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Horizontal construction joint of rockfill dam face and construction method of horizontal construction joint

A technology of horizontal construction joints and construction methods, applied in water conservancy projects, dams, barrages, etc., can solve problems such as construction joint opening and concrete damage, and achieve the effect of reducing the number and width

Inactive Publication Date: 2017-01-11
CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This traditional construction joint treatment method leaves a weak surface at the parting joint. When the panel is stressed, the normal shear force transmission and the panel bending internal force transmission are not coordinated between the two successively poured slabs, and the concrete at the joint surface is broken. Risk of shear failure, opening of construction joints when panels are bent

Method used

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  • Horizontal construction joint of rockfill dam face and construction method of horizontal construction joint
  • Horizontal construction joint of rockfill dam face and construction method of horizontal construction joint
  • Horizontal construction joint of rockfill dam face and construction method of horizontal construction joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A horizontal construction joint of a rockfill dam slab, comprising a pre-cast block 3 and a post-pour block 4, a cross-joint reinforcement bar 2 is arranged between the pre-pour block 3 and a post-pour block 4, and the two ends of the cross-joint reinforcement bar 2 are respectively arranged on the pre-pour Among the block 3 and the post-cast block 4, and the joint reinforcement 2 is perpendicular to the construction joint 1 formed by the pre-cast block 3 and the post-cast block 4.

[0027] In a preferred solution, the double-layer seam reinforcement 2 includes an upper layer seam reinforcement 2' and a lower layer seam reinforcement 2'', and the upper layer seam reinforcement 2' and the lower layer seam reinforcement 2'' are respectively combined to form an upper reinforcement mesh and the lower layer of steel mesh, the upper and lower layer of steel mesh are connected by connecting bars 5.

[0028] In the preferred scheme, the single-layer joint reinforcement 2 is loc...

Embodiment 2

[0030] On the basis of Example 1, the following methods are used to construct the horizontal construction joints of the face of the rockfill dam:

[0031] 1) 1) Calculate and determine the size and position of the construction joint between the first pouring block 3 and the subsequent pouring block 4, and the size of the mortar strip on the underlying layer of the panel;

[0032] 2) Lay the mortar, and set the PVC gasket on the laid mortar, and erect the side form at the horizontal construction joint of the first pouring block 3;

[0033] 3) Preset the cross-joint reinforcement 2 in the side formwork of the erected horizontal construction joint and use the slip form for concrete pouring. After the concrete pouring of block 3 is completed, remove the side formwork of the horizontal construction joint, and press Standardize chiseling treatment, and uninterrupted maintenance of the first pouring block 3;

[0034] 4) At least 20 days after the first pouring block 3 is poured, mos...

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Abstract

The invention discloses a horizontal construction joint of a rockfill dam face and a construction method of the horizontal construction joint. The horizontal construction joint comprises a primarily poured block and a secondarily poured block, wherein a joint-crossing steel bar is arranged between the primarily poured block and the secondarily poured block, two ends of the joint-crossing steel bar are arranged in the primarily poured block and the secondarily poured block respectively and is perpendicular to a construction joint formed by the primarily poured block and the secondarily poured block. The joint-crossing steel bar can be arranged by crossing the joint in the middle of the face and can also be arranged in an upper-layer and lower-layer manner by crossing the joint in the face. Double-layer joint-crossing steel bars comprise an upper-layer joint-crossing steel bar and a lower-layer joint-crossing steel bar which are combined respectively to form an upper-layer reinforcing mesh and a lower-layer reinforcing mesh, and the upper-layer reinforcing mesh and the lower-layer reinforcing mesh are connected through connecting bars. With the adoption of the structure, the operation safety of a dam can be improved, the service life of the dam can be prolonged, deformation influences of the primarily poured block in the pouring process are reduced, and the horizontal construction joint is more suitable for being used under weighted cover and blanket zones of the long face rockfill dam and under the condition of temporary stopping of silo pouring due to construction causes.

Description

technical field [0001] The invention relates to the field of earth-rockfill dam construction, in particular to a horizontal construction joint of a rockfill dam face and a construction method thereof. Background technique [0002] At present, most of the face panels of rockfill dams, especially the long slabs, adopt the method of pouring the slabs in stages in order to control the cracks in the slabs. Especially for the long slabs, at the horizontal joints, the concrete surface is only treated with conventional construction joints, and Take chiseling and structural reinforcement through joints. The same is true for the construction joints when the panel is terminated for special reasons and continues to be poured. The departmental specification of the Ministry of Water Resources also expressly stipulates that the joints of segmental pouring shall be treated as construction joints. [0003] This traditional construction joint treatment method leaves a weak surface at the pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/16E02B7/06
CPCE02B3/16E02B7/06
Inventor 黄静黎科雷金年黎学皓蔡旺林陆江华曹运磊胡方华刘世艳
Owner CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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