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Roller compacted concrete gravity dam keyway type kerf structure and construction method thereof

A technology of roller compacted concrete and gravity dam, applied in gravity dam, dam and other directions, can solve the problems of large engineering investment, long construction period, difficult grouting system layout, etc., to save engineering investment, simplify construction, and solve connection problems. Effect

Active Publication Date: 2011-05-04
POWERCHINA HUADONG ENG COPORATION LTD
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Problems solved by technology

Considering the construction technology and characteristics of roller compacted concrete, such as grouting the transverse joints, the arrangement of the grouting system is very difficult, and the concrete needs to be cooled by water in the second stage before the transverse joints are grouted to make the concrete reach a stable temperature, so the construction period is relatively short Long, the corresponding project investment is relatively large

Method used

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  • Roller compacted concrete gravity dam keyway type kerf structure and construction method thereof
  • Roller compacted concrete gravity dam keyway type kerf structure and construction method thereof

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Embodiment Construction

[0014] As shown in Fig. 1, this embodiment has a slit 1, which is characterized in that the slit 1 is a broken line-shaped keyway. In this example, the slit 1 is a trapezoidal keyway with a bottom angle a of 30 degrees. The thickness h of the keyway is 50cm. To facilitate construction, the bottom width of the keyway is an integer multiple of the length of the cutting blade, and is greater than 3m but less than 5m. The slit 1 is embedded with 2-4 layers of chemical fiber woven cloth.

[0015] In order to prevent irregular cracks in the direction of the keyway after slitting, crack limiting steel bars 2 are arranged on both sides of the corners of the slit 1, using structural reinforcement, with a diameter of 25mm and an anchoring length of 80-120cm, arranged at intervals on the pouring level.

[0016] The keyway cut joint structure of RCC gravity dam adopts the construction method of first rolling and then cutting, including the following steps:

[0017] a. Lay crack-limited steel bar...

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Abstract

The invention relates to a roller compacted concrete gravity dam keyway type kerf structure and a construction method thereof. The technical problem to be solved by the invention is to provide a roller compacted concrete gravity dam keyway type kerf structure and a construction method thereof so as to improve the overall safety of a roller compacted concrete gravity dam, simplify the constructionand save project investment. The technical proposal for solving the problem is as follows: the roller compacted concrete gravity dam keyway type kerf structure has a keyway type kerf; and the roller compacted concrete gravity dam keyway type kerf structure is characterized in that: the keyway type kerf is a keyway in the form of a polygonal line; the keyway thickness h is between 40 and 60 cm, thekeyway bottom width is an integral multiple of the length of a cutting blade and is more than 3 m and less than 5 m, and 2-4 layers of chemical fiber braided cloth are embedded into the keyway type kerf. The roller compacted concrete gravity dam keyway type kerf structure is mainly applied to water conservancy and hydraulic power projects.

Description

Technical field [0001] The invention relates to a key slot type slit structure of a roller compacted concrete gravity dam and a construction method thereof. Mainly used in water conservancy and hydropower projects. Background technique [0002] The roller compacted concrete gravity dam has the characteristics of large warehouse surface rolling, continuous ascent and rapid construction. The distance between its transverse joints is generally 20-30m, which is linear layout, and uses a slitting machine to cut the seams on site. Some RCC gravity dams built in areas with high seismic intensity, or where the geological conditions of the dam foundation are quite different, or steep bank slopes, usually require grouting of the transverse joints to connect the dam as a whole. Taking into account the construction technology and characteristics of RCC, such as grouting for transverse joints, the layout of the grouting system is difficult, and the second-stage water cooling of the concrete ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B7/10
Inventor 叶建群涂祝明陈国良李健高雅芬吴伟伟王大胜
Owner POWERCHINA HUADONG ENG COPORATION LTD
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