Study on Dam Construction Technology without Foundation

2012 ◽  
Vol 170-173 ◽  
pp. 1903-1906
Author(s):  
Hong Xia Wang ◽  
Ya Hui Gao
Keyword(s):  
High Pressure ◽  
Dam Construction ◽  
Construction Technology ◽  
Construction Period ◽  
Speed Up

In the impervious system of dam construction technology without foundation and the cofferdam, the cut-off wall, seepage curtain or high-pressure jet, oblique wall, etc. do not exist. It does not require pumping pit and need a lot of pit excavation. the technology can save a lot of investment and greatly speed up the construction speed, shorten the construction period. To study dam construction technology without foundation, the method is technically feasible, and no adverse consequences, completely meet the project needs.

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.

Design Analysis of Shallow Embedded Column Foot of Reactive Powder Concrete Pole

2013 ◽  
Vol 459 ◽  
pp. 582-588
Author(s):  
Yu Zhuo Jia ◽  
Xin Min Yu ◽  
Liang Zhang
Keyword(s):  
Transmission Lines ◽  
Working Condition ◽  
Simulation Analysis ◽  
Reactive Powder Concrete ◽  
Construction Technology ◽  
Operation Condition ◽  
Element Analysis ◽  
Construction Period ◽  
Reactive Powder ◽  
Ansys Workbench

According to the existing specifications, design shallow embedded column foot of 500kV self-supporting partially prestressed reactive powder concrete pole, and perform numerical simulation of column foot stress under actual working condition by using finite element analysis software ANSYS WORKBENCH. Results show that the mechanical characteristic of shallow embedded column foot is good. It can well transmit larger axial pressure, pulling resistance and horizontal force generated by top load of RPC pole. Through the simulation analysis we found that shallow embedded column foot has high safety reliable degree under operation condition, can be used in the current 500 kV transmission lines; In terms of construction technology performance, construction of shallow embedded column foot is simple and quick, can effectively reduce the complexity of construction, shorten the construction period.

Numerical Simulation of Expansion Effect of MgO Concrete

2012 ◽  
Vol 212-213 ◽  
pp. 801-804 ◽  
Author(s):  
Jian Hua Cui ◽  
Han Jiang Xiao ◽  
Jie Su
Keyword(s):  
Numerical Simulation ◽  
Temperature Control ◽  
Temperature Drop ◽  
Dam Construction ◽  
Construction Technology ◽  
3D Fem ◽  
Fem Method ◽  
Good For ◽  
Mgo Concrete ◽  
Expansion Effect

The expansion effect of the MgO concrete must meet the requirement of the design for the temperature control. In this paper, its influence to the construction stress is studied using 3D FEM method. Results show that the expansion of MgO at later age is good for compensating the shrinkage induced by temperature drop and the expansion of MgO can improve the stress status in the constrained zones but may worsen the stress status in other zones. This provides the reference for popularizing dam construction technology with MgO concrete.

Research on Construction Technology of Inclined Pylon of Single Pylon Cable-Stayed Bridge without Backstays

2011 ◽  
Vol 90-93 ◽  
pp. 1168-1172
Author(s):  
Ying Lei Zhu
Keyword(s):  
Computational Model ◽  
Henan Province ◽  
Construction Technology ◽  
Box Girder ◽  
Construction Period ◽  
Cable Stayed Bridge ◽  
New Type ◽  
Complex Construction ◽  
Longitudinal Cracks ◽  
Selection Of

A new type of cable-stayed bridge, single pylon cable-stayed bridge without backstays is used in the Zhenshui Road Bridge in Xinmi City, China’s Henan Province, which adopts PC box girder with corrugated steel webs. It has many advantages such as light girder deadweight, low pylon height and avoiding webs longitudinal cracks. This novel bridge is adopted firstly in China. Cast-in-place method with bracket is used in the construction of the bridge’s inclined pylon because of its complex construction technology and tight construction period. In this paper, interests are focus on the scheme comparison and selection of bracket construction, the establishment of bracket’s computational model and the result of numeric analysis etc. The chief aim of this investigation was provides useful reference and enlightenment to similar bridge types.

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 Research on the Factors of Extremely Short Construction Period under the Sufficient Resources based on Grey- DEMATEL-ISM

2021 ◽  
Author(s):  
Jun-long Peng ◽  
Chao Peng ◽  
Meng-yao Wang ◽  
Ke Hu ◽  
Du-bin Wu
Keyword(s):  
Influencing Factors ◽  
Construction Projects ◽  
Process Model ◽  
Technology Policy ◽  
Grey System Theory ◽  
Construction Technology ◽  
Grey System ◽  
Five Dimensions ◽  
Factors Affecting ◽  
Construction Period

Abstract Under the condition of sufficient resources, there are many factors affecting the realization of extremely short construction period of engineering construction projects. Based on literature review and questionnaire survey, this paper firstly selected 17 influencing factors from the five dimensions of design, management, technology, policy and environment. And the factor analytic hierarchy process model was established based on Grey-DEMATEL-ISM. The model introduced the improved grey system theory and combined decision-making trial and evaluation laboratory (DEMATEL) with interpretative structural modeling method (ISM). In addition, the model can not only identify the critical factors in the system, but also present the internal logical relationship between the influencing factors through the multi-level hierarchical structure diagram. Finally, through the analysis of the influencing factors of extremely short construction period under the sufficient resources, it defined that the key factor is construction technology and the secondary factor is construction safety organization. The research results provide a theoretical basis for managers to realize the extremely short construction period under the sufficient resources.

scholarly journals Research status and trend of comprehensive technology for Multi-storey transportation hub construction

2021 ◽  
Vol 248 ◽  
pp. 03063
Author(s):  
Shi Jing-xian
Keyword(s):  
High Speed ◽  
Great Difficulty ◽  
Construction Technology ◽  
Transportation Industry ◽  
Application Research ◽  
Construction Period ◽  
Research Status ◽  
Construction Organization ◽  
At Home

With the development of China's transportation industry, a lot of expressways have been built, and Multi-storey transportation hubs are built for the interchange of high-speed. Due to the limitation of terrain and traffic, there are many spans in the interchange Multi-storey transportation hub, which has a tight construction period and a great difficulty in construction organization. This paper first sorts out the development and research of comprehensive technology of Multi-storey transportation hub construction at home and abroad, and then analyzes and summarizes the research of Multi-storey transportation hub construction at present, the application research of Swivel Construction Technology in hub project, and the application status of BIM Technology in Multi-storey transportation hub project.

scholarly journals Discussion on Anti-seepage Wall and Anti-seepage Technology of Water Conservancy Project

2020 ◽  
Vol 4 (5) ◽  
Author(s):  
Jie Tao ◽  
Qingpo Wang
Keyword(s):  
High Pressure ◽  
Structural Changes ◽  
Water Infiltration ◽  
Construction Technology ◽  
Quality And Safety ◽  
Jet Grouting ◽  
Common Problems ◽  
Water Conservancy Project ◽  
Water Conservancy ◽  
Wall Construction

The water infiltration problem of water conservancy projects is one of the more common problems in the construction of water conservancy projects, which seriously affects the overall construction quality and safety of water conservancy projects. This article studies the causes of water infiltration in water conservancy projects and introduces related anti-seepage technologies, hoping to be a reference for the implementation of anti-seepage projects. Through research, it is found that the factors that cause water infiltration in water conservancy projects include water conservancy project structural changes, environmental factors and construction factors. Relevant personnel can use concrete anti-seepage wall construction technology and high-pressure jet grouting technology to do the relevant anti-seepage work of water conservancy projects.

Construction Technology Research on Revolving Conical Pullout Anchor

2016 ◽  
Vol 858 ◽  
pp. 10-14
Author(s):  
Jun Chao Ma ◽  
Cheng Bin Yang ◽  
Hong Ming Yu
Keyword(s):  
Reference Values ◽  
Fine Aggregate ◽  
Construction Technology ◽  
Technology Research ◽  
Pullout Capacity ◽  
Aggregate Concrete ◽  
Construction Period ◽  
Anchor Cable ◽  
Drilling Pipe ◽  
Prestressed Anchor

To solve the anti-float problems of underground buildings (structures) more economically, environmentally and effectively. The paper putted forward a construction technology of revolving conical pullout anchors based on researching and improving to the traditional pullout measures. That was a method that the conical anchor head was installed on the drilling pipe and screwed into the stable soil under the influence of drilling pipe. When pulling the drilling pipe, the fine aggregate concrete were poured into the edge. Furthermore, prestressed anchor cable should be strained which connected with the anchor head to keep a good connect with the beam so that it could improve pullout capacity. The conundrums of long construction period and high cost had effectively solved. This technique also had provided great reference values for the congener construction.

Research on High-Pressure Hose Knitting Machine Knowledge Modeling Based on Ontology

2012 ◽  
Vol 482-484 ◽  
pp. 2535-2538
Author(s):  
Liang Wang ◽  
Xi Wei Wang ◽  
Xi Jing Wang
Keyword(s):  
High Pressure ◽  
Knowledge Management ◽  
Knowledge Sharing ◽  
Product Design ◽  
Technical Support ◽  
Manufacturing Industries ◽  
Knowledge Modeling ◽  
Knowledge Model ◽  
Organization And Management ◽  
Speed Up

In view of knowledge management problems for the manufacturing industries , this paper presents an approach of knowledge organization and management based on ontology. Knowledge model of high-pressure hose knitting machine is completed by the use of ontology modularization technology and ontology integration technology.It achieves a greater range of knowledge sharing and reusing ,provides a technical support for the enterprise to speed up product design , and has a certain significance on knowledge accumulations and innovations of manufacturers.

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