Concrete pouring construction method for high pouring strength dam
A construction method and concrete technology, which is applied in construction, water conservancy engineering, sea area engineering, etc., can solve the problem of difficulty in meeting the construction strength, process and quality requirements of high pouring strength dam pouring, slow concrete siloing speed, increased temperature cracks, etc. problems, to achieve the effect of improving pouring quality, improving pouring efficiency, and reducing cracks
Active Publication Date: 2016-06-08
CHINA THREE GORGES CORPORATION
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Problems solved by technology
However, the current dam concrete construction methods are difficult to effectively solve the above problems. There are serious problems such as high temperature rise during concrete transportation, serious separation of aggregates, and slow concrete warehousing speed, etc., resulting in low pouring efficiency and even increased temperature cracks.
[0005] It can be seen that traditional pouring methods have been difficult to meet the requirements of pouring construction strength, technology and quality of high pouring strength dams, so major improvements must be made in existing concrete construction methods
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[0042] Figure 1 to Figure 3 A preferred embodiment of the concrete pouring construction method of a high pouring strength dam according to the present invention is shown, and schematic diagrams of the layout of dam sections are shown respectively.
[0043] As shown in the figure, in the initial stage of construction, a trestle bridge track 6-1 is arranged on the upstream and downstream of the dam along the direction of the dam body, and a plurality of portal cranes 6 are arranged on the trestle bridge track 6-1. The base of the dam is poured. At this time, the strength of single-machine pouring is preferably 85-95m 3 / h;
[0044] Arrange multiple tower belt conveyors 5 along the direction of the dam body on the base of the dam, the working radius of each tower belt conveyor 5 is 40-55m, and any two adjacent tower belt conveyors 5 have partially overlapping pouring areas , the length of the partially overlapping pouring area along the dam body is 15m-20m; each tower belt mac...
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The invention relates to a concrete pouring construction method for a high pouring strength dam. At the initial stage of construction, a trestle track is arranged on the upstream and downstream of the dam along the direction of the dam body; Tower belt machine; when pouring the dam body, two pendulum-type cable cranes are installed directly above the dam body; after the dam body is poured, the dam body An elevated trestle track is arranged at a downstream elevation of 50m, and a tower belt machine and a door crane are installed on the downstream side elevated trestle track; after the dam body is poured, the elevated trestle is moved to the required elevation and reinstalled to meet the requirements of the dam. Body pouring; when pouring the top area of the dam, concrete is poured into each bin number arranged on the top area of the dam by the tower conveyor. The construction method can improve the concrete pouring construction efficiency of the high pouring strength dam and the mechanical layout of the construction site, greatly reduce the construction cost, and improve the pouring quality.
Description
technical field [0001] The invention relates to a high-strength concrete pouring construction method for a water conservancy and hydropower project dam, in particular to a concrete pouring construction method for a high pouring strength dam. Background technique [0002] Generally speaking, concrete pouring construction tasks are very heavy in the construction process of large-scale water conservancy and hydropower projects, and the annual pouring intensity exceeds 4 million m 3 For high pouring strength dams, the amount of concrete construction is even greater, and during the pouring construction process, the strength is high, the duration is long, there are many cross operations, and the technology is difficult. In addition, the grade and gradation type of the concrete used for pouring There are many, which increase the complexity and difficulty of construction. [0003] Currently, existing water conservancy and hydropower dam pouring methods mainly use construction metho...
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IPC IPC(8): E02D15/02E02B7/00
Inventor 曹广晶戴会超张曙光胡兴娥陈先明高兴杰
Owner CHINA THREE GORGES CORPORATION