Construction method for changing angle-steel tower foundation in 220KV strain original rod position
A construction method and the technology of angle steel towers, which are applied in the direction of basic structure engineering and construction, can solve the problems of increasing the cost of renovation projects, occupying temporary sites, and unable to repair the land, so as to achieve reliable foundation excavation and facilitate construction management and safety management , easy-to-grasp effect
Active Publication Date: 2010-11-17
STATE GRID CORP OF CHINA +1
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Problems solved by technology
[0004] The reconstruction technology of the original tower follows the conventional method, the tower needs to occupy new land, the old tower needs to be demolished, and the construction process will also occupy the land. At the same time, the demolished tower will also cause construction waste. Temporary site, therefore, needs to increase the cost in the renovation project
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[0020] Such as figure 2 Take this as an example to illustrate the dimensions of the new angle steel tower foundation. figure 2 A and B are the basic distances respectively, L is the diagonal distance, and θ / ζ is the actual turning angle of the line.
[0021] Such as figure 1 , The construction method for replacing the angle steel tower foundation with the original pole position of 220KV tensile strength of the present invention includes the following steps:
[0022] (1) According to the position of the tensile cement pole 2, using the central pile auxiliary line extension principle, the central pile auxiliary line of the new angle steel tower is determined under the condition that the original line pole position remains unchanged. It is designed in accordance with industry standards and according to the direction of the conductor 7. Determine the turning angle (θ / ζ) of the wire to determine the tower type used, and determine the position and center of the foundation 3 of the fou...
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The invention relates to a construction method for replacing the angle steel tower foundation at a 220KV tension resistant original pole position, which comprises the following steps: (1) according to the tension resistant cement pole position, the central pile auxiliary line of a new tower is determined by following the central pile auxiliary line extension principle with the original line pole position unchanged, and then the foundation positions and centers of the four towers of the new angle steel tower are determined according to the used tower model; (2) a temporary balanced guy anchor is arranged on the tension resistant cement pole ground, and the tension resistant cement pole is reinforced by a temporary guy; (3) the new tower foundation is dug and cast according to the foundation positions of the four towers of the new angle steel tower. The invention is simple, easy to be operated and mastered; the construction method is safe, the foundation digging is reliable, the original line pole position is unchanged, which makes sure the foundation stability of the original cement pole, ensures the power supply reliability of the line, and minimizes the problem of long-termed line restructuring and power off caused by steel tower replacement, long time of foundation construction and cast-in-place concrete maintenance.
Description
Technical field [0001] The invention belongs to the method of overhauling and transforming the transmission line of the electric power project, and adopts the original line pole tower position and the walking pole tower foundation to construct various straight line and tensile angle steel tower foundation construction methods. Background technique [0002] Due to the changes in the strength of the line poles and towers, the mechanical force that bears the cross-section of the conductors, and various ground-to-ground, cross-over and other technical requirements, with the development of the local national economy and the continuous development of urban and rural construction, as well as the development of social economy, The performance of the pole and tower can no longer meet the requirements of safety, economy and normal operation. As the basic industry of the national economy, the power grid must first develop. The main equipment in the power grid is composed of transmission li...
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IPC IPC(8): E02D27/42
Inventor 孙学锋赵延华颜炳辉韩进新周勇钱冰
Owner STATE GRID CORP OF CHINA