Grouting reinforcement and earthquake resisting method for earth and rockfill dam

A technology of grouting reinforcement and earth-rock dams, which is applied in the direction of dams, barrages, weirs, etc., can solve problems such as slippage and rockfill body loosening, and achieve the effects of no harm to the environment, short construction period and low cost

Active Publication Date: 2012-07-25
HOHAI UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the existing "whiplash effect" on the dam crest of high earth-rock dams under the action of earthquake load, which leads to the loosening and slipping of rockfill bodies, as well as the shortcomings of conventional reinforced anti-seismic measures. Earth-rock Dam Grouting Reinforcement Anti-seismic Method

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  • Grouting reinforcement and earthquake resisting method for earth and rockfill dam
  • Grouting reinforcement and earthquake resisting method for earth and rockfill dam
  • Grouting reinforcement and earthquake resisting method for earth and rockfill dam

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Embodiment Construction

[0035] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The protection scope of the present invention is not limited by the specific embodiments, but by the claims.

[0036] like figure 1 , 2 , 3, 4, 5 and 6, a kind of earth-rock dam grouting reinforcement anti-seismic method, its technical steps are:

[0037] During the construction process, firstly, according to the seismic design requirements of the dam, within the height range of 1 / 4 to 1 / 5 of the upstream and downstream of the dam crest, the tops of the upstream rockfill body (1) and the downstream rockfill body (3) are placed at a certain Arrange drilling holes in a regular shape such as a triangle or a square, and follow up the grouting casing (4) in time, and do not perform grouting treatment on the core wall (2).

[0038] During the construction of the dam body, layered filling is adopted. When the dam body is constructed to the elevation...

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Abstract

The invention discloses a grouting reinforcement and earthquake resisting method for an earth and rockfill dam, which includes the technical steps: using a drilling machine to drill holes at certain intervals on the upstream top and the downstream top of a dam in a range from one-quarter dam height to one-fifth dam height during filling of the dam; driving grouting casings for drilling supporting or pre-embedding horizontal grouting casings with holes in real time; injecting polymer materials into the grouting casings through grouting pipes; allowing the polymer materials to chemically react in the grouting casings and quickly swell and allowing the polymer materials to permeate into surrounding rockfill to be cemented with rockfill through voids inside the rockfill; and forming a solid flexible reinforced complex so that cohesion of rockfill complex is increased and seismic resistance of the dam is improved. The method is applicable to newly built earth and rockfill dams, is also applicable to earth and rockfill dams built already, and is fast in construction, the reinforcement is the flexible complex and adaptable to deformation of the dam under the action of seismic load, and good seismic resisting effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and relates to an internal grouting technology of a rockfill body and a construction method thereof, in particular to an anti-seismic method for strengthening an earth-rock dam by grouting. [0002] Background technique [0003] my country is located between the circum-Pacific seismic belt and the Mediterranean Sea-Himalayas seismic belt, with large-scale and complex geological structures, frequent moderate and strong earthquakes, high intensity, shallow focus, wide distribution, and serious disasters. According to experts' predictions, my country's future Several years will enter the seismically active period. Earth-rock dam is a commonly used dam type in water conservancy and hydropower projects. With the continuous development of water conservancy and hydropower resources and the advancement of dam construction technology, the construction of high earth-rock dams has deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/06
Inventor 刘汉龙杨贵王复明陈育民刘彦辰
Owner HOHAI UNIV
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