Temperature control anti-cracking method for lower adit of high-pressure water channel
A high-pressure waterway, temperature control and anti-cracking technology, which is applied in hydropower, water conservancy projects, hydropower stations, etc., can solve the problem of small cement consumption, rapid temperature rise of cement insulation, and the temperature control and anti-cracking measures of concrete dams are not suitable for high-pressure waterways Issues such as Xiapingdong
Inactive Publication Date: 2022-01-07
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
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Problems solved by technology
[0003] Due to the structural characteristics of the high-pressure channel lower tunnel in the water delivery system of the energy storage power station, the wall thickness of the tunnel is only 1-2 meters. The rapid temperature rise of adiabatic leads to a more prominent problem of cracking of the flat tunnel wall under the high-pressure waterway!
[0004] Although, in actual engineering, temperature control and anti-cracking measures similar to concrete dams have been taken for the poured high-pressure waterway tunnel, but because the wall thickness of the high-pressure waterway tunnel is only 1-2 meters, and the concrete dam The wall thickness is tens of meters, and the difference between the two wall thicknesses is tens of orders of magnitude. Therefore, the conventional temperature control and anti-cracking measures for concrete dams are not suitable for flat tunnels in high-pressure waterways.
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[0056] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that various modifications can be made to the embodiments disclosed herein, therefore, the embodiments disclosed in the specification should not be regarded as limitations on the present invention, but only as examples of embodiments, and its purpose is to make the present invention The features of the invention are self-evident.
[0057] figure 1 It is a schematic diagram of the three-dimensional structure of the flat tunnel under the high-pressure waterway, figure 2 It is the front view of the flat tunnel under the high-pressure waterway. Such as figure 1 , figure 2 As shown, usually, the length of the flat tunnel under the high-pressure waterway of the large and medium-sized energy storage power station water delivery system is roughly 300m-400m, and the thickness of the tunnel wall is about 1 meter. Compared with the concrete ...
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The invention provides a temperature control anti-cracking method for a lower adit of a high-pressure water channel. The method comprises the following steps of: pouring in sections; paving a cooling water pipe at a position which is 1 / 2 of the thickness of the wall of the lower adit; strictly controlling the pouring temperature of concrete; performing water cooling in a dynamically regulated water cooling mode; and after the dynamic water cooling is finished, covering a heat-insulating layer on the surface of the wall of the adit. If necessary, spraying / sprinkling auxiliary cooling is performed during water cooling. As proved by tests, the wall of the lower adit of a water delivery tunnel can be effectively prevented from cracking.
Description
technical field [0001] The invention relates to a temperature-controlled crack prevention method, in particular to a temperature-controlled crack prevention method for a flat tunnel under a high-pressure waterway. Background technique [0002] my country has a vast territory, numerous rivers and lakes, and abundant water resources. In order to make full use of these water resources, many pumped storage power stations have been built in our south. For a medium-sized or larger pumped storage power station, its main building generally includes a concrete dam, a water delivery system, an underground powerhouse, and a powerhouse volute. For the water delivery system of a pumped-storage power station, it mainly includes a high-pressure water delivery tunnel, and the high-pressure water delivery tunnel also includes a high-pressure channel lower level tunnel, diversion branch pipes, water diversion branch pipes and tailwater branch pipes, except for water diversion branch pipes and...
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IPC IPC(8): E02B9/06E02B9/00E02D15/02G06F30/20G06F119/08
CPCE02B9/06E02B9/00E02D15/02G06F30/20G06F2119/08Y02E10/20
Inventor 刘力捷王振红焦石磊汪娟姚礼敏肖俊齐春雨金鑫鑫杨永森辛建达李辉侯文倩赵一鸣史倬宇张步
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES