01 The determination of pile location is commonly known as “pile delivery”, which means that the tower location coordinates and pile location are delivered to the construction unit by the design unit
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The construction unit shall carry out follow-up re survey according to the pile position
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02 Construction resurvey, commonly known as “resurvey”, refers to the repeated survey conducted by the construction unit according to the site pile position to verify whether the coordinates, span, corner, elevation and other information of the design drawings are accurate
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If there is any difference, it is necessary to contact the design department to verify the reason for the difference
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construction 03 The land acquisition of tower foundation is commonly known as “green compensation”, which means that the construction unit or construction unit solicits the consent of the land owner of the tower location and pays the compensation fee
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Note: the construction of overhead power line corridor (including pole and tower foundation) and underground cable passage shall not be subject to land acquisition, and the power facilities construction unit shall give one-time compensation to the owner of land contract management right or the owner of construction land use right of the land for pole and tower foundation
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Farmer 04 Foundation pit division is commonly known as “pit division”, which refers to the location and elevation of four foundations set out by the construction unit according to the angle degree of tower position and foundation root opening
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05 Foundation excavation, commonly known as “excavation”, refers to the excavation after the construction unit determines the location of four foundations
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As it is an underground project, safety measures must be taken
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In recent years, several personal safety accidents occurred in line construction, and the proportion of foundation excavation is very high! 05 Steel bar binding is commonly known as “steel bar binding”, which refers to the construction unit’s welding and binding of steel bars according to the design drawings
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According to different functions, foundation reinforcement can be divided into stress reinforcement, distribution reinforcement and structural reinforcement
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Load bearing reinforcement: reinforcement resisting bending moment, shear force, torque, tension and pressure; Distributed reinforcement: the reinforcement supporting and fixing the stressed reinforcement, and the reinforcement not stressed by itself; Structural reinforcement: it is determined according to the structure and experience, mainly playing the role of tie, maintenance, reinforcement, etc
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06 Pouring concrete is commonly known as “pouring concrete”, and it is better to finish pouring continuously at one time
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In this way, the integrity of concrete is good, and the quality of concrete can meet the design requirements
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Otherwise, hehe, three or four kinds of pile service! 07 Foundation maintenance is commonly known as “maintenance”, which means that the construction unit should cover and moisturize the concrete within 12 hours after pouring
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Ordinary portland cement concrete shall not be less than 7 days and nights
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08 Tower material transportation is commonly known as “transporting tower materials”
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Tower materials located on the flat ground and close to the road can be transported by vehicles
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However, tower materials located in mountainous areas can only be carried by horses and mules in bundles, which is very difficult
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09 Tower erection is commonly known as “erecting tower”
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The principle of tower erection is that the tower legs and other parts close to the ground are assembled first, then a holding pole is fixed on the ground, and the tower materials are lifted by holding pole, pulley and winch to continue to be assembled upward
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Then continue to move the derrick upward and repeat the above operation until the assembly is completed
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The above figure shows the basic tower erection process 10 The principle of setting out the conductor and ground wire is as follows: because the conductor is too heavy to spread from one tower to another, the method of “small towing large” is adopted
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First, a thin and light guide rope is put by the UAV or power umbrella, and then the guide rope is used to tow the traction rope and the traction rope is used to tow the conductor with the help of the pulley installed on each tower, So as to complete the setting out
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The above picture shows the UAV laying guide line 11 The stringing of conductor and ground wire is commonly known as “stringing”
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The stringing and stringing of conductor and ground wire are not the same step
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Stringing is to put the conductor and ground wire in the past; Tightening is to tighten the conductor and ground wire according to the design requirements
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Because the tightness of the ground wire is related to the sag, the tightening of the ground wire is actually to adjust the sag of the ground wire! Pay attention to the tension and monitoring when tightening the line
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If it is too tight, the line may be broken and the tower may collapse! twelve Accessories installation accessories installation mainly refers to: tension string, suspension string, jumper string and other hardware string installation
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Installation of damper, spacer and other anti vibration equipment
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Fault location, video monitoring and other monitoring equipment installation
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At this stage, we will see the dawn of victory! twelve The following tests shall be carried out for the project of overhead transmission line after passing the completion acceptance: (1) measuring the insulation resistance of the line（ 2) Check the phase of the line（ 3) Measurement of line parameters and high frequency characteristics（ 4) The voltage increases from zero to rated voltage, but it can not be done if there is no condition（ 5) Switch on the line with rated voltage for three times（ 6) Test run with load for 24 hours
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13 successfully put into production, see rainbow after storm! This article refers to: transmission line workers commonly used technical manual (a very good technical manual)
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This article is authorized to transfer from @ transmission line,
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