Arch dam mass concrete crack control method

A large-volume concrete and control method technology, applied in arch dams, dams, buildings, etc., can solve problems such as cracks in large-volume concrete of dams, achieve the effects of accelerating flow speed, improving heat transfer efficiency, and delaying heat loss

Active Publication Date: 2022-01-07
SHANDONG WATER GENERAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to improve the problem of cracks in dam mass concrete, this application provides a method for controlling cracks in arch dam mass concrete

Method used

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  • Arch dam mass concrete crack control method
  • Arch dam mass concrete crack control method
  • Arch dam mass concrete crack control method

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Experimental program
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Effect test

Embodiment 2

[0064] refer to Figure 7 , the difference between this embodiment and Embodiment 1 is that the secondary pipe 2 in this embodiment includes two secondary pipe joints, the retaining edge 40 is arranged at one end of the secondary pipe joint, and the two secondary pipe joints are far away from the retaining edge 40 A rubber hose 42 is connected between one end of the two.

[0065] The implementation principle of Embodiment 2 is as follows: first install the two auxiliary pipe joints on the corresponding connectors 33, and then use the rubber hose 42 to connect the two auxiliary pipe joints; the auxiliary pipe joints of different lengths can be selected to change the concrete interior. The heat dissipation area is large enough to meet the heat dissipation requirements of different volumes of concrete. The shape and length of the auxiliary pipe 4 are easy to adjust. The rubber hose 42 is easy to obtain materials and has good bending performance.

Embodiment 3

[0067] refer to Figure 8 The difference between this embodiment and Embodiment 2 is that, in this embodiment, a metal bellows 43 is connected between the ends of the two auxiliary pipe joints away from the retaining edge 40 .

[0068] The implementation principle of Embodiment 3 is as follows: first install two auxiliary pipe joints on the corresponding connectors 33, and then use metal bellows 43 to connect the two auxiliary pipe joints; the auxiliary pipe joints of different lengths can be selected, thereby changing the concrete interior. The heat dissipation area is large enough to meet the heat dissipation requirements of different volumes of concrete. The shape and length of the auxiliary pipe 4 are easy to adjust. The metal bellows 43 is easy to obtain materials and has good bending performance.

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Abstract

The invention relates to the technical field of concrete construction, in particular to an arch dam mass concrete crack control method. The arch dam mass concrete crack control method comprises the following steps of erecting a formwork: erecting the formwork according to design requirements; binding reinforcing steel bars: binding the reinforcing steel bars required in mass concrete according to design requirements; installing heat removal pipelines: fixing a plurality of heat removal pipelines to the reinforcing steel bars side by side, wherein the ends of the heat removal pipelines are exposed out of the concrete surface; pouring concrete: pumping the concrete into the formwork, and vibrating to be compact; maintaining, covering a thermal insulation layer, and injecting water into the heat removal pipelines; and blocking the heat removal pipelines, and injecting cement mortar into the heat removal pipelines, wherein the heat removal pipelines include a main pipe, a connecting pipe and an auxiliary pipe. The arch dam mass concrete crack control method has the effect of improving the problem of cracks generated by the dam mass concrete.

Description

technical field [0001] The present application relates to the field of concrete construction technology, in particular to a method for controlling cracks in mass concrete of an arch dam. Background technique [0002] Mass concrete generally refers to the mass concrete whose minimum geometric dimension of the concrete structure is not less than 1m, or the concrete that is expected to cause harmful cracks due to temperature changes and shrinkage caused by the hydration of the cementitious material in the concrete. [0003] A common problem in mass concrete construction is concrete cracking. There are many reasons for concrete cracking, the main one of which is the heat of hydration factor. During the hydration process of cement, a large amount of heat will be generated after a chemical reaction. Because of the small surface coefficient of the concrete structure, when the heat of hydration of the cement is continuously generated, a large amount of heat will accumulate inside th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/12E02D15/02
CPCE02B7/12E02D15/02
Inventor 孟天琦罗卫群张修凯
Owner SHANDONG WATER GENERAL CO LTD
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