Construction method and structure for heightening core wall dam into concrete faced rockfill dam in combination with toe board foundation treatment
A technology for face rockfill dam and core wall dam, which is applied in infrastructure engineering, dams, barrages, etc., can solve problems such as the inability of reservoirs to meet water supply requirements and the danger of earth-rock dams, so as to reduce uneven settlement and improve deformation modulus. and bearing capacity, the effect of ensuring safety
Pending Publication Date: 2021-12-24
POWERCHINA HUADONG ENG COPORATION LTD
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Problems solved by technology
With the development of our country's economy and society, the water consumption of many towns and villages has increased significantly, and some reservoirs built in the last century can no longer meet the water supply requirements; in addition, many earth-rock dams built in the early days have suffered from dangerous problems
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[0022] Such as Figure 1 to Figure 6 As shown, this embodiment is a method and structure for raising a core wall dam combined with plinth foundation treatment to a face rockfill dam, which not only saves the investment for raising the dam, but also does not affect the normal operation of the original reservoir. The main features of this embodiment are: the thickening and heightening of the rockfill dam body is carried out on the downstream side of the original dam body 1, so that the centerline of the finished face rockfill dam is at the downstream of the centerline of the original dam body 1, and the centerline of the original dam body 1 The core wall 2 is the concrete anti-seepage wall for the face rockfill dam that is finally built, the crest structure 4 of the original dam body is removed, and the concrete toe slab of the face rockfill dam is poured on the top of the original dam body with the crest structure removed 6. The concrete anti-seepage wall 7 is connected to the ...
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The invention provides a construction method and structure for heightening a core wall dam into a concrete faced rockfill dam in combination with toe board foundation treatment. A heightened rockfill dam body is arranged on the downstream side of an original dam body of the core wall dam; the center line of the built concrete faced rockfill dam is located on the downstream side of the center line of the original dam body; a concrete anti-seepage wall is arranged on a core wall portion of the original dam body for the concrete faced rockfill dam; a dam crest structure of the original dam body is dismantled; a concrete toe board of the concrete faced rockfill dam is poured on the top of the original dam body without the dam crest structure; the concrete anti-seepage wall is connected with a toe board through a connecting board, and the toe board is connected with a panel, so that a complete anti-seepage system is formed; and moreover, multiple rows of concrete piles are arranged on the downstream portion of the concrete anti-seepage wall and below the toe board and the connecting board, and the lengths of the concrete piles are sequentially decreased in the downstream direction. On the premise of ensuring the safety of the dam, the investment for heightening the dam is saved, and the normal operation of an original reservoir is not influenced.
Description
technical field [0001] The invention relates to a method and structure for heightening a core wall dam combined with plinth foundation treatment into a face rockfill dam, which is suitable for the design and construction of the heightening of old dams in water conservancy and hydropower projects. Background technique [0002] From the 1950s to the 1970s, a large number of earth-rock dams were built in my country to solve irrigation and water supply in rural areas and cities. With the development of my country's economy and society, the water consumption of many towns and villages has increased significantly, and some reservoirs built in the last century can no longer meet the water supply requirements; in addition, many earth-rock dams built in the early days have suffered from dangerous problems. Some old dams need to be heightened in order to meet the increasing demand for water supply, or to strengthen the old dams at the same time. Among the large number of earth-rock d...
Claims
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Login to View More IPC IPC(8): E02B7/06E02D27/40
CPCE02B7/06E02D27/40
Inventor 赖道平孙来徐建荣彭育蒋明
Owner POWERCHINA HUADONG ENG COPORATION LTD