Railroad bed repair method without affecting existing running conditions

Abstract

The invention discloses a railroad bed repair method without affecting existing running conditions. The method comprises the following steps of: determining the destroy section position and the destroy type of a bed; drilling grouting holes on two sides of the destroy section bed; determining a grouting method and a grouting material according to the destroy type and the destroy section position; and grouting the grouting material into the bed by using the grouting method through the grouting holes. The construction of the scheme does not occupy the railway running space, does not affect normal running of the railway, and can perform reinforcement from the surface of the bed to the deep place of dozens of meters below the bed. The foundation and the ground surface do not need to be dug during construction, so the method has low labor intensity, high mechanization degree and short construction period, effectively treats frost boiling, sinking, extrusion, freezing injury and the like, improves the bearing capacity of the bed and improves the drainage resistance of the bed.

Description

Technical field [0001] The invention relates to a construction technology for remediation and reinforcement of existing railway line foundation diseases, in particular to a method for repairing railway foundations without affecting existing driving conditions. Background technique [0002] Existing railway subgrade diseases mainly include mud boiling, sinking, extrusion and freezing damage. [0003] At present, the roadbed disease remediation measures generally adopt the subgrade replacement method. This method is to replace the weak subgrade that is prone to sinking, external squeezing or deep sinking. The thickness of the replacement depends on the thickness of the weak layer, generally 50~60cm. The general section of the disease can be replaced by well-graded gravel soil or medium-coarse sand, or modified soil formed by mixing materials that improve soil engineering properties into the original bed soil. The subgrade replacement method not only improves the strength of the sur...

AI Technical Summary

Problems solved by technology

[0004] Although the subgrade bed replacement method has a good replacement effect and can improve the surface strength of the subgrade bed, it is not capable of treating diseases deep below the subgrade.

Moreover, the construction intensity is high, and it is generally necessary to blockade the existing railways to restrict the passage of railway vehicles, and the construction period is relatively long; The distance between large vehicles is short, and the construction through the interval will undoubtedly greatly increase the construction period

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