TunneL unfavorabLe geoLogy surrounding rock comprehensive probing treating construction method

Abstract

The invention discLoses a tunneL unfavorabLe geoLogy surrounding rock comprehensive probing treating construction method. FirstLy, a comprehensive advanced probing technoLogy is utiLized to initiaLLydetermine a Large-size or super-Large size unfavorabLe geoLogic body, the unfavorabLe geoLogic body is taken as a 'bLack box' area, conditions of engineering geoLogy of an about 30 m range in front ofa face are probed in detaiL, the range is pre-reinforced to form 'advanced man-made surrounding rock', then tunneLing and excavation are conducted, in the process, probing dead areas are probed, andthe pre-reinforcing effect is detected; in order to ensure the safety of the face effect, the advanced man-made surrounding rock of 8-10 m needs to be reserved in front of the face and is taken as a reserved safe LaccoLite for the next circuLar probing treating construction. The method is appLicabLe to the construction of Large-size or super-Large size unfavorabLe geoLogy tunneLs, when the construction is conducted in a tunneL with the high safe risk, the principLes that 'excavation cannot be conducted before probing, and key parts shouLd be probed and reinforced' can be stuck to, the safety and quaLity of tunneL construction are ensured, and Larger popuLarizing vaLue is achieved in the construction of Large-size or super-Large size unfavorabLe geoLogy tunneLs.

Description

technical field [0001] The invention relates to the field of tunnel geology, in particular to a construction method for comprehensive exploration and treatment of unfavorable geological surrounding rocks of tunnels. Background technique [0002] Tunnel engineering is a kind of underground engineering. Although the geological conditions of the tunnel have been explored and evaluated to a certain extent in the tunnel design and engineering geological survey before construction, due to the complexity of the geology, the survey data and the actual situation after tunnel excavation Circumstances may vary considerably. There are a large number of tunnel projects in the field of water conservancy, hydropower and transportation in my country. Geological disasters are the key factors restricting tunnel construction. Often due to the unknown geology in front of the tunnel and the inability of survey data to completely and accurately reflect the geological conditions in front of the co...

AI Technical Summary

Problems solved by technology

For example, the commonly used TSP technology has a detection range of 100-150m, but the accuracy is low and the error is large, especially for irregular geological bodies or unfavorable geological bodies parallel to the tunnel axis, such as cylindrical or conical caves, underground rivers and water-bearing conditions Detection is limited

Within the detection range of ground radar within 30m, due to many interference factors, false anomalies are often caused, resulting in misjudgment

The effective detection range of existing common horizontal drilling equipment is 50-60m

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