Construction method of inclined column type corrosion resistant foundation for power line in salt lake area
A transmission line and foundation construction technology, which is applied in infrastructure engineering, protective devices, buildings, etc., can solve the problems of unfavorable high-quality and high-volume engineering, low soil structure strength, and large chloride ion content, and achieve enhanced lateral Anti-overturning and anti-sliding stability, improving the overall stress condition, and obvious economical effect
Active Publication Date: 2013-02-13
QINGHAI ELECTRIC POWER DESIGN INST +3
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Problems solved by technology
[0010] (2) The content of chloride ions is large, which belongs to strong saline soil and is highly corrosive;
[0011] (3) The soil structure strength is low, which belongs to weak foundation s
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Embodiment 1
[0055] The construction method of the inclined column foundation of the transmission line in the salt lake area of the present invention, its main construction process includes:
[0056] 1 basic positioning
[0057] According to the requirements of the design drawings, use precision measuring instruments and equipment such as levels, theodolites, total stations, vertical balls, and tower rulers to carry out line setting and positioning, and accurately determine the contour line and central axis of the foundation.
[0058] Excavation
[0059] Excavators are used for continuous excavation of the foundation pit. During the excavation process, the exposure time of the foundation pit should be shortened as much as possible and over-excavation is strictly prohibited. The safety status of the foundation pit should be monitored at any time to prevent casualties and injuries caused by the collapse of the foundation pit wall during the excavation process. The equipment is damaged...
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The invention relates to the technical field of power transmission, and particularly relates to a construction method of an inclined column type corrosion resistant foundation for a power line iron tower in a salt lake area. The construction method comprises the following steps of: 1) a foundation treating step; 2) a glass fiber reinforced plastic corrosion-resistant layer mounting step; 3) a steel foundation binding step; 4) a glass fiber reinforced plastic template supporting step; 5) a concreting step; 6) a glass fiber reinforced plastic sealing step; 7) a concrete maintaining and support structure removing step; and 8) a foundation pit backfilling step. The method provided by the invention is characterized in that compared with the conventional rigid straight column foundation, the center slope of the flexible-board inclined column type foundation is the same as the slope of major materials of tower legs of an upper power transmission line structure; as a result, the horizontal acting force on the top surface of the foundation and the bending moment acting on a foundation base plate are reduced, the integrated force condition of a main column and the base plate of the foundation is greatly improved, the lateral antidumping and anti-sliding stability of the foundation is enhanced, the designed dimension of the foundation is reduced and 5%-15% of concrete material quantity for a main foundation body is saved; and therefore, the economical efficiency is quite obvious; and the glass fiber reinforced plastic covered concrete foundation improves the corrosion resistance of the salt lake region. The schematic diagram of the construction method is shown in the following figure.
Description
technical field [0001] The invention relates to the technical field of electric power transmission, in particular to a salt lake area with special geological conditions such as strong corrosive saline soil, soft foundation soil, and high groundwater level, which is used for the construction of anti-corrosion foundation of transmission line iron tower inclined column in the salt lake area method. Background technique [0002] Characteristics of Transmission Lines in Salt Lake Area [0003] The design and construction of the foundation engineering of transmission lines in the power industry have obvious industry and regional characteristics. The construction of transmission lines in the salt lake area is faced with special geological conditions such as strong corrosive saline soil, weak foundation soil, and high groundwater level. [0004] Properties of Saline Soil in Salt Lake Area [0005] When the soluble salt content in the soil is greater than 0.3%, and has engineering ...
Claims
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Inventor 童武满银高伟斌谭青海郑卫峰龚兴国康建国李大成刘毅
Owner QINGHAI ELECTRIC POWER DESIGN INST
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