Advancing construction method of long tube shed

Abstract

The invention discloses an advancing construction method of a long tube shed, comprising the following steps of: horizontally drilling in a guiding way to form a guide hole from one end of an arch part of an undermining subway station by adopting a non-excavation horizontal guiding drilling technology; then back pulling a steel tube from the other end of the undermining subway station; then grouting; forming an advancing supporting and protecting system on the arch part of the undermining subway station; and validating after the excavation of the undermining subway station. The invention has the advantages that a more perfect construction technology is formed for constructing the single long tube shed with the length of 146m by horizontally drilling in a guiding way from one end of the undermining subway station, the problem that the length of a single tube shed positioned on the arch part of the traditional subway station is shorter is effectively solved, and a longer tube shed can be constructed in one step, the longitudinal effect of the tube shed positioned on the arch part of the undermining subway station is strengthened, the overlapping work amount needed by the subsection implementation of the tube shed is saved, the construction interference on the excavation of the undermining subway station is reduced, and the construction hazard of the undermining subway station is greatly reduced.

Description

technical field [0001] The present invention relates to the construction technology of long pipe sheds in advance of underground digging subway arches, especially the construction technology of long pipe sheds in advance of underground excavation subway arches with a circumferential distance of 33cm and a single length of 146m by horizontally oriented drilling from one end. It is suitable for shallow The advance support of the arch part of the underground excavation subway structure. Background technique [0002] Along with the development of my country's urban subway and traffic fast track, more and more large cities are building subways. Due to the construction of underground railways in cities, the construction methods are greatly affected by factors such as ground buildings, roads, urban traffic, hydrogeology, environmental protection, construction machinery and tools, and most of the sections that urban subways pass through are bustling commercial areas and Traffic art...

AI Technical Summary

Problems solved by technology

Due to the construction of underground railways in cities, the construction methods are greatly affected by factors such as ground buildings, roads, urban traffic, hydrogeology, environmental protection, construction machinery and tools, and most of the sections that urban subways pass through are bustling commercial areas and Traffic arteries, affected by demolition and modification costs, traffic occupation, protection of underground pipelines, protection of ancient cultural relics, environmental protection, etc., the cut-and-cover (cover-cut) subway stations are restricted, and can only be constructed by underground excavation; Underground excavation subway construction is faced with the influence of weak ground, ground and underground buildings (structures), and the construction safety risk is very large; and the advanced long pipe shed support system reinforces the underground excavation subway arch stratum, creating favorable conditions for underground excavation subway excavation. However, the length of a single pipe shed in the arch of underground excavation subway is generally short, the stiffness is small, and the longitudinal effect is poor, and the cyclic implementation of pipe shed construction requires a large amount of work, and the section needs to be raised several times. The excavation process is greatly disturbed, which not only wastes the engineering amount of lap joints between each ring in the vertical direction of the pipe shed, but also has to pick up the operating space again for each cycle of construction, which increases the amount of engineering and increases the risk of underground excavation subway construction