Grouting reinforcement and earthquake resisting method for earth and rockfill dam

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...

AI Technical Summary

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

Images