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A method for reinforcement and anti-seepage of a natural rockfill dam in a barrier lake

A rockfill dam and natural technology, which is applied in the field of risk removal, reinforcement and seepage prevention of natural rockfill dams in dammed lakes, can solve problems such as being unsuitable for risk removal and seepage prevention reinforcement construction, and achieves reasonable process setting, good seepage prevention effect, and improved The effect of stability

Active Publication Date: 2021-02-23
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The construction is convenient, the construction period is shortened, the project cost is reduced, and it has good engineering benefits. However, the patented technology of this invention is not suitable for the danger-relief and anti-seepage reinforcement construction of natural rockfill dams in dammed lakes.

Method used

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Embodiment Construction

[0039] The method for eliminating danger, strengthening and anti-seepage of natural rockfill dam of barrier lake described in the present invention comprises the following steps:

[0040]Step 1, pouring the concrete cover layer of the rockfill dam:

[0041] Step 1.1, measure and stake out, expand the 50cm mark along the sideline of the heavy layer of concrete cover, 1m 3 The excavator cooperates with manual excavation to level the foundation surface, adopts 15t vibratory rolling and compaction, and supports the formwork around.

[0042] Step 1.2, pouring concrete cover layer:

[0043] Pour a 6m wide C15 concrete cover layer on the excavated and compacted foundation surface, with a thickness of at least 0.3m. The pouring is performed from left to right by jumping warehouses, and the length of each warehouse is 10m. Concrete is transported by concrete tanker, directly into the warehouse and paved. Use a plug-in vibrator to vibrate compactly, wait for coagulation, and the waiti...

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Abstract

The invention belongs to the technical field of seepage control in hydraulic engineering, and particularly relates to a danger removing and strengthening seepage control method for a barrier lake natural rock-fill dam. The method comprises the steps of pouring a concrete cap weight layer of the rock-fill dam; installing a borehole orifice-pipe; performing boring construction; and performing grouting construction. According to the danger removing and strengthening seepage control method for the barrier lake natural rock-fill dam, consistence of grouting slurry is adjusted at any time during thegrouting construction, so that a better seepage control effect can be achieved and stability is improved; the pipe fixation problem is solved by an employed small diameter boring and grouting technology; and construction cost is effectively reduced by the employed grouting slurry material.

Description

technical field [0001] The invention belongs to the technical field of anti-seepage of water conservancy projects, and in particular relates to a method for removing danger and reinforcing anti-seepage of a natural rockfill dam of a barrier lake. Background technique [0002] The formation of natural rockfill dams in barrier lakes has a loose structure and complex formations, making it difficult to form holes. At present, the drilling method generally adopts cemented carbide drill bits to drill, and this method is easy to cause the problems of drill dropping and hole collapse. The current grouting material is cement clay slurry with a ratio of cement:clay of 1:1. Although this slurry material is economically reasonable, it has a long initial setting time, low strength, and is easy to be damaged, so it cannot meet the requirements. [0003] For example, the patent invention of Chinese patent application No. CN201510134081.9 discloses a seepage prevention method and structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B3/16E02B7/06E02D15/04
CPCE02B3/16E02B7/06E02D15/04
Inventor 张华田庞军宁凯乐马勇举陈咏梅魏爽
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD
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