Experimental Research on Using Heat Shrinkable Material to Protect Prestressed Anchor

2011 ◽  
Vol 90-93 ◽  
pp. 999-1004
Author(s):  
Li Zhu ◽  
Tian Xing Cheng ◽  
Er Yu Zhu ◽  
Xiao Yin Lv ◽  
Yong Zheng Zhou
Keyword(s):  
Experimental Research ◽  
Low Cost ◽  
Electrical Insulation ◽  
Construction Technology ◽  
Force Transmission ◽  
Construction Period ◽  
Advanced Method ◽  
National Patent ◽  
Prestressed Anchor ◽  
Normal Performance

nchor is the key component for force transmission of prestressed structure. It is difficult for the current sealing technology of anchor to ensure the normal performance of strand. And it will directly affect the bearing capacity and durability of the whole prestressed structure. The advanced method abroad smears anti-corrosion grease at the end of anchor, and then covers it with plastic cap. Based on the national patent: the method of using heat shrinkable material to protect prestressed anchor(patent number: ZL200710304303.2), some experiments of using heat shrinkable material to protect anchor are carried out, such as the construction technology verification, the electrical insulation and the sealing experiment, and anti-stripping experiment. The results show that the method of using heat shrinkable material to protect anchor has the advantages of simple and reliable construction technology, short construction period, low cost, good electrical insulation, high sealing property and anti-stripping strength. This method can protect the anchor of prestressed system very well, and has wide application value.

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.

Improved Method Based on Fluid Mechanics Analysis for Buoy Gauge Design and Experimental Research

2012 ◽  
Vol 163 ◽  
pp. 133-137
Author(s):  
Ao Yu Chen ◽  
Xu Dong Pan ◽  
Guang Lin Wang
Keyword(s):  
Fluid Mechanics ◽  
Experimental Research ◽  
Traditional Method ◽  
New Method ◽  
Improved Method ◽  
Advanced Method ◽  
Inner Surface ◽  
Mechanics Analysis ◽  
Linear Property

Traditional method of buoy gauge design is rather complicated, so an advanced method by building and solving fluid mechanics equations is proposed in this paper. The curve of the taper pipe inner surface is calculated, according to different buoy gravity and diameter. In order to examine the effect of this improved method, an experiment is carried out. Results show that linear property of the buoy gauge improved by new method is excellent.

scholarly journals Mine surveying technique and steel storage tank base deformation removal

2021 ◽  
Vol 1 (7) ◽  
pp. 69-79
Author(s):  
Aleksandr I. Barulin ◽  
Keyword(s):  
Low Cost ◽  
Operating Time ◽  
Construction Period ◽  
Steel Tank ◽  
Steel Tanks ◽  
Algebraic Actions ◽  
Minimum Height ◽  
Survey Accuracy ◽  
Tank Bottom ◽  
Mine Surveying

Introduction. Vertical steel tanks are extensively used in oil fields to hold crude oil and other liquids. Their construction requires continuous surveying control. However, measurement procedures, data processing, and deviations and documentation correction are not universal and cannot be applied for tanks with a capacity of less than 3000 m3. Moreover, the process of correcting the detected bottom irregularities is poorly substantiated and intuitive. Research objective is to improve the as-built survey accuracy and reliability of the low-capacity steel tank bottom, substantiate the minimum height of its irregularities, increase the objectivity and productivity of measurement processing, develop an unambiguous method for time-predictable correction of bottom irregularities, and substantiate the optimal contents of its relief’s as-built scheme. Methods of research. Geometric leveling for the bottom profile survey failed to provide adequate accuracy and was therefore replaced by the method of trigonometric leveling. A method has been developed for determining the deviations of the existent tank bottom profile from the design position by means of algebraic actions with surfaces of a topographic order. The accuracy of determining the smallest height of bottom irregularities has been estimated under the tacheometric survey. A method has been proposed for controlling the correction of tank bottom irregularities based on evaluation calculations of bottom deformations by the finite element method. Research results. All the development results are exemplified by a specific production example. It was found that for a full completion of work, two iterations of tank bottom irregularities correction are enough. Methods of optimal design for the facility’s as-built schemes are presented. Conclusions. A simple, accurate, low-cost, productive, and time-predictable method of mine surveying, mathematical processing and correction of deviations in the tank bottom profile has been developed. This technique reduces the construction period and increases the operating time of the facility.

Research on Application of Traffic Signs in Rural Highway Security Engineering

2013 ◽  
Vol 361-363 ◽  
pp. 2315-2320
Author(s):  
Shi Long Liu ◽  
Zhi Dong Guo ◽  
Miao Dong
Keyword(s):  
Low Cost ◽  
Control Points ◽  
Quality Inspection ◽  
Construction Technology ◽  
Traffic Signs ◽  
Security Engineering ◽  
Technology Analysis ◽  
Safety Effect ◽  
Research On Application ◽  
Rural Highway

Traffic signs are widely used in rural highway security engineering due to low cost, strong directive performance. The paper conducts the research and discussion combined with the design principles, control points of construction technology, analysis of quality inspection and evaluation and analysis on safety effect of traffic signs in the security engineering of Cai-Gou road. This paper provides references for the implementation of security engineering principles which is safe, effective, economic, practical.

The Application of New High-Strength Polyester Fiber Flexible Net for the End Coal Mining Through

2013 ◽  
Vol 750-752 ◽  
pp. 2141-2144
Author(s):  
Qi Tao Duan ◽  
Guo Yin Shang ◽  
Zhu He Xu ◽  
Xi Wen Zhang
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Cutting Speed ◽  
High Strength ◽  
Mining Area ◽  
Polyester Fiber ◽  
Construction Technology ◽  
Metal Mesh ◽  
Working Face ◽  
Mesh Material

Shendong mining area hanging nets adopted metal mesh material in the traditional through of fully mechanized coal face. Whose defects were the high cost of materials, process cumbersome, great labor intensity and time consuming. Therefore, new high-strength polyester fiber flexible mesh material was introduced. Its main advantages are: light weight, tensile resistance and drag force strong, flame-retardant and anti-static, low cost, simple process, high efficiency, coal cutting speed. The construction technology process in detail were designed which contained flexible network transported, fixed, dropped and raised. The project was implemented in Shigetai Coal at the end of No.12401 mining face. Results show that from working face mounting network to smoothly through with only 40 hours, compared with the traditional metal net can save 44 hours and cost 480000 yuan.

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.

Research on the Disposal for Fly Ash Weak Foundation by Spraying Powder Pile

2011 ◽  
Vol 71-78 ◽  
pp. 3785-3788
Author(s):  
Jian Wei Zhang ◽  
Min Jie Zhu ◽  
Li Wei Zhang
Keyword(s):  
Fly Ash ◽  
Environmental Pollution ◽  
Low Cost ◽  
Limited Liability ◽  
Construction Technology ◽  
Limited Liability Company ◽  
Technical Application

This paper studies the technical application of the disposal for FA(fly ash) weak foundation of these abandoned fly ash pool by the construction technology of spraying powder pile, so that, not only these abandoned fly ash pool will be used effectively as soon as possible, but also the surrounding environmental pollution will be improved well. The construction technology of reinforcement weak foundation is efficient, low cost and no pollution. In order to argue it, this paper will discuss the mechanism and feasibility of the construction technology based on first phase project of Xinmei car limited liability company.

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.

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