Construction method for non-excavation horizontal directional drilling of underneath passing existing railway

Abstract

The invention relates to a construction method for non-excavation horizontal directional drilling of underneath passing an existing railway. The construction method comprises the following steps that S1, surveying and setting out are conducted, specifically, a total station is used for setting out the center line of a pull pipe; S2, foundation pits are excavated, specifically, the foundation pits are excavated in the two sides of the existing railway; S3, drilling machines are arranged, specifically, the drilling machines are arranged in the working pits; S4, guiding drilling is conducted, specifically, after the drilling machines are arranged, guiding rods of the drilling machines are adjusted to the positions higher than the center elevation of the designed pipe position, and the drilling machines horizontally drill into soil; S5, chambering is conducted, specifically, after guiding drilling holes drill into receiving pits from the working pits, guiding drill bits are dismounted, and then back-expanding heads are mounted for repeated chambering; S6, pipelines are welded, specifically, the pipelines are fixed, and then hot melting butt joint is conducted; S7, the pipe is pulled, specifically, pipe heads of PE pipes are sealed through PE pipe sealing sleeves, then the back-expanding heads are connected to the rear ends of the pipe heads, and then the pipe is pulled; and S8, the foundation pits are backfilled, specifically, after construction is completed, the working pits are backfilled with fine soil. The construction method has the effects that the cost is saved, and the construction period is shortened.

Description

technical field [0001] The present application relates to the field of railway engineering construction, in particular to a construction method for trenchless horizontal directional drilling under an existing railway. Background technique [0002] In recent years, with the development of the national economy, the improvement of the quality of life, and the gradual strengthening of people's awareness of modern civilization and environmental protection, social problems, traffic problems and environmental pollution problems caused by excavating roads for various underground pipeline constructions have become more and more serious. The more the people pay attention, the laws and regulations restricting excavation and construction in cities have been promulgated one after another. Therefore, a more advanced and safe construction method is needed to organize and guide environmental protection and municipal pipeline network expansion projects and pipeline crossing railway engineerin...

AI Technical Summary

Problems solved by technology

[0003] At present, in similar constructions, traditional construction methods are often used. First, the existing railway line is reinforced, and then the foundation pit is expanded by open excavation, and the subsequent Pipeline jacking construction requires a long construction period, many personnel and mechanical equipment, complex and cumbersome procedures, and high construction costs

[0004] In view of the related technologies mentioned above, the inventor believes that in the pipeline crossing railway engineering project, the traditional construction method has a long construction period and high construction cost

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