device is developed. The butt auxiliary device includes a guiding device, horizontal-direction caging device and vertical-direction caging device and solve the problems as follows limiting in air, docking, perching and temporary supporting. The successful engineering application show that the butt auxiliary device is safety and reliable and has perfect function, simple structure and convenient installing and removing. This provides reference for the design of the butt auxiliary device to other types steel tower of transmission line.

On the Construction Technology and Quality Control of Vacuum Combined Surcharge to Foundation Reinforcement

2014 ◽  
Vol 1030-1032 ◽  
pp. 827-829 ◽  
Author(s):  
Ze Jun Liu ◽  
Ya Guo ◽  
Qi Wang Yuan ◽  
Bao Hai Chen ◽  
Xiang Yang Gu ◽  
...  
Keyword(s):  
Soft Soil ◽  
Soft Clay ◽  
Engineering Application ◽  
Economic Benefits ◽  
Engineering Practice ◽  
Strengthening Effect ◽  
Construction Technology ◽  
Soil Consolidation ◽  
Vacuum Preloading ◽  
Soft Clay Subgrade

The vast area of distribution of soft clay with poor engineering property of our country, on the soft clay subgrade treatment by drainage consolidation method. As a kind of drainage consolidation method, vacuum preloading consolidation of soft soil foundation in recent years have been widely used, and achieved very good engineering and economic benefits. The theory research about vacuum preloading behind the engineering practice, restricted the further development of the technology and engineering application, it is necessary to make a systematic study. Through the comparative analysis of the test results, the vacuum causes soil consolidation, on this basis, the surcharge preloading and vacuum preloading contrast of the vacuum preloading mechanism, analyzes various factors foundation reinforcement finally strengthening effect by vacuum preloading.

Application of High Pressure Jet Grouting Pile with Undrained Open Caisson Combined Construction Technology in the Protection of Yangtze River Levee

2013 ◽  
Vol 368-370 ◽  
pp. 1443-1449
Author(s):  
Jun Yang Wei ◽  
Bao Tian Wang ◽  
Jing Hua Zhang ◽  
Bin Zhou
Keyword(s):  
High Pressure ◽  
Yangtze River ◽  
Engineering Application ◽  
Construction Technology ◽  
Deep Foundation ◽  
Effective Protection ◽  
Foundation Pit ◽  
Construction Technique ◽  
Deep Foundation Pit ◽  
Jet Grouting

It is easy to cause Yangtze River embankment soil slip or even collapse to have a deep foundation pit construction adjacent to Yangtze River outside embankment，with lots of risk . A new combined construction technique for large caisson is presented. The construction technology, the earthwork excavation of deep high pressure jet grouting pile combined with undrained open caisson construction technology, with data monitoring for the open caisson excavation control is adopted. This study mainly summarizes the advantages of deep high pressure jet grouting pile combined with undrained caisson combined construction technology engineering application, and describes the process of the combined construction and measures of deviation correction.The new combining construction technique has made a relatively effective protection for the Yangtze River levee and its ecological environment,having great engineering application value to some similar engineering.

scholarly journals Study on Road Construction Technology of Low-lying and Swamp Area by Using Special Fine Sand

2020 ◽  
Vol 2 (1) ◽  
pp. 26
Author(s):  
Zheng Wu ◽  
Fei Yang ◽  
Ke Lee
Keyword(s):  
Quality Control ◽  
Road Construction ◽  
Fine Sand ◽  
Construction Technology ◽  
Site Condition ◽  
Construction Technique ◽  
Supporting System ◽  
Construction Techniques

According to the site condition of one of the oversea project located in the low-lying and swamp area, special fine sand with fine modulus in values of 0.42-0.62 was used to construct roads in the area through special workmanship and construction techniques. Bamboo materials are designed as piles and supporting system in a reasonable arrangement. The paper provides calculation details of the supporting system of bamboo materials, outlines the construction procedures and construction technique, and describes the contents of quality control and safety construction. It provides good references for road construction in low-lying and swamp areas in similar countries.

scholarly journals Innovation and Practice of Cable-Pylon Anchorage Zone Using Group Aggregated Anchor System

2021 ◽  
Keyword(s):  
Yangtze River ◽  
Engineering Application ◽  
Social Needs ◽  
Steel Beams ◽  
Engineering Practice ◽  
Construction Technology ◽  
Force Transmission ◽  
Anchor System ◽  
Cable Stayed Bridge ◽  
Anchorage System

Abstract: With the development of the cable-stayed bridge, the anchorage form on pylon of cable-stayed has been improved and innovated continuously, and the anchorage methods such as circumferential prestressed anchorage, steel anchor beam and steel anchor box have been gradually formed and developed, which further increases the span of cable-stayed bridge and meets the social needs of economic development and environmental integration. The group aggregated anchorage system between cable and pylon is a kind of anchorage form outside the pylon, which has the characteristics of clear force transmission, simple structure and high construction efficiency. It has been successfully applied in Chizhou Yangtze River Bridge for the first time. The main span of Chizhou Yangtze River Bridge is 828m, and the cable-stayed bridge with spatial cable plane of two towers is constructed. Six steel beams are deployed between tower legs to anchor 54 pairs of cables respectively. The steel beams and the concrete tower columns are effectively connected by prestressed anchors, shear nails and short steel bars, which could transfer the cable force to the tower column reliably. This kind of anchoring system has clear force transmission, which could reduce the tensile stress of concrete tower column and the risk of concrete cracking. Meanwhile, the steel beam could be constructed by the engineering manufacture and the field installation, which could reduce the working time at height, further the construction quality and safety could be controlled. Based on the construction of Chizhou Yangtze River Bridge, this paper mainly introduces the proposal, construction, key construction technology and engineering application effect of group aggregated anchorage system. The engineering practice proves that this new type of anchorage could not only meet the basic requirements of the intrinsic safety of the bridge, but integrate with the regional culture to create the beauty of natural harmony as well.

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