High ground stress soft rock tunnel monitoring and measurement method

Abstract

The invention provides a high ground stress soft rock tunnel monitoring and measurement method. A high ground stress soft rock tunnel monitoring and measurement specific scheme is established according to tunnel design; a tunnel starts to be constructed, tunnel excavation is started, and a primary support is constructed; a measuring instrument is used to conduct monitoring and measurement on the construction process to obtain monitoring and measurement data; regression analysis is conducted on the monitoring and measurement data, and an inverted arch and the secondary lining constructing timeare determined; the tunnel deformation grade is determined according to the tunnel face sketch condition and monitoring and measurement data regression analysis; the tunnel management reference is determined according to the tunnel deformation grade; tunnel stability is then evaluated, and if safety requirements are meet, second lining is constructed; and if the safety requirements are not met. The steps are repeatedly conducted according to construction conditions. By means of the scheme, monitoring and measurement can be correctly conducted, monitored and measured real data can be effectively fed, supporting parameters and construction management grades are adjusted through the monitoring and measurement data, the tunnel construction safety is improved, and capital cost pressure is reduced.

Description

technical field [0001] The invention relates to the field of highway tunnels, in particular to a monitoring and measuring method for high ground stress soft rock tunnels. Background technique [0002] In recent years, more and more mountainous roads have been planned and built, and more and more tunnels have been planned and built, especially in some southwest mountainous areas, which are characterized by high seismic intensity, accompanied by fault fracture zones, deep burial, and high ground stress. Tunnels in water-rich soft rock strata have brought great difficulties to tunnel construction. The initial support has been deformed for a long time. Here comes a great danger. The long-term monitoring and measurement observation data is not timely and cannot be effectively judged, which often leads to large deformation, cracking, damage, and intrusion of the initial support, which brings major hidden dangers to the safety and quality of the tunnel, and also affects the constr...

AI Technical Summary

Problems solved by technology

[0002] In recent years, more and more mountainous roads have been planned and built, and more and more tunnels have been planned and built, especially in some southwest mountainous areas, which are characterized by high seismic intensity, accompanied by fault fracture zones, deep burial, and high ground stress. Tunnels in water-rich soft rock strata have brought great difficulties to tunnel construction. The initial support has been deformed for a long time. There is a great danger

The long-term monitoring and measurement observation data is not timely and cannot be effectively judged, which often leads to large deformation, cracking, damage, and intrusion of the initial support, which brings major hidden dangers to the safety and quality of the tunnel, and also affects the construction period. Capital cost creates serious pressure

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