A treatment method for poor foundation of concrete dam joints

Abstract

The invention relates to a treatment method for poor concrete dam joint foundations. The treatment method for the poor concrete dam joint foundations does not affect operation of railways or highways and meets the requirements of water-power engineering junction layouts. The treatment method aims at achieving the foundation strength and the seepage-proofing purpose of a concrete dam joint under poor geological conditions, guaranteeing operation safety of the highways in the flood season, reducing slope excavation, reducing waste slag fields, facilitating water and soil conservation and saving engineering investment. According to the technical scheme, the concrete dam joint is arranged on one side of a highway and comprises the concrete dam joint foundation I adjacent to the highway and the adjacent concrete dam joint foundation II; after the concrete dam joint foundation I is excavated, steep slopes are formed, plain concrete 20 cm in thickness needs to be sprayed to the steep slopes for slope fixation, it is found that a foundation weak intercalated layer is arranged below the concrete dam joint foundation I during construction with the attitude of rock slowly inclines to the downstream, and the inclination angle ranges from 20 degrees to 35 degrees. The treatment method is suitable for hydraulic and hydroelectric engineering.

Description

technical field [0001] The invention relates to a treatment method for poor foundation of concrete dam joints, which is suitable for water conservancy and hydropower projects. Background technique [0002] Hydropower engineering hubs have high requirements on the bearing capacity and anti-seepage of the dam foundation. The structural foundation of the dam joint should preferably be located on the bedrock. When complex foundation conditions such as interlayers are adjacent to railways or highways, the excavation of foundations for slopes and dam joints is greatly restricted or even impossible to construct. The problem of building key water conservancy and hydropower projects on plain rivers is very serious. The danger of construction is particularly great when the flood season comes. It is difficult to excavate the foundation of the dam joint, and the cutting of the road during the construction period will affect the traffic. However, it will bring the risk that the foundati...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a treatment method for the poor foundation of concrete dam joints that does not affect the operation of railways and roads and meets the layout of hydropower project hubs, aiming at solving the problems of concrete dams under poor geological conditions. The foundation strength and anti-seepage of dam joints ensure the safety of highway operation during flood seasons, reduce slope excavation, and reduce spoil sites, which is conducive to water and soil conservation and saves engineering investment

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