One-kilometer or above advance geology forecast method of tunnel

Abstract

The invention provides a one-kilometer or above advance geology forecast method of a tunnel. The method includes the following steps that S1, a horizontal directional drilling machine is arranged at the position of an exit or an entrance of the tunnel, horizontal directional drilling is conducted along the parallel line of the axis of the tunnel, and the drilling distance reaches 1000 m or above from the tunnel excavation fracture surface; S2, excavation construction is conducted along the axis of the tunnel, when construction is conducted to a planned tunnel side cave, the tunnel side cave isexcavated, the horizontal directional drilling machine is transported to the tunnel side cave and is made to continue to conduct drilling in the direction of the parallel line of the axis of the tunnel, coring and detecting are conducted, and geology data required by tunnel excavation construction are obtained; and S3, the step S2 is executed repeatedly till the horizontal directional drilling machine drills out of the tunnel, and the complete geology data advance forecast of the tunnel is completed. The one-kilometer or above advance geology forecast method has the beneficial effects that high-precision ultralong-distance advance geology drilling is conducted at a tunnel portal and in the tunnel side cave, detailed stratum parameters are obtained, and no influence is caused to tunnel construction.

Description

technical field [0001] The invention relates to the field of geological survey of tunnel engineering, in particular to a method for advanced geological prediction of tunnels over a kilometer in length. Background technique [0002] With the rapid development of my country's economy, the construction volume of underground space projects such as highways and railway tunnels in my country is increasing year by year. The investment decision-making, route selection, construction method selection, equipment selection and configuration, support form and parameters, construction period and cost determination of tunnel engineering all require refined and accurate engineering geology, hydrogeology, rock mass parameters and other survey data as support. These data can be obtained from two aspects: traditional engineering geological survey methods and traditional advanced geological prediction. Traditional engineering geological survey methods use vertical holes arranged at intervals ...

AI Technical Summary

Problems solved by technology

However, the traditional geological survey method requires heavy drilling workload and discontinuous survey holes, which cannot truly and comprehensively reflect the geological characteristics of the surrounding rock of the tunnel. Complex and harsh areas are restricted by factors such as transportation, water supply, site, personnel health and environmental protection, so it is difficult to implement normally, and the comprehensive engineering cost is very high; while the detection depth of the tunnel's advanced geological prediction is very shallow, and the drilling direction is uncontrollable. It is of little significance for the rapid construction of modern tunnels, and it is a little "chicken rib". In addition, during the construction of geological forecast in advance, the tunnel excavation construction needs to be interrupted, which increases the construction period and cost

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