Existing roadbed steel floral tube grouting method

Abstract

The invention provides an existing roadbed steel floral tube grouting method. The existing roadbed steel floral tube grouting method comprises the following steps that a first drill bit is adopted to drill a hole in a position to be grouted, and the first drill bit is taken out after the hole is drilled to the hole sealing depth; a steel floral tube is adopted to continue drilling to the designed depth on the basis of hole sealing, a second drill bit is arranged at the end of the steel floral tube located on the inner side, the outer diameter of the first drill bit is larger than that of the second drill bit, and the outer diameter of the second drill bit is larger than that of the steel floral tube; a space enclosed by the inner wall of the sealing hole and the outer wall of the steel floral tube is filled; grouting is conducted in the steel floral tube, and grout permeates into a roadbed through the grouting holes in the steel floral tube. According to the method, a gap is formed between the steel floral tube and a hole wall, soil on the hole wall cannot block the grouting hole in the steel floral tube, the grouting amount per minute is greatly increased, the resistance generated when the steel floral tube is tamped in is reduced, in addition, the grout leakage phenomenon can be avoided by the sealing hole.

Description

technical field [0001] The invention relates to roadbed reinforcement, in particular to a grouting method for existing railway steel pipes. Background technique [0002] The existing railways were not densely compacted due to construction and rolling. The early railways were limited by machinery and manually compacted, and the density could not meet the current train speed standards. Especially in southern my country, there is abundant rainfall, and the rainwater soaks into the roadbed, causing the roadbed to sink. Railway workers maintain The workload of the line increases, the roadbed slides and collapses, and the flood control pressure of the railway department increases. In order to solve this disease, the design department often adopts the construction technology of steel pipe grouting. [0003] The traditional grouting process is to first process the innermost end of the steel pipe into a pointed shape, use a bench drill to drill holes in the wall of the steel pipe, and...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a grouting method for existing subgrade steel pipes, aiming to solve the problem of easy plugging of holes and easy grout leakage in the traditional grouting process

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