Construction methods for unfavorable geology in tunnel engineering in high altitude areas

Abstract

A construction method for unfavorable geology during tunnel engineering in high-altitude areas includes the following steps that (1) an advanced geological report is provided; (2) advanced supportingconstruction is carried out; (3) tunneling is carried out; (4) drainage treatment is performed for surge water; (5) initial supporting construction is performed; (6) after initial supporting is completed, grouting reinforcement is conducted at the position with large arch crown and haunch deformation; (7) a waterproof layer is laid on the surface of low-temperature concrete, and geotechnical clothis used for protection; and (8) an inverted arch and a second lining are constructed. According to the construction method, the damage degree and construction risks of unfavorable geology to tunnel construction are effectively reduced, construction safety is ensured, a large amount of precious experience is provided for high-altitude tunnel design and construction, and beneficial guidance and reference effects are achieved for tunnel design construction in high-altitude and alpine areas.

Description

Technical field

[0001] The invention relates to the technical field of tunnel engineering construction, in particular, to a construction method aimed at bad geology in tunnel engineering in high altitude areas. Background technique

[0002] With the development of society and economy, there are more and more deep linear rock projects such as tunnels, and the depth is also increasing. The development and construction of the transportation infrastructure and hydropower resources in western my country, especially in the southwest region, has entered its heyday, and the scale of related transportation facilities upgrades, renovations, and development has continued to increase. High-altitude areas have been built, soon to be completed, and planned and built. More and more tunnels. The southwestern plateau of my country is formed by the compression of the Eurasian continental plate and the Indian Ocean plate. The geological age is new and the plate tectonics are active. As the depth of...