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Artificial short-seam structure of rolled concrete arch dam

A roller compacted concrete, artificial technology, applied in the direction of arch dams, dams, etc., can solve the problems of penetrating cracks, damage to the integrity of arch dams, etc., and achieve the effect of speeding up the pouring progress

Inactive Publication Date: 2002-02-20
TSINGHUA UNIV
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Problems solved by technology

[0004] In South Africa, two RCC gravity arch dams were built in 1988 and 1990 (the 50-meter-high Kwalport dam and the 70-meter-high Ullevidans dam), which were poured from the whole warehouse without transverse joints. , the temperature-induced slit arrangement is as follows figure 1 As shown

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  • Artificial short-seam structure of rolled concrete arch dam
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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0022] The artificial short joint structure of the roller compacted concrete arch dam proposed by the present invention is as follows: figure 2 As shown in the figure, artificial creases 211 and 212 are set at the left and right abutments of the arch dam, with a radial length of 1.0 m to 1.5 m, generally not exceeding 1 / 4 of the dam thickness, so as not to increase the shear stress of the abutment. The crease angle θ is about 30-60°, and the crease length is similar to the radial direction. Set water stops 231 and 232 on the upstream surface of the artificial crease, set drain pipes 241 and 242 in the seam, and arrange grouting pipes and grouting boxes 251 and 252 at the edge of the seam, so that grouting can be performed after the concrete on the upstream dam surface cools down. connected into a whole. Crack stop materials 261 and 262 are ...

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Abstract

The present invention relates to rolled concente arch dam artificial short seam structure, which includes artificial folding seam set on left and right dam shoulder of rolled concrete arch dam; water stopping, water draining and grouting systems are set water stopping, water draining and grouting systems are set in the seam, seam end has anticracking material; arch crown at down stream of arch dam is set ortificial radial short seam, seam end has anticracking material. The present invention can effectively release temperature stress of large surface rolled concrete during dam construction, temperature drop tensile stress of arch dam during operation and water load tensile stressk, if grouting is applied to dam shoulder artificial folding seam at the end of construction, it can improve the stability of dam seat.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, in particular to the structural design of a roller compacted concrete arch dam. Background technique [0002] The arch dam is an overall statically indeterminate structure fixed on the foundation rock mass. After the concrete is poured, the internal temperature of the concrete rises in the early stage, and the surface heat dissipation temperature is low. The temperature difference between the inside and outside forms the surface temperature difference tensile stress. The upstream surface of the abutment and the downstream surface of the arch crown produce a large temperature tensile stress, and the water load of the reservoir will also increase the tensile stress on the upstream surface of the abutment. When the tensile stress caused by temperature and water load exceeds the tensile strength of concrete Cracks will appear in the dam body, destroying the integrity of the arch...

Claims

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Application Information

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IPC IPC(8): E02B7/12
Inventor 刘光廷张富德谢树南李鹏辉陈凤岐
Owner TSINGHUA UNIV
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