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Transition layer structure of rockfill concrete gravity dam and construction method thereof

A technology of rockfill concrete and transition layer, which is applied in the direction of gravity dams, dams, barrages, etc., can solve the problems of high flatness of the rockfill surface, insufficient refinement, hidden dangers of anti-sliding and stability of the dam layer, etc., to achieve convenient construction, The effect of improving the anti-skid stability

Pending Publication Date: 2020-09-08
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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Problems solved by technology

During the construction process, the surface of the normal concrete cushion at the bottom of the dam body and the surface of the rockfill often have surface-to-surface contact due to insufficient construction refinement and too high flatness of the rockfill surface, so self-compacting concrete cannot flow into the surface As a result, the contact surface cannot provide shear resistance, which greatly weakens the shear resistance parameters of the joint layer of normal concrete cushion and rockfill concrete, and poses a great hidden danger to the anti-sliding stability of the dam layer

Method used

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  • Transition layer structure of rockfill concrete gravity dam and construction method thereof
  • Transition layer structure of rockfill concrete gravity dam and construction method thereof
  • Transition layer structure of rockfill concrete gravity dam and construction method thereof

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Such as Figure 1-3 Shown, the present invention is implemented like this: pouring normal concrete cushion 3 on the dam base surface of rockfill concrete gravity dam and after doing artificial chiseling or high-pressure water gun roughening treatment on its surface, treat that the normal concrete 3 of dam body cushion reaches The strength is required in the design. On the normal concrete 3 of the cushion of the dam body, the rockfill 16 is piled up in separate warehouses. It is required that the size of the pre-stacked stone warehouse surface 10 should not be too large, and should be less than 100m 2 After the pre-stacked stone storehouse surface 10 has completed the stacking of the rockfill-6, pour 30cm thick normal concrete 8 on the pre-stacked stone storehouse surface 10; Finally, mechanically supplemented by manual methods, the con...

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Abstract

The invention discloses a transition layer structure of a rockfill concrete gravity dam and a construction method thereof. The transition layer structure comprises rockfill concrete inside a dam bodyand normal concrete of a dam body cushion, the normal concrete of the dam body cushion is arranged below the rockfill concrete inside the dam body, and a transition layer is arranged between the rockfill concrete inside the dam body and the normal concrete of the dam body cushion; an upstream face impervious layer is arranged on the upstream face of the rockfill concrete inside the dam body; the rockfill concrete inside the dam body is composed of rockfill II and self-compacting concrete; and the transition layer is composed of rockfill I and the normal concrete. Due to the adoption of the transition layer, the phenomenon of surface contact between the surface of cushion layer concrete and the surface of the rockfill is effectively avoided, and the anti-sliding stability of the dam body atthe transition layer is significantly improved.

Description

technical field [0001] The invention relates to a transition layer structure and a construction method of a rock-fill concrete gravity dam, and belongs to the technical field of rock-fill concrete gravity dams. Background technique [0002] Rockfill concrete is a new type of concrete proposed by Tsinghua University. It is formed by randomly filling self-compacting concrete in a large-sized rockfill by utilizing the characteristics of high flow, good separation resistance and self-flow of self-compacting concrete. concrete rockfill. For example, in the prior art, the utility model patent CN210013190U applied by the Zunyi Water Conservancy and Hydropower Survey and Design Research Institute discloses a rock-fill concrete stacking structure and a rock-fill concrete dam body, which relates to the technical field of rock-fill concrete dam body filling construction in water conservancy and hydropower projects The invention solves the technical problem that the surface of the rock...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/06E02B7/10E02B7/00
CPCE02B7/06E02B7/10E02B7/00
Inventor 王志强张文毅邹建锋荆珑张镯
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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